TemperZone OSA 220, Установка и обслуживание

Страница: 2 / 4

5. Test the operation of the high pressure
safety control by switching off the
outdoor unit's fan.
6. Test the operation of the reversing valve
by running the unit in both the heating
and cooling mode (OSA 220R only).
7. Check that the air flow over the outdoor
unit's coil is adequate and that the fan is
running smoothly.
8. Check the superheat - refer charging
procedure.
9. Check the supply air flow at each outlet.
10. Touch up all outdoor unit paintwork
damage to prevent corrosion.
MAINTENANCE
Weekly For First Four Weeks
1. Check indoor unit air filters (if fitted) and
vacuum or wash clean as necessary.
2. Check condensate drain for free
drainage.
3. Check compressor compartment for oil
stains indicating refrigerant leaks.
4. Check tightness of electrical
connections.
Six Monthly
1. Check the tightness of all fan and motor
mountings.
2. Check tightness of electrical
connections.
3. Check that fan motors are free running.
4. Check suction and discharge operating
pressures.
5. Replace indoor unit air filters (if fitted).
6. Check condensate drain for free
drainage.
Yearly
1. Check all refrigerant piping for chafing
and vibration.
2. Check the operation of electric heaters if
fitted.
3. Check air supply at all diffusers.
4. Check for excessive noise and vibration
and correct as necessary.
5. Check for insulation and duct damage
and repair as necessary.
6. Remove lint and dust accumulation from
outdoor coil fins.
7. Touch up all outdoor unit paintwork
damage to prevent corrosion.
NOTE
The manufacturer reserves the right to
change specifications at any time without
notice or obligation. Certified dimensions
available on request.
OSA 220R only -
It is recommended
electricians run two spare wires between
Outdoor Unit and Indoor Unit in case one,
or both, of the following options becomes
a requirement.
Note : Leave the wires
unconnected until required.
Option 1 -
Indoor Fan Off During De-Ice
Option 2 -
Electric Boost Heat.
Refer indoor unit's wiring diagram.
Standard units are suitable for use with
thermostats with either manual Heat/Cool
selection or automatic changeover
subject to the contact ratings of the
thermostats.
Refer to separate pamphlet for approved
thermostats, or contact the manufacturer's
nearest sales office.
If a compressor crankcase heater is fitted,
then a 24 hour power supply to the
crankcase heaters is required, otherwise the
warranty is void.
SYSTEM CHECK TESTS
1. Leave the remote switch in the off
position and close the mains isolating
switch.
A four hour delay period is required to
allow the crankcase heater (if fitted) to
drive any liquid refrigerant out of the
compressor oil.
2. Check that all fan motors are free
running.
3. Check for correct rotation of the
compressor. If rotation is incorrect the
compressor will not pump, be noisy, and
will draw minimal current. To correct
motor rotation, change the phasing at
the main power terminal.
4. Check that the thermostat is correctly
wired to the unit and is set at the desired
temperature.
5. Check that the air filters, if any, have
been correctly installed.
6. Check any supply air diffuser dampers
are open.
START UP PROCEDURE
Use the supplied Commissioning Sheet to
help you complete the following procedure:
1. Switch on the unit.
Note : If crankcase heater fitted, switch
on the unit after the four hour delay
period has expired.
2. Check the supply voltage.
3. Measure the current draw on the
compressor motor and on each fan
motor. Check all readings against the
specified values - particularly the indoor
fan amps if the unit is installed in a free
blow application.
4. Fit gauges and measure the suction and
discharge pressures.
Charging
The unit is supplied with 5.76 kg of
refrigerant HCFC-22 (R22) which is
sufficient for up to 10 m of pipework
between the indoor and outdoor units. Add
60 g of HCFC-22 per metre above 10 m.
Procedure:
1. Evacuate Indoor Unit and
interconnecting pipework to a pressure
of 500 microns and hold for 15 mins.
2. Add refrigerant, if needed, via the
Schraeder connection on the smaller of
the Outdoor Unit's two service valves.
3. Open the service valve at the Outdoor
Unit to allow refrigerant to flow
throughout the system.
4. Leak check all brazed and fitted joints.
IMPORTANT :
Step 8 of the 'Start Up Procedure' requires
you to check that the superheat on the
suction line (where it enters the Outdoor
Unit) is between 3
°
C - 5
°
C on cooling cycle
with an indoor air temperature in the range
21
°
- 27
°
C and outdoor air temperature in
the range 24 ° - 35 ° C. If the conditions of the
day do not allow this, use the heating cycle
(on a reverse cycle unit) or other heat
source to raise the indoor air temperature to
about 24
° C and blank off the outdoor coil to
raise the head pressure to 240–280 psig
(1750–1950 kPag). Alter charge up or down
to establish correct superheat.
WARNING:
This unit is designed for use ONLY with the
refrigerant HCFC-22. The use of other
refrigerants is NOT authorised or approved
by the manufacturer and may cause
operational problems such as poor
performance and efficiency, loss of capacity,
degradation of materials and refrigerant
leaks.
The use of flammable or explosive
materials as a refrigerant creates the
additional risks of fire and explosion
which may result in property damage,
personal injury or death.
Oil Charge
For line lengths in excess of 30 m, Suniso
4GS oil (or similar) should be added to the
refrigerant at the rate of
1 /
2
fluid ounce per
metre (13 ml/m) of suction piping.
ELECTRICAL REQUIREMENTS
Electrical work must be done by a qualified
electrician. The outdoor unit must be wired
directly from a distribution board by means
of a circuit breaker or H.R.C. fuse, and a
mains isolator provided - preferably close to
the Outdoor Unit.
Note : DO NOT USE REWIRABLE FUSES.
Pipe Length Capacity Loss
On Cooling Cycle Due to Pressure Drop
Note :
Loss percentages are approximations only, due to piping variations. No allowance made for vertical piping.
Pipe Size (mm)
Equivalent Line Pipe Length (m)
Liquid
13
Suction
28
28 mm
0.61 m
Suction Pipe Size OD
Large 90 ° Radius (2 x pipe dia.)
Additional Pipe Length to allow per Bend
This pamphlet replaces the previous
issue no. 2186 dated 02/03.
Start up, wiring revision A.
5
1.2 %
20
2.7 %
10
1.7 %
15
2.25 %
30
4.0 %