Mitsubishi Electric ecodan PUHZ-W50VHA2 Скачать руководство пользователя страница 43 | Manualshive

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40

SYSTEM SET-UP

Change Language

The initial language setting is English. If you require to change this, follow the 4 steps below. The instructions in this guide use
English for the annotated displays, whatever language is selected the sequence combination of the buttons will not alter.

Step 1:

Hold down buttons D and E for 2 seconds.

This activates the controller.

Step 2:

Press button G to scroll through the

languages.

1

2

3

Normal Display

Change Language

D E

G

Language

English (GB)

Language

Spräk VAL

Language

Deutsch (D)

Language

French(F)

Language

Espanol(E)

Language

Pycck(RU)

Language

Italiano(I)

Step 3:

For each press of button G will move

through the 7 available languages. Leave on
desired language to proceed.

G

G

G

G

G

G

G

4

Normal Display

D E

Step 4:

Hold down buttons D and E for 2 seconds.

To return to original screen.

2

1

Normal Display

C

Mon

Tue

Sun

Wed

Thu

Fri

Sat

Time

Step 1:

Press either of the C buttons to

start

Step 2:

Press button D to advance

through each day. Once on
current day press C to set time.

Step 3:

Press either of the C buttons

as necessary to set the time.

3

Step 4:

Press button E when settings are

complete.

As you hold the C button down, the time (displayed at 1) will increment first in one minute intervals, then in ten minute
intervals, and then in one hour intervals. This works in either direction.

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is recovering from a power failure.

´127$9$,/$%/(µPHVVDJHLVGLVSOD\HGLIDEXWWRQLVSUHVVHGWRRSHUDWHDIXQFWLRQWKDWWKH)7&XQLWGRHVQRWKDYHRUD

function that is not available due to the setting.

At this stage the controller has only been used for basic settings, there are still further functions that require setting-up.

Setting day of the week and time

The day and time will run from the day the system is switched on. To change these settings please following instructions.

D

D

D

D

D

D

D

C

Throughout the system set-up buttons on the controller are referenced by letters and displays by numbers ; this key can be found on page 41

41

«
...
41
42
43
44
45
...
»

Содержание ecodan PUHZ-W50VHA2

Страница 1: ...ation Single phase power supply with a low starting current 3 phase available for 14kW Low maintenance and quiet operation Operates with outside temperatures as low as 25ºC Multiple unit connection Hybrid function for use with conventional boilers 2 zone energy efficient space heating control Available as a standalone packaged or semi packaged system Energy monitoring as standard Coastal protectio...

Страница 2: ...utlet water temp 35 C inlet water temp 30 C as tested to BS EN14511 4 Sound power level of the PUHZ W50VHA2 is 61dBA PUHZ W85VHA2 is 62 5dBA PUHZ W112VHA is 65dBA PUHZ HW140VHA2 is 65 5dBA PUHZ HW140YHA2 is 67 5dBA Tested to BS EN12102 5 Grille 6 MCB Sizes BS EN60898 2 BS EN60947 2 7 Flow Temperature Controller FTC for standalone systems PAC IF062B E Dimensions WxDxH mm 520x150x450 Printed on Sept...

Страница 3: ...r 2 model Number PAC IF03IB E FTC2 ecodan Air Source Heat pump model Number PUHZ W50VHA BS PUHZ W85VHA BS PUHZ W85VHA 2 BS PUHZ HW140VHA BS YHA BS PUHZ HW140VHA BS 2 YHA 2 BS UNITED KINGDOM Mitsubishi Electric Euro Living Environmental Systems Division Travellers Lane Hatfield Hertfordshire AL10 8XB En September 2011 FTC STANDALONE ...

Страница 4: ...2 ...

Страница 5: ...or unit x Connecting external input x Connecting thermistor cable x Switch setting of FTC2 x Automatic change over mode x DHW off condition x DHW heating procedure x Legionella prevention mode x Heating and Heating ECO mode x Defrost operation x Cooling mode x Anti freeze mode x Emergency mode x Test run x Recycling and unit disposal SYSTEM SET UP Page 41 System set up procedure x Change language ...

Страница 6: ...d ON x When setting the hot water temperatures on the PAR W21MAA remote controller please be aware that this is no longer flow temperature to the cylinder as is selected on FTC1 For FTC2 cylinder target temperature is selected so it is important to ensure that no more than 55o C is selected for hot water mode x TH5 cylinder sensor is now supplied with the package and should be immersed in a dry cy...

Страница 7: ...he design and installation Please note Mitsubishi Electric do not therefore accept any responsibility for matters of design selection or specification or for the effectiveness of an installation containing one of our products unless we have been specifically requested to do so All goods are sold subject to our Conditions of Sale Important Note Included in the AEI introduction pack is the Mitsubish...

Страница 8: ... pipework Flexible connection pipes supplied MUST be fitted between the outdoor unit and primary rigid pipework on both the flow and the return x The Fernox Boiler Buddy should be fitted internally on the return pipe from the Ecodan to help protect the heat pump from any heating system contamination and provide an ongoing visual indication of the system water condition Interconnection Between Ecod...

