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7
System piping
Figure 7-7 Double Heater - Double Tank
STORAGE
TANK
The piping will not support the weight of the water heater circulator pump. Do not attempt to support
CAUTION
⚠
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.
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
NOTICE
for all equipment. The installer must follow all manufacturer's instructions for each system component. The
installer is responsible for compliance with local codes.
46
T
HOT WATER
SUPPLY
STORAGE
TANK
BALL VALVE
EXPANSION TANK
(TYPICAL)
BUILDING
FLOW CHECK
RECIRCULATION
VALVE
FILTER
CIRCULATION
FLOW SWITCH
PUMP
MIXING VALVE
DRAIN PORT
Installation & Operation Manual
Model
2
3
Required Pipe Sizes in NPT (Based on 30° △)
400
2 1/2"
3"
500
3"
4"
650
3"
4"
800
4"
4"
1000
4"
6"
COLD WATER
SUPPLY
STRAINER / FILTER
PIPING
TEMPERATURE &
PRESSURE
RELIEF VALVE
T
TEMPERATURE
GAUGE
UNION
DIR #2000589734 00
Number of Units
4
5
6
7
4"
4"
6"
6"
4"
4"
6"
6"
4"
6"
6"
6"
6"
6"
6"
6"
6"
6"
8"
8"
BUILDING
RETURN
WATER
HEATER
WATER
HEATER
8
6"
6"
6"
8"
8"
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