Burnham ALPINE Installation, Operation And Service Instructions page 52

Vii. gas Piping (continued)
Table 16: Specific Gravity Correction Factors
Specific Correction
Gravity Factor
0.60 1.00
0.65 0.96
0.70 0.93
0.75 0.90
0.80 0.87
0.85 0.81
1. Use methods and materials in accordance with local
plumbing codes and requirements of gas supplier. In
absence of such requirements, follow National Fuel
Gas Code, NFPA 54/ANSI Z223.1.
2. Use thread (joint) compounds (pipe dope) resistant
to action of liquefied petroleum gas.
3. Alpine (ALP) boilers have factory supplied
Miscellaneous Part Carton (P/N 101777-01
- ALP080 thru ALP210; 101777-02 - ALP285;
1012942-03 - ALP399 and ALP500), which includes
gas piping components to connect boiler gas valve
to gas supply system. Install these components prior
to connecting boiler to gas supply system piping as
follows:
a. Locate and remove either ½" NPT x 6" long
black nipple and ½" NPT external gas shutoff
valve (ALP080 thru ALP210), or ¾" NPT x
6" long black nipple and ¾" NPT external gas
shutoff valve (ALP285 thru ALP500).
b. Feed the appropriate nipple through factory
installed jacket left side panel grommet (refer
to Figure 1A or 1B for gas supply connection
identification) and screw the nipple into boiler
gas valve inlet port.
c. Mount the appropriate external gas shutoff valve
onto the threaded nipple end outside of the jacket
left side panel.
d. Install sediment trap, ground-joint union and
manual shut-off valve upstream of mounted
factory supplied manual shut-off valve. See
Figure 34A.
4. All above ground gas piping upstream from manual
shut-off valve must be electrically continuous and
bonded to a grounding electrode. Do not use gas
piping as grounding electrode. Refer to National
Electrical Code, NFPA 70.
C.
Pressure test. See Table 17 for Alpine Min./Max.
Pressure Ratings. The boiler and its gas connection
must be leak tested before placing boiler in operation.
52
Specific Correction
Gravity Factor
0.90 0.82
1.00 0.78
1.10 0.74
1.20 0.71
1.30 0.68
1.40 0.66
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.
Table 1: Min./Max. Pressure Ratings
Natural/LP
Boiler
Gas Max.
Model
Pressure
No.
(in. w.c.)
ALP080
ALP105
ALP150
14
ALP210
ALP285
ALP399
ALP500 13.5
Figure a: Recommended gas Piping
LP Gas
Natural Gas
Min. Pressure
Min. Pressure
Inlet to Gas
Inlet to Gas Valve
Valve
(in. w.c.)
(in. w.c.)
4.0
11.0
4.5