Installation
RT-SVX24J-EN 59
Complete Tubing and Wiring Connections
as follows:
Air-Cooled Tubing Connection
One piece Air Cooled units are shipped with refrigerant
throughout the entire tubing assemblies.
Two and three piece Air-Cooled low side and condenser
sections are shipped with a Nitrogen holding charge. All
service valves are shipped in an open position. Additional
interconnecting tubes (approx. 15-20” in length) will be
supplied with the unit.
Note: Field charging of 2 and 3 piece air-cooled units is
REQUIRED.
To prepare the two or three piece sections for joining
install pressure gauges to the appropriate access valve(s)
to verify nitrogen charge is present.
1. Relieve the pressure before attempting to unsweat the
“seal” caps.
2. Remove the brackets which support the suction tubes
(retain for possible use later for unit reassembly) after
the tubing connections are complete.
3. Place wet rags on the flow/ ball valve on the high side
when suction tubes are being
brazed.
Note: Additional care should be tak
en when brazing near
the wire bundle.
4. Sweat the copper caps off both the high and low side
of the suction and liquid
lines of both circuits. If present
also sweat off the copper caps from hot gas bypass or
hot gas reheat lines.
5. Clean the joints of weld puddles to avoid insertion
problems.
6. Cut the appropriate interconnecting tube to a length
approximately 0.75"- 1" more
than the distance
between the two tubes.
7. Insert the appropriate tube to the complete depth of the
bell on one side of
the joint and align the other
side(prying the high side may be needed). Make sure
the insertion depth is met.
8. Complete the connections by brazing the tubes in
place.
Note: Refrigeration ball valves are intended for general
service and are not
a positive shutoff device.
9. Once all connections have been brazed, evacuate the
entire system.The recommended method
for
evacuation and dehydration is to evacuate the system
to 500 microns or less.To establish that the unit is leak-
free, use a standing vacuum test.The maximum
allowable rise over a 15 minute period is 200 microns.
Figure 37. Charge evacuation diagram - evaporative condensers
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