Install Instructions

Part Number 550-142-902/1016
CGi
GAS-FIRED WATER BOILER — SERIES 3 — Boiler Manual
30
Gas piping5
Table 7 Pipe capacity for 0.60 specific gravity natural gas
Natural Gas:
1. Refer to Table 7forpipelengthanddiameter.Baseonrated
boiler input (divide by 1,000 to obtain cubic feet per hour).
Table 7 is only for gas with specific gravity 0.60, with a
pressure drop through the gas piping of 0.30” w.c.
For
additionalgaspipesizinginformation,refertoANSIZ223.1/
NFPA54(orB149.1orB149.2forCanadianNaturalGasand
PropaneInstallationCode).
2. Inlet pressure required at gas valve inlet:
• Maximum:13”w.c.
• Minimum:5”w.c.
• Manifoldgaspressure:3.5”w.c.
3. Install100%lockupgaspressureregulatorinsupplyline
if
inlet pressure exceeds 13” w.c.
Adjustfor13”w.c.maxi-
mum.
Propane Gas:
1. Contactgassuppliertosizepipes,tanksand100%lockup
gas pressure regulator.
2. Adjustpropanesupplyregulatorprovidedbygassupplierfor
13”w.c.maximumpressure.
3. Inlet pressure required at gas valve inlet:
• Maximum:13”w.c.
• Minimum:11”w.c.
• Manifoldgaspressure:10”w.c.
Connecting gas supply piping to
boiler
1. Remove jacket front panel and refer to Figure 26 to pipe gas
to boiler.
a.
Install drip leg at inlet of gas connection to boiler.
Where local utility requires drip leg to be extended to
the floor, use appropriate length of pipe between cap
and tee.
b.
Install ground joint union for servicing, when re-
quired.
c.
Install manual shutoff valve in gas supply piping out-
side boiler jacket when required by local codes or utility
requirements.
d.
In Canada — When using manual main shutoff valve, it
must be identified by the installer.
2.
Support piping with hangers, not by boiler or its accessories.
3.
Purge all air from gas supply piping.
4. Beforeplacingboilerinoperation,
check boiler and its gas
connection for leaks
.
a.
Close manual main shutoff valve during any pressure
testingatlessthan13”w.c.
b.
Disconnect boiler and gas valve from gas supply
piping
duringanypressuretestinggreaterthan13”w.c.
Do not check for gas leaks with an open
flame
— use bubble test. Failure to use bubble
test or check for gas leaks can cause severe
personal injury, death or substantial property
damage.
5.
Use pipe dope compatible with propane gases. Apply
sparingly only to male threads of pipe joints so that pipe dope
does not block gas flow.
Failure to apply pipe dope as detailed above
can result in severe personal injury, death or
substantial property damage.
Figure 26 Gas supply piping
Gas pipe
length
(feet)
Capacity of pipe for pipe size of:
(Capacity in cubic feet gas per hour)
½” ¾” 1” 1¼” 1½”
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 860
40 63 130 245 500 760
50 56 115 215 440 670
75 45 93 175 360 545
100 38 79 150 305 460
150 31 64 120 250 380