Sanyo 85464359981002 Installing the Drain Piping, Caution for Ducting Work, Fig

3-21. Installing the Drain Piping

(1)Prepare standard hard PVC pipe (O.D. 1-1/4") for the drain and use the supplied drain socket to prevent water leaks. The PVC pipe must be purchased separately. When doing this, apply adhesive for the PVC pipe at the connection point.

(2)If connecting a drain joint (supplied) to the threaded drain port, first wrap the drain port threads with sealing tape, then connect the joint. (Fig. 3-83)

(3)After connecting the drain pipe securely, wrap insulator (field supply) around the pipe.

(4)Ensure the drain pipe has a downward gradient (1/100 or more) and prepare traps as indicated in Fig. 3-84.

(5)Also, in another part of the pipe arrangement, prepare traps with an inspection plug to clean dust or debris that may cause leaking of water. (Fig. 3-85)

D(6) After connecting the drain piping, slowly pour water into the drain pan to check that the water drains smoothly.

3-22. Caution for Ducting Work

●This unit has high static pressure (applicable external static pressure Max. 0.68 – 0.88 in.WG. In the case of small pressure resistance (for instance, a short duct), install a damper for adjusting air flow volume as air flow volume / air flow noise increases.

●If the air conditioner is to be installed in a room such as an office or meeting room which needs a low sound level, provide a supply and return noise absorption chamber with an acoustic liner.

●Include an air filter (field supply) at the return duct.

Sealing tape

Drain pan

Drain joint (supplied)

Drain opening

(25A or 1-11/32"male screw)

Fig. 3-83

Downward gradient

Min. 1/100

Good

Not good

Fig. 3-84

Min. 3-15/16 in.

Min. 1-31/32 in.

Inspection plug

3-23. Indoor Fan Performance

How to Read the Diagram

The vertical axis is the External Static Pressure (in.WG) while the horizontal axis represents the Air Flow (CFM). The characteristic curve for the “H,” “Med,” and “Lo” fan speed control.

The nameplate values are shown based on the “H” air flow. Therefore in the case of 36 Type, the flow is 1059 CFM, while the External Static Pressure is 0.72 in.WG at “H” position. If the external static pressure is too great (due to long extension of duct, for example), the air flow volume may drop too low at each air outlet.

Fig. 3-85

(in.WG) 36 Type (in.WG) 48 Type

1.00

1.00

ne

Limit

li

li

n

e

it

0.80

Lim

0.80

re

H

re

ssu

ssu

H

M

M

Pre

0.60

Pre

0.60

L

L

tatic

H

tatic

nal S

0.40

nal S

0.40

Exter

Exter

H,M

0.20

M

0.20

e

e

t

lin

Limit

lin

Limi

0

883

1059

1236

0

1059

1236

1412

Air Flow (CFM) Air Flow (CFM)

NOTE H: At shipment

Fig. 3-86

46