Connection Of Auxiliary Accessories; Way Valve - Carrier AquaSnap Plus 30AWH004HB Installation Manual

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
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. 17). 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,
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.
(PINS: 4-N or 11-N, NUI CODE: 106 or 108)
• 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
Dehumidifier or Humidifier
A Dehumidifier or a Humidifier can be driven by Aquasnap Plus
using humidity sensor into 33AW-CS1 interface.
Connect electrically a Dehumidifier or a Humidifier to N, 11
terminals to a relay that drives Dehumidifier (NO contact) or
a Humidifier (NC contact)
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.
otherwise it will operate in standard 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.
(PINS: 5-N or 11-N, NUI CODE: 147 or 108)
• Ambient Temperature Reached: If suitably programmed using the
User Comfort Interface (NUI), 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. (PINS: 5-N, NUI CODE:147)
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 11 for the correct pin-outs and use of
the signals.
probe can be provided (NTC 2 wire, 3kΩ @ 25°C, Carrier code:
33AW-RAS01) remote. Connect the terminals of the probe
between PINS 23 and 24 of the terminal strip (see Fig. 17).
Configure NUI code 108 (2 for dehumidifier /Humid.)
Configure ambient humidity limit (NUI CODE 107) where
Dehumidifier or a Humidifier is activated (eg. with code 107 =
65, Dehumidifier is activated with ambient humidity >UR65%
5% hysteresis)
(Fig. 17)
30AWH 9