ICP 8MPT Installation Insrtuctions page 31

3. Repeat step 2 with jumper wire on R to Wl for Low Heat.
NOTE: If meter uses a 2 cubic foot dial, divide results (sec-
onds) by two.
NOTE: SWl DIP switch #3 must be in ON position. (See
furnace wiring diagram). Return SWl DIP switch #3 to pre-
vious setting after check.
Refer to Example. The Example is based on a natural gas BTU
content of 1,000 BTU's per cubic foot.
NaturalGas
BTUContent
per cu. foot
1,000
Example
No.ofSeconds TimePerCubic
PerHour FootinSeconds
3,600 48
1,000 x 3,600 + 48 = 75,000 BTUH
BTUPer
Hour
75,000
To Determine the appliance kW input rate from a .05m 3 test dial
that has been clocked at 80 seconds for one complete revolution.
Number of
seconds per
hour
3,600
Example (kW)
Number of
seconds per Size of test dial
complete (.05m 3)
rotation
80 .05
3,600 + 80 x .05 = 7.2 m3/h
2.25m3/h x 10.35 kWh/m3 = 23.28 kW
23.28 X 3.412 = 79,431 BTU
kW m3/h
2.25
4. Remove jumper wire from R to Wl and W2.
5. Relight all appliances and ensure all pilots are operating.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in
personal injury or death.
NOx inserts for use with Natural Gas units ONLY.
If Propane Gas is required, NOx inserts must be
removed.
Ignitor Location in(mm)
21/16(52.4)
NOTE: Flame sensor has a different orientation in all 050 models.
TemperatureRise Check
REDUCED FURNACE LIFE HAZARD
Failure to properly set the air temperature rise may
result in reduced furnace life.
Use ONLY the blower motor speed taps marked "Y" for
YES for setting air temperature rise.
Blower Motor Speed Taps for *8MPT Model Sizes
Model Heat LO M LO M HI HI
Sizes Stage RED BLUE ORN BLK
LO N Y Y Y
050B12 HI N Y Y N
LO N Y Y Y
075F14 HI N Y Y Y
LO N Y Y Y
100F14 HI N N Y Y
LO Y Y N N
100J20
HI N N Y Y
LO N N Y Y
125J20
HI N N Y Y
Main Burner Flame Check
Allow the furnace to run approximately 10 minutes. Then inspect
the main burner flames. See Figure 34.
Check for the following (Figure 34):
• Stable and blue flames. Dust may cause orange tips or
wisps of yellow, but flames MUST NOT have solid, yel-
low tips.
• Flames extending directly from burner into heat ex-
changer.
• Flames do NOT touch sides of heat exchanger
If any problems with main burner flames are noted, it may be nec-
essary to adjust gas pressures or check for drafts.
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
r Face
__ _-10-78
For ignitor location see Figure 35.
The blower speed MUST be set to give the correct air temperature
rise through the furnace as marked on the rating plate. Tempera-
ture rise is the difference between supply and return air tempera-
tures.
To check temperature rise,use the following procedure:
1. Place thermometers in supply and return air registers as
close to furnace as possible, avoiding direct radiant heat
from heat exchangers.
2. Operate furnace on High Heat for ten minutes with all the
registers and duct dampers open by using a jumper wire on
R to Wl and W2 thermostat connections on the furnace
control board.
Note: The SWl DIP switch #3 should be in the on position.
(See furnace wiring diagram)
3. Take readings and compare with range specified on rating
plate.
4. If the air temperature rise is not in the correct range, the
blower speed must be changed. A higher blower speed will
lower the temperature rise. A lower blower speed will in-
crease the temperature rise.
5. Repeat steps 2 thru 4 with the furnace operating on Low
Heat for 10 minutes by using a jumper wire on the R to Wl
thermostat connections on the furnace control board.
6,
Remove the jumper wire after the adjustments are com-
plete. Return SWl DIP switch #3 to previous setting.
31
Specifications are subject to change without notice
441 01 202301