Technical instructions

Transcription

1 Énergie Transfert Thermique Technical instructions Double fl ow dehumidifi er DESHU

2 Energie Transfert Thermique Contents A. Equipment performance... 3 B. Maintenance intervals... 3 C. Regulatory requirements... 5 D. Specifi c maintenance recommendations... 7 E. Starting/Stopping the unit...11 F. Controller operation...12 G. Diagnostics and troubleshooting support...15 Information contained in this document has been prepared by qualified ETT specialists. We are doing our best to ensure its completeness and accuracy but it does not constitute a guarantee. This information is given in good faith, any use of the equipment not in accordance with the instructions and warnings is done at the user's own risk. 2

3 A. Equipment performance The validity of the guarantee is conditional upon strict compliance with instructions presented in this document. Proper operation and maintenance: > maintains units performance; > extends equipment service life; > reduces the risk of unit failure; > allows energy costs management; > ensures regulatory compliance (compulsory checks based on local regulations). ETT Services is here to help you get the most out of your installation. 33 () ett.services@ett.fr Contact your local ETT Services adviser. B. Maintenance intervals Maintenance intervals: Q (Quarterly), S (Semi-annually), A (Annually) Operations Q S A General control Check casing Clean siphons and condensate drain Operating time report Electricity / Control Check controller Set clock and operating schedule Check setpoints Tighten electrical connections Check temperature probes Replace humidity probes sensor element (if applicable) Consumables Clean or replace fi lters (1) Replace smoke detector head Nota: Maintenance intervals are given as indication only. Replacement may be needed more frequently in polluted atmospheres. Replacement of the smoke detection box battery Replace humidity probe and/or sensor element (if applicable) 48 mm 98 mm Every 2 years Every 2 years Every 2 years MARK-NOT_13.3-EN 3

4 Servomotors and dampers control Control and cleaning of fans turbines Maintenance intervals: Q (Quarterly), S (Semi-annually), A (Annually) Operations Q S A Ventilation Grease fan bearings or control fan bearings grease cartridges and replace is necessary Fans rotation speed and air fl ow rates control Nota: In case of insuffi cient fl ow rate, apply recommendations described in Specifi c maintenance recommendations, p. 7 Check air ducting (cleanliness, cones, valves, etc.) Ventilation motors control Control of belts and their tension (if unit with belts) Change of belts (if unit with belts) Fans motors intensities report Check ventilation safety devices (fl ow rate, fi lters fouling, fi re contact, smoke detector, post-ventilation, etc.) (1) Check oil level, adjust if necessary Compressor(s) intensities control Check pressures: HP and LP Control superheat and subcooling Check and clean refrigerant-to-air exchangers (1) Check expansion valve, adjust if necessary Electronic expansion valves: check parameters 4-way valve(s) control Refrigeration circuits Check refrigeration safety devices (HP & LP pressure switches, thermostats, etc.) Auxiliary condenser: check and adjust water fl ow rate Tighten refrigeration pipe clamps: adjust or replace if necessary Regulatory controls Leakage checking (based on unit t CO 2 e) (2) >5 >5 >5 Pressure equipment inspection (2) Pressure equipment certifi cation (2) Inspection of air-conditioning systems and heat pumps (2) Check hot water coil (cleanliness, tightness) Check water quality in hot water coil Heating (if applicable) Every 4 months Every 1 years Every 5 years Check 3-way valve operation (3) Check electric heaters (3) Check hot water coils (1) 4 MARK-NOT_13.3-EN

