13
CONNECTING GAS SERVICE
ELECTRICAL SECTION
Connect gas service from meter to control assembly in
1.
accordance with ANSI Z223.1 and local codes or utility.
A ground joint union should be installed for easy removal
of gas control for servicing. A drip leg or trap must be
installed at the bottom of a vertical section of piping at the
inlet to the boiler. A pipe compound resistant to the action
of liquified petroleum gases must be used on all threaded
pipe connections. Check with the local utility for location
of manual shutoff valve if required. (
Figure #13
)
Figure #13
The gas line should be of adequate size to prevent undue
2.
pressure drop and never smaller than the pipe size of the
main gas control valve. (See Chart)
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)
Nominal Iron Pipe Size
½”
¾”
1”
1¼”
10
175
360
680
1400
20
120
250
465
950
30
97
200
375
770
40
82
170
320
660
60
66
138
260
530
80
57
118
220
460
100
50
103
195
400
For additional information refer to the National Fuel Gas Code
Handbook.
To check for leaks in gas piping, use a soap and water
3.
solution or other approved method.
Do not use an open flame!!
WARNING
!
Disconnect boiler from gas supply piping system during
4.
any pressure testing of the gas piping. After reconnecting,
leak test gas connection and boiler piping before placing
boiler back into operation.
Natural Gas
Propane
Min. Supply Pressure
5" w.c.
11" w.c.
Max. Supply Pressure
14" w.c.
14" w.c.
Manifold Pressure
3.5" w.c.
10.5" w.c.
ELECTRICAL WIRING
See wiring diagrams on the following two
pages for details.
Electrical wiring must conform with the National Electrical
Code, ANSI/NFPA No 70 latest edition when installed in the
United states, the CSA C22.1 Canadian Electrical Code, Part
1, when installed in Canada, and/or the local authority having
jurisdiction.
When an external electrical source is utilized,
the boiler, when installed, must be electrically
grounded in accordance with these require-
ments.
WARNING
!
IMPORTANT: Install a fused disconnect
switch between boiler and electrical panel at
a convenient location.
THERMOSTAT INSTALLATION
Thermostat should be installed on an inside wall about
1.
four feet above the floor.
NEVER install a thermostat on an outside wall.
2.
Do not install a thermostat where it will be affected by
3.
drafts, hot or cold pipes, sunlight, lighting fixtures, televi
-
sions, a fireplace, or a chimney.
Check thermostat operation by raising and lowering ther
-
4.
mostat setting as required to start and stop the burners.
Instructions for the final adjustment of the thermostat are
5.
packaged with the thermostat (adjusting heating anticipa-
tor, calibration, etc.)
