11 Technical data
Installation manual
37
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620240-1 – 2020.06
11.2
Wiring diagram: Outdoor unit
The wiring diagram is delivered with the unit, located at the inside of
the service cover.
Compressor module
Translation of text on wiring diagram:
English
Translation
(1) Connection diagram
(1) Connection diagram
Compressor SWB
Compressor switch box
Outdoor
Outdoor
(2) Compressor switch box layout (2) Compressor switch box layout
Front
Front
Rear
Rear
(3) Legend
(3) Legend
*: Optional; #: Field supply
A1P
Printed circuit board (main)
A2P
Printed circuit board (noise filter)
A3P
(only for 1N~ models)
Printed circuit board (flash)
Q1DI
# Earth leakage circuit breaker
X1M
Terminal strip
(4) Notes
(4) Notes
X1M
Main terminal
Earth wiring
Field supply
1
Several wiring possibilities
Option
Wiring depending on model
Switch box
PCB
Hydro module
Translation of text on wiring diagram:
English
Translation
(1) Connection diagram
(1) Connection diagram
3 wire type SPDT
3 wire type SPDT
Booster heater power supply
Booster heater power supply
Compressor switch box
Compressor switch box
External BUH
External backup heater kit
For DHW tank option
For DHW tank option
For external BUH option
For external backup heater kit
Hydro SWB power supplied from
compressor SWB
Hydro switch box power supplied
from compressor switch box
Hydro
Hydro module
Normal kWh rate power supply
Normal kWh rate power supply
Only for normal power supply
(standard)
Only for normal power supply
(standard)
Only for preferential kWh rate
power supply (outdoor)
Only for preferential kWh rate
power supply (outdoor)
Outdoor
Outdoor
SWB1
Hydro switch box 1 (front side)
SWB2
Hydro switch box 2 (right side)
Use normal kWh rate power
supply for hydro SWB
Use normal kWh rate power
supply for hydro switch box
(2) Hydro SWB layout
(2) Hydro switch box layout
For external BUH option
For external backup heater kit
English
Translation
For internal BUH option
For models with integrated
backup heater
SWB1
Hydro switch box 1 (front side)
SWB2
Hydro switch box 2 (right side)
SWB3
Hydro switch box 3 (behind
SWB2)
(3) Notes
(3) Notes
X1M
Terminal (main)
X2M
Terminal (field wiring for AC)
X3M
Terminal (external backup heater
kit)
X4M
Terminal (booster heater power
supply)
X5M
Terminal (field wiring for DC)
X9M
Terminal (integrated backup
heater power supply)
X10M
Terminal (high voltage Smart
Grid)
Earth wiring
Field supply
1
Several wiring possibilities
Option
Wiring depending on model
Switch box
PCB
(4) 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
A14P
* PCB of the dedicated Human
Comfort Interface (BRC1HHDA
used as room thermostat)
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
Safety 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