ISD 250Q, 300Q – 470Q
Ducted Split System
Indoor Units
Installation &
Maintenance
GENERAL
These ISD indoor units are designed to be
coupled with their respective OSA outdoor
units. Units must be installed in
accordance with all national and local
safety codes.
Combinations
One ISD 250Q with one OSA 240RA
One ISD 250Q with one OSA 250
One ISD 300Q with one OSA 290RA
One ISD 300Q with one OSA 300
One ISD 390Q with one OSA 390
One ISD 390Q with one OSA 410RA
One ISD 470Q with one OSA 480
Options
1. Filter Box.
2. Spring Mounting Kit
3. Electric Heat Kit.
FILTER BOX (Option)
The Filter Box is installed by unscrewing
the return air spigot and replacing it with
the Filter Box's filter-integrated spigot. The
filter may be accessed from either side of
this spigot. This new spigot has a depth of
150 mm, instead of 65 mm.
ISD c/w ELECTIC HEAT OPTION
(Factory Fitted)
Units supplied with electric boost heat are
designed to conform to AS/NZS 3350.2.40
1997.
ISD 250Q–390Q: 3 x 3 kW elements
ISD 470Q: 3 x 4 kW elements
Note
: Reverse Cycle systems fitted with
electric heat require an Outdoor Unit low
limit t/stat (supplied separately).
UNPACKING UNITS
In an area adjacent to the installation site
remove from the ISD unit from its carton
and examine it carefully for any damage
which may have occurred in transit. Record
any damage on the carrier's delivery
documents and refer the matter
immediately to the manufacturer's nearest
Sales Office.
INSTALLATION
Positioning & Mounting
Provide 500 mm minimum clearance to the
electrical panel. If the filter box option is to
be used, allow adequate clearance for the
two half length filters to be withdrawn from
either side of the unit.
If low noise is a critical factor in the
installation, refer to Figure 6 for noise
isolation recommendations.
It is recommended that the unit be mounted
using the spring mounting system, supplied
as an optional extra (Fig.3). This system
minimises transfer of vibration into the
building structure.
Fig.1 Dimensions (mm)
Not to Scale
ELECTRICAL
ACCESS PANEL
REFRIGERANT
CONNECTIONS
F
A
OVERALL
H
MOUNTING CENTRES
G
80
DRAIN 28 OD
E
C
688
OPTIONAL
SPRING MTG
CENTRES
ELECTRICAL
CONDUIT HOLES
65
65
B
OVERALL
735 OA
FAN ACCESS VIA
REMOVEABLE BASE
& DRAIN TRAY
ACCESS
PANEL
W
X
Y
Z
D
600
MOUNTING
STRAP
CENTRES
J
K
Net
Weight
ISD 250Q 120 kg
ISD 300Q 120 kg
ISD 390Q 175 kg
ISD 470Q 182 kg
MODEL
A
B
C
D
E
F
G
H
J
K
ISD 250Q
1625
575
975
300
240
1375
425
1518
125
325
ISD 300Q
1625
575
975
300
240
1375
425
1518
125
325
ISD 390Q
1680
700
1030
310
365
1430
555
1573
125
325
ISD 470Q
2060
700
1525
310
299
1705
555
1915
170
165
Fig. 2
Note
: The manufacturer reserves the right to change specifications at any
time without notice or obligation. Certified dimensions available on request.
CORNER LOADS (kg)
W
X
Y
Z
29
35
31
25
29
35
31
25
37
41
32
35
41
50
50
41
MODEL
ISD 250Q
ISD 300Q
ISD 390Q
ISD 470Q
OPEN
DRAIN
MINIMUM
SLOPE
20 mm PER m
(1 IN 50)
50 mm
MINIMUM
100 mm
APPROX.
'U' TRAP
100 mm
APPROX.
VENT PIPE
FOR LONG
CONDENSATE
DRAIN RUNS
UNIT
Condensate Drain
PROJECTION