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Technical Literature Department 3 of 52 Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent
ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
INSTRUCTION MANUAL
Have a copy of the Instruction Manual that came with the water heater on hand for the
correct model water heater you are working with before servicing.
Installation information given in this Service Manual is not a complete installation
instruction. Installation information covered in this Service Manual has a limited focus as it
applies to servicing. This Service Manual does not replace or supersede the Instruction
Manual that came with the water heater. Always refer to the Instruction Manual that came
with the water heater for complete installation instructions.
If the Instruction Manual is not on hand copies can be obtained from the manufacturers web
site or by calling the technical support phone number shown on the water heater labeling.
TOOLS REQUIRED
• Instruction Manual that came with the water heater.
• All tools common to installation and service of commercial water heaters such as hand
tools, torch, pipe wrenches etc.
• Long (8-10”) T handle SAE hex (allen key) wrenches including 5/32”, 1/8” and 1/4” - for
blower, burner, and gas valve removal and installation.
• Two digital manometers range -20.00 to +20.00" W.C., resolution - 0.01" W.C.
Recommend UEI model EM200 or equivalent. Required to test performance of air
pressure switches. Also used to measure low pressure supply gas and manifold gas
pressure.
• Digital Multi Meter DMM; recommend Fieldpiece HS36, Fluke 187, UEI DL289 or
equivalent capable of measuring:
• AC/DC Voltage
• AC Frequency (Hz)
•Ohms
• DC micro amps µA (flame sensing current)
• AC amp meter- recommend UEI model DL289 or equivalent.
• 120 VAC household outlet tester (see Service Notes Electrical page 8)