Énergie Transfert Thermique Technical instructions A different climate Environmental control solutions Version
IMPORTANT The warranty of ETT units depends on the respect of these technical instructions as stipulated in ETT's General Terms of Sales. The maintenance shall be done by a specialized company. Please change and clean filters as often as possible. Our equipments will surely meet your expectations. We hope you will enjoy using them.
Energie Transfert Thermique ummary A. Maintenance and frequency... 05 B. Specific maintenance recommendations... 06 C. Specific use recommendations... 07 D. Use of the controller... 0 E. Assistance for diagnostic and repairing... 11
Technical instructions A. Maintenance and frequency Please remember: > ETT provides you the maintenance book of the unit to follow and organize maintenance operations described thereafter. > The use of ETT warranty necessitates a total respect of maintenance and use recommendations indicated in this document. > Units service life and efficiency depends on the respect of all maintenance and use recommendations. Frequency: Q (Quarterly), H (Half-yearly), A (Annually) Benefits: Q H A General control: Casing control Drainage and condensates evacuation cleaning Operating time report Securities control Ventilation: Filters replacement or cleaning (4 mm thickness filters) Filters replacement or cleaning (6 mm thickness filters) Servomotors and dampers control Control and cleaning of fans turbines Fans and motors pulleys control and tightening (if concerned) Fans bearings control (if concerned) Fans rotation speed and air flow rates control Ventilation motors control Control of belts and their tension (if unit with belts) Change of belts (if unit with belts) Fans motors intensities report Propellers fans control (if concerned) Propellers fans motors intensities report (if concerned) Refrigerant circuits: Circuit tightness control (Unit load >2kg A >30kg H >300kg Q ) Refrigerant load control & adjustment if necessary Compressor control Compressor(s) parameters settings Compressor(s) intensities control Pressures control: HP and LP Temperatures control: gas and liquid Refrigerant to air exchangers cleaning and control Control of expansion valves 4-way valve(s) control (if concerned) Heating (if concerned) Hot water coil control Water quality in the hot water coil control 3-way valve operation control Electric heaters control Warm air heaters control (50 to 400 kw capacity) Warm air heaters control (more than 400 kw) 5
Technical instructions Frequency: Q (Quarterly), H (Half-yearly), A (Annually) Benefits: Q H A Electricity / Control: Controller control Clock hand settings points control Electrical connections tightening Temperature sensors control Gas probe Pressure probe Coalescing filters cleaning Control of firestop valves Ducts Control of ducts Control of screw-down flanges Gaskets tightness control Check of the equipotential bondings Smoke detector head (DAD) cleaning Smoke detector head replacement Nota: This period is given as an example and can be shorter in case of polluted atmosphere. Replacement of the smoke detection box battery Hygrometry probes replacement (if concerned) CO 2 probes replacement (if concerned) Every 2 years Every 2 years Every 2 years Every 2 years B. Specific maintenance recommendations 1/ Exchangers cleaning Clean them using a bristle scrub brush, a vacuum or a compressed air jet if necessary. Rinse with cold and low pressure water, avoiding spatters on the fan motor. Clean in counter flow of the air flow way. 2/ Filtration Be careful, a bad filtration or an important fouling can damage the unit efficiency and refrigerant circuit. Nota: Those filters cannot be cleaned more than 2 or 3 times. After that, they are less efficient. Do not keep a filter after 3 regenerations. If a filter cannot be regenerated, change it. Metal filters regeneration > Clean them with warm water and liquid detergent. > Rinse them after cleaning and dry them using compressed or current air. > Coat again the filtering equipment with "filter-coat" or something similar, to give its properties back. > Check that filtering elements are correctly installed while reassembling them. "Tissue" filters regeneration > Use the same method than metal filters to clean and dry them. > Reassemble them in the support frame. 6
