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English
TR1
X*M
X*Y
PCB3
M2S
# Shut-off valve
*:
Optional
#:
Field supply
Control box
English
(1) Connection diagram
BUH option
Control box
Hydro switch box
NO valve
Only for ext. sensor (floor or
ambient)
Only for wired On/OFF
thermostat
Only for wireless On/OFF
thermostat
Option box
Preferential kWh rate power
supply contact: 5 V DC detection
(voltage supplied by PCB)
(2) Notes
X1M
15
1
(3) Control switch box layout
(4) Legend
A3P
*
A4P
*
A5P
A7P
*
M2S
# Shut-off valve
M4S
*
Q*DI
# Earth leakage circuit breaker
R1T (A3P)
*
R2T (A3P)
*
S1S
# Preferential kWh rate power
X*M/K1
X*Y
K1A
K2A
*:
Optional
#:
Field supply
EWAQ+EWYQ004+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
Translation
Power supply transformer
Terminal strip
Connector
Service PCB
Translation
(1) Connection diagram
Backup heater option
Control box
Hydro switch box
Normal open valve
Only for external sensor (floor or
ambient)
Only for wired On/OFF
thermostat
Only for wireless On/OFF
thermostat
Option box
Preferential kWh rate power
supply contact: 5 V DC detection
(voltage supplied by PCB)
(2) Notes
Main terminal
Earth wiring
Wire number 15
Field supply
Several wiring possibilities
Option
Wiring depending on model
Switch box
PCB
(3) Control switch box layout
(4) Legend
On/OFF thermostat (PC=power
circuit)
Extension PCB (control, optional)
User interface PCB
Receiver PCB (wireless On/OFF
thermostat)
Valve kit
Ambient sensor On/OFF
thermostat
External sensor (floor or ambient)
supply contact
Terminal strip
Connector
Relay for heating
Relay for cooling
Control box option: backup heater
English
(1) Connection diagram
BUH option
Control box
Only for ***
(2) Notes
15
1
(3) BUH kit switch box
(4) Legend
F1B
K1R
K2R
K1M
K2M
K5M
Q*DI
# Earth leakage circuit breaker
Q1L
R2T
X*M
X*Y
*:
Optional
#:
Field supply
Control box option: option box
English
(1) Connection diagram
Alarm output
Control box
Electric pulse meter inputs: 5 V
DC pulse detection (voltage
supplied by PCB)
Ext. heat source
External indoor ambient sensor
option
Indoor
Max. load
Max. voltage
Min. load
Option box
Power limitation digital inputs: 5
V DC detection (voltage supplied
by PCB)
Space C/H On/OFF output
(2) Legend
A4P
14 Technical data
Translation
(1) Connection diagram
Backup heater option
Control box
Only for ***
(2) Notes
Earth wiring
Wire number 15
Field supply
Several wiring possibilities
Option
Wiring depending on model
Switch box
PCB
(3) BUH kit switch box
(4) Legend
Overcurrent fuse backup heater
Relay backup heater (step 1)
Relay backup heater (step 2)
(only for *9W)
Contactor backup heater (step 1)
Contactor backup heater (step 2)
(only for *9W)
Safety contactor backup heater
(only for *9W)
Thermal protector backup heater
Outlet backup heater thermistor
Thermistor strip
Connector
Translation
(1) Connection diagram
Alarm output
Control box
Electric pulse meter inputs:
5 V DC pulse detection (voltage
supplied by PCB)
External heat source
External indoor ambient sensor
option
Indoor
Maximum load
Maximum voltage
Minimum load
Option box
Power limitation digital inputs:
5 V DC detection (voltage
supplied by PCB)
Space cooling/heating On/OFF
output
(2) Legend
Extension PCB (control, optional)
Installer reference guide
79
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