RTMA multi-pipe units

344-661 kW

Semi-hermetic screw compressors
ECO profile axial fans, statically and dynamically balanced
Water side evaporator direct expansion shell and tube type with water connections (complete with differential pressure switch and electrical heater)
Recovery heat exchanger direct expansion shell and tube type with water connections
High efficiency condenser coils with seamless copper tubes and aluminium fins
Different built-in hydraulic kits available with cooling and heating circuit pumps of 150/250/450 kPa
Electronic expansion valve
Double set point temperature
Condensing and evaporating pressure control with variable fan speed modulation for external temperature up to -15°C
Intelligent microprocessor-based controller
Serial card RS485 for Modbus
Galvanised steel base frame and panels in powder painted galvanised steel sheet for outdoor installation

Standby pump for air conditioning circuit + standby pump for heating circuit, 150/250/450 kPa
High temperature module for hot water up to 65°C
Automatic circuit breakers
Softstarter
Numbered wires
Gas gauges
Control panel electric heater with thermostat
Phase failure protection relay
EC fan motors
High static pressure (100 Pa) EC fans
Condensing coil protection grille
Epoxy coated condensing coils fins
Copper/copper condensing coils
Tinned copper/copper condensing coils
BLYGOLD treated coils
Pre painted condensing coils

Two completely independent circuits are controlled by 2 controllers, each handling a single circuit. The two controllers communicate with each other via ModBus™.
Ability to interface with the main BMS systems via ModBus™, BACnet™ or LonTalk™
Condenser/evaporator pressure control with variable fan speed modulation to allow low ambient operation down to -20°C (scroll) and -15°C (screw)
Phase failure protection on compressors and fans
Compressor starting with start-up and stop time control
Compressor rotation with FIFO logic

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