Johnson Controls YVAHP072B31S, Service Manual

Page: 207 / 1796

Service Manual
1-191
INSTALLATION
(1) The position of the drain pipe connection is shown in Figure 7.1.
(2) Prepare a polyvinyl chloride (PVC) pipe with 1-1/4 inch (32mm) outer diameter.
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piping must be performed with a DOWN-SLOPE pitch of 1/25 to 1/100.
(4) Insulate the drain pipe after connecting the drain hose.
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Perform drain piping work and attach the insulations before refrigerant piping work.
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to property damage.
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back into the unit and it may cause the water leakage when the unit operation is stopped.
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unit must be higher than the common pipe. The pipe size of the common drain pipe must be large
enough according to the unit size and number of units.
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the following procedures.
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NOTICE
9-1/4
14-31/32 31/32
2-9/32
2-9/32
31/32
31/32
7-13/32
1
1
-15/32
1-31/32 to 22-1
1/16 (Max.)
14-23/32 to 35-7/16 (Max.)
(Drain-Up Length)
Drain Piping (PVC Tube, VP25)
(Field-Supplied)
1/25 to 1/100 Down-Slope
Suspension Bracket
(Field-Supplied)
90
o
Elbow Pipe (VP25)
(Field-Supplied)
Lift Piping for Drain-Up
(PVC Tube, VP25)
(Field-Supplied)
Indoor Unit
Drain Pump
Drain
Pan
Rubber Boss
Drain Hose
(L: 11-13/16)
(Accessory)
Figure 7.1 Drain Piping
Common
Drain Piping
Connection
1/25 to 1/100 Down-Slope
Common Drain Piping
This drain pipe shall be
separating from other pipes.
Incorrect: Upward Slope
Unit
Rising Part
Incorrect
Correct
Indoor Unit
Auxiliary Drain Pan
(Field-Supplied)
To the Atmosphere
Figure 7.2 Auxiliary Drain Pan
NOTE:
When the relative humidity of inlet or ambient
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shown in Figure 7.2.