PB Heat 211A - Manual (Page 31)

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CONNECT GAS PIPING
A. INSTALL GAS TRAIN
1. The Gas Control Train(s) supplied with this boiler:
• Has been factory assembled and tested for
tightness of joints.
• Must be re-tested after installation with a soap
suds test to assure it is still leak-tight after
assembly.
• Must be isolated from the gas supply piping
during testing of the supply piping.
2. Assemble the Gas Control Train(s) to the Manifold
with the ground joint union(s) provided. See Figure
7.1. Models 211A-04 through 211A-18 are supplied
with a single Gas Control Train. Models 211A-19
and larger are supplied with two or more Gas
Control Trains.
3. Support the Gas Control Train(s) with a permanent
brace.
B. CONNECT PILOT GAS TUBING
1. Use 3/8" aluminum tubing or as required by local
codes.
2. Connect the Pilot Line to the Pilot Cock Assembly
supplied with the Gas Control Train.
3. Connect tubing to each pilot.
a. Connect electronic pilots to the Pilot Gas Valves.
b. Connect standing pilots (when supplied – see
Table 2.2) to the thermopilot valves.
c. Install thermocouples in the standing pilots and
connect to the thermopilot valves.
C. INSTALL VENT AND BLEED PIPING
1. Gas Pressure Regulator
a. Connect regulator vent outlet to outside
atmosphere using 1/4" tubing or as required by
local codes.
b. Terminate the tubing downward to prevent water
from entering the tubing and protect from any
obstruction.
c. Terminate the tubing above and well away from
normal breathing level or building air intakes.
2. Diaphragm Gas Valves
a. Pipe diaphragm gas valve bleed lines to outside
atmosphere unless the boiler is equipped with a
standing pilot. On standing pilot boilers, pipe the
valve bleed lines to the bleed piping pre-installed
to the pilot burner.
b. Use 1/4" tubing or as required by local codes.
Always pipe the bleed lines separate from the
regulator vent lines.
7. CONNECT GAS PIPING
Figure 7.1: Gas Control Train and Burner Assembly, Single Natural Gas Control Train Shown
(Models 211A-19 and Larger Use Two or More Gas Control Trains)