International comfort products R9MSB0601716A, R9MSB0801716A, R9MSB1002122A, R9MSB1202422A Service And Technical Support Manual
SERVICE AND TECHNICAL
SUPPORT MANUAL
Single Stage, PSC Blower Motor
35” Tall, High Efficiency Condensing Gas Furnace
R9MSB
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Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER − Immediate hazards which will result in
severe personal injury or death.
WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
Signal Words in Manuals
The signal word WARNING is used throughout
this manual in the following manner:
!
WARNING
The signal word CAUTION is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
Safety−alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
START-UP, ADJUSTMENT, AND SAFETY CHECK 3.....
GENERAL 3........................................
PRIME CONDENSATE TRAP WITH WATER 3..........
PURGE GAS LINES 3...............................
ADJUSTMENTS 3..................................
CHECK INLET GAS PRESSURE 4....................
ADJUST MANIFOLD PRESSURE 4...................
ADJUST TEMPERATURE RISE 6.....................
ADJUST BLOWER OFF DELAY) 6....................
BLOWER OFF DELAY JUMPER POSITIONS 6.........
ADJUST COOLING AIRFLOW 6......................
ADJUST THERMOSTAT HEAT ANTICIPATOR 6........
CHECK SAFETY CONTROLS 6......................
CHECKLIST 7......................................
ALTITUDE DERATE MULTIPLIER . 7..................
GAS RATE) 8......................................
ORIFICE SIZE AND MANIFOLD PRESSURE 10.........
SERVICE AND MAINTENANCE PROCEDURES 11......
PRESSURE SWITCHES 12...........................
CLEANING HEAT EXCHANGERS 18...................
SEQUENCE OF OPERATION 22......................
PARTS REPLACEMENT INFORMATION GUIDE 26......
MODELS
R9MSB0601716A
R9MSB0801716A
R9MSB1002122A
R9MSB1202422A
Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
Printed in U.S.A. 440 04 6000 00 8/05/13
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock,
or other conditions which may cause death, personal injury, or
property damage. Consult a qualified installer, service agency,
or your distributor or branch for information or assistance. The
qualified installer or agency must use factory−authorized kits or
accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes,
the current editions of the National Fuel Gas Code (NFCG)
NFPA 54/ANSI Z223.1, and the National Electrical Code (NEC)
NFPA 70.
In Canada refer to the current editions of the National standards
of Canada CAN/CSA−B149.1 and .2 Natural Gas and Propane
Installation Codes, and Canadian Electrical Code CSA C22.1.
Recognize safety information. This is the safety−alert symbol
. When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand these signal words; DANGER, WARNING, and
CAUTION. These words are used with the safety−alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability, or operation.
!
PERSONAL INJURY, AND/OR PROPERTY DAMAGE
HAZARD
Failure to carefully read and follow this warning could
result in equipment malfunction, property damage,
personal injury and/or death.
Installation or repairs made by unqualified persons could
result in equipment malfunction, property damage,
personal injury and/or death.
The information contained in this manual is intended for
use by a qualified service technician familiar with safety
procedures and equipped with proper tools and test
instruments.
Installation must conform with local building codes and
with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI
Z223.1, and National standards of Canada
CAN/CSA−B149.1 and .2 Natural Gas and Propane
Installation Codes.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one power
switch.
!
WARNING
WARNING
WARNING
CARBON MONOXIDE POISONING AND FIRE
HAZARD
Failure to follow safety warnings could result in personal
injury, death, and/or property damage.
This furnace is not designed for use in mobile homes,
trailers or recreational vehicles.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in damage
personal injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
furnaces.
2
Specifications are subject to change without notice.
440 04 6000 00
START−UP, ADJUSTMENT, AND SAFETY
CHECK
General
1. Furnace must have a 115-v power supply properly
connected and grounded.
NOTE: Proper polarity must be maintained for 115-v wiring.
Control status indicator light flashes rapidly and furnace
does not operate if polarity is incorrect or if the furnace is not
grounded.
2. Thermostat wire connections at terminals R, W, G,
and Y must be made at 24-v terminal block on
furnace control.
3. Natural gas service pressure must not exceed 0.5
psig (14- in. w.c., 1125 Pa), but must be no less than
0.16 psig (4.5-in. w.c., 350 Pa).
