Alpine Installation, Operating, and Service Instructions

70 103448-02 - 6/13
Boiler
Model
No.
Natural/LP
Gas Max.
Pressure
(in. w.c.)
Natural Gas
Min. Pressure
Inlet to Gas
Valve
(in. w.c.)
LP Gas
Min.
Pressure
Inlet to Gas
Valve
(in. w.c.)
ALP080B
14 4.0 11.0
ALP105B
ALP150B
ALP210B
ALP285B
ALP399
Table 24: Min./Max. Pressure Ratings
VII. Gas Piping (continued)
C. Pressure test. See Table 24 for Alpine Min./Max.
Pressure Ratings. The boiler and its gas connection
must be leak tested before placing boiler in operation.
1. Protect boiler gas control valve. For all testing over
½ psig, boiler and its individual shutoff valve must
be disconnected from gas supply piping. For testing
at ½ psig or less, isolate boiler from gas supply
piping by closing boiler’s individual manual shutoff
valve.
2. Locate leaks using approved combustible gas non-
corrosive leak detector solution.
D. Gas Piping for Multiple Boiler Installation
1. Individual module (boiler) gas pipe sizing specic
details – see paragraph A.
2. Individual module (boiler) recommended gas piping
detail - see Figure 42.
3. An additional gas pressure regulator(s) may need to
be to installed to properly regulate inlet gas pressure
at the smallest individual module (boiler).
DANGER
Do not use matches, candles, open ames or
other ignition source to check for leaks.
WARNING
If gas pressure in the building is above ½ psig,
an additional gas pressure regulator is required.
Using one additional regulator for multiple
boilers may result in unsafe boiler operation.
The additional regulator must be able to properly
regulate gas pressure at the input of the smallest
boiler. If the regulator cannot do this, two or
more additional regulators are required. Consult
regulator manufacturer and/or local gas supplier
for instructions and equipment ratings.