25
10. Startup Preparation
Purge air and sediment from each zone of the hydronic system
4.
through the purge valves. Open air vents to allow air to be
vented from the zones.
Open manual air vent. Once the air has stopped escaping, close
5.
the manual air vent.
Once the system is completely filled and purged of all air and
6.
sediment, check the system pressure and check/repair any
leaks.
10.5 Check Low Water Cut Off
The CHALLENGER is equipped with a factory installed pressure
1.
sensor type Low Water Cut Off (LWCO).
The minimum operating CH system pressure is 7 psig [0.5bar]
2.
Compare CH system pressure gauge reading to CHALLENGER’s
3.
control pressure display reading, which can only be viewed when
control is ON and no CH call is present. Adjust system pressure
accordingly.
10.6 Check for Gas Leaks
10.7 Check Thermostat Circuit
Disconnect the external thermostat wires from the control
1.
terminal strip, located on the drop down panel.
Connect a voltmeter across the wire ends of the external
2.
thermostat wiring.
Energize each thermostat, zone valve, and relay in the external
3.
circuit individually and check the voltage reading across the wire
ends.
There should NEVER be voltage measured at the wire ends.
4.
If voltage is measure at the panel under any condition, check
5.
and correct the external wiring.
Reconnect the external thermostat wires to the control terminal
6.
strip.
10.8 Inspect Condensate Drain Assembly
Inspect and ensure the Condensate Drain Assembly is properly
1.
installed as described in Section 6.2 and shown in Fig. 9 on page
15.
Remove the Condensate Drain Assembly and fill with fresh
2.
water.
Reinstall the Condensate Drain Assembly.
3.
Prior to startup and during initial operation, smell near
the floor and around the appliance for gas odorant or
any unusual odor. Do not proceed with the startup if
there is any indication of a gas leak. Any leaks found
must be repaired immediately.
WARNING
Propane Installations Only
The propane supplier mixes an odorant with the
propane to make it’s presence detectable. In some
cases the odorant can fade and the gas may no longer
have an odor.
Prior to startup of the appliance, and periodically after
startup, have the propane supplier check and verify
odorant level.
WARNING
In systems using 3-wire zone valves, backfeed of volt-
age to the appliance is a common problem. Use an iso-
lation relay to prevent voltage from the external circuit
entering the CHALLENGER control panel.
NOTICE
The condensate drain assembly must be installed on
the appliance and filled with water when the CHAL-
LENGER is in operation. The condensate drain assem-
bly prevents flue gas emissions from entering the
condensate line. Failure to ensure trap is filled with
water can result in severe personal injury or death.
Unrepaired system leaks will cause continual makeup
water to be added to the system. Continual makeup
water could cause mineral buildup within the heat ex-
changer, reducing the heat transfer, causing possible
heat buildup and eventual heat exchanger failure.
WARNING
WARNING
Summary of Contents for CC105s
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