HIdRos SHH 330, Technical Manual

Page: 20 / 56

SHH
Swimming pool dehumidifiers
MTSHHGB REV.072008
20
SAFETY DEVICES
DEFROSTING
The frost on the coil, obstructs the air flow, reduces the available exchange area and consequently the unit performances and can
seriously damage the system. All the units are supplied, standard, with a control which defrost automatically the heat exchanger if
necessary. This control provides a temperature probe (defrost thermostat) on the unit evaporator. When the defrost cycle is required,
the microprocessor control (according to set parameters) starts working (the yellow led turns on), the compressor is switched off
while the fan keeps on working. At the end of the defrost cycle, there is the dripping time (the green led starts flashing
HYGROSTAT (optional)
Hygrostat enables or disables unit operation depending on the humidity value desired.
To verify its correct operation, rotate the control knob clock wise (or set the desired value through the instrument keyboard if a
keyboard instrument should be present) and set the humidity desired value close to lower limit. At this point verify that fan and
compressor (after a time delay) will be started in sequence. Verify as well that the unit is stopped when humidity set is reached
THERMOSTAT (optional)
The thermostat is used when the unit is supplied with hot water coil.
To verify its correct operation, rotate the control knob clock wise (or set the desired value through the instrument keyboard if a
keyboard instrument should be present) and set the temperature desired value close to lower limit. At this point verify the fan is all
the time running and that compressor, after a time delay, is started.
Verify as well that the compressor is stopped when temperature set is reached.
HIGH PRESSURE SWITCH
The high pressure switch stops the unit when the condensing pressure is higher than the set value. The restart is manual (you need
to press the button on the pressure switch) and it can be carried out only when the pressure is under the value indicated by the
differential set (see table below).
LOW PRESSURE SWITCH
The low pressure switch stops the unit when the evaporation pressure is lower than the set value. The restart is automatic and it is
only possible when the pressure back over the value indicated by the differential set (see table below).
DEFROST THERMOSTAT
It’s a device which signals to the electronic control, the necessity to make the defrost cycle. Once the defrost cycle is activated, the
defrost thermostat determines also its conclusion
SAFETY DEVICE SETTING
Device Set-point Differential Reset type
Antifreeze thermostat °C 1 3 MANUAL
High pressure switch Bar 26 7,7 MANUAL
Low pressure switch Bar 0,7 1 MANUAL
ELECTRICAL DATA
Power supply V/~/Hz 400 / 3+N/ 50 Control circuit V/~/Hz 24 / 1 / 50
Auxiliary circuit V/~/Hz 230 / 1 / 50 Fans power supply V/~/Hz 400 / 3 / 50*
* 230/1/50 for SHH 330 and 400.