Patterson-Kelley TBIG-03 - Manual (Page 9)

Installation
shutoff valves (located at the end of the supplied gas
train) from the gas and propane supply systems during
any pressure testing of the system at pressures in ex-
cess of 1/2 psig (14 inches W.C.).
During any pressure testing of the gas supply piping
system at pressures equal to or less than 1/2 psig (14
inches W.C.), the boiler should be isolated from the
gas supply piping system by closing both manual
shutoff valves.
Some leak test solutions, including soap and water,
may cause corrosion. These solutions should be
rinsed off with water after testing.
4.2.1 Gas Bleeds and Vents
vent to outside air
drip leg
n.o. vent
valve (I.R.I
installations)
Figure 4-3 Schematic Diagram of Bleeds and Vents
Gas vents to outdoor air must be provided for the
pressure regulators and gas pressure switches. If ap-
proved by authorities having jurisdiction, vents may
be manifolded in accordance with accepted engineer-
ing practices to minimize backpressure.
The pilot regulator is equipped with a vent limiting
device and does not require external venting!
If equipped for I.R.I. (Industrial Risk Insurers) the
normally open vent valve must be vented independ-
ently from other vented devices, as shown above.
4.3 P RE -S TART C HECK L IST
Before firing the boiler make sure the following items
have been completed.
1. Flue gas from the boiler is properly vented.
2. Gas connections have been made and the gas lines
purged of air.
3. Water connections are complete, and the boiler
and system have been filled and purged of air.
4. The boiler is connected to a 120 volt power source
with a lockable disconnect (customer supplied)
having adequate overload protection.
5. Combustion air openings are not obstructed in any
way and have adequate capacity.
6. The boiler is placed the proper distance from any
combustible walls, in accordance with the "Clear-
ances" section of the “Installation and Owner’s
Manual,” page 3.
7. Relief valves have been piped to floor drains.
4.4 P
RE -S TART S AFETY C HECKS AND
A DJUSTMENTS
Before placing the boiler in operation, perform all the
following safety checks and adjustments. This work
must be performed by qualified service personnel.
Warning! High voltage! Shock hazard. Properly lock-
out/tagout the electrical service and all other energy
sources before working on or near the machine.
For testing control circuits only, the service power
shutoff switch (located inside the auxiliary panel at the
rear of the boiler) may be used to de-energize the sys-
tem in lieu of normal lockout/tagout procedures. Use
extreme caution when using this alternative.
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