SECTI
ON
3
: O
PER
AT
ION
30
H2O BOILER
HC SERIES IOM Manual
3.3
Commissioning
Purge heat exchanger coils in accordance with the procedure outlined in paragraph
I
of
section 3.2.
Measure and meter the flow rate through the unit to be at least at the minimum of flow
rates indicated in Table 1.
Connect (plug in) the power supply to the proper outlet. Turn the “ON/OFF” switch to the
“ON” position.
After the system has undergone the sequence of events described in Section 3.1 above and
when the two safety shut off valves in the main gas line are opened, the unit will be in
regular operating mode.
The Dungs air pressure switch installed on the side of the burner/ blower has been factory
set at 0.3” wc.
The boiler should be purged of any combustible gases before starting.
Test Points
o
Measure gas line pressure upstream of the gas pressure regulator to ensure it is
within the specified range of 7” – 14” wc.
o
Measure the gas manifold pressure at the test point located adjacent to the
burner’s gas inlet connection port; ensure it is within the specified range on the
burner label.
WARNING:
The gas manifold pressure should not exceed the maximum value shown on
the unit’s nameplate.
D-VAC Sales Inc. Email: [email protected] Tel: (516) 256-3131 www.dvachvac.com
