Rotate Impeller; Check The Coolant - Wilo HC 20.1+EMU FA Instrucciones De Instalación Y Funcionamiento

6.4.2.1

Rotate impeller

6.4.2.2

Check the coolant

1
max
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Fig. 4: Check the coolant
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
Installation and electrical connection
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is a danger of limbs being
severed! Protective gloves must be worn against cutting injuries.
‡
Pump is not connected to the power supply!
‡
Protective equipment has been put on!
1. Place the pump upright on a firm surface. WARNING! Danger of crushing hands. Make
sure that the pump cannot fall over or slip away!
2. Carefully and slowly reach into the hydraulics housing through the pressure port and
rotate the impeller.
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 3-4 turns.
CAUTION! Do not unscrew the overpressure valve completely!
4. Once the overpressure has vented, screw the overpressure valve back in. Max. tighten-
ing torque: 55 Nm (40.5 ft·lb)!
5. Unscrew the interior hexagonal head screws on the motor cover diametrically opposite.
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 operating 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, reuse operating fluid.
⇒ If the operating fluid is contaminated (cloudy/dark), add new operating fluid, see
chapter "Maintenance and repair". Dispose of operating fluid in accordance with lo-
cal 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!
en-US
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