ISD 480Q
Ducted Split System
Indoor Unit 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.
Options
1. Filters.
2. Electric Heat (factory fitted).
INSTALLATION
Unpacking
The unit's supply air spigot has been
inverted for ease of shipping. Remove the
spigot and replace it, facing outwards.
Positioning & Mounting
Provide 500 mm minimum clearance to the
electrical panel.
Mount on a suitable level platform using
vibration isolators. Access to fixing centres
beneath the return air spigot can be made
via the removeable bungs in the spigot's
base.
Fig.1 Dimensions (mm)
Not to Scale Net Weight 244 kg
NOTE
The manufacturer reserves
the right to change
specifications at any time
without notice or obligation.
Certified dimensions
available on request.
CORNER LOADS (kg)
WX Y Z
60 73 61 48
MODEL
ISD 480Q
PROJECTION
1200 OA
ELECTRICAL
BOX
1880 OA
40
410 630
DRAIN 28 OD
ELECTRICAL
CONDUIT HOLES
15060
775
OVERALL
WX
Y
Z
705 475
1800
1086
260
120
255
OPTIONAL
VERTICAL SUPPLY
AIR SPIGOT
OPTIONAL
VERTICAL SUPPLY
AIR SPIGOT
REFRIG.
CONN'S
1000 MINIMUM
CLEARANCE
1000 MINIMUM
CLEARANCE
ACCESS
PANEL HINGED
ACCESS
PANEL
947 SPRING CTR (16Ø)
997 FIXING CTR (13Ø)
395 395
Condensate Drain
The unit has an internal sloping
condensate drain tray. The trap should
have a vertical height of at least 100 mm.
The drain should have a slope of at least
1 in 50 and must not be piped to a level
above the unit drain tray (refer Fig.2).
For long condensate pipe runs, fit a vent
pipe near the drain trap. The top of the vent
pipe must be at least 100 mm above the
ISD unit's drain tray.
It is essential that the drainage system for
the evaporator is checked by pouring water
in the drain tray and seeing that it
discharges at the end of the drain and does
not overflow the drain tray.
INDOOR-OUTDOOR UNIT CONNECTIONS
Refer to the relevant OSA Outdoor Unit
'Installation & Maintenance' pamphlet for
piping instructions. For wiring connections,
refer to the Outdoor Unit wiring diagram.
REFRIGERATION PIPING
Pipe Connection Sizes & Type
Liquid: 19 mm OD (3/4") sweat
Suction: 35 mm OD (13/8") sweat
The ISD is shipped from the factory with a
pressurised holding charge of nitrogen.
Immediately before removing any brazed
pipe connection's seal, reduce holding
charge to atmospheric pressure using the
Schraeder valve provided on the suction line.
Warning: failure to do so may cause injury.
Refer to the Outdoor Unit 'Installation &
Maintenance' pamphlet for evacuation
procedure and piping requirements.
ELECTRICAL WIRING
The electrical supply required (via the
Outdoor Unit) is specified on the Outdoor
Unit's wiring diagram.
Electrical work must be carried out by a
qualified electrician in accordance with
local supply authority regulations and the
wiring diagram.
In a free blow or low resistance application,
beware of exceeding the fan motor's full
load amp limit (refer Outdoor Unit's wiring
diagram).
Reverse Cycle Systems:
To make the
indoor fan switch off during de-ice cycle,
refer to the Outdoor Unit wiring diagram for
the appropriate changes.
INDOOR FAN SPEED
The fan motor is fitted with a factory set
adjustable pitch pulley. One revolution of
adjustment is equal to 7% change in air
volume flow rate.
To change the fan speed loosen the motor
mounting plate hold down screws, loosen
the pulley grub screws and turn the pulley
flange the desired amount. The pulley
adjustment is locked by tightening the grub
screws in the keyways.
When setting air flows ensure that the
pulleys are in alignment. Tension the belt
by adjusting the motor mounting plate.
COOLING OPERATION
An Outdoor Unit HP Fan Speed Controller,
available from temperzone, is recommended
where indoor cooling is required at ambient
conditions below 20°C.
