Viking Pump TSM630.2: LS-QS Universal Seal - Manual (Page 10)

SECTION TSM 630.2 ISSUE I PAGE 10 OF 12
Mark valve and head before disassembly to insure proper
reassembly.
1. Remove valve cap.
2. Measure and record length of extension of adjusting
screw. Refer to “A” on Figure 12, page 9 and
Figure 13.
3. Loosen locknut and back out adjusting screw until spring
pressure is released.
4. Remove bonnet, spring guide, spring and poppet from
valve body. Clean and inspect all parts for wear or
damage and replace if necessary.
Reverse procedures outlined under Disassembly. If valve
is removed for repairs be sure to replace in same position.
Relief valve adjusting screw cap must always point towards
suction side of pump. If pump rotation is reversed, remove
relief valve and turn end for end.
DISASSEMBLY
ASSEMBLY
If a new spring is installed or if pressure setting of pressure
relief valve is to be changed from that which the factory has
set, the following instructions must be carefully followed.
1. Carefully remove valve cap, which covers adjusting
screw.
2. Loosen locknut (which locks adjusting screw so pressure
setting will not change during operation of pump).
3. Install a pressure gauge in discharge line for actual
adjusting operation.
4. Turn adjusting screw in to increase pressure and out to
decrease pressure.
5. With discharge line closed at point beyond pressure
gauge and pump running, gauge will show maximum
pressure that the valve will allow (full bypass).
In ordering parts for pressure relief valve, always give
model number and serial number of pump as it appears on
nameplate and name of part wanted. When ordering springs,
be sure to give pressure setting desired.
PRESSURE ADJUSTMENT
IMPORTANT
INSTALLATION INSTRUCTIONS:
ASSEMBLY
WARNING !
The pump needs to be properly grounded
before the heat cartridges are installed.
WARNING !
Setting the set point temperature higher
than necessary will not make the pump
heat any faster and will shorten the life of
the heat cartridges.
DANGER !
• Always disconnect, lockout, and tag
out supply circuits prior to installing.
• The installation must comply with
standard and local regulations.
• All wiring should be done by a licensed
electrician to meet local codes.
• Study this manual thoroughly before
installing and using the heat cartridges.
• Pay special attention to this section
and the parts marked “WARNING!” or
“DANGER”.
• Should questions or uncertainties
arise, please contact your authorized
Viking distributor.
Failure to follow these instructions may
cause an electrical shock and/or sparks,
which may result in serious injury or
death.
1. Spacers should be installed between the foot of the
pump and the base. This will create an air gap between
the pump and base to limit heat transfer to the base.
2. Coat the threads of the heat cartridge with an anti-seize
compound prior to installation. Install heat cartridges into
the tapped ports on the head and bracket in the locations
shown in the Figure 13 below. Figure 13 also shows the
minimum clearance around the pump needed to install
and remove the heat cartridges as well as the location
for the thermocouple. The number of heaters used and
the total wattage for each pump size is given in Table
2 below. 3/8” heat cartridges should be tightened to
10ft-lbs. ½” and ¾” heat cartridges should be tightened
to 20 ft-lbs.
3. Viking recommends installing a closed loop temperature
controller with a control algorithm that will minimize or
prevent overshooting the set point temperature. The set
point temperature needs to be slightly higher than the
melting point and significantly lower than the flash point
or boiling point of the liquid being pumped. Viking does
offer a controller for use with our heat cartridges. Ask
your local Viking distributor for details.
4. Properly insulate the pump to minimize heat loss. The
pump will not heat properly if it is not insulated.
This section applies to 124E Series only.
HEAT CARTRIDGES