INSTALLATION INSTRUCTIONS AND PARTS IDENTIFICATION
HIGH EFFICIENCY GAS-FIRED PROPELLER UNIT HEATERS
ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE ATTEMPTING
TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS AND
ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT THE POINT OF
INSTALLATION. RECORD THE UNIT MODEL AND SERIAL No. (s) IN THE SPACE PROVIDED. RETAIN FOR FUTURE
REFERENCE.
NXIM-2
J30-09590
Unit No.
Serial No.
FOR YOUR SAFETY
The use and storage of gasoline or other ammable vapors and liquids in open containers in
the vicinity of this appliance is hazardous.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open ame.
4. Immediately contact your gas supplier.
Improper installation, adjustment, alteration, service, or maintenance
can cause property damage, injury, or death. Read the installation, operating, and
maintenance instruction thoroughly before installing or servicing this equipment.
APPROVED FOR USE IN CALIFORNIA
APPROVED FOR USE IN CALIFORNIA
Install, operate, and maintain unit in accordance with the manufacturer's
instructions to avoid exposure to fuel substances, or substances from incomplete
combustion, which can cause death or serious illness. The state of California
has determined that these substances may cause cancer, birth defects, or other
reproductive harm.
Installer Please Note: This equipment has been test fired and inspected. It has been
shipped free from defects from our factory. However, shipment and installation problems
such as loose wires, leaks, or loose fasteners may occur. It is the installer's responsibility to
inspect and correct any problem that may be found.
RECEIVING INSTRUCTIONS
Inspect shipment immediately when
received to determine if any damage
has occurred to the unit during
shipment. After the unit has been
uncrated, check for any visible
damage to the unit. If any damage is
found, the consignee should sign the
bill of lading indicating such damage
and immediately le claim for damage
with the transportation company.
IDENTIFICATION OF PARTS ................................38-39
Replacement Parts ................................................... 39
APPENDIX A – MODBUS REGISTERS ................40-41
UNIT NUMBER DESCRIPTION ................................. 42
START-UP AND INSPECTION SHEET ...................... 43
NOTICE: It is the equipment owner’s responsibility to provide any scaffolding or other apparatus required
to perform emergency service or annual/periodic maintenance to this equipment.
DESCRIPTION
The High Efciency Gas-Fired Unit Heaters are factory
assembled, power vented, low static pressure type
propeller fan unit heaters designed to be suspended within
the space to be heated. THESE HEATERS ARE NOT
TO BE CONNECTED TO DUCTWORK. The designs are
certied by ETL as providing a minimum of 96% thermal
efciency, and approved for use in California. Do not alter
these units in any way. If you have any questions after
reading this manual, contact the manufacturer.
The following terms are used throughout this manual,
in addition to the ETL requirements to bring attention
to the presence of potential hazards, or to important
information concerning the product:
Figure 1 - High Efciency Gas-Fired Propeller Unit Heater
situation which, if not avoided, may result in minor
injury or property damage.
NOTICE: Used to notify of special instructions on
installation, operation, or maintenance which are
important to equipment but not related to personal injury.
situation which, if not avoided, will result in death,
serious injury, or substantial property damage.
situation which, if not avoided, could result in death,
serious injury, or substantial property damage.
Indicates an imminently hazardous
Indicates an imminently hazard-ous
Indicates an imminently hazardous
See IDENTIFICATION OF PARTS, Figures 25 through 29
2
Page 3
GENERAL SAFETY INFORMATION
Failure to comply with the general
safety information may result in extensive
property damage, severe personal injury, or
death.
This product must be install be
a licensed plumber or gas tter when installed
within the Commonwealth of Massachusetts.
Installation must be made in accordance with local
codes, or in absence of local codes, with the latest
edition of the ANSI Standard Z223.1 (N.F.P.A. No. 54)
National Fuel Gas Code. All of the ANSI and NFPA
Standards referred to in these installation instructions are
those that were applicable at the time the design of this
appliance was certied. The ANSI Standards are available
from CSA Information Services, 1-800- 463-6727. The
NFPA Standards are available from the National Fire
Protection Association, Batterymarch Park, Quincy,
MA 02269. These unit heaters are designed for use in
airplane hangars when installed in accordance with ANSI/
NFPA No. 409, and in public garages when installed in
accordance with NFPA No. 88A and NFPA No.88B.
If installed in Canada, the installation must conform with
local building codes, or in the absence of local building
codes, with CSA-B149.1 “Installation Codes for Natural
Gas Burning Appliances and Equipment” or CSA-B149.2
“Installation Codes for Propane Gas Burning Appliances
and Equipment.” These unit heaters have been designed
and certied to comply with CSA 2.6. Also see sections
on installation in AIRCRAFT HANGARS and PUBLIC
GARAGES.
Do not alter the unit heater in
any way or damage to the unit and/or severe
personal injury or death may occur!
Disconnect all power and gas
supplies before installing or servicing the heater.
If the power disconnect is out of sight, lock
it in the open position and tag it to prevent
unexpected application of power. Failure to do
so could result in fatal electric shock, or severe
personal injury.
Ensure that all power sources conform
to the requirements of the unit heater, or damage to
the unit will result!
Follow installation instructions CAREFULLY to avoid
creating unsafe conditions. All wiring should be done
and checked by a qualified electrician, using copper
wire only. All gas connections should be made and leaktested by a suitably qualied individual, per instructions
in this manual. Also follow procedures listed on GAS
EQUIPMENT START-UP AND INSPECTION SHEET
located in this manual.
Use only the fuel for which the heater is designed (see
rating plate). Using LP gas in a heater that requires
natural gas, or vice versa, will create risk of gas leaks,
carbon monoxide poisoning, and explosion.
Do not attempt to convert the
heater for use with a fuel other than the one
intended unless using a factory provided
conversion kit. Such conversion is dangerous,
as it will create the risks previously listed.
Make certain that the power source conforms to the
electrical requirements of the heater.
Do not depend upon a thermostat
or other switch as sole means of disconnecting
power when installing or servicing heater.
Always disconnect power at main circuit breaker
as described above. Failure to do so could result
in fatal electric shock.
Special attention must be given to any grounding
information pertaining to this heater. To prevent the
risk of electrocution, the heater must be securely and
adequately grounded. This should be accomplished by
connecting a ground conductor between the service
panel and the heater. To ensure a proper ground,
the grounding means must be tested by a qualified
electrician.
Do not insert fingers or foreign objects into heater or
its air moving device. Do not block or tamper with the
heater in any manner while in operation, or just after it
has been turned off, as some parts may be hot enough
to cause injury.
This heater is intended for general heating applications
ONLY. It must NOT be used in potentially dangerous
locations such as ammable, explosive, chemical-laden,
or wet atmospheres.
Do not attach ductwork to this product or use it as a
makeup air heater. Such usage voids the warranty and
will create unsafe operation.
In cases in which property damage may result from
malfunction of the heater, a back-up system or
temperature sensitive alarm should be used.
The open end of gas piping systems
being purged shall not discharge into areas where
there are sources of ignition or into conned spaces
UNLESS precautions are taken as follows: (1) by
ventilation of the space, (2) control of the purging
rate, (3) elimination of all hazardous conditions. All
precautions must be taken to perform this operation
in a safe manner!
Unless otherwise specied, the following conversions
may be used for calculating SI unit measurements:
1 foot = 0.305 m
1 inch = 25.4 mm
1 gallon = 3.785 L
1 pound = 0.453 kg
1 psig = 6.894 kPa
1 cubic foot = 0.028m
1000 BTU/cu. ft. = 37.5 MJ/m
1000 BTU per hour = 0.293 kW
1 inch water column = 0.249 kPa
1 litre/second = CFM x 0.472
1 meter/second = FPM ÷ 196.8
3
3
3
Page 4
CONNECTION
SPECIFICATIONS
Figure 2 - Dimensional Drawing – High Efciency Unit Heater
"U"
"L"
"D"
"P"
FLUE
"E"
"G"
"J"
"W"
"N"
"K"
"A"
"C"
"B"
CONNECTION
"T"
"H"
CAT-10081B
4
Page 5
Table 1 - Performance and Dimensional Data - High Efciency Unit Heater
Unit Capacity (MBH)100200300400
PERFORMANCE DATA†
Input -BTU/Hr.100,000200,000300,000400,000
Output - BTU/Hr.96,000192,000285,000384,000
Thermal Efciency (%)96969596
Free Air Delivery - CFM1,6163,2324,8486,464
Air Temperature Rise - Deg. F55555555
Full Load Amps at 120V10.316.331.1831.18
Minimum Circuit Amps at 120V11.817.833.9333.93
Max. Overcurrent Protection at 120V17.823.844.9344.93
MOTOR DATA:
DIMENSIONAL DATA - inches (mm)
"A" Height to Top of Combustion Air Inlet18-3/418-3/427-1/834-7/8
"B" Jacket Width of Unit42-13/1654-13/1654-13/1654-13/16
"J" Side Panel to Centerline Combustion Air2-13/163-3/43-3/43-3/4
"K" Front Panel to Centerline Combustion Air4-1/25-5/165-5/165-5/16
"L" Overall Unit Depth38424242
"M" Side Depth27-7/1631-1/431-1/431-1/4
"N" Combustion Air Inlet Connection Dia.2344
"P" Flue Connection Diameter2244
"Q" Side Panel to Centerline Gas Connection2-5/82-5/82-5/82-5/8
"R" Bottom Panel to Centerline Gas Connection2-1/22-1/22-1/22-1/2
"S" Side Panel to Centerline Flue5-1/86-1/165-3/85-3/8
"T" Bottom Panel to Centerline Flue4-5/84-5/88-1/813-1/8
"U" Side to Centerline Condensate Drain Connection 8-1/29-1/29-1/29-1/2
"W" Rear to Centerline Condensate Drain Connection 9-9/1610-9/1610-1/810-1/8
Combustion Air Inlet Pipe Dia. - in.2344
* Flue Pipe Dia - in.2344
Gas inlet - in.1/21/23/43/4
Approximate Unit Weight - lb180260323385
Approximate Ship Weight -lb228305388460
† Ratings shown are for unit installations at elevations between 0 and 2,000 feet (0 to 610m). For unit installations in U.S.A. above 2,000 feet (610m), the unit
input must be eld derated 4% for each 1,000 feet (305m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the
National Fuel Gas Code, ANSI Standard Z223.1 (NFPA No. 54).
For installations in Canada, any reference to deration at altitudes in excess of 2,00 0 feet (610m) are to be ignored. At altitudes of 2,000 feet to 4,500 feet (610 to 1372m),
the unit must be eld derated and be so marked in accordance with the ETL certication. See HIGH ALTITUDE DERATION section and Table 10 for deration information.
* Field installed PVC ttings provided with unit sizes 200-400 as follows:
- Size 200 units come with a 2" to 3" PVC reducer
- Size 300 units come with a 2" to 4" PVC reducer
- Size 400 units come with a 2" to 4" PVC drain tee tting
Reducers/drain tee ttings are to be eld installed per Venting instructions.
Motor HP (Qty)1/21/2 (2)1 (2)1 (2)
Motor kW0.370.370.740.74
Motor Type, ODPPSCPSCPSCPSC
RPM1,5001,5001,6251,625
Amps @ 115V6.012.022.022.0
(476)(476)(689)(886)
(1087)(1392)(1392)(1392)
(438)(438)(653)(850)
(279)(279)(277)(292)
(710)(965)(1060)(1060)
(438)(540)(508)(508)
(438)(540)(660)(660)
(381)(660)(660)(660)
(403)(403)(619)(816)
(71)(95)(95)(95)
(114)(135)(134)(134)
(965)(1067)(1067)(1067)
(697)(794)(794)(794)
(51)(76)(102)(102)
(51)(51)(102)(102)
(67)(67)(67)(67)
(64)(64)(64)(64)
(130)(154)(137)(137)
(117)(117)(206)(334)
(216)(241)(241)(241)
(243)(268)(257)(257)
(mm)(51)(76)(102)(102)
(mm)(51)(76)(102)(102)
(kg)(81.6)(117.9)(146.5)(174.6)
(kg)(103.4)(138.3)(176.0)(208.6)
5
Page 6
INSTALLATION
Do not install unit heaters in
corrosive or ammable atmospheres! Premature
failure of, or severe damage to the unit will result!
Avoid locations where extreme
drafts can affect burner operation. Unit heaters
must not be installed in locations where air for
combustion would contain chlorinated, halogenated
or acidic vapors. If located in such an environment,
premature failure of the unit will occur!
Since the unit is equipped with an automatic gas ignition
system, the unit heater must be installed such that the
gas ignition control system is not directly exposed to
water spray, rain or dripping water.
