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Use piping materials and joining methods acceptable
1.
to authority having jurisdiction. In absence of such
requirements:
•
National Fuel Gas Code, ANSI Z223.1/NFPA 54
Ground joint union should be installed for easy removal of
gas control for servicing. Drip leg or trap must be installed
at bottom of vertical section of piping at inlet to boiler. Pipe
compound resistant to action of liquefi ed petroleum gases
must be used on all threaded pipe connections. Check with
local utility for location of manual shutoff valve if required.
Figure 11.
Gas line should be of adequate size to prevent undue
2.
pressure drop and never smaller than pipe size of main
gas control valve. See Chart below.
Boiler and its gas connection must be leak tested
3.
before placing boiler in operation.
Boiler and its individual shutoff valve must be
4.
disconnected from gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
Boiler must be isolated from gas supply piping system
by closing its individual manual shutoff valve during
any pressure testing of gas supply piping system at
test pressures equal to or less than 1/2 psi (3.5 kPa).
Min. Supply Pressure
Max. Supply Pressure
Manifold Pressure
ELECTRICAL WIRING
See wiring diagrams on the following four pages for
details.
Boiler must be electrically bonded to ground in accordance
with the requirements of the authority having jurisdiction
or, in the absence of such requirements, with the National
Electrical Code, ANSI/NFPA 70.
IMPORTANT: Install fused disconnect switch between boiler
and electrical panel at convenient location.
CONNECTING GAS SERVICE
Natural Gas
Propane
5.0" w.c.
11.0" w.c.
13.5" w.c.
13.5" w.c.
3.5" w.c.
10.5" w.c.
ELECTRICAL SECTION
!
Do not use an open fl ame.
Figure 11
Maximum Capacity Of Pipe In Cubic Feet Of Gas/Hour
(Gas Pressure = 0.5 psig or less, Pressure Drop = 5 in.
w/c)
Length of
Pipe (Feet)
½"
10
175
20
120
30
97
40
82
60
66
80
57
100
50
For additional information refer to the National Fuel Gas
Code Handbook.
THERMOSTAT INSTALLATION
Thermostat should be installed on inside wall about
1.
four feet above fl oor.
NEVER install thermostat on outside wall.
2.
Do not install thermostat where it will be affected by
3.
drafts, hot or cold pipes, sunlight, lighting fi xtures,
televisions, a fi replace, or chimney.
Check thermostat operation by raising and lowering
4.
thermostat setting as required to start and stop
burners.
Instructions for fi nal adjustment of thermostat
5.
are packaged with thermostat (adjusting heating
anticipator, calibration, etc.)
14
WARNING
Nominal Iron Pipe Size
¾"
1"
360
680
250
465
200
375
170
320
138
260
118
220
103
195
1¼"
1400
950
770
660
530
460
400
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