Stulz WSA Explorer Original Instructions Manual

Water cooled liquid chillers

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WSA Explorer

Original instructions

Water cooled liquid chillers

400V / ~3 / 50Hz

Index i09

Issue 01.2019

Table of Contents

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Page 1 WSA Explorer Original instructions Water cooled liquid chillers Index i09 400V / ~3 / 50Hz Issue 01.2019...
Page 2 W SA E x p lO r E r O r i g i n A l i n S t r u c t i O n S A B O U T S T U L Z Since it was founded in 1947, the STULZ company has evolved into one of the world’s leading system suppliers of air-conditioning technology.
Page 3 It is the result of many years of research and design studies, as well as a fine matching of materials and technologies to obtain a high quality chiller. The CE mark guarantees that the STULZ products fulfil the requirements of the European Machinery Directive for safety.
Page 4: Table Of Contents
4.5 Hydraulic diagrams ......................32 4.5.1 Legend ................................. 32 technical Data ................... 36 5.1 Application limits ........................ 36 5.1.1 Storage conditions ..........................36 5.1.2 Operating conditions ..........................36 5.2 Chilled water quality ......................38 EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 5 8.3.5 Exchange of filter drier ..........................77 8.3.6 HP switch ..............................77 8.3.7 LP switch ..............................77 8.3.8 Safety valve ..............................77 8.3.9 Expansion valve ............................78 8.3.10 Compressor ............................. 78 8.4 Air circuit ..........................80 © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 6 11.3.1 Safety ................................. 90 11.3.2 Material ..............................90 11.3.3 Installation ..............................91 11.3.4 Maintenance ............................92 11.4 Refrigerant R513A ......................93 11.5 Power factor correction capacitor ................94 11.6 Energy meter ........................... EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 8: Introduction
To claim any warranty purpose the following conditions need to be satisfied: The initial startup of the chiller has to be carried out by trained personnel authorized from STULZ. Only STULZ approved spare parts and liquids are allowed to be used.
Page 9: Safety
With equipped antifreeze option, even in the proximity of the heaters around the evaporator and the steel hydraulic piping. lifting point. Location: near the lifting points on the base frame of the unit. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 10 Dispositif contenant fluides HFC à effet de serre disciplinés par le protocole de Kyoto (517/2014) MADE IN ITALY According to According to Kyoto Protocol Kyoto Protocol Empty Space Empty for additional refrigerant charge added on the installation site EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 11: Safety Instructions
This cooling unit contains fluorinated greenhouse gas covered by the Kyoto protocol In these STULZ chillers the refrigerant R134a is used, or R513A as an option. Refrigerants are vol- atile or highly volatile fluorinated hydrocarbons which are liquefied under pressure. They are incom- bustible and not hazardous to health when used as intended.
Page 12: Safety And Environmental Requirement
Then rinse with water. independent conversion and manufacture of replacement parts The system may only be converted or modified after consultation with STULZ. Original replacement parts and replacement parts/accessories authorised by STULZ are an aid to safety. unacceptable operating methods The operating safety of the system is only guaranteed when it is used as intended.
Page 13: Residual Risk
Correctly design supply cables and pro- protection devices tection elements. Wear protective mask Top of the unit Fans without AxiTop diffusor. Shearing, cuts. If AxiTop diffusor option is not installed, install protective devices of the fans. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 14: Maintenance
Identification of preparation Opteon™ XP10 (R-513A) Recommended uses Refrigerant 2. Composition/Information on ingredients Tetrafluoroethane (CH CAS No. 811-97-2 CE No.: 212-377-0 Concentration: 44% 2,3,3,3-Tetrafluoroprop-1-ene (C CAS No. 754-12-1 CE No.: 468-710-7 Concentration: 56% EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 15 1 without expert advice. Health studies have shown that chemical exposure may cause potential human health risks which may vary from person to person. WArning please, refer to the specific “Safety Data Sheet” of lubricant oil © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 16: Transport/ Storage
