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Heat Pump Heat Recovery Units as standard consist of seven different parts as described; These parts
Exhaust Fan, Supply Fan, Fresh Air Filter, Exhaust Air Filter, Plate Type Heat Exchanger, Exhaust Coil and
Fresh Air Coil part, Compressor and Electrical Connection Box.
Figure 2.2.1 Heat Pump Heat Recovery Units Parts
DX Electronic Controller;
VHR DX type heat pump heat recovery units controlled by DX controller. The supply air fan and return air fan
are driven as 5 speeds with separately and with optionally added electrical heater can be set up with
electronic controller. Moreover electrical heater runs automatically through DX controller. Fresh air fan stop
running 30 seconds after to cool the electrical heater when the unit switch off.
DX controller has a protection system (optional) against the frost formation at the temperatures below -5
°C,
and Pressure Sensor (optional) for clogged filter.
Moreover to DX, CO
2
sensor or air quality sensor could be optionally connected. The fan speed automatically
changes by regarding to the sensor value.
Building Automation System;
DX controller has a digital input for Building Management System or VRF (VRV) System and also has a digital
output for the unit status information. Moreover, the unit can be controlled for all functions by the BMS or VRF
main control system through MODBUS.
Exhaust Air
Filter and
Fan Part
Compressor
Part
Fresh Air
Filter and
Fan Part
Heat Exchanger
Exhaust
Air Coil
Fresh Air
Coil
Electrical
Connection
Box
