EngA XE-FP-PV series User manual

A
INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
FOR
XE, (D,H) FP - PV SERIES
UNITMODELNO. ______________________________
UNITSERIALNO. ______________________________
SERVICEDBY: __________________________________
TEL.NO: ______________________________________
SALESOFFICESACROSSCANADAANDUSA
RETAININSTRUCTIONSWITHUNITANDMAINTAININALEGIBLECONDITION
PLEASEGIVE MODELNO.& SERIALNO.WHEN CONTACTING
FACTORYFORINFORMATIONAND/OR PARTS FORM# PV-8.99
INDOOR POWER VENTED
INDIRECT GAS - FIRED HEATING UNIT
L
I
S
T
E
D
R
C
CANADIANHEADOFFICE
ANDFACTORY
1401-HASTINGSCRES.S.E.
CALGARY,ALBERTA
T2G-4C8
CANADIAN
FACTORY
6130-97STREET
EDMONTON,ALBERTA
T6E3J4
CANADIAN
EASTERNFACTORY
1175-TWINNEYDRIVE
NEWMARKET,ONTARIO
L3Y-5V7
USAHEADOFFICE
ANDFACTORY
32050W. 83rdST.
DESOTO,KANSAS
66018
US

Page 1
INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
INDEX
PAGE
INTRODUCTION............................................................................................................. 2
WARRANTY ................................................................................................................... 2
RECEIVING THE UNIT ................................................................................................... 3
INSTALLATION
CODES...........................................................................................................................3
CLEARANCES................................................................................................................ 3
LOCATION...................................................................................................................... 4
SUSPENSION MOUNTING............................................................................................. 4
ASSEMBLY OF TWO - PIECE UNITS............................................................................. 4
COOLING COILS............................................................................................................ 5
DRAIN TRAPS................................................................................................................ 5
VENTING........................................................................................................................ 6
A) SIDE WALL INDIVIDUAL VENT............................................................................ 6
B) VERTICAL INDIVIDUAL VENT.............................................................................. 8
C) OPTIONAL VERTICAL VENT TERMINAL............................................................. 9
INSULATION OF SINGLE WALL VENT PIPE.................................................................. 9
COMBUSTION AIR....................................................................................................... 10
GAS INSTALLATION .................................................................................................... 10
DUCTWORK................................................................................................................. 11
ELECTRICAL INSTALLATION ...................................................................................... 11
COMBUSTION AIR PROVING SWITCH........................................................................ 11
START-UP CHECK LIST............................................................................................... 11
OPERATION
OPERATIONAL CHECK ............................................................................................... 12
OPERATING INSTRUCTIONS...................................................................................... 13
MAINTENANCE
SET SCREWS.............................................................................................................. 14
LUBRICATION.............................................................................................................. 14
PULLEYS AND BELTS ................................................................................................. 14
FILTERS....................................................................................................................... 14
CONTROLS.................................................................................................................. 14
FURNACE INSPECTION AND CLEANING.................................................................... 14
SUMMER OPERATION ................................................................................................ 15

