– 36 –
Hydro Unit
Installation Manual
Settings by purpose
Settings when hot water supply function is
not used
• When the hot water supply function is not used, set
DIP SW12-1 on the Hydro Unit board to ON. (Refer
to page 29.)
Setting for cooling
• For Hydro Units that do not perform cooling (those
for floor heating, etc.), procure a motorized 2-way
valve (for cooling) (refer to “Control parts
specifications” on page 20 for the details.) locally and
attach it to the water pipe that is not used for cooling.
Connect the valve cables to terminals TB05 (3) and
(4) of the Hydro Unit.
22
Operation by
external input
(option)
0 = Contacts low > high
system stop. System restart
with remote controller
1 = Contacts high > low
system stop. System restart
with remote controller
2 = Contacts high > low
system stop. Contacts low >
high system restart
3 = Contacts low > high
system stop. Contacts low >
high (second time) system
restart
52
–
0~3
0
0 = Restart hot water and
heating
1 = Restart in the mode when
stopping
2 = Restart hot water
3 = Restart heating
4 = Tempo control 1; without
heater
5 = Tempo control 2; without
HP and heater
61
–
0~5
0
Changing the control of S1
(CN210)
0 = none
1 = Hot water supply control
In addition, it is enabled only
when switch 2_3 is set to
“OFF” and FC61 is set to “3”.
B6
–
0~1
0
23 Hydro Unit
Capacity Setting
0012 = P804XWH**
0015 = P1104XWH**
Factory set but function code
is needed for PCB
replacement or function code
reset procedure has been
completed.
01
–
0012 or
0015
Depends
on Hydro
Unit
24
Second Remote
controller
Target
temperature
Setting
0=Water temperature
1=Room thermo temperature
40
–
0~1
0
25
Room
Temperature
Sensor Setting
Temperature shift for heating
–
02
-10~10
-1
Temperature shift for cooling
–
03
-10~10
-1
26
Synchronization
control at low
outside
temperature
0 = HP + Boiler
1 = Boiler
2 = Backup heater
3 = Boiler (Pump P1:stop)
5B
–
0~3
3
27
P1 pump speed
control (duty of the
PWM)
0=100%, 1=90%, 2=80%
3=70%, 4=60%, 5=50%
A0
–
100%
~50%
0
Location & FC
Number
FC Description
Hydro
RC
Range
Default
After
Commissioning
Change
1
Change
2
36-EN
Summary of Contents for HFC series
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