Electrical system
Relays
Sensors
Oil pressure relay - alarm
Note: Sensors are only available with "De Luxe"
instrument panels.
Oil pressure sensor
Fig. 122. Oil pressure relay
Contact type: Normally open. The contacts close if the
oil pressure in the engine drops below 0.3 ± 0.15 bar
(4.18
t 2 psi).
Fig. 125. Oil pressure sensor
Note: Checking of the closing point should be conduct-
ed with falling pressure.
Resistance testing: Measure with falling pressure and
with instrument connected. Measure with ohmmeter
class 1 at +20° C (+68°F)
Pressure
0 bar (0:
10 +3 /-5 Q
52 ±4Q
Refrigerant tem perature relay - alarm
2
4
6
bar (27.9 psi):
bar (55.8 psi):
bar (83.7 psi):
88 ± 4 Q
1 2 4 ± 5 Q
Refrigerant temperature sensor
Fig. 124. Refrigerant temperature relay
i7
Contact type: Normally open. The contact closes if the
refrigerant temperature rises over 95°C ± 3°C (203°F ±
5.6°F).
Note: Checking of the break point should be conduct-
ing with rising temperature.
Fig. 126. Refrigerant temperature sensor
Resistance sensor: Measure with the sensor sub-
merged to the hexagonal screw for three minutes in cir-
culating liquid and with the current switched on.
Temp. 60°C (+140°F):
134.0 ±13.5 S2 (t4°C, t7.2°F)
90°C
(+194°F):
51.2 ±4.3 Q
(t4°C, ±7.2°F)
100°C
(+212°F):
38.5 ±3.0 S2
(t40C, t7.20F)
79
| Categories | Volvo Penta Manuals |
|---|---|
| Tags | Volvo Penta MD2010, Volvo Penta MD2020, Volvo Penta MD2030, Volvo Penta MD2040 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
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