Carel MasterAria, User Manual

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21
ENG
MasterAria +030220481 - rel. 1.0 - 12.11.2007
Confi guration with electric heater
MasterAria can manage an electric heater with ON/OFF or proportional
0 to 10 Vdc control.
For confi guration:
dipswitch 4 = OFF, if a 0 to 10 Vdc signal is used (AHU with 1 coil only, 1.
so the other output, NO4 or NO5, is not occupied);
dipswitch 5 = ON and confi gure the output with the parameters P39,
2.
P40, P41, P42.
Press the MODE button until the display shows the heater icon.
3.
Fig. 4.c
Important:
Outputs NO4 and NO5 are available for the modulating 0 to 10
Vdc heaters. Outputs NO6 and NO7 are available for ON/OFF heaters and
have voltage-free contacts.
Important:
During the antifreeze alarm, only in the case of AHUs with
recirculation, the heater remains on until the temperature returns to
normal values. This applies to the modulating 0 to 10 Vdc (P39=17) or
ON/OFF heater (P39=18), but not the ON/OFF heater with option P39=6.
Selecting the electric heater
ON/OFF heater
There are 2 possibilities:
set P39=18 (or P40, P41, P42)
•
Also set P111 (heater activation delta from set point) and P112
(hysteresis);
set P41=6 (or P42)
•
Also set P46 (heater activation delta from set point) and P13
(hysteresis).
Modulating heater
Set P39 = 17 (or P40 =17);
•
Set P111 = heater activation delta and P117 = heater proportional
•
band.
Probes
The reading of the probes is aff ected by their position due to the
phenomenon of air stratifi cation. To overcome this problem, off sets can be
specifi ed depending on the operating mode (heating or cooling). Faults
with the control probe or the probe on one of the two heat exchangers
cause the fan to stop and the valve to close. The control probe is selected
by dipswitch.
It must be remembered that MasterAria performs control based on
the room temperature (intake/return probe or sensor on the “acqua”
terminal).
Recommended confi guration
probe description
associated
parameters
notes
B1
Intake-return probe/
Outside probe
(compensation)
P22, P58, P59,
P60
When DIP6 OFF
& P22=0: room
control probe.
B2 Heating coil probe P62, P63
B3 Cooling coil probe P64, P65
BT Probe on terminal P61
When DIP6 ON =
room cont. probe.
Tab. 4.e.a
Prog Description Def1 Def2 Def3 Min Max UM
15 Function of probe B1
0 use defi ned by
dipswitch 6 & P22
1 probe disabled
2 heating/cooling coil
probe
3 cooling coil probe
4 heating coil probe
5 control probe
(intake/return)
6 outside probe
7 outlet probe
7 7 7 0 7 ---
16 Function of probe B2
(see P15) 4 2 2 4 7 ---
17 Function of probe B3
(see P15) 6 6 6 0 7 ---
22 Select optional
compensation probe
0 Compensation
disabled
1 Compensation
enabled on
B1 = outside probe
2 Compensation
enabled on
B3 = outside probe
0 0 0 0 2 ---
58 probe B1 off set in
cooling 0 0 0 -99 127
°C/10
59 probe B1 off set in
heating 0 0 0 -99 127 °C/10
60 probe B1 off set in
AUTOMATIC 0 0 0 -99 127 °C/10
61 probe BT off set from
terminal -30 -30 -30 -99 127 °C/10
62 probe B2 off set in
cooling 0 0 0 -99 127 °C/10
63 probe B2 off set in
heating 0 0 0 -99 127 °C/10
64 probe B3 off set in
cooling 0 0 0 -99 127 °C/10
65 probe B3 off set in
heating 0 0 0 -99 127 °C/10
Tab. 4.e.b
CTA
R M
Fig. 4.d
Key:
AHU
air handling unit R intake/return
M outlet