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DURAWATT
®
ELECTRIC WATER HEATER
PV500-6 09/07 7
8. If an optional proportional sequencer is furnished, adjust set point to desired water temperature. (All other temperature
controls must be set above the sequencer’s set point.) Refer to manufacturer’s product literature for servicing,
operation and maintenance of proportional sequencer.
9. After startup and with the water heater operating, allow the water in the tank to reach the desired temperature and de-
energize the heating elements. Draw hot water from a nearby faucet or outlet until the heating elements come back
on. This will check for proper operation of the thermostats and other operating controls.
IMPORTANT: After approximately 30 minutes of operation, turn off all power to the unit. With main disconnect
off, check each wire connection and fuse clip for elevated temperature. If an elevated temperature is noted, there
is a loose connection at the point of greatest heat. All connections must be tight for proper performance.
MAINTENANCE
A preventative maintenance program is required to ensure a long trouble-free life of the water heater.
Maintenance Schedule
COMPONENT OPERATION INTERVAL REQUIRED
Tank Sediment Removal Every 3 Months Flushing
Relief Valve Inspect Every 6 Months Test
Electrical Connections Inspect Monthly Inspect for wire discoloration
Electric Elements Check Every 6 Months Amp Draw
Electric Elements Remove & Clean See Page 9
Flushing
1. Turn off the heater electrical disconnect switch.
2. Open the drain valve and allow water to flow until it runs clean.
3. Close the drain valve when finished flushing.
4. Turn on the heater electrical disconnect switch.
Draining the Tank
The heater must be drained if it is to be shut down and exposed to freezing temperature. Maintenance and service
procedures may also require draining the heater.
1. Turn off the heater electrical disconnect switch.
2. Close the cold water inlet and hot water outlet valve to heater.
3. Open a relief valve to vent the tank pressure.
4. Open the heater drain valve.
5. If the heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this period.