4. Blower door must be in place to complete 115-v electrical circuit and supply power to the furnace
components.
!
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in intermittent
unit operation or performance satisfaction.
These furnaces are equipped with a manual reset limit
switch in burner assembly. This switch opens and
shuts off power to the gas valve if an overheat
condition (flame rollout) occurs in the burner
assembly/enclosure. Correct inadequate
combustion−air supply, improper gas pressure setting,
improper burner or gas orifice positioning, or improper
venting condition before resetting switch. DO NOT
jumper this switch.
Before operating furnace, check flame rollout manual reset
switch for continuity. If necessary, press button to reset
switch.
EAC-1 (115vac) terminal is energized whenever blower
operates. HUM (24vac) terminal is only energized when the
low pressure switch (LPS) is closed on a call for heat.
Prime Condensate Trap with Water
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow these warnings could result in personal
injury or death.
Failure to use a properly configured trap or NOT
water-priming trap before operating furnace may allow
positive pressure vent gases to enter the structure
through drain tube. Vent gases contain carbon
monoxide which is tasteless and odorless.
1. Remove upper and middle collector box drain plugs
opposite of the condensate trap. (See Figure 10.)
2. Connect field-supplied 5/8-in. (16 mm) ID tube with attached funnel (see Figure 10) to upper collector box
drain connection.
3. Pour one quart (liter) of water into funnel/tube. Water
should run through collector box, overfill condensate
trap, and flow into open field drain.
4. Remove funnel; replace collector box drain plug.
5. Connect field-supplied 5/8-in. (16 mm) ID tube to
middle collector box drain port.
WARNING
6. Pour one quart (liter) of water into funnel/tube. Water
should run through collector box, overfill condensate
trap, and flow into open field drain.
7. Remove funnel and tube from collector box and
replace collector box drain plug.
Purge Gas Lines
If not previously done, purge the lines after all connections
have been made and check for leaks.
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Never purge a gas line into a combustion chamber.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made
specifically for the detection of leaks to check all
connections. A fire or explosion may result causing
property damage, personal injury or loss of life.
WARNING
Adjustments
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
DO NOT bottom out gas valve regulator adjusting
screw. This can result in unregulated manifold
pressure and result in excess overfire and heat
exchanger failures.
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in reduced
furnace life.
DO NOT redrill orifices. Improper drilling (burrs,
out−of−round holes, etc.) can cause excessive burner
noise and misdirection of burner flames. This can
result in flame impingement of heat exchangers,
causing failures. (See Figure 1.)
For proper operation and long term reliability the furnace
input rate must be within +/−2 percent of input rate on
furnace rating plate, or as adjusted for altitude.
WARNING
!
CAUTION
Figure 1 − Orifice Hole
BURNER
ORIFICE
A93059
440 04 6000 00 3
Specifications subject to change without notice.
The gas input rate on rating plate is for installations at
altitudes up to 2000 ft. (609.6M).
NOTICE
The NATURAL GAS manifold pressure adjustments in Table
4 compensate for BOTH altitude AND gas heating value. DO
NOT apply an additional de−rate factor to the pressures
shown in Table 4. The values in this Table and NOT
referenced to sea level; they are AS−MEASURED AT
ALTITUDE.
The heating content of natural gas at altitude may already
provide for a reduction in capacity or altitude. Refer to Table
4. No adjustments to the furnace may be necessary at
altitude for certain gas heating values.
Refer to the instructions provided in the factory-specified
LP/Propane conversion kit for instructions for setting gas
manifold pressures for LP/Propane applications.
In the USA, the input rating for altitudes above 2000 ft. (610
M) must be reduced by 2 percent for each 1000 ft. (305 M)
above sea level refer to Table 2. The natural gas manifold
pressures in Table 4 adjust for BOTH altitude and natural
gas heating value.
In Canada, the input rating must be reduced by 5 percent for
altitudes of 2000 ft. to 4500 ft. (610 to 1372 M) above sea
level. The natural gas manifold pressures in Table 4 adjust
for BOTH altitude and natural gas heating value.
NOTE: For Canadian altitudes of 2000 to 4500 ft. (610 to
1372 M), use USA altitudes of 2001 to 3000 ft. (611 to 914
M) in Table 4.
