York CSA DH 036 Spécifications télécharger pdf (Page 61)

2-31

JOHNSON CONTROLS

FORM 102.20-N1 (1109)

2

3. Attach Pipe Chase

a) Set the pipe chase on the pipe chase curb

three inches away from the air handler.

b) Tilt the top of the pipe chase toward the air

handler. Work it under the air handler roof

overhang, being careful not to damage the

neoprene gaskets. Lift the pipe chase slightly

to clear the gasket on the curb and swing the

bottom against the air handler.

c) If there is a baserail, attach the baserail of the

pipe chase to the baserail of the air handler.

Use 3/8" bolts and lock washers provided;

placing bolts through the pipe chase baserail

brackets into the threaded holes in the air

handler baserail (see Fig. 2-43).

d) Make sure the pipe chase is square and the

door(s) close and open without rubbing or

binding.

e) Secure the pipe chase to the top and bottom

raceways (heavy gage metal) of the air

handler through the pre-punched holes of

the inside top and bottom anges of the

pipe chase. Use 1/4"-14 x 1" hex head self-

drilling screws (see Fig. 2-44).

FIG. 2-42 – APPLY GASKET TO PIPE CHASE

3

3

Horizontal gaskets

completely overlap

vertical gaskets in

all four corners

Horizontal gaskets

completely overlap

vertical gaskets in

all four corners

3

Install vertical gaskets ﬁrst

Install vertical gaskets first

1

Install horizontal

gaskets second

Install horizontal

gaskets second

2

3

3

PIPE CHASE

PIPE CHASE

LD12560A

FIG. 2-43 – PIPE CHASE BASERAIL TO UNIT

BASERAIL INSTALLATION

RIVET NUT

(installed by factory)

BASERAIL COVER

(installed later -

see Fig.2-44)

PIPE CHASE

BASERAIL

UNIT BASERAIL

LOCK WASHER,

(typ.6)

3/8"-16 X 1-1/2" BOLT,

(typ.6)

(When Purchased)

LD12034C

see Fig. 2-51)

Do not over tighten or strip self-drill-

ing screws. Screws in top and bottom

anges go into heavier gauge metal

than screws in cover angles.

f) Check to be sure door closes and latches

properly. If not, loosen self-drilling screws,

re-align pipe chase and re-tighten screws.

Occasionally the curb under the pipe chase

may be uneven, depending on installation.

4. Seal Pipe Chase to Air Handler.

a) Apply caulking to all exterior joints between

pipe chase and air handler baserails (when

purchased) (see Fig. 2-45).

FIG. 2-44 – SCREW PIPE CHASE TOP AND

BOTTOM INTERNAL FLANGES TO AIR

HANDLER

Install with self drilling screws. Insert screws

into, and between, all pre-punched holes in

ﬂange. Typical for both top and bottom

ﬂanges.

PIPE CHASE

Install with self drilling screws. Insert screws

into, and between, all pre-punched holes in

flange. Typical for both top and bottom

flanges.

PIPE CHASE

LD12561A

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