Patterson-Kelley TBIG-03 用户手册

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)

 

 

 

 
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. 

 
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

 
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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