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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.
1 1 1 1 1
When making the cuts to the
CAUTION
insulation, be careful not to
AS
damage the drain pan.
2 2 2 2 2
3-2. Placing the Unit Inside the Ceiling
(1)
When placing the unit inside the ceiling, deter-
S
mine the pitch of the suspension bolts using the
supplied full-scale installation diagram. (Fig. 3-1)
3 3 3 3 3
Tubing must be laid and connected inside the
ceiling when suspending the unit. If the ceiling is
X
already constructed, lay the tubing into position
for connection to the unit before placing the unit
4 4 4 4 4
inside the ceiling.
(2)
Thread the 2 hexagonal nuts and washers (field
K
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
5 5 5 5 5
suspension lugs.
T
(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
6 6 6 6 6
the flange of the unit should follow the
dimensions given in Figs. 3-8 and 3-9.
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
173
For fresh air intake
(ø 125 hole)A
0772_AS_I
Fig. 3-6
Suspension bolt
Suspension lug
Nuts and washers
(2 sets)
Upper
Lower
0041_X_I
Fig. 3-7
70
70
15
Suspension bolts
Tubing side
15
Suspension bolts
0042_AS_I
Fig. 3-8
Ceiling
material
0043_AS_I
Fig. 3-9
Page 22
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