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n01 and n02
Connection between the evaporating temperature and the
actuator's temperature (the values are approximate).
n01: The highest regulated room temperature will have a be longing t
in turn indicates the value of the n01 setting. Due to tolerances in the actua-
tor, the setting value must be 10 K higher than shown in the curve.
n02: The lowest occurring suction pressure will have a belonging t
turn indicates the value of the n02 setting. Due to tolerances in the actuator,
the setting value must be 10 K lower than shown in the curve.
CVQ
Start of controller
When the electric wires have been connected to the controller,
the following points have to be attended to before the regulation
starts:
1. Switch off the external ON/OFF switch that starts and stops the
regulation.
2. Follow the menu survey, and set the various parameters to the
required values.
3. Switch on the external ON/OFF switch, and regulation will start.
If the temperature fluctuates
When the refrigerating system has been made to work steadily,
the controller's factory-set control parameters should in most
cases provide a stable and relatively fast regulating system.
If the system on the other hand oscillates, you must register the
periods of oscillation and compare them with the set integration
time T
, and then make a couple of adjustments in the indicated
n
parameters.
EKC 361
ENGLISH
value which
o
value which in
o
Instructions RI8BF652 © Danfoss 12/2009
CVMQ
KVQ
4. If the system has been fitted with a thermostatic expansion
valve, it must be set to minimum stable superheating. (If a
specific T0 is required for the adjustment of the ex pansion valve,
the two setting values for the actuator temperature (n01 and
n02) can be set to the belonging value while the adjustment
of the expansion valve is carried out. Remember to reset the
values).
5. Follow the actual room temperature on the display. (On
terminals 2 and 5 a current signal can be transmitted which
represents the room temperature. Connect a data collection
unit, if applicable, so that the temperature performance can be
followed).
If the time of oscillation is longer than the integration time:
(T
> T
, (T
is, say, 4 minutes))
p
n
n
1. Increase T
to 1.2 times T
n
p
2. Wait until the system is in balance again
3. If there is still oscillation, reduce K
4. Wait until the system is in balance
5. If it continues to oscillate, repeat 3 and 4
If the time of oscillation is shorter than the integration time:
(T
< T
, (T
is, say, 4 minutes))
p
n
n
1. Reduce K
by, say, 20% of the scale reading
p
2. Wait until the system is in balance
3. If it continues to oscillate, repeat 1 and 2
by, say, 20%
p
7
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