Boiler Control - Mitsubishi Electric Climaveneta i-BX-004-013M Installation, Operation And Service Manual

COLLEGAMENTO ELETTRICO DI POTENZA ALLA RETE DI ALIMENTAZIONE INSTALLER CONNECTIONS
S8 Boiler (i-BX-N only)
A boiler can be used as a supplementary or replacement
heat source for the system.
Solution 1
System with heat pump and boiler with storage tank.
Solution 2
System with heat pump and boiler without storage tank.

Boiler control

(only if the electric heater on the outlet is disabled)
A) REPLACEMENT: the boiler is only enabled if the outside
air temperature is less than the value of parameter 0307
and the compressor is off, figure 3.
To enable boiler activation in REPLACEMENT mode set
parameter 0306=1 and 010H = 1
Boiler operation reflects the trend in water temperature, as
shown on the graph in figure 4.
If the heat pump shuts down due to an alarm the boiler is
activated automatically regardless of the outside air temper-
ature.
In REPLACEMENT mode the activation delay time is
ignored, and the boiler is activated immediately if necessary.
B) SUPPLEMENTARY: the boiler operates in supplemen-
tary heating mode, together with the compressor, to satisfy
the heating load.
Supplementary heating for low outside air temperature
The boiler is enabled only when the outside air temperature
is less than the value of parameter 0307, figure 3.
To enable the supplementary heating for outside air temper-
ature set parameter 0306 = 1 and 010H = 0
Boiler operation reflects the trend in water temperature, as
shown on the graph in figure 4.
24 i-BX-(Y)_i-BX-N-(Y) EN
1
18 19 25 34
2
18 19 25 34
Boiler operating parameters in REPLACEMENT mode
Description
Activation Boiler
0 = Boiler not enabled
1 = Boiler enabled
Type of boiler operation
0 = Supplementary
1 = Replacemen
Activation with low outside air
temperature
0 = Function not enabled
1 = Function enabled
Outside air temperature to enable
boiler
Minimum outside air temperature
for heat pump operation
Boiler hysteresis
Set the parameters following the sequence described in
the table
Boiler operating parameters in SUPPLEMENTARY mode
for outside temperature
Description
Activation Boiler
0 = Boiler not enabled
1 = Boiler enabled
Type of boiler operation
0 = Supplementary
1 = Replacement
Activation with low outside air
temperature
0 = Function not enabled
1 = Function enabled
Outside air temperature to enable
boiler
Minimum outside air temperature
for heat pump operation
Boiler hysteresis
Boiler activation delay time (allows
the heat pump to reach steady
operation and thus avoid activat-
ing the boiler when not needed)
Integration time to activate boiler
* set the value to the desired switch-off point
Set the parameters following the sequence described in
the table
I A I A
BT9
Boiler
BT9
Boiler
Menu Parameter Value to be UOM
no. set
Mn03 0301 1
Mn01 010H 1
Mn03 0306 1
Mn03 0307 Example
-5°C
Mn03 0311 = value 0304
Mn03 0316 Default: 4
Min: 0
Max: 20
Menu Parameter Value to be UOM
no. set
Mn03 0301 1
Mn01 010H 0
Mn03 0306 1
Mn03 0307 Example
-5°C
Mn03 0311 -20 (default)
to be set*
Mn03 0316 Default: 4
Min: 0
Max: 20
Mn06 0618 60
Mn06 0619 600 °C*sec
°C
°C
°C
°C
°C
°C
min.