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To ensure that galvanized steel surfaces are passivated, for the first 6-8 weeks of operation, the pH of the tank

water should be maintained between 7.0 and 8.2 and calcium hardness maintained between 100 and 300 mg/l (as

CaCO

3

). The passivation is complete and effective when the new zinc surfaces turn dull grey in colour. If white

deposits form on galvanized steel surfaces after the pH is returned to normal, this is a sign of white rust, and

therefore, the passivation process should be repeated to insure proper passivation and maximum corrosion

resistance.
In case that your water quality does not allow the pH to remain below 8.2, then you should consult a water

treatment specialist for advice on pH reduction or special passivation agents to promote proper passivation.

Special water treatment considerations

ICE TANK WATER

Since ice tanks can be on and off during the course of the year, it is possible for microbiological growth to

develop. Therefore, the best practice hygiene recommendation is for a dosage of non-oxidizing biocide

once/year. If the unit is an external melt, the biocide should be added after the unit is brought down for cleaning

and during the refill process, to insure proper mixing.

Following passivation, if the tank water is corrosive in nature (low hardness, low pH or alkalinity), the addition

of a corrosion 'non-precipitating' corrosion inhibitor is recommended. Examples of 'non-precipitating' corrosion

inhibitors are nitrites, molybdates and silicate based blends. Care must be taken not to use corrosion inhibitors

that raise the conductivity > 700 µS/cm, or alter the freezing point of the water. Therefore, such decisions need

to be taken with the advice of a water treatment specialist. For example, if the ice water needs food grade

approval because it could contaminant food products, then the silica based treatment programme is normally

used, if it meets food grade regulations.

GLYCOL SIDE OF THE ICE COIL

Only use "inhibited" glycol that contains pH buffers. Never use industrial grade ethylene glycol. The reason for

this recommendation is that over time, glycol degrades and produces "glycolic acid" as a result. These acids

reduce the pH of the circulating water, and this will cause corrosion of steel materials of construction.

As an added protection, the glycol loop should be treated with a nitrite, molybdate or silicate-based corrosion

inhibitor to promote metal passivation, and provide additional alkalinity to raise the pH above 9.0. Always

consult a water treatment specialist for recommendations on which corrosion inhibitor is most effective for your

specific water quality

W W W . B A L T I M O R E A I R C O I L . E U

22

Summary of Contents for ICE CHILLER TSU-M

Page 1: ...TSU M ICE CHILLER Thermal Storage Unit for internal melt OPERATING AND MAINTENANCE INSTRUCTIONS MTSU Mv06EN...

Page 2: ...the unit s certified drawing available for reference during inspection and maintenance If you do not have a copy of this drawing or need further information about the unit contact your local BAC Servi...

Page 3: ...Quantity Controller 10 4 Water Care 21 About water care 21 Passivation 21 Special water treatment considerations 22 5 Cold Weather Operations 23 About cold weather operation 23 Protection of operatin...

Page 4: ...l 2 Coil support beams 3 Glycol connections 4 Galvanised steel coil 5 Watertight covers 6 Primary liner 7 Extruded polystyrene insulation 8 Secondary liner Vapor barrier 9 Sight tube Not shown Ice Inv...

Page 5: ...ture of fluid 20 C The coils are manufactured from black steel and hot dip galvanised after fabrication and may contain certain contaminants such as carbon iron oxide or welding particles The installe...

Page 6: ...ll items such as bottom screens ladders safety cages stairways access platforms handrails and toe boards for the safety and convenience of the authorized service and maintenance personnel At no time t...

Page 7: ...rcumstance can one use parts of the unit that are not designed as an access mean unless measures can be taken to mitigate any risks that might occur from doing so Modifications by others Whenever modi...

Page 8: ...n the tank and consists of two major components Transmitter box for power supply and passive analogue 4 20 mA output signal A guided wave radar sensor installed in a PVC tube In case the sensor is exp...

Page 9: ...en charged with a glycol solution of the type and concentration specified 2 Confirm all circulating pumps are rotating in the proper direction 3 Confirm there is sufficient load to discharge the tanks...

Page 10: ...ution through the coils If complete melt out cannot be accomplished try to melt out as much ice as possible CAUTION Unmelted ice is wasted energy Seasonal Shutdown Ice Chiller Thermal Storage Units in...

Page 11: ...trol box will provide a passive 4 20 mA output signal where 0 mA stands for 0 ice and 20mA corresponds with 100 ice full ice build W W W B A L T I M O R E A I R C O I L E U 11 3 Operating instructions...