April 23, 1999Page 2
INTRODUCTION
The Engineered Air XE, (D,H)FP-PV Series units are high quality products designed and
manufactured to provide many years of trouble-free service. We recommend that this manual be
read thoroughly to ensure ease of installation, efficient operation and proper maintenance of this
equipment. The submittal record is considered to be part of the Installation, Operation and
Maintenance Manual.
WARRANTY
ENGINEERED AIR will furnish without charge, F.O.B. factory, freight collect, replacement parts for,
or repairs to products covered herein which prove defective in material or workmanship under normal
and proper use within one year from the date of delivery, provided the customer gives ENGINEERED
AIR written notice of such defects and provided that inspection by ENGINEERED AIR establishes
the validity of the claim and all pertinent invoices have been paid in full.
The correction of such defects or replacement will be made only when the complete products or part
claimed defective are returned to ENGINEERED AIR, transportation charges prepaid, if such return
is requested by ENGINEERED AIR.
Repairs or replacements as provided by the foregoing paragraph shall constitute fulfilment of all
ENGINEERED AIR
= sobligations with respect to this warranty. The refrigerant charge is not included
in any part of this warranty. ENGINEERED AIR shall not be liable to any damage to person or
property, or loss of revenue, or expense incurred, irrespective of cause. This warranty does not
apply to any products or parts thereof that have been subject to accident, misuse or unauthorized
alterations, or where ENGINEERED AIR
= sinstallation and service requirements have not been met.
The foregoing warranty is in lieu of all other warranties, expressed or implied.
ENGINEERED AIR Warranty is void if:
1. The start- up & operation of the unit is not done in accordance with this manual.
2. The unit is operated in atmosphere containing flammable vapours, chlorinated or halogenated
hydrocarbons, or other corrosive substances.
3. The unit is allowed to operate during building construction period.
FOR YOUR SAFETY
The use and storage of gasoline or
other flammable vapours 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 flame.
4. Immediately call your gas supplier
Warning: Improper installation, adjustment, alteration, service or maintenance can
cause property damage, injury or death. Read the installation, operating and
maintenance instructions thoroughly before installing or servicing this equipment.

April 23, 1999
Page 3
RECEIVING THE UNIT
Engineered Air units are usually pre-wired and assembled where possible. On receipt of unit, check
electrical characteristics (see name plate) to make sure the unit voltage is compatible with that
available for the unit. All separate parts are listed on the shipping order form. Carefully check
shipping slip for all components and for damage to components before signing the freight bill. This
unit was pretested at the factory immediately prior to shipping and was in good operating condition
at that time.
INSTALLATION
CODES
In Canada
The installation of this unit must be made in accordance with:
(a) The installation code for gas burning appliances and equipment, C.G.A. Std. CANI-B149.1 and
.2, Provincial and Local Codes on units burning gas.
(b) The Canadian Electrical Code, Part 1 - C.S.A. Standard C22.1, Provincial and Local Codes.
In USA
(a) All gas piping must be installed in accordance with the National Fuel Gas Code ANSI/Z223.1 -
latest edition. The local authority having jurisdiction should be consulted for local codes and
requirements.
(b) All power supply and control wiring to this unit must be installed in accordance with the latest
edition of the National Electrical Code (ANSI/NFPA 70).
CLEARANCES TO COMBUSTIBLES IN INCHES (MM)
For Safety and Service, the following minimum clearances on the units shall be observed:
Heaters must be installed to meet at least the minimum clearances shown on the rating plate. The
rating plate is located in the burner compartment. Be sure to allow enough clearance in front of the
unit for removing the burners and above for removing fan motors and blades.
MODEL
TYPE TOP FRONT FLUE
LEFT &
RIGHT
SIDE
*BURNER
SIDE BACK FLOOR
XE - 1"
(25) 6" (152) 6" (152) 0 6" (152) 0 C#
(D,H)FP
SUS 6"
(152) 6" (152) 6" (152) 18" (457) 6" (152) 12" (305) **12 (305)
*- Service Clearance for Burner and Blower Access, 24" (610).
**- Suspended type heating units are suitable for use in:

