MAXA i-MAX 0466, Manual

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i-MAX
Industrial inverter air/water heat pump with axial fans
21
2. r14=1 , the electric heaters will be activated one excluding the other:
2.1. r20=0 , the priority is for the plant side (the sanitary heater will operate only if the thermoregulation for the
heater of plant side is achieved);
2.2. r20=1 , the priority is for the sanitary side (the electric heater of the plant side will operate only if the
thermoregulation of the sanitary heater is achieved).
9.8.6 MANAGEMENT OF THE CIRCULATOR WITH ACTIVE ELECTRIC HEATER
It is possible to activate the circulator of the heat pump when the plant system and/or the DHW auxiliary electric heaters are
active in the absence of compressors operations (for substitution, for alarm or for integration in band II or III).
For enabling this function, you should enter into the parameters as follow: press PRG

PSS

PRG

(then insert the service
password)

PRG

PAr

PRG

Fro:
- r33 = 0: The circulator of the heat pump will start operation upon request of the compressors or by the boiler.
- r33 = 1: The circulator of the heat pump will start operation if the plant circuit electric heater is active.
- r33 = 2: The circulator of the heat pump will start operation if the DHW electric heater is turning ON.
-
r33
= 3: The circulator of the heat pump will start if the plant system electric heater or if the DHW electric heater is turning ON.
The circulator will stop operation after the post-pumping ( P02 ).
9.9 BOILER ENABLEMENT
As an alternative resource to the use of DHW auxiliary electric heater, the boiler could start operation in integration or in
substitution to the heat pump.
Definition of the mode utilization of the boiler by setting the parameter r23:
- r23=0 (default) boiler not used (intervention priority is for electric heaters);
- r23=1 boiler used only on plant side (intervention priority is for electric heaters);
- r23=2 boiler used only for DHW hot water (intervention priority is for electric heaters);
- r23=3 (default) boiler used for both DHW hot water and plant sides (intervention priority is for electric heaters);
-
r23=4
boiler used with priority only for plant side (no priority intervention for electric heaters);
- r23=5 boiler used with priority only for DHW hot water (no priority intervention for electric heaters);
- r23=6 boiler used with priority on both DHW and plant sides (no priority intervention for electric heaters);
Settings of the parameter
r32
when the boiler is being installed:
- r32 = 0 : boiler without a circulating pump with thermoregulation to be performed by the heat pump unit.
- r32 = 1 : boiler equipped with independent circulating pump with thermoregulation to be performed by the heat pump unit.
-
r32 = 2
: boiler without circulating pump with independent thermoregulation.
- r32 = 3 : boiler equipped with a circulating pump with independent thermoregulation.
Parameter Unit Value Description Function Terminals
Notes
H81
Num 29 (default)
Under voltage output for
boiler activation
Boiler
activation
DO7E(phase)
DO7EN(neutral)
Under voltage output 230V ac, 50Hz, 2A (AC1), for
connection to the relay coil for obtaining a free contact
r23
Num 1/2/3/4/5/6 Utilization type of the boiler - -
-
r32 Num 1/2/3 Boiler is being installed - - -
(*) Otherwise, it is possible to use another output DO or OC.
The intervention modes of the boiler are settable as described in the paragraph 9.9.
9.10 ACTIVATION OF AUXILIARY ELECTRIC HEATERS AND BOILER DURING JOINT AND SUBSTITUTION
OPERATION TO THE COMPRESSOR
The available auxiliary elements for the joint or substitution operation are as indicated below:
- Boiler
- Plant auxiliary electric heater
- DHW (Sanitary) auxiliary electric heater
Considering the heating and/or sanitary mode of operation, there are 4 bands of operation:
When changing the values of the parameters r22 , r28 , r08 , you have to respect the following condition: r2 2 ≥ r28 ≥ r08 .
You can remove the zone corresponding to the “ in joint operation I ” just by putting r22=r28 ; you can also remove the zone
corresponding to the “
in joint operation II
” by putting
r28=r08
; and hence you can remove both “
in joint operations I and II
” just
by setting the three parameters as the following configuration r22=r28=r08 .
9.10.1 OPERATION IN HEAT PUMP MODE
In
Normal
operation of the heat pump, the electric heaters and/or the boiler will start working only if the heat pump goes into
error-alarm.
9.10.2 IN JOINT OPERATION (BAND I)
If the outdoor air temperature is included between r22 and r28, the compressor operates in synergy with the auxiliary electric
heaters during winter and domestic hot water mode.
In this operation area, the heat pump will start at the beginning and then the plant side auxiliary electric heaters will operate after
a period of time given by r12 (in minutes) and after r16 (in minutes) the DHW auxiliary electric heaters will start operation.