Bell & Gossett V58766 Triple Duty Valve Model 3DV - Manual (Page 2)

d) When sweating the joints, first adjust 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.
e) Check the soldered connection for leaks.
2. For installing NPT connections:
Apply pipe compound conservatively to male connecting
fittings only.
After installation check all joints for leakage and retighten
where necessary.
OPERATION INSTRUCTIONS
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 3DV.
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. Failure to follow this instruction could
result in property damage and/or moderate personal injury.
© COPYRIGHT 2006
PRINTED IN U.S.A. 7-06
Bell & Gossett
8200 N. Austin Avenue
Morton Grove, IL 60053
Phone: (847) 966-3700
http://www.bellgossett.com
3. Read the differential pressure across the orifice of the 3DV.
4. Use the differential pressure chart (shown below) to read
actual GPM.
Example: The 3DV model 1" NPTF. If the differential pres-
sure across the orifice reads at 40' W.C. the flow rate is
20 GPM.
HOW TO USE THE MEMORY STOP FEATURE
1. Make the final degree of closure setting.
2. Loosen the handle nut and rotate memory stop until it
locks against the body.
3. Tighten the handle nut.
SERVICE INSTRUCTIONS
Periodically inspect the 3DV for signs of leakage or corrosion.
PERFORMANCE CHARACTERISTIC CURVE
(NOTE: Flowmeter Cv for Balancing)
CAUTION: Heat Associated with the use of silver
solder may damage a Venturi/Ball valve and void the
product warranty. Do not use silver solder. Failure to follow
these instructions could result in property damage and/or
moderate personal injury
CAUTION: The use of Teflon ® * impregnated pipe
compound and Teflon 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: Make sure that all the connecting pipework
is water tight.
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 these instructions could result in serious personal
injury or death and property damage.
CAUTION: When making the water connections, make
sure that the pipework connecting the 3DV is not
mechanically over-stressed. Over time this could cause
breakages, with consequent water losses which, in turn,
could cause harm to property and/or people.
CAUTION: Water temperatures higher than 100°F
(38°C) can be dangerous. During the installation,
commissioning and maintenance of the 3DV, take the
necessary precautions to ensure that such temperatures
do not endanger people.
WARNING: Corrosion or leakage is indication that
the 3DV must be replaced. Failure to follow these
instructions could result in serious personal injury or death
and property damage.
CAUTION: Excessive use of solder in a vertical instal-
lation may result in damage to the valve seat and ball.
Do not use excessive flux. Failure to follow these instruc-
tions could result in property damage and/or moderate
personal injury.
*Teflon is a registered trademark of E.I. DuPont de Nemours and Company.
1000
100
10
40
1
0
0 0 0 1 0 0 1 0 2 0 1 1 0
SS
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P
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W F
O
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EF
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ET
A
CAPACITY (GPM)
Cv Reference Line
1" 2" 1-1/4" 1-1/2"