INSTRUCTION MANUAL
V58045B
1
/2 1SEZISTPN& TAEWS "1 OT "
1
/4" TO 21/2" SWEAT & NPT SIZES
Circuit Setter Plus®Model MC
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
NOTE: Bell & Gossett does not
recommend Circuit Setter Plus
®
components to be used for potable water.
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 THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.
OPERATIONAL LIMITS
WORKING PRESSURE & TEMPERATURE LIMITS
(SOLDER TYPE LIMITS FOR ANSI STD. B16.18)
Maximum Maximum
Type
Solder
95-5 300 (2069) 200 (93) 300 (2069) 175 (79)
TIN- 250 (1724) 225 (107) 250 (1724) 200 (93)
ANTIMONY 200 (1379) 250 (121) 175 (1207) 250 (121)
Limitations Limitations
1
/2" - 1"1
Pressure Temp Pressure Temp
psi (kPa) °F (°C) psi (kPa) °F (°C)
1
/4" - 21/2"
DESCRIPTION
Circuit Setter Balance Valves are precision engineered valves
which function as precise system balance valves and highly
accurate variable orifice flow meters. Circuit Setter Balance
Valves are equipped with an easy to operate memory stop
feature. NPT and Sweat models are also equipped with a
drain port feature.
WARNING: Damage to the Circuit Setter or failure
of solder sealing joints may occur if these operational limits are exceeded. This can result in water leakage. Failure to follow this instruction can cause serious
personal injury and/or property damage.
INSTALLATION INSTRUCTIONS
NPT and sweat style Circ uit Setter Ba lance Valv es are
equipped w
is to be used to drain a riser on the downstream side of a terminal unit, it should be situated on the terminal unit side of
the riser when installing the Circuit Setter.
FOR INSTALLING SWEAT CONNECTION:
a) Clean tube ends and valve connections thoroughly per
good piping practices with a fine grade emery cloth or fine
grit sandpaper.
b) For soldering, use 95-5 (Tin-Antimony) s
grade of flux.
c) Use a torch with a sharp pointed flame.
d) When sweating the joints, first adjusting the valve in the full
open position, then wrap the valve with a cool wet rag and
then direct the flame with care to avoid subjecting the valve
to excessive heat. Allow the valve to cool before touching
or operating.
ith a 1/4" NPT plugged drain port. If the drain port
older and a good
e) Check the soldered connection for leaks.
FOR INSTALLING NPT CONNECTIONS:
Apply pipe compound conservatively to male connection
fittings only.
After installation check all joints for leakage and retighten
where necessary.
OPERATION INSTRUCTIONS
HOW TO USE BELL & GOSSETT CIRCUIT SETTER
BALANCE VALVES FOR PRE-SET FLOW BALANCING
All Circuit Setter Balance Valves within a common zone, circuit, or system, with a common pump, are brought into
balance with each other by establishing a common BALANCE
GOVERNING HEAD LOSS as noted.
1. Identify the zone within a given circuit or circuit within a
given system with the highest head loss.
2. Establish the value of the head loss in feet of water.
3. Establish the corresponding required GPM.
4. Select the appropriate size Circuit Setter Balance Valve
(normally line size) for the required GPM.
5. Using Side #1 of the V91483 Circuit Setter Balance Valve
Calculator, set the degree of closure hairline in the red section of the Calculator over the 0° setting for the appropriate size Circuit Setter and read the head loss opposite
the required GPM. The setting for this Circuit Setter will
remain 0°.
6. Add the head loss in Step “5” to the head loss in Step “2”
to establish the Balancing Governing Head Loss for the
zone or circuit.
7. Subtract the required head loss for each zone circuit from
the Balance Governing Head Loss in Step “6” to establish
the head loss difference for each zone or circuit which is to
be brought into balance with Step “6”.
8. The head loss difference in Step “7” and the required GPM
in Step “3” are lined up in the white section of Side #1 of
the Calculator and the degree of closure for the specific
Circuit Setter Balance Valve is shown under the degree of
closure hairline in the red section of the Calculator for the
appropriate size Circuit Setter.
9. Adjust the Circuit Setter by turning the red knob by hand
on sizes
1
/2" thru 1", or by placing a wrench on the wrench
flats provided on sizes 1
1
/4" thru 21/2" to the set position
determined by the preceding procedure.
NOTES:
• Head loss in Steps “6” and “2” are a fixed head requirement the zone, circuit, or system pump, as required, must
overcome.
• Refer to the G95872 pre-wired tag packaged with the
Circuit Setter Balance Valve and fill in the appropriate
information. Attach the tag to the Circuit Setter for future
reference.
HOW TO USE BELL & GOSSETT CIRCUIT SETTERS
TO PROPORTIONAL BALANCE A SYSTEM
1. Open fully all Circuit Setters on a single pump system.
2. If more than one branch circuit is used, start the balance
procedure by reading all of the flows to the units in a
branch. Each unit (coil) should have its own Circuit Setter
for flow balancing. Using Bell & Gossett RP-250B readout
probes, sequentially attach a Bell & Gossett differential
pressure readout kit to the readout valves on each Circuit
Setter Balance Valve.
3. Using Side-2 of the Bell & Gossett Circuit Setter Balance
Valve Calculator, with the top hairline set on zero for the
size Circuit Setter being read, read the flow corresponding
to the pressure drop read with the readout kit.
2
WARNING: Use of improper procedures to sweat
valve model with union connection into system can
damage valve. Before installing sweat union connection to
valve, remove the union nut and O-ring from the valve
body, then union tailpiece with union nut must be sweated
(soldered) into place. Make sure the O-ring is reinstalled.
Failure to follow this instruction could result in property
damage and/or moderate personal injury.
CAUTION: The use of PTFE impregnated pipe
compound and PTFE tape on pipe threads provides
lubricity. Care should be taken to prevent overtightening
which may damage the valve body. Failure to follow these
instructions can result in moderate personal injury and/or
property damage.
CAUTION: Heat associated with the use of silver
solder may damage a Circuit Setter valve and void
product warranty. Do not use silver solder. Failure to follow
this instruction could result in property damage and/or
moderate personal injury.
CAUTION: Excessive use of solder or flux may result
in damage to the shutoff valve seat and ball. Do not
use excessive solder or flux. Failure to follow this instruction
could result in moderate personal injury and/or property
damage.
WARNING: It is possible, depending on the age or
condition of the stem seal, for some liquid to escape
during Circuit Setter adjustment. Do not have eyes or face
on a level with the sides of the Circuit Setter. Failure to follow this warning could result in serious personal injury.
WARNING: Hot water leakage can occur from read-
out valve during probe insertion and during hookup of
readout kit. Follow the instruction manuals supplied with
readout probes and readout kit for safe use. Failure to follow this instruction could result in serious personal injury
and/or property damage.
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