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F− Proper Gas Flow (Approximate)
Gas Flow (Approximate)
TABLE 14
GAS METER CLOCKING CHART
EL195
Unit
Seconds for One Revolution
Natural
LP
1 cu ft
Dial
2 cu ft
Dial
1 cu ft
Dial
2 cu ft
DIAL
−045
80
160
200
400
−070
55
110
136
272
−090
41
82
102
204
−110
33
66
82
164
Natural−1000 btu/cu ft LP−2500 btu/cu ft
NOTE
− To obtain accurate reading, shut off all other gas
appliances connected to meter.
Furnace should operate at least 5 minutes before check-
ing gas flow. Determine time in seconds for
two
revolu-
tions of gas through the meter. (Two revolutions assures a
more accurate time).
Divide by two
and compare to time
in table 14. If manifold pressure matches table 13 and rate
is incorrect, check gas orifices for proper size and restric-
tion. Remove temporary gas meter if installed.
G− Proper Combustion
Furnace should operate at least 15 minutes with correct
manifold pressure and gas flow rate before checking com-
bustions. Take sample beyond the flue outlet and
compare to table 15.
TABLE 15
EL195
Unit
CO
2
%
For Nat
CO
2
%
For LP
−045
7.2 − 8.2
8.6 − 9.6
−070
−090
−110
The maximum carbon monoxide reading should not exceed 50 ppm.
H− High Altitude
NOTE
− In Canada, certification for installations at eleva-
tions over 4500 feet (1372 m) is the jurisdiction of local au-
thorities.
EL195DF units require no manifold pressure adjustments
for operation at altitudes up to 10,000 feet (3048 m) above
sea level. Units installed at altitude of 4501 − 10,000 feet
(1373 to 3048m) require a pressure switch change which
can be ordered separately. Table 16 lists conversion kit and
pressure switch requirements at varying altitudes.
The combustion air pressure switch is factory−set and re-
quires no adjustment.
NOTE
− A natural to LP/propane gas changeover kit is nec-
essary to convert this unit. Refer to the changeover kit
installation instruction for the conversion procedure.
TABLE 16
Conversion Kit and Pressure Switch Requirements at Varying Altitudes
EL195
Unit
Natural to
LP/Propane
High Altitude
Natural Burner
Orifice Kit
High Altitude
LP/Propane
Burner Orifice Kit
High Altitude Pressure Switch
0 − 7500 ft
(0 − 2286m)
7501 − 10,000 ft
(2286 − 3038m)
7501 − 10,000 ft
(2286 − 3038m)
4501 − 7500 ft
(1373 − 2286m)
7501 −10,000 ft
(2286 − 3048m)
−045
*69W73
73W37
*68W68
No Change
80W60
−070
80W66
80W59
−090
80W65
80W59
−110
80W66
80W59
* Conversion requires installation of a gas valve manifold spring which is provided with the gas conversion kit.
Pressure switch is factory set. No adjustment necessary. All models use the factory−installed pressure switch from 0−4500 feet (0−1370 m).
