56 1/12
R-290 Service Procedure
1. All service work must be performed by personnel
qualifi ed to handle fl ammable refrigerants.
2. NO SMOKING
3. Disconnect all power to the unit being serviced.
4. Move the unit to be serviced to a well ventilated
area.
5. Check for leaks using a calibrated Hydro Carbon
leak detector.
6. Keep all electrical equipment and other sources of
ignition back 10’ (two meters).
7. Follow the Recovery/Evacuation procedure above
to repair the refrigeration system.
Filter-Driers
A Multiplex fi lter-drier has high moisture and acid
removal capability.
The size of the fi lter-drier is important. The refrigerant
charge is critical. Using an improperly sized fi lter-drier
will cause the Blended Ice Machine to be improperly
charged with refrigerant.
Drier DML-032S, 1/4” (.64cm) end connection is the
recommended OEM fi eld replacement drier.
Driers are covered as a warranty part. The drier must be
replaced any time the system is opened for repairs.
Total System Refrigerant Charge
This information is for reference only. Refer to the
Blended Ice Machine model/serial number tag to verify
the system charge. Serial plate information overrides
information listed on this page.
Models using R404A refrigerant Air-Cooled
MS-8-1H, MS-8-1LH,
MS-8-AH, MS-8-ALH,
MS-8-EH, MS-8-ELH,
MS-8-FH, MS-8-FLH,
MS000A01, MS000A02,
MS000A03, MS000A04,
MS000A05, MS000A06
12 oz (340g)
MS-8-BH, MS-8-BLH 16 oz (454g)
Models using R290 refrigerant Air-Cooled
MS-8-CH, MS-8-CLH 4.75 oz (135g)
Operating Pressures Chart
Characteristics will vary depending on operating
conditions.
OPERATING PRESSURES
Air Temp.
Entering
Condenser
°F/°C
Discharge Pressure
PSIG/kPa
Suction
Pressure
PSIG/kPa
50/10
70/21
80/27 205-290/1413-1999 48-62/331-427
90/32
100/38
110/43
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