Installation manual
8
EWAQ+EWYQ005~007ACV3P
Packaged air-cooled water chillers and
packaged reversible air to water heat pumps
4PW33165-1D
Piping insulation
The outdoor and indoor part of the water circuit must be insulated to
prevent condensation during cooling operation and reduction of the
cooling and heating capacity.
Field wiring
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit (inside the
unit top cover). The abbreviations used are listed below.
Accessible switch box
A1P ........................Main PCB
A2P ........................Digital controller PCB (indoor)
E5H ........................Heater tape (models with heater tape only
(option OP10))
E6H ........................Field supplied heater tape (models with heater
tape only (option OP10))
FU1 ........................Fuse 3.15 A T 250 V
FU2 ........................Fuse 5 A 250 V (models with heater tape only
(option OP10))
K1M........................Relay (models with heater tape only (option
OP10))
M1P........................Pump
Q1DI.......................Earth leakage circuit breaker
R1T ........................Outlet water heat exchanger thermistor
R3T ........................Refrigerant liquid side thermistor
R4T ........................Inlet water thermistor
S1L.........................Flow switch
S1M........................Main switch
SS2 ........................Dipswitch
TR1 ........................Transformer 24 V for PCB
X10A, X15A............Connector
X17A~X20A............Connector
X1A, X2A................Connector
X4A, X5A................Connector
X7A, X8A................Connector
X3M........................Terminal strip
Non-accessible switch box
AC1, AC2............... Connector
E1, E2.................... Connector
FU1........................ Fuse 30 A 250 V
FU2,FU3 ................ Fuse 3.15 A 250 V
HR1, HR2 .............. Connector
L............................. Live
L1R ........................ Reactor
LED A .................... Pilot lamp
M1C ....................... Compressor motor
M1F ....................... Fan motor
MRC/W .................. Magnetic relay
MRM10,MRM20 .... Magnetic relay
N ............................ Neutral
PCB1,2 .................. Printed circuit board
PM1 ....................... Power module
Q1L........................ Overload protector
R1T~R3T ............... Thermistor
S2~S102................ Connector
SA2........................ Surge arrester
SHEET METAL ...... Terminal strip fixed plate
SW1....................... Forced operation ON/OFF switch
SW4....................... Local setting switch
U, V, W, X11A......... Connector
V2,V3,V5,V6,V11... Varistor
X1M, X2M.............. Terminal strip
Y1E........................ Electronic expansion valve coil
Y1R........................ Reversing solenoid valve coil
Z1C~Z4C ............... Ferrite core
Notes
............... Field wiring
................. Terminal strip
......................... Connector
......................... Terminal
.......................... Protective earth
(1) This wiring diagram only applies to the outdoor unit
(4) Do not operate the unit by short-circuiting protection devices Q1L,
S1L
Field wiring guidelines
■
The field wiring on the unit is to be made on the terminal block
inside the switch box. To gain access to the terminal block,
remove the unit top cover and switch box service panel, see
"Opening of the unit" on page 3
■
Cable tie mountings are provided at the side of switch box. Fix
all cables using cable ties to provide strain relief.
■
The back cover of the unit is equipped with 2 holes to guide the
digital controller cable (smallest hole) and the power supply
cable (largest hole) wiring into the unit. Refer to
Make sure to use double insulated cables or to put cables
outside the unit into a protective pipe in order to avoid damage
to cables by friction on the basis of the unit.
■
The power supply cable must be selected in accordance with
local and national regulations.
■
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 supply. Never use a
power supply shared by another appliance.
■
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage circuit breaker.
This unit uses an inverter, which means that an earth
leakage circuit breaker capable of handling high
harmonics needs to be used in order to prevent
malfunctioning of the earth leakage circuit breaker
itself.
■
Use an all-pole disconnection type breaker with a
contact separation of at least 3 mm in-between all
poles.
BLK
: Black
GRY
: Grey
VIO
: Violet
BLU
: Blue
PNK
: Pink
WHT
: White
BRN
: Brown
ORG
: Orange
YLW
: Yellow
GRN
: Green
RED
: Red
When fixing cables inside the unit, make sure the cables
do not touch the pump or refrigerant piping.
