Mitsubishi Electric PUHZ-W50VHA Technical Manual page 93

(2)-2. Domestic Hot Water + space heating by under fl oor heating
with split outdoor unit+HYDROBOX + IF
*variable capacity request signals for Heat Pump is calculated by local system controller.
1) System outline
Split
O/U
Refrigerant pipe
temp.themistor
(Liquid side)
2) Wiring / Switch setting
Flow temp.thermistor
Refrigerant pipe (liquid) temp.thermistor
PAR-21MAA
Remote Controller
(for servicing purpose
: not always necessary)
At site
Forced comp.off
Flow sensor →
Cooling/Heating X11 →
Step1 X12
→
Step4 X13
→
Step7 X14
→
Auto X15
→
Flow temp.thermistor
SW1
ON
1 2 3 4 5 6 7
Fixed OFF
System select
OFF/OFF/OFF→7steps by remote switch
Fixed operation mode
ON/ON→depond on external input
HYDRO BOX(locally supplied)
IF
(PCB)
Refrigerant pipe
*
(Gas)
Refrigerant pipe
(Liquid)
*Flow temp.
thermistor
(outlet side)
IF board
TB61
1
2
3
4
5
6
1
2
1
TB62 OFF/ON
2
3
4
5
6
TB142
2 4 6 8
10 12 14
1 3 5 7 9
11 13
(External Input)
I/F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X11 X12 X13 X14 X15
TB142
Cooling/ Capacity
Heating Steps
Set temperature
(user interface)
SW2
ON
1 2 3 4 5 6 7
8
LEV self control: ON
(need to set to ON for ATW
application)
Fixed set temp.(not in use in this case)
X11
*system
controller
*
* pump
Valve
*Flow sensor
(to prevent
pipes from
freezing)
SW1 SW2 SW3
1 1 1
8 8 8
OFF/ON OFF/ON OFF/ON
SW6
CNS2
CNX1 CNX2 CNX3 CNX4 CNX5 CNX6 CNX7
1 3 1 3 1 3 1 3 1 3 1 3 1 3
(External Output)
X1 X2 X3 X4 X5 X6 X7
IF 1 3 1 3 1 3 1 3 1 3 1 3 1 3
CNX1~X7
At site
System controller
Pump Valve Auxiliary heater
(ON/OFF) (ON/OFF) (ON/OFF)
SW3
ON
8 1 2 3 4 5 6 7
Fixed OFF
LED display setting
(refer to page34)
IF
Fixed OFF
93
* Under Floor Heating
*Auxiliary
heater
* locally supplied
1 2
TO OUTDOOR UNIT
S1 S2 S3
TB6
L N
To metal chassis
SW6
ON
1 2
8
Fixed OFF
Analog input setting
(not in use in this case)