Vogt P18FXT User Manual

10TA Service Manual
SERVICE OPERATIONS
7/1/14
9-5
Head Pressure The head pressure should be maintained at 190-210 psig for R-22 and 230-250 psig
for R-404a during the freeze cycle. This pressure can be checked at the test connection in the high
pressure line near the high-low pressure switch.
Water-Cooled Units A water regulating valve (FIGURE 9-5A) located in the condenser water inlet
line is used to control the water flow through the condenser. This valve should be adjusted to
maintain a head pressure of 200 psig for R-22 and 235 psig for R-404a. Increasing the water flow
lowers the head pressure and decreasing the water flow raises the head pressure. The valve is
adjusted during the factory test. The valve stem should not be opened as far as it will go or the valve
will not close fully when the head pressure drops below its setting.
Air-Cooled Units The condenser fan switch mounted to the frame (lower right side) (FIGURE 9-
5B) (CPS) is used to regulate the head pressure. This is an adjustable pressure switch located on the
right-hand front of machine. It controls the operation of the condenser fan motor(s) through a
contactor (FC) (FIGURE 6-2) located in the control panel. The switch is set to cycle the fan
motor(s) “On” at 210 psig and “Off” at 190 psig for R-22 and “On” at 250 psig and “Off” at 230
psig for R-404a. Higher settings may be necessary for 0°F and below ambient conditions to assure
there is enough warm gas for ice harvesting.
FIGURE 9-5A FIGURE 9-5B
Water Regulating Valve Condenser Fan Switch
Condenser Cleaning See “Water Cooled Condensers”, “Maintenance”, Section 7.
Air-Cooled Condenser Visual inspection will indicate if dirt is accumulating and clogging the fin
face of the condenser. A vacuum cleaner, compressed air or a brush may be used to remove an
accumulation of dirt from the fin section of the condenser.
Vogt Part #: 12A4200E1401
Vogt Part #: 12A2117F05
ADJUSTING STEM
SET AT 200 PSI (R-22)
SET AT 235 PSI (R-404A)
(CW LOWERS SETTING)
CONNECTED TO
COMPRESSOR DISCHARGE
CUT IN ADJUSTING SCREW
SET AT 210 PSIG (R-22)
SET AT 250 PSIG (R-404A)
(CW LOWERS SETTING)
CUT OUT ADJUSTING SCREW
SET AT 190 PSIG (R-22)
SET AT 230 PSIG (R-404A)
(CW RAISES SETTING)
CONNECTED TO
CONDENSER
CE Approved machine
Vogt Part #: 12A2117F05CE

Vogt P18FXT Specifications

General

Brand	Vogt
Model	P18FXT
Category	Ice Maker
Language	English