27
S4179544
2
2
2
2
2
S
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. 3-23.
When making the cuts to the
insulation, be careful not to
damage the drain pan.
3-6. 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. 3-24)
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. 3-25. 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 Fig. 3-24.
Use the supplied installation gauge to check.
3-7. Installing the Drain Piping
(1)
Prepare a standard hard PVC pipe (O.D. 32 mm)
for the drain and use the supplied drain hose and
hose band to prevent water leaks. The PVC pipe
must be purchased separately.
When doing this, leave a gap between the drain
socket of the unit and the PVC pipe to allow the
drainage to be checked. The transparent drain
pipe allows you to check drainage. (Fig. 3-26)
Tighten the hose clamps so
their locking nuts face
upward. (Fig. 3-26)
(2)
After checking the drainage, wrap the supplied
packing and drain pipe insulator around the pipe,
then secure it with the supplied clamps.
(Fig. 3-27)
Make sure the drain pipe has a downward gradient
(1/100 or more) and that there are no water traps.
Fig. 3-23
Fig. 3-24
Fig. 3-25
Fig. 3-26
Fig. 3-27
For fresh air intake (ø125 hole)
140
0054_S_I
A
0041_X_I
Nuts and washers
(2 sets)
Suspension bolt
Suspension lug
Upper
Lower
Drain insulator (supplied)
Clamps (supplied)
0046_X_I
CAUTION
CAUTION
60
0775_S_I
Full-scale installation
diagram
Hose band (supplied)
Hard PVC pipe
(not supplied)
Packing (supplied)
Clamps (supplied)
To be installed
at the site
gap
0774_X_I
Transparent drain pipe
NOTE
