22
S4179544
1
1
1
1
1
AS
2
2
2
2
2
S
3
3
3
3
3
X
4
4
4
4
4
K
5
5
5
5
5
T
6
6
6
6
6
U
7
7
7
7
7
D
8
8
8
8
8
F
9
9
9
9
9
FM
0
0
0
0
0
AS
-
-
-
-
-
C
=
=
=
=
=
WT
If the system requires fresh air to be drawn into the
unit, cut and remove the insulation (both externally and
internally) at the location shown as
A
in Fig. 3-6.
When making the cuts to the
insulation, be careful not to
damage the drain pan.
3-2. Placing the Unit Inside the Ceiling
(1)
When placing the unit inside the ceiling, deter-
mine the pitch of the suspension bolts using the
supplied full-scale installation diagram. (Fig. 3-1)
Tubing must be laid and connected inside the
ceiling when suspending the unit. If the ceiling is
already constructed, lay the tubing into position
for connection to the unit before placing the unit
inside the ceiling.
(2)
Thread the 2 hexagonal nuts and washers (field
supply) onto the 4 suspension bolts as shown in
Fig. 3-7. Use 2 sets of nuts and washers (upper
and lower), so that the unit will not fall off the
suspension lugs.
(3)
The distance between the unit and the opening of
the ceiling, and the distance between the bottom
surface of the ceiling and the bottom surface of
the flange of the unit should follow the
dimensions given in Figs. 3-8 and 3-9.
CAUTION
Fig. 3-6
Fig. 3-7
Fig. 3-8
Fig. 3-9
0041_X_I
Nuts and washers
(2 sets)
Suspension bolt
Suspension lug
Upper
Lower
0042_AS_I
Suspension bolts
Tubing side
Suspension bolts
15
15
70
70
0043_AS_I
37
5
Ceiling
material
173
For fresh air intake
(ø 125 hole)
A
140
0772_AS_I