April 23, 1999
Page 4
a) Air plane hangers when acceptable to the enforcing authority.
b) Public garages when installed in accordance with the current CANI-B149 or State Installation
Codes.
# Counterflow Units on combustible floor require special base Part# CB(2,3,4,5,7,8, & 10).
LOCATION
These Power Vented (D,H)FP - PV Unit Heaters are designed to be installed in the space being
heated, and in locations where flammable gases or vapours are not present. THESE HEATERS
MUST NOT BE INSTALLED IN REPAIR GARAGES OR OTHER SUCH LOCATIONS WHERE
GASOLINE OR ANY KIND OF FLAMMABLE VAPOURS ARE PRESENT. Choose a location where
the Heater can be conveniently suspended from the ceiling or wall with pipe hangers and adequately
clears all vehicular traffic and storage shelves. The Heater should be mounted so that obstructions
which deflect airflow are kept to a minimum. Heaters should blow towards or along exposed wall
surfaces and are best located as close to the working area as possible.
SUSPENSION MOUNTING
The (D,H)FP - PV Unit Heaters are provided with threaded pipe hangers to simplify hanging. Be sure
the supporting members have adequate strength and stability to support the weight of the Heating
Unit shown on the specification page. Connect these hangers to suspended pipes with unions and
couplings. Spacing between pipes should match the hanger spacing. Pipes should be sized to match
the hanger size and long enough to allow for clearances.
ASSEMBLY OF TWO - PIECE UNITS
This procedure covers the required field assembly of XE/EM units.
1. HB (HIGH BOY) UNITS
a) Place heat section on top of fan section so the heat section is 1/2" (13) behind the
fan section.
b) Carefully slide the heat section forward until the back and sides of the heat and fan
section are flush. This will lock the two pieces together at the back as the locking clip
engages. Do not damage foam tape which acts as air seal between sections.
c) Remove fan section door, then lift the front of the heat section and block the front
open about 4" (102).
d) Feed the motor wires through between the sections and allow the wire to hang in the
fan compartment.
e) Lower the heat section back onto the fan section. Check alignment of pieces then
drive sheet metal screws up from the fan section into the heat section. Holes are
provided in fan section at front sides for locating screws. Make sure the motor wires
are not pinched between sections - but feed smoothly from one to other.
f) The unit is now one piece locked together at the rear by a clip and at front by two
sheet metal screws.
g) Follow wiring diagram on the unit to connect motor wires to motor.
h) Inspect and test electrical components and motor operation.
2. CF (COUNTER FLOW) UNITS
a) Place fan section on top of heat section so the fan section is 1/2" (13) forward of heat
section.
b) Carefully slide the fan section back until the back and sides of the heat fan section
are flush. This will lock the two pieces together at the back as the locking clip
engages. Do not damage foam tape which acts as air seal between sections.
c) Remove outer fan door, vent pipe, shipping cardboard and inner fan door. Drive
sheet metal screws from fan section into heat section. Holes are provided in the
front vestibule at sides for locating two sheet metal screws.

April 23, 1999
Page 5
d) The unit is now one piece locked together at back by clip and at front by two sheet
metal screws.
e) Motor wires and upper limit control wires are clipped at top of heat section. Feed
both these wire pairs into the fan compartment, through the wire way hole provided.
Wires should be neatlyclipped in place and taut so theywill not contact the hot draft
hood parts.
f) Connect motor wires to motor and upper limit control to limit as shown on wiring
diagram.
g) Install inner fan door.
h) Connect vent pipe between heat section and top collar of fan section. The vent
connector piece should be well tightened and located at the top of the fan section.
i) Inspect and test electrical components and motor operation.
3.LB (LOW BOY) UNITS
a) Place fan section at rear of heat section with fan directed into the heat section
opening.
b) Screw the two sections together with four sheet metal screws driven from inside the
fan compartment into the heat section. Holes at top and bottom sides are provided
to locate the screws.
c) The unit is now one piece locked together by four sheet metal screws.
d) Pull wires from the motor wire way tube into the fan compartment and connect these
wires to motor according to wiring diagram.
e) Inspect and test electrical components and motor operation.
COOLING COILS
Units with Cooling Coils installed on the upstream side of the heating unit must be equipped with a
stainless steel heat exchanger to avoid corrosion of the heating element caused by condensation.
DRAIN TRAPS
All unit drain connections require a separate drain trap be installed on site. If a drain connection has
a smaller drain pipe inside, connect to the outer pipe only. Insure that the trap is of adequate depth
to operate against a negative static greater than that which the system will encounter with dirty
filters.
Multiple drain traps can be connected together into runs. Runs must be properly sized and sloped
to keep unit drained.
Size drain trap with the following minimum requirements for 1 1/2" (38mm) diameter connection
on:
a)Units with Draw Thru Drain Pans
H1 = Negative Static x 1.5 + 3.5"
H2 = Negative Static x 0.75 + 2.5"
b)Units with Blow Thru Drain Pans
H2 = Maximum Positive Pressure x 1.5"
H1 = H2 + 0.5"

