Connection Of Auxiliary Accessories - Carrier Aqua SNAP PLUS 30AW Manual Del Usuario

Auxiliary accessories connection
3-way valve
The 30AWH 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).
For operation, connect the 3-way valve between PINS 18, N
and 10 of the terminal strip (see Fig. 8). PINS 18 (Line) and
N (Neutral) power the valve (1ph ~ 230V, 2A max), and a
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 (see
Fig. 17). 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:
• Defrosting: When operating in Heating mode, depending
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.
• Alarm: Indicates an alarm condition that stops the
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
temperature probe can be provided (NTC 2 wire, 3kΩ @
25°C, Carrier code: B036502H01) remote. Connect the
terminals of the probe between PINS 23 and 24 of the
terminal strip (see Fig. 17).
command signal (1ph ~ 230V, 2A max) is available on PIN 10.
If using a valve with spring return, only connect PINS 10
and N.
The sanitary water request signal must be a Dry Contact
type (contact quality greater than 25mA @ 12V) that closes
the circuit between PINS 15 and 13 of the terminal strip (see
Fig. 17).
Attention: The sanitary water request has higher priority
than the programmed operating mode in both heating and
cooling mode.
For correct operation, it is necessary to configure the unit
using parameters 5 and 6 from the User Interface menu of
the 33AW-CS1.
The maximum noise reduction is about 3dB at 75% of the
maximum operating frequency of the compressor.
• Ambient Temperature Reached: If suitably programmed
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 33AW-CS1
manual).
Refer to the tables on page 10 for the correct pin-outs and
use of the signals.
(Fig. 17)
30AW 9