Allied Air 4SCU14LE SERIES Kurulum ve Bakım Talimatları Kılavuzu - Sayfa 6
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Sayfayı YazdırRefrigerant Line Sets: Installing Vertical Runs (new construction shown)
NOTE: Similar installation practices
should be used if line set is to be
installed on exterior of outside wall.
Brazing Connection Procedure
1. Install a thermal expansion valve kit (sold separately)
that is approved for use with R410A refrigerant in the
liquid line at the indoor coil. Install the equalizer port
from the kit in the suction line.
2. Cut ends of refrigerant lines square (free from nicks or
dents). Debur the ends. The pipe must remain round;
do not pinch end of line.
3. Before making line set connections, use dry nitrogen to purge
the refrigerant piping. This will help to prevent oxidation and
the introduction of moisture into the system.
4. Use silver alloy brazing rods (5% or 6% silver alloy for
copper-to-copper brazing or 45% silver alloy for copper-
to-brass or copper-to-steel brazing) which are rated for
use with R410A refrigerant.
5. Remove the Schrader core assemblies before brazing
to protect them from damage due to extreme heat.
Replace the cores when brazing is complete.
Page 6 of 20
Vapor Line Wrapped
with Armaflex
Outside Wall
IMPORTANT:
Refrigerant
lines must not
contact structure.
PVC Pipe Fiberglass
IMPORTANT: Refrigerant
lines must not contact wall.
Outside Wall
Wood Block
Between Studs
Liquid Line
Caulk
Insulation
Figure 7
6. Remove light maroon washers from service valves and
shield light maroon stickers to protect them during brazing.
Wrap a wet cloth around the valve body and copper tube
stub to protect it from heat damage.
7. Braze the line set to the service valve. Quench the joints
with water or a wet cloth to prevent heat damage to the
valve core and opening port. The tube end must stay
bottomed in the fitting during final assembly to ensure
proper seating, sealing, and rigidity.
Polyolester (POE) oils used with R410A refrigerant
absorb moisture very quickly. It is very important that
the refrigerant system be kept closed as much as
possible. DO NOT remove line set caps or service valve
stub caps until ready to make connections.
Issue 1015
Vapor Line
Liquid Line
Wire Tie
Inside Wall
Strap
Sleeve
Wire Tie
Wood Block
Wire Tie
Strap
Sleeve
WARNING
506251-01