Fläkt Woods
8643 GB 2012.11
9
We reserve the right to alter specifications
Installation and Maintenance Instructions
EQKA Cooling unit
Description of the Functions, example with two compressors
Operation
The cooling unit is started and stopped by an external
control signal of 0–10 V.
The step-by-step opening and closing operation is
described on page 7.
Note:
The water-cooled condenser is mounted on circuit
no. 3 or 4 on the sizes that have 3 or 4 compressors.
Description of the Functions
Designation
EV:1, EV:2, EV:3
= Evaporator
FT:1, FT:2, FT3
= Drying filter
GP1:1, GP1:2, GP1:3
= Protective pressure switch – high pressure
GP1a:1
= In-service pressure switch – high pressure
GP2:1, GP2:2, GP2:3
= Protective pressure switch – low pressure
KD:1, KD:2, KD:3
= Condenser
KD-W
= Water-cooled condenser (optional)
KM:1, KM:2, KM:3
= Compressor
MU1:1, MU1:2, MU1:3 = Measurement tapping – high pressure
MU2:1, MU2:2, MU2:3 = Measurement tapping – low pressure
SG:1, SG:2, SG:3
= Sight glass
SÄV
= Safety valve
VS:1, VS:2, VS:3
= Expansion valve
VW
= Pressure-controlled water-saving valve
(optional)
Fan section
Design pressure: 29.3 bar (e) = effective
Test pressure: 33.0 bar (e) effective
Water-cooled
condenser
Direction
of flow
Fan section
VW
KD-W
Cold
water
inlet
1) Optional: code suffix –d
Water-cooled condenser
Refrigeration flow chart for unit sizes
with 2 compressors
These units with 3 compressors have a
third circuit which is similar to circuit no 2.
