Hitachi YUTAKI ATW-YCC-03 Installation And Operation Manual page 20

LCD REMOTE CONTROLLER
8.4.4 Common Heating/Cooling household in combination with common DHW production
This installation is suitable in case high amount of DHW is
required at a specific setting temperature.
When Cascade is generating water for DHW tank, production
of hot or chilled water for Space Heating/Cooling application is
stopped until DHW production stops.
YUTAKI
1
YUTAKI
2
YUTAKI
n
UP to 8
Example for illustrative purpose

Mainly configuration
Configuration in YUTAKI CASCADE CONTROLLER Side:
1 Circuit 1: Enabled at gradient/point/fixed temperature (thermostat option) (Direct Circuit)
2 Circuit 2: Enabled at gradient/point/fixed temperature (thermostat option) (Mixing Circuit)
3 DHW: Enabled
4 Cascade Configuration Menu (Example in case that 6 modules are connected):
Example 1
Cascade configuration menu
Status
Refrigerant cycle address
Indoor unit address
Individual DHW
Status
Type
Configuration in YUTAKI Sub Side (Each Sub it have similar configuration):
1 Central control: Cascade Mode: Enabled
2 Circuit 1:Enabled at Fixed setting temperature (without room
thermostat)
3 Circuit 2: Disabled
4 DHW: Disabled
14 PMML0581 rev.1 - 02/2023 - 1000011627
DHW
E.HEATER
TDHW
3WV DHWT
C1
BUFFER TANK
Module 1 Module 2 Module 3
Enabled Enabled Enabled
0 1
0 0
- -
Disabled Disabled Disabled
- -
In this scenario, YUTAKI CASCADE CONTROLLER manage
both DHW tank and Space Heating/Cooling household :
• C1 and C2 management is performed by means of YUTAKI
CASCADE CONTROLLER.
• C1 and C2 can have wired/wireless/none thermostats or any
combination option.
• Installer shall determine proper usage of collector systems.
ATW-YCC-03
RECEIVER
ATW- RTU-07/08
SPACE HEATING/COOLING
SPACE HEATING/COOLING
Module 4 Module 5
Enabled Enabled
2 3 4
0 0 0
- - -
Disabled Disabled
- - -
5 Additional configuration:
a. Each unit need to assign Refrigerant address
(0/1/2/3/4/5/6/7) in accordance with YUTAKI CASCADE
CONTROLLER modules configuration
b. The water pump in each Sub unit can be set to Standard
(continuous operation) or Economic mode (operation
only in case that there is operation demand from the
CASCADE CONTROLLER or if the Sub unit has its own
tank and is in demand ON conditions).
CIRCUIT 1
PC-ARFH2E
Or
ATW- RTU-07/08
CIRCUIT 2
PC-ARFH2E
Or
ATW- RTU-06/09
Module 6 Module 7
Enabled Disabled
5 6
0 0
- -
Disabled Disabled
- -
Module 8
Disabled
7
0
-
Disabled
-