• You receive the consignment papers with the delivery of the chiller • The shipment is made ex works, in case of shipment damages, please assert your claim directly towards the carrier. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 17: Storage
F-Gas regulations and EN 378. 3.3 transport The STULZ chillers can be lifted and moved by lifting devices with ropes or belts. There are lifting plates attached to the base frame for this purpose. The lifting plates are standard wise supplied and installed on the chiller.
Page 21: Centre Of Gravity
1210 mm 1210 mm 1483 mm 1483 mm 1483 mm 3100 mm 3120 mm 3120 mm 3271 mm 3292 mm 3292 mm 940 mm 940 mm 940 mm 1137 mm 1137 mm 1137 mm © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 23: Description
3 n°1 pump with inverter 4 n°2 pumps with inverter Heat recovery 12°digit 0 none D partial recovery (t.b.d.) t total recovery (t.b.d.) Options 13°digit (change accordingly to the selected options) 14°digit 15°digit © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 24: Intended Use
Any use beyond this is not intended. STULZ is not liable for any damage resulting from such misuse. The operator alone bears the risk. The chiller must not be used for the warming of water.
Page 25: Compressor
For the free cooling model the MicroChannel is treated with a cataphoresis treatment which is avail- able for the base version as option. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 26: Electrical Cabinet
It is able to show the information about the operation conditions, the status of the unit and all the alarms. It is accessible from the outside. All features are password protected. inFOrMAtiOn To get more information about the SEC.blue please refer to the separate controller manual EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 27: Piping Diagrams
Electronic expansion valve Evaporator Water outlet Refrigerant filter Manual valve Temperature trasmitter Liquid receiver Pressure limiter, low Disconnectable joint PZHH High pressure switch Insulation Low pressure switch Refrigerant line General valve Actuating line © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 32: Hydraulic Diagrams
Pressure Transducer Manual valve Evaporator Heaters Pump Check valve Temperature trasmitter Disconnectable joint Low pressure switch Insulation General valve Water line inFOrMAtiOn See the diagrams in “4.4 Piping diagrams” at page 27 EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 33 MT10 MT14 WATER IN WATER OUT SHELL & TUBES EVAPORATOR WSA 250-280-300 MT24 PDZAL MT20 MT12 MT16 MT23 MT19 MT11 MT15 MT22 MT18 MT10 MT14 WATER IN WATER OUT SHELL & TUBES EVAPORATOR © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 34 PDZAL MT16 MT32 MT11 MT23 MT19 MT27 MT15 MT31 MT22 MT10 MT18 MT26 MT14 MT18 MT24 MT22 MT20 WATER IN MT32 MT30 MT30 BC10 WATER OUT BC12 BC11 SHELL & TUBES EVAPORATOR EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 35 3° 4° 5° 6° 7° 8° 9° 10° 11° 12° 13° 14° 15° PDZAL PDZAL WATER IN WATER IN WATER IN WATER OUT WATER OUT SHELL & TUBES SHELL & TUBES EVAPORATOR EVAPORATOR © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 36: Technical Data
W SA E x p lO r E r O r i g i n A l i n S t r u c t i O n S 5. technical Data 5.1 Application limits The STULZ Explorer WSA units are provided for operations within the following ranges: type of network TT; TN-S ; TN-C-S...
Page 37 WSA640 low noise version @50 Hz WSA160 WSA220 WSA250 WSA280 WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 Free cooling version @50 Hz WSA160 WSA220 WSA250 WSA280 WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 38: Chilled Water Quality
The following limits for the water circuit may not be exceeded DAngEr For outlet water temperatures lower or equal to +5°C and environments with temperatures low- er than 0°C, use non freezing mixture approved by STULZ Minimum Maximum Feature...
Page 39: Pressure Drops
30,0 40,0 20,0 25,0 50,0 75,0 100,0 125,0 150,0 175,0 200,0 225,0 250,0 275,0 300,0 325,0 30,0 Water Flow [m³/h] 20,0 © STULZ S.p.A. – all rights reserved EN/01.2019/i09 25,0 50,0 75,0 100,0 125,0 150,0 175,0 200,0 225,0 250,0 275,0 300,0...
Page 40: Head Pressure Available
WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 Water Flow [m³/h] Ht Versions - 1 or 2 pump(s) WSA250 WSA280 WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 Water Flow [m³/h] Water Flow [m³/h] EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 41 FrEE cOOling Versions - 1 or 2 pump(s) WSA250-280 WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 Water Flow [m³/h] FrEE cOOling Ht Versions - 1 or 2 pump(s) WSA250-280 WSA300 WSA320 WSA360 WSA380 WSA440 WSA480 WSA640 Water Flow [m³/h] © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 42: Technical Data
