Wilo HC 20.1 + EMU FA Serie Manual De Instrucciones página 166

en
6.4.2.2 Check the coolant
1
max
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Fig. 4: Check the coolant
166
Installation and electrical connection
1 Overpressure valve
2 Interior hexagonal head screw for motor cover fixation
- Drain the coolant
2
‡
Pump is not installed.
‡
Pump is not connected to the mains.
‡
Protective equipment must be put on!
1. Place the pump on a firm surface in a vertical position. WARNING! Risk of hands
being crushed. Make sure that the pump can not fall over or slip!
2. Position a suitable tank to collect the operating fluid.
3. To vent possible overpressure, unscrew the overpressure valve by around 3 to 4
turns.
CAUTION! Do not unscrew the overpressure valve completely!
4. Once the overpressure has vented, screw the overpressure valve back in. Max.
tightening torque: 55 Nm (40.5 ft·lb)!
5. Unscrew the interior hexagonal head screws on the motor cover in a crosswise
manner.
6. Remove the motor cover.
-
7. Two marks are worked into the inside of the housing. The operating fluid must
reach the upper "max." mark. If there is not enough operating fluid, fill the operat-
ing fluid up to the marking. Note information on operating fluid type, see chapter
"Maintenance and repair".
8. Take a sample of operating fluid using a test pipette.
9. Check the operating fluid:
⇒ If the operating fluid is clear, continue to use the operating fluid.
⇒ If the operating fluid is contaminated (cloudy/dark), add new operating fluid,
see chapter "Maintenance and repair". Dispose of operating fluid in accord-
ance with local regulations!
⇒ Notify customer service if the operating fluid contains metal swarf!
10.Clean the motor cover and renew the O-ring.
11.Place the motor cover on the motor housing and re-tighten the interior hexagonal
head screws. Max. tightening torque: see appendix!
WILO SE 2019-01