MAXA HWA1-A 0140, Руководство пользователя

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HWA1-A
Air/water chillers with axial fans
18
14.2.6 HEATING MODE ON DOMESTIC HOT WATER TANK
If the parameter Pa H130 is set to be 1 , the unit uses the domestic hot water tank also for heating the plant side. Under these
conditions, therefore, the relay that controls the domestic hot water will be excited even during heating mode operation and not
only in sanitary mode.
During the defrosting cycle and cooling mode, the valve will stop operation.
14.3 SUMMER/WINTER MODE ROMOTE COMMUTATION
Remote possibility of controlling the heating/cooling mode of the heat pump.
To enable this function, enter at the parameters PRG
→
PSS
→
PRG
→
(introduce the maintainer password)
→
PRG
→
PAr
→
PRG
→
CnF
See paragraph Errore. L'origine riferimento non è stata trovata. .
Parameter Unit Value Description Terminals Notes
H57 Num 3
Digital input for operazioni mode management.
Open contact
→
heat pump in ” cool ” mode ,
Close contact
→
unit operates in “ heat ” mode.
ID3E- ID3E Voltage free digital input
14.4 PLANT REMOTE CONTROL (MANAGEMENT)
It is possible to enable a plant temperature sensor in order to allow the on-board unit controller to correctly manage the
regulation.
To enable this function, enter at the parameters PRG
→
PSS
→
PRG
→
(introduce the maintainer password)
→
PRG
→
PAr
→
PRG
→
CnF
Parameter Value Description Terminals
H30 41 Enablement of the plant remote temperature sensor ST8E- ST8E
The plant circuit remote sensor adjusts the heat pump temperature only during the startup period of the compressor(s), the
shutdown is managed by the outlet temperature sensor of the heat pump. For more explanation herein below is reported an
illustrating table regarding the operation of the system:
Mode of operation Active call of the heat pump
Heating
Temperature detected by the outlet sensor of the heat pump < setpoint
Hea
-
b05
and
Temperature detected by the plant circuit remote sensor < water setpoint
Hea
- (
b22 - b05)
Cooling
Temperature detected by the outlet sensor of the heat pump > setpoint
Coo
+
b05
and
Temperature detected by the plant circuit remote sensor > setpoint
Coo
+ (
b22 - b05)
NOTE: b05=1°C; b22=5°C.
14.5 DOUBLE SET-POINT MANAGEMENT
The double set-point function introduces a second working set-point of the plant side (in both cooling and heating mode).
It is possible to configure in the user terminal block a digital input allowing the transition from the first to the second set-point and
vice versa.
14.5.1 SETTINGS
The parameter “ H129 ” of double setpoint mode setting (from maintainer menu):
H82 OPERATION
1 Classic mode
2 Double setpoint active in the summer
3 Double setpoint active in the winter
4 Double setpoint active in the summer and winter
To activate the function enter with maintainer password to the parameters:
Parameter Unit Default Value Description Terminals Notes
H57 Num 0 26 Digital input for second setpoint ID3E – ID3E -
H90 Num 0 25
Under-voltage output for 3 way valve
for radiant panels DO5E(phase)
DO5EN(neutral)
Under voltage output single
phase 230Vac, 50Hz, 5A resistive,
1A inductive to connect relay coil
for obtaining a free contact.
The under-voltage output with live contact for switching from first to second set-point and vice versa. This can be used, for
example, for switching a hydronic valve for to divert the water flow between the radiant system and the ventilation system. If it is
needed a relay should be used for the hydronic valve power supply.