(without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 43 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 44 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 45 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 46 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 47 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 48 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 49 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 50 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 51 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 52 (without options). Pump contribution is not considered. * In case of applications with output fluid temperature below 0°C, please contact the manufacturer EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 53: Dimensional Drawings
Free Cooling without pumps WSA 160 2473 2278 4255 1232 6” 5748 6118 5768 6138 Victaulic ® WSA 220 2473 2278 4635 1422 6” 5973 6013 6354 6394 Victaulic ® for each pump For standard version © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 54 2473 2278 6960 1321 3937 6” +186 +186 +205 +205 Victaulic ® WSA 300 2473 2278 6960 1321 3937 6” +237 +237 +260 +260 Victaulic ® for each pump For standard version EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 55 WSA 380 2473 2278 1825 5141 8” +247 +247 +270 +270 8879 Victaulic ® WSA 440 2473 2278 8879 1825 5141 8” +247 +247 +270 +270 Victaulic ® for each pump For standard version © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 56 8” +300 +300 +330 +330 Victaulic ® WSA 640 2473 2278 11983 1698 t.b.d. t.b.d. t.b.d. 8” +300 n.a. +330 n.a. Victaulic ® for each pump For standard version EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 57: Electrical Connection Data
Mini fit WSA 280 Mini fit WSA 300 Mini fit WSA 320 Mini fit WSA 360 Mini fit WSA 380 Mini fit WSA 440 Mini fit WSA 480 Mini fit WSA 640 Mini fit © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 58: Installation
• To avoid possible noise and vibration transmission the use of anti vibration mounts (option) is recommended. After installing the chiller check its horizontal alignment using a spirit level. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 59: Minimum Distance From Obstacles Or Other Chillers
The free space, indicated by red areas, is required to allow correct access to the unit for mainte- nance and replacement of components. inFOrMAtiOn The minimum distance must be guaranteed from any kind of obstacles: pipes, walls, other unit, etc. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 60: Weight On The Supports
W SA E x p lO r E r O r i g i n A l i n S t r u c t i O n S 6.2 Weight on the supports WSA 160 Without pump, without tank WSA 220 Without pump, without tank EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 61 W SA E x p lO r E r O r i g i n A l i n S t r u c t i O n S WSA 250, WSA 280, WSA 300 Without pump, without tank WSA 320, WSA 360 Without pump, without tank © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 62 W SA E x p lO r E r O r i g i n A l i n S t r u c t i O n S WSA 380, WSA 440 Without pump, without tank WSA 480, WSA 640 Without pump, without tank EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 63: Refrigerant Circuit
Do not add any other fluids or additives to the filling liquid except those provided. Do not mix any products and/or additives of different brands For additional freeze protection at low ambient temperatures consider using the optional electrical heaters. The following additional components are necessary for the external hydraulic circuit: © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 64 The water should be free from solid particles. For this purpose we rec- ommend the installation of a fine mesh strainer upstream the evaporator. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 65: Water Connection
• connect the pipe with adequate supports, so that it weight is not borne by the chiller • install adequate anti-vibration pipe joints to avoid the transmission of structure-borne noise © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 66: Filling And Bleeding Air
Check if the circulation pumps are supplied with power and if they are properly connected to the controller. Furthermore, make sure that the valves of all pumps are set OPEN. internal exchanger External exchanger EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 67: Electrical Connection
"0" you can open the doors of the power section. The doors of the electric cabinet can be opened by the key which is delivered with the chiller. Double bit 3-5 key © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 68: Position Of The Electrical Connections