Page 12: ...C 12 13 normally open NO 14 15 16 Low level alarm contacts 380VAC 10A 24VDC 10A Mac cable section is 2 5mm2 14 16 normally closed NC 15 16 normally open NO Wiring specification OUTPUT SIGNAL GRAPHICS...

Page 13: ...the button allow to change values dial or navigate through the menu The active line has a mark in front of it Press the black button to continue Following screen appears For standard TSU M models the...

Page 14: ...ter the screen below Rotate the black button to select Set Zero Level and press to activate Make sure you only do this when no ice is present in the ice tank and when the water level is at the zero le...

Page 15: ...7 the zero level is not stored In case the sensor is not in the correct position sensor too high or too low to allow a correct full range measurement the display will indicate an error first and the p...

Page 16: ...set at 3 5mA to indicate a low level alarm If the water level rises above the maximum level the High Level Alarm is activated and Alarm is displayed on the screen The output contact 11 12 13 for high...

Page 17: ...s are available in the upper or lower area of the screen To select or activate a line press the black button If you want to navigate through the menu or change values or settings rotate the black butt...

Page 18: ...onfirm the zero setting The display shows Zero Level succesfully changed to confirm the setting If the black button is pressed without dialing 7 the zero level is not stored In case sensor position is...

Page 19: ...of settings During initial start up the access code is not asked for Rotate the black button to select 2 press to confirm Press 2 more times to confrim next 2 digits Dial then to select 0 and press to...

Page 20: ...the standard user If you enter the menu you get the following screen Keep pressing the black button to exit You can only enter with the correct code Software Version Press black button to see which s...

Page 21: ...o 9 0 Hardness as CaCO3 90 to 500 mg l Alkalinity as CaCO3 500 mg l max Total dissolved solids 1000 mg l max Chlorides 125 mg l max Sulfates 125 mg l max Conductivity 100 700 S cm Water quality guidel...

Page 22: ...tion if the tank water is corrosive in nature low hardness low pH or alkalinity the addition of a corrosion non precipitating corrosion inhibitor is recommended Examples of non precipitating corrosion...

Page 23: ...ssembly the sight tube assembly and if so equipped the Ice Inventory Sensor must be protected The sight tube and optional inventory sensor must be heat traced and insulated It is not necessary to drai...

Page 24: ...severe or sustained subfreezing ambient temperatures should be checked before initiating an ice build cycle Ice created by subfreezing ambient temperatures which accumulates at the top of the tank and...

Page 25: ...have any specific questions please contact your local BAC Balticare service provider or representative whose name e mail and phone number can be found on the website www BACservice eu The model type...

Page 26: ...approximate volume of water required Model Tank volume liters of water Coil volume liters of glycol solution TSU 237M 11320 985 TSU 476M 22110 1875 TSU 594M 28250 2320 TSU 761M 34640 2990 TSU L184M 88...

Page 27: ...rrosion protection MUST be repaired as soon as possible to prevent the damage from getting bigger If there is evidence of scale formation more than 0 1 mm or corrosion water treatment regime must be c...

Page 28: ...0 Ice in the sight tube During normal operation a solid layer of ice at the top of the tank will not form However should such a layer be formed due to unforeseen and unwanted operational circumstance...

Page 29: ...e your glycol supplier check samples of the glycol solution for the proper level of inhibitors and adjust if necessary W W W B A L T I M O R E A I R C O I L E U 29 6 Maintenance Procedure 6 Maintenanc...

Page 30: ...stallation and or start up for approximately one month shelf life or longer or stored in severe climates it is imperative that certain actions be performed by the installing contractor in order to mai...

Page 31: ...comaf 2002 30p Guide des Bonnes Pratiques Legionella et Tours A ror frig rantes Minist res de l Emploi et de la Solidarit Minist re de l Economie des Finances et de l Industrie Minist re de l Environn...

Page 32: ...W W W B A L T I M O R E A I R C O I L E U 32...

Page 33: ...W W W B A L T I M O R E A I R C O I L E U...

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Page 36: ...W W W B A L T I M O R E A I R C O I L E U...

Page 37: ...W W W B A L T I M O R E A I R C O I L E U...

Page 38: ...AGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS EQUIPMENTS SERVICES www BaltimoreAircoil eu info BaltimoreAircoil eu Please refer to our website for local contact details Industriepark Zone A B 2220...

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