Bell & Gossett MK MV (8204, 8204X) - Manual (Page 41)

Service item Action
1. Check that the resistance between the earth (ground) and
phase lead is more than 5 megohms.
2. Conduct a phase-to-phase resistance check.
Junction box Check that it is clean and dry.
Lifting device Check that local safety regulations are followed.
Lifting handle
: Ex-version 1. Check the screws.
2. Check the condition of the lifting handle.
3. Replace if necessary.
Lifting eye bolts: Standard version 1. Check that they are screwed firmly against the base.
2. Check that they are situated on same plane.
3. Check the condition of the lifting eye bolt.
4. Replace if necessary.
O-rings 1. Replace the oil plug O-rings. Applicable for standard version.
2. Replace the coolant plug O-rings.
Applicable for Ex-version.
3. Replace the O-rings at the entrance or junction cover.
4. Grease the new O-rings.
Personnel safety devices Check the guard rails, covers, and other protections.
Rotation direction Check the impeller rotation.
Seal housing: Ex-version
Oil housing: Standard version Fill with new oil, if necessary. Applicable for standard version.
1. Fill with new coolant, if necessary. Applicable for Ex-version.
2. Check that the freezing point is lower than -13°C (9°F).
Terminal board block/closed end
splice
Check that the connections are properly tightened/connected.
Thermal contacts Normally closed circuit; interval 0–1 ohm.
Voltage and amperage Check the running values.
Major overhaul
For a major overhaul, take this action in addition to the tasks listed under Inspection.
Service item Action
Support and main bearing Replace the bearings with new bearings.
Mechanical seal Replace with new seal units.
Service in case of alarm
For information about indication values for sensors, see Sensor connection characteristics
(page 28).
Maintenance
MK, MV (8204, 8204X) Installation, Operation, and Maintenance Manual 39