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Installation & Operation Manual
40
6 System piping
FLOW CHECK
VALVE (TYPICAL)
BALL VALVE
(TYPICAL)
EXPANSION
TANK
THERMOMETER
COLD WATER
SUPPLY
HOT WATER
SUPPLY
BUILDING
RETURN
DRAIN
TEMPERATURE
& PRESSURE
RELIEF VALVE
WATER HEATER
CIRCULATOR
(TYPICAL)
STORAGE
TANK
WATER
HEATER
(TYPICAL)
UNION
(TYPICAL)
MIXING VALVE
Figure 6-7 Double Heater - Single Tank
Model
Number of Units
2 3 4 5 6 7 8
Required Pipe Sizes in NPT
150 1 1/2" 2" 2" 2" 2 1/2" 3" 3"
199 1 1/2" 2" 2 1/2" 2 1/2" 3" 3" 4"
285 2" 2 1/2" 2 1/2" 3" 3" 4" 4"
399 2 1/2" 3" 3 1/2" 4" 4" 5" 5"
500 3" 3 1/2" 4" 5" 5" 5" 6"
600 3" 3 1/2" 4" 5" 5" 5" 6"
700 3" 4" 5" 5" 6" 6" 6"
800 3" 4" 5" 6" 6" 6" 6"
NOTICE
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
for all equipment and detailing required by local codes.
The piping will not support the weight of the water heater circulator pump. Do not attempt to support the
weight of the water heater circulator pump with the piping or its accessories. Refer to the pump
manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or
substantial property damage.
ƽ CAUTION