Engineering Manual

ART COOL GALLERY INDOOR UNITS
Connecting the Indoor Unit Piping to the Field-Installed Piping
If the drain hose is routed in-
side a room, add insulation
to prevent condensation from
forming.
1. Center align the indoor unit piping (refrigerant and drain) and the field-installed
piping, then hand tighten the flare nut.
2. Tighten the flare nut with a torque wrench.
3. Attach the drain tube piping to the indoor unit drain hose as shown below.
Indoor unit piping
Flare nutField-installed
piping
Spanner
Field-installed
piping
Flare nut
Torque
wrench
Figure 56:Indoor Unit to Field-Installed Piping Connection.
Narrow tape
Adhesive
Drain extension
Indoor unit
drain hose
Figure 57:Extending the Drain Hose.
Bands
Insulation
Narrow tape
Field-supplied
piping
Wide tape
Wrap with tape
Indoor unit
piping
Piping
Wrap with tape
Drain hose
Piping
Wide tape
1.
2.
3.
Figure 58:Insulating the Piping.
Installation and Best Layout Practices
Drain Slope
Drain hose should point
down so water can flow
away easily.
Slope Down
Figure 59:Drain Piping Slope.
Checking the Drainage System
Figure 60:Checking the Drainage
System.
1. Pour water on the in-
door unit evaporator.
2. Ensure the water
flows through and out
of the hose and away
from the indoor unit
without leaking.
Indoor Unit s
Drain extension
Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be properly and completely
covered in insulation (up to the indoor unit piping connections). Any exposed piping may
generate condensate or will cause burns if touched. Insulation for this field-installed refrig-
erant piping must have a minimum heat resistance of 248°F.
Drain Piping Insulation
Drain piping must have insulation a minimum of 7/32 inches thick.
Installing the Insulation
1. Overlap the insulation at the connection of the field-installed piping and the indoor unit
piping. Tape together so that no gaps exist.
2. Secure insulation to the rear piping housing section with vinyl tape.
3. Bundle the piping and drain hose with tape where they meet at the back of the indoor
unit frame. Position the drain hose at the bottom of the bundle (positioning the drain
hose at the top of the bundle may cause the drain pan to overflow inside the indoor
unit).
Insulating the Refrigerant and Drain Piping
ART COOL GALLERY™ | 51
Art Cool Gallery™
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