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INSTALLATION, OPERATION AND MAINTENANCE MANUAL
V6
FW cooling only range – Monosplit single-phase
INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
FW RANGE – Water condensing units
Cooling only
Monosplit
Single-phase
FW07Q6 – FW09Q6 – FW14Q6 – FW18Q6 – FW24Q6 – FW36Q6
Caution: the use of a manual that is not up to date with the condensing unit version does not
Page 1 / 17
engage the responsibility of LTB
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Summary of Contents for LTB FW14Q6
- Page 1 Cooling only Monosplit Single-phase FW07Q6 – FW09Q6 – FW14Q6 – FW18Q6 – FW24Q6 – FW36Q6 Caution: the use of a manual that is not up to date with the condensing unit version does not Page 1 / 17 engage the responsibility of LTB...
- Page 2 1 INTRODUCTION The present document constitutes the installation, operation and maintenance manual for the following water condensing units: FW07Q6 (model code WQF101). FW09Q6 (model code WQF102). FW14Q6 (model code WQF103). FW18Q6 (model code WQF104). FW24Q6 (model code WQF105).
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Page 3: Description Of The Unit
INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 3 DESCRIPTION OF THE GOODS Each CU is supplied with: A wall mount fixing rail. 2 water connection flexible hoses with 4 flat washers. An installation, operation and maintenance manual containing the electrical drawing and the commissioning form 4 DESCRIPTION OF THE UNIT HP service valve... - Page 4 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase Grommet for electrical connection Water outlet Water inlet Suction flare valve Liquid flare valve Each CU model exist in 4 versions specified by its option pack which corresponds to the last two digits of the article code (the first 6 being the model code): WITHOUT WITH...
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Page 5: Installation Of The Units
INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 5 FLUIDIC DIAGRAM 6 INSTALLATION OF THE UNITS This section explains how to choose the location to install and set up the CU. Concerning the IU, please refer to its own documentation (supplied with the IU). Choice of location: Make sure the support on which the CU is installed is solid. - Page 6 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase The service spaces are as follows : FW 07 to 24 FW 36 Setting up : It is possible to install the CU in two ways: First possibility: hanging the CU against a wall using its back mounting rail (supplied with the CU) : ...
- Page 7 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 7 INSTALLATION : FRIGORIFIC CONNECTIONS All the usual precautions should be taken when setting up the refrigerant connections. In particular, it is necessary to limit the number of bends, to make a 2% gradient on the suction line and to make the necessary oil traps in order to have a good oil circulation.
- Page 8 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 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 Size FW...
- Page 9 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase CU power cable when IU is a ducted indoor unit with electrical heating Size FW Section [mm²] 3 x 2.5 3 x 2.5 3 x 2.5 3 x 2.5 3 x 4.0 3 x 6.0 Max.
- Page 10 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase Below an example of a CU’s electrical panel: Compresseur capacitor C1 Control circuit protection F2 Compressor Auto HP relay contactor K1 T2 timer (with T1 timer (with Terminal block optional LP) optional LP) Timers T1 and T2 are present when the condensing unit is delivered with the LP switch option.
- Page 11 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 10 INSTALLATION : FILLING OF REFRIGERATING GAS The intervention must be carried out by a person with the appropriate skills and qualifications. In particular, it must have the certificate of suitability for the handling of refrigerants. In addition, the company employing this person must have a certificate of ability.
- Page 12 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 11 USE : UNIT START-UP This paragraph applies to both the first start-up and the post-intervention startups. The intervention must be carried out by a person with the appropriate skills and qualifications. In particular, it must have the certificate of suitability for the handling of refrigerants.
- Page 13 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 12 USE : FREQUENT PROBLEMS Below is a table listing the common defaults: Default Probable causes Action to be taken Check voltage No power supply The installation does not turn on Check position of the disconnecting switch Bad wiring Check wiring...
- Page 14 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase The correct setting of the pressostatic valve is the one that leads to the following condensing temperatures: FW 07 Q6 FW 09 Q6 FW 14 Q6 FW 18 Q6 FW 24 Q6 FW 36 Q6 Condensing temperature...
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Page 15: Maintenance
INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 15 MAINTENANCE The maintenance must be carried out by a person with the appropriate skills and qualifications. The maintenance frequencies are to be adapted according to the environment and the context of the use of the split sytem, with at least one maintenance every year. -
Page 16: Electrical Drawing
INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 16 ELECTRICAL DRAWING OPTIONS: TERMINAL BLOCK CONDENSING UNIT: Options are mentioned in dotted lines G – Earth A – Main switch L/L1 - Phase B – Automatic LP switch N –... - Page 17 INSTALLATION, OPERATION AND MAINTENANCE MANUAL FW cooling only range – Monosplit single-phase 17 INSTALLATION: CHECK THE CONFIGURATION OF THE IU The installation must be carried out by a person with the appropriate skills and qualifications. When installing the indoor units, the installer must check the proper configuration of the switches on the printed circuit board specific to each type of cassette* or ducted indoor unit.
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