Relays
Oil pressure relay - alarm
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).
Note:
Checking of the closing point should be conduct-
ed with
falling
pressure.
Refrigerant temperature relay -
alarm
Fig. 124. Refrigerant temperature relay
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-
i
ng with
rising temperature.
Sensors
Note:
Sensors are only available with "De Luxe"
i
nstrument panels.
Oil pressure sensor
Fig. 125. Oil pressure sensor
Resistance testing:
Measure with falling pressure and
with instrument connected. Measure with ohmmeter
class 1 at +20° C (+68°F)
Electrical system
Refrigerant
temperature sensor
i7
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.
7 9
Pressure
0 bar (0:
10 +3 /-5 Q
2 bar (27.9 psi):
52 ±4Q
4 bar (55.8 psi):
88 ± 4 Q
6 bar (83.7 psi):
124 ±5Q
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)
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