NOTICE: Location of unit heaters is related directly
to the selection of sizes. Basic rules are as follows:
AIRCRAFT HANGARS: Unit Heaters must be installed
in aircraft hangars as follows: In aircraft hangars, unit
heaters must be at least 10 feet (3.0 m) above the upper
surface of wings or engine enclosures of the highest
aircraft to be stored in the hangar, and 8 feet (2.4 m)
above the oor in shops, ofces and other sections of
the hangar where aircraft are not stored or housed.
Refer to current ANSI/NFPA No. 409, Aircraft Hangars. In
Canada, installation is suitable in aircraft hangars when
acceptable to the enforcing authorities.
PUBLIC GARAGES: In repair garages, unit heaters
must be located at least 8 feet (2.4 m) above the oor.
Refer to the latest edition of NFPA 88B, Repair Garages.
PARKING STRUCTURES: In parking structures, unit heaters
must be installed so that the burner flames are located a
minimum of 18 inches (457 mm) above the oor or protected
by a partition not less than 18 inches (457 mm) high. Refer to
the latest edition of NFPA 88A, Parking structures.
In Canada, installation must be in accordance to the latest
edition of CSA B149 “Installation Codes for Gas Burning
Appliances and Equipment.”
AIR DISTRIBUTION: Direct air towards areas of maximum
heat loss. When multiple heaters are involved, circulation
of air around the perimeter is recommended where heated
air ows along exposed walls. Satisfactory results can also
be obtained where multiple heaters are located toward the
center of the area with heated air directed toward the outside
walls. Be careful to avoid all obstacles and obstructions
which could impede the warm air distribution patterns.
NOTICE: Unit heaters should not be installed to
maintain low temperatures and/or freeze protection
of buildings. A minimum of 45°F (7.2°C) thermostat
setting must be maintained. If the ambient
temperature drops to below freezing, it may result
in damage to heat exchanger and/or components.
AIR FOR COMBUSTION: The unit heater shall be
installed in a location in which the facilities for
ventilation permit satisfactory combustion of gas,
proper venting, and the maintenance of ambient air
at safe limits under normal conditions of use. The unit
heater shall be located in such a manner as not to interfere
with proper circulation of air within the confined space.
When buildings are so tight that normal inltration does not
meet air requirements, outside air shall be introduced per
Sections 1.3.4.2 and 1.3.4.3 of ANSI Z223.1 for combustion
requirements. A permanent opening or openings having a
total free area of not less than one square inch per 5,000
BTU/Hr. (1.5 kW) of total input rating of all appliances within
the space shall be provided.
NOTICE: Unit Heater sizing should be based on heat
loss calculations where the unit heater output equals
or exceeds heat loss.
NOTICE: Unit should be installed in an area where
the entering air does not exceed 104°F. Temperatures
above 104°F will cause the propeller motor to trip
on its thermal overload protection, requiring a cool
down period before the motor can reset.
CLEARANCES: Each Gas Unit Heater shall be
located with respect to building construction and other
equipment so as to permit access to the Unit Heater.
Clearance between vertical walls and the vertical sides
of the Unit Heater shall be no less than 6 inches (152
mm). However, to ensure access to the burner and
power venter compartments, a minimum of 18 inches
(457 mm) is required for the access panel side. A
minimum clearance of 6 inches (152 mm) must be
maintained between the top of the Unit Heater and
the ceiling. The bottom of the Unit Heater must be no
less than 6 inches (152 mm) from any combustible.
The distance between rear of unit and vertical wall
should be no less than 18 inches (457 mm) for the size
100/200 and 36 inches (914mm) for the size 300/400
to maintain inlet air ow. The distance between the ue
collector and any combustible must be no less than 6
inches (152 mm). Also see AIR FOR COMBUSTION
and VENTING sections.
NOTICE: Increasing the clearance distances may
be necessary if there is a possibility of distortion or
discoloration of adjacent materials.
Make certain that the lifting
methods used to lift the heater and the methods
of suspension used in the eld installation of the
heater are capable of uniformly supporting the
weight of the heater at all times. Failure to heed
this warning may result in property damage or
personal injury!
6
Page 7
INSTALLATION (continued)
Make sure that the structure
to which the unit heater is to be mounted is
capable of safely supporting its weight. Under
no circumstances must the gas lines, the venting
system or the electrical conduit be used to support
the heater; or should any other objects (i.e. ladder,
person) lean against the heater gas lines, venting
the suspension of each unit heater is more than
adequate for the job. Failure to do so may result in
extensive property damage, severe personal injury,
or death! Washers should not be used between the
unit nutsert and jam nut. Use of a washer may cause
the nutsert to become dislodged from the unit.
system or the electrical conduit for support. Failure
to heed these warnings may result in property
Refer to Figures 3A through 3E for suspension of units.
damage, personal injury, or death.
For unit sizes 300/400, pay special attention to the
Unit Heaters must be hung level from
side to side and from front to back. Failure to do so
orientation of the angle mounting brackets per Figures 3B
and 3E to ensure brackets sit ush on the bottom of the unit.
will result in poor performance and/or premature
failure of the unit.
Figure 3A - High Efciency Unit Heater Suspension (for sizes 100/200)
3/8" THREADED SUSPENSION
ROD & JAM NUT BY INSTALLER
OUTSIDE JACKET
A
PANEL (UNIT)
Ensure that all hardware used in
A
Figure 3B - High Efciency Unit Heater Suspension (for sizes 300/400)
SECTION A-A
SCALE 1:1
CAT-10084A
CAT-10166A
7
Page 8
Figure 3C - Heater Mounting: Steel Construction (for all sizes)
Figure 3D - Heater Mounting: Wood Construction Joists (for sizes 100/200)
:22'&216758&7,21-2,676
JOIST
WASHER
& NUT
2" X 6" LAG
BOLTED
ACROSS JOISTS
3/8'' THREADED
ROD
UNIT HEATER
100/200 SIZES
Figure 3E - Heater Mounting: Wood Construction Joists (for sizes 300/400)
:22'&216758&7,21-2,676
NUT &
WASHER
NUT (2)
& WASHER
2" X 6" LAG
BOLTED
ACROSS JOISTS
JOIST
1/2'' THREADED
ROD
THREADED
INSERT
CAT-10065A
LAG BOLT
& WASHER
LAG BOLT
& WASHER
*Note: Angle mounting brackets are provided by the manufacturer for unit sizes 300/400. All other hanging hardware
and wood is not included with the unit and should be eld supplied.
FRONT OF
UNIT HEATER
300/400 SIZES
NUT (2)
& WASHER
8
CAT-10165A
Page 9
INSTALLATION – GAS PIPING
To avoid damage or possible
personal injury, do not connect gas piping to
this unit until a supply line pressure/leak test
has been completed. Connecting the unit before
completing the pressure/leak test may damage
the unit gas valve and result in a re hazard.
Do not rely on a shut-off valve to
isolate the unit while conducting gas pressure/
leak tests. These valves may not be completely
shut off, exposing the gas valve to excessive
pressure and damage.
PIPE SIZING
To provide adequate gas pressure to the gas unit heater,
size the gas piping as follows:
1. Find the cu. feet/hr. by using the following formula:
Cu. ft./hr. =
Input BTU/Hr.
1000
2. Refer to Table 2. Match “Length of Pipe in Feet” with
appropriate “Gas Input - Cu. Feet/Hr.” gure. This
gure can then be matched to the pipe size at the
top of the column.
200,000 BTU/Hr 1,000 BTU/cu. ft.
= 200 Cu. ft./hr.
Using Table 2, a 1 inch pipe is needed.
NOTE: See GENERAL SAFETY INFORMATION
section for English/Metric unit conversion factors.
NOTICE: If more than one unit heater is to be served
by the same piping arrangement, the total cu. ft./hr.
input and length of pipe must be considered.
NOTICE: If the gas unit heater is to be red with LP
gas, consult your local LP gas dealer for pipe size
information.
NOTICE: HEATER INSTALLATION FOR USE WITH
PROPANE (BOTTLED) GAS MUST BE MADE BY
A QUALIFIED L.P. GAS DEALER OR INSTALLER.
HE/SHE WILL INSURE THAT PROPER JOINT
COMPOUNDS ARE USED FOR MAKING PIPE
CONNECTIONS; THAT AIR IS PURGED FROM
LINES; THAT A THOROUGH TEST IS MADE FOR
LEAKS BEFORE OPERATING THE HEATER; AND
THAT IT IS PROPERLY CONNECTED TO THE
PROPANE GAS SUPPLY SYSTEM.
Example:
It is determined that a 67 ft. (20.4m) run of gas
pipe is required to connect a 200 MBTU gas unit heater
to a 1,000 BTU/cu ft. (0.29kW) natural gas supply.
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters per Hour) for Gas Pressures of 0.5 psig (3.5 kPa) or Less,
and a Pressure Drop of 0.5 Inch Water Column (124.4 Pa)
(Based on a 0.60 Specic Gravity Gas)
Nominal
1. Determine the required Cu. Ft./Hr. by dividing the input by 1000. For SI/Metric measurements: Convert BTU/Hr. to kilowatts. Multiply the units
inputs (kW) by 0.0965 to determine Cu. Meters./Hr. 2. FOR NATURAL GAS: Select pipe size directly from the table. 3. FOR PROPANE GAS:
Multiply the Cu. Ft./Hr. value by 0.633; then, use the table. 4. Refer to the metric conversion factors listed in the General Safety section for SI
Unit measurement conversions.
Before any connection is made to the existing line
supplying other gas appliances, contact the local gas
company to make sure that the existing line is of adequate
size to handle the combined load.
Table 2 - Gas Pipe Size
9
Page 10
INSTALLATION – GAS PIPING (continued)
PIPE INSTALLATION
1. Install the gas piping in accordance with applicable
local codes.
2. A eld provided lock-up type high pressure regulator
must be used to limit the supply pressure to a
maximum of 14 inches W.C. (3.5 kPa). All piping
should be sized in accordance with the latest edition
of ANSI Standard Z223.1 (NFPA 54), National Fuel
Gas Code; in Canada, according to CSA B149. See
Table 2 for correct gas piping size. If gas pressure is
excessive, install a pressure regulating valve in the
line upstream from the main shutoff valve.
NOTICE: For proper operation, unit requires a
minimum supply gas pressure of 5 inches W.C. (1.2
kPa) for natural gas or 8 inches W.C. (2.0 kPa) for
propane (LP) gas.
3. Adequately support the piping to prevent strain on
the gas manifold and controls. Supports should be
spaced in accordance with the latest edition of ANSI
Standard Z223.1 (NFPA 54), National Fuel Gas Code;
in Canada, according to CSA B149.
4. To prevent the mixing of moisture with gas, run the
take-off piping from the top, or side, of the main.
5. Gas valve has adjustment ports to adjust ow rate.
See START-UP section.
6. Provide a drip leg in the gas piping near the gas unit
heater. A ground joint union and a manual gas shutoff
valve should be installed ahead of the unit heater
controls to permit servicing. The manual shutoff valve
must be located external to the jacket (See Figure 4).
7. Make certain that all connections have been
adequately doped and tightened.
Do not over tighten the inlet gas
piping into the valve. This may cause stresses that
will crack the valve!
NOTICE: Use pipe joint sealant resistant to the action of
liqueed petroleum gases regardless of gas conducted.
Check all pipe joints for leakage
using a soap solution or other approved method.
Never use an open flame or severe personal
injury or death may occur!
Figure 4 - Pipe Installation, Standard Controls
Never use an open ame to detect
gas leaks. Explosive conditions may exist which
may result in personal injury or death!
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during any
pressure testing of that system in excess of 1/2 psig (3.5 kPa).
The appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5 kPa).
INSTALLATION – CONDENSATE PIPING
1. Screw 3/4" adaptor into condensate connection
located in the bottom of the unit.
2. Prime and cement together components as shown
in Figure 5.
Do not install condensate trap
horizontally. Failure to install the condensate
trap vertically may result in ue gas entering the
condensate piping.
3. A field-provided 3/4" PVC nipple must be primed and
cemented between the 3/4" adapter and 3/4" coupler.
The nipple length must long enough that the total distance
between the bottom of unit and clear ultra trap is equal to
or greater than the minimum distance shown in Table 3.
Table 3 - Minimum Condensate Trap Distance
Size 100Size 200-400
“X” - Minimum Condensate Trap Distance2.5"4.5"
Optional condensate pump and neutralizer should be piped
per their separate corresponding installation manuals.
Figure 5 - Condensate Piping
;
SIZE
100200
2.5"4.5""X"
CAT-10080A
10
CONDENSATE
CONNECTION
3/4" ADAPTOR
FIELD PROVIDED
3/4" PVC NIPPLE
3/4" COUPLER
CLEAR ULTRA TRAP
FIELD PROVIDED 3/4" PVC
PIPE TO DRAIN
Page 11
ELECTRICAL CONNECTIONS
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
disconnect power before
servicing can cause severe
personal injury or death.
