Trane IntelliPak 2 Series, Инструкция по установке, эксплуатации и обслуживанию

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RT-SVX24Q-EN 57
Figure 40. Charge evacuation diagram - evaporative condensers
Liquid Line
Schrader Port
Manual Shut-off Valve
Hot Gas Reheat Valve
Hot Gas Bypass Valve
Thermal Expansion Valve
Copper Cap w/Schrader Port
Solenoid Valve
Refrigerant Shipping Location
Liquid Line
Hot Gas Reheat Line (Option)
Hot Gas Reheat Line (Option)
Suction Line
Suction Line
Condenser Coil Circuit 1
Condenser Coil Circuit 2
LEGEND:
Tubing and Wiring Connections
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.
N No otte e:: 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.
N No otte e:: Additional care should be taken 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.
N No otte e:: 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. If the rise exceeds this, there is either
still moisture in the system or a leak is present.
10. Charge the system per the unit nameplate field
charge. Do not add refrigerant in the suction line at
this time to prevent excessive refrigerant in the low
side prior to compressor start-up.
11. At the liquid line angle valve add as much R-410A
LIQUID as possible. Depending on conditions, it
could not be possible to add more than 60% of the
field charge. This will be adequate for compressor
start-up. More charge will be added after
compressors are started. Use an accurate scale to
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