Bell and Gossett Circuit Sentry Flo-Setter User manual

Circuit SentryTM Flo-Setter
Balance & Commissioning Valves
with NPT Connections
INSTALLATION, OPERATION AND SERVICE INSTRUCTIONS
INSTRUCTION MANUAL
310952B

Installation, Operation and Service Instructions
INSTRUCTION MANUAL 310952B
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
NOTE: This product is not intended for use in potable water applications.
WARNING: California Proposition 65 Warning! This product contains chemicals known
to the State of California to cause cancer and birth defects or other reproductive harm.
SAFETY
INSTRUCTION
This safety alert symbol will be used in this manual to
draw attention to safety related instructions. When used,
the safety alert symbol means ATTENTION! BECOME
ALERT! YOUR SAFETY IS INVOLVED! FAILURE TO
FOLLOW THE INSTRUCTIONS MAY RESULT IN A
SAFETY HAZARD.
OPERATIONAL LIMITS
Circuit Sentry
Flo-Setter
Maximum Limitations
Pressure (PSI) Temperature °F
NPT 300 250
DESCRIPTION
Bell & Gossett Circuit SentryTM Flo-Setter Balance &
Commissioning Valves are precision engineered valves
used in heating and cooling systems for the distribution
of flow in various sections of the system. The dynamic
balancing and commissioning valve ensures easy and
reliable balancing of the system, regardless of any
fluctuations in the differential pressure of the system.
The Bell & Gossett Circuit Sentry Flo-Setter limits the
maximum flow in the system and can be used in both
variable and constant flow systems. The clear scale on the
lockable handle ensures that flow setting is simple and
user friendly while the integral P/T ports allow verification
of pressure.
INSTALLATION INSTRUCTIONS
Circuit Sentry Flo-Setter Balance & Commissioning
Valves are uni-directional valves and can be installed in
most altitudes; however, they should be installed in a
position to facilitate the ease of balancing the system. Be
sure to install the Circuit Sentry Flo-Setter with the arrow
pointing in the direction of flow.
CIRCUIT BALANCE VALVES
WITH NPT CONNECTIONS
Apply pipe compound conservatively to male
connecting fittings only.
CAUTION: The use of Teflon impregnated
pipe compound and Teflon tape on
threads provides lubricity. Care should
be taken to prevent over tightening of the valves
which may damage the Circuit Sentry Flo-Setter.
Check connections for leaks.
OPERATION INSTRUCTIONS
HOW TO USE BELL & GOSSETT CIRCUIT SENTRY
FLO-SETTER BALANCE & COMMISSIONING VALVES
FOR PRE-SET FLOW BALANCING
The Circuit Sentry Flo-Setter Balance & Commissioning
Valve is easily set, and the pre-setting is read on the
scale. The flow rate of the valve can be determined from
the flow rate graphs for the valve dimension in question.
See the flow rate graphs of the valve in the FLOW CURVE
BOOK (G10092) or Submittal (A-609.22 or A-611) for
further information about the adjustment setting.
Select the appropriate size Circuit Sentry Flo-Setter
Balance & Commissioning Valve (normally line size) for
the required GPM.
Please note: The scale is for the adjustment of flow. If you
want to close the branch line, use an isolation ball valve
in conjunction with the Circuit Sentry Flo-Setter.
The handle can be locked after adjustment. Remove the
B&G logo cap and tighten with 5mm hexagonal key.
HOW TO USE BELL & GOSSETT CIRCUIT SENTRY FLO-
SETTER TO PROPORTIONAL BALANCE A SYSTEM
The system is easily balanced by adjusting the pump
according to the required differential pressure across the
critical valve.
When the differential pressure is available the system will
automatically be balanced.

HOW TO USE BELL & GOSSETT CIRCUIT SENTRY FLO-
SETTER BALANCE & COMMISSIONING VALVES AS
FLOW METERS
The flow through the valve can be identified by
measuring the differential pressure (Δp) across the valve.
If the measured differential pressure is above the
minimum Δp, the flow is the one stated on the graph
for the valve.
If the measured differential pressure is below the
minimum Δp, the flow can be found by using the
formula below.
Q = Cv x Δp
Q Flow Rate GPM
CvFlow Coefficient GPM/PSI
Δp Differential Pressure PSI
WARNING: Hot water leakage can occur
from readout valves (P/T ports) during
probe insertion and during hookup of readout
kit. Follow the instruction manuals supplied with
readout probes and readout kits for safe use.
Failure to follow these instructions could result in
serious personal injury or death
and property damage.
SERVICE INSTRUCTIONS
Periodically inspect the Circuit Sentry Flo-Setter for signs
of leakage or corrosion.
WARNING: Corrosion or leakage are
indications that the Circuit Sentry Flo-
Setter must be replaced. Failure to follow
these instructions could result in serious personal
injury or death and property damage.
INSULATION
Bell & Gossett recommends that insulation be attached
to the Circuit Sentry Flo-Setter after the system has been
balanced.
NOTE: Tape or other acceptable means should be used
to secure the insulation to the Circuit Sentry Flo-Setter
Balance & Commissioning Valve.
Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2011 Xylem Inc. 310952B December 2011
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