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. One is required for
each of the two systems.
COMMISSIONING
Indoor Unit
1. Check that the thermostat is correctly
wired and set at the desired
temperature.
2. Check that any air filter (if fitted) is
clean.
3. Check that the fan runs freely without
vibration.
4. Check the airflow at each air outlet
(diffuser) and adjust if necessary.
5. Check condensate drain for free
drainage.
6. Run the unit in cooling mode and, if
applicable, heating mode.
MAINTENANCE
Weekly For First Four Weeks
1. Check air filter (if fitted); vacuum clean
as necessary.
2. Check condensate drain for free
drainage.
Monthly
Check air filter (if fitted); vacuum clean as
necessary.
Six Monthly
1. Check condensate drain for free
drainage.
2. Check heat exchanger coil; vacuum or
brush clean as necessary.
3. Check the tightness of the fan, motor
mountings, pullley and belt tension.
4. Check that fan motor is free running.
5. Check tightness of electrical
connections.
6. Check air supply at diffuser outlets.
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.
This pamphlet replaces the previous
issue no. 1891 dated 10/01.
Wiring revision A.
NOTE
The manufacturer reserves the right to
change specifications at any time without
notice or obligation. Certified dimensions
available on request.
07/05 Pamphlet No. 1891 © temperzone limited 2005