Standard units are shipped for use on 115 volt, 60 hertz,
single phase electric power. The motor name-plate and
electrical rating of the transformer should be checked
before energizing the unit heater electrical system. All
external wiring must conform to the latest edition of
ANSI/NFPA No. 70, United States National Electrical
Code, and applicable local codes; in Canada, to the
Canadian Electrical Code, Part 1, CSA Standard C22.1.
1. Cold Areas - Outside walls or areas where drafts
may affect the operation of the control.
2. Hot Areas - Areas where the sun's rays, radiation,
or warm air currents may affect the operation of the
control.
3. Dead Areas - Areas where the air cannot circulate
freely, such as behind doors or in corners.
Figure 6A - Low-voltage Thermostat Wiring,
Single Stage
LOW-VOLTAGE
SINGLE STAGE
THERMOSTAT
G
R
W
R
W1
W2
C
Field installed step-down
transformers provided for units with non-standard
supply voltage options 2-7 (any voltage other than
115/1/60) cannot be mounted on the unit due to
the weight of the transformer. The step-down
transformer should be mounted elsewhere and
wired to the unit accordingly. Failure to do so
could result in fatal electric shock or severe
personal injury.
Do not use any tools (i.e. screwdriver,
pliers, etc.) across terminals to check for power. Use
a voltmeter.
It is recommended that the electrical power supply to
each unit heater be provided by a separate, fused, and
permanently live electrical circuit. A disconnect switch
of suitable electrical rating should be located as close
to the gas valve and controls as possible. Each unit
heater must be electrically grounded in accordance with
the latest edition of the United States National Electrical
Code, ANSI/NFPA No. 70, or CSA Standard C22.1.
THERMOSTAT WIRING AND LOCATION:
NOTICE:The thermostat must be mounted on a
vertical, vibration-free surface, free from air currents,
and in accordance with the furnished instructions.
Mount the thermostat approximately 5 feet (1.5 m) above
the oor, in an area where it will be exposed to a free
circulation of average temperature air. Always refer to
the thermostat instructions, as well as our unit wiring
diagram, and wire accordingly. Avoid mounting the
thermostat in the following locations:
CAT-10066A
Figure 6B – Low-voltage Thermostat Wiring,
Two Stage
W1
R
G
R
W2
W1
W2
C
CAT-10122A
NOTICE: From a cold start, the start-up fan delay
should not exceed 30 seconds from after flame
sensing.
IMPORTANT: For all wiring connections, refer to the
wiring diagram shipped with your unit (either afxed
inside the control box access panel or enclosed in
the installation instructions envelope). Should any
original wire supplied with the heater have to be
replaced, it must be replaced with wiring material
having a temperature rating of at least 105°C.
Should any high limit wires have to be replaced,
they must be replaced with wiring material having a
temperature rating of 200°C minimum.
11
Page 12
ELECTRICAL CONNECTIONS (continued)
Figure 7A – Unit Wiring Diagram, High Efciency Unit Heater Size 100, Equipped with Natural or Propane
(LP) Gas, Modulating with Outside Air Reset (Master)
12
Page 13
ELECTRICAL CONNECTIONS (continued)
Figure 7B – Unit Wiring Diagram, High Efciency Unit Heater Size 200, Equipped with Natural or Propane
(LP) Gas, Modulating with Outside Air Reset (Master)
13
Page 14
ELECTRICAL CONNECTIONS (continued)
Figure 7C – Unit Wiring Diagram, High Efciency Unit Heater Size 300/400, Equipped with Natural or Propane
(LP) Gas, Modulating with Outside Air Reset (Master)
14
Page 15
VENTING – GENERAL GUIDELINES
ANSI now organizes vented
appliances into four categories.
Venting Categories
Non-
Condensing Condensing
Negative
Vent I II
Pressure
Positive
Vent III IV
Pressure
Category I
Includes non-condensing appliances
with negative vent pressure, like the
traditional atmospheric unit heater.
Category II
Groups condensing appliances
with negative vent pressure.
Category III
Appliances are non-condensing and
operate with a positive vent pressure.
Category IV
Covers condensing appliances with
positive vent pressure.
NOTICE: Category I, II and III do
not apply to equipment specified
within this manual. These unit
heaters are Category IV appliances.
All unit heaters must be vented! All Venting installations shall be in accordance with the latest edition of Part 7, Venting
of Equipment of the National Fuel Gas Code, ANSI Z223.1 (NFPA 54), or applicable provisions of local building codes.
The following instructions apply to Canadian installations in addition to installation and operating instructions:
1. Installation must conform with local building codes, or in the absence of local codes, with current CSA B149.1,
Installation Codes for Natural Gas Burning Appliances and Equipment, or CSA B149.2, Installation Codes for
Propane Gas Burning Appliances and Equipment.
2. Any reference to U.S. standards or codes in these instructions are to be ignored, and the applicable Canadian
standards or codes applied.
CARBON MONOXIDE! Your venting
system must not be blocked by any snow, snow
drifts, or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! Failure to heed these warnings could result
in Carbon Monoxide Poisoning (symptoms include
grogginess, lethargy, inappropriate tiredness, or
u-like symptoms).
FLUE PIPE REDUCER
Size 200 units ship with a field installed 2" to 3" PVC
reducer and size 300 units ship with a field installed
2" to 4" PVC reducer. The reducer must be installed
in a horizontal section of the flue pipe system within
12 inches (305 mm) of the unit. All vent pipe joints and
seams must be sealed to prevent leakage. All joints
must be cleaned prior to assembly. Joints should then be
primed in accordance with ASTM F 656. After priming,
Each unit must have an individual vent pipe and vent
joints should be cemented per ASTM D 2564.
terminal! Each unit MUST NOT be connected to other
vent systems or to a chimney.
Size 400 units ship with a field installed 2" to 4" PVC
drain tee fitting. The drain tee must be installed in a
Do not damper or add heat recovery devices to the ue piping.
Failure to open such a damper prior to operating gas unit will
result in the spillage of ue gas into the occupied space.
horizontal section of the flue pipe system within 12
inches (305 mm) of the unit with the drain pointing
downward. The condensate tubing will ship connected
to the flue collector coiled inside the power venter
NOTICE: The high efficiency unit heater is likely
to produce a vapor plume due to condensation.
Surfaces near the vent termination will likely become
coated with condensation.
compartment. The tubing should be uncoiled and
connected to the bottom of the condensate drain tee. All
vent pipe joints and seams must be sealed to prevent
leakage. All joints must be cleaned prior to assembly.
Joints should then be primed in accordance with ASTM F
Condensing flue gases can freeze
on exterior building surfaces which may cause
656. After priming, joints should be cemented per ASTM
D 2564.
discoloration and degradation of the surfaces.
Table 4
Structure/Object
Door, window, or gravity vent inlet;
combustion air inlet for other appliances
Forced air inlet within 10 ft.
Adjoining Building or parapet10 ft.10 ft. (3.04m)
Adjacent public walkways
Electric, gas meters & regulators4 ft. horizontal
Above grade level*1 ft.1 ft. (0.3m)
*Minimum above maximum snow depth, or per local code, whichever is greater.
9 in. for 10,000 to 50,000 BTU/Hr input; 12 in. for input
exceeding 50,000 BTU/Hr.
3 ft. above6 ft. (1.8m)
7 ft. above
grade
Vent Systems Termination Clearance Requirements
Minimum Clearance for Termination Locations
USACANADA
9 in. (230mm) for 10,000 to 50,000 BTU/Hr input; 12 in.
(305mm) for input exceeding 50,000 BTU/Hr.
7 ft. (2.1m) above grade
3 ft. (0.9m) horizontally from meter/regulator assembly. 6 ft.
(1.8m), any direction, from a gas service regulator vent outlet
15
Page 16
STANDARD COMBUSTION – HORIZONTALLY VENTED UNIT HEATERS
(CATEGORY IV)
This appliance uses a positive
pressure venting system. All joints must be
sealed completely to prevent leakage of flue
products into occupied spaces. Failure to do this
may result in severe personal injury, death or
major property damage.
1. Horizontal venting arrangements are designed to be
used with schedule 40 vent pipe. All heaters should
be vented with UL 1738 listed vent pipe. For
installations in Canada, use corrosion resistant and
gas-tight, listed vent pipe conforming with local
building codes, or in the absence of local building
codes, with the current CSA-B149.1, Installation
Codes for natural Gas Burning Appliances and
Equipment or CSA-B149.2, Installation Codes for
Propane Gas Burning Appliances and Equipment.
Approved vent pipe includes but is not limited to:
ULC-S636 PVC or CPVC Vent pipe. Vent pipe must
be rated for up to 140°F (60°C) operating temperature.
Type B vent should not be used.
Do not use Type B (double wall)
vent internally within the building on high
efciency unit heaters! This can result in death,
serious injury or substantial property damage.
5. The vent system must be installed to prevent
collection of condensate. Pitch horizontal pipes
downward 1/4 inch per foot (21 mm/m) toward the
unit for condensate drainage.
6. Horizontal portions of the venting systems shall be
supported at maximum intervals of 4 feet (1.2 m) to
prevent sagging (in Canada, support at 3 feet (1 m)
maximum intervals).
7. Seal all vent pipe joints and seams to prevent
leakage. All joints must be cleaned prior to assembly.
Joints should then be primed in accordance with
ASTM F 656. After priming, joints should be
cemented per ASTM D 2564.
8. Insulate single wall vent pipe exposed to cold air or
running through unheated areas.
9. Each unit must have an individual vent pipe and
vent terminal! Each unit MUST NOT be connected
to other vent systems or to a chimney.
Figure 8 – Horizontal Venting, Standard Combustion
Use of cellular core pipe for any
exhaust vent component is prohibited. Use of
cellular core pipe may result in severe personal
injury, death, or major property damage.
NOTICE: Installations in Canada require compliance
with ULC-S636 Standard for Type BH Gas Venting
Systems.
2. The vent pipe diameter MUST be as specied (see
Table 1). All unit sizes are factory equipped with
the required ue size collar; attach in place (if not
already factory-mounted to outlet).
3. The vent pipe equivalent length must not exceed 50
feet (15.2 m). Equivalent length is total length of straight
sections PLUS 5 feet (1.5 m) for each 90 degree elbow
and 2.5 feet (0.76 m) for each 45 degree elbow.
4. The vent terminal must be at least 12 inches (305
mm) from the exterior of the wall that it passes
through to prevent degradation of the building
material by flue gases. Through the wall vent for
these appliances shall NOT terminate over public
walkways, or over an area where the condensate
or vapor could create a nuisance or hazard or
could be detrimental to the operation of regulators,
relief valves, or other equipment. See Table 4 for
termination clearance requirements.
PITCH PIPE DOWN TOWARDS
UNIT 1/4" PER FT. (21 mm/m) OF
RUN TO ALLOW FOR
CONDENSATE DRAINAGE
ELBOW OR TEE
EXHAUST
CAT-10067A
NOTICE: Increasing the vent termination clearance
distances may be necessary if there is a possibility
of distortion or discoloration of adjacent materials.
16
Page 17
STANDARD COMBUSTION – VERTICALLY VENTED UNIT HEATERS
(CATEGORY IV)
This appliance uses a positive
pressure venting system. All joints must be
sealed completely to prevent leakage of flue
products into occupied spaces. Failure to do this
may result in severe personal injury, death or
major property damage.
1. Vertical venting arrangements are designed to be
used with schedule 40 vent pipe. All heaters should
be vented with UL 1738 listed vent pipe. For
installations in Canada, use corrosion resistant and
gas-tight, listed vent pipe conforming with local
building codes, or in the absence of local building
codes, with the current CSA-B149.1, Installation
Codes for natural Gas Burning Appliances and
Equipment or CSA-B149.2, Installation Codes for
Propane Gas Burning Appliances and Equipment.
Approved vent pipe includes but is not limited to:
ULC-S636 PVC or CPVC Vent pipe. Vent pipe must
be rated for up to 140°F (60°C) operating temperature.
Type B vent should not be used.
Do not use Type B (double wall)
vent internally within the building on high
efciency unit heaters! This can result in death,
serious injury or substantial property damage.
4. Vent system terminations for these appliances shall
NOT terminate in an area where the condensate
or vapor could create a nuisance or hazard or
could be detrimental to the operation of regulators,
relief valves, or other equipment. See Table 4 for
termination clearance requirements.
5. The vent pipe equivalent length must not exceed
50 feet (15.2 m). Equivalent length is total length
of straight sections PLUS 5 feet (1.5 m) for each
90 degree elbow and 2.5 feet (0.76 m) for each 45
degree elbow.
6. Seal all vent pipe joints and seams to prevent
leakage. All joints must be cleaned prior to assembly.
Joints should then be primed in accordance with
ASTM F 656. After priming, joints should be
cemented per ASTM D 2564. The vent system must
be installed to prevent collection of condensate.
Pitch horizontal pipes downward 1/4 inch per foot
(21 mm/m) toward the unit for condensate drainage.