5 Maintenance intervals: Q (Quarterly), S (Semi-annually), A (Annually) Operations Q S A Check heat pipe effi ciency by measuring temperatures Check heat pipe jack operation (if applicable) Clean heat pipe Heat pipe (if applicable) (1) Rotary exchanger (if applicable) (1) Check heat exchanger effi ciency by measuring temperatures Control brushes / gaskets tightness Check heat exchanger drive motor (1) Check heat exchanger belt and belt tension Check bearing greasing (if not life-time lubricated) Corrosive/saline atmospheres Check and clean aluminium drift eliminator (which retains potential large salt or sand particles from outside) Clean or replace G4 fi lters or washable fi lters PRP3 Clean or replace fi ne F7 fi lters or F9 polypropylene fi lters (also called coalescer fi lter), do not hold the fi breglass media The fi lter can be cleaned at least twice (desalinate in a tray and dry). Nota: See Filtration, p. 7. Check and clean refrigerant-to-air exchangers (SAKAPHEN coating) - clean with high pressure water Grease fan bearings and shaft (whatever the type). Check and clean fans monthly. Clean heat exchangers with clear water monthly. (1) See Specifi c maintenance recommendations, p. 7. (2) See Regulatory requirements, p. 5. (3) In Heating mode. Monthly Monthly Monthly Monthly C. Regulatory requirements 1/ Refrigerating system log book (EN 378-2) Each system having a refrigerant charge, with a CO 2 equivalent of 5 tonnes or above, requires its own separate log book to be maintained. The logbook shall be prepared by the installer during installation. It shall be updated after every maintenance operation, as indicated in EN standard. Log books shall include the following information: > detailed report of each maintenance or repair operation; > quantity and nature (new, reused, recycled) of refrigerant added during the operation; > quantity of refrigerant transferred during the operation (see also EN standard); > results of reused refrigerant analysis (if such analysis was performed); > origin of reused refrigerant; > system components replaced or modifi ed; > routine or periodic tests results; > signifi cant non-use periods. MARK-NOT_13.3-EN 5

6 2/ Check tightness In application of EU regulations, the French decree of 29 February 216 on certain refrigerants containing fl uorinated greenhouse gases states that equipment containing such refrigerants must be periodically checked for leakage (see table hereafter) by certifi ed personnel and a tightness control certifi cate must be issued. Leak check intervals Checking frequency Once a year Twice a year 4 times a year Metric tonnes of CO 2 equivalent 5 to 5 5 to 5 >5 R134a Refrigerant charge (kg) 3.5 to 35 kg 35 to kg >349.7 kg Fluid R47c Refrigerant charge (kg) 2.82 to 28.2 kg 28.2 to kg > kg R41a Refrigerant charge (kg) 2.39 to 23.9 kg 23.9 to kg > kg A label must be attached to the equipment: Blue label if the equipment complies with the requirements: > The operator who performed the inspection must specify his qualification certificate number in the text area provided at the centre of the label. > The label indicates the expiry date of the control certificate. Red label if a leak is detected and the operator cannot stop it. > The equipment shall not be charged with refrigerant until proper repairs have been carried out. 3/ Refrigerant handling Refrigerant handling must comply with French Decree no and European legislation: > Technicians must be trained and must hold the relevant F-gas qualification. > The company employing the operator must hold an F-gas Company Certificate authorising its personnel to handle refrigerant. > Refrigerant leaks must be handled and declared according to the installation refrigerant charge. 6 MARK-NOT_13.3-EN

7 4/ Pressure Equipment Directive Although refrigeration installations fall within the pressure equipment category, they are a special case in terms of in-service monitoring. In 214, the French safety offi ce of industrial equipment (BSEI) validated a Technical Guidebook (CTP USNEF - Available on-line in French), which authorises waivers from the French decree of 15 March 2 (amended). > Refrigeration installations shall be verified within 3 months of commissioning. Initial verifi cation shall be performed by an authorised person, under the responsibility of the operator. > Refrigeration installations shall be inspected at least every 4 months. Periodic inspection shall be performed by an authorised person, under the responsibility of the operator. > Refrigeration installations shall be requalified every 1 years. Periodic requalifi cation shall be performed by an authorised body which shall issue a requalification certificate. To avoid damage to the installation, the hydraulic test is not required. 5/ Inspection of reversible heat pumps and air-conditioning systems Decree of 31 March 21 The inspection shall include documentary controls and an assessment of system effi ciency and sizing compared with the cooling requirements of the building. The inspection shall be performed: > by an authorised person; > at the owner s initiative; > at least every 5 years. In case of replacement, the new equipment shall be inspected in the calendar year following replacement. D. Specific maintenance recommendations 1/ Heat 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 fl ow of the air fl ow way. 2/ Recommendation: influence of water composition on resistance to corrosion The resistance to corrosion of copper and stainless steel in water exchangers depends on a number of chemical factors. The table below gives an overview of the corrosion resistance in water of AISI 316 type stainless steel and pure copper (99.9%). However, it is important to keep in mind that corrosion is actually a very complex process that can be infl uenced by many different factors and their combination. To avoid any risk of corrosion, the customer must provide water of suffi cient quality (see table below). If not, ETT will not be liable for any corrosion-related damage. MARK-NOT_13.3-EN 7