April 23, 1999
Page 6
.VENTING
There are 3 arrangements by which this appliance may be vented:
A. SIDEWALL INDIVIDUAL VENT
B. VERTICAL INDIVIDUAL VENT
C. OPTIONAL VERTICAL VENT
Details of each method follow. Note carefully the regulatory requirements for the one you
choose.
FOR ALL METHODS ENSURE COMPLIANCE WITH THE FOLLOWING - FAILURE TO DO SO
MAY RESULT IN A HAZARDOUS CONDITION AND WILL VOID THE WARRANTY.
A) The vent system should be checked once every year by qualified service personnel.
B) This Heater shall not be connected to a venting system serving any other gas, liquid,
or solid fuel fired appliance or fireplace.
C) The venting system shall be sized so that the vent area is not less than that of flue
outlet of the Heater.
D) Pipes for flue gases must be sized as per minimum vent size table (page 3 - figure
1). On smaller units where the flue discharge opening is smaller, the transition to the
larger size pipe must be made at the Heater and not at the vent terminal.
E) The pipes for flue exhaust must be of 24 GA. galvanized steel or a material with at
least equal strength and corrosion resistance.
F) Keep the vent connector pipe as short and direct as practical. The maximum
equivalent length of the vent pipe is not to exceed 25'. The minimum length of vent
pipe is 6'. One 6" diameter 90 degree elbow is equivalent to four feet of straight pipe.
Be sure to consider all elbows when planning the vent.
G) All connections between the Heater and the vent terminal must be secured with two
corrosion resistant sheet metal screws, rivets, or solder.
H) All joints and seams between the Heater and the vent terminal must be sealed. Tape
or solder may be used to seal the flue pipe providing the tape may be used at 550oF.
WE RECOMMEND USING 3M TYPE 433 OR 363 ALUMINUM TAPE. ALL FLUE
PIPING MUST BE CHECKED FOR GAS TIGHTNESS FOLLOWING
INSTALLATION.
I) In all cases maintain a minimum of 6" clearance between the vent connector pipe and
any adjacent combustible construction.
J) The exhaust cap to be used is the exhaust cap supplied with the unit. For information
on alternate exhaust caps, contact your Engineered Air representative. NOTE: Only
CGA approved Engineered Air supplied exhaust caps are acceptable as alternates.
K). If the vent pipe passes through a combustible wall or roof, a ventilated metal thimble
must be used to provide a minimum 2" clearance to the combustible material.
NOTICE
SPECIAL VENTING SYSTEM REQUIRED
RATED FLUE GAS TEMPERATURE 450oF (232oC)
RATED VENT PRESSURE NON POSITIVE
A. SIDE WALL INDIVIDUAL VENT
INSTRUCTIONS: Figure 1: Minimum Vent Sizing Table for Side Wall Venting
Series Model Minimum Vent Size
XE (DH) - FP - PV 65 - 255 4"
XE (DH) - FP -PV 320 6"

April 23, 1999
Page 7
VENT LOCATION
The vent pipe shall be terminated through an outside wall according to the following rules:
A) The vent terminal shall NOT be located:
i) Less than 6 feet (1.8m) from a combustion air inlet of another appliance or
mechanical air supply inlet to a building.
ii) Less that 3 feet (1m) from any other building opening.
iii) Directly above a gas, water or electrical utility meter or service regulator, within 3 feet
(1m) horizontally of the vertical centre line of the regulator.
iv) Over a walkway unless located at least 7 feet (2.1m) above grade.
v) Less than 12 inches (300mm) above grade. (Recommend 6 inches (150mm) above
Maximum expected snow depth.)
See figure 2 for minimum clearances to building etc.
FIGURE 2
b) Allow 1/4" per foot upward slope.
INSTALLING THE VENT
1. Prepare a hole vent size in figure 1 + 4" in the wall for the passage of the vent thimble. (If
the thimble is required for clearance to combustibles).
2. Prepare the lengths of flue pipe to be used. Be sure to account for the position of the
mounting brackets and wall thickness. The flue pipe must extend beyond the outside wall a
minimum of 16".
3. Insert the thimble through the wall and secure in place using a mounting bracket to a suitable
support. The thimble must be caulked or flashed to the outside wall.
4. Install the flue pipe through the thimble ensuring that the minimum clearance of 16" to the
outside wall is observed. Secure the flue pipe to the thimble with corrosion resistant screws
and high temperature sealant. Attach the exhaust cap to the end of the flue pipe and secure
with 2 corrosion resistant sheet metal screws and high temperature sealant.
5. Install the flue pipe between the vent terminal and the heater. All pipe joints must be sealed
with high temperature tape and silicone sealant, and secured with corrosion resistant sheet
metal screws. High temperature tape shall be wrapped two full turns around each joint. All
piping must be supported every 3 feet to prevent sagging.

