7
307-928
CONVERTING THE PUMP TO A HEATED CIRCULAT-
ING SYSTEM
To convert pump Models 224-625 or 231-163 to a heated
circulating unit, order the following:
Viscon
Fluid Heater, Model 220-522
Heater Mounting Kit 222-262
Circulating Kit 222-261
Hose Kit 222-263
WARNING
The Viscon
Heater must be installed by a quali-
fied electrician in compliance with all state and lo-
cal codes and regulations, to reduce the risk of
electric shock or other serious bodily injury during
installation or operation.
The heater requires a 120 VAC, single-phase,
16.7 Amp power supply. Refer to the Viscon
Heater Manual, 307-805, for further information.
DO NOT plug or unplug the power cord in any area
containing flammable materials or fumes, to avoid
fire or explosion resulting in serious bodily injury.
Installing Heater Mounting Kit 222-262
WARNING
Before installing the heater, heater mounting kit
and circulating kit, follow the Pressure Relief Pro-
cedure on page 2. Disconnect all hoses from the
pump.
NOTE: Reference numbers marked with an asterisk (for
example, 61*) are included in kit 222-262.
Apply 110-110 pipe sealant (included in the kit) to
all male threads, except at swiveling connec-
tions.
1.
Remove the cover from the electrical box (G) at the
back of the heater. Screw the bushing (66*) into the
inlet of the electrical box. Install the cord grip elbow
(67*) in the bushing. See Fig. 3.
2.
Thread the cord (68*) through the elbow (67*) and
into the electrical box. Attach the black lead to the
leftmost terminal, the white lead to the center termi-
nal, and the green ground wire to the rightmost termi-
nal. Tighten all terminal nuts to 30 in-lb (3.4 N.m).
Tighten the nut on the cord grip elbow (67*) to secure
the cord. See Fig. 3.
WARNING
The electrical cord (68*) is rated for 105
C
(221
F). Do not substitute a lower temperature
rated, generally available cord.
NOTE: Mount the heater (58) on the back of the cart as
follows. Two people are required to perform this
operation.
3.
Align the heater (58) mounting posts with the four
holes at the back of the cart’s pump support bracket
(H). See Fig. 4. Secure the heater to the bracket with
the M8 x 1.25 screws and lockwashers supplied with
the heater.
4.
Remove the fluid filter (32) from the pump (33). Re-
move and discard the two elbows (17), check valve
(30), and long 3/8 npt nipple (39) from the pump fluid
outlet. See Fig. 2.
Refer to page 8 to continue the procedure.
0867
Fig. 3
G
GREEN (GROUND)
WHITE
BLACK
67*
68*
TIGHTEN TERMINAL NUTS
TO 30 in-lb (3.4 N.m)
66*
