Installation manual
6
EWYQ080~250DAYN
Packaged air-cooled water chillers
4PW35559-1D – 03.2011
Example 1
in case of EWYQ080~210 unit
Total system water volume=300 l
Highest point of circuit above the EWYQ unit=5 m
Pg=(5/10+0.3)=0.8 bar
Pr=±2.1 bar
in case of 250 unit
Total system water volume=600 l
Highest point of circuit above the EWYQ unit=5 m
Pg=(5/10+0.3)=0.8 bar
Pr=±1.9 bar
Example 2
in case of EWYQ080~210 unit
Total system water volume=600 l
Highest point of circuit above the EWYQ unit=5 m
Pg=(5/10+0.3)=0.8 bar
Pr=±1.6 bar
in case of 250 unit
Total system water volume=1000 l
Highest point of circuit above the EWYQ unit=5 m
Pg=(5/10+0.3)=0.8 bar
Pr=±1.5 bar
P
IPING
INSULATION
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation and reduction of the cooling capacity.
Protect the water piping against water freezing during winter period
(e.g. by using an external field supplied heater tape or glycol
solution).
F
IELD
WIRING
Parts table
Refer to the additional manual supplied with the unit for:
■
Complete parts table
■
Notes to go through
A02P........... ** ........PCB communication (only for option EKACPG)
A4P.........................PCB wired remote controller
A5P............. ** ........PCB wired remote controller (only for option
EKRUPG)
E5H ............ *..........Field heater
F1~F3......... # .........Main fuses
F4,F5 .......... # .........Fuse for heaters
H1P ............ *..........Indication lamp: alarm signal (default NO)
H2P~H6P ... *..........Indication lamp for changeable digital outputs
H11P,H12P... *..........Indication lamp for operation compressor C11M,
C12M
H21P,H22P... *..........Indication lamp for operation compressor C21M,
C22M (only for EWYQ130~250)
K1P............. ## .......Pump contactor (only for options OPSP, OPHP,
OPSC, OPTP and OPTC)
K1S............. *..........Overcurrent relay pump (not for options OPSC,
OPTC, OPSP, OPTP and OPHP)
K2P............. ** ........Pump contactor (only for options OPTP and
OPTC)
M1P ............ *..........Pump motor 1 (only for options OPSC, OPTC,
OPSP, OPTP and OPHP)
M2P ............ *..........Pump motor 2 (only for options OPTP and
OPTC)
R8T............. *..........Temperature sensor for changeable analogue
input
S1M ........................Main isolator switch
S1S~S5S.... *..........Switch for changeable digital input
S2M ............ # .........Heater tape isolator switch
V2C ............ ** ........Ferrite core (only for option EKACPG)
- - -..........................Field wiring
➀
............................Several wiring possibillities
.........................DIP switch (set on left position)
NOTE
In this example it is allowed to keep the pre-pressure
factory setting from 1.5 bar. In this case the initial
water-pressure must be ±2.2 bar
NOTE
In this example it is not allowed to keep the pre-
pressure factory setting of 1.5 bar.
NOTE
■
In case a factory mounted heater tape (OP10)
is installed:
Two terminals are foreseen in the switchbox on
which an additional field supplied heater tape can
be connected for preventing the water piping from
freezing during the cold weather months. Refer to
the wiring diagram supplied with the unit.
■
In case no heater tape is installed:
The pump can be activated in low ambient
conditions (refer to
"Customization in the service
menu" on page 9
).
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.
NOTE
Verify on the wiring diagram all electrical actions
mentioned below, in order to understand the operation
of the unit more deeply.
Not included with standard unit
Not possible as option
Possible as option
Obligatory
#
##
Not obligatory
*
**
