System preparation, Start-up, Periodic inspection – Bell & Gossett P86101D Series LR Circulators User Manual

Page 4: Wiring instructions

LINE

LEADS

GREEN

GROUND

SCREW

ALTERNATE

GROUND SCREW

FIG. 4

CONDUIT BOX WIRING DETAIL

7 N

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

Xylem Inc.

8200 N. Austin Avenue

Morton Grove, Illinois 60053

Phone: (847) 966-3700

Fax: (847) 965-8379

www.xyleminc.com/brands/bellgossett