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1. Specifications
6-9. Duct for Fresh Air
There is a duct connection part on side of the indoor
unit. (Fig. 1-27)
(1) Accessories
Check that the following parts are in the box when
unpacking.
(2) Installation
Fit the duct connection box into the rectangular hole of
air-intake plenum with the accessory screws.
(M4 × L1/2", 4 pcs)
(c) Installing the indoor unit
Install the indoor unit to the ceiling.
(Install the indoor unit according to instructions enclosed
with the outdoor unit.)
Installation steps (a) to (d) are the same for both the
CZ-26BCU1U and the CZ-42BCU1U. The drawing
illustrates installation of air-intake plenum to the
CZ-26BCU1U
(a) Installing the air-intake plenum
Set the air-intake plenum to the indoor unit taking care
not to set to the incorrect direction.
(b) Installing the duct connection box
Fasten the duct connection flange to the duct connection
box with the accessory screws. (M4 × L1/2", 4 pcs)
Fasten the air-intake plenum with the supplied screws.
(M5 × L4-7/8", 4 pcs)
CAUTION
When installing in a pre-
existing location, install the
indoor unit before installing
the duct connection box.
Air-intake plenum Type
CZ-26BCU1U
CZ-24KPU1U
(S-26PU1U6)
CZ-42BCU1U
CZ-36KPU1U
(S-36PU1U6, S-42PU1U6)
Air-intake plenum (for fastening)
Duct connection flange/box (for fastening)
For fresh air intake
2-5/32
2-3/8
4-ø1/8 hole
ø4-13/32
Detail of fresh air intake
2P socket (Green)
3P socket (White)
2P socket (Green)
3P socket (White)
(ceiling panel side)
Panel lead wire (3P, 2P)
(switch box side)
Fig. 1-27
Fig. 1-28
Unit: inch
Air-intake plenum (including Duct connection box and
flange) are attached to the indoor unit when used to
take fresh outdoor air.
NAME
Q’ ty
4
REMARKS
8
1
(for fresh air)Duct connection box
(for connecting fresh air duct)
1
Duct connection flange
Screw (M5xL4-7/8”)
Screw (M4xL4-1/2”)
the air-intake plenum and fasten it to the side of the
Clamper
Air-intake
plenum
(M5 × L4-7/8", 4 pcs)
Installation screws
Socket
cover
Indoor
unit
1