Installation manual

40
Immersion Heater Controller
Dimensions 180mm (w) x 110mm (h) x 87mm (d)
Material Polycarbonate
Ambient temperature -25°C to +70°C
Nominal supply voltage 220V - 240V AC
Maximum supply current 16A
Technical specification
Please refer to the electrical connection diagram on
Page 21.
Electrical connection
The operation of the immersion heater controller is
determined by the time setting in the 7 day hot water
programmer T
on
and the internal timer relay delay T
r
. The
diagram shows the possible operating sequences.
In part 1 of the DHW demand program T
on
is greater than T
r
.
In this case the heat pump will run in DHW mode for T
r
minutes. The heat pump will then revert to heating mode and
the immersion heater will operate for the remaining time (T
on
-
T
r
).
In part 2 of the DHW demand program T
on
is less than T
r
. In
this case the heat pump will run in DHW mode for T
on
minutes. The heat pump will then revert to heating mode. In
this case the immersion heater will not operate.
Part 3 of the DHW demand program shows the effect if T
on
is greater than 2T
r
. In this case the heat pump will run in
DHW mode for T
r
minutes. The heat pump will then revert to
heating mode and the immersion heater will operate for T
r
minutes also. The heat pump will then return to DHW mode.
This type of operation is not recommended and timings for T
on
should set as for those in part 1 & 2.
The default setting for T
r
is 50 ± 3 minutes. Please refer to
the Homeowners Guide for recommended settings for T
on
on
the 7 day programmer.
Note: the immersion heater will be deactivated when the
DHW cylinder temperature rises above the setting of the
internal immersion heater thermostat.
Installation Pack
Read the following instructions before starting the installation.
This product is an Immersion Heater Controller for Aeromax Plus heat pump systems. It is installed to
control the operation of the immersion heater to sanitise the Domestic Hot Water cylinder to prevent
Legionella growth. The Immersion Heater Controller is used in conjunction with the 7 Day Hot Water
Programmer to determine the day(s) and times for sanitisation.
Operation
DHW Demand (From 7 day programmer)
On
Off
Heat Pump Mode
On
Off
Immersion Heater Operation
Heating
DHW
T
on
> T
r
T
on
< T
r
T
on
> 2T
r
T
r
T
r
T
r