TREF
Description
Standard features
DX Versions:
A Air-cooled units, with remote condenser
D Dual-Cooling air-cooled units, with remote condenser
F Indirect Free-Cooling units, with remote dry-cooler
Q Dual-Cooling water-cooled units
W Water-cooled units, for Cooling-Tower or Dry Cooler applications
Z Water-cooled units, for city water applications
Refrigerating circuit:
• Rotalock connection to make the installation easier
• Expansion valve with external equalization
• Filter dryer and sight glass
• Phase sequence relay
• HP manual pressure switch and LP automatic pressure switch
CW versions:
• Modulating 3-way valve
Air-flow configuration:
D Downflow
U Upflow
X Displacement
• Drain pan made of AISI 403 stainless steel
• Panels made in galvanized and powder coated RAL 7016
…..(anthracite grey) or RAL 9002 (grey white) metal sheet with
…..rounded edges
• Hydrophilic treated evaporating coil
• Air-flow switch
• G4 filter
• Supply- and return-air T sensors
• Backward curved blades fans with EC motors
• Full front accessibility for maintenance/servicing even with running unit
• Compressor compartment separated from the airflow
• Microprocessor control
• Automatic breakers
Options and accessories
• Programmable microprocessor control with LCD display
• Automatic air-flow control with display visualization
• Measurement and visualization of the water-flow and of the opening of the 3-way valve (for CW versions)
• Electronic driven electrical expansion valve
• Dehumidification with humidity sensor
• Humidifier with immersed electrodes
• Humidifier with immersed electrodes, drain pump and inspectable cylinder
• Electrical heaters
• Re-heating systems:
…..› Hot-water coil with modulating valve
…..› Hot-gas ON/OFF coil (for DX versions)
…..› PRECISE – hot-gas coil with modulating valve (for DX versions)
• Modulating hot-gas by-pass for capacity control
• Clogged filter sensors
• Condensing controls:
…..› Built-in control for air-cooled units (modulating fan-speed.control) with dedicated automatic breaker
…..› Pressostatic valve for water-cooled units
…..› Flooding valve on refrigerant side for external air T of -20°C
• Bigger liquid receiver
• 2-way valve for CW versions
• Water leakage, fire and smoke sensors.
…..Temperature and humidity additional sensors
• Programmable microprocessor
• Alarmoption with extra potential free contacts
• Rear air intake for upflow units
• Door closure by lifting rod
• Fresh air kit
• Base frame
• Base module
• Plenum for horizontal or vertical air discharge
• Direct Free-Cooling Plenum with modulating damper for downflow units
• Serial cards for protocols: Carel / Modbus / Lonworks / Trend
• HIWEB Hardware: Ethernet card for protocols: Bacnet / SNMP
• HIWEB Software: Ethernet card for Web connectivity
• GSM modem for SMS communication
• LAN connection up to 8 units
• Touch-Screen colour graphic display
• New designed external panels and sunken screws for hermetic air tightness due to newest rack specific door gaskets