EDM WQL H RC 524 1604

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WQL/WQH/WQRC 524-1604
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General description
WQL/WQH/WQRC are a water to water units equipped
with Scroll compressors, optimized to work with R410A
refrigerant.
3 different versions are available:
Cooling only units WQL
Heat pump units WQH
Remote condenser units WQRC
2 different acoustic options are available:
Standard (STD): units are supplied without compressors
box
Super Low Noise (S): units are supplied with compres-
sors box and additional insulation panels on the cabinet
in order to further reduce noise impact.
WQL/WQH/WQRC units are available in totally 10 sizes,
ranging from 154 to 460 kW in cooling operation and from
170 to 508 kW in heating operation.
WQL/WQH/WQRC units are available on one compact
structural frame. Each unit is equipped with two refriger-
ant circuits and hermetic scroll compressors (tandem).
Evaporators and condensers are brazed plate heat ex-
changer type.
Heat pump units (WQH) are equipped with reversible
valve, thus allowing to reverse cycle on refrigerant side
and not on water side.
Remote condenser units (WQRC) are not equipped with
condenser heat exchangers, but equipped with stop
valves on discharge and liquid lines in order to allow con-
nection to remote condensers.
Cabinet and structure
Cabinet and structure are made of galvanized steel. All
galvanized steel components are individually painted by
a special painting process before assembling of the unit.
This painting system performs a homogeneous protection
to the corrosion. The painting is a polyester powder based
type, coloured in RAL 7040. The units are suitable for in-
door installation.
Refrigerant circuit
Refrigerant circuit is equipped with four hermetic scroll
compressors, sight glass, lter-drier and mechanical ex-
pansion valve (electronic expansion valve is available as
an option).
Heat pump units (WQH) refrigerant circuit is also provided
with 4-way reversing valve and check valves system in
order to always run liquid line in the same direction (both
in cooling and in heating mode).
Remote condenser units (WQRC) refrigerant circuit is
supplied without condenser and it is provided with liquid
receiver, stop valves both on discharge and liquid lines,
solenoid valve on liquid line.
The functional diagram of each circuit is shown in section
“Refrigerant ow diagram”.
Compressors
Compressors are hermetic scroll type tted with an elec-
tronic control device ensuring protection of compressors
against:
Overheating
Overloading
Reversal rotation
Phase loss
All compressors have direct-on-line starting and are
mounted on rubber vibration isolators in order to minimize
noise and vibration transmission.
Evaporators and condensers
Evaporator and condenser heat exchangers are brazed
stainless steel plate type. They are insulated with a 10
mm thick closed cell polyethylene foam material and pro-
vide with Victaulic connections.
Specications