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Idiomas disponibles
Idiomas disponibles
The
SHERPA
units drive a 3-way valve to manage a
sanitary water storage 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. 14). PINS 18 (Line)
and N (Neutral) power the valve (1ph ~ 230V, 2A max),
and a 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. 14).
ATTENTION: The sanitary water request has higher
priority than the programmed operating mode in both
heating and cooling mode.
To force the unit to operate at a lower maximum
frequency (to reduce noise) in the absence of a User
Interface, provide a Dry Contact (contact quality greater
than 25mA @ 12V) between PINS 13 and 14 of the
terminal strip (see Fig. 14). With the contact closed, the
unit will operate with a maximum frequency lower than
the standard one, otherwise it will operate in standard
mode.
using parameters 5 and 6 from the User Interface menu of
the B0813.
The maximum noise reduction is about 3dB at 75% of the
maximum operating frequency of the compressor.
8.3 - 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, UI CODE: 106 or 108)
22
•
Alarm: Indicates an alarm condition that stops the
compressor. (PINS: 5-N, UI CODE: 147 or 108)
•
Ambient Temperature Reached: If suitably
programmed using the User Interface (UI), 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, UI CODE:147)
Several outputs are used for more than one condition.
User Interface installation menu (refer to the B0813
manual).
Refer to the tables on the next two pages for the
correct pin-outs and use of the signals.
8.4 - 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, 3k @
25°C, code: B0814) remote. Connect the terminals of the
probe between PINS 23 and 24 of the terminal strip (see
Fig. 14).
SHERPA using humidity sensor into 33AW-CS1B
interface.
>UR65% 5% hysteresis).
8.6 - Additional water pump (ADD WP)
It is possible to connect an additional water pump through
the pins 12 and N. It is managed in the following way:
If OAT > temperature set in UI code 148.
The additional water pump activation depending by the UI
code 156.
1.
ON/ OFF depending on the outdoor unit water pump
logic, in case of SHW activation ADD WP is ON;
2.
ON/ OFF depending on the outdoor unit water pump
logic, in case of SHW activation ADD WP is OFF;
If OAT < temperature set in UI code 148.
The additional water pump activation depending by the
UI code 157 (0. always of, 1. on/of depending by EHS, 2.
always on).
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