I. If the phase rotation is incorrect, the controller display shows an alarm symbol and the unit does not start. After fixing the phase rotation, make sure that the unit is turned OFF. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 69: Backup Battery For E.e.v
Design the wiring between the controller and the contactor with reference to the connection dia- gram for the controller and the wiring between the pump and power switch according to the manu- facturer’s notes. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 70: Commissioning
• Check whether all power switches and control-circuit fuses in the electrical section of the unit are switched OFF. • Re-tighten all screw connections in the electric cabinet. • Verify the smooth function of the contactors. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 71: Oil Pre-Heating
(use the contactor in the electrical cabinet) and checking if the chiller is turned off • keep the pump running for 8 hours and clean the implemented filter (recommended part of the external circuit) after this lapse of time © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 72: Commissioning Of The Refrigerant Circuit
If the tolerances (18 K at the condenser, 7 K at the evaporator) are exceeded, there is a problem of heat transmission. The probable cause is the pollution of the heat exchange surfaces. Also the super-heating may be set too high. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 73 Value description time Minimum runtime of compressor: 300s Minimum pause time of compressor: 300s Run time Pause Minimum cicle time of compressor: 600s Cycle time Maximum start / hour 4 start/h © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 74: Maintenance
Be sure that the unit is being isolated. • The electronics housing of the fan motor can get hot. • The fans have an overrun time after the unit is stopped. (Risk of injury) EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 75: Maintenance Intervals
If a leak is detected: • evacuate all the refrigerant gas and dispose it according to the national regulation • repair the leak © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 76: Quantity
Take an oil sample, determine the humidity content and exchange the oil in case of excessive humid- ity content. In this case the refrigerant must be completely evacuated and recharged by new refrigerant accord- ing to the above described evacuation instruction. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 77: Exchange Of Filter Drier
5 years from the construction of the component. See the data stamped on the valve. The new safety valve must have the same features and it must be provided with PED certification. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 78: Expansion Valve
Pressure relief valve only if damage is suspected 100.000 h Check valve 5.000 h * 20.000 ... 40.000 h Roller bearing 10.000 h 50.000 h * at least yearly checked EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 79 The oil level should be in the lower quarter of the oil sight glass 7. Close the oil service valve, open the shut-off valves of the compressor and recharge the collected refrigerant into the refrigerant circuit. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 80: Air Circuit
The filters (optional) are made of metal, therefore they can be washed with water, once removed from their seats. 8.5 Evaporator circuit • Be sure that the cooling medium respect the limits and specifications required (see “5.2 Chilled EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 81: Tightness
Check the intervention by simulating a lack of flow in the hydraulic circuit. 8.6 Electric circuit To be checked: power board, electric components, motor • Check for any faults in the current consumption of the engines. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 82: Powerboard
• Check also the insulation of the water piping. Condensing air humidity on cold water pipes means a loss of cooling capacity. • Check for loose parts that cause an increase in noise and vibration. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 83: Malfunction
Through the fluid level sight glass of the circuit X check for Clogged filter-drier of the circuit moisture or bubbles in the refrigerant. Contact the Stulz ser- vice centre Excessive refrigerant gas charge resulting from a circuit Contact the Stulz service centre...
Page 84 Through the fluid level sight glass of the circuit check for Clogged filter-drier of the circuit moisture or bubbles in the refrigerant. Contact the Stulz ser- vice centre Partially closed tap on the fluid line of circuit Completely open the tap Low press.
