36
RT-SVX073A-EN
Figure 17. Refrigeration diagram
Schrader Valve
Manual shuto valve
Hotgas bypass valve
Electronic expansion valve
Cap & Schrader
Solenoid valve
Hot gas Reheat Valve
Condenser Coil Circuit 2
Liquid Line
Suction Line
Hot Gas Reheat
Hot gas Bypass
Suction Line
Liquid Line
Condenser Coil Circuit 1
Legend
Reheat Coil
Evaporator Coil
Tubing and Wiring Connections
Air-Cooled Tubing Connection
One piece Air Cooled units are shipped with refrigerant
throughout the entire tubing assemblies.
Two 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 two piece air-cooled units is
REQUIRED.
To prepare the two 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 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.
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
Installation
To Next Page
Loading...
