Operating Instructions and Installation Instructions

Installation and operation manual
5
EUWA(*)5~24KBZW1
Packaged air-cooled water chillers
4PW61653-1 – 07.2010
7 Fan motor thermal protector (Q11F, Q12F, Q21F, Q22F)
The fan motors are equipped with a thermal protector. The
protectors are activated when the temperature becomes too
high. When temperature returns to normal, the protector resets
automatically.
8 Overcurrent relay for compressor (K4S, K5S)
The overcurrent relay protects the compressor motor in case of
overload, phase failure or too low voltage. The relay is factory
set and may not be adjusted. When activated, the overcurrent
relay has to be reset in the switch box and the controller needs
to be reset manually.
9 Overcurrent relay for pump (K6S)
The overcurrent relay protects the pump motor in case of
overload, phase failure or too low voltage. The relay is factory
set and may not be adjusted. When activated, the overcurrent
relay has to be reset in the switch box and the controller needs
to be reset manually.
10 Fuse for control circuit (F1U)
The fuse for control circuit protects cables of control circuit and
controller components in case of short circuit.
11 Fuse for control circuit (F4)
The fuse for control circuit protects cables of control circuit and
heater(s) for freeze protection in case of short circuit.
12 Fuse for digital controller (F3U)
The fuse protects cables of digital controller and digital controller
in case of short circuit.
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below.
A1P ........................PCB: controller PCB
A2P ........................PCB: I/O PCB (input/output)
A3P ............. ** .......PCB: Address card for BMS
A5P ............. ** .......Softstarter for circuit 1
A7P ............. ** .......PCB: remote user interface
A71P ......................PCB: power supply card
A72P ......................PCB: remote user interface
C1,C2,C3,C4..........Capacitors for fanmotors
E1H,E2H ................Crankcase heater circuit 1, circuit 2
E3H,E4H ..... **.......Evaporator heatertape
E5H ...............* .......Field heater
E6H ............. **.......Buffertank heater
F1,F2,F3.......# .......Main fuses for the unit
F4 ...........................Fuse for I/O PCB and evaporator heatertape
F5 ...............## .......Surge proof fuse (optional for BMS)
F6 ...............(#) .......Fuse for pumpmotor
F7,F8......................Fuse for fan motor circuit 1, circuit 2
F1U ........................Fuse for I/O PCB
F3U ........................Fuse controller PCB
H3P ...............* .......Indication lamp alarm
H4P ...............* .......Indication lamp operation compressor 1
H5P ...............* .......Indication lamp operation compressor 2
H6P ...............* .......Indication lamp general operation
K1M,K2M ...............Compressor contactor circuit 1, circuit 2
K4S,K5S.................Overcurrent relay circuit 1, circuit 2
K6S ............ (*) .......Overcurrent relay pump
K1P ............ (*) .......Pumpcontactor
M1C,M2C ...............Compressor motor circuit 1, circuit 2
M11F,M12F ............Fanmotors circuit 1
M21F,M22F ............Fanmotors circuit 2
M1P........................Pumpmotor (only P and B models)
PE ..........................Main earth terminal
Q1D,Q2D................Discharge thermal protector circuit 1, circuit 2
Q11F,Q12F ............ Thermal protector fan circuit 1
Q21F,Q22F ............ Thermal protector fan circuit 2
R3T........................ Evaporator inlet water temperature sensor
R4T........................ Evaporator outlet water temperature sensor
R6T........................ Ambient temperature sensor
R7T,R8T ................ Coil temperature sensor for circuit 1, circuit 2
S1HP,S2HP ........... High pressure switch circuit 1, circuit 2
S4LP,S5LP............. Low pressure switch circuit 1, circuit 2
S7S............... * ...... Switch for remote cooling/heating selection or
dual setpoint
S9S............... * ...... Switch for remote start/stop or dual setpoint
S10L ...................... Flowswitch
S12M ..................... Main isolator switch
S21P...................... Switch for pump: manual/auto
TR1........................ Transfo 230 V
➞ 24 V for supply of controller
PCB
TR2........................ Transfo 230 V
➞ 24 V for supply of I/O PCB
(A2P)
X1~82A/B/M .......... Connectors
Y1R,Y2R................ Reverse valve circuit 1, circuit 2
INSTALLING THE UNIT
SELECTION OF LOCATION
The unit should be installed in a location that meets the following
requirements:
1 The foundation is to be in such way that it causes no vibrations
or noise when the unit is in operation.
2 The space around the unit is adequate for servicing and the
minimum space for air inlet and air outlet is available.
If several units are being installed side by side, the minimum
service space between them must be taken into account.
3 There is no danger of fire due to leakage of inflammable gas.
4 Ensure that water cannot cause any damage to the location by
adding water drains to the foundation and prevent water traps in
the construction.
5 Select the location of the unit in such a way that neither the
discharged air nor the sound generated by the unit disturb
anyone.
6 Make sure that the air inlet and outlet of the unit are not
positioned towards the main wind direction. Frontal wind will
disturb the operation of the unit. If necessary, use a windscreen
to block the wind.
7 In heavy snowfall areas, select an installation site where snow
will not affect operation of the unit.
The equipment is not intended for use in a potentially explosive
atmosphere.
Not included with standard unit
Not possible as option Possible as option
Obligatory # ##
Not obligatory * **
( ) Applicable for unit without integrated pump
4PW61653-1_digital_EN.book Page 5 Thursday, August 26, 2010 1:49 PM