Technical instructions 3/ Fans bearings Many ETT units centrifugal fans have ball bearings, life-greased, without need of maintenance. However, a clearance control in bearings is necessary. > We advise you to control and add grease each quarterly period for fans with grease fitting. > Our fans bearings have generally a 100.000 hours lifetime. 4/ Particularities of corrosive / salt areas > Bearings and fans shafts greasing each month (whatever the type). > Control and cleaning of fans each month. > Exchangers cleaning with clear water each month. > Coalescing filters cleaning. 5/ Cleaning of the DAD head It is necessary to control periodically the operation according to the regulation in force for the building. For type 1 DAD (DAD S6), a control of the secondary source must be done monthly by pressing the "secondary source test" button during at least 5 seconds. The "Under voltage" indicator must stay switched on. 6/ Coalescing filters cleaning (DSH) Please consult the equipments specifications (HVA13). C. Specific use recommendations 1/ Cooling system register (EN 37-2) When there are more than 3 kg of refrigerant, a register concerning the cooling system must be created and updated by the concerned party. A register must be prepared during the installation of the system by the installer. As indicated in the EN 37-4, it must be constantly updated after maintenance. The register indicates those information: A. Details concerning all maintenance and repairing interventions B. Quantities and nature (new, reused, recycled) of the refrigerant loaded during each intervention. Refrigerant quantities transferred during each intervention (it is also possible to consult the EN 37-4) C. If the reused refrigerant is analysed, it is necessary to keep the results in the register D. The reused refrigerant origin E. The system components changes and replacements F. All routine periodic tests results G. Times during which it is not used. 7
Technical instructions 2/ Use of refrigerant It is necessary to respect the EC No.42/2006 Directive while using refrigerants: - Operators must be trained and authorized to manipulate refrigerants. - The company employing the operator must have a certificate of competency giving the right to its staff to manipulate refrigerants. - It is important to control and declare refrigerants leakages according to the installation load.! Warning: Please respect the security rules given by the refrigerant suppliers concerning the use of refrigerants. 3/ Unit temporary stop A. Stop the unit. B. Keep the evaporator reheater (air to water, water to water PAC (heat pump)) and the pipelines reheaters under voltage if it is not automatic and if the unit is in a place in which there might be temperatures under 0 C. 4/ Starting after a temporary stop There is no particular precautions. The unit starts by reversing the actions in the paragraph: "Unit temporary stop". 5/ Unit seasonal stop A. If the heat pump has water circuits, drain them. If the unit is in a place in which there might be temperatures under 0 C, drain the connection pipelines. B. Open the main switch. Remove the fuse block or lock the main switch in opened position. C. If the heat pump is in an area in which there can be condensation, it is necessary to put oil on mechanical pieces that can become oxidized (fan bearings, rollings, pulleys, etc.). 6/ Seasonal start A. Respect the actions written in the "Annually" paragraph, in the "Maintenance" chapter. B. If necessary, fill up the water circuits and drain the air inside them. C. Open completely the compressor backflow valve. D. Open the stop valve of the liquid line (eventually). E. Check the whole refrigerant circuit tightness. F. Switch on the system main disconnector. G. Fix the control unit (if concerned). H. Wait for the compressor crankcase heaters preheating (72 hours). I. Start the system. J. Check the operation of the equipments connected together. K. Check the oil level and the service pressures after the operation of the system during 15 to 20 minutes. The refrigerant flow rate must be regular. There must not be bubbles.