8 Elements present in water Concentration (mg/l or ppm) Alkalinity (HCO3) < < 3 Sulphates (1) (SO4 2- ) < < 3 HCO3- / SO4 2- > 1. < 1. Electrical conductivity < 1 μs/cm 1 5 μs/cm > 5 μs/cm ph (2) < > 9. Ammonia (NH3) < > 2 Chlorides (CI) < 3 > 3 Free chlorides (CI2) < > 5 Hydrogen sulphides (H2S) Carbon dioxide (CO2) Total hardness ( dh) <.5 >.5 < > 2 Nitrates (1) (NO3) < 1 > 1 Iron (3) (Fe) <.2 >.2 Aluminium (Al) <.2 >.2 Manganese (3) (Mn) AISI 316 / / COPPER / / - - / - / / - / <.1 >.1 Chlorides Content Maximum temperature 6 C 8 C 12 C 13 C 1 ppm AISI 34 AISI 34 AISI 34 AISI ppm AISI 34 AISI 34 AISI 316 AISI ppm AISI 34 AISI 316 AISI 316 Ti 8 ppm AISI 316 AISI 316 AISI 316 Ti 15 ppm AISI 316 AISI 316 Ti Ti 3 ppm AISI 316 Ti Ti Ti > 3 ppm Ti Ti Ti Ti Legend key: : Good resistance under normal conditions of use : Corrosion can be a problem, especially if several factors are rated -: Use is not recommended Selection of plates material AISI = type of stainless steel Ti = titanium (1) Sulphates and nitrates act as inhibitors for the pitting corrosion caused by chlorine in ph-neutral environments. (2) Usually, a low ph value (below 6) increases the risk of corrosion whereas a high ph value (above 7.5) decreases the risk of corrosion. (3) Fe3 and Mn4 are strong oxidizing agents that can increase the risk of localized corrosion on stainless steels. If O2 is above 15 ppm, the risk of scaling is higher. 8 MARK-NOT_13.3-EN

9 3/ Filtration Poor fi ltration or signifi cant fouling can affect unit effi ciency and damage the refrigeration circuit. Nota: Filters cannot be cleaned more than 2 or 3 times. Otherwise, fi ltration performance is dramatically reduced. If a fi lter cannot be regenerated, replace it. 4/ Air flow rates control Insufficient air flow rates can have several consequences: > The compressor operates out of the permitted operating range. Ü Risk of compressor breakage > Heat from auxiliary heaters is not evacuated. Ü Risk of fi re alarm > The setpoints are not reached. Ü Lower heating capacity In case of insufficient air flow rates: > Check supply air dampers operation; > Check fi lters for fouling; > Check exchangers for fouling; > Check air ducts (fi re dampers, fouling in ducts, cone connectors). 5/ Heat pipe or rotary heat exchanger efficiency control 5.1/ Necessary conditions > Stop compressors and auxiliaries. Only ventilation shall be activated. > Outside temperature must differ from return air temperature in order to identify energy recovery through the heat pipe or rotary heat exchanger. 5.2/ Control procedure > Check fresh air and supply air temperatures on the controller. > If fresh air and supply air temperatures are the same, the heat pipe or rotary heat exchanger failed to transfer energy. Heat transfer effi ciency has diminished. 5.3/ Corrective measure > Clean the heat pipe or rotary heat exchanger. > On heat pipes, cleaning does not improve effi ciency. Check tightness. 5.4/ Heat pipe/rotary heat exchanger operating principle Example: Heating mode Fresh air Supply air Exhaust air Return air MARK-NOT_13.3-EN 9

