1.1 OPERATION
The AA300/AA500 is connected to e control panel and en to e isolated
mains supply as described in section 2.3. The isolator is en energised. The
MAINS light on e side of e heat pump will illuminate indicating mains ON.
If e AA300/AA%00 is fitted wi an LPHW e time clock will start to run.
The time clock has a battery reserve fitted which when charged will run for
100 hours so at isolating e machine for short periods will not affect e time
clock settings.
The AA300/AA500 unit is switched on to normal operation by an ON (I)/OFF
(O) switch on e console.
When switched on e red indicator light will illuminate and digital controller(s)
will light up.
Providing at e controls are set to e correct parameters; nominally 60%
RH, (28ºC air temperature), e machine will operate automatically.
For AA300/AA500s wi LPHW fitted, e ‘unoccupied’ temperature is set on
e digital air controller and will be switched in/out by e time set on e time
clock.
As e unit operates, e indicator lights will show e state of e control
conditions, ie dehumidification, heat to air.
See section 3.0 for control panel symbols.
PARAMETER CONTROLLERS
Each parameter, Relative Humidity (and Air Temperature) is sensed wiin e
machine and e signal is taken to e relevant digital controller.
The RH controller has two switching channels, OUT1 (e Set Point) which is
set from e front panel, and OUT2 which is factory preset.
When fitted, e Air Temperature controller has ree switching channels, one
of which is for setting e OCCUPIED/ UNOCCUPIED air temperature. (See
section 1.2)
When fitted, e Water temperature controller has two switching channels,
OUT1 (e Set Point) which is set from e front panel, and OUT2 which is
factory preset.
Each channel has a switching differential which is also factory pre-set. None of
e factory settings should be tampered wi.
When e re-settable channel is adjusted all oer settings and differentials
automatically follow at e correct relationship.
Nominal set point values & diffs
RH% = 60% diff 3%
Air temperature = 28ºC diff 0.5 ºC
Water temperature = .26ºC diff 0.2 ºC
Please note: on AA machines wi LPHW, in occupied mode dehumidification
stops once e air temperature is 2.5ºC above set point.
6 SD611250 ISSUE 7
AA300AVH/AA500AVH OWNER INSTALLATION MANUAL