43
internal and external hydraulic circuit nrB w2-w4 (with douBle PuMP + storaGe tanK + VariaBle sPeed inVerter)
1
3
2
2
5
4
6
7
7
8
8
9
10
11
3
10
612
13
14
10
15
16
PT
PT
17
17
9
9
18
18
PTDPTD
M
19
WARNING!
Make sure the system
has an adequate number
of terminals with 3-way
valves, to guarantee at
least the minimum water
ow rate.
COMPONENTS PROVIDED AS STANDARD
internal and external hydraulic circuit nrB w2-w4 (WITH DOUBLE APUMP + STORAGE TANK +
VARIABLE SPEED INVERTER
Do not ll up the hydraulic system by glycol near the suction of the pump.
High concentration of glycol could stuck the pump. Do not use the pump to
mix water and glycol
COMPONENTS PROVIDED AS STANDARD
1 Plate heat exchanger
2 Water temperature sensors
3 Antifreeze electric heater (standard in the heat exchanger and storage tank)
4 Di erential pressure transducer
5 Water lter
6 Air vent valve
7 One way valve
8 Pump
9 Cut-o valve
10 Drain valve
11 System bu er tank
12 Expansion Tank
13 Safety valve
14 Pressure gauges
15 Flow switch
16 Motorized by-pass valve
17 Pressure transducer
HYDRAULIC COMPONENTS RECOMMENDED EXTERNAL TO UNIT
(RESPONSIBILITY OF THE INSTALLER)
18 Anti-vibration joints
19 Automatic Filling Valve
9 Cut-o valve