SCEPD0051A
LEGEND
COMMERCIAL ELECTRIC (2 UNITS) WITH VERTICAL STORAGE TANK
TEMPERATURE & PRESSURE
RELIEF VALVE
PRESSURE RELIEF VALVE
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
FULL PORT BALL VALVE
CHECK VALVE
CIRCULATING PUMP
TEMPERATURE GAGE
TANK TEMPERATURE CONTROL
WATER FLOW SWITCH
DRAIN
HOT WATER
TO FIXTURES
PIPE T & P TO
OPEN DRAIN
FUSED
DISCONNECT
SWITCH
PIPE T & P TO
OPEN DRAIN
STATE
STORAGE TANK
FUSED
DISCONNECT
SWITCH
HOT WATER
RETURN
ALT. COLD WATER
CONNECTION
COLD WATER
SUPPLY
EXPANSION TANK
FINISHED FLOOR
NOTES:
1. Preferred piping diagram.
2. The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system.
3. Service valves are shown for servicing unit. However, local codes shall govern their usage.
4. The tank temperature control should be wired to and control the pump between the water heater(s) and the storage tank(s).
5. The water heater’s operating thermostat should be set 5°F higher than the tank temperature control.
June 2011 | Printed in U.S.A. | © State Water Heaters
For Technical Information and Automated Fax Service, call 800-365-0024 or visit www.statewaterheaters.com.
State Water Heaters reserves the right to make product changes or improvements without prior notice.
SCEPD0051A | PAGE 1 of 1
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