7. Horizontal portions of the venting systems shall be
supported at maximum intervals of 4 feet (1.2 m) to
prevent sagging (in Canada, support at 3 feet (1 m)
maximum intervals).
Use of cellular core pipe for any
exhaust vent component is prohibited. Use of
cellular core pipe may result in severe personal
injury, death, or major property damage.
NOTICE: Installations in Canada require compliance
with ULC-S636 Standard for Type BH Gas Venting
Systems
2. The vent pipe diameter MUST be as specied (see
Table 1). All unit sizes are factory equipped with
the required ue size collar; attach in place (if not
already factory-mounted to outlet).
3. The top of the vent pipe should extend at least 2 feet
(0.61 m) above the highest point on the roof within
10 feet (3.05 m) of the termination. Consideration
should be made for anticipated snow depth.
8. Insulate single wall vent pipe exposed to cold air or
running through unheated areas.
9. Each unit must have an individual vent pipe and
termination. Each unit MUST NOT be connected to
other vent systems or to a chimney.
Figure 9 – Vertical Venting, Standard Combustion
ROOF
FLASHING
CAT-10068A
FLUE PIPE
17
Page 18
SEPARATED COMBUSTION – TWO PIPE VENTING
NOTE: For non-concentric venting (two wall or two roof penetrations, one for combustion air and a second for ue
pipe), follow the instructions below. For concentric venting (single wall or roof penetration), follow the concentric
venting instructions in SEPARATED COMBUSTION – CONCENTRIC VENTING Section.
AIR INLET COLLAR
When unit is to be used in a separated vent system,
the inlet collar located on the top panel of the unit will
be connected to the combustion air intake pipe. This
connection is made by using the appropriate size rubber
coupling (eld provided) for each size unit. The coupling
is installed so that air inlet pipe can be detached from the
unit for serviceability purposes.
COMBUSTION AIR VENTING AND PIPING
CARBON MONOXIDE!
Your venting system must not be blocked by
any snow, snow drifts, or any foreign matter.
Inspect your venting system to ensure adequate
ventilation exists at all times! Failure to heed
these warnings could result in Carbon Monoxide
Poisoning (symptoms include grogginess,
lethargy, inappropriate tiredness, or flu-like
symptoms).
1. The combustion air system installation must be in
accordance with the current edition of the National
Fuel Gas Code-NFPA 54 or ANSI Z223.1 National
Fuel Gas Code. In Canada, installation must be in
accordance with CSA-B149.1 “Installation Code for
Natural Gas Burning Appliances and Equipment” and
CSA-B149.2 “Installation Code for Propane Burning
Appliances and Equipment.”
2. Each unit heater MUST have its own combustion
air system. It MUST NOT be connected to other air
intake systems.
3. Use UL 1738 listed schedule 40 vent pipe for the
vent system. For installations in Canada, use ULS636 listed vent pipe conforming with local building
codes, or in the absence of local building codes,
with current CSA-B149.1 “Installation Codes for
Natural Gas Burning Appliances and Equipment” or
CSA-B149.2, “Installation Codes for Propane Gas
Burning Appliances and Equipment.”
Do not use Type B (double
wall) vent internally within the building on high
efciency unit heaters! This can result in death,
serious injury or substantial property damage.
Use of cellular core pipe for any
exhaust vent component is prohibited. Use of
cellular core pipe may result in severe personal
injury, death, or major property damage.
NOTICE: Installations in Canada require compliance
with ULC-S636 Standard for Type BH Gas Venting
Systems.
4. Long runs of single wall combustion air piping
passing through an unheated space may require
insulating if condensation becomes noticeable.
5. The combustion air inlet system must be installed
to prevent collection of condensate. Pitch horizontal
pipes downward 1/4 inch per foot (21 mm/m) toward
the inlet cap to facilitate drainage.
6. The equivalent length of the combustion air system
must not be less than 5 feet (1.5 m) and must not
exceed 50 feet (15.2 m). Equivalent length equals
the total length of straight pipe plus 5 feet (1.5 m) for
each 90 degree elbow and 2.5 feet (0.76 m) for each
45 degree elbow.
NOTICE: For optimum performance keep the
combustion air system as straight as possible.
7. Seal all vent pipe joints and seams to prevent
leakage. All joints must be cleaned prior to assembly.
Joints should then be primed in accordance with
ASTM F 656. After priming, joints should be
cemented per ASTM D 2564.
8. For horizontal combustion air systems longer than
5 feet (1.5 m), the system must be supported
from overhead building structures at 4 foot (1.2 m)
intervals in the U.S. and at 3 foot (0.91 m) intervals
in Canada.
EXHAUST VENTING
For ue pipe installation, follow the steps in the STANDARD
COMBUSTION VENTING sections.
NOTICE: Every Separated Combustion unit to be installed MUST use the factory-available Concentric Vent
Kit. If you do not have this kit, contact the manufacturer ASAP to obtain one prior to installation.
AIR INLET COLLAR
When the unit is to be used in a separated vent system,
the inlet collar located on the top panel of the unit will
be connected to the combustion air intake pipe. This
connection is made by using a eld-provided rubber
coupling in the appropriate size for each unit capacity. The
coupling is installed so that air inlet pipe can de detached
from the unit for serviceability purposes.
GENERAL
Concentric venting allows both the intake for combustion air
and the exhaust vent to pass through a single standard roof
or sidewall opening. This is an alternative to the standard
two pipe intake/vent shown in the separated combustion
venting instructions. Follow these instructions as well as the
separated combustion venting instruction for installation of the
intake/vent pipe(s) and all unit heater installation procedures.
IMPORTANT:Concentric venting reduces the
allowable intake/vent piping length by 5 feet (1.5 m)
from that listed in the venting instructions.
Do not operate the unit until the
installation and assembly of the Concentric Vent
Kit and all piping are completed. Failure to follow
this warning could result in re, personal injury
or death.
The Concentric Vent Kit contains the following parts:
(1) Combustion Air Inlet Cap
(1) Air Inlet Pipe
(1) Flue Pipe
(1) Intake/Vent Concentric “Y”
Figure 13 – Concentric Vent Kit Assembly
In Canada, construct all combustion air and vent pipes
for this unit of CSA or ULC certied Schedule 40 PVC,
PVC-DWV, or ABS-DWV pipe and pipe cement.
1. Shipping dimension. This may be eld modied by cutting or extending
both the intake and exhaust pipes. 12 inches (305 mm) is the minimum
allowable length and 60 inches (1.5 m) is the maximum allowable length
for this dimension. Only SDR-26 PVC (ASTM D2241) may be used for
extending pipes. Do not extend pipes with Schedule 40 PVC or couplings.
2. This dimension will change if the intake/vent pipes are lengthened
or shortened.
Intake/Vent
Nom. Pipe Size
1002"34-3/4"3-1/2"19-1/2"
2003"39-1/8"4-1/2"24"
Overall
Assembled
Length
1
Intake Pipe
Outside
Diameter
Air Inlet Pipe
Length
2
NOTICE: Some local code inspectors are not familiar
with concentric vents. Be sure to check local code
requirements and acceptability prior to installation.
HORIZONTAL SIDEWALL MOUNTING
NOTE: Refer to the following items before horizontal
installation:
• Check INSTALLATION section of this manual for
allowable clearances and locations.
• Refer to Figures 16 and 17 when venting multiple units
using concentric venting.
• Avoid locations with high winds.
• Avoid locations where Concentric Vent Kit is likely to
be damaged.
• Avoid locations where vapors are objectionable, or
may damage the structure, plants or air conditioning
condensing unit.
ASSEMBLED TERMINAL
AIR INLET PIPE
FITTING
FLUE PIPE
Pipe and ttings are required to complete installation
(user supplied). The combustion air and vent pipe ttings
must conform to ANSI and ASTM standards D1785, F891,
D2665, D2241, D2661, or F628. Pipe cement and primer
must conform to ASTM standards D2564 or D2235.
COMBUSTION
AIR INLET CAP
CAT-10069A
1. Determine correct concentric vent kit size for the unit
capacity selected.
2. Determine the best location for the concentric vent;
refer to Figures 15, 16 and 17. Also refer to Table 4
for vent termination clearance requirements.
3. When installing multiple units with concentric venting,
refer to the following guidelines:
a. Do not install multiple concentric vent terminations
directly above one another unless separated by
a minimum of 3 feet (0.91 m); see Figure 16.
b. Install multiple concentric vent terminations so
the horizontal distance between the ends of each
air intake is 4 inches (102 mm) or less or greater
than 24 inches (610 mm); see Figure 17. This will
prevent a recirculation of ue gas.
4. Cut a hole for Concentric Vent kit.
a. Cut a 4 inch (102 mm) diameter hole for size 100
unit, 2 inch (51 mm) concentric vent kit.
b. Cut a 5 inch (127 mm) diameter hole for size 200
unit, 3 inch (76 mm) concentric vent kit.
c. Cut a 6 inch (152 mm) diameter hole for size
300/400 unit, 4 inch (102 mm) concentric vent
kit.
5. Partially assemble Concentric Vent kit. Follow venting
instructions for cleaning and cementing.
a. Cement “Y” tting to larger diameter air inlet pipe
(Figure 13).
b. Cement combustion air inlet cap to smaller
diameter ue pipe (Figure 13).
6. Install “Y” tting and pipe assembly through hole.
7. Install combustion air inlet cap and large diameter
pipe assembly. Cement and fully insert small diameter
pipe in “Y” concentric tting.
8. Secure to structure using metal strapping or equivalent
support material (eld supplied); refer to Figure 14.
9. Cement combustion air and vent pipes to concentric
vent kit. Refer to Figure 14 for proper pipe attachment.
Figure 15 - Horizontal Sidewall Concentric Venting,
Single Termination
ROOF OVERHANG
36" MINIMUM
(915 mm)
CAT-10072A
(25 mm)
COMBUSTION
AIR
MAINTAIN 12" (305 mm) CLEARANCE
ABOVE HIGHEST ANTICIPATED
SNOW LINE OR GRADE
NOTE: Keep assembly free of insulation during installation.
NOTE: Maintain clearance dimensions as shown in
Figures 15, 16 and 17. Also refer to Table 4 for vent
termination clearance requirements.
NOTE: If assembly is too short, the two pipes supplied
in the kit may be replaced by using same diameter,
eld supplied SDR-26 PVC (ASTM D2241) pipe. Do not
extend pipes with Schedule 40 PVC or couplings. The
additional wall thickness will restrict combustion air
and may cause operational problems. Do not extend
air inlet pipe more than 60 inches (1.5 m); see Figure 14.
Do not use field supplied couplings
to extend pipes; ue gas may leak from the venting
system resulting in unsafe conditions.
If the venting system is not
installed according to these guidelines, ue gas
may recirculate, possibly causing the intake pipe
to freeze shut during cold weather operation.
VERTICAL ROOF MOUNTING
NOTE: Roof mounting is recommended as it allows less
intake air contaminants and reduces ground-level exhaust.
1. Determine correct concentric vent kit size for the unit
capacity selected.
2. Determine the best location for the concentric vent.
3. Cut a hole for Concentric Vent Kit.
a. Cut a 4 inch (102 mm) diameter hole for size 100
unit, 2 inch (51 mm) concentric vent kit.
b. Cut a 5 inch (127 mm) diameter hole for size 200
unit, 3 inch (76 mm) concentric vent kit.
c. Cut a 6 inch (152 mm) diameter hole for size 300/400
unit, 4 inch (102 mm) concentric vent kit.
4. Partially assemble Concentric Vent kit. Follow venting
instructions for cleaning and cementing.
a. Cement “Y” tting to larger diameter air inlet pipe
(Figure 13).
b. Cement combustion air inlet cap to smaller
diameter pipe (Figure 13).
5. Install “Y” tting and pipe assembly through hole and
roof boot/ashing (eld supplied).
6. Secure to roof using metal strapping or equivalent
support material (eld supplied); refer to Figure 18.
7. Install combustion air inlet cap and small diameter
pipe assembly into roof. Cement and fully insert small
diameter pipe in “Y” concentric tting.
NOTE: Keep assembly free of insulation during
installation.
NOTE: Install multiple concentric vent terminations
so the horizontal distance between the ends of each
air intake is 4 inches (102 mm) or less or greater than
24 inches (610 mm); see Figure 17. This will prevent
a recirculation of ue gas.
NOTE: Termination height must be above roof surface or anticipated snow level (minimum 12 inches
(305 mm) in U.S. or minimum 18 inches (458 mm) in
Canada) as shown in Figures 18 and 19.
NOTE: If assembly is too short, the 2 pipes supplied
in the kit may be replaced by using same diameter,
eld supplied SDR-26 PVC (ASTM D2241) pipe. Do not
extend pipes with Schedule 40 PVC or couplings. The
additional wall thickness will restrict combustion air
and may cause operational problems. Do not extend air
inlet pipe more than 60 inches (1.5 m); see Figure 14.
