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E-Proper Combustion
Furnace should operate minimum 15 minutes with correct
manifold pressure and gas ow rate before checking com-
bustion. Take combustion sample beyond the ue outlet
and compare to the tables below.
TABLE 20
EL195
Model
CO
2
% For Nat CO
2
% For LP
040 6.3 - 7.8 n/a
060 6.5 - 8.2 8.4 - 9.9
080 7.2 - 8.4 9.0 - 10.4
100 7.3 - 8.5 n/a
The maximum carbon monoxide reading should not exceed 100ppm.
F- Proper Ground and Voltage
WARNING
Electric Shock Hazard. Can cause injury
or death. Unit must be properly grounded
in accordance with national and local
codes.
A poorly grounded furnace can contribute to premature
ignitor failure. Use the following procedure to check for
ground and voltage to the integrated control.
1 - Measure the AC voltage between Line Neutral
(spade terminals) and “C” terminal (low voltage
terminal block) on the integrated control. See gure
58. A wide variation in the voltage between Line
Neutral and “C” as a function of load indicates a
poor or partial ground. Compare the readings to the
table below. If the readings exceed the maximum
shown in table 21, make repairs before operating
the furnace.
2 - In addition, measure the AC voltage from Line Hot
to Line Neutral (spade terminals) on the integrated
control. See gure 58. This voltage should be in the
range of 97 to 132 Vac.
TABLE 21
Furnace Status
Measurement VAC
Expexcted Maximum
Power On Furnace Idle 0.3 2
CAI / Ignitor Energized 0.75 5
Indoor Blower Energized Less than 2 10
CHECK VOLTAGE BETWEEN LINE NEUTRAL
AND LOW VOLTAGE “C” TERMINAL
Red LED
Recall
Red LED
Recall
CHECK VOLTAGE BETWEEN LINE
HOT AND LINE NEUTRAL
FIGURE 58
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