Danfoss 080Z2502 User guide

Type
User guide

This manual is also suitable for

Lighting control
AK-SC 255
Service Guide
ADAP-KOOL® Refrigeration Control System
Service Guide | Lighting control AK-SC 255
© Danfoss | ADAP-KOOL® | 2018.08
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Photocell type selection: Skylight (Enables the ‘slope between 2 points’ algorithm)
Control method setup MUST be: Schd and photo
Num of control points: 1
Trip level: 2000fc A middle range setpoint.
Trip Range +/- : The value added to the trip level to turn Sales Lights OFF and allow
them back ON.
Trip level of 2000 fc “plus” 200 trip range will turn lights OFF at 2200 fc.
Trip level of 2000 fc “minus” 200 trip range will allow sales lights back ON
at 1800 fc.
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Pre delay: Delay in minutes before the zone can come ON. (Scheduled time)
Post delay: Delay in minutes before the zone can be turned OFF.
Minimum ON time: The time that must elapse once the zone has been turned OFF,
before the zone can be turned OFF again.
Minimum OFF time: The time the zone MUST stay stay OFF before coming back
ON.
The ‘Min Out & Max Out’ fields would are interpreted as follows:
Min Out at:
If the skylight sensor indicated a reading greater than or equal to 1800 footcandles (fc),
the dimmer would be set to 2% . (Mnimum output)
Max out at:
If the skylight sensor indicated a reading at or below 800 fc, the dimmer would be set
to 65 % (Maximum output.)
All readings between these 2 extremes would set the dimmer output per the following:
(‘Min out at’ – sensor)
------------------------- x (‘Max. output’ – ‘Min. output’) + ‘Minimum output’
(‘Min out at’ – ‘Max out at’)
Thus, a sensor reading of 1200 fc would result in a dimmer output of:
(1800 – 1200) 600
----------------- x (65% - 2%) + 2 % = ------ x 63% + 2% = 39.8%
(1800 – 800) 1000
Service Guide | Lighting control AK-SC 255
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Based on “default” setpoints, the algorithm will work as follows:
Dimming Algorithm Reference Table
Actual fc
VO %
800
65% (maximum)
850
62%
900
59%
950
55%
1000
51%
1050
49%
1100
45%
1150
43%
1200
40%
1250
37%
1300
32%
1350
30%
1400
27%
1450
24%
1500
20%
1550
17%
1600
15%
1650
11%
1700
8%
1750
5%
1800
2% (minimum)
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Algorithm interval is the algorithm cycle.
Max rate of change is the percentage of adjustment per second.
With a setting of 1 % for a 1 second algorithm cycle, and a 2% minimum and 65 %
maximum output, the full range can be covered in 63 seconds. (1 percent per second
for 63 steps.)
This schedule turns the zone ON and OFF on a time base. (Setup for 24 hours)
Service Guide | Lighting control AK-SC 255
© Danfoss | ADAP-KOOL® | 2018.08
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Configuration of variable output. Setup for 0-10 vdc.
Misc. Conversion factor setup for Dimmer Feedback signal:
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Setup of analog inputs:
Skylight sensor to PHOTO-SKY type
Dimmer feedback to misc. conversion factor DIM FEEDBK
This calculation looks at the feedback signal and if it is ever above 70% will become
true. (The maximum allowed is 65%, and if wiring is disconnected, the signal will go
to 100%.)
Service Guide | Lighting control AK-SC 255
© Danfoss | ADAP-KOOL® | 2018.08
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Dimmer Disconnect relay setup: Ten minute delay for alarm trigger:
Sensor failure alarms setup screen: Covers High and Low conditions
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Software version and date stamp:
Dimmer Disconnect added to History samples:
Service Guide | Lighting control AK-SC 255
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Expanded status screen of dimming algorithm in operation:
Note run times and cycle counts.
User definable set point screen:
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Dimmer Health Check calculations:
The health check is basically a “pulse” of the dimmer algorithm.
Dimmer Health Check Relay setup:
Service Guide | Lighting control AK-SC 255
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Dimmer Health Check Alarm setup:
If the variables in the Dimmer Health Check calculations fail for (7) days, then the
Health Check Alarm becomes active and tigers. (7 x 24 = 168 hours)
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Service Guide | Lighting control AK-SC 255
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Service Guide | Lighting control AK-SC 255
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History screens:
The history sample below shows an ideal dimming scenario. The skylight sensor rises
at the peak light of the day and the system algorithm responds accordingly. The sales
lights go off at 2000 foot candles and back on at 1800.
This is a zoom view of the above history sample. Notice that the variable output and
the dimmer feedback are tracking right along with each other.
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Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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Danfoss 080Z2502 User guide

Type
User guide
This manual is also suitable for

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