Bell & Gossett G95858H Circuit Setter Plus “RF” Balance Valves - Manual (Page 2)

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INSTALLATION INSTRUCTIONS
1. To retain calibrated accuracy, a minimum length of unre-
stricted straight pipe equivalent to 3 pipe diameters
upstream and 1 pipe diameters downstream must be main-
tained immediately adjacent to the Circuit Setter Balance
Valves.
2. Circuit Setter Balance Valves are bi-directional and can be
installed in most positions. However, they should be
installed in a position to facilitate balancing of the system.
IMPORTANT:
Bell & Gossett Circuit Setter Balance Valves are not rec-
ommended for use with meter connections pointing
down. Dirt can collect in the connections and foul up the
readout valves and readout meters.
3. Circuit Setter Balance Valves are equipped with a 1 /
4
" NPT
plugged drain port. If the drain port is to be used to drain a
riser on the downstream side of a terminal unit, the drain
port should be situated on the terminal unit side of the riser
when installing the Circuit Setter.
4. Use a torch with a sharp pointed flame.
5. Clean tube ends and Circuit Setter connections thoroughly.
6. Use 95-5 (Tin-Antimony) solder.
7. When sweating the joints, first wrap the valve body with a
cool wet rag, then direct the flame with care to avoid sub-
jecting the Circuit Setter to excessive heat. Allow the valve
body to cool below 200°F before installing the (2) Model
RV-125A Readout Valves packaged with the Circuit Setter
Balance Valve.
8. Check soldered connections for leaks. If resoldering is
required, remove readout valves before applying the torch
to the connection(s).
OPERATING INSTRUCTIONS
HOW TO USE BELL & GOSSETT CIRCUIT SETTER
TO ESTABLISH REQUIRED SYSTEM FLOW
1. Turn the knob by hand to open the Circuit Setter to the “A”
position. Circuit Setter position (amount the Circuit Setter is
open and closed) can be read by the position of the knob
slot/pointer on the nameplate.
2. Energize the Zone, Circuit and/or system pump(s) as applic-
able so that fluid is flowing through the Circuit Setter.
3. Using Bell & Gossett Model RP-250B readout probes,
attach a Bell & Gossett differential pressure readout kit to
the readout valves on the Circuit Setter Balance Valve.
4. Read the differential pressure across the Circuit Setter.
5. Refer to the “A” position pressure drop curve in this manual
for the model Circuit Setter installed and read the flow cor-
responding to the measured pressure drop. The Cv shown
on the curve may also be used to calculate the flow or to read
the flow from scale 5 on the Bell & Gossett System Syzer.
IMPORTANT:
If the system contains a liquid with a specific gravity
and/or viscosity higher or lower than that of water, apply
the appropriate correction factor noted in the Corrective
Factors for Viscosity and Specific Gravity Table to obtain
the actual GPM for the system liquid.
6. If the GPM does not agree with the specified (required)
GPM, close the Circuit Setter accordingly. Repeat steps 5
and 6 until the required results have been achieved.
HOW TO USE BELL & GOSSETT CIRCUIT SETTER
BALANCE VALVES AS AN ISOLATION VALVE
1. Move the adjustment knob until the position indicator aligns
with the closed position on the calibration plate.
2. Close the isolation valve on the other side of the equipment
to be serviced.
3. Open a drain valve to drain the system between the Circuit
Setter and second isolation valve.
CAUTION: Heat associated with the use of silver
solder may damage a Circuit Setter and void the
warranty. Do not use silver solder. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
CAUTION: Excessive use of solder may result in dam-
age to the valve seat and ball. Do not use excessive
flux. Failure to follow these instructions could result in
property damage and/or moderate personal injury.
WARNING: Check for proper sealing when using as
an isolation valve. If the seat is not sealing properly
liquid will continue to flow from the drain valves. In this
case, the Circuit Setter must be isolated from the system
and replaced. Failure to do so could result in serious
personal injury and/or property damage.
WARNING: Hot water leakage can occur from read-
out valves 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 this instruction could result in serious personal injury
and/or property damage.