Installation & Operation Manual
34
6
System piping
FLOW CHECK
VALVE (TYPICAL)
BALL VALVE
(TYPICAL)
EXPANSION
TANK
THERMOMETER
COLD WATER
SUPPLY
HOT WATER
SUPPLY
BUILDING
RETURN
DRAIN
(TYPICAL)
TEMPERATURE
& PRESSURE
RELIEF VALVE
(TYPICAL)
FLOW
SWITCH
(TYPICAL)
WATER HEATER
CIRCULATOR
(TYPICAL)
STORAGE TANK
(TYPICAL)
WATER
HEATER
(TYPICAL)
UNION
(TYPICAL)
MIXING VALVE
Figure 6-8
Double Heater - Double Tank
Model
Number of Units
2
3
4
5
6
7
8
Required Pipe Sizes in NPT
150
1 1/2"
2"
2"
2 1/2" 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"
4"
4"
5"
5"
500
2 1/2"
3"
4"
4"
4"
5"
6"
