INSTALLATION
INSTRUCTIONS
Litho U.S.A.
2003
©
TUA*S(N,L)(A,S)F
*045, 060, 075, 100, and 125
Lennox Industries Inc.
Dallas, Texas, USA
T-CLASSTM SEPARATED COMBUSTION
UNIT HEATERS
Table Of Contents
Unit Dimensions………………………………
Shipping………………………………………
Requirements…………………………………
Unit Heater Installation………………………
1, 2 Leak Check………………………………………..
13
14
16
16
17
3
3
4
4
Start-up Operation………………………………...
Heating Sequence of Operation…………………
Ignition Control LED………………………………
Adjustments…………………….………………….
Combustion
&
Ventilation
Air…………………
Venting…………………………………………
Electrical Connections………………………
5
Service……………………………………………..
Wiring Diagram………………….………………..
19
20
12
Gas Connection……………………………… 13
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
If the information in this manual is not
followed exactly, a fire or explosion
,
may result causing property damage
personal injury or loss of life.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Extinguish any open flame.
• Do not touch any electrical switch; do not use any
phone in your building.
Do not store or use gasoline or
other flammable vapors and
liquids in the vicinity of this or any
other appliance.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier; call the fire
department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
P/N: 065354800
ORGINATED: 5/04
REVISED: 11/04
SUPERSEDES: NEW
Technical literature form number 504,955M
100 and 125 UNIT DIMENSIONS
5-1/2
(140)
THREADED STUDS
24-7/16
(621)
AIR
FLOW
21-5/16
(541)
32-3/8
(822)
HEAT
EXCHANGER
(ALUMINIZED STEEL)
7-1/4
(184)
1/2
(13)
TOP VIEW
36-1/2
(927)
32-3/8
(822)
8-1/2
(216)
DIRECT
DRIVE FAN
7-3/8
(187)
FLUE
OUTLET
THUMB
SCREW
ELECTRIC
BOX
21
(533)
7 (178)
7-3/4
(197)
SERVICE
ACCESS
DOOR
SITE
GLASS
COMBUSTION AIR INLET
ADJUSTABLE
LOUVERS
GAS
INLET
SIDE VIEW
BACK VIEW
TABLE 1
UNIT CLEARANCES
Top
Sides
mm
25
Access Panel
Bottom
Rear
mm
457
Single Wall Vent*
in
1
mm
25
in
1
in
mm
457
in
mm
0
in
in
6
mm
152
Model
TUA45S, TUA60S, TUA75S,
TUA100S, TUA125S
18
0
18
*Except for listed clearance thimbles
Page 2
Requirements – CSA in Canada
Shipping
The heater is completely assembled. Two mounting
brackets are included with the 45, 60, and 75 size units.
Check the unit for shipping damage. The receiving party
should contact the last carrier immediately if any shipping
damage is found.
The instructions are intended only as a general guide and
do not supersede local codes in any way. Authorities
having jurisdiction should be consulted before installation.
The installation must conform with local building codes or
in the absence of local codes, with the current code CSA-
B149.1 “Installation Code for Natural Gas Burning
Appliances and Equipment." All electrical wiring and
grounding for the unit must also comply with the
Canadian Electrical Code CSA C22.1, current edition.
Requirements – CSA in the USA
Installation of gas unit heaters must conform with local
building codes or, in the absence of local codes, with the
current National Fuel Gas Code ANSI Z223.1.
Installation in aircraft hangers must be in accordance with
the current Standard for Aircraft Hangers ANSI/NFPA No.
409.
Installation in parking structures must be in accordance
with the current Standard for Parking Structures
ANSI/NFPA No. 88A.
These unit heaters are CSA International certified for the
clearances to combustible material listed on the rating
plate and table 1. Adequate clearance shall be provided
around the appliance and around air inlet terminals.
Provision shall be made for service accessibility to the
heater. Note that fire protection clearances may be
exceeded to provide additional space for service and
accessibility.
Installation in repair garages must be in accordance with
the current Standard for Repair Garages ANSI/NFPA No.
88B.
GARAGE INSTALLATIONS:
1- In a storage area, clearance from heaters to
combustible materials must be such that the material
shall not attain a temperature above 160°F by
continuous operation of the unit.
2- Eight foot minimum clearance from the floor to the
bottom of the heater must be maintained. Refer to the
CSA-B149 Codes.
These units are approved for residential applications.
Residential applications are defined as installations for
heating non-living spaces that are attached to, adjacent
to or part of a structure that contains space for family
living quarters. For installation in a residential garage
these units must be installed so that burners and ignition
source are located no less than 18" (457mm) above floor.
Heater must be located or protected to avoid physical
damage by vehicles. Refer to the National Fuel Gas
Code, ANSI Z223.1, current edition.
AIRCRAFT HANGER:
1- In an area where aircraft are housed or serviced, 10'
minimum clearance from highest surface of aircraft to
bottom of the heater must be maintained.
2- In other areas, 8' minimum clearance from the floor to
bottom of heater must be maintained.
3- Heaters should be located so as to be protected from
damage from aircraft or other appliances needed for
servicing of aircraft. Refer to requirements of the
enforcing authorities.
Authorities having jurisdiction should be consulted before
installation.
The National Fuel Gas Code is available from:
American National Standard Institute Inc.
11 West 42nd Street
New York, NY 10036
These units are CSA International design certified. These
unit heaters are certified for installation clearances to
combustible material as listed in table 1 and on unit rating
plate. Accessibility and service clearances must be
observed in addition to fire protection clearances.
All electrical wiring and ground for unit must be in
accordance with the regulations of the current National
Electric Code ANSI/NFPA No. 70.
RESIDENTIAL INSTALLATIONS:
These units are approved for residential applications.
Residential applications are defined as installations for
heating non-living spaces that are attached to, adjacent
to or part of a structure that contains space for family
living quarters. For installation in a residential garage,
these units must be installed so that burners and ignition
source are located no less than 18" (457mm) above floor.
Heater must be located or protected to avoid physical
damage by vehicles. Refer to CSA-B149.1, current
edition.
The National Electric Code is available from:
National Fire Protection Association
1 Batterymarch Park
PO Box 9101
Be sure to check with local codes and ordinances for
additional requirements.
Quincy, MA 02269-9101
Page 3
.
Secure mounting brackets to unit with retained
screws.
Unit Heater Installation
6- To support unit, secure mounting bracket to ceiling
joist or truss. Unit may also hang on rods as shown
in figure 1.
INSTALL UNIT HEATER
SUPPORT
RODS
MOUNTING BRACKETS
(45, 60, & 75 MODELS
ONLY)
100 and 125 size units may not be inverted, 3/8” X 16
threaded inserts are provided in the top the cabinet.
Two threaded inserts are along one edge of the cabinet,
two inserts are in the panel that divides the heat
exchanger section from the control compartment.
1- Cut threaded rods to desired length and thread a
3/8” nut onto the rod.
2- Slide a flat washer onto the threaded rod AFTER
the nut (7/16” I.D. X 1” O.D. X 1/16” THK washer).
