Advantage Maximum MG Series - Pump Seal Service

Maximum Series Portable Chiller : Air & Water-Cooled : MG Series Instrument
update 08/02/2021
Page: 58
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
5.5 PUMP SEAL SERVICE
A. The coolant pump seal is a carbon/niresist
shaft seal assembly including a stationary
member, rotating member and tension
spring(gure5.5A).
B. The operator can determine the pump seal
isleakingwhenuidisidentiedleaking
from the pump case adapter. Generally, a
pump seal will leak due to inadequate unit
pressure,excessiveowand/orpooruid
quality.
C. The operator should follow this procedure to replace the
pump seal:
1. Disengage process operations. The operator
mustbecertainprocessuidtemperatureis
under 100°F and pressure is relieved (coolant
digital pressure gauge reads “0”) and water
make-upowisshutoffandallpressure
relieved.
2. Disengage main power supply. The operator
must verify the proper lockout procedures are
followed.
3. Access the pump motor by opening or removing
anycoverpanelsasnecessary(gure5.5B).
4. Drain machine. The machine can be drained
by using the drain valve located on the pump
case.Drainuidintoasuitablecontainerfor
reuseordisposalaccordingtomanufacturer’s
instructions (if a glycol solution is used).
5. Locate and remove the three motor wire leads
from the motor wiring terminals. The operator
should “map” the wire terminal locations to
ensure correct rewiring. The power cord should
beremovedfromthemotorhousing(gure
5.5C).
6. Locate and remove the pump casing bolts.
These bolts secure the motor and motor
adaptertothepumpcasing(gure5.5D).
7. Separate the motor and motor adapter from
the pump casing to expose the pump impeller
(gure5.5E).Removethemotorandmotor
Stationary member
Rotating Member Tension Spring
Figure 5.5A
Pump motor Figure 5.5B
Pump motor Figure 5.5C
Typical casing bolt Figure 5.5D