Haier GE NF80DS, Installation Instructions Manual

Page: 28 / 35

507332-02G / 31-5000663 Page 28 of 35 Issue 2209
Table 17. Manifold Pressure Settings and Pressure Switch
Capacity Gas
Line Pressure
(in. w.c.)
0 - 4,500 ft. 4,501 - 7,500 ft. 7,501 - 10,000 ft.
Min. Max.
Orifice
Size
(in)
Manifold
Pressure
(in w.c.)
Pressure
Switch
Orifice
Size
(in)
Manifold
Pressure
(in w.c.)
Pressure
Switch
Orifice
Size
(in)
Manifold
Pressure
(in w.c.)
Pressure
Switch
045
Nat 4.5 10.0
No Change
0.0625”
3.5
No
Change
No Change
0.0625”
3.5
No
Change
51W01
0.0550”
3.5
74W89
-0.55” w.c.
LP/Propane 11.0 13.0
11K50
0.034”
10.0
11K50
0.034
10.0
11K45
0.032”
10.0
070
Nat 4.5 10.0
No Change
0.0625’
3.5
No Change
0.0625”
3.3
51W01
0.0550”
3.5
LP/Propane 11.0 13.0
11K50
0.034”
10.0
11K50
0.034
10.0
11K45
0.032”
10.0
090
Nat 4.5 10.0
No Change
0.0625’
3.5
No Change
0.0625”
3.3
51W01
0.0550”
3.5
LP/Propane 11.0 13.0
11K50
0.034”
10.0
11K50
0.034
10.0
11K45
0.032”
10.0
110
Nat 4.5 10.0
No Change
0.0625’
3.5
No Change
0.0625”
3.3
74W60
-0.60” w.c.
51W01
0.0550”
3.5
LP/Propane 11.0 13.0
11K50
0.034”
10.0
11K50
0.034
10.0
74W60
-0.60” w.c.
11K45
0.032”
10.0
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 :
3. While waiting for the unit to stabilize, observe the
flame. Flame should be stable and should not lift from
burner. Natural gas should burn blue.
4. After allowing unit to stabilize for 5 minutes, record
manifold pressure and compare to value given in
Table 17.
NOTE:
Shut unit off and remove manometer as soon as an
accurate reading has been obtained. Take care to remove
barbed fitting and replace threaded plug.
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 the tables below. The maximum carbon
monoxide reading should not exceed 100 ppm.
Table 15.
Capacity CO
2
% for Nat. CO
2
% for LP
-045
7.2 - 7.8 7.5 - 9.0
-070
-090
-110
High Altitude
The manifold pressure may require adjustment to ensure
proper combustion at higher altitudes. Refer to Table 17 for
manifold pressure and pressure switch change.
Other Unit Adjustments
Primary and Secondary Limits
The primary limit is located on the heating compartment
vestibule panel. The secondary limits (if equipped) are
located in the blower compartment, attached to the back
side of the blower. These auto reset limits are factory set
and require no adjustment.
Flame Rollout Switches
This manually reset switches are located on the front of the
burner box.
Pressure Switch
The pressure switch is located in the heating compartment
adjacent to the combustion air inducer. The switch checks
for proper combustion air inducer operation before allowing
ignition trial. The switch is factory set and requires no
adjustment.
Temperature Rise
After the furnace has been started, and supply and return
air temperatures have been allowed to stabilize, check
the temperature rise. If necessary, adjust the blower
speed to maintain the temperature rise within the range
shown on the unit nameplate. See Table 18 for allowable
heating speeds. Increase the blower speed to decrease
the temperature. Decrease the blower speed to increase
the temperature rise. Failure to adjust the temperature rise
may cause erratic limit operation.