Hubbell Electric Heater Company WATER HEATER DF - Manual (Page 4)

4
SAFETY TEMPERATURE AND PRESSURE RELIEF VALVE (T&P)
A listed and properly rated combination temperature and pressure relief valve shall be installed in the
opening provided and marked for this purpose at the time of installation. Local codes shall govern
installation of relief devices. The pressure rating of the relief valve must not exceed the working
pressure shown on the rating plate affixed to the front of the water heater. The BTU/H rating of the
relief valve must equal or exceed the water heater input shown on the rating plate. The relief valve
discharge line must terminate 6 inches above the floor drain or externally to building. The discharge
line must be able to withstand water temperature in excess of 210°F.
¾ DO NOT install a valve between tank and the relief valve.
¾ DO Install a discharge line directly to an adequate open drain. The discharge line must be
shielded, secured and plumbed to an appropriate drain to prevent scald injury.
¾ DO NOT install a reducing coupling or other restriction in the discharge line.
¾ DO NOT install the discharge line where it may be subject to blocking, plugging or freezing.
¾ DO NOT allow water from discharge line to contact any live electrical part.
Failure to install a listed and properly rated temperature and pressure relief valve could result in
hazard to life, bodily injury or property damage and will release the manufacturer of this water heater
from any claim which might result from excessive water temperature or pressure.
CAUTION
KEEP CLEAR OF DISCHARGE LINE OUTLET. It is hot enough to cause scald injury, is under
pressure and may splash.
IMPORTANT
¾ Periodically check combustion products to assure that carbon monoxide is kept below 0.02%
(200 PPM) or that the CO
2
is kept between 9 & 9 ½%.
¾ Drain the water heater for 5 minutes every day to help prevent accumulation of sediment and
scale. Periodically check for the presence of scale and sediment. If present, physically
loosen and flush using high-pressure water.
¾ All startup, periodic tuning and service must be performed by a trained technician familiar
with the water heater and forced draft burner. It is mandatory that the startup test report,
contained in the burner installation and operation manual, be completed and a copy returned
to the factory. It is also important that an operating log be maintained to provide a history of
water heater performance.