Bell & Gossett V58045B Circuit Setter Plus MC - Manual (Page 3)

4. Calculate the ratio of the actual flow to the design flow for
each unit in the branch. This is the proportional flow rate.
(Actual flow divide by design flow.)
5. Select the Circuit Setter with the lowest proportional flow
rate. This Circuit Setter is left in the full open position.
Every other Circuit Setter in the branch is then reset to the
same proportional flow rate.
6. If there are additional branches, repeat the steps in 3, 4
and 5 above for each branch.
7. After all branches have been proportionately balanced,
measure the full open flows on the Circuit Setters installed
on the risers. Calculate the proportional ratio of each riser
Circuit Setter and select the one with the lowest propor-
tional ratio. This Circuit Setter is left fully open and the
other riser Circuit Setters are adjusted to this same ratio as
described in (5) above.
8. Adjust pump flow so that circuits are receiving their design
flow. This can be accomplished by adjusting a Circuit
Setter Balance Valve installed on the pump discharge or by
changing the pump impeller size.
HOW TO USE BELL & GOSSETT CIRCUIT SETTER
BALANCE VALVES AS FLOW METERS
1. Energize the zone, circuit and/or system pump(s) as
applicable.
2. Using Bell & Gossett Model RP-250B Readout Probes,
sequentially attach a Bell & Gossett differential pressure
readout kit to the readout valves on each Circuit Setter
Balance Valve.
3. Read the differential pressure across the orifice of the
Circuit Setter Balance Valve.
4. Using Side #2 of the Circuit Setter Balance Valve
Calculator, set the hairline over the degree of closure as
indicated by the part of the red plastic knob or indicator
plate parallel to the degree of closure noted on the calibra-
tion plate, and read actual GPM flowing through the Circuit
Setter opposite the gauge reading head loss noted in the
white section of Side #2.
NOTE:
• 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 these instructions to
obtain the actual GPM for the system liquid.
HOW TO USE BELL & GOSSETT CIRCUIT SETTER
BALANCE VALVES AS AN ISOLATION VALVE
1. Move the adjustment knob or stem until the position indi-
cator aligns with the closed position on the calibration
plate.
2. Close the isolation valve on the other side of the equip-
ment to be serviced.
3. Open the drain valve to drain the system between the
Circuit Setter and the second isolation valve.
HOW TO USE THE MEMORY STOP FEATURE
1. Make the final degree of closure setting.
2. Loosen the memory stop locking screw in the slot on the
top of red knob.
3. Slide the memory stop screw in the slot (counter-clockwise
for 1 / 2 " - 1" sizes and clockwise for 1 1 / 4 " thru 2 1 / 2 " sizes)
until the screw stops.
4. Tighten the memory stop screw.
SERVICING INSTRUCTIONS
Periodically inspect the Circuit Setter for signs of leakage or
corrosion.
INSULATION
Bell & Gossett recommends that insulation be attached to the
Circuit Setter after the system has been balanced and
G95872 tag (with properly filled in information) has been
wired to the Circuit Setter.
NOTE:
• Tape or other acceptable means should be used to secure
the insulation to the Circuit Setter Balance Valve.
3
IMPORTANT: If a high degree of throttling of flow at
pump discharge is required, Bell & Gossett recom-
mends that the pump impeller be sized to produce design
flow. This will reduce electrical energy consumption.
WARNING: Hot water leakage can occur from read-
out valve during probe insertion and during hookup of
readout kit. Follow the instruction manual a supplied with
readout probes and readout kit for safe use. Failure to fol-
low this instruction could result in serious personal injury
and/or property damage.
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, Circuit Setter must be isolated from the system and
replaced. Failure to follow these instructions could result in
serious personal injury or death and property damage.
WARNING: Corrosion or leakage is indication that
the Circuit Setter must be replaced. Failure to follow
these instructions could result in serious personal injury or
death and property damage.