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VZ-VZH-VZT-IOM (08-24) 1047121-A
OPERATION
⚠ DANGER ⚠
• For your safety, read before operating. 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 does not have a pilot. It is equipped with an ignition device that automatically
lights the burner. Do not try to light the burner by hand.
• Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle on the floor.
• WHAT TO DO IF YOU SMELL GAS:
a. Do not try to light any appliance.
b. Do not touch any electrical switch; do not use any phone in your building.
c. Leave the building immediately.
d. Immediately call your gas supplier from a phone remote from the building. Follow the gas
supplier’s instructions.
e. If you cannot reach your gas supplier, call your fire department.
• Should overheating occur, or the gas supply control system fail to shut off the flow of gas, turn
off the combination gas valve to the appliance before shutting off the electrical supply.
• 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.
• All components of a gas supply system must be leak tested prior to placing equipment in service.
NEVER TEST FOR LEAKS WITH AN OPEN FLAME. Failure to comply could result in personal
injury, property damage, or death.
• For vented systems, failure to provide proper venting will result in a health hazard that could
cause serious personal injury or death.
• Never restrict or otherwise alter the supply of combustion air to any heater. Maintain the vent or
vent/combustion air system in a structurally-sound and proper operating condition.
Pre-Startup Checklist
Check the following before startup:
Check to ensure that installation has been carried out in accordance with these instructions.
Check to ensure that electrical and gas supplies are isolated.
Open burner cabinet access door and ensure that all internal components are secure and that all connections
are securely made.
Check suspension—unit must be secure and level.
Check to ensure that clearances from combustibles are in accordance with Table 2.
Check vent system to ensure that it is installed in accordance with Vent Connections section.
Check piping for leaks and proper gas line pressure and bleed trapped air from gas lines (refer to Supply Piping
Connections section).
Check electrical wiring—ensure that all wire gauges are as recommended—verify that fusing or circuit breakers
are adequate for load use.
Check polarity—verify that line voltage exists between black (live) wire and earth ground.
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