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Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
Discharge capacitors in a way that won't cause any spark, using a Supco CapDis tool. (The standard procedure to short circuit
the capacitor terminals usually creates sparks.)
Reassemble sealed enclosures accurately. If seals are worn, replace them.
Check safety equipment before putting into service.
Repair
Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with FLAMMABLE
REFRIGERANTS.
Ensure sufficient ventilation at the repair place.
Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
Discharge capacitors in a way that won't cause any spark, using a Supco CapDis tool.
When BRAZING is required, the following procedures shall be carried out in the order indicated:
A) Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside.
Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take
special care that drained refrigerant will not float back into the building.
B) Evacuate the refrigerant circuit.
C) Purge the refrigerant circuit with oxygen-free nitrogen for 5 min. (not required for A2L refrigerants)
D) Evacuate again (not required for A2L REFRIGERANTS).
E) Remove parts to be replaced by cutting, not by flame.
F) Purge the braze point with nitrogen during the brazing procedure at the pressure indicated below.
G) Carry out a leak test before charging with refrigerant at the pressure indicated below.
NOTES:
Reassemble sealed enclosures accurately. If seals are worn, replace them.
Check safety equipment before putting into service.
When BRAZING is required, the following procedures shall be carried out in the following order:
Ensure sufficient ventilation in the work area.
A) Make sure the power to the unit is turned Off.
B) Safely remove the refrigerant following local and national regulations. If the recovery is not required by national
regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt,
one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.
C) Purge the refrigerant circuit with oxygen free nitrogen.
D) Evacuate the refrigerant circuit.
E) Purge the refrigerant circuit with oxygen-free nitrogen for 5 min.
F) Evacuate again.
G) Remove parts to be replaced by cutting or brazing.
H) Purge the braze point with nitrogen during the brazing procedure required for repair.
I) Carry out a leak test before charging with refrigerant.
© 2022, Marmon Foodservice Technologies Inc.
QUEST ELITE 4 Flavor Installation, Service & Decommissioning Manual
Low Side Pressure
Models
(psig)
QST Elite 4FL
88
High Side Pressure
(psig)
282
- 51 -
Publication Number:721Q14101MNL
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