CIAT Ereba He Series, Инструкция по эксплуатации

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EREBA He
EN-66
NOTE:
The above water thresholds shall be reduced
by 5K if “Fluid Type” [P560] is configured as
Medium Brine (value 2).
IMPORTANT: Depending on the atmospheric
conditions in your area you must do the
following when switching the unit off in
winter:
● Add ethylene glycol or propylene glycol
with an adequate concentration to protect
the installation up to a temperature of 10
K below the lowest temperature likely to
occur at the installation site.
● If the unit is not used for an extended
period, it should be drained, and ethylene
glycol or propylene glycol should be
charged in the heat exchanger as a
safety precaution, using the water inlet
purge valve connection.
● At the start of the next season, refill the
unit with water and add an inhibitor.
●
For the installation of auxiliary equipment,
the installer must comply with basic
regulations, especially for minimum and
maximum flow rates, which must be
between the values listed in the operating
limit table (application data).
● To prevent corrosion by differential
aeration, the complete drained heat
transfer circuit must be charged with
nitrogen for a period of one month. If
the heat transfer fluid does not comply
with the manufacturer regulations,
the nitrogen charge must be added
immediately.
● If frost protection is dependent on
electric trace heaters, never switch off
their power.
● If trace heating is not used, or during a
prolonged power failure, the unit water
system must be drained to protect the
unit.
● The heat exchanger temperature sensor
are part of frost protection: If piping trace
heaters are used, ensure the external
heaters do not affect the measurement of
these sensors.
Please note that “water freeze
protection” and “home anti-freeze
protection” are two different modes.
Water freeze protection is used in
order to reduce the risk to freeze
the water exchanger and the water
pipes, whereas the home anti-freeze
protection is used to maintain the
minimum room temperature.
4.2.8 - Domestic hot water mode
For heat pumps with a domestic water tank
(only EREBA He), the DHW mode is used
to produce hot water for domestic purposes.
The system control manages the operation
of the hot domestic water tank, as well as the
diverting valve.
If the unit is fitted with a variable speed
hydraulic kit, then in DHW mode, the pump
must be controlled by the adjustable constant
speed logic (no ΔT logic).
And an additional water pump can be installed
on secondary water loop (refer to §Installation
with boiler for details).
a - DHW diverting valve
The units can drive a diverting valve to
manage a domestic hot water storage
tank application. In case of a domestic hot
water request, the operating logic controls a
diverting valve which directs the hot water to
the storage tank.
Characteristics
Diverting valve with spring return and two wires control
Recommendation:
- Kvs = 16
- Max. Temperature = 150°C
- CHAR:L
b - DHW temperature sensor or thermostat
According the configuration, it is possible
to control the DHW option with either a
temperature sensor or thermostat
Temperature sensor Thermostat
Characteristics
Accessory
Resistance = 10 KOhms
Cable length = 6 m
When the thermostat is
closed, the domestic hot
water mode is requested
4 - OPERATION