8. Cement combustion air and vent pipes to concentric
vent kit. Refer to Figure 14 for proper pipe attachment.
9. Check installation by allowing unit to run through one cycle.
Do not use field supplied couplings
to extend pipes; ue gas may leak from the venting
system resulting in unsafe conditions.
22
Page 23
GAS CONVERSION
This conversion kit shall be installed
by a qualied service agency in accordance with
the manufacturer's instructions and all applicable
codes and requirements of the authority having
jurisdiction. If the information in these instructions is
not followed exactly, a re, explosion or production
of carbon monoxide may result causing property
damage, personal injury or loss of life. The qualied
service agency performing this work assumes
responsibility for the proper conversion of this
appliance with this kit.
1. All work must be performed by a fully qualified,
experienced, and trained service technician. It is the
responsibility of the installer to follow all instructions.
Failure to follow these instructions could result in
serious injury or property damage.
2. The qualied agency performing the work assumes
responsibility for the conversion.
3. CAUTION: The gas supply should be shut off prior to
disconnecting the electrical power. Both the gas and
electrical supply must be off prior to starting the conversion.
4. Wear safety glasses.
5. Be sure of ladder placement. Do not allow people to
stand below or around the area where the work is
being performed. Do not lean ladders or equipment
against the heater at any time during the conversion.
Figure 20 - Gas Train Assembly
MIXING CHAMBER
ORIFICE NIPPLE
ELBOW
REPLACE THE ORIFICES (see Figure 20)
6. Remove the four screws holding the access panel
and remove the panel.
7. Using the proper size wrench, loosen the 1/2 inch
upper ex line union that is attached to the mixing
chamber assembly (see Figure 20).
8. Using a Phillips screw driver, remove the 6 screws that
attach the mixing chamber to the combustion blower.
9. Place mixing chamber on at surface and unthread the
90 degree elbow from orice nipple. Then unthread
the orice nipple from the mixing chamber. Keep the
original orice separate from the new orice at all times.
NOTE: Orice should be sizes shown in the Table 6. All
Propane (LP) gas orices are painted red.
Table 6 - Main Burner Orice Schedule
Type of GasNaturalPropane
*Input in
1000 BTU
100Orice Drill Size0.282 in.0.213 in.
200Orice Drill Size0.282 in.0.213 in.
300Orice Drill Size0.266 in.0.228 in.
400Orice Drill Size0.323 in.6.6 mm
* This schedule is for units operating at altitudes of 2,000 feet (610 m) or less.
See GAS INPUT RATE section and Table 10 for eld deration information.
Heating Value
1,050 BTU/Ft
(39.1 MJ/m3)
3
2,500 BTU/Ft
(93.1 MJ/m3)
3
10. Ensure that the number stamped on the orifice
matches the size listed in Table 6. Apply pipe sealant
to the threads of the new orice nipple and thread into
mixing chamber.
11. Thread the 90 degree elbow and are union onto the
orice nipple.
12. Re-install the mixing chamber on the combustion
blower ensuring the O-ring gasket is secure in the
combustion blower groove. Align and tighten the ex
line union to the mixing chamber assembly.
FLEX HOSE
CAT-10119B
OPERATION
13. To adjust gas valve:
a. For size 100 and 200 units, using a 2.5mm
wrench turn the set screw on the gas valve high
re adjustment clockwise when converting to LP
and counter clockwise when converting to natural
gas (see Figure 21A).
b. For size 300 and 400 units, remove gas valve
adjustment cover using a at head screwdriver, turn
gas valve adjustment counterclockwise to convert
to LP gas and clockwise to convert to natural gas
(see Figure 21B).
23
Page 24
GAS CONVERSION
Figure 21A – Gas Valve Adjustment Locations
(Sizes 100/200)
Low Fire
Adjustment
High Fire
Adjustment
Figure 21B – Gas Valve Adjustment Location
(Sizes 300/400)
Figure 21C – Run% Potentiometer on Control Board
Run % Potentiometer
24
Page 25
GAS CONVERSION
14. Turn the set screw open to the number of turns listed
in Table 7.
a. For Propane (LP) Gas units:
• For size 100/200 units, turn adjustment
clockwise to the number of turns shown.
• For size 300/400 units, turn adjustment
counterclockwise to the number of turns
shown. Replace gas valve adjustment cover.
b. For Natural Gas units:
• For size 100/200 units, turn adjustment
counterclockwise to the number of turns
shown.
• For size 300/400 units, turn adjustment
clockwise to the number of turns shown.
Replace gas valve adjustment cover.
18. Adjust the RUN % potentiometer to 33% for low re.
Ensure the low re CO2 is within the range shown
in Table 8. NOTE: the low re should not have to
be adjusted if the orice is properly installed. If
low re is outside of the range shown in Table 8,
please contact Technical Support to troubleshoot
the unit.
19. Check all joints for leaks using a soap solution. Never
use an open ame to check for gas leaks.
20. Apply conversion plate and label to inner side of the
gas valve access panel. The conversion plate must be
installed as closely as possible to the existing heater
rating plate.
15. Turn on gas and electrical supply.
16. Fire the unit using the Start-Up procedure in the
OPERATION section of this manual.
17. Adjust the RUN % potentiometer to 100% for high re.
Ensure the high re CO2 is within the range shown in
Table 8.
25
Page 26
OPERATION – HIGH EFFICIENCY PROPELLER UNITS DIRECT SPARK IGNITION
EXPLANATION OF CONTROLS:
1. The unit heater is equipped with a power vent
system that consists of a combustion motor and
blower, power venter motor and blower, pressure
switches, and sealed flue collector in place of the
conventional power venter system.
2. The combustion air motor and power venter
motor are energized by the room thermostat, or
by commands from the Master unit, through the
integrated control board when a demand for heat
is sensed. During this 35 second pre-purge the
pressure switch is made and pressure is increased
to the correct ignition point.
The pressure switch MUST NOT
be bypassed. The unit MUST NOT be red unless
the combustion blower and power venter are
operating. An unsafe condition could result.
3. The direct spark ignition system consists of an
ignition control module and a gas valve. When the
pre-purge period ends, the spark ignition system is
energized, and the gas valve opens to supply gas
to the burners. The trial period for ignition will be 7
seconds.
a. If the unit fails to light in the trial period, the unit
will immediately enter the post-purge period.
Following the post-purge period, the unit will
follow the same pre-purge period and try to light
again. If the unit fails to light 3 times in a row, the
unit will enter a soft lockout for up to 1 hour. If
after 1 hour, the call for heat is still present, the
unit will begin the ignition sequence again.
4. Once the ignition is proved, propeller fan is enabled.
5. The burner will maintain a constant firing rate
for 60 seconds then modulate according to the
control mode selected and/or rate percentage
potentiometer.
6. The unit will run single stage, two stage or
modulation based on the DIP switch setting on the
control board: (See Figure 22 and Tables 9A and 9B)
a. 1 Stage Thermostat Operation Stand Alone:
A thermostat will determine how the unit runs. A
Fan Only (G) demand will cause the unit to run
its propeller fan only. A heat demand (W1) will
cause the unit to run at the input set by the Run
potentiometer (Run %).
b. 2 Stage Thermostat Operation Stand Alone:
A thermostat will determine how the unit runs. A
Fan Only (G) demand will cause the unit run its
propeller fan only. A rst stage demand (W1) will
cause the unit to run at the minimum input set by
the Run potentiometer (Run %). A second stage
call (W2) will cause the unit to run at 100%.
c. Thermostat Operation, Networked: A thermostat
will determine how all units run. A Fan Only
(G) demand will cause the Master to run its
propeller fan only. A rst stage demand (W1) will
cause the Master to run at the minimum input. A
second stage call (W2) will cause the Master to
run at 100%. The Master will broadcast all calls
and its re rate to all Members. All Member units
will run at the broadcast input level.
• The MASTER Switch must be ON for the Master.
• All units must be connected using the Network
communication ports.
• The GLOBAL DIP Switch must be set to ON for
Members.
• Each Member uses its own RUN potentiometer
(Run %) for the lowest input level.
Note – If the broadcast input level is below
any Member’s Run potentiometer setting,
that Member will run at its Run potentiometer
setting.
d. Outside Air Reset Operation: A W1 call will
cause the unit to run at an input determined
by the outside air temperature and the unit’s
selected design temperature.
I. OA Reset Standalone: The design temperature
will be set by adjusting the temperature
potentiometer (Design T/Space SP). At this
temperature (and below) the unit will run at
100% input. When the OA temperature is
equal to, or greater than, 65°F (18.3°C) the
unit will run at the minimum allowable input.
When the OA is between 65°F (18.3°C) and the
design temperature, the unit will run at the input
corresponding to the linear relationship of these
2 points. A W2 call will cause the unit to run at
100% input.
• The OA DIP Switch must be ON to run in
this OA Reset mode.
• An outdoor air temperature sensor is
required. Note: If the unit was ordered with
a modulating gas control with outside air
reset (Direct Spark Gas Control [GC] option
1), the outside air temperature sensor is
factory provided for eld installation.
• The minimum input is set with the RUN
potentiometer (Run %).
• The Design Temperature is set with the
temperature potentiometer (Design T/Space
SP).
Note – If an outdoor air temperature sensor is
not installed, or it is faulted, the unit will run at
the Run potentiometer (Run%) setting when a
W1 call is received.
26
Page 27
OPERATION – HIGH EFFICIENCY PROPELLER UNITS DIRECT SPARK IGNITION
(continued)
II. OA Reset Networked, Global enable
Similar to OA Reset standalone, a W1 call will
cause the Master to run at an input determined
by the outside air temperature and the Master’s
selected design temperature. The Master will
broadcast the W1 call and its calculated input
to all Members. All Member units will run at the
broadcast input level.
• The Master unit requires an outdoor air
temperature sensor. Note: If the unit was
ordered with a modulating gas control
with outside air reset (Direct Spark Gas
Control [GC] options 1 or 2), the outside air
temperature sensor is factory provided for
eld installation.
• The OA DIP Switch and MASTER DIP
Switch must be ON for the Master.
• The GLOBAL DIP Switch must be set to ON
for Members.
• Each Member uses its own RUN potentiometer
(Run %) for the lowest input level.
• All units must be connected using the
Network communication ports.
Note – Only one Master unit is required when
networking multiple units together.
Note – If an outdoor air temperature sensor
is not installed on the Master, or it is faulted,
the Master will run at, and broadcast, its RUN
potentiometer (Run %) setting.
Note – If the broadcast input level is below
any Member’s RUN potentiometer setting, that
Member will run at its Run potentiometer setting.
Note – In this mode all units will run at 100%
if the Master is given a W2 call.
Note – In this mode all units will run in fan only
mode if the Master is given a G call.
III. OA Reset Networked, Individual enable
The Master unit will broadcast the OA
temperature to all the units. A local W1 call
will cause the individual unit to run at an input
determined by the broadcasted outside air
temperature and its selected design temperature,
as in the OA Reset Stand-alone mode.
• The Master unit requires an outdoor air
temperature sensor. Note: If the unit was
ordered with a modulating gas control
with outside air reset (Direct Spark Gas
Control [GC] options 1 or 2), the outside air
temperature sensor is factory provided for
eld installation.
• The OA DIP Switch and Master DIP Switch
must be ON for the Master.
• The OA DIP Switch must be ON for all Members.
• All units must be connected using the
Network communication ports.
Note – Only one Master unit is required when
networking multiple units together.
Note – If an outdoor air temperature sensor is
not installed on the Master, or it is faulted, the
units will run at the local RUN potentiometer
setting.
e. Indoor Air Reset Operation: The unit offers a
unique approach to output regulation, and energy
efciency. With its Indoor Air Reset function, the
control monitors its heat demands, watching
the demand frequency and duration. Over time,
the unit control anticipates the system needs. It
sets its input level to provide only as much heat
as needed to fine-tune and normalize the heat
output. All that is required to enable IAR is to
connect thermostat wires to the inputs. The unit
control can also be congured for outdoor reset
operation, but IAR provides response based
on system behavior rather than just looking at
outdoor temperature.
I. Indoor Air Reset Stand-alone: A W1 call will
cause the unit to run at an input determined
by the IAR value calculated by how often, and
how long it has recently run.
• The IAR DIP Switch must be ON to run in
this mode.
• The minimum input is set with the RUN
potentiometer (Run %).
II. Indoor Air Reset Networked, Global enable:
A W1 call will cause the Master to run at an
input determined by its IAR value. The Master
will broadcast the W1 call and its calculated
input to all Members. All Member units will run
at the broadcast input level.
• The IAR DIP Switch and MASTER DIP
Switch must be ON for the Master.
• The GLOBAL DIP Switch must be set to ON
for Members.
• Each Member uses its own RUN potentiometer
(Run %) for its lowest input level.
• All units must be connected using the
Network communication ports.
Note – If the broadcast input level is below
any member’s RUN potentiometer setting,
that member will run at its Run potentiometer
setting.