To adjust manifold pressure to obtain the proper input rate,
first, determine if the furnace has the correct orifice installed.
At higher altitudes or different gas heat contents, it may be
necessary to change the factory orifice to a different orifice.
Tables have been provided in the furnace installation
instructions to match the required orifice to the manifold
pressure to the heat content and specific gravity of the gas.
To do this:
1. Obtain average yearly gas heat value (at installed
altitude) from local gas supplier.
2. Obtain average yearly gas specific gravity from local
gas supplier.
3. Find installation altitude range for your installation in
the manifold pressure tables in Table 4.
4. Find closest natural gas heat value and specific gravity in Table 4. Follow heat value and specific gravity
lines to point of intersection to find orifice size and
low-and high-heat manifold pressure settings for
proper operation.
5. Check and verify burner orifice size in furnace.
NEVER ASSUME ORIFICE SIZE. ALWAYS CHECK
AND VERIFY.
(Furnace is shipped with No. 44 orifices. In this example, all
main burner orifices are the correct size and do not need to
be changed to obtain proper input rate.)
Manifold pressure: 3.4-in. w.c. (847 Pa).
NOTE: To convert gas manifold Table pressures to Pascals,
multiply the in.w.c. value by 249.1 Pa/in. w.c. (1 in. w.c. =
249.1 Pa).
Check Inlet Gas Pressure
The inlet gas pressure must be checked with the furnace
operating in maximum heat. This is necessary to make sure
the inlet gas pressure does not fall below the minimum
pressure of 4.5 in. w.c.
Adjust Manifold Pressure
NOTICE
If orifice hole appears damaged or it is suspected to have
been redrilled, check orifice hole with a numbered drill bit of
correct size. Never redrill an orifice. A burr−free and squarely
aligned orifice hole is essential for proper flame
characteristics.
6. Replace orifice with correct size, if required by Table
4. Use only factory−supplied orifices. See EXAMPLE
1.
EXAMPLE 1:
0 - 2000 ft. (0 - 609.6M) altitude
Heating value = 1050 Btu/cu ft.
4 440 04 6000 00
Specifications subject to change without notice.
Specific gravity = 0.62
Therefore: Orifice No. 44
1. Make sure the gas supply is turned off to the furnace
and at the electric switch on the gas valve.
2. Remove the 1/8 in. NPT plug from the inlet pressure
tap on the gas valve.
3. Connect a manometer to the inlet pressure tap on gas
valve.
4. Turn on furnace power supply.
5. Turn gas supply manual shutoff valve to ON position.
6. Turn furnace gas valve switch to ON position.
7. Jumper R and W thermostat connections at the
furnace control board.
8. When main burners ignite, confirm inlet gas pressure
is between 4.5 in. w.c. (1125 Pa) and 13.6 in. w.c.
(3388 Pa).
9. Remove jumper across thermostat connections to
terminate call for heat. Wait until the blower off delay
is completed.
10. Turn furnace gas valve electric switch to OFF
position.
11. Turn gas supply manual shutoff valve to OFF
position.
12. Turn off furnace power supply.
13. Remove manometer from the inlet pressure tap of the
gas valve.
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Re−install manifold pressure tap plug in gas valve to
prevent gas leak.
14. Apply pipe dope sparingly to end of inlet gas pipe
plug and re−install in the gas valve.
1. Adjust manifold pressure to obtain proper gas input
rate. (See Figure 3.)
a. Turn gas valve ON/OFF switch to OFF.
b. Remove manifold pressure tap plug from gas valve.
c. Connect a water column manometer or similar
device to manifold pressure tap.
d. Turn gas valve ON/OFF switch to ON.
e. Manually close blower door switch.
f. Jumper R and W thermostat connections on control
to start furnace. (See Figure 2.)
g. Remove regulator adjustment cap from gas valve
pressure regulator (See Figure 3.) and turn adjusting
screw (3/16 or smaller flat−tipped screwdriver)
counterclockwise (out) to decrease input rate or
clockwise (in) to increase input rate.
WARNING
NOTICE
DO NOT set low−heat manifold pressure less than 2.8−in.
w.c. (697 Pa) or more than 3.8−in. w.c. (947 Pa) for natural
gas. If required manifold pressure is outside this range,
change main burner orifices.
h. When correct input is obtained, replace cap that
conceals gas valve regulator adjustment screws.
