Additional Generator; Integrated Pump Management; Mixing Valve For Underfloor Heating; Anti-Frost Protection - Hitecsa 105 Manual De Instrucciones De Uso, Mantención E Instalación

EN

7.14 ADDITIONAL GENERATOR

Through USER INTERFACE, it is possible to manage heat with BIVALENT
SYSTEM: activation of an auxiliary generator (es. electric heater, boiler)
for DHW production, with the aim of integrating or replacing, the heat pump
operation, during the periods when the external temperature is very low.
Capacity
100%
-20 -5
Outside air temperature
This free contact output (connector F – L , TERMINAL BLOCK) is active if
the external air temperature has a value below that set in parameter 138
(de- fault=5) for continuous time, through parameter 139 (default=30 min).
The following operation modes are set through parameter 137:
• Par=2 deactivation of the HP and activation of the Additional Generator
• Par=2 HP and Additional Generator simultaneously active
• Par 137 = 0: additional generator disabled
• Par 137 = one additional generator enabled with PdC that
down in the event of activation of the generator additional rides
• Par 137 = 1 additional generator enabled with PdC that it stays on in the
event of activation of the generator additional rides.
Additional generator is activated only if there is demand for hot water pro-
duction for heating DHW, only if required to the frequency inverter heat
pump (parameter 117) is different from zero.

7.17 INTEGRATED PUMP MANAGEMENT

The EWMIP 105-110-116 is equipped with the new P1Mb parameter, which enables pump management via Modbus. The following management
modes are available according to the parameter's value:
P1Mb = 0: management only from the UNIT'S ELECTRONIC CONTROL
P1Mb = 1: gestione solo da comando MODBUS
P1Mb = 2: management via UNIT'S ELECTRONIC CONTROL and via MODBUS; priority on last signal/control present
The table below summarises the pump's activation logics according to the value of the P1Mb parameter.
PUMP STATUS
P1Mb
0 (Default) Pump always ON (*)
1 Pump always ON (*)
2 Pump always ON (*)
(*) pump always ON, even if the unit is OFF from remote contact.
Load
0 +10
KL bridged contact
-
Pump only ON upon KTCR consent or thermostat installed by the customer
Pump only ON upon KTCR consent or thermostat installed by the customer
Section I :: User
Attention the Additional Generator (any external heat source)
must be provided with specific overtemperature and pressure sa-
fety devices positioned near the same, adequately protecting the
Capacity
system from temperature peaks and pressure avoiding damages
to things and/or injuries to persons.

7.15 MIXING VALVE FOR UNDERFLOOR HEATING

way mixing valve must be only used in systems provided with a "HIGH"
3-
temperature (fan coil) and "LOW" temperature (radiant) circuit.
Please contact an authorized service centre for the use of systems provi-
ded with a "HIGH" temperature (fan coil) and "LOW" temperature (radiant)
circuit.
+20°C
Note. The electrical connections above refer to the use of the mixing valve
0-10 V powered by 24V when supposed to be a 1KW resistor, to convert
the segment 0-20 mA to terminals + and -, the 0-10V signal useful to the
valve.

7.16 ANTI-FROST PROTECTION

The antifrost function involves the activation of Pump 1 circulator and/ or
the starting of the heat pump in heating mode according to multiple
intervention thresholds, depending on: external temperature, water tem-
perature and activation state.
CAUTION
To ensure the activation of the antifreeze function, it is sufficient for the
heat pump to be electrically powered.
In any case, with installations in particularly cold environments, it is always
advisable to mix the system water with a special anti-freeze solution.
Note:
To change the intervention thresholds of the antifrost protection, contact an
authorized service centre.
KL non-bridged contact
request from UNIT'S ELECTRONIC CONTROL
NOT ACTIVE
PRIORITY ON LAST SIGNAL/CONTROL SENT
26
Pump request from MODBUS
serial
NOT ACTIVE
Pump ON if Unit ON (*)
Pump OFF => compressor OFF
Pump ON if Unit ON (*)
Pump OFF => compressor OFF