Liquid Controls LCR-II Installation E3655-E3656 - Manual (Page 19)

19
valves
A2847-11 Solenoid-Operated
Block Valve
Single Stage (S1) Block Valve
S1 Solenoid
LectroCount LCR-II
Gallons
Electro-Pnuematic
Preset Valve
Single Stage Electro-Pnuematic
Valve with V-7 Valve
S1 Solenoid
V-7 Valve Electro-Pnuematic
Actuator
LectroCount LCR-II
Gallons
A2859-11 Block Valve
and 3-Way Solenoid
Single Stage
3-Way Valve
single stage systems
liquid Controls’ valves overview
When ordered as part of a meter system with a LCR-II,
Liquid Control’s control valves are bolted onto the meter
and wired to the LCR-II at the factory. Electronic control
valves can also be ordered separately and retrofit onto
meter systems already in service. These valves will need
to be piped and wired in the field. For piping instructions,
refer to the valve manual. This manual includes wiring
instructions for the valves.
In order to control flow, the LCR-II energizes and de-
energizes solenoid-operated valves on external bypass
piping routed off the main product flow. The solenoid
operated valves close off and open the bypass pipes.
The bypass pipes redirect some of the product flow
in order to open and close the control valve. These
solenoid-operated valves must be wired to the LCR-II
CPU board during installation.
Liquid Controls offers single stage and two stage
electronic valves. Single stage valves have one solenoid
valve (S1) and two positions—an open position and a
closed position. Two stage valves have two solenoid
valves (S1 & S2) and three positions—open, closed, and
dwell flow. Dwell flow is a low flow rate setting controlled
by the S2 solenoid and initiated shortly before the
register reaches a preset value.
sInGle sTaGe valves
The three most common Liquid Controls meter systems
with single stage valves include a block valve with a
S1 solenoid-operated valve fitted onto external piping
(A2847-11), a block valve (A2843) with a 3-way solenoid,
and an electro-pnuematic valve with an S1 solenoid.
A2847-11 Valve
This single stage control valve has a S1 solenoid-
operated valve located at the meeting point of three
external pipes: one pipe from the inlet side of the valve,
one from the top of the block valve, and one from the
outlet side of the valve. This valve is typically used in
refined fuels applications.
A2843 Valve and 3-Way Solenoid
The 3-way solenoid-operated valve—mounted directly
to the top center port on the back of the LectroCount
LCR-II—serves as a S1 solenoid-operated valve. The
3-way solenoid-operated valve is located at the meeting
point of two pipes from the vapor eliminator (one for
eliminated vapor and one leading to the spit tank) and
one pipe to the top of the block valve. 3-way solenoid-
operated valves are typically specified for products that
hold vapor in the line such as LPG and NH
3
.
The LCR-II is also compatible with many other brands
and types of valves.