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Auxiliary accessories connection
3-way valve
The Aeromax Plus units drive a 3-way valve to manage
a sanitary water accumulation tank. The operating logic
provides that, in the case of a request for sanitary water by
an accumulation tank, the system controls a 3-way valve to
direct the hot water only to the tank and to operate at the
maximum capacity to provide water at 60 °C (compatible
with the operating envelope).
Frequency Limitation
To force the unit to operate at a lower maximum frequency
(to reduce noise) in the absence of a User Comfort Interface,
provide a Dry Contact (contact quality greater than 25mA
@ 12V) between PINS 13 and 14 of the terminal strip. With
the contact closed, the unit will operate with a maximum
frequency lower than the standard one, otherwise it will
operate in standard mode.
Stop Unit or Defrosting signals
There are several signals available on the terminal strip to
indicate particular conditions or the stop of the external
unit.The available signals are:
on the external environmental conditions, the unit could
perform defrosting cycles to clean the external battery of
any ice formations. Under these conditions, it is not
possible to guarantee the requested temperature output
water temperature, which could reduce general comfort.
compressor.
External temperature probe
If the positioning of the external unit could induce a
non-representative reading of the external temperature
by the probe positioned on the machine, an additional
Legionella Protection
It is rcommended that a separate 7 day programmer is
installed, connecting the immersion heater to it will allow
the system to be pastureised on a daily basis.
Example:
Heat pump programmed to heat water 4.00 am – 6.00 am
Immersion set to come on 6.00 am – 7.00 am to raise water
temperature to 60 °C +
Domestic hot water systems should incorporate a means to
prevent bacterial growth (including Legionella bacteria).
The heater should be connected via a time clock to take
the cylinder up to 60°C in time periods set out in the current
building regulations concerning control of legionella
bacteria.
20
The hot water request signal must be a Dry Contact type
(contact quality greater than 25mA @ 12V) that closes the
13 page 19).
Attention: The hot water request has higher priority than
the programmed operating mode in heating.
using parameters 5 and 6 from the User Interface menu
of the KHP0008. The maximum noise reduction is about
compressor
using the User Comfort Interface, and operating with this
interface, a signal is provided that indicates that the
pre-set temperature has been reached. This signal can be
used as the contact window normally implemented
in the fan-coils.
Several outputs are used for more than one condition. It
is possible to configure these outputs through the User
Comfort Interface installation menu (refer to the KHP0008
manual part number A9315). Refer to the tables for the
correct pin-outs and use of the signals.
remote temperature probe can be provided (NTC 2 wire,
3kΩ @ 25°C, Kingspan Part Number KHP0009). Connect
the terminals of the probe between PINS 23 and 24 of the
This should coincide with the pre-programmed heat up
by the Aeromax Plus Heat Pump e.g. switch on immersion
heater immediately after the heat pump programmer has
finished its time period. By this time the cylinder will be at
the maximum temperature achievable by the HP boiler.
Safety Executive Approved Code of Practice L8 document
(HSE ACoP L8).
L
230V
N
50HZ
E
(Fig. 13)
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