April 23, 1999
Page 8
B. VERTICAL INDIVIDUAL VENT
VENT LOCATION
The vent pipe shall be terminated through a roof using a vent terminal according to the following
rules:
a) The vent terminal shall NOT be located:
i) less than 6 feet (1.8m) from a combustion air inlet of another appliance or mechanical air
supply inlet to a building.
ii) less than 3 feet (1m) from any other building opening.
iii) above a meter/regulator assembly within 3 feet (1m) horizontally of the vertical centre line
of the regulator.
iv) within 6 feet (1.8) of any gas service regulator vent outlet.
See Figure 3 for minimum clearances.
Size the vent pipe from an approved vent table using Fan Max Column.
INSTALLING THE VENT
FIGURE 3
1. Prepare hole in the roof for the passage of the vent thimble. (If the thimble is required for
clearance to combustibles).
2. Prepare the lengths of flue pipe to be used. Be sure to account for the position of the
mounting brackets, roof thickness, plus the expected snow ridge/or parapet clearance
required.

April 23, 1999
Page 9
IMPORTANT:THE EXHAUST CAP MUST BE A MINIMUM OF 24" OR 6" ABOVE THE
EXPECTED SNOW DEPTH ON THE ROOF, WHICH EVER IS GREATER, ONCE
THE INSTALLATION IS COMPLETE. VERTICAL PIPE EXTENSIONS OVER
12" MUST BE INSULATED BY A SUITABLE METHOD.
3. Insert the thimble through the roof and secure in place using the mounting bracket or a
suitable support.
4. Install the flue pipe through the thimble ensuring that the minimum clearance accounting for
snow depth is observed. Secure the flue pipe to the inner pipe of the thimble with corrosion
resistant screws and high temperature sealant. The joint between the thimble and flue pipe
must be sealed, and the flue pipe must be flashed to the roof. Attach the exhaust cap to the
end of the flue pipe and secure with 2 corrosion resistant screws and high temperature
sealant.
5. Install flue pipe between the vent terminal and the Heater. All pipe joints must be sealed with
high temperature tape and silicone sealant, and secured with corrosion resistant sheet metal
screws. High temperature tape shall be wrapped two full turns around each joint. Ensure the
flue pipe is adequately supported for vertical venting as per CAN1-B149 codes latest
addition.
C. OPTIONAL VERTICAL VENT TERMINAL
Your power vented Heater may be vented using an existing Type B vent terminal provided the
following conditions are met.
1. Ensure the installation meets local venting codes and CAN1-B149 codes latest edition.
2. Size vent pipe from an approved vent table using Fan Max Column. (Tables may be found
in CAN1-B149 codes).
3. Ensure that the only large diameter vent pipe is the vent terminal itself, i.e. the expansion
must take place at the vent terminal.
4. Ensure the vent terminal is in good condition, clean, and gas tight. If there is damage or if
the vent terminal is corroded, a vent terminal as described early is recommended.
5. Install flue pipe between the existing vent terminal and the Heater. All pipe joints must be
sealed with high temperature tape and silicone sealant and secured with corrosion resistant
sheet metal screws. WE RECOMMEND USING 3M TYPE 433 OR 363 ALUMINUM TAPE.
High temperature tape shall be wrapped two full turns around each joint. Ensure the flue
pipe is adequately supported for vertical venting as per CAN1-B149 codes, latest addition.
RECOMMENDED METHOD OF INSULATING THE SINGLE WALL VENT PIPE (A 6" clearance
to combustible material must be maintained).
1. It is required that any vent connector pipe which runs through unheated space be insulated
with 1" fibreglass insulation as described in FIGURE # 4 and FIGURE # 5. In heated space it
is acceptable to omit insulation.
2. After the vent pipe has been properly sealed and properly supported, the one piece pipe
insulation may be installed.
3. First insulate all the straight sections of vent pipe but do not fasten.
4. Vent pipe elbows may be insulated by miter cutting a straight section of one piece pipe
insulation.
5. Once the entire length of vent pipe has been enveloped, peel off the release paper and seal
all joints. Seal by pressure with hands working from the centre out. (See figure 4).
6. Remove the release paper from the butt strips and wrap snugly around butt joints. (See
figure 5).

