5
Installation/assembly
Oil heater
Assembly and Operating Instructions – M1..N Series Single-Stage Helical Gear Units
61
5.17.1
Activation / deactivation behavior
•
The oil heater is activated when the factory set temperature is reached. This tem-
perature setpoint depends on the following factors:
– With splash lubrication/bath lubrication: The pour point of the used oil
– With pressure lubricated gear units: Temperature at which the oil viscosity
reaches a maximum of 2000 cSt
ISO VG
Trip point for splash/bath lubrication
°C
460
320
220
Mineral oil
-8
-12
-16
Synthetic oil
-20
-25
-29
ISO VG
Trip point for pressure lubrication
°C
460
320
220
Mineral oil
+20
+15
+10
Synthetic oil
+15
+10
+5
•
The oil heater is deactivated when the set temperature is exceeded by 8 to 10°C.
Thermostat and oil heater are usually installed on the gear unit and are ready for
operation but without electrical connections. Therefore, do the following before startup:
1. Connect the resistor element ("Oil heating") to the power supply
2. Connect the thermostat to the power supply
5.17.2
Technical data of resistor element
The following information applies to 50 Hz and 60 Hz.
M1..N
Power
W
Voltage
V
AC
10
–
–
20
330
230
30
670
230
40
670
230
50
1000
400Y/230Δ
60
1000
400Y/230Δ
70
1500
400Y/230Δ
80
1500
400Y/230Δ
90
2000
400Y/230Δ
100
2000
400Y/230Δ
110
2330
400Y/230Δ
120
3000
400Y/230Δ
29203856/EN – 03/2020
