Running Electrical Connections; Plumbing Connections - Stoelting IntelliTec M202 series Operator's Manual

3 Insulate the suction line with a minimum of 3/8" wall
thickness or the wall thickness required by local
code. In humid areas, use thicker insulation. In
areas that are exposed to extreme temperatures,
insulate the liquid line to prevent excessive
sub cooling or heating of the liquid refrigerant.
Fasten all lines securely along ceilings, walls
and roofs. Avoid creating any type of kink in the
lines. The Stoelting/Ross warranty does not cover
malfunctions or capacity issues with equipment
caused by kinks in the line sets.
4 Use good piping practices when installing line sets.
Seal the ends of the line sets during installation to
prevent exposure to the atmosphere and foreign
objects. Blow the lines out with dry nitrogen to
remove any debris that might be in the line sets.
When running line sets through a wall or roof,
mark the lines to eliminate confusion as to which
line set is running to which cylinder.
Example: Mark the liquid and suction lines with
the respective cylinder number. Facing the front
of the machine, cylinders are numbered left to
right.
5 When brazing the joints, purge dry nitrogen
through the lines to minimize oxidation of copper
inside of the lines. The Stoelting/Ross warranty
does not cover problems with the refrigeration
system that are caused by oxidized material in
the lines.
B. RUNNING ELECTRICAL CONNECTIONS
1 The machine requires a separate electrical
connection for each freezing cylinder. Refer to the
nameplate on the machine for proper electrical
supply. Each freezing cylinder has its own
electrical system and condenser so if one cylinder
fails, the other cylinder will still be operational.
An air-cooled machine needs two circuits for each
freezing cylinder, one for the remote condensing
unit and one for the freezing cylinder.
A water-cooled machine needs one circuit for each
freezing cylinder.
2 The electrical boxes are located behind the lower
front panel. Labels indicate which cylinder each
electrical box powers. No pigtails are supplied
with the machine or condensing unit.
3 If the condensing unit is on the roof or ground,
a quick disconnect box needs to be installed to
provide power.
Owner's Manual #513666
NOTE
4 Do not turn on the power to the machine or
the condensing unit until the refrigeration lines
have been connected and the system has been
charged with refrigerant. Label the circuit breakers
with information regarding which cylinder and
condensing unit the breaker is designated for to
prevent confusion if power ever needs to be shut
off.
5 When connecting power to the machine, run the
line under the machine and through the bottom
of the electrical box. Remove the electrical box
cover by loosening the four screws. The screws
do not have to be removed. Connect the power
to the terminal strip. The terminal strip is labeled
L1, L2, L3, and GND. After connections are made,
place the cover on the electrical box, but do not
tighten the cover (for single-phase machines the
cover can be tightened). The electrical box may
need to be accessed when checking for proper
rotation of the motor.
C. PLUMBING CONNECTIONS
1 On water-cooled machines, the water inlet is a
standard garden hose connection and the water
outlet is 5/8" OD copper tubing. The connections
are located at the back of the machine. Remove
the rear panel to access the connections. Run
the plumbing under the machine frame. Water-
cooled machines use approximately 3 gallons of
75°F water per minute when the compressor is
operating. The machine does not use any water
when not in use.
2 The machine is equipped with a dipping trough
that requires a water inlet line and a drain line.
The water inlet has 1/2" NPT close nipple fi tting.
Install a shutoff valve in the water inlet line. The
drain connection is 1-1/2". Run a drain line from
the trough to a drain on the fl oor. Leave enough
slack in the drain line so that the lower front panel
can be easily removed for service.
4 M202B Model Machines