3- Screw the rods (four) into the threaded inserts on
the unit.
4- Tighten nuts to secure unit to rods.
NORMAL POSITION (ABOVE) ALL MODELS
Combustion and Ventilation Air
MOUNTING
Adequate facilities for supplying air for combustion and
ventilation must be provided. All gas fired appliances
require air to be used for the combustion process. If
sufficient quantities of combustion air are not available,
the heater or another appliance will operate in an
inefficient manner, resulting in incomplete combustion
which can result in the production of excessive carbon
monoxide.
SUPPORT
RODS
BRACKETS (45, 60,
&75 MODELS ONLY)
CAUTION - Insufficient combustion air can cause
headaches, nausea, dizziness, asphyxiation or death.
This unit must be provided with a combustion air pipe
that is connected to the outside atmosphere. Outdoor
air used for combustion must be free of the following
substances or the life of the heat exchanger will be
adversely affected: chlorine, carbon tetrachloride,
cleaning solvent, halogen refrigerants, acids, cements
and glues, printing inks, fluorides, paint removers,
varnishes, or any other corrosives.
OPTIONAL INVERTED POSITION (ABOVE)
45, 60, AND 75 MODELS ONLY
FIGURE 1
45, 60, and 75 size units may be installed in the normal
position or inverted 180° as shown in figure 1 depending
on desired location as governed by clearances, vent
connection, air direction, gas supply, electrical supply
and service accessibility.
TABLE 2
MAXIMUM HORIZONTAL VENT LENGTHS
Model
45, 60, 75
100, 125
1- Rotate louvers directing airflow as desired.
2- Choose location for mounting brackets.
3- Remove the mounting brackets from their shipping
location (attached to the top of the unit) and replace
the screws that held the brackets in their shipping
location.
No. of Elbows
Ft (M)
Ft (M)
1
2
3
4
5
25 (7.6)
20 (6.1)
15 (4.6)
10 (3.0)
5 (1.5)
25 (7.6)
20 (6.1)
15 (4.6)
10 (3.0)
5 (1.5)
4- Remove and retain screws along top edge (bottom
edge when inverted) of front of unit.
5- Align screw holes on mounting bracket with holes
along top edge (either upright or inverted) of unit.
Page 4
Venting and Combustion Air Inlet
be 3” (76mm) diameter on 45 units and 4” (100mm)
diameter on 60/75/100/125 units.
A-General Recommendations and Requirements
NOTE - The vent is a passageway, vertical or nearly so,
used to convey flue gases from an appliance, or its vent
connector, to the outside atmosphere. The vent
connector is the pipe or duct that connects a fuel-gas
burning appliance to a vent or chimney. The combustion
air inlet is a pipe that connects the appliance to the
outside atmosphere to convey oxygen from the air to
the appliance burner.
3- Keep the vent and air inlet runs as short as possible
with a minimum number of elbows. Refer to the
(American) National Fuel Gas Code ANSI Z223.1 or
(Canada) CSA-B149 Installation Code for maximum
vent and vent connector lengths. Horizontal run of
the vent connector from the induced draft blower to
the chimney/vent cannot exceed the values in table
2. Single wall vent connector shall not be insulated.
4- If a single wall vent is used in an unheated area it
shall be insulated with a minimum of 1/2" thick foil
faced fiberglass 1-1/2# density insulation. Failure to
do so will result in condensation of flue gases.
Unit heaters must be vented in compliance with all local
codes or requirements of the local utility, the current
standards of the (American) National Fuel Gas Code,
ANSI Z223.1 or (Canada) CSA-B149 Installation Codes,
and the following instructions.
A vent connection flange and a combustion air pipe
connection flange are attached to the back of the unit.
Single wall vent material shall have all seams and joints
sealed with pressure sensitive aluminum tape or
silicone rubber sealant. Aluminum tape must meet the
provisions of SMACNA AFTS-100-73 Standards. The
aluminum tape has a temperature rating of 400°F
5- The unit may be vented vertically as a single
appliance or as a common vent with other gas-fired
appliances. In common venting situations, vent
connectors for other appliances must maintain a 4"
(100mm) vertical separation between the vent
connectors. Refer to common venting tables in the
(American) National Fuel Gas Code ANSI Z223.1 or
(Canada) CSA-B149 Installation Code for proper
vent size.
(204°C). Silicone rubber sealant must have
a
temperature rating of 482°F (250°C), i.e., Dow Corning
RTV-736 or equivalent. All joints shall be secured with
at least two corrosion resistant screws. All joints must
be checked for gas tightness after installation.
Single wall vent shall not pass through any attic, interior
wall, concealed space, or floor.
6- Clearance to combustible material is 6" (152mm) for
single wall vent material except where a listed
clearance thimble is used. Clearance to combustible
material for type B-1 vent or factory-built chimney is
per manufacturer’s instructions. Clearance to
combustible material is 1” on vertical sections of the
concentric vent/adapter/cap kit.
B-Vertical Vents Using Metal Vent Pipe- Commercial
and Residential Installations
7- The vent connector shall be supported without any
dips or sags. Vertical vents shall be supported in
accordance with their listing and manufacturers’
instructions. All horizontal vent connector runs shall
have a slope up to the vertical vent of at least 1/4"
per foot (1mm per 50mm).
These separated combustion unit heaters are listed as
Category I appliances for vertical vent installations.
1-These unit heaters are to be vented with NFPA- or
ANSI- approved chimneys, U.L. listed type B-1 gas
vents, single wall metal pipe, or listed chimney lining
system for gas venting where applicable, as well as
the modifications and limitations listed in figure 2.
Seal single wall vent material according to the
section A-General Recommendations and
Requirements. Air inlet pipe may be single wall
metal pipe or U.L. listed single wall metal flex
connector. A concentric vent/adapter/cap kit as
specified in these instructions may be used for
vertical termination. Refer to table 3.
8- All vertical type B-1 vents, single wall vents, or listed
chimney lining system must be terminated with a
listed vent cap or listed roof assembly.
9- The vent must extend at least 3' (1m) above the
highest point where it passes through a roof of a
building and at least 2’ (0.6m) higher than any part
of a building within a horizontal distance of 10'
(3.05m) unless otherwise specified by the
(American) National Fuel Gas Code, ANSI Z223.1
or (Canada) CSA-B149 Installation Codes. The vent
must extend at least 5' (1.6m) above the highest
connected equipment flue collar.
2- The vent connector shall be 3" (76mm) diameter on
45 units, 4" (100mm) diameter on 60/75 units, and
5” (127mm) on 100/125 units. The air inlet pipe shall
Page 5
VENT AND AIR INTAKE TERMINATION ON SINGLE WALL VENT
DOUBLE WALL (TYPE B-1) TERMINATION
SINGLE WALL TERMINATION
ROOF FLASHING
ROOF FLASHING
ROOF PITCHED
FROM 0" TO 45"
ROOF PITCHED
FROM 0" TO 45"
12" MAX
CLEARANCE TO BE
AS SPECIFIED ON
TYPE “B" VENT PIPE.
