User Manual

INSTALLATION PHW-IOM-2013-0214 SECTION 2

2-28

system may be considered water tight.

10. When purging is completed, make sure the following are open—

combination shut-o /purge valve, shuto valve to pressure reducing ( ll

valve), shuto valve in cold water  ll line, and shuto valve in return line.

11. Make sure the following are closed--all drain cocks, the vent on the

combination shuto -purge valve, and all manual vents. Reset zone valves

to normal mode of operation and turn o power to boiler.

12. Open gas shuto valve, allowing gas to  ow to boiler.

Installation Checkpoints

§ Do not turn on the boiler unless it is  lled with water as shown by

indicating light on panel box.

§ Check that the front door of the air decoupler box is closed. Door must be

closed before starting the boiler. Do not open during operation.

§ Set the temperature control to the desired setting. Refer to Operation

section of this manual for setting the setpoint.

§ Open the manual shut o gas valve.

§ Close the circuit breaker or the fuse disconnect.

§ Turn the on-o switch to “ON.”

Testing Ignition Safety Shut Oﬀ

Perform the following:

1. Open gas shut o valve, allowing gas to  ow to boiler.

2. Close gas shut o valve.

3. Reset low gas pressure switch.

4. Turn on the boiler. The boiler will run through its purge and trial for ignition

cycle. After 6 seconds of ignition trial, the boiler will recycle. Switch the

boiler o .

5. Open the gas shut o valve.

6. Restart the boiler.

Measure Gas Flow Rate

Perform the following:

1. Turn o the boiler and close the manual gas shuto valve. Remove

manifold (downstream) pressure test plug from the 90 degree elbow.

4 CAUTION

Never leave an opened manual air vent

unattended. In the event an opened vent is

left unattended, water damage can occur.