Hitachi YUTAKI ATW-YCC-03 Installation And Operation Manual page 19

LCD REMOTE CONTROLLER
8.4.3 Individual 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
and accumulated water into C1 Buffer tank
• C1 buffer tank depicted in the picture is C1 circuit for YUTAKI
CASCADE CONTROLLER.
YUTAKI
1
YUTAKI
2
YUTAKI
n
Example for illustrative purpose

Mainly configuration
Configuration in YUTAKI CASCADE CONTROLLER Side:
1 Circuit 1: Enabled at Fixed setting temperature (Buffer tank setting temperature)
2 Circuit 2: Disabled
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: Enabled at Gradient/Point/Fixed temperature
setting (with Wireless or Wired Room thermostat as option)
4 DHW: Enabled (automatic enabled by YUTAKI CASCADE
CONTROLLER)
13 PMML0581 rev.1 - 02/2023 - 1000011627
DHW
E.HEATER
3WV DHW
TDHW
H-LINK
C1
BUFFER TANK BUFFER TANK
Module 1 Module 2 Module 3
Enabled Enabled Enabled
0 1
0 0
- -
Enabled Enabled Disabled
Main Sub
- 1
• C1 buffer tank is managed by means YUTAKI CASCADE
CONTROLLER unit without thermostat.
• Each C2 circuit of each YUTAKI Sub unit is assigned to a
specific household.
• Each C2 mixing kit of each YUTAKI Sub unit guarantees C2
water temperature at each household.
• Each C2 circuit can have a wired or Wireless thermostat
which is connected to each Sub unit.
• Each C2 circuit can have an Outdoor OTC Temperature by
Outdoor unit or Wired Sensor accessory.
YCC YCC
ATW-YCC-03
TWO2
WP2
Vmix
Vmix
WP2 TWO2
TWO3
TWO2
WP2
Vmix
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 2 - YUTAKI 1
SPACE HEATING/COOLING
PC-ARFH2E wired
to YUTAKI 1
CIRCUIT 2 - YUTAKI 2
SPACE HEATING/COOLING
PC-ARFH2E wired
to YUTAKI 2
CIRCUIT 2 - YUTAKI n
SPACE HEATING/COOLING
PC-ARFH2E wired
to YUTAKI n
Module 6 Module 7
Enabled
Disabled
5 6
0 0
- -
Disabled Disabled
- -
- -
Module 8
Disabled
7
0
-
Disabled
-
-