Welbilt FB081TF, Service Manual

Page: 85 / 96

Part Number REV00 04/08/2020
85
Section 8 Charts
Section 8
Charts
Total System Refrigerant Charge
This information is for reference only. Refer to the Blend-
In-Cup Beverage System model/serial number tag to verify
the system charge. Serial plate information overrides
information listed on these pages.
n
Warning
Refrigerant type and amount varies by model. Machines
may use R-404A or R-290 refrigerant. Always refer to
model/serial plate to identify refrigerant type and
amount.
n
Warning
Some 50 Hz models may contain up to 150 grams of R-290
(propane) refrigerant. R-290 (propane) is flammable in
concentrations of air between approximately 2.1% and
9.5% by volume (LEL lower explosion limit and UEL upper
explosion limit). An ignition source at a temperature
higher than 470°C is needed for a combustion to occur.
Refer to nameplate to identify the type of refrigerant in
your equipment.
mmortant
Due to continuous improvements, this information is
for reference only. Please refer to the serial number tag
to verify electrical data. Serial tag information overrides
information listed on this page.
Model System Refrigerant
FB081TF
1
(Lower Cabinet)
R404A
8 oz
(226.8 g)
2
(Ice Maker)
FB081TP
1
(Lower Cabinet)
R290
3.53 oz.
(100 g)
2
(Ice Maker)
24-Hour ce Production/ Refrigerant Pressure
Charts
These charts are used as guidelines to verify correct ice
machine operation.
Accurate collection of data is essential to obtain the correct
diagnosis.
• Ice production checks that are within 10% of the chart
are considered normal. This is due to variances in water
and air temperature. Actual temperatures will seldom
match the chart exactly.
• Due to the critical refrigerant amount, verify operational
temperatures with an electronic thermometer. Install
gauges only when necessary.
• All discharge and suction line temperature readings are
taken within 6” of the compressor.
• Low-loss fittings connected directly to the gauge are
required for refrigerant pressure readings. Do not use a
manifold gauge set unless recovering/charging.
• Zero out refrigeration gauges before obtaining pressure
readings to avoid mis-diagnosis.
• Allow system to stabilize for a minimum of 10 minutes,
then verify the temperatures/pressures are within the
ranges indicated.
• Water temperature will affect suction and discharge
temperature/pressure - 50°F (10°C) water temperature
will result in temperatures/pressures on the lower end
of the ranges specified.
90°F (32°C) water temperatures will result in
temperatures/pressures on the upper end of the range
specified.