Haier GE APPLIANCES NF80D045S3A Service Manual page 19

Proper Combustion
Furnace should operate a minimum 15 minutes with correct
manifold pressure and gas flow rate before checking
combustion. Take combustion sample beyond the flue
out let and compare to Table 8. The maximum carbon
monoxide reading should not exceed 100 ppm.
Capacity CO²% For Nat
-045
-070
7.2 - 7.8
-090
-110
Table 8.
Line Pressure
(in. w.c.)
Capacity Gas
Min.
Nat 4.5
045
LP/Propane 11.0
Nat 4.5
070
LP/Propane 11.0
Nat 4.5
090
LP/Propane 11.0
Nat 4.5
110
LP/Propane 11.0
NOTE: A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.NOTE:
31-5000736 Rev. 0
CO²% For LP
7.5 - 9.0
0 - 4,500 ft.
Orifice Manifold
Max. Size Pressure
(in) (in w.c.)
No Change
10.0 3.5
0.0625"
11K50
13.0 10.0
0.034"
No Change
10.0 3.5
0.0625'
11K50
13.0 10.0
0.034"
No Change
10.0 3.5
0.0625'
11K50
13.0 10.0
0.034"
No Change
10.0 3.5
0.0625'
11K50
13.0 10.0
0.034"
Table 9. Manifold Pressure Settings and Pressure Switch
High Altitude
The manifold pressure may require adjustment and
combustion air pressure switch may need replacing to
ensure proper combustion at higher altitudes. Refer to
Table 9 for manifold pressure and pressure switch change.
For safety, shut unit off and remove manometer as soon
as an accurate reading has been obtained. Take care to
replace pressure tap plug.
4,501 - 7,500 ft.
Orifice Manifold
Pressure
Size Pressure
Switch
(in) (in w.c.)
No Change
3.5
0.0625"
11K50
10.0
0.034
No Change
3.3
0.0625"
11K50
10.0
0.034
No
Change
No Change
3.3
0.0625"
11K50
10.0
0.034
No Change
3.3
0.0625"
11K50
10.0
0.034
Page 19
IMPORTANT
7,501 - 10,000 ft.
Orifice Manifold
Pressure
Size Pressure
Switch
(in) (in w.c.)
3.5
11K45
0.032"
10.0
3.5
No 11K45
Change 0.032"
10.0
3.5
11K45
0.032"
10.0
74W60
3.5
-0.60" w.c.
11K45
0.032"
74W60
10.0
-0.60" w.c.
Pressure
Switch
74W89
-0.55" w.c.