Thrush Vertical Water CCirculators User Manual

Peru, IN 46970 [phone]

www.thrushco.com

9636-0200

VERTICAL WATER CIRCULATOR

INSTALLATION & OPERATING INFORMATION

Installing Circulator

Install flanges on pipe before connecting flanges to
circulator casing. Be sure ring gaskets are in place on
casing before drawing up flange bolts.

Lubrication

Oil all three cups before starting and every three months
therafter. Fill motor oil cups with S.A.E. #20 non-detergent
oil. Use S.A.E. #30 non-detergent oil for bracket. For high
temperature or continuous operation, more frequent oiling
will be necessary.

Wiring

Circulator motors have openings for BX connector and two
wiring posts under the terminal cover. Be sure two lead
wires are securely fastened under the terminal nuts. DO

NOT CONNECT SOLID CONDUIT TO CIRCULATOR
MOTOR. Use 18" flexible conduit between the end of the

solid conduit and motor.

Motor Rotation

All motors on Thrush circulators have counter clockwise
rotation looking a shaft end. When looking at motor end,
rotation will be clockwise.

Caution

Mechanical seal life is affected adversely by the presence
of abrasive impurities in the system. One of the most
common abrasives is black iron oxide. Another important
factor in seal life is water treatment. It is recommended
that the chromate content of the system not exceed
250 PPM.

9/08

P.O. Box 228 * 340 West 8th St.

Thrush Co., Inc.

Peru, IN 46970 [phone]

www.thrushco.com

VERTICAL WATER CIRCULATOR

TO REMOVE AND REINSTALL MOTOR

1. Turn off current and disconnect wiring to motor.

2. Loosen set screw "B".

3. Remove three bolts "D", and lift motor (with coupling
attached) from bracket. Each bolt has two mounting
springs (one above and one below bracket) and a
spring cup; caution should be exercised with these
parts as replacements are not furnished.

4. When replacing the motor, loosen the set screw "C"
and slide the coupling off of the old motor shaft.
Fasten the spring coupling to the new motor by
tightening the set screw "C" down on flat of motor
shaft. Coupling should be within 1/4" of the motor
face.

5. Set mounting springs in recesses on top of the bracket

6. Set motor in place on springs. Guide coupling over
impeller shaft. Assure mounting springs are in motor
base recesses.

7. Start motor mounting bolts "D" into motor, push down
on top of motor, applying enough pressure to relieve
spring tension on bolts "D" an hand tighten. Assure
that springs are seated in spring cups as shown in
illustration.

8. Stretch spring coupling approximately 1/8" toward
casing. CAUTION: Spring coils should not touch;
as this will result in excessive noise. Tighten set
screw "B" down flat on impeller shaft.

9. Rewire motor and turn on current. In installing new
motor, fill motor oil cups with S.A.E. #20 non­ detergent oil.

P.O. Box 228 * 340 West 8th St.

Thrush Co., Inc.