Operation - Calorex VARIHEAT VH3 AA600 Manuel D'installation

1.1 OPERATION

When the SERIES 3 VARIHEAT is connected to the mains supply via an isolator and the isolator is energised,
the MAINS light on the side of the electric box will illuminate indicating mains ON and time clock will start to run.
The time clock has a battery reserve fitted which when charged will run for 100 hours so that isolating the machine
for short periods will not affect the time clock settings.
The SERIES 3 VARIHEAT unit is switched on to normal operation by an ON (I)/OFF (O) switch on the control
panel. When switched on the red indicator light will illuminate and digital controllers will light up.
Note digital water controller will be the only controller to light up when in economy mode.
Providing that the controls are set to the correct parameters; nominally 60% RH, 28ºC air temperature,
26ºC water temperature and fresh air switch set to AUTO, then the machine will operate automatically.
The 'unoccupied' temperature is set on the digital air controller and will be switched at the time set on the time
clock.
As the unit operates, the indicator lights will show the state of the control conditions, ie dehumidification,
heat to air and heat to water.
Other indicator lights are :-
Yellow for Fault (high or low refrigerant trip or soft start fault if fitted).
Yellow for Defrost
Green to indicate automatic operation.
See section 3.0 for control panel symbols.
PARAMETER CONTROLLERS
Each parameter, Relative Humidity, Water Temperature and Air Temperature is sensed within the machine
and the signal is taken to the relevant digital controller.
RH & Water Temperature controllers have two switching channels, also the Air Temperature controller for AA units
without room heating:
OUT1 which is set from the front panel, OUT2 which is factory pre-set.
The Air Temperature digital controller for units with room heating has three switching channels, one of which is for
setting OCCUPIED/UNOCCUPIED air temperature.
Each channel has a switching differential which is also factory pre-set. None of the factory settings should be
tampered with.
When the re-settable channel is adjusted all other settings and differentials automatically follow at the correct
relationship.
Nominal set point values & diffs RH%
Please note: on AA machines with no fresh air box or RCU, in occupied mode dehumidification stops once the Air
temperature is 2.5ºC above set point.
TIME CLOCK
The time clock setting determines the OCCUPIED/UNOCCUPIED periods and is set to match the operators
requirements regarding opening and closing times for the pool and possible times where the pool is covered.
The two settings are OCCUPIED or day time, and UNOCCUPIED or night time (covered).
The most obvious action of this change is to lower the pool hall air temperature to a determined level to
conserve air heating energy. This lowering of temperature is allowable because of the quiescent, and ideally
covered, condition of the pool.
Pool water occupied
Pool water unoccupied
Air temperature
Water temperature
=
=
O
Page 5
= 60% diff 3%
= 28ºC diff 0.5 ºC
= 26ºC diff 0.2 ºC
(no pool cover)
(pool covered)
SD437350 ISSUE 22