Hoshizaki KM-470AJ, Инструкция по эксплуатации

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ENGLISH
19
(1) Factory Line Set Modification
1) Recover the line set charge through the Schrader access ports on the Parker quick
connect couplings and store it in an approved container. Do not discharge the
refrigerant into the atmosphere. Remove the extra line set length or add extra tubing.
When adding extra tubing, insulate the additional copper tubes separately.
2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the lines through the Schrader access ports on the Parker quick
connect couplings (if using an electronic leak detector), and then raise the pressure
using nitrogen gas (0.97MPa). WARNING! Do not use R-404A as a mixture with
pressurized air for leak testing.
3) Evacuate through the Schrader access ports on the Parker quick connect couplings
and charge with R-404A refrigerant vapor to a pressure of 0.1 to 0.2 MPa. Go to step 2
in "II.G.5.a) Factory Line Set Installation."
b) Field Fabricated Line Set Installation
1) Route the copper tube liquid line and copper tube discharge line from the remote
condenser unit to the icemaker. Leave a service loop behind the icemaker to allow the
icemaker to be pulled out for service. See Fig. 11.
NOTICE
• Ensure that there are no traps and no kinks in the line set. The service loop is not
considered an oil trap.
• Do not coil extra line set. Fabricate the line set to the proper length.
2) Insulate the two copper tubes separately.
3) Install Parker quick connect couplings on each end. OS-QUICK, a universal quick
connect coupling kit available as optional equipment from Hoshizaki , is recommended.
NOTICE! Before brazing, remove the Schrader valve core from the access port.
When brazing, protect the coupling by using a wet cloth to prevent the coupling
from overheating. Do not use silver alloy or copper alloy containing arsenic.
4) Allow the coupling to cool, then replace the Schrader valve core.
5) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the lines through the Schrader access ports on the Parker quick
connect couplings (if using an electronic leak detector), and then raise the pressure
using nitrogen gas (0.97 MPa). WARNING! Do not use R-404A as a mixture with
pressurized air for leak testing.
6) Evacuate through the Schrader access ports on the Parker quick connect couplings
and charge with R-404A refrigerant vapor to a pressure of 0.1 to 0.2 MPa.