Main burner flame should be clear blue, almost
transparent (See Figure 12.)
i. Remove jumper R to W.
j. Reinstall manifold pressure tap plug from gas valve.
2. Verify natural gas input rate by clocking meter.
NOTE: Contact your HVAC distributor or gas supplier for
metric gas meter Tables, if required.
a. Turn off all other gas appliances and pilots served by
the meter.
b. Jumper R to W.
c. Run furnace for 3 minutes.
d. Measure time (in sec) for gas meter to complete 1
revolution and note reading. The 2 or 5 cubic feet dial
provides a more accurate measurement of gas flow.
e. Refer to Table 3 for cubic ft. of gas per hr.
f. Multiply gas rate cu ft./hr by heating value (Btuh/cu
ft.) to obtain input. If clocked rate does not match
TWINNING AND/OR
BLOWER OFF-DELAY
COMPONENT TEST
TERMINAL
required input from Step 1, increase manifold
pressure to increase input or decrease manifold
pressure to decrease input. Repeat steps b through
e until correct input is achieved. Re−install regulator
seal cap on gas valve.
g. If clocked rate does not match required input from
Step 1, increase manifold pressure to increase
input or decrease manifold pressure to decrease
input. Repeat steps b through e of Step 1 until
correct heat input is achieved. Re--install regulator
seal cap on gas valve.
3. Restore furnace to normal operating condition.
a. Turn gas valve ON/OFF switch to OFF.
b. Remove water column manometer or similar
device from manifold pressure tap.
c. Replace manifold pressure tap plug to gas valve.
d. Turn gas valve ON/OFF switch to ON.
e. Check for gas leaks and verify furnace operation
!
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Reinstall manifold pressure tap plug in gas valve to
prevent gas leak.
J2 JUMPER
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
COOL
HEAT
BLOWER SPEED
SELECTION TERMINALS
G Com W Y R
24V
STATUS CODE LED
NUETRAL
BLW
COOL HEAT
SPARE-1
SPARE-2
BLOWER OFF-DELAY
J2
TEST/TWIN
0.5 AMP@24VAC
FUSE 3-AMP
SEC-2 SEC-1
EAC-2 L2
SPARE-1 SPARE-2
SP
90 150
HUM
ARE-3
PL1
1
120 180
PLT
SPARE-3
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
L1
PR-1
115 VAC (L1) LINE
VOLTAGE CONNECTION
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER 24-VAC
CONNECTIONS
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL2 1
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
Figure 2 − Example of Single Stage Furnace Control
440 04 6000 00 5
A11619
Specifications subject to change without notice.
Adjust Temperature Rise
NOTE: Blower door must be installed when taking
temperature rise reading. Leaving blower door off will result
in incorrect temperature measurements, due to possible
changes in duct static pressure and airflow.
!
CAUTION
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in:
S Overheating the heat exchangers or
condensing flue gases in heat exchanger
areas not designed for condensate.
S Shortened furnace life.
S Component damage.
Temperature rise must be within limits specified on
furnace rating plate. Recommended operation is at
midpoint of rise range or slightly above.
Jumper R to W to check gas-heat temperature rise. Do not
exceed temperature rise ranges specified on unit rating
plate.
This furnace must operate within the temperature rise
ranges specified on the furnace rating plate. Determine the
air temperature as follows:
1. Place duct thermometers in return and supply ducts
as close to furnace as possible. Be sure
thermometers do not “see” heat exchangers so that
radiant heat does not affect thermometer readings.
This is particularly important with straight−run ducts.
2. When thermometer readings stabilize, subtract
return−air temperature from supply−air temperature to
determine temperature rise.
If the temperature rise is outside this range, check the
following:
1. Gas input rate.
2. Derate for altitude if applicable.
3. Return and supply ducts for excessive restrictions
causing static pressures greater than 0.50−in. w.c.
(125 Pa)
4. Adjust temperature rise by adjusting blower speed.
S Increase blower speed to reduce temperature rise.
S Decrease blower speed to increase temperature
rise.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect 115vac electrical power before changing
speed tap.
(Read following caution before changing taps).
!