Page 85: Dismantling And Disposal
It is advisable to contact a specialized recycling company. Basically, the unit contains the following raw materials: aluminium (exchangers and condensers); copper (exchang- ers, refrigerant pipes and electric cables), galvanized steel and iron (evaporator and condensers, panels and metal frames); rubber (water pipes). © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 86: Options
The orange wires in the electrical cabinet are under tension also with main switch in O position. • clean all the ventilation slots • in case of malfunctions, please contact the STULZ staff. inFOrMAtiOn If a operation is required on the electronic controller main-board, is necessary to open the spe- cific switch to cut out the electricity.
Page 87: Automatic Transfer Switch (Double Power Line)
4. close the doors of the electrical cabinet 5. press the button to activate the automatic management of power supply 6. use the control panel of the chiller to start the cooling © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 88: Turn Off The Unit
2. remove the handle in the switch panel and check that is on position “O” 3. move the selector on the OTM in position “Auto” (or 4. Close the electrical cabinet 5. Turn on the unit as described in paragraph “7. Commissioning”. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 89 14. Change-over switch (Switch II) to the position O 15. Change-over switch (Switch I) to the position I 16. Generator stop delay 17. Generator stop inFOrMAtiOn Other settings are available. Please contact STULZ S.p.A. to verify and perform the new setting. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 90: Axitop Diffusor
• Secure the unit to avoid the risk of overturning 11.3.2 Material The material necessary for each AxiTop is: Description position Clip Internal diffusor to support ring Oval head screw with flange M6x20 / T30 Cover to internal diffusor EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 91: Installation
Place the connection lines into the recesses on the external diffusor. Insert and tighten the 8 screw M6x12. Tightening torque: 9Nm © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 92: Maintenance
4. Fitting the cover fot the internal diffusor. Position the cover and fasten it with the four oval head screws with flange M6x20. tightening torque: 1,8Nm 11.3.4 Maintenance The AxiTop do not require maintenance. After 1 month for the installation, check the tightening of the screws. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 93: Refrigerant R513A
• O.D.P.: 0 • G.W.P: 573 • Composition: R-1234yf + R-134a (56% / 44%) • ASHRAE safety class: A1 inFOrMAtiOn The technical data don’t change with refrigerant R-513A. Only the refrigerant charge is different. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 94: Power Factor Correction Capacitor
No alarm activated ( alarm relay is not activated ) Settings locked by hardware switch at the back of the controller Settings unlocked by hardware switch at the back of the controller Demand to switch on step(s) EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 95 This function offers a possibility for the user to display three most concerned measurements in one screen. For instance, three line voltages can be shown in one screen in a better resolution and better view. © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 96 Ethernet, Modbus. More information regarding the Modbus, USB and TCP/IP protocol and programming. N.B. Hardware and software lock! Keep the factory settings! EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 97: Energy Meter
Cancel and go back to previous screen Press and hold OK + ESC to enter configuration mode Measurement / Parameter Value / Setting Icon indicating date / time are not set Date and time Units Configuration mode icon © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 98 First setting of the clock See below how to set the clock at the first commissioning or after a power supply shut off. To set the clock during normal operation, see the section of device configuration. EN/01.2019/i09 © STULZ S.p.A. – all rights reserved...
Page 99 Metering continues. Abnormal internal clock Restart the energy meter by powering off and powering on again function. then reset the date and time Not all codes apply to all models © STULZ S.p.A. – all rights reserved EN/01.2019/i09...
Page 100 STULZ Top Service – more than fast emergency assistance Advice Maintenance Implementation Test Center Technical Climate Customized Service-Portal For general questions about our products and services, you can reach us on weekdays from 8 – 18 at phone 0039 045 6331615.

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