507712-01
Page 30 of 36
Issue 1642
Input Size
Gas
Line
Pressure
(in. w
.c.)
0 - 2,000 ft.
2,000 - 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
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
No
Change
0.0625”
3.5
11K45
0.032”
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
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”
3.5
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
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”
3.5
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
11K50
0.034”
10.0
11K45
0.032”
10.0
11
0
Nat
4.5
10.0
No
Change
0.0625’
3.5
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
11K50
0.034”
10.0
11K45
0.032”.
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.
Table 13. Manifold Pressure Settings and Pressure Switch