Note – In this mode all units will run at 100%
if the Master is given a W2 call.
Note – In this mode all units will run in fan only
mode it the master is given a G call.
27
Page 28
OPERATION – HIGH EFFICIENCY PROPELLER UNITS DIRECT SPARK IGNITION
(continued)
f. Space Temperature Operation: The unit
will modulate from 100% fire to the minimum
input set by the Run potentiometer (Run %)
in order to maintain the setpoint of the space
temperature sensor.
I. Space Temperature, Stand-alone: A W1
call will cause the unit to run at an input
determined by the Space Temperature
Setpoint potentiometer (Design T/Space SP),
and the current Space Temperature reading.
A 4 degree Fahrenheit deadband (+2/-2) and
run potentiometer (Run %) control are used to
determine when the unit res and the input at
which it runs.
• Both the OA DIP and IAR DIP Switch must
be ON to run in this mode.
• A space temperature sensor is required.
Note: If the unit was ordered with a
modulating gas control with room sensing
(Direct Spark Gas Control [GC] option 5),
the space temperature sensor is factory
provided for eld installation.
• The minimum input is set with the RUN
potentiometer (Run %).
Note – A W1 Demand is required to enable
the unit in this mode.
Note – If a space temperature sensor is not
installed, or it is faulted, the unit will run at the
RUN potentiometer setting.
II. Space Temperature Networked, Global
enable: A W1 call will cause the Master to run at
an input determined by the Space Temperature
Setpoint potentiometer (Design T/Space SP),
and the current Space Temperature reading.
When the Master determines it should fire
based on the setpoint and space temperature,
it will broadcast the call and its calculated input
to all Members. All Member units will run at the
broadcast input level.
• The Master unit requires a space temperature
sensor. Note: If the unit was ordered with a
modulating gas control with room sensing
(Direct Spark Gas Control [GC] option 5), the
space temperature sensor is factory provided
for eld installation.
• The OA DIP and IAR DIP Switches as well
as the MASTER Switch must be ON for the
Master.
• The GLOBAL DIP Switch must be set to ON for
Members.
• Each Member uses its own RUN potentiometer
(Run %) for the lowest input level.
• All units must be connected using the Network
communication ports.
Note – If the broadcast input level is below
any Member’s RUN potentiometer setting,
that Member will run at its Run potentiometer
setting.
Note – In this mode all units will run at 100% if
the Master is given a W2 call.
Note – In this mode all units will run in fan only
mode if the Master is given a G call.
g. 2-10 VDC/4-20 mA Input: The ring rate of the
unit can be controlled by a remote 4-20 mA or
2-10 VDC signal.
I. 2-10 VDC/4-20 mA Modulation Stand-alone:
An AUX call will cause the unit to run at an
input determined by the 2-10 VDC/4-20 mA
input. A value of 10 VDC/20 mA will cause the
unit to run at 100% and a value of 2 VDC/4 mA
will cause the unit to run at the minimum input.
• The VDC/mA Switch and jumper need to be
set for the correct signal type.
• The minimum input is set with the RUN
potentiometer (Run %).
II. 2-10 VDC/4-20 mA Modulation Networked:
An AUX call will cause the Master to run at an
input determined by the 2-10 VDC/4-20 mA
input. A value of 10 VDC/20 mA will cause the
unit to run at 100% and a value of 2 VDC/4
mA will cause the unit to run at the minimum
input. The Master will broadcast the call and
its calculated input to all Members. All Member
units will run at the broadcast input level.
• The MASTER Switch must be ON for the
Master.
• The GLOBAL DIP Switch must be set to ON
for Members.
• Each Member uses its own RUN potentiometer
(Run %) for the lowest input level.
• All units must be connected using the
Network communication ports.
Note – If the broadcast input level is below
any Member’s RUN potentiometer setting,
that Member will run at its Run potentiometer
setting.
Note – In this mode all units will run at 100% if
the Master is given a W2 call.
Note – In this mode all units will run in fan only
mode if the Master is given a G call.
28
Page 29
OPERATION – HIGH EFFICIENCY PROPELLER UNITS DIRECT SPARK IGNITION
(continued)
h. Modbus Control: The operation of the unit can
be controlled by remote Modbus commands
over RS485. See the Modbus Register list
(Appendix A) for more information.
I. Modbus Control, Stand-alone: By writing to the
BMS Mode data point and the BMS Input data
point, a BMS System can control the operation
of the unit. The operational status of the unit can
also be read using other Modbus data points.
• The unit must be connected to the BMS
using the RS485 Modbus port.
• The minimum input is set with the RUN
potentiometer (P1).
II. Modbus Control, Networked: Modbus
commands will determine how the all the
units will run. By writing to the BMS Mode
and BMS Input, a BMS System can control
the operation of the Master. The Master will
broadcast all calls and its input requests to all
the Members. All Member units will run at the
broadcast input level. The operational status
of the Master can also be read.
• The Master unit must be connected to the
BMS using the RS485 Modbus Port.
• The MASTER Switch must be ON for the
Master.
• The GLOBAL DIP Switch must be set to ON
for Members.
• Each Member uses its own RUN
potentiometer (P1) for the lowest input level.
• All units must be connected using the
Network communication ports.
OPERATION – HIGH EFFICIENCY PROPELLER UNITS DIRECT SPARK IGNITION
(continued)
7. The high limit switch interrupts the ow of electrical
current to the ignition control and gas valve,
interrupting the ow of gas to the gas burner if the
unit heater becomes overheated.
8. The rollout switch interrupts the flow of the electrical
current to the ignition control and gas valve, interrupting
the ow of gas to the gas burner if the temperature of the
burner compartment exceeds rollout set point. If the rollout
switch trips, the combustion, inducer and supply fans will
continue to run until the rollout switch is manually reset.
9. The flue temperature limit interrupts the flow of
electric current to the ignition control and gas valve,
interrupting the ow of gas to the gas burner if the
ue temperature exceeds ue temp limit.
10. Once the thermostat is satised, or the high limit or
ue temperature limit interrupts the ow of electric
current to the control board, the unit will begin a 60
second post-purge period. When the post-purge
period ends, the propeller fan, combustion blower
and power venter motor are de-energized.
11. The wall thermostat, supplied optionally, is a
temperature sensitive switch that operates the vent and
ignition system to control the temperature of the space
being heated. The thermostat must be mounted on a
vertical, vibration-free surface free from air currents
and in accordance with the furnished instructions (see
also the ELECTRICAL CONNECTIONS section).
START-UP (Also refer to lighting instruction plate
equipped on the unit)
1. Open the manual gas valve in the gas supply line to
the unit heater. Loosen the union in the gas line to
purge it of air. Tighten the union and check for leaks.
Never use an open flame to
detect gas leaks. Explosive conditions may exist
which could result in personal injury or death.
2. Open the manual valve on the unit heater.
3. Set control mode DIP switches #1-5 to OFF. Disconnect 2-10 VDC wires, if applicable.
4. Turn ON the electrical power.
6. Set (Run %) potentiometer to 100% on the control board
to force the unit to high re. Turn clockwise (100).
7. It may take a few minutes for the unit to modulate, but
once in high re, measure the supply gas pressure and
record. Supply gas pressure should be 5.0 to 14.0" W.C.
for natural gas, 8.0 to 14.0" W.C. for propane (LP) gas.
8. Place a combustion analyzer in the ue pipe. Carbon
dioxide (CO2) should be within the range shown in Table
8. Carbon monoxide (CO) values will vary depending
on ue pipe length, but CO should always be below 60
PPM. If CO/CO2 values are not within the given range:
a . F o r u n i t s i z e s 10 0 / 2 0 0, a d j u s t h i g h r e a d j u s t m e n t
on gas valve until it is within range. Adjustments
should be made with small increments, a quarter
(1/4) turn at a time. Clockwise rotation decreases
input, counter clockwise increases input.
b. For unit sizes 300/400, adjust gas valve adjustment
on gas valve until it is within range. Adjustments
should be made with small increments, a quarter
(1/4) turn at a time. Counter clockwise rotation
decreases input, clockwise increases input.
9. Turn the (Run %) potentiometer counter clockwise
(33) to force the unit to low re.
10. Measure CO/CO2 using a combustion analyzer. CO2
should be within the range shown in Table 8. CO
values will vary depending on ue pipe length, but CO
should always be below 60 PPM. If CO/CO2 values
are not within the given range:
a. For unit sizes 100/200, adjust low re adjustment
on gas valve until it is within range. Adjustments
should be made with small increments, a quarter
(1/4) turn at a time. Clockwise rotation increases
input, counter clockwise decreases input.
b. For unit sizes 300/400, adjust gas valve adjustment
on gas valve until it is within range. Adjustments
should be made with small increments, a quarter
(1/4) turn at a time. Counter clockwise rotation
increases input, clockwise decreases input.
11. Remove the call for heat between R and W1.
12. Turn the thermostat to the lowest point and determine
that the combustion blower and power venter motors
shut off and the burners are extinguished.
5. The unit should be under the control of the thermostat.
Turn the thermostat to the highest point and determine
that the combustion blower and power venter motors
start beginning pre-purge. After 30 seconds, the
orange ignition LED should be ashing (on the control
board located in the control box), burners will ignite
and unit will run at this ignition period for one minute.
The orange ignition LED will become solid.
13. Set control mode DIP switches to the desired control
mode and turn the thermostat to the desired position.
Reconnect 2-10 VDC wires, if applicable.
SHUT DOWN
1. Turn the valve selector lever to the “OFF” position.
2. Turn off the electricity.
3. To relight, follow START-UP instructions.
30
Page 31
GAS INPUT RATE
Check the gas input rate as follows (Refer to
GENERAL SAFETY INFORMATION section for metric
conversions):
Never over-re the unit heater, as this
may cause unsatisfactory operation, or shorten the
life of the heater.
1. Turn off all gas appliances that use gas through the
same meter as the unit heater.
2. Turn the gas on to the unit heater.
3. Clock the time in seconds required to burn 1 cubic foot
of gas by checking the gas meter.
4. Insert the time required to burn one cubic foot of gas
into the following formula and compute the input rate.
3600 (Sec. per Hr.) X BTU/Cu. Feet = Input Rate
Time (Sec)
For example:
Assume the BTU content of one cubic foot of gas is 1000,
and that it takes 18 seconds to burn one cubic foot of gas.
3600 X 1000 = 200,000
18
NOTICE: If the computation exceeds, or is less than
95% of the unit’s gas BTU/hr. input rating, adjust the
gas valve.
NOTICE: See Table 6 for gas orice sizes.
HIGH EFFICIENCY UNIT HEATER – HIGH ALTITUDE
DERATION
This high efciency unit heater has been manufactured
utilizing standard burner orices and gas pressure setting
as per the specications shown on the unit rating plate.
The main control board on the unit will automatically
adjust for altitude without the need to adjust gas pressure,
pressure switches or orice sizes.
Note: Table based on heating value of 1,050 BTU/ft3 at sea level (Natural
Gas) or 2,500 BTU/ft3 at sea level (Propane). Consult local utility for
actual heating value. Derate based on measured and tested values at
altitude and reects actual unit performance changes.
MODBUS CONFIGURATION
Figure 23 - Control Board - Modbus Dip Switches
Dip Switch #1 = Memory or DIP Switches
Dip Switch # 2 = Baud
Dip Switch #3-4 = Data Format
Dip Switch #5-8 = Modbus Address
DIP #1 - Memory or DIP Switches
DIP #1Modbus strings used
OFFDip Switch Values
ONValues stored in memory – see Modbus Register list
DIP #2 - BAUD
DIP #2Baud Rate
OFF19200
ON38400
DIP #3 & #4 Data Format
DIP #3 - FRMT0DIP #4 - FRMT1 Data Format
OFFOFF8E1
OFFON8N1
ONOFF8O1
ONON8N2
DIP #5 – #8 Address 1 – 15 Binary (0 is not a valid
Modbus address reserved for broadcast)
Ø
TO POWER VENTER
PRESSURE SWITCH, HIGH
PRESSURE TAP
TEE, 1/8" X 1/8" X 1/4" ID
Ø
FITTING ON FLUE
COLLECTOR
Ø 1/8" TUBING
O PRESSURE
RANSDUCER LOW
PRESSURE TAP (BACK)
CAP, FLEX, 3/16"-1/4" OD.
MANIFOLD, AIR
Ø
1/8" TUBING
TO GAS VALVE PRESSURE TAP ON
SIZE 100-200 UNITS. CONNECTION
IS CAPPED ON SIZE 300 - 400 UNITS
Ø 3/16" TUBING
TEE, 1/4" ID
CAT-10120B
Ø 3/16" TUBING
TO POWER VENTER
PRESSURE SWITCH,LOW
PRESSURE TAP
3/16
" TUBING
Ø
TO BLOCKED INLET
PRESSURE SWITCH
32
Page 33
HIGH EFFICIENCY GAS-FIRED UNIT HEATER TROUBLESHOOTING GUIDE
SYMPTOMSPOSSIBLE CAUSE(S)CORRECTIVE ACTION
A. Yellow tip ame (some
yellow tipping on LP
gas is permissible).
