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1.- GENERAL CHARACTERISTICS
1.7.- AVAILABLE OPTIONS
MAIN SWITCH
The main switch is located on the access panel to the electrical box in such a way that the unit is disconnected
when the panel is opened.
(Refer to the size diagram on pages 7 to 10 to see the position of the electrical box access panel).
Check to make sure that the main switch is large enough to handle the current for the unit if electric heaters are
installed.
PHASE SEQUENCER (THREE-PHASE UNIT)
The phase sequencer is located in the electrical box in the outdoor section, thus assuring that the unit will not
begin operation while the phase connection of the compressor is not correct. Should this occur, then just switch
two phase connections.
ON/OFF CONDENSATION PRESSURE CONTROL (MODELS 10-12-16)
The condensation pressure control consists of a pressure switch, which starts and stops the outdoor fan regulating
the condensation temperature, thus the unit will be able to operate in the cooling cycle when the outdoor
temperature is below 19ºC.
HOT GAS BYPASS VALVE
The purpose of the BYPASS valve is to make it possible for the unit to operate at low outdoor temperatures (under
0°C), to be used in cooling-only and head-pump units.
It regulates the capacity of the compressor by injecting hot gas from the compressor discharge side to the
evaporator.
CRANKCASE HEATER (COOLING-ONLY UNITS)
When the unit is operating at low outdoor temperatures it is advisable to fit a crankcase heater.
The purpose of the heater is to keep the oil in the compressor at the correct temperature while the compressor is
stopped so that it can be properly lubricated when started again.
SOUND MUFFLER
Available for models 16, 22, 24, 28, 30.
Field assembled, designed to be installed at the extractor
opening of the outdoor unit in order to reduce noise, particularly
when the outdoor unit is installed without ducts, free discharge.
This kit contains the sound muffler and adapter parts for fixing
it to the unit.
OUTDOOR MOUNTING KIT
Sound muffler Adapter parts
Field assembly.
This kit is comprised of an air filter and grille for outdoor air
Air filter
intake which should be installed on the suction side of the
outdoor unit, and the anti-rain hood which should be installed
on the discharge side of the outdoor fan.
OUTDOOR AIR FILTER KIT
Field assembly.
The outdoor air filter should be installed on the outdoor air inlet
of the outdoor unit and is recommended when working in
Outdoor air intake
heavily contaminated areas that may soil or clog the coil.
Anti-rain hood
11
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