10
EMR
3
- Truck Installations
EMR4 Truck Installation 3-Way Safety Valve for Truck LP Gas Systems
3. Using the wire nuts, connect the stripped wires from the IB box to the 3-way valve wires (see Figure 5). There
i
s no polarity to the 3-way valve’s wiring. Seal the wire nuts with epoxy sealant using one bag for both wire nu
t
conn
ections and place bag in junction box (see Figure 5).
Epoxy sealant is irritating to eyes, respiratory system, and skin. Can cause allergic skin
reaction. Contains: epoxy resin and cycloaliphatic epoxycarboxylate. Precautions: Wear
suitable protective clothing, gloves, eye, and face protection. Use only in well ventilated
areas. Wash thoroughly before eating, drinking, or smoking.
Figure 5. Connecting 3-Way Valve To Neptune Meter - Truck LP Gas Installations
4. Tighten the cable bushing nuts on the cord grip to ensure a watertight seal at the cable’s entry.
5. Remove the protective closures from the 3-way valv
e ports.
Neptune
meters:
Connec
t a hose from line pressure to port 3 (normally open port) of the 3-way valve (see Figure
5). On some
sy
stems, line pressure is available at an opening in the vapor eliminator housing. Connect another hose
from
t
he 3-way valve’s port 1 (normally closed port) to the air eliminator. Connect a third hose from the 3-
way
valve’s port 2 (co
mmon port) to the differential valve.
L.C./TCS Mete
rs:
Connect a hose from the air eliminator to port 3 (normally open port) of the 3-way valve (see Figure 6). Con-
nect another hose from the 3-way valve’s port 1 (normally closed port) to the strainer cover. Connect a third
hose from the 3-way valve’s port 2 (common port) to the differential valve.
CAUTION
Rigid Metal
Junction Box
Shrink wrapped diode
Shielded 2-Wire Cable
V-R PN 848100-250
Cord Grip
V-R PN 331028-001
Port 1
(N.C.)
Port 3
(N.O.)
Port 2
(COM)
Hose Connections
are 1/4'' NPT
Connect to Line
Pressure
Connect to
Differential
Valve
12 Vdc 10 Watts
3-Way Solenoid Valve
Connect to
Air Eliminator
Connect wires
in IB unit
1/2'' NPT
Nipple or Conduit
758-23.eps
Black
White (+)
To
3-Way
valve
To
IB unit
Red
Red
Wire nuts
Instructions:
NOTE: When temperature is below 50°F (10°C), keep
resin in a warm place prior to mixing (e.g., in an inside
pocket next to body).
1. Attach red wires from 3-way valve to black and white
(+) wire from IB unit with wire nuts as shown in A.
Connect diode white wire to red/white (+) pair.
Connect diode black wire to red/black pair.
2. Open epoxy package, and remove resin pak.
3
. Holding
resin pak as shown in B, bend pak along long
length.
4. As shown in C, firmly squeeze the RED S
IDE of the
resin,
forcing it through the center seal and into
BLACK SIDE.
5.
Mix
thoroughly to a uniform color by squeezing
contents back and forth 25-30 times.
6. Squeeze mixed, warm resin into one end of bag and
cutoff other end.
7. Slowly insert wiring connections into sealing pack until
they fit snugly against the opposite end.
8
. Twist open end of bag and use tie wrap to close it off,
or wrap open end of bag with vinyl electrical tape (not
included) and position the taped end up until the resin
jells.
9. P
lace epoxy pack into junction box and screw on
cover as shown in D.
C
A
D
B
Diode
(+)
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