April 23, 1999
Page 10
COMBUSTION AIR
All fuel burning equipment requires an adequate supply of air for combustion. A sufficient
quantity of air must enter the heated space to replace that exhausted by the Heater.
Modern buildings greatly reduce the amount of air entering the heated space through improved
construction techniques. As well exhaust fans may create a negative pressure in the heated
space. Follow CAN1-B149 Code, latest addition, and any local codes to provide enough air for
combustion, ventilation and proper venting. Clearances must be maintained at all times from the
louvred front panel openings.
GAS INSTALLATION
Installation must be made in accordance with the requirements of the authorities having
jurisdiction.
1) Carefully check the unit name plate for the fuel type, supply pressure, input rating and
temperature rise.
2) Gas supply pressure higher than the unit name plate requires an additional field supplied gas
regulator. The standard unit name plate is 7" WC (1.75 kPa).

April 23, 1999
Page 11
3) Gas lines should not be run in a manner which will interfere with unit access. The gas line
connection at the heater shall have an approved drip leg with screwed cap.
4) The gas piping must be sized to allow for a maximum of 0.3" WC (75Pa) pressure drop from
meter to unit.
DUCTWORK
No Ductwork, Plenums, or Turning Vanes should be attached to Low Static (D,H)FP - PV Heater
Air Outlets.
ELECTRICAL INSTALLATION
All wiring shall be installed according to the requirements of the authorities having jurisdiction.
Field wiring, internal wiring diagrams and unit operating functions are included in the control
cabinet of the unit. The power requirements are indicated on the unit name plate. Where field
wiring of the control circuit is required, take care to size the field wiring for a maximum 10%
voltage drop. The VA rating of the transformer can be assumed to be the maximum load.
Standard Power of 115 volts, 1
i , 60Hz power supply is required. If heater is wired for other than
this power, look for special markings. DO NOT install any devices in a manner that interfere with
access to the unit approval label or door opening.
Replacement wiring must be equivalent to original wire. See field wiring diagram for requirements
for shielded or twisted pair wire for solid state devices.
COMBUSTION AIR PROVING SWITCH
The combustion air proving switch is a single pole double throw switch which is activated by
differential pressures in the venter blower. The switch ensures that proper combustion air flow is
available before the burner fires. The switch is pre-set at the factory and should not require
adjustment. If a blockage occurs in the flue, the switch will act to shut off the burner. If the unit is
running and there is a call for heat, but the burner does not fire, a problem may exist in the
venting system. Call a qualified serviceman.
WARNING: SAFE OPERATION OF THIS UNIT REQUIRES PROPER FLOW OF
COMBUSTION AIR.
NEVER bypass the combustion air proving switch or attempt to operate the Heater without
the venter motor running. A hazardous condition could result.
START-UP CHECK LIST
The start-up and operation must be done in accordance with safe practices. State or Provincial
regulations require that service mechanics who work on combustion equipment must be
licensed. The unit should NOT be started or serviced by unqualified personnel.
1) Ensure that all shipping materials have been removed.
2) Set all electrical switches and main unit disconnect switch in A OFF @ position.
3) Close all unit manual valves and field piping valves.
4) Remove tie-down bolts on blower vibration isolators (if supplied).
5) Check all bearings, drive and blower set screws for tightness.
6) Check drive alignment and belt tension. Refer to Maintenance, Page 14.