2" CLEARANCE
THIMBLE
SHALL NOT BE A
CONCEALED SPACE
SEAL JOINT BETWEEN SINGLE WALL VENT AND “B"
VENT AND THE ANNULAR SPACE OF THE “B" VENT.
FIGURE 2
used as an alternative to the thimble. When using a
type B-1 vent termination use the clearances specified
by the vent manufacturer. Seal the connection
between the single wall and double wall pipes and the
annular space of the double wall pipe as shown in
figure 2. Inside edge of vent termination tee or
Belmont cap must be at least 12 inches from outside
wall as shown in figure 3.
C-Horizontal Venting - General
Common venting is not allowed with horizontal vent.
The minimum horizontal vent length is three feet (914mm).
1- If possible, do not terminate the horizontal vent
through a wall that is exposed to prevailing wind.
Exposure to excessive winds can affect unit
performance. If such a termination is necessary, use a
wind block to protect the vent termination from direct
winds.
2- Vent termination must be free from obstructions and at
least 12" (306mm) above grade level and maximum
snow height.
3- Do not terminate vent directly below roof eaves or
above a walkway, or any other area where condensate
dripping may be troublesome and may cause some
staining. Avoid windows where steam may cause
fogging or ice buildup.
4- When horizontally vented, minimum clearance for
termination from any door, window, gravity air inlet,
gas or electric meter, regulators, and relief equipment
is 4 ft. (1.2m) for U.S. installations. Refer to NFPA
54/ANSI Z223.1 in the U.S.A. and CSA B149.1 and .2
in Canada or with authorities having local jurisdiction.
In Canada, vent termination must have a minimum 6
ft. (1.8mm) horizontal clearance from gas and electric
meters and relief devices as specified in the Canadian
B149.1, Natural Gas Installation Code.
9- All horizontal vents must terminate with a tee or with a
cap as specified in table 4. Opening end of tee used
for termination must face downward. Addition of ¼”
(6mm) mesh corrosion resistant material as a bird
screen in the tee or cap openings may be used.
9- For horizontal venting, the vent pipe shall be
supported with hangers no more than 3ft. (1m) apart
to prevent movement after installation.
10-Clearance to combustible material is 6" (152mm) for
single wall vent material except where a listed
clearance thimble is used. Clearance to combustible
material for type B-1 vent or factory-built chimney is
per manufacturer’s instructions. Clearance to
combustible material is 1” at the sides, 1” below, and
3” above on horizontal installations of the concentric
vent/adapter/cap kit
D-Horizontal Venting-Commercial
1- Horizontal commercial installations are for buildings
that are not attached to living spaces. The vent may
be single wall vent material installed according to
5- Vent termination must be a minimum of 4' (1.2m)
below or 4’ (1.2m) horizontally from any soffit vent or
under-eave vent.
the
sections
Venting
A-General
Recommendations and Requirements and C-
Horizontal Venting - General and D-Horizontal
Venting - Commercial. Refer to figures 3, 4, and 5.
The air inlet may be single wall vent material or U.L.
listed single wall flex connector.
6- Vent must be a minimum of 6' from an inside corner
formed by two exterior walls. If possible, leave a 10'
clearance.
7- Vent termination must be a minimum of 10' (3m) from
any forced air inlet (includes fresh air inlet for other
appliances, such as a dryer).
8- When termination is routed through an exterior
combustible wall the vent must be supported using a
listed clearance thimble. Where local authorities
permit, a single section of type B-1 vent pipe may be
2- Refer to table 2 for maximum vent lengths. The vent
pipe diameter for horizontal commercial installations
shall be 3” (76mm) on 45 units, 4” (100mm) on
60/75 units, 5” (127mm)on 100/125 units.
Page 6
stainless steel. Seal single wall vent material
3- The air inlet diameter shall be 3” (76mm) on
45/60/75 units and 4” (100mm) on 100/125 units.
Refer to table 4 for diameter and termination
requirements.
4- Select a wall termination point that will maintain ¼”
rise per foot slope of horizontal run of vent pipe.
The vent may be single wall material minimum 26
GSG (0.46mm) galvanized steel or equivalent grade
stainless steel. Seal single wall vent material
according
Recommendations
to
the
section
and
A-General
Requirements.
Condensate drainage can be collected in a tee pipe
section (figure 4) or allowed to drip through the vent
termination, if permitted by local authorities (figure
5).
5- For upward sloped vent a condensate tee and drain
must be installed within the first 5’ (1.5m) from the
unit heater to protect the appliance. If a flexible
condensate drain line is used, the drain line must
according
to
the
section
A-General
Recommendations and Requirements. In areas
where local authorities having jurisdiction permit, a
downward slope of maximum ¼” per foot is also
acceptable. In such cases, the vent must be listed
special vent for Category III appliances or single
wall vent pipe constructed of number 26 GSG
(0.46mm) galvanized steel or equivalent grade
include
a
loop filled with water to prevent
combustion products from entering the structure. If
the unit is shut down for an extended period of time
and will be exposed to sub-freezing temperatures,
the condensate may freeze.
CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP
UPWARD SLOPE ON HORIZONTAL VENT-COMMERCIAL INSTALLATION
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO
THESE INSTALLATION INSTRUCTIONS. SLOPE:+ 1/4 INCH FOR 1 FOOT RUN MINIMUM.
12” (30.5 CM) MIN. FROM WALL TO
VENT TERMINATION
VENT TERMINATION
(TERMINATIONS MAY
USE WIRE MESH BIRD
SCREEN)
12” (30.5 CM) MIN. FROM
AIR INLET TO VENT
TERMINATION (MAY
BE HORIZONTAL OR
VERTICAL CLEARANCE)
LISTED THIMBLE
THROUGH
COMBUSTIBLE WALL
12” (30.5 CM) MINIMUM ABOVE
HIGHEST SNOWFALL
AIR INLET
TERMINATION
DRAIN LOOP WITH WATER
TRAP (TO CONDENSATE DRAIN)
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (91.4 CM) NOT
INCLUDING TERMINATION. REFER TO TABLE 2 FOR
MAXIMUM LENGTH AND NUMBER OF ELBOWS.
GROUND LEVEL
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 3
Venting Concentric Kit - Commercial. The air inlet
may be single wall material or U.L. listed single wall
flex vent connector.
E-Horizontal Venting Concentric Kit - Commercial
1-Horizontal commercial installations are for buildings
that are not attached to living spaces. The only
concentric vent/adapter/cap kit that may be used is
the kit supplied by Lennox Industries. The kit may be
used with 45/60/75 units. The vent used to connect
from the concentric adapter to the unit may be single
wall material minimum 25 GSG (0.46mm)
galvanized steel or equivalent grade stainless steel
installed according to the sections Venting A-
General Recommendations and Requirements
and C-Horizontal Venting General and D-
Horizontal Venting–Commercial and E-Horizontal
2-The vent pipe diameter for horizontal commercial
installations shall be 3” (76mm) on 45 units and 4”
(100mm) on 60/75 units. Refer to table 4.
