32
RP-HRPD-IOM (07-22) 132210-B
ADJUSTMENTS—CONTINUED
Measure and Adjust Manifold (Outlet) Gas Pressure—Continued
High Elevation (>2,000 Feet/609 Meters) Installations—Continued
For high elevation (>2,000 feet/609 meters) installations that require orifice replacement, replace the burner orifices
as follows:
1 . Determine model number and rated input (BTUh) from unit’s rating plate .
2 . Determine appropriate orifice replacement (refer to
) for installation elevation .
3 . Unthread existing gas orifices from gas manifold .
⚠ DANGER ⚠
• Do not use Teflon tape or pipe joint compound on the orifice threads. The hole in the orifice may
become blocked and may cause fire, explosion, property damage, carbon monoxide poisoning,
personal injury, or death.
• Use only using factory-supplied orifices. Do not attempt to drill out orifices in the field. Improperly
drilled orifices may cause fire, explosion, carbon monoxide poisoning, personal injury, or death.
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.
Table 20. High Elevation Burner Orifices
Installation
Elevation
(Feet (Meters))
Installation
Location
RP
Unit Size
Natural Gas
Propane
PN
Orifice Size
PN
Orifice Size
2001–3000
(611–915)
US
125, 175, 225, 300, 350, 400
84437
#42
11834
#54
150,250
38678
#45
11830
#55
200
11833
#44
11830
#55
2001–4500
(611–1373)
Canada
125, 175, 225, 300, 350, 400
11828
#43
11834
#54
150,250
38678
#45
11830
#55
200
11833
#44
11830
#55
3001–4000
(916–1220)
US
125, 175, 225, 300, 350, 400
11828
#43
11834
#54
150,250
38678
#45
11830
#55
200
11833
#44
11830
#55
4001–5000
(1221–1525)
US
125, 175, 225, 300, 350, 400
11828
#43
11834
#54
150,250
38678
#45
11830
#55
200
11833
#44
11830
#55
5001–6000
(1526–1830)
US
125, 175, 225, 300, 350, 400
11828
#43
97360
1 .35 mm
150,250
16590
#46
39658
#56
200
38678
#45
39658
#56
6001–7000
(1831–2135)
US
125, 175, 225, 300, 350, 400
11833
#44
97360
1 .35 mm
150,250
84853
#47
39658
#56
200
38678
#45
39658
#56
7001–8000
(2136–2440)
US
125, 175, 225, 300, 350, 400
11833
#44
11830
#55
150,250
84853
#47
39658
#56
200
16590
#46
39658
#56
8001–9000
(2441–2745)
US
125, 175, 225, 300, 350, 400
38678
#45
11830
#55
150, 250
40414
#48
39658
#56
200
84853
#47
39658
#56
9001–10,000
(2746–3045)
US
125, 175, 225
16590
#46
11830
#55
150, 250
40414
#48
39658
#56
200
84853
#47
39658
#56
300, 350, 400
38678
#45
11830
#55
