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Fig. 3-5
(2) The length of suspension bolts must be appropriate
for a distance between the bottom of the bolt and the
bottom of the unit of more than 19/32 in. as shown in
Fig. 3-5.
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as shown
in Fig. 3-5. Use 1 nut and 1 washer for the upper side,
and 2 nuts and 1 washer for the lower side, so that the
unit will not fall off the suspension lugs.
(4) Adjust so that the distance between the unit and the
ceiling bottom is 15/32 to 43/64 in. Tighten the nuts on
the upper side and lower side of the suspension lug.
(5) Remove the protective polyethylene used to protect
the fan parts during transport.
3-4. Installing the Drain Piping
(1) Prepare a standard hard PVC pipe (O.D. 1-1/4 in.) for
the drain and use the supplied drain hose and hose
band to prevent water leaks.
The PVC pipe must be purchased separately. The
unit’s transparent drain port allows you to check drain-
age. (Fig. 3-6)
●
Insert the drain pipe until it contacts the socket,
as shown in Fig. 3-6, then secure it tightly with the
hose band.
●
Do not use adhesive when connecting the supplied
hose.
Reasons: 1. It may cause water to leak from the
connection. Since the connection is
slippery just after the adhesive has been
applied, the pipe easily slips off.
2. The pipe cannot be removed when
maintenance is needed.
●
Do not bend the supplied drain hose 90° or more.
The hose may slip off.
●
Align the hose bands with the end of the hose.
Tighten the hose band firmly. Please make sure
that the bead is not covered by the hose band.
(Fig. 3-6)
(2) After checking the drainage, wrap the supplied packing
and drain pipe insulator around the pipe. (Fig. 3-7)
NOTE
Make sure the drain pipe has a downward gradient (1/100
or more) and that there are no water traps.
15/32 – 43/64 (12 – 17)
Suspension bolt
Suspension lug
Nuts and washers
(use for upper and lower)
Notch
Double nut
CAUTION
CAUTION
Tighten the hose clamps so
their locking nuts face upward.
(Fig. 3-6)
CAUTION
●
Do not install an air bleeder
as this may cause water to
spray from the drain pipe
outlet. (Fig. 3-8)
Fig. 3-6
Fig. 3-7
Fig. 3-8
Bead
Hose band
Supplied
drain hose
Connection pipe
(drain port)
Align the hose
band with the end
of the pipe
(Field supply)
(Field supply)
Packing
(supplied)
VP-25
VP-25
Hard PVC pipe
PVC adhesive
Hard PVC
socket
Drain insulator (supplied)
Air bleeder prohibited
Unit: in. (mm)