INSTALLATION, OPERATION AND MAINTENANCE MANUAL
FW cooling only range – Monosplit single-phase
Caution: the use of a manual that is not up to date with the condensing unit version does not
engage the responsibility of LTB
CUs are designed to operate when fed with tap water with a temperature of +15°C and a pressure of 4 bar,
with a wide tolerance around these values.
The rated water flows (eg, to provide the rated cooling capacity) of CUs are summarized in the tables below:
Rated water flow for a water inlet temperature of +15°C
Rated water flow for a water inlet temperature of +30°C
9 INSTALLATION: ELECTRICAL CONNECTION OF THE CU
The installation must be carried out by a person with the appropriate skills and qualifications.
The installation must be switched off before any intervention, by cutting the power supply of the CU.
The choice of the cables must be made by the installer to comply with the standards in force at the time of
installation. Among others, the installer will have to pay attention to the electrical powers absorbed in all life
phases of the installation. The installer must also mount the necessary protections.
The CU provides power to the IU. The selection of the CU power supply cable must therefore take into account
the presence or absence of the "electrical heating" function on the IU. Suggestions regarding the supply cables
of the CU are given in the table below, but the final decision remains the responsibility of the installer.
CU power cable when IU is without electrical heating
CU power cable when IU is a cassette with electrical heating
Max. current [A] (cooling
mode)
Max. current [A] (heating)
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