Hitachi YUTAKI S80 Series Technical Catalogue page 143

11. Installation configuration

Boiler complement (Installation example 6)
Installation with alternating space heating and Boiler combination + optional Domestic Hot Water Tank: Space heating
application with optional Room Thermostat heated alternating Heat Pump and boiler combination. Optional Domestic Hot
Water Tank is heated by Heat Pump. The LCD is integrated with the DHW Tank or supplied as accessory if indoor unit is
alone. The LCD is integrated with the DHW Tank or supplied as necessary accessory if indoor unit is alone.
N O T E
• When YUTAKI S80 is working in Alternating Bi-valent system (with boiler), a hydraulic separator or buffer tank
has to be used to ensure proper hydraulic balancing. Use the ATW-HSK-01 accessory if needed. Additional
Water pump (WP3) and water sensor (Two3) (ATW-WTS-02Y accessory) are also necessary.
• When YUTAKI S80 is working in Alternating Bi-valent system (with boiler) install 2 water check valves (non-
return) at the water inlet of the indoor unit and boiler. Use the ATW-WCV-01 accessory if needed.
1
Item Description
1 Outdoor unit
2 Indoor unit
3 R134a compressor
4 Water pump
5 3-way valve
6 T-branch
7 Shut-off valves (field supplied)
8 Domestic hot water tank
Security valve
9
(DHWT-SWG-01 accessory)
DHWT heater
10
(integrated with DHWT)
143
TCGB0075 rev.0 - 11/2012
8
10
11
DHW Tank
5
6
4
3
Item Description
LCD controller
11
(integrated with DHWT)
Second temperature kit
12
(ATW-2KT-01 accessory)
13 Motorized valve (field supplied)
Aquastat
14
(ATW-AQT-01 accessory)
15 Boiler (field supplied)
Water check valve
16
(ATW-WCV-01 accessory)
Hydraulic separator
17
(ATW-HSK-01 accessory)
High Temperature (80ºC)
13
9
F
7
G
Domestic
Water
(return)
2
16
Item Description
2nd Water Temperature sensor
A
(ATW-WTS-02 accessory)
B Secondary water pump
C Mixing valve
D Hydraulic separator
E Shut-off valve
Universal water sensor (Two3)
F
(ATW-WTS-02Y accessory)
Water pump 3 (WP3)
G
(field supplied)
Low Temperature (35ºC)
14
A
B
C
D
12
Boiler
E
17
Boiler
Signal
15
11