START-UP
Pre Start-up
Filling System (Heating Boilers)
Fill system with water. Purge all air from the system.
Lower system pressure. Open valves for normal sys-
tem operation, and fill system through feed pressure.
Manually open air vent on the compression tank until
water appears, then close vent.
Air Purge (Domestic Hot Water
Heaters)
Purge all air from system before lighting heater. This
can be normally accomplished by opening a down-
stream valve.
XTherm heaters are equipped with an air vent installed
in the inlet side of the header to ensure that air is
purged from the system. It includes an adapter to allow
the air vent to be piped (in the field) to a suitable drain
as required by the jurisdiction having authority.
Venting System Inspection
1.
Check all vent pipe connections and flue pipe ma-
terial.
2.
Make sure vent terminations are installed per code
and are clear of all debris or blockage.
3.
Prime condensate traps in the vent system as nec-
essary and verify that the traps and drain lines are
free of debris or blockage.
For Your Safety
This appliance has a hot surface igniter. It is equipped
with an ignition device which automatically lights the
burners. Do not try to light the burners by hand.
WARNING:
If you do not follow these instructions
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
BEFORE OPERATING, smell all around the appliance
area for gas. Be sure to smell near the floor because
some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
•
Do not try to light any appliance.
•
Do not touch any electrical switch; do not use any
telephone in your building.
•
Immediately call your gas supplier from a neigh-
bor’s telephone. Follow the gas supplier’s
instructions.
•
If you cannot reach your gas supplier, call the fire
department.
•
Use only your hand to push in or turn the gas con-
trol knob. Never use tools. If the knob will not turn
by hand, do not try to repair it, call a qualified serv-
ice technician. Forced or attempted repair may
result in a fire or explosion.
•
Do not use this appliance if any part has been
under water, immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system and any gas control
which has been under water.
•
Check around unit for debris and remove com-
bustible products, i.e. gasoline, etc.
Pre Start-up Check
1.
Verify the heater is filled with water.
2.
Check system piping for leaks. If found, repair
immediately.
3.
Vent air from system. Air in system can interfere
with water circulation.
4.
Purge air from gas line to heater.
5.
Prime the heater condensate trap mounted in the
bottom of the secondary heat exchanger.
CAUTION:
An additional air vent should be
installed at the highest point in the system for proper
operation. If water piping is located higher than the
header, it should be relocated to the highest point in
the installed system.
WARNING:
Condensate trap must be primed prior
to heater start-up to prevent flue gas leakage
through the condensate management system. Verify
that traps maintain a prime under operating
conditions. Extended operation with non-condensing
conditions may require an engineered condensate
management system.
California Hot Water Supply, Inc.
(800) 249-7244
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