TemperZone OSA 840RKTBGV Installation & Maintenance

OSA 840RKTBGV
Reverse Cycle R410A
Split System Outdoor Unit
GENERAL
The OSA 840RKTBG outdoor unit is a twin
system that provides the facility for capacity
control (staging) or staggered starting. One
of the two compressors is digital, permitting
a further stage of capacity variability.
This OSA 840RKTBG Outdoor Unit must be
installed in accordance with all national and
local safety codes.
Option
TZT-100 Room Temperature Controller
INSTALLATION
Positioning
Refer to dimension diagram below for
minimum clearances. Fasten the unit down
to a firm flat horizontal base using the six
holes provided in the mounting rails.
Dimensions (mm)
PROJECTION
Not to Scale
Net Weight 589 kg
CORNER LOADS (kg)
W X Y Z
193 92 92 194
1680
REFRIG. CONN'S
1502
MOUNTING CENTRES
(Digital c/w UC8 Controllers)
When the unit is being installed on a roof
it is recommended that the unit is installed
on a substantial structure with anti-vibration
mounts or pads.
Drain
Four drain holes are provided in the base of
the unit to release condensate and/or rain
water.
Coil Protection
A coil protection guard is available as an
optional extra.
REFRIGERATION PIPING
General
The OSA 840 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 840 units
have brazed pipe connections.
500 MIN. CLEARANCE
W
ACCESS
PANEL
Z
500 MIN. CLEARANCE
ACCESS
PANEL
55
262
MOUNTING CENTRES
OSA 840RKTBGV
OUTDOOR
AIR FLOW
X
Y
OUTDOOR
AIR FLOW
1210
1771
2300 O/A
Installation &
Maintenance
Recommended Pipe Sizes
Suction pipe (x2): 35 mm OD
Liquid pipe (x2): 16 mm OD
Line Lengths
The standard unit is suitable for a line length
up to 50 m. For line lengths between 50 m
and 90 m, refer to temperzone's
Split Systems Installation Guide (refer
www.temperzone.biz/Technical Support).
Refer also to Oil Charge overleaf.
Maximum line length when extended is 90m.
Height Separation Limits
Outdoor Unit above Indoor Unit : 20 m
Outdoor Unit below Indoor Unit : 20 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 8 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 and accessories designed
specifically for R410A.
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. Bi-flow type filter dryer may be fitted in
the liquid line.
6. Include a process point on 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.
Important
Do not connect System 1 to System 2.
Charging
The unit is supplied with sufficient refrigerant
HFC-410A (R410A) for 10 m of pipework
between the indoor and outdoor units;
refer wiring diagram specification table for
O/A
amount. Add 170 g per metre per system
above 10 m.
Procedure (per system):
1. Evacuate Indoor Unit and
interconnecting pipework to a pressure
of 500 microns and hold for 15 mins.