65
SSCBL-RPBL-IOM (10-22) 149159-C
4 . Thread replacement gas orifices into gas manifold . To prevent cross-threading, hand-tighten orifices into gas
manifold until snug and then tighten one-half to one turn using wrench .
⚠ DANGER ⚠
DO NOT use an open flame to check for gas leaks.
5 . Check all connections for gas leaks using commercial leak-detecting fluid or rich soap and water solution . Leaks
are indicated by presence of bubbles . If leak is detected, tighten connection . If leak cannot be stopped by tightening
connection, replace part(s) .
Conversion to LP (Propane)
⚠ DANGER ⚠
Conversion to LP (propane) gas must be performed by qualified service personnel using a factory-
supplied conversion kit. Failure to use the proper conversion kit can cause fire, explosion, property
damage, carbon monoxide poisoning, personal injury, or death.
If LP (propane) conversion is required, convert the unit in accordance with form
OPT-GC
listed in
. When
conversion is complete, verify that the input rate is correct .
Dirty Filter Switch Adjustment
After the unit is started but before continuous operation, the dirty filter switch must be set as follows:
1 . With clean filters in place, blower doors closed, and blower operating, decrease pressure setting by adjusting
setscrew on switch (see
) clockwise until indicator light is energized or setscrew is bottomed out .
2 . At that point, adjust setscrew three full turns counterclockwise or until setscrew is top-ended .
3 . At that setpoint, indicator light will be activated at approximately 50% filter blockage .
Table 31. Burner Orifices
Installation
Elevation
(Feet (Meters))
Installation
Location
Unit Size
Natural Gas
Propane
Orifice Size
PN
Orifice Size
PN
0–2000
(0–610)
US
400, 600, 700, 800, 1050, 1200
#42
84437
1 .45 mm
61652
500
#44
11833
#55
11830
2001–3000
(611–915)
US
400, 600, 700, 800, 1050, 1200
#42
84437
#54
11834
500
#45
38678
#55
11830
2001–4500
(611–1373)
Canada
400, 600, 700, 800, 1050, 1200
#43
11828
#54
11834
500
#45
38678
#55
11830
3001–4000
(916–1220)
US
400, 600, 700, 800, 1050, 1200
#43
11828
#54
11834
500
#45
38678
#55
11830
4001–5000
(1221–1525)
US
400, 600, 700, 800, 1050, 1200
#43
11828
#54
11834
500
#45
38678
#55
11830
5001–6000
(1526–1830)
US
400, 600, 700, 800, 1050, 1200
#43
11828
1 .35 mm
97360
500
#46
16590
#56
39658
6001–7000
(1831–2135)
US
400, 600, 700, 800, 1050, 1200
#44
11833
1 .35 mm
97360
500
#47
84853
#56
39658
7001–8000
(2136–2440)
US
400, 600, 700, 800, 1050, 1200
#44
11833
#55
11830
500
#47
84853
#56
39658
8001–9000
(2441–2745)
US
400, 600, 700, 800, 1050, 1200
#45
38678
#55
11830
500
#48
40414
#56
39658
9001–10,000
(2746–3045)
US
400, 600, 700, 800
#46
16590
#55
11830
500
#48
40414
#56
39658
1050, 1200
#45
38678
#55
11830
