Panasonic U-100PEY1E5 - Page 400

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1-390
Placing the Unit Inside the Ceiling
(1) When placing the unit inside the ceiling, determine the
pitch of the suspension bolts using the supplied full-scale
installation diagram. (Fig. 2-4)
Tubing and wiring must be laid inside the ceiling when
suspending the unit. If the ceiling is already constructed,
lay the tubing and wiring into position for connection to the
unit before placing the unit inside the ceiling.
(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 15 mm. (Fig. 2-4)
Over 15 mm
13 – 18 mm
Full-scale installation diagram
(printed on top of container box)
Supplied bolt
Fig. 2-4
(3) Thread the 3 hexagonal nuts (field supply) and 2 washers
(
supplied)
onto each of the 4 suspension bolts (Fig. 2-5).
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.
Nuts and washers
(use for upper and lower)
Suspension bolt
Double nut
Notch
Suspension lug
13 – 18 mm
Fig. 2-5
(4) Adjust so that the distance between the unit and the ceiling
bottom is 13 to 18 mm. 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.
Installing the Drain Pipe
(1) Prepare a standard hard PVC pipe (O.D. 26 mm) 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 drainage.
(2) Installing the drain hose
To install the drain hose, first place 1 of the 2 hose
bands over the unit drain port and the other hose band
over the hard PVC pipe (not supplied). Then connect
both ends of the supplied drain hose. (Fig. 2-6)
140
25 25
5
5
Twist tie
(4 ties, supplied)
Drain port
Drain hose
insulation
(supplied)
Hard PVC pipe
(equivalent to
O.D. 26 mm)
(Field supply)
Position to
fasten hose
bands
Hose band
(2 bands, supplied)
Unit
Unit: mm
Drain hose
(supplied)
Fig. 2-6
On the unit drain side, grasp the hose band with pliers
and insert the drain hose all the way to the base.
If other commercially available hose bands are used, the
drain hose may become pinched or wrinkled and there
is danger of water leakage. Therefore be sure to use the
supplied hose bands. When sliding the hose bands, be
careful to avoid scratching the drain hose.
Do not use adhesive when connecting the supplied
drain hose to the drain port (either on the main unit or
the PVC pipe).
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.
Wrap the hose with the supplied drain hose insulation and
use the 4 twist ties so that the hose is insulated with no gaps.
Do not bend the supplied drain hose 90° or more. The
hose may slip off.
CAUTION
Attach so that the hose band fastener is on the side of
the drain port.
Attach the hose bands so that each is approximately 5
to 25 mm from the end of the supplied drain hose.
NOTE
Make sure the drain pipe has a downward slant (1/100 or
more) and that there are no water traps.
CAUTION
Do not install an air bleeder as this may cause water to
spray from the drain pipe outlet. (Fig. 2-7)
Air bleeder prohibited
Fig. 2-7
In cases where it is necessary to raise the height of
the drain piping, the drain piping can be raised to a
maximum height of 850 mm above the bottom surface
of the ceiling. Under no conditions attempt to raise it
higher than 850 mm above the bottom surface of the
ceiling. Doing so will result in water leakage. (Fig. 2-8)
SM830211-07PAC-i.indb390SM830211-07PAC-i.indb390 2013/09/1722:48:252013/09/1722:48:25