April 23, 1999
Page 12
7) Purge all the air from the gas lines. Check all connections for leaks and fix any leakage.
Ensure that the inlet pressure agrees with the name plate.
8) Inspect all electrical wiring, both field and factory installed, for loose connections.
9) Turn unit disconnect switch
A ON @ (control switch is still off) and check the supply voltage.
Voltage must be within 10% of name plate rating. If not, consult the power company and
have the voltage condition corrected before continuing unit start-up.
10) Check setting of fan - limit control(s). Adjust high limit to value indicated below unless
wiring diagram shows a different value.
High Limit 180
E F (82 E C)
Fan Switch
A ON @ , 125 E F (52 E C)
Fan Switch
A OFF @ , 90 E F (32 E C)
Set all temperature controls to the temperature setting indicated on the wiring diagram.
11) Set thermostat or controller in the
A off @ position and turn unit control switch A on @ .
12) Check all fan motors for correct rotation. If incorrect, reverse rotation.
13) Check the amperage draw of each motor. Refer to name plate for full load amps.
14) Re-check voltage at unit disconnect switch with unit running. If the power is not within 10%
of name plate, shut unit down and consult power company. Voltage should be within 2% on
all phase to phase readings when compared to each other. A 2% voltage difference could
cause as much as a 10% current imbalance.
OPERATION
CALL A QUALIFIED SERVICEMAN FOR SERVICE
OPERATIONAL CHECK
1. PILOT ADJUSTMENT
a) FOR UNITS WITH INTERMITTENT PILOT IGNITION:
Turn the burners on the following the above operating instructions and check to see if the
pilot flame is stable and blue in colour. The pilot should be large enough to completely
envelope the flame sensor. Adjust the pilot, if necessary, by turning the pilot adjustment
screw on the gas valve.
b) FOR ALL UNITS WITH DIRECT SPARK IGNITION:
Turn the burners on following the above operating instructions and check to make sure the
ignition is smooth with no delays. The spark igniter gap must be no less than 1/8" nor no
more than 3/16". Make sure the end of the flame sensor on the right burner head is in the
main burner flame approximately 1/2". Turn the unit off, allow to cool and adjust if necessary.
2. BTU INPUT: All natural gas units are equipped with a Honeywell VR8200 or equivalent
valve. The outlet pressure is factory set to 3.5" WC, (0.87Kpa). Should adjustment be
required, the outlet pressure of the valve can be varied according to the following procedure.
Refer also to valve manufacturer's instructions for additional details. This procedure applies
only to natural gas fired units. Install and adjust units in accordance with local or provincial
gas codes.
(1) Turn knob on gas valve to "pilot" or "off".

April 23, 1999
Page 13
(2) Remove pressure tap plug in valve or pressure tap plug in manifold and install pressure
tap fitting.
(3) Connect pressure gauge to pressure tap fitting. Preferred gauge is a U tube manometer.
(4) Turn valve to "on" and let burners come to full fire (approximately 15 seconds from initial
opening of valve).
(5) Remove regulator cover screw and adjust manifold pressure by turning adjusting screw
clockwise to increase pressure or counterclockwise to decrease pressure. (CAUTION:
Adjustment is sensitive. Turn screw very slowly.)
(6) Set manifold pressure to the rating plate value.
i.e. 4.0"WG(1kPa) for 0 - 2000 ft. (610m) rating
3.5"WG(0.89kPa) for 0 - 4500 ft. (1372m) rating
Allowable tolerance + .05"WG(+ 12.5 Pa)
(7) Check the gas input to the unit with the gas meter.
(8) When the pressure and input are set, turn knob on gas valve to "pilot" or "off". Remove
pressure tap fittings, install pressure tap plugs and install regulator cover screw.
(9) Turn knob on control valve back to on position.
3. AIR SHUTTER ADJUSTMENT: - See instruction label in burner compartment.
4. TEMPERATURE RISE: Adjust the fan pulley to get the specified temperature rise through
the unit (70oF[21
E C] to 100oF[38 E C] allowable). Thermometers may be used at the return
and supply air outlets to determine temperature rise. Avoid having thermometers pick up
radiant heat and giving false readings.
5. THERMOSTAT: Complete thermostat instructions are provided in the thermostat box.
These should be adhered to, with the following exception: Thermostat heat anticipator
should be set slightly higher (+0.16) than the control circuit current draw. Set heat anticipator
to 1.0 on units with X-TRAC or Maxitrol controls.
6. VENT SAFETY SWITCH: This unit is equipped with a vent safety limit switch. The sensing
element of this switch is located in the relief opening of the draft hood. The switch opens to
shut down the main burners in the event of a blockage in the venting system. If a shut down
occurs, refer to the information sticker adjacent to the switch.
OPERATING INSTRUCTIONS
1. Lighting, shut off and shut down instructions are provided on the rating plate located in the
burner compartment.

