Specifications

9
Easy maintenance
R2-Series systems allow an indoor unit to be serviced,
while other indoor units within the same piping system
are still in operation. Note that this does not apply to all
situations and proper procedures must be followed
when servicing any equipment.
100% INVERTER-driven,
like no other
The compressor varies its speed to match the indoor
cooling or heating demand and, therefore, only consumes
the energy that is required.
When an INVERTER-driven system is operating at partial
load, the energy efficiency of the system is significantly
higher than that of a standard fixed speed system.
Fixed speed systems can only operate at 100%, however,
partial load conditions prevail for the majority of the time.
Therefore fixed speed systems cannot match the annual
efficiencies of INVERTER-driven systems.
Using only one INVERTER-driven compressor per outdoor
unit module, the CITY MULTI outdoor units provide low
starting currents (only 15 amps for a THMU-A outdoor
unit), and smooth transition across the range of compres-
sor frequencies. Minimum capacity control ranges from
six percent to 17 percent depending on outdoor
unit systems.
The outdoor unit combinations comprise one unit for
P72-P120 models (R2 and Y-Series), two units for
P144-P240 models systems (R2 and Y-Series) and three
units for P264-P360 models (Y-Series only). Each outdoor
unit model features one INVERTER-driven compressor,
making simple and highly reliable control possible.
Not only does it allow low starting currents, the INVERTER-
driven compressor also provides precise indoor comfort
and adapts to the air-conditioning load as needed.
Additional Features
Adjustable high static pressure, standard
R2-, Y- and H2i
™
Y-Series feature adjustable static pressure up
to 0.24” W.G., ideal and flexible for any type of application.
Static pressure setting is adjustable by changing a dip switch
making it ideal and flexible for any type of application. Default
setting is 0” W.G. with options 0.12 and 0.24” W.G.
Long line length
The modular chassis for both the R2- and Y-Series outdoor units
allows for an increased line length to the connected indoor units.
Up to a total combined length of refrigerant piping up to 2,624 feet
for R2-Series and up to 3,280 feet for Y-Series one way.
Back-up and
outdoor unit rotation
Back-up Function
(combined module systems)
The combined modular outdoor unit
design ensures an exceptionally high
level of reliability by utilizing a back-up function, which can be
easily operated in the unlikely case of a malfunction from an
indoor unit remote controller.
Rotation Function
(combined module systems)
Running outdoor units alternatively with
the ‘Rotation Function’, the system is
able to ensure an optimum product life
cycle for both of its component units.
System check
Ensuring simple and easy maintenance, system tests are
available to check wiring, sensors and the refrigerant amount.
OUTDOOR UNITS
Back-up Function
Rotation Function
100%
17%
15Hz Cooling:18-75Hz
Heating:15-88Hz
Heating / Cooling Capacity
Linear Capacity
Control
Compressor Frequency
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