Hitachi YUTAKI ATW-YCC-03 Installation And Operation Manual page 22

LCD REMOTE CONTROLLER
8.4.6 Common Heating/Cooling household in combination with Individual DHW production (II)
This installation is suitable in case that not such a high amount of
DHW is demanded, or more than one Sub unit is needed to heat
one single tank.
DHW production or Space Heating/Cooling production
is simultaneously. This means that YUTAKI CASCADE
CONTROLLER can operate for Space Heating/Cooling
application and each configured Sub can operate for DHW when
needed. Each Circuit 2 will continue working by using Mixing kit
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: Disabled
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
Main Module
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: Enabled (By central controller automatically)
16 PMML0581 rev.1 - 02/2023 - 1000011627
DHW
E.HEATER
DHW
3WV
TDHW
H-LINK
TWO3
C1
BUFFER TANK
Module 1 Module 2 Module 3
Enabled Enabled Enabled
0 1
0 0
- -
Enabled Enabled Disabled
Main Sub
- 1
and accumulated water into C1 Buffer tank.
In this scenario, YUTAKI CASCADE CONTROLLER manage
Space Heating/Cooling household and YUTAKI DHW Production:
• 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.
YCC YCC
ATW-YCC-03
RECEIVER
ATW- RTU-07/08
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
SPACE HEATING/COOLING
PC-ARFH2E
Or
ATW- RTU-07/08
CIRCUIT 2
SPACE HEATING/COOLING
PC-ARFH2E
Or
ATW- RTU-06/09
Module 6 Module 7 Module 8
Enabled Disabled Disabled
5 6
0 0
- -
Disabled Disabled Disabled
- -
- -
7
0
-
-
-