Prestige Excellence, Руководство по установке и обслуживанию

Страница: 62 / 114

55
Start-Up Preparation
Unrepaired system leaks will cause con-
tinual makeup water to be added to the
boiler. Continual makeup water will
cause mineral buildup within the heat
exchanger, reducing the heat transfer,
causing possible heat buildup and even-
tual heat exchanger failure.
Check Low Water Cut-Off Device
- The PRESTIGE Excellence is provided with
a factory installed LWCO device that mea-
sures system pressure of more than 10 psi.
- Remove the front jacket panel and check for
continuity across the low water cut-off
device wire terminals. The contacts should
be closed when system pressure is greater
than 10 psi. See item 6, on Fig. 34 page 74
for location of the LWCO.
Check For Gas Leaks
Prior to start-up and during initial opera-
tion, smell near the floor and around the
unit for gas odorant or any unusual odor.
Do not proceed with the start-up if there
is any indication of a gas leak. Any leaks
found must be repaired immediately.
Propane installations only - The propane
supplier mixes an odorant with the
propane to make its presence detectable.
In some cases the odorant can fade and
the gas may no longer have an odor.
Prior to start-up of the unit and periodi-
cally after start-up have the propane
supplier check and verify the odorant
level.
Check Thermostat Circuit
- Disconnect the external thermostat wires
from the low voltage terminal strip.
- Connect a voltmeter across the wire ends of
the external thermostat wiring.
- Close each thermostat, zone valve and
relay in the external circuit one zone at a
time and check the voltage reading across
the wire ends.
- There should NEVER be voltage measured
at the wire ends.
- If voltage is measured at the panel under any
condition, check and correct the external
wiring.
In systems using 3-wire zone valves,
backfeed of voltage to the unit is a com-
mon problem. Use an isolation relay to
prevent voltage from the external circuit
entering the PRESTIGE Excellence con-
trol panel.
- Reconnect the external thermostat
wires to the low voltage terminal strip.
Inspection of Condensate Drain Assembly
1. Inspect and ensure the Condensate Drain
Assembly is properly installed as described
on page 22 and shown in Fig. 14 on page 23.
2. Remove the plug from the Condensate
Drain Assembly and fill with fresh water.
The condensate drain assembly must be
filled with water when the PRESTIGE
Excellence is in operation. The conden-
sate drain assembly prevents flue gas
emissions from entering the condensate
line. Failure to ensure trap is filled with
water could result in severe personal
injury or death.
3. Re-Install plug in condensate drain assem-
bly.
NOTICE
NOTICE
WARNING
WARNING
WARNING