Vollrath Stoelting E111I, Service Manual

Page: 38 / 61

32
E. Remove the clamps from the water lines at the
valve.
F. Remove the two screws holding the water valve to
the frame and remove the valve.
WATER VALVE REPLACEMENT
To replace the water valve, perform the following proce-
dures:
A. Position the water valve and attach to the frame
using the two screws.
B. Install the water lines onto the valve with hose
clamps.
C. Leave the suction and discharge ports open to
prevent pressure buildup during water valve
installation.
D. Braze the capillary tube into the system using
appropriate brazing material.
E. Connect the water supply line and turn on the water
supply.
F. Check for leaks in the water lines. If there are no
leaks, turn off the water supply.
G. Replace the filter drier. Refer to Section 5.8 for
details.
H. Evacuate and recharge system per instructions in
Section 5.2.
I. Turn on the water and check for leaks in the water
lines with the refrigeration system running.
J. Adjust the valve as necessary.
5.8 SOLENOID
Solenoid valves are installed on the liquid and suction line
of the freezing cylinder evaporator and on the liquid line of
the hopper evaporator (Refer to Figures 5-9 and 5-10). A
solenoid valve has a magnetic coil that, when energized,
lifts a plunger and allows refrigerant to flow. The solenoids
are activated by the IntelliTec control and determine which
evaporator receives refrigeration.
The suction line solenoid prevents refrigerant flow in the
evaporator when the suction pressure drops due to the
operation of the other evaporators in the system.
ACTIVATING THE SOLENOID VALVES
A. Turn the Main Power OFF/ON switch to the OFF
position.
B. Locate the compressor contactor behind the right
panel and disconnect the gray wire #47.
C. Wrap electrical tape around wire to insulate it.
D. Remove the belt from the pulley to allow drive motor
to spin freely.
E. Connect power to the machine.
F. Turn the Main Power OFF/ON switch to the ON
position.
G. Press the Push To Freeze button on the IntelliTec
control. This will energize the solenoid valves.
SOLENOID TESTING
When activated, a solenoid coil produces a magnetic field.
This field can be detected by placing the tip of a metal
screwdriver close to the retaining screw on the solenoid
coil. The retaining screw will like as a magnet and pull on
the screwdriver tip. Additionally, the solenoid will make a
clicking sound when activated.
SOLENOID MAGNETIC COIL REMOVAL
A. Remove the side panel.
B. Disconnect the electrical wires.
C. Remove the retaining screw from the top of the
solenoid and pull the magnetic coil off.
SOLENOID MAGNETIC COIL INSTALLATION
To replace the magnetic coil, perform the following proce-
dures:
A. Connect the two electrical wires to the magnetic
coil.
B. Push the coil on to the solenoid valve stem.
C. Make sure there isn’t any foam insulation between
the valve coil and valve body. Trim any excess
insulation.
D. Install the retaining screw onto top of coil.
SOLENOID VALVE REMOVAL
A. Recover refrigerant charge per instructions in
Section 5.2.
Figure 5-9 Liquid Line Solenoid Valve
Figure 5-10 Suction Line Solenoid