3-Refer to table 2 for maximum vent lengths.
4-Refer to figure 7 for kit termination, figure 3 for
upward slope with condensate trap, figure 4 for
downward slope with trap, and figure 5 for
downward slope with condensate drain through cap
where permitted by local authorities.
Page 7
CONDENSATE DRAIN THROUGH TEE PIPE AND DRAIN LOOP
DOWNWARD SLOPE ON HORIZONTAL VENT-COMMERCIAL INSTALLATION
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO
THESE INSTALLATION INSTRUCTIONS. SLOPE: - 1/4 INCH FOR 1 FOOT RUN MINIMUM.
12” (30.5 CM) MIN. FROM WALL TO
VENT TERMINATION
AIR INLET
TERMINATION
VENT TERMINATION
12” (30.5 CM) MIN. FROM
AIR INLET TO VENT
TERMINATION (MAY
BE HORIZONTAL OR
VERTICAL CLEARANCE)
LISTED THIMBLE
THROUGH
COMBUSTIBLE WALL
DRAIN LOOP WITH WATER
TRAP (TO CONDENSATE DRAIN)
12” (30.5 CM) MINIMUM ABOVE
HIGHEST SNOWFALL
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (91.4 CM) NOT
INCLUDING TERMINATION. REFER TO TABLE 2 FOR
MAXIMUM LENGTH AND NUMBER OF ELBOWS.
(TERMINATIONS MAY
USE WIRE MESH BIRD
SCREEN)
GROUND LEVEL
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 4
CONDENSATE DRAIN THROUGH VENT TERMINATION
DOWNWARD SLOPE ON HORIZONTAL VENT-COMMERCIAL INSTALLATION
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO
THESE INSTALLATION INSTRUCTIONS. SLOPE: - 1/4 INCH FOR 1 FOOT RUN MINIMUM.
12” (30.5 CM) MIN. FROM WALL TO
VENT TERMINATION
AIR INLET
TERMINATION
VENT TERMINATION
12” (30.5 CM) MIN. FROM
AIR INLET TO VENT
TERMINATION (MAY
BE HORIZONTAL OR
VERTICAL CLEARANCE)
LISTED THIMBLE
THROUGH
COMBUSTIBLE WALL
12” (30.5 CM) MINIMUM ABOVE
HIGHEST SNOWFALL
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (91.4 CM) NOT
INCLUDING TERMINATION. REFER TO TABLE 2 FOR
MAXIMUM LENGTH AND NUMBER OF ELBOWS.
(TERMINATIONS MAY
USE WIRE MESH BIRD
SCREEN)
GROUND LEVEL
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 5
Page 8
TABLE 3
VERTICAL VENT REQUIREMENTS
MODEL
45
INSTALLATION
FLUE TYPE
AIR INLET TYPE
FLUE
DIA.
AIR
INLET
DIA.
VENT CAP
OTHER
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
RESIDENTIAL
COMMERCIAL
or
SINGLE WALL
3”
3”
3”
4”
4”
4”
5”
5”
5”
3”
3”
3”
4”
4”
4”
4”
4”
4”
U.L. APPROVED
U.L. APPROVED
MAY USE ONE
SECTION OF B-
VENT
SINGLE WALL or
METAL FLEX VENT
TYPE B VENT
SINGLE WALL or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL or
METAL FLEX VENT
SINGLE WALL
SINGLE WALL or
METAL FLEX VENT
TYPE B VENT
SINGLE WALL or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL or
METAL FLEX VENT
SINGLE WALL
SINGLE WALL or
METAL FLEX VENT
TYPE B VENT
SINGLE WALL or
METAL FLEX VENT
CONCENTRIC
45
45
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
60, 75
60, 75
60, 75
100, 125
100, 125
100, 125
U.L. APPROVED
MAY USE ONE
SECTION OF B-
VENT
U.L. APPROVED
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
U.L. APPROVED
MAY USE ONE
SECTION OF B-
VENT
U.L. APPROVED
5” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
SINGLE WALL or
METAL FLEX VENT
RESIDENTIAL
HORIZONTAL VENTING - RESIDENTIAL INSTALLATION
UPWARD SLOPE
MAY BE SINGLE WALL (26 GSG) GALV. OR EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION
INSTRUCTIONS OR A SINGLE SECTION OF TYPE B-1 VENT. SLOPE:+ 1/4 INCH FOR 1 FOOT RUN MINIMUM.
12” (30.5 CM) MIN. FROM WALL TO
VENT TERMINATION
VENT TERMINATION
(TERMINATIONS MAY
USE WIRE MESH BIRD
SCREEN)
12” (30.5 CM) MIN. FROM
AIR INLET TO VENT
TERMINATION (MAY
BE HORIZONTAL OR
VERTICAL CLEARANCE)
LISTED THIMBLE
THROUGH
COMBUSTIBLE WALL
12” (30.5 CM) MINIMUM ABOVE
HIGHEST SNOWFALL
AIR INLET
TERMINATION
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (91.4 CM) NOT
INCLUDING TERMINATION. MAXIMUM HORIZONTAL VENT
LENGTH 5 FT. (1.5M) PLUS ONE 90-DEGREE ELBOW.
GROUND LEVEL
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 6
Page 9
F-Horizontal Venting-Residential Two Pipes
1-For horizontal residential installations these units are
certified as Category I appliances. The vent may be
single wall material minimum 25 GSG (0.46mm)
galvanized steel or equivalent grade stainless steel or
a single section of type B-1 vent installed according to
the sections Venting A-General Recommendations
and Requirements and C-Horizontal Venting
General and F-Horizontal Venting–Residential Two
Pipes. Refer to figure 6.
2-The vent pipe diameter for horizontal residential
installations shall be 4” (100mm) on 45 units and 5”
(127mm) on 60/75/100/125 units. Refer to table 4 for
vent diameter and termination requirements.
3-The maximum vent length is 5’ (1.5m) plus one 90-
degree elbow.
4-The vent must maintain a ¼” rise per foot of slope
upwards toward the termination
TABLE 4
HORIZONTAL VENT REQUIREMENTS
MODEL
45
INSTALLATION
RESIDENTIAL
FLUE TYPE
AIR INLET TYPE
FLUE DIA.
INLET AIR
DIA.
VENT CAP
INLET AIR CAP
MAX. VENT
LENGTH (MIN.
