EDM WQL H RC

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WQL-WQH-WQRC 20-190
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Specifications
General
WQL/WQH/WQRC are new 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 with compressors box to reduce
noise emissions
Super Low Noise (S) : units are supplied with compressors box and
additional insulation panels on the cabinet in order to furtherly reduce
noise impact
WQL/WQH/WQRC units are available in totally 14 sizes (20, 25, 30, 35, 40,
45, 50, 60, 75, 90, 120, 150, 170, 190), ranging from 20 to 190 kW in
cooling operation and from 25 to 210 kW in heating operation.
WQL/WQH/WQRC units are available on two different structural frames
(F1 for 20-45 sizes, F2 for 50-190 sizes). Each unit is equipped with single
refrigerant circuit, single hermetic scroll compressor for F1 sizes, and two
hermetic scroll compressors (tandem) for F2 sizes.
Evaporators and condensers are brazed plate heat exchanger 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 connection 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
assemblying of the unit. This painting system performs a homogeneous
protection to the corrosion. The painting is a polyester powder based type,
coloured in RAL 9001. The units are suitable for indoor installation.
Refrigerant circuit
Refrigerant circuit is equipped with one or two hermetic scroll compressors
(depending on the frame), sight glass, filter-drier and mechanical expansion
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 flow
diagram".
Compressors
Compressors are hermetic scroll type fitted with an electronic 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 provide with Victaulic connections.
Electrical board
Electric equipment is built in compliance with CE standards. Easy accessible
in front of the unit - through an access panel fixed with screws - the equipment
is complete with :
Door lock main isolating switch
Compressor contactors and fuses
Compressor overload protection (optional only on F2 units)
Automatic circuit breaker switches (Standard on F1 units, optional on F2
units)
Phase sequence control
Clamps for remote start/stop switch
Clamps for remote summer/winter switch
Clamps for external flow switches (both exchangers)
Clamps for remote double set-point
Clamps for external interlock
Clamps for remote general alarm
Connection clamps to remote keyboard (optional)
Clamps for evaporator/condenser pump relay control (optional)
Clamps for boiler relay control (optional)
Clamps for dynamic set-point compensation (4-20 mA, 0-1 V, 0-5 V,
0-10 V)
Clamps for DHW 3-way valve (accessory)
Clamps for outdoor air temperature probe (accessory)
Electronic control SBW655
Soft-starter (optional)
Power factor correction capacitors (optional)
0-10 V clamps for condensing control (optional)
Control
A new optimized control is supplied on all the units with a simple user
interface (possibility to customize keys functions and to set menus visibility).
In addition to standard features as water temperature control (with possibility
to choose LWT/EWT probe), the control can also manage following functions :
DHW control with anti-legionella function daily and weekly activated
Dynamic set point (4-20 mA, 0-1V, 0-5V, 0-10V)
Double set point
OAT compensation
Boiler/Electrical heater integration
Condensing control
Auto adaptative function to reduce the water content of the plant
Managing of DHW 3-way valve (accessory)
Advanced pump management (both primary circuit and source side)
Remote keyboard (accessory) with possibility to connect (up to 100 m
distance) without any serial interface