TemperZone OSA 220 Installation & Maintenance

OSA 220
Split System
Outdoor Unit
GENERAL
OSA 220 - A general designation for outdoor unit
OSA 220C - Outdoor unit, cooling only version
OSA 220R - Outdoor unit, reverse cycle version
This OSA 220 Outdoor Unit must be
installed in accordance with all national and
local safety codes.
INSTALLATION
Positioning
Refer to dimension diagram below for
minimum clearances. Mount either free
standing or on a wall using the optional
mounting brackets available.
Free Standing :
Fasten the unit down to a firm flat horizontal
base using the four holes provided in the
mounting rails.
Dimensions (mm)
PROJECTION
Not to Scale
Net Weight
OSA 220C 147 kg
OSA 220R 151 kg
ELECTRICAL
CONDUIT
20 DIA.
580
DRAIN MTG CTR
HOLE
595 OA
When the unit is being installed on a roof it
is recommended that the unit is installed on
a substantial structure with vibration
isolating springs beneath the unit. These
springs are not supplied with the unit.
Wall Mounting Option:
Complete wall mounting instructions are
supplied with the optional wall mounting kit.
Drain
Install the unit with a positive fall to the rear
to ensure condensate and/or rain water
drains away freely through the drain holes
provided. For a totally drip free installation
mount the unit in a separate drain tray.
OPTIONAL FAN SPEED CONTROLLER
Fit a head pressure fan speed controller
where cooling is required in below 20°C
ambient conditions for long periods of time.
An electronic HP Fan Speed Controller
(4 amp) is available from temperzone.
150 MIN. CLEARANCE
1000 MIN. CLEARANCE
2000 MIN. CLEARANCE
SERVICE
ACCESS
PANEL
20 DIA.
HOLES
REFRIG.
CONN'S
20 DIA.
DRAIN
HOLE
722 MTG CTR
200 10 DIA. SLOTS
1140 OA
OSA 220
ELECTRICAL
ACCESS
PANEL
1030
OA
140
20 DIA.
DRAIN
HOLE
200
Installation &
Maintenance
REFRIGERATION PIPING
General
The OSA 220 is shipped with a refrigerant
charge sufficient for a 10 m line length.
The matched indoor unit is shipped with a
holding charge of nitrogen. OSA 220 units
have one flare and one brazed pipe
connection.
Recommended Pipe Sizes
Suction pipe : 28 mm OD
Liquid pipe : 13 mm OD
Line Lengths
For line lengths in excess of 30 m, fit a
compressor crankcase heater to prevent
liquid refrigerant condensing in the 'off'
Oil Charge
cycle. Refer also to
Maximum extended line length is 50 m.
Height Separation Limits
Reverse Cycle Systems
Outdoor Unit above Indoor Unit : 12 m
Outdoor Unit below Indoor Unit : 12 m
Cooling Only Systems
Outdoor Unit above Indoor Unit : 18 m
Outdoor Unit below Indoor Unit : 12 m
Vertical Risers
If the outdoor unit is to be installed above
the indoor unit, then the suction riser should
be trapped at the bottom of the vertical rise
and then again at 5 m (maximum) intervals.
This is to ensure oil return to the compressor.
The trap to be a 'swan neck' curve in the
pipe, with no change in the pipe size.
Piping
1. Use clean sealed refrigeration grade
piping.
2. Cut pipe with a pipe cutter ONLY.
3. Use long radius bends (2x pipe dia.).
4. Insulate the suction (gas) line and seal
all insulation joints.
5. Filter dryer may be fitted in the liquid line
(bi-flow type on reverse cycle systems).
6. Include a process point in the
interconnecting pipework.
7. Ensure open pipe ends are sealed until
the final connection is made.
8. Immediately before removing brazed
pipe connection's seal, reduce holding
charge between connection points and
service valves to atmospheric pressure.
Warning: Failure to do so may cause
injury.
overleaf.
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