Elite EL-110 LP, Руководство по установке

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50
Boiler Manual
PART 9. START-UP PREPARATION
(CONTINUED)
4. At initial fill and during boiler startup and
testing, check system thoroughly for any
leaks. Repair all leaks before proceeding
further.
5. The system may have residual substances
that could affect water chemistry. After the
system has been filled and leak tested, verify
that water pH and chlorine concentrations are
acceptable by sample testing.
D. PURGE AIR FROM WATER SYSTEM
1. Purge air from system:
a. Connect a hose to the purge valve and
route hose to an area where water can
drain and be seen.
b. Close the boiler or system isolation valve
between the purge valve and fill
connection to the system.
c. Close zone isolation valves.
d. Open quick-fill valve on cold water make-
up line.
e. Open purge valve.
f.
One zone at a time, open the isolation
valves. Allow water to run through the
zone, pushing out the air. Run water until
no noticeable air flow is present. Close
the zone isolation valves and proceed
with the next zone. Follow this procedure
until all zones are purged.
g. Close the quick-fill water valve and purge
valve and remove the hose. Open all
isolation valves. Watch the system
pressure rise to correct cold-fill pressure.
It is recommended that you put the
pumps into manual operation to assist in
purging the circuits.
n
WARNING
Eliminate all system leaks. Continual fresh
make-up water will reduce boiler life. Minerals
can build up in the heat exchanger, reducing
heat transfer, overheating the heat exchanger,
and causing heat exchanger failure.
n
CAUTION
It is important that you purge the system of air
to avoid damage to the boiler.
h. Disconnect the wires that are connected
to the THERMOSTAT terminals of the cus-
tomer connection board. Apply power to
the boiler. The display will show the tem-
perature of the water in the boiler. Press
the
and
{ENTER}
keys simultaneously
and hold for 1 second. The Display will
say:
SERVICE PUMP CH
PUMP ON
11:47A
and the Central Heating Pump will come on. If
you then press the key the Central Heating
Pump will shut off, the display will say:
SERVICE PUMP DH
PUMP ON
11:47A
and the DHW pump will come on. If the boiler
is set up as the Cascade Master and you press the
key again, the DHW pump will shut off, the dis-
play will say:
SERVICE PUMP SH
PUMP ON
11:47A
and the system pump will come on. Using the
and keys in this manner you can toggle be-
tween running each pump in the system as re-
quired to help bleed out all entrapped air. Some
good indicators that air is removed include the ab-
sence of gurgling noises in the pipes and pump
operation becoming very quiet. Pressing
and
together at any time will return the boiler control
to normal operation.
i. After the system has operated for a
while, eliminate any residual air by using
the manual air vents located throughout
the system.
j. If purge valves are not installed in the
system, open manual air vents in system
one at a time, beginning with lowest
floor. Close vent when water squirts out.
Repeat with remaining vents.
k. Refill to correct pressure.