Installation and operation manual
10
EWWD440~850AAYNNO**
Packaged water-cooled water chillers
4PW25558-1B
Power supply work
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below:
20R3, 20R4 ............Oil return solenoid valve circuit 1, circuit 2
20R8.......................Dryer line solenoid valve
20R1, 20R2 ............Forcely closed solenoid valve circuit 1, circuit 2
20R5, 20R6 ............Equalizing oil level solenoid valve circuit 1,
circuit 2
20R7.......................Float chamber gas purging solenoid valve
20R9.......................Ejecter solenoid valve
26WE .....................Chilled water overcooling sensor
2-88X......................Auxiliary relay run/stop monitor
42-1, 42-2...............Deltacontactor for circuit 1, circuit 2
49C1, 49C2 ............Thermal protector compressor motor circuit 1,
circuit 2
51C1, 51C2 ............Overcurrent relay for circuit 1, circuit 2
52-1, 52-2...............Linecontactor for circuit 1, circuit 2
52X-1, 52X-2 ..........Auxiliary relay for circuit 1, circuit 2
5X-1, 5X-2 ..............Compressor circuit error relay for circuit 1,
circuit 2
5X-3........................Common error relay
6-1, 6-2...................Starcontactor for circuit 1, circuit 2
63CH-1~4...............High discharge pressure sensor
63WEL ...................Chilled water interruption sensor
88CH ......................High discharge pressure relay
88CHX....................High discharge pressure auxiliary relay
88WCX...................condenser water pump run/stop relay
88WE .....................Chilled water overcooling relay
88WEX ...................Chilled water pump run/stop relay
AXP1, AXP2... # .....Pumpinterlock
BS ..........................PCB-controller
BS1 ........................Local stop push button
BS2 ........................Local run push button
CH1, CH2...............Oil heater for circuit 1, circuit 2
CT1, CT2................Current transfo
CT-T1, CT-T2 ..........Current transducer 5 A/5 V; 24 V DC
F11U~F13U.... # .....Main fuses
F21U~F23U.... # .....Main fuses
F10S, F11S ............Circuit breakers with fuses for circuit 1, circuit 2
GL1 ........................Indication lamp: unit stop
GP ..........................Display
H1P, H2P ........ *......Indication lamp: run/stop remote display
H3P ................ *......Indication lamp: common error remote display
H4P, H5P ........ *......Indication lamp: compressor error 1, 2 remote
display
H6P.................* ..... Indication lamp: condenser water pump run/stop
H7P.................* ..... Indication lamp: chiller water pump run/stop
HF1-2..................... Fuse for primary of TR1
HF3.1, 3.2.............. Fuse for reverse phase protector
KP1, KP2 ............... Compressor slide valve position sensor for circuit
1, circuit 2
M1C, M2C ............. Compressor motors circuit 1, circuit 2
MCCB1 .................. Automate fuse for secundary of TR1
NF1........................ EMC-filter for power supply PCB
NF2~NF4 ............... Ferrite
ÖL.......................... Indication lamp: error
PBS ....................... Common error reset push button
PE.......................... Main earth terminal
R2-1, R2-2 ............. Auxiliary relay: error compressor-motor overload-
phase sequence
RL1 ........................ Indication lamp: unit running
RL2, RL3 ............... Indication lamp: compressor running for circuit 1,
circuit 2
RL4 ........................ Indication lamp: remote operation
RPP.1, RPP.2 ......... Reverse phase protector for circuit 1, circuit 2
S5E........................ Emergency stop
S6S.................* ..... Switch: remote start/stop
S10S...............* ..... Switch: demand control ON/OFF
S12S, S14S ....* ..... Push button: remote run, remote stop
S13S...............# .... Main isolator switch
Sen H..................... Discharge pressure sensor
Sen L ..................... Suction pressure sensor
T2 .......................... Time relay; time delay / 0.5 s
Th1,
Th2 ................ Compressor discharge gas temperature for
circuit 1, circuit 2
Th3 ........................ Discharge gas temperature sensor
Th4 ........................ Chilled water inlet temperature sensor
Th5 ........................ Chilled water outlet temperature sensor
Th6 ........................ Condenser water inlet temperature sensor
Th7 ........................ Condenser water outlet temperature sensor
TR1........................ Transfo control circuit
WL ......................... Indication lamp: power supply
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
The field wiring must be carried out in accordance with the
wiring diagram supplied with the unit and the instructions
given below.
Be sure to use a dedicated power circuit. Never use a
power supply shared by another appliance.
Not included with standard unit
Not possible as option
Obligatory
#
Not obligatory
*