B. Floating ame.1. Insufcient combustion air.
C. Gas odor.1. Shut off gas supply immediately!
D. Delayed ignition.1. Improper ground.
E. Failure to ignite.1. Gas supply is off.
F. Burners will not shut off. 1. Thermostat located incorrectly.
G. Rapid burner cycling.1. Loose electrical connections at thermostat
H. Noisy power venter.1. Power venter wheel loose.
I. Fan will not run.1. Loose electrical connections.
J. Fan motor turns on
and off while burner is
operating.
1. Clogged air inlet lter.
2. Clogged main burners.
3. Insufcient combustion air.
4. Possibly over red.
2. Air leak into combustion chamber or
inducer failure.
2. Leaking port on valve.
3. Blocked heat exchanger.
4. Blocked ue collector.
5. Negative pressure in the building.
2. Bad or broken spark cable.
3. Faulty control.
4. Pressure regulator set too low.
5. Main burner and/or orice dirty.
6. Improper venting.
2. No power supply to unit.
3. Thermostat not calling.
4. Defective high limit.
5. Defective drafter prove switch.
6. Loose wiring.
7. Improper ground.
8. Improper thermostat or transformer wiring.
9. Condensate trap clogged or leaking.
10. Defective ignition control.
11. Cap off pressure tubing
2. Improper thermostat wiring.
3. Shorted circuit.
4. Defective sticking gas valve.
5. Excessive gas supply pressure.
or gas valve.
2. Excessive thermostat heat anticipator
setting.
3. Unit cycling on high limit.
4. Poor thermostat location.
5. An improper ground.
2. Power venter wheel is dirty.
3. Power venter wheel is rubbing on the
housing.
2. Defective motor or overload.
3. Defective control board.
4. Defective fan relay.
1. Motor overload protection is tripping.
2. Loose wiring or connection.
3. Control board is defective.
1. Clean lter.
2. Clean mesh burner.
3. Insufcient combustion air.
4. Check CO2.
1. Clean combustion air inlet openings or lter.
2. Determine cause and repair accordingly.
1. Inspect all gas piping and repair.
2. Check to ensure valve ports are seated.
3. Clean heat exchanger/ue.
4. Clean ue collector.
5. See INSTALLATION.
1. Check grounding wires and spark bracket connections.
2. Inspect spark cable connections and cuts.
3. Check to ensure spark is energized after pre-purge period.
4. Test and reset manifold pressure refer to OPERATION.
5. Clean orice or burners.
6. Refer to INSTALLATION.
1. Open all manual valves “check for leaks”.
2. Turn on power supply, check fuses and replace if bad.
3. Turn up thermostat, Check for 24V on terminals R and W1
on terminal strip.
4. Check switch for continuity if open with no heat present,
replace.
5. Check switch operation to ensure switch closes after
drafter purge period. If it does not make/check tubing
connections/ blockage.
6. Check all wiring per diagram.
7. Check all ground wires and connections.
8. Check both, for wiring according to diagram; check for
24V at gas valve terminals during trial for ignition period if
present and valve does not open. Replace valve.
9. Clean condensate trap.
10. Replace ignition control
11. Re-install cap on tubing.
1. Relocate thermostat away from outside wall or drafts.
2. Check thermostat circuit for open and close on terminal
strip on heater “R” and “W”.
3. Check thermostat circuit for shorts, staples piercing wires.
4. Check for 24V on gas valve terminals when thermostat is
not calling.
5. Refer to INSTALLATION.
1. Tighten all electrical connections.
2. Adjust heat anticipator setting for longer cycles. Refer to
ELECTRICAL CONNECTIONS.
3. Check for proper air supply across heat exchanger and
proper gas supply.
4. Relocate thermostat.
5. Refer to INSTALLATION.
1. Replace or tighten.
2. Clean power venter wheel.
3. Realign power venter wheel.
1. Check and tighten wires on fan circuit.
2. Test for 115V on terminal ACB Heat and “L2” if voltage is
present replace motor.
3. Test for 115V on terminal ACB Heat and “L2” on the control
board, if voltage is not present 45 seconds after trial for
ignition replace board.
4. Check for 24 volts on terminals 24 and 0. Check for 115V
on normally open relay contact when calling.
1. Check motor amps against motor name plate, check
voltage, replace if found defective.
2. Check for 115V between motor leads.
3. Check terminal 24 and 0 for 24 volts. If voltage is not
constant, replace control board.
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SYMPTOMSPOSSIBLE CAUSE(S)CORRECTIVE ACTION
K. Fan will not stop.1. Control Board is in ame failure mode.
2. Fan improperly wired.
3. Defective board.
4. Defective fan relay.
5. High limit trip.
L. Not enough heat.1. Incorrect gas input.
M. Too much heat.1. Unit is over red.
N. Cold air is delivered
during heater operation.
O. High limit tripping.1. Unit is over red.
P. Power venter will not
run.
Q. Power venter turns
on and off during
operation.
R. Power venter will not
stop.
S. Combustion Blower will
not run.
T. Combustion Blower
turns on and off during
operation.
U. Combustion Blower will
not stop.
V. Flue Temperature
Switch tripping.
2. Heater undersized.
3. Thermostat malfunction.
4. Heater cycling on limit.
5. Incorrect orice size.
2. Thermostat malfunction.
3. Heater runs continuously.
4. Control board congured for incorrect size.
1. Incorrect gas input.
2. Air throughput too high.
2. Air ow is low.
3. Defective switch.
4. Defective control board.
1. Loose wiring or connections.
2. Motor overload is tripped or bad motor.
3. Bad control board.
1. Power venter improperly wired.
2. Motor overload cycling or defective motor.
3. Defective control board.
4. Unit not reaching proper delta pressure.
1. Power venter improperly wired.
2. Main burner did not light on call for heat.
3. Defective control board.
1. Loose wiring or connections.
2. Motor overload is tripped or bad motor.
3. Defective control board.
1. Combustion Blower improperly wired.
2. Motor overload cycling or defective motor.
3. Defective control board.
1. Combustion Blower improperly wired.
2. Main burner did not light on call for heat.
3. Defective control board.
1. Unit over red.
2. Blocked heat exchanger
3. Blocked combustion air or ue vent pipe.
4. Clogged heat exchanger coil.
1. Turn 115V power off to the unit, wait 10 seconds and
reapply voltage to the unit.
2. Check wiring of fan circuit to wiring diagram.
3. If unit is not calling for heat and board is not in a ash code
mode, replace board.
4. Check for 0 volts on terminals 24 and 0. Check for 0 on
normally open relay contact when calling.
5. See High Limit Tripping in troubleshooting section.
1. Refer to OPERATION.
2. Is the heater output sized correctly for heat loss of the
space. Has the space been enlarged.
3. Check thermostat circuit, 24V on terminals “R” and “W” on
terminal strip.
4. Check air movement across heat exchanger. Check
voltage and amps at the fan motor. Check gas input to
ensure unit is not over red. Check heat exchanger to
ensure unit is not dirty.
5. Check orice size, replace if undersized.
1. Refer to OPERATION. Check orice size. If too big replace.
2. Check thermostat for operation, to ensure circuit open and
closes.
3. Check wiring per diagram; check operation at the gas
valve, look for a short in thermostat circuit.
4. Check control board dip switch conguration.
1. Refer to OPERATION.
2. Refer to OPERATION.
1. Burner orices may be too large, verify and replace.
2. Check for proper voltage, ensure fan blade is correct and
free of debris.
3. Check operation of switch, did the switch open when unit is
running or is the switch open during start-up.
4. Check for 24V on line side of the high limit. Constant
voltage should be recorded if not control board is suspect.
Check ash code.
1. Check all wring in the power vent circuit to ensure good
connection, including “Neutral”.
2. Check for 115V between motor leads and check amp draw
of motor. Replace if needed.
3. Check for continuous 115V on molex plug on inducer and
neutral during call for heat. If not present and all checks
are normal, replace.
1. Check power venter circuit per wiring diagram.
2. Check motor voltage and amp draw to motor name plate,
replace if motor found defective.
3. Check for continuous 115V on terminal molex plug during
call for heat, replace board if found defective.
4. Check pneumatic tubing and vent pipe for blockages.
Check condensate trap for proper seal.
1. Check power venter circuit per wiring diagram.
2. Heater is in lockout mode check ash code table for problem.
3. No ash codes present along with no call for heat, replace
control board.
1. Check all wring in the power vent circuit to ensure good
connection, including “Neutral”.
2. Check for 115V between motor leads and check amp draw
of motor. Replace if needed.
3. Check for continuous 115V between black and white
wires on molex plug and neutral during call for heat. If not
present and all checks are normal, replace.
1. Check Combustion Blower circuit per wiring diagram.
2. Check motor voltage and amp draw to motor name plate,
replace if motor found defective.
3. Check for continuous 115V between black and white wires
on molex plug of combustion blower during call for heat,
replace board if found defective.
1. Check Combustion Blower circuit per wiring diagram.
2. Heater is in lockout mode check ash code table for problem.
3. No ash codes present along with no call for heat, replace
control board.
1. Refer to operation section.
2. Clean heat exchanger/ue collector.
3. Clean combustion air or ue vent pipe.
4. Clean heat exchanger coil ns.
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Page 35
HIGH EFFICIENCY GAS-FIRED UNIT HEATER TROUBLESHOOTING WITH LED
INDICATOR ASSISTANCE
No Cycling or appliance power or thermostat call for heat since appliance failure has occured.
Line voltage power can cause product damage, severe injury or death. Only a trained experienced
service technician should perform this trouble-shooting.
1. Check the system thermostat to make sure it is calling for heat. (Do not cycle the thermostat on and off at this time.)
2. Observe the LED indicator on the bottom panel of the unit (red or orange LED off indicates no faults); check and
repair system as noted in the chart below.
NOTICE: Air ow proving switch and power venter hose barbs must be free of any dust or debris at all times.
Periodically check these openings and/or if any problems occur.
LED STATUSINDICATESCHECK/REPAIR
Red LED – OffNo FaultsNot Applicable.
Red LED – SolidIgnition Lockout Fault1. Gas supply off or gas supply pressure too low.
Red LED – 1 FlashFlue Limit Fault1. Obstruction or restriction in combustion air inlet or ue outlet.
Red LED – 2 FlashRollout Switch Fault1. Obstruction or restriction in combustion air inlet or ue outlet.
Red LED – 3 FlashHigh Limit Switch Fault1. Gas supply off or gas supply pressure too high.
Red LED – 4 FlashInlet Pressure Switch Fault1. Obstruction or restriction in combustion air inlet.
Red LED – 5 FlashCondensate Float Switch Fault 1. Obstruction or restriction in condensate system.
Red LED – 6 FlashFlue Pressure Switch Fault1. Obstruction or restriction in combustion air inlet or ue outlet.
Red LED – 7 FlashUser Interlock Fault1. Open interlock; broken, or miswired connection.
LED STATUSINDICATESCHECK/REPAIR
Red LED – Solid
O r a n g e L E D – 1 F l a s h
Red LED – Solid
Orange LED – 2 Flash
Red LED – Solid
Orange LED – 3 Flash
Orange LED – 1 FlashOpen OA Sensor Warning1. Check sensor is properly installed and wired.
Orange LED – 2 FlashShorted OA Sensor Warning1. Check sensor is properly installed and wired.
Orange LED – 3 FlashOpen Space Sensor Warning1. Check sensor is properly installed and wired.
Orange LED – 4 FlashShorted Space Sensor Warning 1. Check sensor is properly installed and wired.
Pressure Transducer Fault1. Tubing is cracked, broken, or blocked by moisture or debris.
3. Gas valve switch is off or wires are not connected.
4. Broken or cracked porcelain on either sensor or ignitor.
2. Unit is over-red.
3. Control board fault or faulty switch.
4. Power venter is not working properly or producing correct delta pressure.
2. Unit is over-red.
3. Control board fault or faulty switch.
4. Power venter is not working properly or producing correct delta pressure.
2. Unit is over-red.
3. Blocked heat exchanger.
4. Power venter is not working properly.
5. Fan motor(s) or switch(es) failure.
2. Tubing connection to switch is cracked or broken.
3. Faulty power venter or switch.
2. Float switch miswired or failure.
3. If applicable, condensate pump miswired or failure.
2. Tubing is cracked, broken, or blocked by moisture or debris.
3. Blocked heat exchanger.
4. Power venter is not working properly or producing correct delta pressure.
5. Faulty control board, pressure transducer, or switch.
2. Faulty control board.
2. Faulty transducer or control board.
3. Power venter not working properly or producing correct delta pressure.
4. Blockage in ue.
2. Faulty control board.
2. Faulty control board.
2. Sensor failure.
2. Sensor failure.
2. Sensor failure.
2. Sensor failure.
NOTICE: For Rollout Switch Fault, the rollout switch must be manually reset before unit operation can
resume. If a Red LED-2 Flash is observed, the red button on the rollout switch will have to be depressed
to reset. This switch is located on the top of the burner compartment. The red button should be depressed
until an audible "click" is heard.
