5. Refer to table 5.4 for minimum supply pressure for
the purpose of input adjustment.
6. Install the boiler such that the gas ignition system
components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and
service (circulator replacement, condensate trap
clean out, control replacement, etc.)
7. The boiler and its gas connection must be leak tested
before placing the boiler in operation.
8. A typical gas train manifold is illustrated in Figure
5.2.
13
INSTALLATION AND OPERATING INSTRUCTIONS
Figure 5.2: Gas Train Manifold
Size
Supply
Pressure
(in. Water)
88
5.00
118
5.00
147
5.00
177
5.00
206
5.00
236
5.00
288
5.00
Table 5.4: Minimum Supply
Pressure Natural Gas
A. STEAM BOILER CONTROLS & TRIM
1. Safety Valve:
a. Pipe the boiler safety valve provided into the 3/4"
tapping on the left side of the boiler as shown in
Figure 6.1. Be sure that the relief valve is sized in
accordance with local code requirements. In
addition, be sure that the safety valve is designed
constructed and stamped in accordance with the
ASME Boiler and Pressure Vessel Code, Section IV.
b. If it is necessary to use a boiler relief valve larger
than 3/4" due to local codes, the relief valve
should be piped in the boiler skim tapping.
Do
not increase the pipe size between the
boiler and the valve.
c. Pipe the discharge of the safety valve to a
maximum of 12" from the floor. Pipe the outlet
close to a floor drain.
2. Drain Valve:
Install the 3/4" drain valve provided into the drain
tapping on the right hand side of the boiler. Refer to
Figure 6.2 for tapping location.
6. CONTROLS & TRIM
Figure 6.1
Figure 6.2: Steam Boiler Tapping Location
