Installation manual
2
EWYQ080~250DAYN
Packaged air-cooled water chillers
4PW35559-1D – 03.2011
Features
■
Factory mounted main switch
■
Factory mounted flow switch and water filter
■
Read out of refrigerant pressures (high and low) via controller
■
High (partial load) efficiency
■
Electronic expansion valve + sight glass with moisture indication
■
Voltage free contacts
•
general operation
•
pump contact
•
second pump contact for dual pump function
•
warning signal (normal open or normal closed
contact)
•
100% capacity signal, full capacity signal
•
operation circuit 1
•
operation circuit 2 (only for EWYQ130~250)
■
Remote inputs
•
remote on-off
•
dual setpoint
•
capacity limitation (different settings possible)
•
low noise (only for option OPIF)
•
free cooling signal
•
fan forced on signal
■
Changeable analogue inputs
•
floating setpoint (mA, V, NTC)
•
additional water temperature measurement (NTC)
■
Changeable analogue outputs
•
unit capacity (mA, V)
O
PERATION
RANGE
M
AIN
COMPONENTS
(refer to the outlook diagram supplied with
the unit)
S
ELECTION
OF
LOCATION
This is a class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to
take adequate measures.
Make sure that the unit is not accessible by the general public.
The units are designed either for roof mounting or ground level
mounting and should be installed in a location that meets the
following requirements:
1
The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibrations and noise generation.
2
The space around the unit is adequate for servicing and the
minimum space for air inlet and air outlet is available (refer to the
paragraph "Description" in the operation manual).
If several units are being installed side by side, the minimum
service space between these must be taken into account.
3
There is no danger of fire due to leakage of inflammable gas.
4
The equipment is not intended for use in a potentially explosive
atmosphere.
5
Ensure that water cannot cause any damage to the location by
adding water drains to the foundation and prevent water traps in
the construction.
6
Select the location of the unit in such a way that neither the
discharged air nor the sound generated by the unit disturb
anyone.
7
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.
8
In heavy snowfall areas, select an installation site where snow
will not affect operation of the unit.
Cooling mode
Pull down operation area
Heating mode
Continuous operation
area
AT
Ambient temperature
LWT
Leaving evaporator
water temperature
Protect the water circuit
against freezing by
heater tape (OP10) or by
filling up the system with
a glycol solution
STD
Standard unit
OPIF
Option inverter fans
OPZL
Option glycol application
for leaving evaporator
water down to –10°C
Option inverter fans
(OPIF)
OPZL
STD
AT
°
C
LWT
°
C
-10
0
20 25
-5
5
10
21
43
50
45
40
35
30
25
20
15
10
5
0
-5
-10
-15
-20
15
15
15
STD
STD
30
50
55
35
40
45
OPIF
STD
100 + 180~250
OPZL
STD
AT
°
C
LWT
°
C
-10
0
20 25
-5
5
10
21
43
9
50
45
40
35
30
25
20
15
10
5
0
-5
-10
-15
-20
15
15
15
STD
STD
30
50
55
35
40
45
STD
OPZL
STD
OPZL
STD
150
OPIF
OPIF
OPIF
1
Evaporator (in cooling
mode) or condenser (in
heating mode)
18
Digital display controller
(inside switchbox)
19
Field wiring intake
2
Condenser (in cooling
mode) or evaporator (in
heating mode)
20
Main isolator switch
21
Transport beam
3
Compressor
22
Flow switch
4
Electronic expansion
valve + sight glass with
moisture indication
23
Fan
24
Safety valve
5
Discharge stop valve
(optional)
25
High pressure sensor
26
Low pressure sensor
6
Suction stop valve
(optional)
27
High pressure switch
28
Oil sight glass
7
Liquid stop valve
(optional)
29
Water filter
30
Frame
8
Chilled water in
(Victaulic
®
coupling)
31
4-way valve
32
Liquid receiver
9
Chilled water out
(Victaulic
®
coupling)
33
Pump (optional)
34
Buffer tank (optional)
10
Water drain evaporator
35
Expansion vessel
(optional)
11
Air purge
12
Leaving water
temperature sensor (R3T)
36
Water stop valves
(optional)
13
Entering water
temperature sensor (R2T)
37
Buffer tank drain valve
(optional)
14
Ambient temperature
sensor (R1T)
38
Regulating valve
(optional)
15
Drier + charge valve
39
Water safety valve
(optional)
16
Power supply intake
17
Switchbox
40
Pressure gauge (optional)
41
Eye bolt for lifting the unit
(only for EWYQ080~210)
Required space around the unit for service and air intake
Centre of gravity
