Hydro Unit
Installation Manual
– 31 –
Location & DN
Number
DN Description Hydro RC
Range
HWT-60
(HWT-
110,140)
Default
HWT-60
(HWT-
110,140)
After Com-
missioning
Change
1
Change
2
8 Frost Protection
Function 0 = Invalid; 1 = Valid 3A – 0~1 1
Frost Protection Setting
Temperature (°C)
3B – 10~20 °C 15
End days – 12 0~20 0
End times – 13 0~23 0
9
Back Up Heater
Control
Downtime Back Up Heater
0 = 5min; 1 = 10min;2 = 15min;
3 = 20min
33 – 0~3 1
Uptime Back Up Heater
0 = 10min; 1 = 20min;
2 = 30min; 3 = 40min
34 – 0~3 0
10 Night Setback
Change Setback Temperature 26 – 3~20 °C 5
Zone selection 0 = Zone 1 & 2;
58 – 0~1 0
1 = Zone 1 Only
Start Time (Hour) – 0E 0~23 22
End Time (Hour) – 0F 0~23 6
12
Hydro 2 Way
Valve Operation
Control
Cooling 2 Way Valve -
Operation Logic 0 = Activated
during cooling; 1 = Not
activated during cooling
3C – 0~1 0
13
Hydro 3 Way
Diverting Valve
Operation Control
3 Way Diverting Valve
Operation Logic 0 = Activated
during hot water operation;
1 = not activated during hot
water operation
54 – 0~1 0
14
2 Zone Mixing
Valve Drive Time
Specified Drive Time for Mixing
Valve (x10sec)
0C – 3~24 6
Mixing valve OFF (control
time - mins)
59 – 1~30 4
15
Boiler/Heat Pump
Synchronisation
External Boiler/Heat Pump
Synchronisation
0 = Synchronised; 1 = Not
synchronised
3E – 0~1 0
16
Maximum
Operation Time Of
Hot Water Heat
Pump
Maximum Heat Pump
Operation Time In Hot Water
Operation Priority Mode
(minutes)
7 – 1~120 30
17 Cooling Operation
0 = Cooling & Heating
Operation; 1 = Heating Only
Operation
2 – 0~1 0
18
Remote controller
Indication
24h or 12h Time Indication
0 = 24h; 1 = 12h
– 5 0~1 0
19
CDU Night Time
Low Noise
Operation
Low Noise Operation
0 = Invalid; 1 = Valid
- 9 0~1 0
Start Time (Hour) - 0A 0~23 22
End Time (Hour) - 0B 0~23 6
Mode select for silent mode
0 = mode1
1 = mode2 (HWT-140 only)
2 = Do not use
6FC - 0~2 0
20 Alarm Tone
Tone Switching 0 = OFF; 1
= ON
– 11 0~1 1
21
Second Remote
controller and
room temperature
thermostat
Choice of the initial setting
temperature
0 = The fixed temperature
by FC9D
1 = The calculated temperature
by Auto curve
B5 – 0~1 0
Fixed initial temperature setting 9D –
20~55°C
(65°C)
40
Location & DN
Number
DN Description Hydro RC
Range
HWT-60
(HWT-
110,140)
Default
HWT-60
(HWT-
110,140)
After Com-
missioning
Change
1
Change
2
22
Operation by
external input
(option)
Input signal setting when using
I/P 7, 8 (CN21) as Emergency
shutdown input (DN B6 = 0)
0 = Contacts low > high system
stop. System restart with
remote controller
1 = Contacts high > low system
stop. System restart with
remote controller
52 – 0~1 0
Input signal setting when using
I/P 5, 6 (CN21)
0 = Contacts high > low system
stop. Contacts low > high
system restart
1 = Contacts low > high system
stop. Contacts low > high
(second time) system restart
61 – 0~1 0
Changing the control of I/P 7,
8 (CN21)
Please refer to “Table2” on
page 16.
B6 – 0~4 0
23
Hydro Unit type
Setting
70: Wall mounted type 71: All
in one type
10 – 70 or 71 70
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 – 2 -10~10 -1
Temperature shift for cooling – 3 -10~10 -1
26
Synchronisation
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 = P1 pump fixed speed
1 = P1 pump variable speed
6A6 – 0~1 1
0 = 100%, 1 = 90%, 2 = 80%
3 = 70%, 4 = 60%, 5 = 50%
A0 –
100%
~50%
0
28
Restriction of
backup heater
energization
during heating
mode
Forcibly heater off
atTO≥A°C
0 = no restriction, 1 = 20 °C,
2 = 15 °C, …, 6 = -5 °C
B8 – 0~6 0
29
Interval operation
of the pump
3 min ON/10 min
OFF
Intermittent operation
atTO≥A°C(heatingmode)
0 = continuous operation
1 = 20 °C, …, 6 = -5 °C
BA – 0~6 0
intermittent operation
at TO < B °C (cooling mode)
0 = continuous operation
1 = 35 °C, …, 3 = 25 °C
BB – 0~3 0
30
Backup heater
energization
control during
defrosting
β:
0 = 0K, …, 4 = 40K
Recommendation:β=2(20K)
B9 – 0~4 0
61-EN
62-EN