Bell & Gossett MK MV (8204, 8204X) - Manual (Page 40)

Service the pump
Type of service Purpose Inspection interval
Initial inspection To make a check up of the pump
condition by a Xylem authorized
service representative and, based
on the result and findings from
these measures, to determine the
intervals for periodical inspection
and major overhaul for the specific
installation.
Within the first year of operation.
Periodical inspection To prevent operational interruptions
and machine breakdown. Measures
to secure performance and pump
efficiency are defined and decided
for each individual application. It
can include such things as impeller
trimming, wear part control and
replacement, control of zinc-anodes
and control of the stator.
Up to every year. Applies to normal
applications and operating
conditions at media (liquid)
temperatures <40°C.
Major overhaul To secure a long operating lifetime
for the product. It includes
replacement of key components
and the measures taken during an
inspection.
Up to every 3 years. This interval
apply to normal applications and
operating conditions at media
(liquid) temperatures <40°C.
NOTICE:
Shorter intervals may be required when the operating conditions are extreme, for example
with very abrasive or corrosive applications or when the liquid temperatures exceed 40°C
(104°F).
Inspection
Service item Action
Cable 1. If the outer jacket is damaged, replace the cable.
2. Check that the cables do not have any sharp bends and are not
pinched.
Connection to power Check that the connections are properly tightened.
Electrical cabinets Check that they are clean and dry.
Impeller 1. Check the impeller clearance.
2. Adjust the impeller, if necessary.
Stator housing : standard version
Inspection chamber: Ex-version 1. Drain all liquid, if any.
2. Check the resistance of the leakage sensor.
Normal value approximately 1200 ohms, alarm approximately
430 ohms. Applicable for Ex-version.
Normal value approximately 1530 ohms, alarm approximately
330 ohms. Applicable for standard version.
Insulation Use a megger maximum 1000 V.
Maintenance
38 MK, MV (8204, 8204X) Installation, Operation, and Maintenance Manual