Engineering Manual

Connecting the Indoor Unit Piping to the Field-Installed Piping
Note:
If the drain hose is routed inside a
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densation from forming.
Note:
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the unit. Refer to the unit installation manual for details.
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 in-
door unit drain hose as shown.
Indoor unit piping
Flare nut Field-installed
piping
Spanner
Field-installed
piping
Flare nut
Torque
wrench
Figure 25: Drain Piping Slope.
Insulating the
Refrigerant and Drain Piping
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 24: Insulating the Piping.
Drain Slope
Drain hose should point down
so water can flow away easily.
Slope Down
Figure 22: Indoor Unit to Field-Installed Piping Connection.
Checking the Drainage System
Drain pan
Drain
hose
Drain hose
connection
Check for
leaks
Check for
leaks
Narrow tape
Adhesive
Drain extension
Indoor unit
drain hose
Figure 23: ([WHQGLQJWKH'UDLQ+RVH
1. Pour water on
the indoor unit
evaporator.
2. Ensure the water
flows through and
out of the hose
and away from the
indoor unit without
leaking.
ART COOL MIRROR INDOOR UNITS
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Refrigerant Piping Insulation
Field-installed vapor and liquid refrigerant piping lines must be properly and completely
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ate condensate. Insulation for this field-installed refrigerant 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
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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).
Figure 26: Checking the Drainage
System.
Ensure all piping is insulated. Exposed piping can cause burns if touched.
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26 | ART COOL MIRROR
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F