L Inspection And Maintenance Work; Characteristic Values For The Internal Temperature Sensors, Hydraulic Circuit; N Characteristic Values For The Vr10 Internal Temperature Sensors, Cylinder Temperature - Vaillant VWL Series Operating Instructions Manual

Appendix
L Inspection and maintenance work
# Maintenance work
1 Checking the pre-charge pressure of the expansion vessel
2 Check that the prioritising diverter valve can move easily (visually/audibly)
3 Checking the electronics boxes, removing dust from the ventilation slits
M

Characteristic values for the internal temperature sensors, hydraulic circuit

Sensors: TT620 TT650
Temperature (°C)
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
N Characteristic values for the VR10 internal temperature sensors, cylinder temper-
ature
Temperature (°C)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
58
Resistance (ohms)
33400
25902
20247
15950
12657
10115
8138
6589
5367
4398
3624
3002
2500
2092
1759
1486
1260
1074
918
788
680
588
510
Resistance (ohms)
88130
64710
47770
35440
26460
19900
15090
11520
8870
6890
5390
4240
Installation and maintenance instructions Hydraulic Station 0020291544_01
Interval
Annually
Annually
Annually
39