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LINE

LEADS

GREEN

GROUND

SCREW

ALTERNATE

GROUND SCREW

FIG. 4

CONDUIT BOX WIRING DETAIL

SYSTEM PREPARATION

Prior to pump start-up, closed heating and cooling systems

should be cleaned, drained, and refilled with clean water. The

system fluid pH must be maintained between 7 and 9.

START-UP

Do not start pump until the system has been filled and vented.

Air should be vented from the system by means of an air vent

located at a high point in the system. The system must be

completely vented prior to pump operation. Do not run Series

LR Circulators dry. Pump operation without water circulation

could result in pump and motor damage.

PERIODIC INSPECTION

Bell & Gossett Series LR Circulators are designed to provide

years of trouble free service. It is recommended that periodic

inspections be made to check for potential problems with the

pump. If any leakage or evidence of leakage is present, repair

or replace the unit.

WARNING: HOT WATER LEAKAGE HAZARD

Pressurize the body slowly while checking for leaks at

all joints with gaskets or solder connections. Failure to follow

these instructions could result in serious personal injury

and/or property damage.

WIRING INSTRUCTIONS

A. Loosen the screw securing the conduit box cover (wiring

compartment), and remove the screw & cover.

B. Attach the appropriate size connector to the hole in the side

of the conduit box.

C.Using a minimum size of 14 AWG copper electrical wire

(refer to your local code for wiring restrictions), wire the

motor to a single phase power source that matches the

electrical rating on the pump nameplate. See Fig. 3. Use

the size of electrical wire as dictated by local code.

D. Connect the ground wire to the inside of the conduit box

with one of the green screws provided inside the box. See

Fig. 4.

NOTE: Electrical supply and grounding wires must be suit-

able for at least 90°C (194°F).

NOTE: Series LR Circulators are impedance protected and

do not require external overload protection.

WARNING: ELECTRICAL SHOCK HAZARD

Be certain that all connections are secure and the

conduit box cover is closed before electrical power is

connected. Failure to follow these instructions could result

in serious personal injury, death and/or property damage.

WARNING: ELECTRICAL SHOCK HAZARD

Disconnect and lock out the power before making

electrical connections. Failure to follow these instructions

could result in serious personal injury or death.

PUMP

MOTOR

PUMP MOTOR

IMPEDANCE

PROTECTED

FUSIBLE DISCONNECT

OR CIRCUIT BREAKER BY

OTHERS

TYPICAL WIRING INSTALLATION SCHEMATIC

1Ø POWER SOURCE

TO REMOTE

CONTROL

IF REQUIRED

FIG. 3

ITT

8200 N. Austin Avenue

Morton Grove, IL 60053

Phone: (847) 966-3700

Fax: (847) 966-9052

www.bellgossett.com

ITT CORPORATION

PRINTED IN U.S.A. 12-07

THE ITT ENGINEERED BLOCKS SYMBOL AND

ENGINEERED FOR LIFE ARE REGISTERED

TRADEMARKS OF ITT CORPORATION

1 2 3 4

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