VENT LENGTH 3’)
SINGLE WALL
4”
TEE or
4” BELMONT
TEE or
3” BELMONT
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
TEE or
3” BELMONT
TEE or
3” BELMONT
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
5’ MAY USE ONE
SECTION OF
B-VENT
SINGLE WALL PIPE or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL PIPE or
METAL FLEX VENT
SINGLE WALL
3”
45
45
RESIDENTIAL
COMMERCIAL
4”
3”
5’
3”
3”
25’ MAY USE ONE
SECTION OF
B-VENT
SINGLE WALL PIPE or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL PIPE or
METAL FLEX VENT
45
COMMERCIAL
RESIDENTIAL
3”
3”
25’
60, 75
SINGLE WALL
5”
4”
TEE or
5” BELMONT
TEE or
4” BELMONT
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
TEE or
4” BELMONT
TEE or
4” BELMONT
4” CONCENTRIC
VENT/ ADAPTER/CAP
KIT REQUIRED
5’ MAY USE ONE
SECTION OF
B-VENT
SINGLE WALL PIPE or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL PIPE or
METAL FLEX VENT
SINGLE WALL
60, 75
60, 75
RESIDENTIAL
COMMERCIAL
4”
4”
5’
4”
4”
25’ MAY USE ONE
SECTION OF B-
VENT
SINGLE WALL PIPE or
METAL FLEX VENT
CONCENTRIC
SINGLE WALL PIPE or
METAL FLEX VENT
60, 75
COMMERCIAL
RESIDENTIAL
4”
4”
25’
100, 125
SINGLE WALL
5”
4”
5”
4”
TEE or
5” BELMONT
TEE or
4” BELMONT
TEE or
5” BELMONT
TEE or
5’ MAY USE ONE
SECTION OF
B-VENT
SINGLE WALL PIPE or
METAL FLEX VENT
SINGLE WALL
100, 125
COMMERCIAL
5’ MAY USE ONE
SECTION OF
B-VENT
SINGLE WALL PIPE or
METAL FLEX VENT
4” BELMONT
Page 10
and G - Horizontal Venting Concentric Kit -
Residential. Refer to figure 7. The air inlet may be
single wall material or U.L. listed single wall flex vent
connector.
G-Horizontal Venting Concentric Kit - Residential
1-For horizontal residential installations the 45/60/75
units are certified as Category I appliances with a
concentric vent/adapter/cap kit. The only concentric
vent/adapter/cap kits that may be used are the kits
supplied by Advanced Distributor Products. The vent
used to connect from the concentric adapter to the
unit may be single wall material minimum 25 GSG
(0.46mm) galvanized steel or equivalent grade
stainless steel installed according to the sections
Venting A - General Recommendations and
Requirements and C - Horizontal Venting General
2-The vent pipe diameter for horizontal residential
installations shall be 4” (100mm) on 45/60/75 units.
Refer to table 4.
3-The maximum vent length is 5’ (1.5m) plus one 90-
degree elbow.
4-The vent must maintain a ¼” rise per foot of slope
upwards toward the termination.
HORIZONTAL VENTING – CONCENTRIC VENT INSTALLATION
VENT AND AIR INLET CONNECTORS FROM UNIT TO CONCENTRIC ADAPTER MAY BE SINGLE WALL (26 GSG) GALV. OR
EQUIVALENT STAINLESS STEEL SEALED ACCORDING TO THESE INSTALLATION INSTRUCTIONS. SLOPE VENT + 1/4 INCH
FOR 1 FOOT RUN MINIMUM. AIR INLET MAY ALSO BE U.L. LISTED SINGLE WALL FLEX VENT CONNECTOR.
VENT TERMINATION
AND AIR INLET
TERMINATION
LISTED THIMBLE
THROUGH
COMBUSTIBLE WALL
12” (30.5 CM) MINIMUM ABOVE
HIGHEST SNOWFALL
NOTE - MINIMUM HORIZONTAL LENGTH 3 FT. (91.4 CM) NOT
INCLUDING TERMINATION.
GROUND LEVEL
COMMON VENTING NOT ALLOWED WHEN HORIZONTALLY VENTING THE UNIT HEATER.
FIGURE 7
H-Removal Of Unit From Common Vent
3- In so far as is practical, close all building doors and
windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on clothes dryers and any appliances
not connected to the common venting system. Turn
on any exhaust fans, such as range hoods and
bathroom exhausts, so they will operate at maximum
speed. Do not operate a summer exhaust fan. Close
fireplace dampers.
In the event that an existing unit heater is removed from
a venting system commonly run with separate gas
appliances, the venting system is likely to be too large to
properly vent the remaining attached appliances. The
following test should be conducted while each appliance
is in operation and the other appliances are not in
operation, yet remain connected to the common venting
system. If the venting system has been installed
improperly, the system must be corrected.
4- Follow the lighting instructions. Place the appliance
being inspected in operation. Adjust thermostat so
appliance will operate continuously.
5- Test for spillage at the draft hood relief opening after
five minutes of main burner operation. Use the flame
of a match or candle, or smoke from a cigarette,
cigar, or pipe.
1- Seal any unused openings in the common venting
system.
2- Visually inspect the venting system for proper size
and horizontal pitch. Determine there is no blockage
or restriction, leakage, corrosion, or other
deficiencies which could cause an unsafe condition.
Page 11
Electrically ground unit in accordance with local codes
or, in the absence of local codes, in accordance with the
current National Electrical Code (ANSI/NFPA No. 70) in
the U.S.A., and in Canada with the current Canadian
Electrical Code, Part 1 (CSA C22.1).
6- After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers
and any other gas-burning appliance to their
previous condition of use.
Make line voltage connections as shown in figure 8.
Connect field wiring as shown on wiring diagram on
unit. Also refer to typical diagram in this manual. An
additional thermostat wire must be run to terminal “G"
on heater when continuous blower is desired.
7- If improper venting is observed during any of the
above tests, the common venting system must be
corrected. The common venting system should be
resized to approach the minimum size as
determined by using the appropriate tables in
Appendix G in the current standards of the National
Fuel Gas Code, ANSI Z223-1 in the U.S.A. and the
appropriate Category I Natural Gas and Propane
appliances venting sizing tables in the current
standards of the CSA-B149.1 and .2 in the Natural
Gas and Propane Installation Code in Canada.
LINE VOLTAGE FIELD WIRING
UNIT ELECTRICAL BOX
L1
BLACK
NOTE - Local codes may supersede any of the above
provisions.
N
WHITE
Electrical Connections
NOTE - These unit heaters use a direct spark ignition
system. There is no pilot necessary as the spark lights
the main burner as the gas valve is turned on. The direct
spark ignition control board emits radio noise as the
sparking process is underway. The level of energy may
be sufficient to disturb a logic circuit in a microprocessor
controlled thermostat. It is recommended that an
isolation relay be used when connecting the unit heaters
to a microprocessor controlled thermostat. Install the
thermostat according to instructions provided. Select
circuit protection and wire size according to the unit
rating plate. Install a separate disconnect switch
(protected by either fuse or circuit breaker) near the unit
so that power can be turned off for servicing. Connect
wiring through knockout on the junction box located on
the side of the unit heater. Refer to heater wiring
diagram for connection information. Use 18 gauge wire
or larger for thermostat connections.
