Red Seal Measurement Neptune RML2000 - Dual Stage LPG Valve Installation and Wiring

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Connect the white wire to terminal 23 and the black wire to terminal 24 on the register’s POWER 12 VDC
terminal strip (gure 4-13).
Connect the orange wire to terminal 18 (PRESET), and the blue/black wire from the twisted pair to either
black wire from the solenoid valve (there is no required polarity for the solenoid valve) and secured with
the supplied wire nut. The other black wire from the solenoid valve should be connected to terminal 19
(PRESET).
No wires will be connected to terminals 20, 21, and 22 (PRE-WARN). NOTE: The solenoid valve used
must feature a transient voltage suppressor. Check for the TVS to have been previously installed, by Red
Seal, under a section of heat shrink tubing where the two black wires enter the solenoid valve. If the TVS
is not present, contact the factory for additional wiring instructions.
4.11 Installing the Dual-Stage LPG Valve
Install the LPG solenoid valve (rst stage) per section 4.10.
Remove the drain plugs from the dual-stage LPG differential valve (gure 4-11). Verify that the threads on
the valve body are clean and undamaged.
Apply a pipe sealer (approved for LPG service) to the NPT threads on the 90 degree elbows. Caution:
Make sure that sealant does not enter tubing as this may damage the solenoid valve. Install the two
90 degree elbows in the differential valve body. Install the tubing/solenoid valve assembly, aligning the
elbows as shown. Securely tighten the tube ttings.
4.12 Wiring the Dual Stage LPG Valve
Install two straight conduit nipples, supplied with the valve kit, in the threaded electrical opening of each
solenoid valve. Teon tape should be used on the threads of the conduit nipples to make a watertight seal.
Run the two black wires from the main valve through the factory supplied conduit, into the register using
the conduit hub at the left side of the rear of the register. Teon tape should be applied to the threads of
the 90 degree conduit nipple before it is inserted in the conduit hub.
Remove the center hole plug from the E4000 register base and install the supplied 90 degree conduit
nipple in the center port at the rear of the register. A supplied rubber gasket should be installed over the
Figure 4-11. LPG Dual-Stage Valve Assembly