Danfoss AK-PC 530 User Manual

AK-PC 530 Manual RS8EJ302 © Danfoss 05-2010 5
Condenser reference
The regulation reference is shown here.
r29 Pc ref. °C / Pc ref. b
Set point limitation
With these settings the setpoint can only be set between the two values.
(This also applies to regulations where the Xp band lies above the reference).
Max. permissible setpoint value. r30 PcRefMax °C / PcRefMax b
Min. permissible setpoint value. r31 PcRefMin °C / PcRefMin b
Correction of pressure measurement
An oset adjustment of the registered pressure can be made.
r32 AdjustSensor
Dimensioning temperature Dim tm
The mean temperature dierence across the condenser at maximum load (tm dier-
ence at max. load). This is the temperature dierence between the air and condensing
temperature.
r35 Dim tm K
Dimensioning temperature Min tm
The mean temperature dierence across the condenser at the lowest relevant
compressor capacity (tm dierence at min. load). This is the temperature dierence
between the air and condensing temperature.
r56 Min tm K
Reading your P0
This is where you can see the actual pressure that is being measured by the pressure
transmitter.
The value is part of the regulation, since the regulation signal for capacity regulation
originates from the pressure transmitter.
The value is part of the frost protection regulation, since the regulation signal for
capacity regulation originates from the temperature sensor.
r57 P0°C / P0 b
Reading your T0
This is where you can see the actual pressure being measured by the sensor chosen
for capacity regulation (the sensor is dened in o81). The value is displayed in °C.
r58 Cmp.CtrlSens
Compressor capacity Compressor pack cong.
Running time
To prevent frequent start/stop, values have to be set for how the relays are to cut in
and out.
Min. ON time for relays.
(The time is not used if the relay cuts an unloader in or out).
c01 Min.ON time
Min. time period between cutin of same relay.
(The time is not used if the relay cuts an unloader in or out).
c07 MinRecyTime
Setting for neutral zone regulation
Regulation band over the neutral zonen c10 + Zone k / + Zone b
Time delay between step cut-ins in the regulation band over the neutral zone c11 + Zone m
Time delay between step cut-ins in the regulation band over the "+Zone band". c12 + + Zone m
Regulation band under the neutral zone c13 - Zone k / - Zone b
Time delay between step cut-outs in the regulation band under the neutral zone c14 - Zone m
Time delay between step cut-outs in the regulation band under the "-Zone band" c15 - - Zone m
Pump down limit
The factory setting for this function is OFF.
Activate by setting a value corresponding to pressure under the zone and over the P0
min. limit.
The function keeps the last capacity step going until the pressure comes down to the
pump down limit. When this value is reached the last compressor will cut out.
Do not reconnect capacity until the pressure is once more above the neutral zone.
c33 PumpDownLim.
Compressor conguration
This setting only applies if “061” is set to “1” or “2”.
Here you set the predened combination of number of compressors and any unload-
ers.
1 = One compressor, 2 = two compressors, 3 = three, 4 = four.
5 = One compressor + one unloader. 6 = One compressor + two unloaders.
For 7 to 26: See survey on page 11
If the compressors are of dierent sizes the setting must be selected to either 4 or 0.
At pos. 0 it is up to you to determine which relays have to be drawn on at each of the
required capacity steps.
c16 Compr mode
Selection of coupling mode (See also the overview page 11)
1. Sequential: First relay 1 cuts in, then relay 2, etc. Cutout takes place in the opposite
sequence. (”First in, last out”).
2. Cyclic: An automatic operating time equalisation is arranged here, so that all steps
with motor connection will have the same operating time
3. Binary and cyclic (only for four compressors with "c16" set to 4.
c08 Step mode
Unloaders’ cutin and cutout mode
The relays for unloaders can be set to switch on when more capacity is required (set-
ting = 0), or they can switch o when more capacity is called for (setting = 1).
c09 Unloader
(switch on = 0)
(switch o = 1)

Danfoss AK-PC 530 Specifications

General

Brand	Danfoss
Model	AK-PC 530
Category	Controller
Language	English