Read these instructions carefully. Failure to follow the
intructions could damage the product or cause a
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
The installation has to be carried out by qualified
Carry out a thorough checkout when installation is
Turn off gas supply before installation.
Disconnect power supply to the valve actuator
before beginning the installation to prevent
electrical shock and damage to the equipment.
Do not remove the seal over valve inlet and outlet,
until ready to connect piping.
The valve must be installed so that the arrow on
the valve points in the direction of the gas flow
(gas pressure helps to close the valve).
The gas valve can be mounted plus or minus 90 degrees from
The distance between the gas valve and the wall/ground,
must be at least 30 cm.
Main gas connection
1. Take care that dirt does not enter the gas valve during
2. Remove the flanges from the valve.
3. Use a sound taper fitting with thread according to
ISO 7--1 or new, properly reamed pipe free from swarf.
4. Apply a moderate amount of good quality thread
compound to the pipe for fitting only, leaving the two
end threads bare, PTFE tape may be used as an
5. Screw the flanges onto the pipes.
6. Ensure that the inlet and outlet flanges are in line and
separate from each other enough to allow the valve to
be mounted between the flanges without damaging the
7. Place the O--ring. If necessary grease it slightly to keep
it in place.
8. Mount the gas valve between the flanges using the
bolts for each flange.
9. Complete the electrical connections as instructed in the
Electrical Connection section.
Tightness test after installation
Spray all pipe connections and gaskets with a
good quality gas leak detection spray.
Start the appliance and check for bubbles. If a
leak is found in a pipe connection, remake the
A gasket leak can usually be stopped by
tightening the mounting screws. Otherwise,
replace the gas valve.
Switch off power supply before making electrical
All wiring must comply with local codes, ordiances
Use lead wire which can withstand 105 °C ambient.
The electric ON/OFF operator is provided with a terminal
block for electrical connections.
Follow the instructions supplied by the appliance
manufacturer. Refer to Fig. 3. and Fig.
Fig. 3. Three pin electrical plug connector according to
Fig. 4. Connection diagram VQ400