4
2551988C
Typical Schematic (All Top Connections)
Note: Other connection arrangements may be used.
Components
A
Primary circuit flow
B
Primary circuit return
E
Dwelling flow
F
Dwelling return
G
Connection for safety
discharge
Primary Circuit Side
1
Insulated plate heat exchanger
2
Pressure Independent
Control Valve (PICV) with
actuator
3
Heat meter
Cooling Secondary Side Circuit
4
Expansion vessel
5
Low pressure switch
6
Safety relief discharge
7
Pressure gauge
8
Dwelling circulation pump
Controls & Other Items
9
Electronic control board
10
Room controller
11
Flushing Bypass kit
12
Filling loop (External)
S1
– Primary flow temperature sensor
S2
– Primary return temperature
sensor
S4
– Dwelling flow temperature sensor
S5
– Dwelling return temperature
sensor
