Bell & Gossett V58583 Circuit Sentry Terminal Kits – AC2YL - Manual (Page 2)

HOW TO USE PRESSURE TAPS
TO MEASURE SYSTEM
OPERATING CONDITIONS
1. Using Bell & Gossett Model RP-250B, readout probes,
attach Bell & Gossett differential pressure readout kit to the
readout valves on the Accessory valve.
2. Read the differential pressure from the coil inlet isolation
valve (typically strainer) to coil outlet isolation valve (typi-
cally flow limiting balancing valve). Differential value should
be between the sum of the coil, and control valve pressure
drop and 60 psi depending upon the amount of control
being exercised by the flow limiting valve function for bal-
ance. Optional pressure reading valves (B&G P/N V58050)
may be installed in the barrel of the strainer, flow limiting
valve or union connection for the coil for a more discrete
reading if desired. Valves should be installed with coil and
barrels isolated and drained.
GENERAL INFORMATION
For installing Sweat Connections:
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) solder and a good
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.
e) Check the soldered connection for leaks.
For installing NPT connections:
Apply pipe compound conservatively to male connecting fit-
tings only. After installation check all joints for leakage and re-
tighten where necessary.
AUTOMATIC FLOW LIMITING VALVE
DESCRIPTION
Low Flow AC valve is designed to automatically control the
flow in piping systems to selected preset limit. As pressure
differential increases, a cartridge inside the valve body
reduces the flow area to accurately maintain the preselected
flow rate.
Flow Operating Range: 0.25 – 3.8 GPM
INSTALLATION INSTRUCTIONS
1. The Automatic Flow Limiting Valve must be installed on the
return side of the coil with union end on the upstream side
and fixed end on the downstream side of the flow.
2. Install the unit so that the flow arrow on the body housing
points in the direction of flow.
3. Prior to coil commissioning and operating the Flow
Limiting Valve, adjust cartridge to the desired flow rate
between 0.25 GPM to 3.8 GPM.
i. Loosen screw (a) position
ii. Rotate plastic pointer (b) to the desired flow rate.
Increments marked on variable orifice are in GPM.
iii. Re-tighten screw (a) with pointer set at the desired flow
rate.
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.
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.
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 these
instructions can result in moderate personal injury and/or
property damage.
CAUTION: Heat associated with the use of silver
solder may damage valve components and void the
product warranty. Do not use silver solder. Failure to fol-
low these instructions could result in property damage
and/or moderate personal injury.
*Teflon is a registered trademark of E.I. DuPont de Nemours and Company.
WARNING: Damage to the Low Flow AC valve or
failure of solder sealing joints may occur if these oper-
ational limits are exceeded. This can result in water leak-
age. Failure to follow this instruction can cause 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 these instructions could result in serious personal
injury or death and property damage.
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