10 6/ Cleaning procedure: HPE polypropylene filters (F7-F9) Caution: When cleaning fi lters, always wear appropriate protective equipment: glasses, gloves and mask. 6.1/ Cleaning with water > Lay the fi lter horizontally on the fl oor. > Clean with non-pressurised water using a fl at jet nozzle. Hold the nozzle 2 cm (6 ) from the fi lter to avoid damage. > Spray water in the direction of the pleats and rinse thoroughly the fi brous material. > Clean the whole surface of the fi lter during approximately 1 minute. > Turn the fi lter over and repeat the procedure on the other side. > Detergent may be used for better cleaning. > Drying time will vary based on ambient temperature and humidity conditions. Nota: Be sure the fi lter is completely dry before replacing it into the unit. A fi lter can be cleaned twice without affecting fi ltration effi ciency. 6.2/ Cleaning with air > Lay the fi lter horizontally on the fl oor. > Use a compressed air gun. > Hold the nozzle 15 cm (6 ) from the fi lter to avoid damage. > Spray air on the whole surface, in the direction of the pleats during approximately 45 seconds. > Turn the fi lter over and repeat the procedure on the other side. 7/ Actuating detector control Operation must be controlled periodically, according to regulations applicable to the building. For type 1 detectors (S6), the secondary source must be controlled monthly by holding the "secondary source test" button for at least 5 seconds. The "power" indicator must remain switched on. Perform a functional test using an aerosol smoke detector tester. Follow manufacturer's instructions. 1 MARK-NOT_13.3-EN

11 E. Starting/Stopping the unit 1/ Unit temporary shutdown > Stop the unit. > Do not shut off power to the evaporator crankcase heater (air-to-water, water-to-water heat pump) or to the line heaters if the unit is installed in an area where the temperature is likely to fall below C. This operation is not handled automatically. 2/ Start-up after temporary shutdown No special precautions are required. To start the unit, reverse the procedure outlined in Unit temporary shutdown, p / Unit seasonal shutdown > If the heat pump includes water circuits, drain them. Also drain the connection lines if the unit is installed in an area where the temperature is likely to fall below C. > Open the main power switch. Remove the fuse block or lock the main switch in opened position. > If the heat pump is installed in an area subject to condensation, it is recommended to spray oil on mechanical parts which are likely to rust (fan bearings, pulleys, etc.). 4/ Seasonal start-up > Perform annual maintenance operations according to Maintenance intervals, p. 3. > Fill the water circuits and bleed the air out as necessary. > Fully open the compressor discharge valve. > Open the liquid line stop valve (if applicable). > Control refrigeration circuit tightness. > Switch on the main power switch. > Acknowledge faults on the detection station (if applicable). > Allow the compressor crankcase heaters to preheat (12 hours). > Start the system. > Check operation of all interconnected devices. > Check oil level and operating pressures after 15 to 2 minutes of operation. > Make sure that refrigerant fl ows in a steady stream with no bubbles. 5/ Generating set - EJP (peak load reduction) Equipment powered by a generating set must be correctly stopped. Refer to the procedure detailed in Unit temporary shutdown, p. 11. This can be managed manually or by programming the BMS according to feedback from your energy supplier if you have a peak load reduction agreement. Failure to take this precaution could result major damage to the unit or cause components to break (electrical components, compressors). In such circumstances, components are not covered by ETT guarantee. MARK-NOT_13.3-EN 11

12 F. Controller operation 1/ Main screen Key Name Description ALARM PRG - Press to access current alarms and faults. - Press and hold to acknowledge alarms. Nota: Correct the fault on the corresponding component (reset smoke detector, fi re thermostat or frost protection, thermal protection, etc.). - Press once to access setpoints. - Press twice to access operating schedule settings. - Press three times to access clock settings. ESC - Go back to previous screen. UP - Press to increase the selected value. - From main screen: change display. DOWN - Press to decrease the selected value. - From main screen: change display. ENTER - Press to confi rm setting. - Press and hold to start/stop the unit. UP DOWN - Press and hold together to access the Controller menu (password protected). 12 MARK-NOT_13.3-EN

13 2/ Access to level - User settings Access to: - Setpoints - Operating schedule - Clock setting Hold the UP and DOWN arrow keys simultaneously for 2 seconds. Password = Use the UP and DOWN arrow keys to scroll through menus. Press the ENTER key to enter the selected menu. Use the UP and DOWN arrow keys to scroll through screens. Press the ENTER key to access screen setpoints. Use the UP and DOWN arrow keys to select the setpoint to edit. Press the ENTER key to access the setpoint. Use the UP and DOWN arrow keys to adjust the setpoint. Press the ESC key to return to the main screen. MARK-NOT_13.3-EN 13

