ERS ECH Series - Page 65

7.3 Application 3
Space cooling and heating application without a room thermostat connected to the unit, but with heating/cooling thermostat controlling the fan
coil units. Heating is provided through floor heating loops and fan coil units. Cooling is provided through the fan coil units only.
NO. component NO. component NO. component
1
main unit 7 fill valve (field supply) FHL 1...n floor heating loop
1.1
water s i de heat excha nger 8 buffer tank (field supply) FCU 1...n fan coil units
1.2
safety valve 9 balance tank (field supply) M1...n motorized valve (field supply)
1.3
manual air purge valve
9.1
air purge valve
1.4
water flow switch
9.2
drain valve
1.5
manual water drain valve 10 expansion vessel (field supply)
2
y-shape filter 11
P_o:outside circulation pump (field
supply)
3
stop valve (field supply) 12 collector (field supply)
6
drain valve (field supply) 18 bypass valve (field supply)
T1…n room theromstat (field supply) 20 SV2: 2-way valve (field supply)
Fig.7-3 diagram of application 3
Table 7-3
FHL1 FHL2 FHLn
11
10
12
9.1
32
6
7
8
9.2
9
1.1
1.2
1.3
1.4
1.5
1
FCU1 FCU2 FCUn
M2
Mn
M1
T1
Tn
T2
12
18
M
20
10
V.2