April 23, 1999
Page 14
MAINTENANCE
In order to provide a maintenance history, we recommend that the owner have a maintenance
file on each unit. The following maintenance instructions are to be carried out each spring and
fall or as otherwise indicated by a qualified serviceman.
1. SET SCREWS
Check set screws on blower wheel, blower bearings, blower and motor pulleys for looseness
on the shaft. Tighten where required. Proper torque values are available from the bearing
manufacturer. IT IS IMPORTANT TO PERFORM THIS CHECK BEFORE INITIAL START-
UP, AFTER A RUN-IN PERIOD OF 2 TO 4 WEEKS AND THEN ON A REGULAR BASIS
OF 4 TO 6 MONTHS.
PV shaft diameter = 3/4" (19mm): Set Screw Torque at 35 in.lb.. (4 NM).
2. FAN LUBRICATION: No lubrication of the fan bearings is necessary. Both ball and sleeve
fan bearings are permanently lubricated for their life.
3. MOTOR LUBRICATION: Generally motor should be lubricated with a few drops of non-
detergent SAE NO. 20 or SAE 30 oil once each year. DO NOT over-oil or use light-weight
household oil.
4. PULLEYS AND BELTS: Periodically check that the fan pulley and motor pulley are tight on
their shafts. The fan pulley and motor pulley should be aligned, and the belt tightened only
enough to prevent slipping. Replace a cracked or broken belt.
5. FILTERS - DISPOSABLE TYPE: The air filter should be removed and cleaned about three
times during the heating season. If unit is equipped with air-conditioning, never operate
without a filter. Always install the filter with air-flow arrow in the proper direction.
6. FILTERS - PERMANENT TYPE: If permanent, washable filters are installed, remove and
vacuum or wash them to remove dust accumulation. When the filter becomes worn out from
repeated cleanings replace it with a new filter of the same size and type. Reuse the metal
filter clips on the new filter.
7. CONTROLS:
A. Clean and recalibrate all controls.
B. Check controls for proper operation.
C. Repair or replace any controls found faulty.
D. Check all damper settings.
E. Replace blown fuses with equivalent size fuse. Failure to do so may result in damage to
the unit.
8. FURNACE INSPECTIONS and CLEANING: Furnaces should be inspected once every four
months during the heating season where the equipment is operating under normal
conditions. If the furnace is located where unusual amounts of dust or soot or other
impurities are contained in the air, more frequent inspection is recommended.

April 23, 1999
Page 15
A. The induced draft fan wheel must be cleaned as soon as there is any dust on it.
B. Follow the OPERATIONAL check as detailed on pages 12 & 13.
C. It is good maintenance practice to thoroughly vacuum the fan compartment, fan and
burner compartment at least once per year, to remove accumulated dust. The fan can be
removed for cleaning.
9. SUMMER OPERATION: A "manual" continuous fan switch is provided on the fan control
located in the burner compartment. Some summer cooling can be obtained by turning on
the fan to provide air circulation. Easiest on-off control is by using the disconnect switch or
fuse block switch to turn the fan "on" and "off" with the manual fan switch engaged.