14 3/ Access to level 1 - Maintenance Access to: - Maintenance - Communication - Alarms history - Energy meter - Inputs / Outputs - Meter reset Hold the UP and DOWN arrow keys simultaneously for 2 seconds. Password = 1 Use the UP and DOWN arrow keys to scroll through menus. Press the ENTER key to enter the selected menu. Use the UP and DOWN arrow keys to scroll through screens. Press the ENTER key to access screen setpoints. Use the UP and DOWN arrow keys to select the setpoint to edit. Press the ENTER key to access the setpoint. Use the UP and DOWN arrow keys to adjust the setpoint. Press the ESC key to return to the main screen. 14 MARK-NOT_13.3-EN

15 G. Diagnostics and troubleshooting support 1/ Smoke fault Smoke detection Fouled detector head Backup battery out of service - Check for smoke or dust - Clean detector head - Replace detector head - Acknowledge the fault (See Main screen, p. 12) - Check for smoke or dust - Clean detector head - Replace detector head - Acknowledge the fault (See Main screen, p. 12) - Replace battery 2/ Filter fault Fouled fi lters Fouled exchangers - Clean fi lters - Replace fi lters - Clean exchangers according to the recommendations 3/ Air flow fault Fouled fi lters Leakage on air network Fouled air network - Clean fi lters - Replace fi lters - Repair air distribution network - Clean air distribution network 4/ Fire fault Lack of air fl ow rate Faulty thermostat - Check fi lters - Check fan and fan motor - Check thermostat 5/ Antifreeze fault Lack of air fl ow rate Faulty thermostat Faulty thermostat - Check fi lters - Check fan and fan motor - Check thermostat - Faulty thermostat MARK-NOT_13.3-EN 15

16 6/ Low pressure fault Poor air fl ow Fouled fi lters Low pressure switch malfunction Expansion valve malfunction Refrigerant charge problem Fouled evaporator Ineffi cient defrosting - See Air fl ow fault, p Clean fi lters - Replace fi lters - Check pressure switch operation - Check pressure switch connections - Check expansion valve (status, settings, operation). - Check tightness - Clean exchangers according to the recommendations - Check refrigeration circuit probes - Check 3-way valve in external box - Check defrost settings 7/ High pressure fault Wrong water fl ow rate High pressure switch malfunction Fouled fi lters Outside T out of application range Poor air distribution - See Air fl ow fault, p Check pressure switch operation - Check pressure switch connections - Clean fi lters - Replace fi lters - No action - Check air distribution network 8/ Refrigeration circuit fault 8.1/ The compressor does not start. Electrical protection faults Control security Abnormal supply voltage Ventilation fault - Check protections - Check control parameters - Check securities - Reset controller if authorised - Check phases - Check voltage drop at unit start-up - Check power supply chain (wire, connections, contactors, etc.) - Check external box and internal fan 16 MARK-NOT_13.3-EN

17 8.2/ The compressor stops. Low pressure fault High pressure fault Ipsotherm fault Thermal fault Power supply chain interruption Ventilation fault - See Low pressure fault, p See High pressure fault, p Check compressor cooling - Check ipsotherm probe - Check fi lters for fouling - Check compressor's absorbed current - Check voltage drop at start-up - Check power supply chain (wire, connections, contactors, etc.). - Check external box and internal fan 8.3/ The compressor is noisy. Knocks Slugging Grunts - Check compressor suction pressure - Check charge (subcooling) - Check superheat - Check expansion valve bulb fi xation - Check supply voltage - Check phases - Galling broken part 8.4/ The compressor does not stop. Stuck contactor - Check contactor 8.5/ Lack of capacity. Whistling expansion valve Severe overheating Pre-expansion Wrong fl ow rates - Check expansion valve settings - Check charge - Check expansion valve settings - Check charge - Check drier fi lter - Check fl ow rates in air streams MARK-NOT_13.3-EN 17

18 É nerg ie Transfert Thermique Design: ETT - Document printed by an environmentally friendly printer using vegetable based ink on PEFC paper created from sustainably-managed forest. Reference: MARK-NOT_13.3-EN 56 Route de Brest - BP PLOUDALMEZEAU - France Tel: 33 () Fax : 33 () Export Contact: 33 () ETT Services: 33 ()