CAUTION
UNIT DAMAGE HAZARD
To avoid operating outside the rise range and avoid
component damage:
Refer to the Air Delivery Tables to determine which
airflows and settings are allowed for proper heating
airflow. DO NOT use the highlighted settings for
Heating airflow. The highlighted settings are to be used
for Cooling and Continuous Fan ONLY.
Change the blower speed taps as required to maintain
proper temperature rise for Heating and Cooling as
described above. To change blower motor speed selections
for heating mode, remove blower motor lead from control
HEAT terminal(s). (See Figure 2) Select desired blower
motor speed lead(s) from the other motor leads and relocate
it/them to HEAT (heating blower tap) terminal(s). Reconnect
original lead on SPARE terminal.
Adjust Blower Off Delay (Heat Mode)
If desired, the main blower off time delay period may be
lengthened or shortened when operating in the heating
mode to provide greater comfort. For position and location
of jumpers on control center. (See Figure 2 and Figure 16)
The blower off-delay has four adjustable settings from 90
sec to 180 sec. (See Table 1) To change the blower off
delay setting, move the jumper from one set of pins on the
control to the pins used for the desired blower off delay.
Factory blower off-delay setting is 120 sec.
Table 1 – Blower Off Delay Jumper Positions
PINS 1 AND 2 2 AND 3 3 AND 4 4 AND 5
Time (in sec.) 90 120 150 180
Adjust Cooling Airflow
The cooling airflow can be set from the remaining blower
speed taps. Refer to the Air Delivery Tables in these
instructions.
!
CAUTION
FURNACE OVERHEATING HAZARD
Failure to follow this caution may result in reduced
furnace life.
Recheck temperature rise. It must be within limits
specified on the rating plate. Recommended operation
is at the mid--point of rise range or slightly above.
Adjust Thermostat Heat Anticipator
Mechanical thermostat: Set thermostat heat anticipator to
match the amp. draw of the electrical components in the
R-W circuit. Accurate amp. draw readings can be obtained
at the wires normally connected to thermostat sub-base
terminals, R and W. The thermostat anticipator should NOT
be in the circuit while measuring current.
1. Remove thermostat from sub-base or from wall.
2. Connect an amp. meter across the R and W
sub-base terminals or R and W wires at wall.
3. Record amp. draw across terminals when furnace is
in low heat and after blower starts.
4. Set heat anticipator on thermostat per thermostat
instructions and install on sub-base or wall.
5. Install blower access door.
Electronic thermostat: Set cycle rate for 3 cycles per hr.
Check Safety Controls
The flame sensor, gas valve, and pressure switch were all
checked in the Start−up procedure section as part of normal
operation.
1. Check Main Limit Switch
This control shuts off combustion system and
energizes air−circulating blower motor, if furnace
overheats. By using this method to check the temperature limit control, it can be established that the limit is
functioning properly and that the limit will operate if
there is a restricted return−air supply or motor failure.
If the limit control does not function during this test,
the cause must be determined and corrected.
a. Run furnace for at least 5 minutes.
b. Gradually block off return air with a piece of
cardboard or sheet metal until the limit trips.
c. Unblock return air to permit normal circulation.
6 440 04 6000 00
Specifications subject to change without notice.
d. Burners will re−light when furnace cools down.
2. Check Pressure Switch(es)
This control proves operation of the draft inducer
blower.
a. Turn off 115−v power to furnace.
b. Disconnect inducer motor lead wires from wire
harness.
c. Turn on 115−v power to furnace.
d. Set thermostat to “call for heat” and wait 1 minute.
When low pressure switch is functioning properly, hot
surface igniter should NOT glow and control
diagnostic light flashes a status code 31. If hot
surface igniter glows when inducer motor is
disconnected, shut down furnace immediately.
e. Determine reason low pressure switch did not
function properly and correct condition.
f. Turn off 115−v power to furnace.
g. Reconnect inducer motor wires, replace door, and
turn on 115−v power.
h. Blower will run for 90 sec before beginning the call
for heat again.
i. Furnace should ignite normally.
Checklist
1. Put away tools and instruments. Clean up debris.
2. Verify that the jumper is removed from the TEST/
TWIN terminal. Verify that there is nothing plugged into the PLT connector.
