65
Flow switch switching point, factory-set
Vitocal
Nominal flow rate Minimum flow
rate
Switching point
Type
m
3
/h
m
3
/h
m
3
/h
LED
WW 301.B125
WW 302.B125
29.55
21.30
20 .. 22
0
1
2
3
4
5
6
7
8
9
WW 301.B155
WW 302.B155
35.00
26.40
25 .. 27
0
1
2
3
4
5
6
7
8
9
WW 302.B200
45.60
33.10
30 .. 33
0
1
2
3
4
5
6
7
8
9
WW 302.B250
57.10
42.50
41 ..43
0
1
2
3
4
5
6
7
8
9
WW 302.B300
70.00
52.90
50 .. 54
0
1
2
3
4
5
6
7
8
9
Carry out an operating display adjustment (High Flow balancing, if required)
The High Flow balancing establishes the existing
(higher) flow rate as nominal flow rate.
Note
The High Flow balancing can shift the switching point
of the flow switch.
1. Start the appliance with the existing flow rate.
2. Hold down for around 5 s, until LED "9" flashes.
3. Release .
Checking the electronic frost stat, type AC1-2W
Fig.41
The electronic frost stat monitors the refrigerant tem-
perature on entry into the compressor.
Note
The frost stat switching points are factory-set.
Adjusting these switching points is possible in special
cases, for example if the flow temperature of the pri-
mary circuit (groundwater inlet into the heat pump) is
subject to severe fluctuations.
Frost stat switching point, delivered condition:
1SP = -1 °C
Open switching contact:
Frost protection enabled, compressor switches
itself off (message
"CA Protectn device
primry"
, see service instructions Vitotronic 200,
type WO1C).
1HY = 3 K
At 1SP + 1HY = 2 °C switching contact closed:
Heat pump in standby mode.
Setting the frost stat switching points (if required)
Press the following keys:
1. Hold down
+
simultaneously for 5 s; the 1st
parameter is displayed.
2.
/
for the required parameter.
3.
, to show the set value.
4. Hold down
and simultaneously set the required
value with
/
.
5. Release
to save the set value.
6. Press
or wait 30 s to exit the menu.
Commissioning, inspection, maintenance
Check electronic flow switch, type IFM
(cont.)
5549 984 GB
Summary of Contents for KWT BW 301.B090
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