When ordered with a new meter, the optical vapor eliminator is mounted atop a strainer on the inlet side of the meter. An example is the meter with high-capacity strainer, two-stage valve, and Lectro-Count LCR-II® Electronic Register shown in the Figure 6.

A vent line must be connected from the output port of the optical vapor eliminator. This connection is ½” NPT. The vent line must be connected to an appropriate receptacle on a supply or storage tank.

The optical vapor eliminator solenoid valve and optical sensor are supplied pre-wired to the Lectro-Count Electronic Register.

RELIEVING INTERNAL PRESSURE

All internal pressure must be relieved to zero pressure before disassembly or inspection of the strainer, vapor eliminator, any valves in the system, the packing gland, and the front or rear covers.

Serious injury or death from fire or explosion could result in performing maintenance on an improperly depressurized and evacuated system.

Strictly follow this procedure Relieving Internal Pressure Procedure for LPG and NH3 Meters:

1.Close the belly valve of the supply tank.

2.Close the valve on the vapor return line.

3.Close the manual valve in the supply line on the inlet side of the meter. If no manual valve exists on the inlet side, consult the truck manufacturer for procedures to depressurize the system.

4.Slowly open the valve/nozzle at the end of the supply line.

5.After product has bled off, close the valve/nozzle at the end of the supply line.

6.Slowly crack the fitting on top of the differential valve to relieve product pressure in the system. Product will drain from the meter system.

7.As product is bleeding from the differential valve, slowly reopen and close the valve/nozzle on the discharge line. Repeat this step until the product stops draining from the differential valve and discharge line valve/nozzle.

8.Leave the discharge line valve/nozzle open while working on the system.

Step 1 - Remove Old Vapor Eliminator and Baffel Cup

After the internal pressure has been relieved from the system and the assembly drained of liquid, remove the four bolts and washers used to fasten the old vapor eliminator to the top of the strainer. Inspect the O-ring and replace if necessary.

Step 2 - Mount the Optical Vapor Eliminator

Depending on the strainer being used, the optical vapor eliminator may be fastened to the strainer/vapor eliminator in any of four 90° rotational increments. Select the most suitable orientation for ease of final installation of wiring and vent piping.

Fasten the optical vapor eliminator to the strainer using the four bolts and washers. Tighten the bolts to a torque of 27 lbf-ft (37 Nm).

Step 3 - Connect the Control Piping/Tubing for LPG

Make plumbing connections from the 3-way solenoid valve assembly to vapor eliminator and differential valve assembly. Follow the lettered designations in Figure 10.

Step 4 - Wire the Solenoid and Sensor to the Register

The wiring instructions are given in below.

WARNING

Incorrect wiring can damage the optical sensor.

For North American Installations, the installation must be fully in accordance with the National Electrical Code (US) or the Canadian Electrical Code respectively to maintain the hazardous location ratings on the product. This may involve using rigid conduit for all connections.

The electrical installation of the optical vapor eliminator includes connecting the S3 solenoid and the optical sensor to the LectroCount register.

The optical sensor has a 24” cable potted to the inside the optical sensor assembly at one end. The other end of the cable has a threaded cord grip that fastens into the back of the LectroCount® register.

The S3 solenoid-operated valve requires a 12 AWG, two-wire, braided cable, approximately 24 to 36” in length.

Step 1 - Remove Cable Plug

Loosen and remove the screw from the cover of the S3 solenoid valve cable plug. Remove the cable plug from the solenoid valve coil. Remove the cover from the cable plug housing and then remove the terminal block. Be sure to note its orientation in the housing. Leave the flat gasket in place on the coil.

Step 2 - Connect Cable to Cable Plug

Route one end of the cable through the conduit fitting and into the cable plug housing. Connect the cable wires to the terminal block. Connect the BLACK wire to Terminal 2 and the RED wire to Terminal 1. These indicators are marked on the terminal block.

Step 3 - Reassemble Cable Plug

Reinstall the terminal block into the cable plug housing in the same orientation you found it. Tighten the strain relief strap inside the cable plug using the two screws. Tighten the cable gland on the bottom of the cable plug so that it seals around the cable.

Reconnect the cable plug to the coil. Place the cover over the cable plug and fasten with the screw to a torque of 8.8 in-lbs (1 Nm).

Step 4 - Connect to Lectro-Count Electronic Register

Route the cables from the optical sensor and solenoid valve to the back of the Lectro-Count register. Connect these to two open ports on the back of the register using the appropriate connectors.

LC3 Wiring

LCR Wiring