AIREDALE EasiCool Technical Manual page 13

Precision Air Conditioning
Hot Gas Re-Heat (HGRH)
(X Models)
The HGRH system consists of a heating coil and solenoid valve(s) and can be fitted to units with humidification selected.
The microprocessor monitors the temperature and humidity setpoints and initiates HGRH to provide optimum system
efficiency.
HGRH may be fitted instead of electric heating or low pressure hot water.
During dehumidification, the hot gas re-heat coil re-heats the cooled air from the evaporator coil using hot gas from
the discharge line to maintain the room setpoint. Normally reheating of the air during dehumidification is performed by
electric heating which requires additional power input. By utilising the available hot gas, the HGRH option does not
require additional power input and is therefore far more energy efficient than electric heating.
Average Energy Input Comparison HGRH vs Electric Heat
Suction Throttle Valve
The valve can be selected for units fitted with EEVs.
An electrically operated suction throttle valve can be fitted to provide accurate capacity control from 50% to 100%
depending on the room load. Precise temperature control is obtained as a result of modulating the refrigerant flow in the
evaporator by throttling the valve on the suction line.
100
90
80
70
60
50
40
30
20
10
0
Fully Closed
1 Capacity @ 24°C / 45% RH return air conditions
2 EER @ 24°C / 45% RH return air conditions
Electric Heat Energy Input
Comparable HGRH Energy Input
1
2
EasiCool Technical Manual 7525389 V1.8.0_05_2016
EasiCool™
Maximum
Minimum
Fully Open
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