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Pre Start-up
Filling System (Heating Boilers)
Fill system with water. Purge all air from the system.
Lower the system pressure. Open valves for normal
system 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.
Raypak offers an optional air vent for the MVB heaters
which can be screwed directly into the inlet side of the
header to ensure that air is purged from the system.
This option also includes an adapter to allow the air
vent to be piped (in the field) to a suitable drain as re-
quired 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.
For Your Safety
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
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.
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
neighbor’s telephone. Follow the gas supplier’s in-
structions.
• 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 ser-
vice 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 techni-
cian to inspect the appliance and to replace any part
SECTION D
Start-up