Lochinvar ARMOR 151 Installation And Operation Manual page 42

Condensing water heateer
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6
System piping
Figure 6-7 Double Heater - Single Tank
COLD WATER
SUPPLY
FLOW CHECK
VALVE (TYPICAL)
BUILDING
RETURN
HOT WATER
SUPPLY
THERMOMETER
TEMPERATURE
& PRESSURE
RELIEF VALVE
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 and detailing required by local codes.
42
EXPANSION
TANK
MIXING
VALVE
DRAIN
Installation & Operation Manual
Number of Units
Model
2
3
Required Pipe Sizes in NPT
151
1 1/2"
2"
200
1 1/2"
2"
2 1/2" 2 1/2"
286
2"
2 1/2" 2 1/2"
400
2 1/2"
3"
3 1/2"
501
3"
3 1/2"
601
3"
3 1/2"
701
3"
4"
801
3"
4"
WATER HEATER
CIRCULATOR
(TYPICAL)
4
5
6
7
2"
2"
2 1/2"
3"
3"
3"
3"
3"
4"
4"
4"
5"
4"
5"
5"
5"
4"
5"
5"
5"
5"
5"
6"
6"
5"
6"
6"
6"
WATER
HEATER
(TYPICAL)
UNION
(TYPICAL)
BALL VALVE
(TYPICAL)
Y-STRAINER
(RECOMMENDED)
8
3"
4"
4"
5"
6"
6"
6"
6"

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