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WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced, flame safe-
guard control technician.
4. After installation is complete, check out product op-
eration as provided in these instructions.
CAUTION
1. Turn off gas supply before starting installation.
2. Disconnect power supply before beginning in-
stallation to prevent electrical shock and equip-
ment damage.
MOUNTING
Electric motorized valves of this type should not be
installed in poorly ventilated pits or confined spaces for
control of combustible gas flow. The valve body may be
installed in any position provided the motor shaft is horizon-
tal. Allow sufficient clearance for assembling the motor and
linkage, and for general servicing. See Fig. 2 for installation
dimensions.
PIPING
The valve body may be piped either by screwing directly
to the pipe or by using close nipples and companion flanges.
The pipes must be in exact alignment to avoid distorting the
valve body. Ream and clean pipes carefully, and apply pipe
dope to the male threads only. Leave the first two threads free
of dope.
INSTALLING ELECTRIC MOTOR AND Q100A
LINKAGE ON V51E (FIG. 4)
Any special parts, nuts, or screws needed are furnished in
bag assemblies. Install the motor and linkages as follows:
1. Mount plate on stop bracket with three No. 10 screws
and lock washers.
2. Mount motor on plate with four 1/4 in. screws, lock
washers, and nuts.
3. Remove motor crank arm assembly from motor and
discard it.
4. Install the special crankarm in position shown. With
crankarm tight against shoulder of shaft, tighten clamp screw
securely.
5. One end of the link measures 1-1/4 in. [31.8 mm]
from end to bend. Slip this end over the drive pin. Place
washer on drive pin. Insert cotter pin in the drive pin and
spread cotter pin ends.
6. Slip the other end of the link into the forked end of the
actuating arm and insert the linkage pin moving the arm as
necessary. Insert cotter pin into the linkage pin and spread
cotter pin ends.
Fig. 4—Typical combination of V51E, Modutrol
Motor, and Q100A Linkage Assembly.
CLAMP SCREW
LINKAGE PIN
ACTUATING
ARM
Fig. 5—Typical combination of V51E, Modutrol
Motor, and Q100B Linkage Assembly.
M9534
INSTALLING MODUTROL MOTOR AND Q100B
LINKAGE ON V51E (FIG. 5)
Special parts needed for the basic assembly are furnished
in bag assemblies. Special linkages for the valve arm to
operate dampers, auxiliary valves, or other equipment can be
5
INSTALLATION
Installation
CRANK ARM
DRIVE PIN
LINK
MOUNTING
PLATE
STOP
BRACKET
OPERATING
LEVER
LOCATED
BEHIND
STRAIN
RELEASE
STRAIN
RELEASE
SPRINGS (2)
M9535
LINKAGE
ROD
CRANK
ARM
UPPER
BALL JOINT
MOUNTING
PLATE
STOP
BRACKET
VALVE
ACTUATING
ARM
STRAIN
RELEASE
SPRINGS
LOWER
BALL JOINT
60-2102—7
V51E
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