PART NO. 100266523
– 7 –
INITIAL TEMPERATURE ADJUSTMENT
1. For the temperature controlled IWH, ensure the
temperature set point is 11°C (20°F) higher than the
storage tank set point.
2. If at the end of the recovery cycle, the IWH is OFF but the
circulator pump does not turn OFF automatically, reduce
the storage tank thermostat set point until the pump shuts
off. Check that pump is off.
TEMPERATURE LIMIT CONTROL
For safety, a non-adjustable high limit temperature switch will
shut off the power when excessive water temperatures are
reached. This switch must be re-set manually.
MAINTENANCE
TEMPERATURE AND PRESSURE RELIEF VALVE
Manually operate the temperature and pressure relief valve
at least once a year to make sure it is working properly. To
prevent water damage, the valve must be properly connected
to a discharge line that terminates at an adequate drain.
•
Burn hazard.
•
Hot water discharge.
•
Keep clear of
temperature-pressure
relief valve discharge.
BURN
HOT
HOT
DANGER
Standing clear of the outlet (discharged water may
be hot),
slowly lift and release the lever handle on the
temperature and pressure relief valve (see Figure 5) to allow
the valve to operate freely and return to its closed position.
If the valve fails to completely reset and continues to release
water, immediately turn "OFF" the electrical supply to the
tank, close the cold water supply valve and call a quali
fi
ed
service technician.
TEMPERATURE AND
PRESSURE RELIEF VALVE
MANUAL RELIEF VALVE
DISCHARGE LINE TO DRAIN
Figure 5. T&P Relief Valve Test
DRAINING AND FLUSHING
It is recommended that the storage tank be drained and
fl
ushed every 6 months to remove sediment that may build
up during operation. The storage tank should also be drained
if being shut down for extended periods of time. To drain the
tank, perform the following steps:
•
Burn hazard.
•
Hot water discharge.
•
Keep hands clear of drain
valve discharge.
BURN
HOT
HOT
DANGER
1. Turn "OFF" the electrical supply to the tank.
2. Close the cold water supply valve.
3. Open a nearby hot water faucet served by the system.
4. Connect a hose to the drain valve and route it to an
adequate drain.
5. Open the drain valve and allow all the water to drain from
the tank.
6. Open the cold water supply valve and flush the tank as
needed to remove sediment and any other foreign matter
that may have entered the system. Close the cold water
supply valve when clean water flows.
7. Perform any other servicing as required.
8. Close the drain valve, disconnect hose and refill the tank
(see "Filling" section). If the water heater is going to be
shut down for an extended period, the drain valve should
be left open.
9. Turn "ON" the electrical supply to the tank.
