Temperature Adjustment
DANGER
Water temperature over 52°C (125°F) can cause severe burns instantly or death from scalds.
Children, disabled and elderly are at highest risk of being scalded.
See instruction manual before setting temperature at the storage tank.
Feel water before bathing or showering.
Temperature limiting valves are available, see man- ual.
Thermostats are factory set at 140°F (60°C). The thermo- stat operates automatically. It can be adjusted to provide a higher or lower water temperature.
If water temperature adjustment is required:
1.Turn the electrical supply "OFF".
2.Remove the access door and insulation pad.
3.Check with a voltage tester at terminal 1 and 3 of the limit control that power is indeed "OFF".
4.Adjust the thermostat to the water temperature desired.
5.Ensure insulation pad is in the door cavity. Replace access door(s).
6.Turn the electrical supply "ON".
WARNING:
Risk of scalding
There is a hot water scald potential if the thermostat is set too high.
Adjusting the thermostat past the 49°C (120°F) bar on the temperature dial will increase the risk of scald injury. Hot water can cause severe burns in:
1 1/2 seconds at. . . . . . . . . . . . . . 66°C (150°F)
3 seconds at . . . . . . . . . . . . . . . . . 60°C (140°F)
20 seconds at . . . . . . . . . . . . . . . . 54°C (130°F)
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
V) 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 connect- ed to a discharge line that terminates at an adequate drain.
CAUTION
The
Standing clear of the outlet (discharged water may be hot), slowly lift and release the lever handle on the temper- ature 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 qualified 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 flushed 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:
Initial Temperature Adjustment
1.For the temperature controlled IWH, ensure the tem- perature set point is 11°C (20°F) higher than the storage tank set point.
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CAUTION
The water being drained can be extremely hot! The drain hose should be rated for at least 93°C (200°F). If the drain hose does not have this rating, open the cold water supply valve and a nearby hot water faucet served by the system until the water flow is no longer hot. Close the cold water supply valve and resume.
