Carel FLSTDMAHUE, Руководство пользователя

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ENG
“FLSTDMAHUE” +030220961 - rel. 1.1 - 28.08.2019
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9.18 Cooling devices
The following cooling devices are managed (Ha06):
•
valves: 0 to 10 V with one analogue output
•
floating valves, with two relays outputs, one for the open command and
one for closing;
•
direct expansion: stepped control, calling the condenser only without
management of the refrigeration cycle.
Req_cool
Out
10 V
0
0 V
100%
Req_cool
Out
P
2P
3P
St1
St1+St2
0 25% 50%
4P
St1+St2+St3
75%
St1+St2+St3+St4
100%
Key
Req_cool Cooling request St1 to 3 Step 1 to 3
P Capacity
Note : the total cooling request is divided between the various cascade
control devices, based on the PID control parameters, and is affected by
the supply limits.
9.19 Heating devices
The following heating devices are managed (Ha05, Ha08):
•
valves: 0 to 10 V with one analogue output
•
floating valves, with two relays outputs, one for the open command and
one for closing;
•
heaters.
Note : the total heating request is divided between the various cascade
control devices, based on the PID control parameters, and is affected by
the supply limits.
The heaters may be on/off or modulating, for the selection see parameter Ha05.
Screen index Display description Selection
Ha05 Heaters type On/Off ¦ Modulating ¦ On/Off binary
The type of control depends on the number of heaters:
1. Modulating: see the graph in the previous paragraph;
2.
ON/OFF;
3.
ON/OFF binary (for 2 heaters only): if the heaters are suitably sized (R1
with power P and R2 with power 2P) the controller can deliver capacity
in steps from 0 to 3P (figure).
Pre-heating heaters
Type ON/OFF, Modulatingi, ON/OFF binary
ON/OFF binary control for 2 heaters
Req_heat
Out
P
2P
3P
R1
R2
R1+R2
0
33% 66%
Fig. 9.o
Key
P Power R1,2 Heater 1, 2
Req_heat Heating request
If control is modulating and there is one heater, this will be controlled by a
digital output plus 1 analogue output for modulation, while if there are from
2 to 4 heaters (with the same power rating) modulation will only be applied
to one heater (1 digital 1 analogue output) and the remaining
heaters will be controlled by digital outputs only.
Outputs for modulating heater control
No. Heaters Digital outputs Analogue outputs
1 1 1
2 2 1
3 3 1
4 4 1
Tab. 9.h
0%
R1
R2
R3
R4
Req
0% 25% 50% 75% 100%
100%
OFF
ON
ON
OFF
OFF
ON
OFF
ON
R1
Key
Req Request R1…R4 Heater 1…4
9.20 Fan management
Note: see the par. on “On/Off ” for fan activation with damper limit
switch.
Regardless of the type of fans, these only start when the unit is on and the
dampers are completely open (delay=opening time). When both these
conditions are true, the fans are activated immediately. If the dampers are
no longer open, the fans are stopped immediately. Alternatively, they may
be stopped after a delay to allow for any thermal inertia of the coils (delay =
closing delay).
Note : the total cooling request is divided between the various cascade
control devices, based on the PID control parameters, and is affected by
the supply limits.
Screen index Display description Def Min Max UOM
Hc03 Damper setting
Opening time
120 0 9999 s
Closing delay 120 0 9999 s
On screen Ha01, can you select if fans are presents in:
•
supply;
•
return.
When the number of fans are selected, select the type:
Type of fan control
Selection Type of control Outputs
envisaged (*)
DIG AN
Inverter Air quality 1 1
Static pressure
On-off
(double) Two fans installed in parallel to modify the venti-
lating section. Same control as direct starting with
delay set between the two 2 -
On-off
(star – delta) Same as direct starting with setting of contactor
digital outputs 3 -
On-off
(direct starting) Fan start-up linked only to unit power-on 1 -
On-off
(backup fan) Pair of fans where one is the backup for the other
in the event of faults (flow, thermal overload alarm) 2 -
On-off
(2 speed) Speed 1. Unit ON
2. Air quality request
Tab. 9.i
(*) if only supply fan fitted. Double the number of outputs with supply and
return air fans.