FIGURE 8
Page 12
Gas Connection
Leak Check
When connecting gas supply, the length of the run from
the meter must be considered in determining the pipe
size. A line pressure of 7" w.c. (1.74 kPa) for natural gas
should be maintained when sizing piping. A line pressure
of 13” w.c. (3.23 kPa) should be maintained for liquefied
petroleum (LP) gas. A minimum of 5.0" w.c. for natural
gas or 10.4" w.c. for LP/propane gas should be
maintained for proper unit operation. For correct sizing of
piping, refer to the (American) National Fuel Gas Code
ANSI Z223.1 or (Canada) CSA-B149 Installation Code or
consult the utility having jurisdiction.
After gas piping is completed, carefully check all piping
connections, (field and factory), for gas leaks. Use a soap
solution or other preferred means.
CAUTION - DO NOT use matches, candles, flame or
other sources of ignition to check for gas leaks.
IMPORTANT - The heater and its individual shut off valve
must be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2 psig (3.45kPa).
The appliance must be isolated from the gas supply
piping system by closing its individual manual gas shutoff
valve during any pressure testing of the gas supply
system at test pressures equal to or less than 1/2 psig
(3.45kPa). See figure 10.
A drip leg should be installed in the vertical pipe run to the
unit. In some localities, codes may require that a manual
main shutoff valve and union (furnished by installer) be
installed external to the unit. Union must be of the ground
joint type. A drip leg should be readily accessible to permit
cleaning and emptying. See figure 9. Leave a minimum of
4" (102mm) clearance between electric box and drip leg.
NOTE - In case emergency shutdown is required, shut
down main gas valve and disconnect main power to unit.
These devices should be properly labeled by the installer.
A 1/8" NPT plugged tap shall be installed immediately
upstream of the gas supply connection to the heater.
GAS SUPPLY TO UNIT HEATER
NOTE - Compounds used on threaded joints of gas piping
must be resistant to the actions of liquefied petroleum
gases.
MANUAL MAIN SHUT-OFF
VALVE WILL NOT
ISOLATE
GAS VALVE
HOLD NORMAL
TEST PRESSURE
GAS SUPPLY CONNECTION
CAP
UNIT HEATER
FIGURE 10
MANUAL
MAIN SHUT-OFF VALVE
(Furnished by Installer)
GROUND
JOINT UNION
1/8 NPT
PLUGGED TAP
GAS FLOW
DRIP LEG
FIGURE 9
Page 13
START-UP AND OPERATION
Operation for Honeywell VR8205 Series Gas Valve
(Figure 11)
Unit Start-Up
FOR YOUR SAFETY READ BEFORE LIGHTING
1- STOP! Read the safety information at the beginning
of this section.
2- Set thermostat to lowest setting.
WARNING
!
1
HONEYWELL VR8205 SERIES GAS VALVE
Electric shock hazard. Can cause injury
or death. Do not use this heater if any
part has been under water. Immediately
call a qualified service technician to in-
spect the furnace and to replace any part
of the control system and any gas con-
trol which has been under water.
MANIFOLD PRESSURE ADJUSTMENT SCREW
MANI-
FOLD
PRESS-
URE
TAP
! WARNING
ON
Danger of explosion. Can cause injury or
product or property damage. If over-
heating occurs or if gas supply fails to
shut off, shut off the manual gas valve to
the appliance before shutting off electri-
cal supply.
OFF
INLET
PRESSURE
TAP
GAS VALVE SHOWN IN OFF POSITION
!
WARNING
FIGURE 11
3-Turn off all electrical power to appliance.
4-This appliance is equipped with an ignition device
which automatically lights burners. DO NOT
attempt to light the burners manually.
5-Turn the manual knob on gas valve clockwise to
OFF. Do not force.
6-Wait five (5) minutes to clear out any gas. If you
then smell gas, STOP! Immediately call your
gas supplier from a neighbor's phone. Follow the
gas supplier's instructions. If you do not smell
gas, go to next step.
Electric shock hazard. Can cause injury or
death. Before attempting to perform any
service or maintenance, turn the electrical
power to unit OFF at disconnect switch(es).
Unit may have multiple power supplies.
WARNING
!
Danger of explosion and fire. Can cause
injury or product or property damage. You
must follow these instructions exactly.
BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
7-Turn manual knob on gas valve counterclockwise
to ON.
8-Close the unit door.
Use only your hand to push in or turn the gas control
knob. Never use tools. If the knob will not push in or turn
by hand, do not try to repair it, call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.
9-Turn on all electric power to unit.
10- Set thermostat to desired setting.
11- The combustion air blower will start. The burners
will light within 40 seconds.
12- If unit does not light first time (gas line not fully
purged) it will attempt up to two more ignitions
before locking out.
13- If lockout occurs, repeat steps 1 through 10.
14- If appliance still will not operate, follow the
instructions “To Turn Off Gas to Unit" and call
your service technician or gas supplier.
These unit heaters are equipped with an automatic
spark ignition system. There is no pilot. In case of a
safety shutdown, move thermostat switch to OFF, then
return the thermostat switch to HEAT position.
Page14
Gas Valve Operation for White Rodgers 36E Series
Valve (Figure 12)
Gas Valve Operation for Robertshaw 2000DER
Series Valve (Figure 13)
1- STOP! Read the safety information at the beginning
1- STOP! Read the safety information at the beginning
of this section.
of this section.
2- Set thermostat to lowest setting.
2- Set the thermostat to lowest setting.
3- Turn off all electrical power to appliance.
3- Turn off all electrical power to appliance.
4- This appliance is equipped with an ignition device
4- This appliance is equipped with an ignition device
which automatically lights burner. DO NOT attempt
to light the burners manually.
which automatically lights burner.
DO NOT
attempt to light the burners manually.
WHITE RODGERS 36E GAS VALVE
ROBERTSHAW 2000DER GAS VALVE
MANIFOLD
PRESSURE TAP
GAS VALVE KNOB
SHOWN IN OFF POSITION
MANIFOLD PRESSURE
ADJUSTMENT SCREW
OFF
NO
OFF
MANI-
FOLD
PRESSURE
TAP
INLET
PRESSURE
TAP
GAS VALVE KNOB
SHOWN IN OFF POSITION
INLET
PRESSURE
TAP
MANIFOLD PRESSURE
ADJUSTMENT SCREW
UNDER CAP
FIGURE 12
FIGURE 13
5- Turn knob on gas valve 180° either way to OFF.
5- Depress knob on gas valve; knob will snap to OFF.
6- Wait five minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas
supplier from a neighbor's phone. Follow the gas
supplier's instructions. If you do not smell gas go to
next step.
6- Wait five minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas
supplier from a neighbor’s phone. Follow the gas
supplier’s instructions. If you do not smell gas go
to next step.
7- Turn knob on gas valve 180° either way to ON.
8- Close unit door.
7- Turn knob on gas valve 90° counterclockwise to
ON.
9- Turn on electrical power to unit.
10-Set thermostat to desired setting.
8- Close unit door.
9- Turn on electrical power to unit.
10-Set the thermostat to desired setting.
11- The combustion air blower will start. The burners
will light within 40 seconds.
