11 Technical data
Installation manual
40
EWAA004~008D2 + EWYA004~008D2
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688014-1A – 2022.05
English
Translation
X9M
Internal backup heater power
supply terminal
X10M
Smart Grid terminal
Earth wiring
Field supply
1
Several wiring possibilities
Option
Wiring depending on model
Switch box
PCB
Legend
(4) Legend
*: Optional; #: Field supply
A1P
Main PCB
A2P
* ON/OFF thermostat (PC=power
circuit)
A3P
* Heat pump convector
A4P
* Digital I/O PCB
A8P
* Demand PCB
A11P
MMI (= standalone user interface
delivered as accessory) – Main
PCB
A13P
* LAN adapter
A14P
* User interface PCB
A15P
* Receiver PCB (wireless ON/OFF
thermostat)
CN* (A4P)
* Connector
DS1 (A8P)
* DIP switch
E*P (A9P)
Indication LED
F1B
# Overcurrent fuse backup heater
F2B
Overcurrent fuse booster heater
F1U, F2U (A4P)
* Fuse 5 A 250 V for digital I/O
PCB
K1A, K2A
* High voltage Smart Grid relay
K1M
Contactor backup heater
K3M
* Contactor booster heater
K*R (A4P)
Relay on PCB
M2P
# Domestic hot water pump
M2S
# 2-way valve for cooling mode
M3S
* 3-way valve for floorheating /
domestic hot water
M4S
* Valve kit
PC (A15P)
* Power circuit
PHC1 (A4P)
* Optocoupler input circuit
Q2L
* Thermal protector booster heater
Q4L
# Safety thermostat
Q*DI
# Earth leakage circuit breaker
R1H (A2P)
* Humidity sensor
R1T (A2P)
* Ambient sensor ON/OFF
thermostat
R1T (A14P)
* Ambient sensor user interface
R2T (A2P)
* External sensor (floor or ambient)
R5T
* Domestic hot water thermistor
R6T
* External indoor or outdoor
ambient thermistor
S1L
* Flow switch
English
Translation
S1S
# Preferential kWh rate power
supply contact
S2S
# Electricity meter pulse input 1
S3S
# Electricity meter pulse input 2
S4S
# Smart Grid feed-in
S6S~S9S
* Digital power limitation inputs
S10S, S11S
# Low voltage Smart Grid contact
SS1 (A4P)
* Selector switch
TR1
Power supply transformer
X4M
* Terminal strip (booster heater
power supply)
X8M
# Terminal strip (power supply at
client side)
X9M
Terminal strip (integrated backup
heater power supply)
X10M
* Terminal strip (Smart Grid power
supply)
X*, X*A, X*Y
Connector
X*M
Terminal strip
Z*C
Noise filter (ferrite core)
(5) Option PCBs
(5) Option PCBs
Alarm output
Alarm output
Changeover to ext. heat source
Changeover to external heat
source
For demand PCB option
For demand PCB option
For digital I/O PCB option
For digital I/O PCB option
Max. load
Maximum load
Min. load
Minimum load
Power limitation digital inputs: 12
V DC / 12 mA detection (voltage
supplied by PCB)
Power limitation digital inputs:
12 V DC / 12 mA detection
(voltage supplied by PCB)
Options: ext. heat source output,
alarm output
Options: external heat source
output, alarm output
Options: On/OFF output
Options: On/OFF output
Space C/H On/OFF output
Space cooling/heating On/OFF
output
SWB
Switch box
(6) Options
(6) Options
230 V AC Control Device
230 V AC control device
Continuous
Continuous current
DHW pump output
Domestic hot water pump output
Electric pulse meter input: 12 V
DC pulse detection (voltage
supplied by PCB)
Electric pulse meter input:
12 V DC pulse detection (voltage
supplied by PCB)
Ext. ambient sensor option
(indoor or outdoor)
External ambient sensor option
(indoor or outdoor)
For cooling mode
For cooling mode
For HP tariff
For heat pump tariff
For HV smartgrid
For high voltage Smart Grid
For LV smartgrid
For low voltage Smart Grid
For safety thermostat
For safety thermostat
For smartgrid
For Smart Grid
For ***
For ***
Inrush
Inrush current
NO valve
Normal open valve
Only for LAN adapter
Only for LAN adapter
Optional for ***
Optional for ***
