Hitachi RWM-(H)FSN3E Technical Catalogue page 150

11 Installation
configurations

Installation example 3
Two space heating applications (High & Low water temperature): When the split air to water heat pump is connected to two
different heating circuits, circuit 1 will be direct (high temperature for radiator operation) and circuit 2 will be a mixing circuit
in order to have a second temperature control using mixing valve (low temperature for floor heating operation). Optional
Room Thermostat
R410a

Installation example 4
Two space heating applications (High & Low water temperature) and Domestic Hot Water Tank: Two space heating appli-
cations with optional Room Thermostat and Domestic Hot Water Tank heated by Heat Pump.
6
2
3
R410a
150
TCGB0070 rev.3 - 04/2012
High Temperature (60ºC)
Two2
WP2
Vmix
H20
High Temperature
(60ºC)
T
DHWT
C
4
B
EH DWHT
5
D
E
7
F
H20
3-WAY VALVE
10
6 8
A
Item Description
1 Outdoor unit
Low Temperature (35ºC)
2 Indoor unit
3 Heat exchanger
4 Electrical heater
5 Water pump (primary)
6 Valves (factory supplied)
Second temperature kit (acces-
9
sory)
10 Motorized valve (field supplied)
2nd Temperature sensor signal
D
(accessory)
E Secondary water pump signal
F Mixing valve signal
K Optional signal
Item Description
Low Temperature
1 Outdoor unit
(35ºC)
2 Indoor unit
3 Heat exchanger
4 Electrical heater
5 Water pump (primary)
6 Valves (factory supplied)
Domestic Hot Water Tank (DHWT)
7
(accessory)
8 3-way valve for DHWT (accessory)
Second temperature kit (acces-
9 9
Two2
sory)
WP2
10 Motorized valve (field supplied)
Vmix
A 3-way valve output signal
B DHWT electrical heater signal
C DHWT sensor signal (accessory)
2nd Temperature sensor signal
D
(accessory)
E Secondary water pump signal
F Mixing valve signal
K Optional signal