Function of UA 300 D
15
E
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Version 2.03 27. Juni 2008
In two−zone operation, sensors R1.1 and R1.2 act on Relay 1 and sensors R1.3 and R1.4 act on Relay 2.
Verdampfer 2
Evaporator 2
Verdampfer 1
Evaporator 1
Valve 1
Return
air
R1.1
Return
air
Valve 2
R1.3
Supply
air
Supply
air
ZNR.
51203
72
531
E0
R1.4 (optionally)
R1.2 (optionally)
UA 300 D
Refrigeration point
controller
Defrost
heater 1
Defrost
heater 2
R1.1: Defrost
sensor
(Terminal
Z31/Z32)
R1.2:
Defrost sensor (optional)
(Terminal Z51/Z52)
R1.3: Defrost
sensor
(Terminal
Z81/Z82)
R1.4:
Defrost sensor (optional)
(Terminal Z01/Z02)
Valve 1:
Solenoid Valve 1 relay
(Terminal 25/26/28)
Valve 2:
Solenoid Valve 2 relay
(Terminal 35/36/38)
Defrost heater 1: Defrost relay 1
(Terminal 43/44)
Defrost heater 2: Defrost relay 2
(Terminal 53/54)
Defrost start
Defrosting can be started by two methods:
S
Internal timer
The next defrost cycle cannot be started before the safe defrost time (defrost parameter) has expired
even when defrosting is terminated by evaporator temperature.
Defrost times should preferably not be set between 02:00 and 03:00 hours so as to avoid problems
of missed or duplicated defrosting when the clock changes to or from daylight saving time.
S
Command via CAN bus (manual command, PC software command)
In every instance, the controller checks whether conditions for defrosting are fulfilled before defrosting is ac-
tually initiated. These conditions are:
Evaporator temperature lower than defrost termination temperature
With demand defrosting, defrost counter at 1 (UR 141)
Содержание UA 300 D
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Страница 6: ...Table of contents iv Version 2 03 27 Juni 2008 Notice ...
Страница 8: ...System Design of UA 300 D 2 Version 2 03 27 Juni 2008 Notice ...
Страница 40: ...Installation and Startup of UA 300 D 34 Version 2 03 27 Juni 2008 Notice ...
Страница 54: ...Operation of UA 300 D 48 Version 2 03 27 Juni 2008 Notice ...
Страница 100: ...Menu structure UA 300 D Controller type UR 141 94 Version 2 03 27 Juni 2008 Notice ...
Страница 108: ...Specifications of UA 300 D 102 Version 2 03 27 Juni 2008 Notice ...