Hitachi YUTAKI Series - Page 123

121
Systemcongurations
SMGB0066 rev.0 - 12/2009
Controller pack
Service Manual
4
  
Return sensor
Supply sensor
Outdoor sensor
Heat pump
control output
Heat pump fault
Tariff/ Timer input
DHW Sensor
RF Receiver
-
+
T RET
4-20mA
T SUP
T DHW
T EXT
12
11
10
9
8
7
6
5
4
3
2
1
15
14
13
Boiler on/off Boiler primary pump DHW Valve/Pump Secondary pump Heat pump remote on/off
ON/ OFF
12
11
10
9
8
7
6
5
4
3
2
1
N
N
L
15
14
13
¡
Thissystemisrecommendedforretrot(upgrade)applicationswhereanexistinggas/oilboilerwillberetainedtoprovidethe
full heating requirements on the coldest days of the year.
• DirectOTCControlledHeatingLoop-Mixingcircuit
• Sequencecontrolofboilerandheatpump
 
• SetinstallerparameterCONFtovalue4
• SetP4(OTCheatingcurve)accordingtobuilding/system
 
•
Boiler control parameters
•
Mixing valve control parameters
•
Minimum and maximum supply temperatures
•
Room temperature compensation
•
Frost Protection parameters
•
Summer switch-off setting
•
Tariff/Timerinputconguration
•
To select alternative operation (heat pump or boiler can operate
separately,butnotatthesametime)
- Heat Pump
- Boiler
- Secondary pump
- Mixing valve
- Optional boiler primary pump
  
Mixed supply
sensor
Return sensor
Supply sensor
Outdoor sensor
Heat pump control
output
Heat pump fault
Tariff/ Timer input
RF Receiver
-
+
T MIX
T RET
4-20mA
T SUP
T EXT
12
11
10
9
8
7
6
5
4
3
2
1
15
14
13
Boiler on/off Secondary pump Heat pump remote on/off
ON/ OFF
Mixing valve close Mixing valve open Boiler primary pump
12
11
10
9
8
7
6
5
4
3
2
1
N
N
L
15
14
13