11-The combustion air blower will start. The burners
will light within 40 seconds.
12-If unit does not light first time (gas line not fully
purged) it will attempt up to two more ignitions
before locking out.
12-If unit does not light first time (gas line not fully
purged) it will attempt up to two more ignitions
before locking out.
13-If lockout occurs, repeat steps 1 through 10.
14-If appliance still will not operate, follow the
instructions “To Turn Off Gas to Unit" and call
your service technician or gas supplier.
13-If lockout occurs, repeat steps 1 through 10.
14-If appliance still will not operate, follow the
instructions “To Turn Off Gas to Unit" and call
your service technician or gas supplier.
Page 15
Ignition Control LED
To Turn Off Gas To Unit
The ignition control board contains a green LED which
indicates the following:
1- Set thermostat to lowest level.
2- Turn off all electrical power to unit if service is to be
performed.
TABLE 5
IGNITION CONTROL LED
3- Honeywell VR8205 series valve: turn knob on gas
LED
UNIT OPERATION
valve 90° clockwise
to OFF.
Slow
Flash*
Normal Operation - No call for heat
White Rodgers 36E series valves: turn knob on gas
valve 180° either way to OFF.
Fast
Flash
Normal Operation - Call for heat
Current signal at FLAME terminal 0.6 to 1.0 microamps
Robertshaw DER2000 series valves: depress knob
on gas valve; knob will snap to OFF.
2 Flashes
System lockout - failed to detect or sustain flame
Current signal at FLAME terminal <0.6 microamps
Heating Sequence of Operation
3 Flashes
Combustion air inducer proving switch failed closed
before CAB is energized or failed open after CAB is
energized
1- When the thermostat calls for heat, the combustion
air blower starts immediately.
4 Flashes
5 Flashes
High limit or rollout switch open
Flame sensed and gas valve not energized
Loss of power
2- Combustion air inducer proving switch proves
blower operation before allowing power to the
ignition controller. This switch is factory set and no
adjustment is necessary.
Steady
Off
Steady
On
Ignition control failure
3- After prepurge of approximately 30 seconds, the
spark ignition is energized and the solenoid valves
open in the gas valve.
*When thermostat is placed in continuous fan mode LED will
slowly flash.
4- The spark then ignites the gas, the ignition sensor
proves the flame and the combustion process
continues.
Optional Gas Conversion Kit
5- In the event that the flame is not detected after the
first 10-second trial for ignition, the controller will
repeat steps 3 and 4 an additional two times before
locking out the gas valve. Ignition control will then
automatically repeat steps 3, 4, and 5 after 60
minutes.
A natural to LP/propane gas changeover kit is required
to convert unit. Refer to the installation instructions
supplied with the changeover kit for conversion
procedure.
To interrupt the 60-minute lockout period, move
thermostat from “Heat" to “OFF" then back to
“Heat." Heating sequence then restarts at step 1.
6- The burners shall light without noticeable crossover
delay. There shall be no flame lifting from the burner
heads, flashback or burning within the burner. The
flames shall be predominantly blue in color and
shall be approximately centered in the tubes with no
apparent impingement taking place.
7- The ignition control will energize the fan
approximately 45 seconds after ignition is
established.
8- After the thermostat demand is satisfied the gas
valve is closed; 5 seconds after the demand is
satisfied the combustion air blower is shut off.
9- The control center shall shut off the system fan
approximately 120 seconds after the gas valve is
de-energized.
Page 16
ADJUSTMENTS
Limit Control
High Altitude
Units may be fired at full input up to 2000 ft. (610m)
above sea level. Above 2000 ft. (610m), manifold
pressure must be reduced by 4 percent for each 1000
feet above sea level or as specified by local authority
having jurisdiction. Adjust pressure regulator to
pressure shown in table 6 for natural gas and table 7
for LP/propane gas. The combustion air blower proving
switch is factory set. No adjustment is necessary.
The limit control switch is factory set and not field
adjustable.
Louver Vane Adjustment
Rotate louver vanes to direct airflow upward,
downward, straight, or any combination of these
directions.
Combustion Air Inducer Proving Switch
Gas Pressure
This combustion air inducer proving switch checks for
proper combustion air inducer operation before
allowing an ignition trial. The switch is factory set and
no field adjustment is necessary.
Check gas line pressure with unit firing at maximum
rate. A minimum of 5.0" w.c. for natural gas or 10.4"
w.c. for LP/propane gas should be maintained for
proper unit operation. After line pressure has been
checked and adjusted, check manifold pressure.
Correct manifold pressure is shown on the unit rating
plate. See figures 11, 12 and 13 for gas pressure
adjustment screw location. A natural gas to LP/propane
gas changeover kit is required to convert unit. Refer to
installation instructions provided with changeover kit for
conversion procedure.
Flame Rollout Switch
The flame rollout switch(es) on 45, 60 or 75 units are
located on the burner box top, behind the ignition
control board. The flame rollout switch on 100 or 125
units is located on the manifold bracket above the top
burner. This normally closed switch opens on a
temperature rise. Check for adequate combustion air
and proper venting before manually resetting switch.
TABLE 6
NATURAL GAS MANIFOLD PRESSURES - in.wg. (kPa)
ALTITUDE FT. (M)
2001-3000
(610-914)
4001-5000
6001-7000
8001-9000
0-2000
(0-610)
3001-4000
5001-6000
7001-8000
9001-10000
MODEL
(1220-1524)
(1829-2134)
(2439-2743)
(915-1219)
2.5 (0.62)
2.5 (0.62)
2.5 (0.62)
2.5 (0.62)
2.5 (0.62)
(1524-1829)
2.0 (0.50)
2.0 (0.50)
2.0 (0.50)
2.0 (0.50)
2.0 (0.50)
(2134-2438)
1.6 (0.40)
1.6 (0.40)
1.6 (0.40)
1.6 (0.40)
1.6 (0.40)
(2744-3048)
1.3 (0.32)
1.3 (0.32)
1.3 (0.32)
1.3 (0.32)
1.3 (0.32)
TUA045SN 3.5 (0.87)*
TUA060SN 3.5 (0.87)*
TUA075SN 3.5 (0.87)*
TUA100SN 3.5 (0.87)*
TUA125SN 3.5 (0.87)*
2.7 (0.67)
2.7 (0.67)
2.7 (0.67)
2.7 (0.67)
2.7 (0.67)
2.2 (0.55)
2.2 (0.55)
2.2 (0.55)
2.2 (0.55)
2.2 (0.55)
1.8 (0.45)
1.8 (0.45)
1.8 (0.45)
1.8 (0.45)
1.8 (0.45)
1.4 (0.35)
1.4 (0.35)
1.4 (0.35)
1.4 (0.35)
1.4 (0.35)
*No adjustment required.