Technical instructions 7. Generating sets A "clean" stop of the unit is necessary if the unit is supplied using a generating set (please consult "Unit temporary stop" for more information). It can be managed manually or by programming a BMS according to the information given by the energy supplier, in case of peak-day load reductions. The unit can be damaged and components broken (electric components, compressors) in case of non respect of this point. In this case, the ETT warranty cannot be used. D. Use of the controller 1/ Starting-up or stopping the unit 5 seconds. Press "ENTER" during 2/ Faults fixing Press "ALARM" to see the fault. Correct the fault on the component concerned (DAD reset, fire thermostat or freezestat reset, start of thermal protection, etc.) Press "ALARM" during 5 seconds to fix the fault. 3/ Access to level 0 - User settings Access to menus: - points - Operating hours - Clock settings Press the arrows simultaneously during 2 seconds Password = 0 Choose the desired menu by using the arrows Choose the desired mask by using the arrows Press "ENTER" to access to the setpoints Choose the setpoint that needs to be changed by using the arrows Press "ENTER" to the desired menu Press "ENTER" to access to this setpoint
Technical instructions -up the setpoint by using the arrows to the main mask Press "ESC" to come back 4/ Access to level 1 - Maintenance - Maintenance Access to menus: - Communication - Alarm History - Energy meter - Inputs - Outputs - Counter reset Press the arrows simultaneously during 2 seconds Password = 1 Press "ENTER" to the desired menu Choose the desired menu by using the arrows the desired mask by using the arrows Choose to the setpoints Press "ENTER" to access Choose the setpoint that needs to be changed by using the arrows Press "ENTER" to access to this setpoint -up the setpoint by using the arrows Press "ESC" to come back to the main mask 10
Technical instructions E. Assistance for diagnostic and repairing 1/ Smoke fault Smoke detection Detection head fouling Saving battery out of service - Control of presence of smokes or dusts - Head cleaning - Change of head - Fault fixing (Consult D.2) - Control of presence of smokes or dusts - Head cleaning - Change of head - Fault fixing (Consult D.2) - Change of battery 2/ Filter fault Fouled filters Fouled exchangers - Filters cleaning - Change of filters - Exchangers cleaning according to the recommendations 3/ Air flow rate fault Fouled filters Leakage on air network Transmissions problem Air network fouled - Filters cleaning - Change of filters - Air distribution network fixing - Transmissions settings - Air distribution network cleaning 4/ Fire fault Lack of air flow rate Transmission problem Thermostat problem - Check filters - Check the fan and its motor - Check the transmission - Check the thermostat 11
Technical instructions 5/ Antifrost fault Lack of air flow rate Transmission problem Thermostat problem Lack of hot water - Check filters - Check the fan and its motor - Check the transmission - Check the thermostat - Check the boiler house and the pump 6/ Inverters faults Fault with intensity - Check the eventual presence of micro cuts on the power supply system 7/ Low pressure fault Bad air flow rate Low pressure switch malfunction Fouled filters Expansion valve malfunction Bad defrosting Problem of load of refrigerant - Consult air flow rate faults actions (Consult E.3) - Pressure switch operation control - Pressure switch connections control - Filters cleaning - Change of filters - Expansion valve control (status, settings, operation) - Check the refrigerant circuit probes - Check the 4-way valve - Check the defrosting settings - Tightness control / High pressure fault Bad air flow rate High pressure switch malfunction Fouled filters Outside T out of application range Bad air distribution - Consult air flow rate faults actions (Consult E.3) - Pressure switch operation control - Pressure switch connections control - Filters cleaning - Change of filters - No action - Air distribution network control 12
Technical instructions / Refrigerant circuit fault A. The compressor does not start. Electrical protection faults Control security Abnormal supply voltage Propeller fault - Protections control - Control parameters control - Securities control - Controller reset if authorized - Phases control - Control of the voltage drop during the unit start-up - Control of the power supply chain (wire, connections, contactor, etc.) - Propellers control B. The compressor stops. Low pressure faults - Consult E.7 High pressure fault - Consult E. Ipsotherm fault Thermal fault Power supply chain broken Propeller fault - Control of the compressor cooling - Control of the ipsotherm probe - Filters fouling control - Compressor absorbed current control - Control of the starting voltage drop - Control of the power supply chain (wire, connections, contactors, etc.) - Propellers control C. The compressor makes noise. Knocks Sluggings Grunts - Control the compressor suction pressure - Control valves status - Overheating control - Control of expansion valve bulb fixation - Control of the supply voltage - Phases control - Galling => broken part D. The compressor does not stop. point temperature too much different from the advised temperatures Glued contactor - point temperatures control - Contactor control 13
Technical instructions E. Lack of capacity. The expansion valve whistles Important overheating Pre-expansion Wrong flow rates - Expansion valve settings control - Load control - Expansion valve settings control - Load control - Drier filter control - Flow rates control 10/ Please consult the unit FA for the other faults. 14
T r a n s f e r t T h e r m i q u e Design: ETT - Document printed by an environmentally friendly printer using vegetable based ink on PEFC paper created from sustainably-managed forest. É n e r g i e A different climate Environmental control solutions 56 route de Brest - CS 3002-230 Ploudalmézeau - France Phone number: +33 (0)2 4 14 22 - Fax: +33 (0)2 4 0 12 Export contact: +33 (0)2 4 00 70 - ETT Services: +33 (0)2 4 02 22 www.ett.fr