NOTE: If there is a jumper connector plugged into PLT,
remove it and discard. (See Figure 2)
3. Verify that the Blower/Heat Off Delay jumpers are set
as desired. (See Figure 2 and Figure 16)
4. Verify that the blower (lower door in upflow position)
and control (“Main” or upper door in upflow position)
doors are properly installed.
5. Verify that the Status LED glows. If not, check that the
power supply is energized and that the blower door is
secure. See Figure 5 to interpret diagnostic codes
6. Cycle test furnace with room thermostat to be sure
that it operates properly with the room thermostat.
Check all modes including Heat, Cool and Fan.
7. Check operation of accessories per manufacturer’s
instructions.
8. Review Owner’s Manual with owner.
9. Attach literature packet to furnace.
Table 2 – Altitude Derate Multiplier for U.S.A.
ALTITUDE PERCENT
FT. M
OF
DERATE
0–2000 0−610 0 1.00
2001–3000 610−914 4−6 0.95
3001–4000 914−1219 6−8 0.93
4001–5000 1219−1524 8−10 0.91
5001–6000 1524−1829 10−12 0.89
6001–7000 1829−2134 12−14 0.87
7001–8000 2134−2438 14−16 0.85
8001–9000 2438−2743 16−18 0.83
9001–10,000 2743−3048 18−20 0.81
*Derate multiplier factors are based on midpoint altitude for altitude range.
DERATE
MULTIPLIER
FACTOR*
.
SINGLE-STAGE
ON/OFF Switch
1/2” NPT Inlet
1/8” NPT Inlet
Pressure Tap
Regulator Seal Cap
Regulator Adjustment
Regulator Seal Cap under Cap
1/8” NPT Manifold
Pressure Tap
1/2” NPT Outlet
Figure 3 − Gas Valve
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
HOOK-AROUND
AMMETER
R Y W G
10 TURNS
FROM UNIT 24-V
CONTROL TERMINALS
EXAMPLE:
5.0 AMPS ON AMMETER
10 TURNS AROUND JAWS
0.5 AMPS FOR THERMOSTAT
=
ANTICIPATOR SETTING
Figure 4 − Amp. Draw Check with Ammeter
A11153
A96316
440 04 6000 00 7
Specifications subject to change without notice.
SECONDS
FOR 1 REVOLUTION
10 360 720 1800 50 72 144 360
11 327 655 1636 51 71 141 355
12 300 600 1500 52 69 138 346
13 277 555 1385 53 68 136 340
14 257 514 1286 54 67 133 333
15 240 480 1200 55 65 131 327
16 225 450 1125 56 64 129 321
17 212 424 1059 57 63 126 316
18 200 400 1000 58 62 124 310
19 189 379 947 59 61 122 305
20 180 360 900 60 60 120 300
21 171 343 857 62 58 11 6 290
22 164 327 818 64 56 11 2 281
23 157 313 783 66 54 109 273
24 150 300 750 68 53 106 265
25 144 288 720 70 51 103 257
26 138 277 692 72 50 100 250
27 133 267 667 74 48 97 243
28 129 257 643 76 47 95 237
29 124 248 621 78 46 92 231
30 120 240 600 80 45 90 225
31 116 232 581 82 44 88 220
32 113 225 563 84 43 86 214
33 109 218 545 86 42 84 209
34 106 212 529 88 41 82 205
35 103 206 514 90 40 80 200
36 100 200 500 92 39 78 196
37 97 195 486 94 38 76 192
38 95 189 474 96 38 75 188
39 92 185 462 98 37 74 184
40 90 180 450 100 36 72 180
41 88 176 439 102 35 71 178
42 86 172 429 104 35 69 173
43 84 167 419 106 34 68 170
44 82 164 409 108 33 67 167
45 80 160 400 110 33 65 164
46 78 157 391 112 32 64 161
47 76 153 383 116 31 62 155
48 75 150 375 120 30 60 150
49 73 147 367
Table 3 – Gas Rate (CU ft./hr)
SIZE OF TEST DIAL
1 Cu Ft. 2 Cu Ft. 5 Cu Ft. 1 Cu Ft. 2 Cu Ft. 5 Cu Ft.
SECONDS
FOR 1 REVOLUTION
SIZE OF TEST DIAL
8 440 04 6000 00
Specifications subject to change without notice.
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