Page 17
TABLE 7
LP/PROPANE GAS MANIFOLD PRESSURES - in.wg. (kPa )
ALTITUDE FT. (M)
2001-3000
(610-914)
4001-5000
6001-7000
8001-9000
0-2000
(0-610)
3001-4000
(915-1219)
5001-6000
7001-8000
9001-10000
(2744-3048)
MODEL
(1220-1524)
(1829-2134)
(2439-2743)
(1524-1829)
(2134-2438)
TUA045SL
TUA060SL
TUA075SL
TUA100SL
TUA125SL
9.5 (2.37)*
9.5 (2.37)*
9.5 (2.37)*
9.0 (2.24)*
9.0 (2.24)*
7.4 (1.84)
7.4 (1.84)
7.4 (1.84)
7.0 (1.74)
7.0 (1.74)
6.7 (1.67)
6.7 (1.67)
6.7 (1.67)
6.4 (1.59)
6.4 (1.59)
6.1 (1.52)
6.1 (1.52)
6.1 (1.52)
5.8 (1.44)
5.8 (1.44)
5.5 (1.37)
5.5 (1.37)
5.5 (1.37)
5.2 (1.30)
5.2 (1.30)
4.9 (1.22)
4.9 (1.22)
4.9 (1.22)
4.7 (1.17)
4.7 (1.17)
4.4 (1.10)
4.4 (1.10)
4.4 (1.10)
4.2 (1.05)
4.2 (1.05)
3.9 (0.97)
3.9 (0.97)
3.9 (0.97)
3.7 (0.92)
3.7 (0.92)
3.4 (0.85)
3.4 (0.85)
3.4 (0.85)
3.2 (0.80)
3.2 (0.80)
*No adjustment required.
TABLE 8
Gas Flow Rate (Ft.3/Hr.)
Gas Flow
Seconds for 1
Gas Meter Size
Revolution
10
½ cu ft Dial
180
150
129
113
100
90
1 cu ft Dial
Check for proper gas flow to the unit heater.
360
300
257
225
200
180
164
150
1. Operate unit at least 15 minutes before checking
gas flow. Determine the time in seconds for one
revolution of gas through the meter.
2. Compare the number of seconds and the gas
meter size in table 8 to determine the gas flow rate.
Multiply the gas flow rate by the heating value to
determine the unit input rate. If manifold pressure is
correct and the unit input rate is incorrect, check
gas orifices for proper size and restriction.
12
14
16
18
20
22
24
26
82
75
69
64
138
129
3. Remove temporary gas meter if installed.
28
30
32
34
60
56
53
120
113
106
NOTE – To obtain accurate reading, shut off all other
gas appliances connected to meter.
36
50
100
38
47
95
40
45
90
42
43
86
44
41
82
46
39
78
48
38
75
50
36
72
52
35
69
54
33
67
56
32
64
58
60
31
30
62
60
Natural = 1000 btu/cu ft
LP = 2500 btu/cu ft
Note: Table assumes standard temperature (60°F), barometric
pressure (30 in Hg), and fuel heating values (btu/cu ft). Fuel heating
values may vary, contact local fuel supplier to obtain actual heating
value of fuel being supplied.
Page 18
SERVICE
CAUTION - Turn off gas and electrical power to unit
Combustion Air Blower
before performing any maintenance or service
operations on this unit. Remember to follow lighting
instructions when putting unit back into operation after
service or maintenance.
Under normal operating conditions, the combustion air
blower should be checked and cleaned prior to the
heating season with the power supply disconnected.
Use a small brush to clean blower wheel.
Burners
Electrical
1- Periodically examine burner flames for proper
appearance during the heating season.
2- Before each heating season examine the burners
for any deposits or blockage that may have
occurred.
1- Check all wiring for loose connections.
2- Check for correct voltage at unit (unit operating).
3- Check amperage draw.
Flue and Air Inlet
3- Clean burners as follows:
a-Turn off both electrical and gas supplies to unit.
b-Disconnect gas supply piping, high tension and
sensor leads. Remove gas manifold. Remove
burner tray.
c-Clean burners as necessary. Make sure that
burner heads line up properly to ensure flame
crossover. Check spark gap on electrode and
adjust if required. The gap should be between
0.110 inch and 0.140 inch (2.79mm to 3.56mm).
The gap may be checked with appropriately sized
twist drills or feeler gauges.
Check all vent and air inlet joints for tightness. Ensure
that connections are sealed and that there are no
blockages.
Failure to Operate
If unit fails to operate check the following:
1- Is thermostat calling for heat?
2- Is main disconnect closed?
3- Is there a breaker tripped or a fuse blown?
4- Is gas turned on at meter?
5- Is manual shutoff valve open?
d-Reinstall burner tray, gas manifold, high tension
and sensor leads. Reconnect gas supply piping.
e-Restore electrical power and gas supply. Follow
lighting instructions to light unit. Check burner
flame.
6- Is unit ignition system in lock out? If unit locks out
again, call service technician to inspect unit.
7- Is combustion air inducer proving switch closed?
Obstructed flue will cause unit to shut off at
combustion air inducer proving switch. Check flue
passage and outlet.
Flue Passageway and Flue Box
Repair Parts
The flue passages and flue box should be inspected
and cleaned prior to each heating season. The
sequence of operation should be as follows:
1- Turn off both electrical and gas supply to unit.
2- Disconnect combustion air blower wiring.
3- Remove screws securing flue box to unit. Remove
flue box. If necessary, remove blower assembly
from flue box. Clean flue box with wire brush.
4- Remove turbulator retention bracket and
turbulators. Clean turbulators with wire brush.
5- Remove burners as described in section “Burners"
section.
When ordering repair parts include the complete unit
model number listed on the unit rating plate. For
example: TUA045SNAF1.
6- Clean tubes with a wire brush.
7- Reassemble unit. The combustion air and flue box
gaskets should also be replaced during
reassembly.
8- Restore electrical power and gas supply. Follow
lighting instructions to light unit. Check operation of
unit.
Page 19
MAXIMUM LOAD NOT TO
EXCEED 20 VA AT 24 V CLASS 2.
(2)S47 USED ON 60 & 75 MODELS
ONLY.
DISCONNECT ALL POWER
BEFORE SERVICING.
BLUE
FOR PROPER GROUNDING
REFER TO LOCAL CODES.
BROWN
RED
ORANGE
BLUE
YELLOW
BLUE
GREEN/YELLOW
DESCRIPTION
WIRING DIAGRAM
6/03
KEY
A3
B3
COMPONENT
CONTROL, BURNER, IGNITION
MOTOR, BLOWER
HEATING UNITS ˘ GAS GCI−3A
B6
GV1
S10
MOTOR, COMBUSTION AIR BLOWER
VALVE, GAS
LIMIT, PRIMARY GAS
TUA45/60/75/100/125S(N,L(A,S)F
S18
SWITCH, COMB. AIR INDUCER PROVE
SWITCH, FLAME ROLLOUT 1
SWITCH, FLAME ROLLOUT 2
SWITCH, LOW GAS PRESSURE
TRANSFORMER, CONTROL
SWITCH, DOOR
(1)S47
(2)S47
S43
T1
Supersedes Form No.
New Form No.
065329500
DS
Page 20
|