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Page 36
MAINTENANCE
PERIODIC SERVICE
NOTICE: The heater and vent system should be
checked once a year by a qualied technician.
All Maintenance/Service information should be recorded
accordingly on the GAS EQUIPMENT START-UP AND
INSPECTION SHEET provided in this manual.
Open all disconnect switches,
disconnect all electrical and gas supplies, and
secure in that position before servicing unit.
Failure to do so may result in personal injury or
death from electrical shock.
Gas tightness of the safety shutoff valves must be checked on at least an annual
basis. Failure to do so may result in death,
serious injury or substantial property damage.
To check gas tightness of the safety shut-off valves:
1. Turn off the manual valve upstream of the appliance
combination control.
2. Turn set screw of test port on gas valve counter
clockwise and connect a manometer to that tapping.
3. Turn the manual valve on to apply pressure to the
combination control.
4. Note the pressure reading on the manometer, then
turn the valve off.
5. A loss of pressure indicates a leak. If a leak is
detected, use a soap solution to check all threaded
connections.
6. If no leak is found, combination control is faulty and
must be replaced before putting appliance back in
service.
NOTICE: See separate operation manuals provided
with any unit accessories for their maintenance/
service requirements.
Should maintenance be required, perform the following
inspection and service routine:
1. Inspect the area near the unit to be sure that there is
no combustible material located within the minimum
clearance requirements listed in this manual.
Under no circumstances should
combustible material be located within the
clearances specified in this manual. Failure
to provide proper clearance could result in
personal injury or equipment damage from re.
2. Turn off the manual gas valve and electrical power
to the unit heater.
3. To clean or replace the burners, remove
burner mounting bracket nuts located in burner
compartment. Disconnect union between gas valve
and combustion blower. Lift burner assembly up and
pull away from heat exchanger to remove.
4. To remove any dirt, dust, or other foreign matter from
the burner box mesh, remove burner box cover plate
and use compressed air to clean the mesh burners
and inlet lter.
NOTICE: Do not use chemical cleaners. Chemical
cleaners may damage burner mesh or other
components.
5. The condensate trap can be cleaned by loosening
the union nut. The spring oat should be cleaned of
any debris.
6. Reassemble the unit heater by replacing all parts in
reverse order.
7. Check all gas control valves and pipe connections
for leaks.
Check all pipe joints for leakage
using a soap solution or other approved method.
Never use an open flame or severe personal
injury or death may occur!
8. Check the operation of the automatic gas valve by
lowering the setting of the thermostat, stopping the
operation of the unit. The gas valve should close tightly,
completely extinguishing the ame on the burners.
9. Inspect and service motor/fan assembly. To maintain
efcient air ow, inspect and clean the fan blades
and guard to prevent buildup of foreign matter.
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Page 37
LIMITED WARRANTY
High Efciency Propeller Unit Heaters
1. The "Manufacturer" warrants to the original owner at original installation site that the above model Gas-Fired
Heater ("the Product") will be free from defects in material or workmanship for (1) year from the date of shipment
from the factory, or one and one-half (1-1/2) years from the date of manufacture, whichever occurs rst. The
Manufacturer further warrants that the complete heat exchanger, ue collector, and burners be free from defects
in material or workmanship for a period of ten (10) years from the date of manufacture. If upon examination by
the Manufacturer the Product is shown to have a defect in material or workmanship during the warranty period,
the Manufacturer will repair or replace, at its option, that part of the Product which is shown to be defective.
2. This limited warranty does not apply:
a. if the product has been subjected to misuse or neglect, has been accidentally or intentionally damaged, has
not been installed, maintained, or operated in accordance with furnished written instructions, or has been
altered or modied in any way by any unauthorized person.
b. to any expenses, including labor or material, incurred during removal or reinstallation of the Product.
c. to any damage due to corrosion by chemicals, including halogenated hydrocarbons, precipitated in the air.
d. to any workmanship of the installer of the Product.
3. This limited warranty is conditional upon:
a. advising the installing contractor, who in turn noties the distributor or Manufacturer.
b. Shipment to the Manufacturer of that part of the Product thought to be defective. Goods can only be returned
with prior written approval of the Manufacturer. All returns must be freight prepaid.
c. determination in the reasonable opinion of the Manufacturer that there exists a defect in material or
workmanship.
4. Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with
respect to such repaired or replaced part beyond the stated warranty period.
5. THIS LIMITED WARRANTY IS IN LIEU OF ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, AND
ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND
EXCLUDED FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE
IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE
WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR
ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL
OWNER OF THE PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH
MAY VARY BY JURISDICTION.
In the interest of product improvement, we reserve the right to make changes without notice.
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Page 38
Figure 25 - Component Access
T
MACHINE SCREW, (3) M4x6 & (3) M6x6
IDENTIFICATION OF PARTS
Figure 26 - Flue Collector/Drafter Assembly
FLUE COLLECTOR ASSEMBLY
FLUE COLLECTOR GASKET
DRAFTER MOUNTING PLATE
HREADED HEX INSERT, #10-24
DRAFTER GASKET
CAT-10085A
SELF-DRILL SCREW, #8-18
MACHINE SCREW, #10-24
INDUCER
CAT-10089A
Figure 27 - Air Gas Inlet Assembly
MACHINE SCREW, #6-32
AIR-GAS INLET
COVER PLATE
INLET AIR
DISTRIBUTOR
HEX NUT,
SERRATED FLANGE,
1/4-20
O-RING
COMBUSTION BLOWER GASKET
CAT-10088B
COMBUSTION
BLOWER
NUT, FLANGED,
1/4-20
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Page 39
Figure 28 - Heat Exchanger Components
TURN COVER
COIL ASSEMBLY
COMBUSTION TUBE
TURBULATOR
COMBUSTION VESTIBULE
PANEL
TURN COVER GASKET
Figure 29 - Propeller Motor/Fan Assembly
OSHA FAN GUARD PLATE
OSHA FAN GUARD
RUBBER GROMMET
HARDWARE
TURN VESTIBULE PANEL
HARDWARE
CAT-10086B
FAN BLADE
MOTOR
HOW TO ORDER REPLACEMENT PARTS
Please send the following information to your local representative: if further assistance is needed, contact the
manufacturer's customer service department.
• Unit Number
• Serial Number
• Part Description and Number as shown in Replacement parts Catalog
CAT-10079A
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Page 40
APPENDIX A – MODBUS REGISTERS
Input/Output Variables (Read/Write)
Address NameRaw Data Type Scale DescriptionValid Values/Range
40001 Modbus Address8 bit unsigned–
40002 Modbus Baud8 bit unsigned–
40003 Modbus Data Format 8 bit unsigned–
40004 Modbus Mode8 bit unsigned–
40005 Modbus Input8 bit unsigned1.0
This Modbus Address is used if the Communications settings
location DIP is set to Memory
This Modbus Baud is used if the Communications settings
location DIP is set to Memory
This Modus Data Format is used if the Communications
settings location DIP is set to Memory
Modbus Mode. (see BMSTimer)
If no wired operating mode demands are present, setting
the state member of this variable will put the unit in the
corresponding mode.
Modbus Input (see BMSTimer)
If no wired operating mode demands are present, and the unit
is operating per the Modbus Mode variable, the unit will run at
this input.
Note – Writing 0 to this variable will allow the unit to run at the
input dictated by its local settings.
BMS Timer
The BMS timer is a BMS failsafe feature. This countdown
timer should be periodically reloaded with a timeout value (in
seconds). If the timer reaches zero, the control assumes that
the BMS is no longer operating, and clear the Modbus Mode
and Modbus Input values. This is a failsafe feature used to
help safeguard the system in case of BMS failure.
0 – 65535 seconds
When any Read/Write variable is written, if the BMS Timer is
less than 60, it is automatically reloaded with 60.
Writing 0 to the BMS Timer will disable this feature.
Writing non 0 values to this the BMS Timer enables this feature.
Default is ON
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Page 41
Input Variables (Read Only)
Address NameRaw Data Type Scale DescriptionValid Values/Range
30001 Outside Temperature16 bit unsigned1.0
30002 Space Temperature16 bit unsigned1.0
30003 Strat Temperature16 bit unsigned1.0
30004 Delta Pressure16 bit unsigned 0.01 Pressure across the unit0 – 5 ‘WC
30005 Ignition State8 bit unsigned–Current Ignition State of the unit
30006 Operating Mode8 bit unsigned–The current operating mode of the unit.
30007 Operating Input8 bit unsigned1.0 The current operating input of the unit. 33% - 100%
30008 Prop Fan8 bit unsigned–Unit Prop Fan Status
30009 Thermostat Inputs Status 8 bit unsigned–These bits indicate the state of the thermostat inputs.
30010 Indoor Air Reset8 bit unsigned1.0 Current Indoor Air Rest Limit33% – 100%
30011 Fault Code8 bit unsigned–Indicates the highest priority Fault set on the unit.See the Fault Code Table.
30012 Inducer Blower RPM16 bit unsigned1.0 Current RPMs of the inducer blower0 – 6500
30013 Combustion Blower RPM 16 bit unsigned1.0 Current RPMs of the Combustion blower0 – 11300
Outside air temperature
* optional
Space temperature
* optional
Stratication temperature
* optional
-40 – 250°F
-52°F if not installed
-40 – 250°F
-52°F if not installed
-40 – 250°F
-52°F if not installed
0 = Standby
1 = Sequence Start
2 = Pre Purge
3 = Ignition Trial
4 = Running
5 = Post Purge
6 = Lockout
0 = Standby
1 = Fan Only (G)
2 = Heating 1 (W1)
3 = Heating 2 (W2)
0 = Prop Fan Off
1 = Prop Fan On
See the Thermostat
Inputs Flags table.
Status Flags – Thermostat Input Flags
BitDescriptionValid Values/Range
0Thermostat G (Local or Global)0 = No Signal, 1 = Signal Present
1Thermostat W1 (Local or Global)0 = No Signal, 1 = Signal Present
2Thermostat W2 (Local or Global)0 = No Signal, 1 = Signal Present
3Thermostat AUX (Local or Global)0 = No Signal, 1 = Signal Present
Note: Supply Voltages [SV] 2-7 include eld mounted step down transformer.
12 - Motor Type [MT]
1 - Open Drip Proof
13 - Blower Motor Sizes [MS]
0 - Not applicable
14 - Design Level [DL]
A - First design level
15+ - Accessories [AS]
0 - Not applicable
† FIELD INSTALLED (AS-____ )
† All Field Installed Accessories are to be entered as a separate line item using the catalog
number which utilizes “AS” as a pre x. i.e: G3 becomes AS-G3.
A7 - High Pressure Regulator
A7-1/2-1 - Regulator for PSI range 0.5-10
A7-3/2-1 - Regulator for PSI range 10-20
A7-5/16-1 - Regulator for PSI range 20-35
Customer ____________________________________ Job Name & Number _________________________
PRE-INSPECTION INFORMATION
With power and gas off.
Type of Equip: Unit Heater
Serial Number _________________________ Model Number __________________________
Name Plate Voltage: _____________ Name Plate Amperage: _____________
Type of Gas: Natural LP Tank Capacity _______ lbs. Rating: _ _____ BTU @ ____ °F
_______ kg _ _____ kw @ ____ °C
❐ Are all panels, doors, vent caps in place?
❐ Has the unit suffered any external damage? Damage ______________________________
❐ Does the gas piping and electric wiring appear to be installed in a professional manner?
❐ Has the gas and electric been inspected by the local authority having jurisdiction?
❐ Is the gas supply properly sized for the equipment?
❐ Were the installation instructions followed when the equipment was installed?
❐ Have all eld installed controls been installed?
❐ Do you understand all the controls on this equipment? If not, contact your wholesaler or rep.
(DO NOT START this equipment unless you fully understand the controls.)
GENERAL
With power and gas off.
❐Make certain all packing has been removed.
❐ Tighten all electrical terminals and connections.
❐ Check all fans & blowers for free movement.
❐ Check all controls for proper settings.
❐ Inlet gas pressure. ____ in. W.C. or ____ kPa
❐ Burner ignition.
❐ Cycle and check all other controls not listed.
❐ Entering air temp. _____ °F or ____ °C
GAS HEATING
With power and gas on.
❐ Discharge air temp. (High Fire) ____ °F. or ____ °C
FAN
With power and gas off.
❐Check voltage L1___ L2___ L3___
❐ Check rotation of main fan.
❐ Check motor amps L1___ L2(N)___