F3Dn Service Manual Refrigeration / Section 4.6
For Technical Support, Call 800-537-2653. Copyright
2006 Franke, Inc. All rights reserved.
4.6 Repair System [Refrigerant] Leak
1)
Roll F3Dn unit out to disconnect power at outlet. [Pull
plug.]
2)
Using a medium Phillips screwdriver, remove two screws
securing control panel and the four screws on the sloped
access panel.
3)
Repair or replace refrigerant lines as needed.
4)
Note
: Recover any residual refrigerant and ensure line
pressure is equalized to zero, before opening the
refrigeration system.
5)
Note
: For larger leaks that may have contaminated the
system, replace the expansion valve and filter. [
See
Section 4.7
] In addition, the system may need to be
drained completely and new Polyol Ester Oil added. If
required, the old Polyol Ester Oil should be recovered
and disposed of in accordance with Federal Laws
covering the handling of hazardous materials.
6)
When resealing the system, use a continuous Nitrogen
charge to assure no contaminants enter the system,
especially when brazing.
7)
Before recharging the system, pull a vacuum equivalent
to 30 inches [760 mm] of Mercury, for a minimum of 30
minutes.
8)
Recharge the system with R404A refrigerant, per
nameplate label specification.
Test
operation of Refrigeration System by:
9)
Plug in unit power cord to power source.
10) Turn ON unit at Main Power-ON Switch.
11) If compressor starts and brings the Freezer compartment
down to the normal operating temperature range of 0 to -
10
°
F [-18 to -23
°
C], proceed to Step 12.
12) Reassemble sloped access panel and control panel and
return F3Dn dispenser to normal operating location, if it
was moved.
[Photo 1]
Remove two control panel
screws and four screws on the
sloped panel to access
compressor compartment.
[Photo 2]
Recover any residual refrigerant
and ensure line pressure is zero
before opening system.
[Photo 3]
When resealing the system or
repairing leaks, use continuous
Nitrogen charge to keep
contaminants out.
Rev. 2 11/06
Ø
IMPORTANT
: Any residual refrigerant charge
should be recovered in strict accordance with the
Federal Clean Air Act.