Страница 9: ...hen required Each of the Ecodan models require sufficient primary flow rate for adequate operation Due to the large resistances caused by the plate heat exchanger in the Ecodan two domestic circulating pumps in series to produce the required flow rates These pumps must be set to the same speed or damage to the system may occur Pipe diameters will need to increase on the PUHZ HW140VHA 2 YHA 2 model...

Страница 10: ...he outside air is absorbed by the refrigerant It is only the refrigerant that is being passed through this cycle the water is heated up by the plate heat exchanger The cooler water extracts energy from the hotter refrigerant i e the water is heated as it passes across the plate heat exchanger This water flows towards the heating system and hot water storage tank where its energy is used to provide...

Страница 11: ...uipment x The anti vibration flexible hoses should be fitted to the flow return pipe work x Condensate water may be produced which will drain away from the unit It is suggested that a gravel filled channel as a soak away or a similar arrangement to suit the location is installed to overcome this x An optional drainage kit may be purchased should condensate need to be disposed of in a main drain as...

Страница 12: ...current A 5 5 5 Fuse Rating MCB sizes BS EN 60947 2 A 16 25 40 16 Heating A2 W35 Capacity kW 5 0 8 5 14 Eco label COP 3 13 2 95 3 17 2 69 3 11 Eco label Power Input kW 1 6 2 88 2 68 5 21 4 52 Nominal Flow Rate L min 14 3 25 8 40 1 Heating A7 W35 Capacity kW 5 0 9 0 14 0 Eco label COP 4 1 3 85 4 18 4 19 4 25 Eco label Power Input kW 1 22 2 34 2 15 3 34 3 31 Nominal Flow Rate L min 14 3 25 8 40 1 Pr...

Страница 13: ...r to pages 29 40 The FTC2 unit should be supplied with the following parts 1 FTC2 unit x 1 2 Thermistor x 2 TH1 Red Cable TH5 Black Cable 3 Remote controller cable 5m x 1 4 Remote controller x 1 A B Fig 1 7 Fig 1 8 Fig 1 9 A FTC2 case screws B FTC2 case C FTC2 mounting holes 11 ...

Страница 14: ...11 INSTALLATION Pipe Work Schematic Single Zone Fig 2 0 12 ...

Страница 15: ...12 INSTALLATION Pipe Work Schematic Twin Zone Fig 2 1 13 ...

Страница 16: ...appliance must be in accordance with the latest I E E wiring regulations and any local regulations which may apply The appliance shall be supplied from a suitably rated double pole isolator with a contact separation of at least 3mm in both poles In the event of an electrical fault after installation of the appliance electrical checks must be carried out i e Earth Continuity Short Circuit Polarity ...

Страница 17: ...he float Anti Vibration Equipment Flexible hoses are supplied with the Ecodan package and should be installed to connect the Ecodan to the system pipework do not over tighten joints and always use the washers provided Anti vibration mountings i e Tico pad should be installed under the mountings of the heat pump to prevent excessive vibration Automatic Bypass Valve 2Q FRGDQ V VWHPV DQ DXWRPDWLF E S...

Страница 18: ...stic pipework it is designed and sized using the characteristics for plastic pipework Cylinder Specification As a rule of thumb for the average household application the following combinations can be used however please note these are for guidance only and must be checked by the designer and installer beforehand To achieve good system efficiencies higher flow rates are recommended Using a larger c...

Страница 19: ...bles between Interface unit Flow Temperature Controller and outdoor unit directly to the units no intermediate connections are allowed Intermediate connections may result in communication errors If water enters at the intermediate connection point it may cause insufficient insulation to ground or a poor electrical contact If an intermediate connection is necessary be sure to take measures to preve...

Страница 20: ...Interconnecting cable number of cores will vary dependant on which appliances are specified Fig 2 3 17 INSTALLATION WIRING DIAGRAMS Note 1 Optional relay box 1 is for use with 1 x 3kW immersion heater Note 2 Optional relay box 2 is for use with 1 x 3kW immersion heater or 1 x 3kW boost heater Note 3 Interconnecting cable number of cores will vary dependant on which appliances are specified Fig 2 3...

Страница 21: ...i in ns s S Su up pp pl ly y DHW CH1 CH2 Normally Closed DHW Valve Normally Closed CH Valve Normally Closed CH Valve PUMPS 2 CHANNEL TIME CLOCK STANDARD ROOM THERMOSTAT HIGH LIMIT 95 degC CYLINDER THERMOSTAT IMMERSION HEATER BOOSTER HEATER RELAY CONTROL BOX N No ot te es s J J r re ef f P Pi in n 1 1 P Pi in n 2 2 P Pi in n 3 3 P Pi in n 4 4 P Pi in n 5 5 2 Channel time clock J6 DHW CH1 L N E Time...

Страница 22: ...es a Horstmann electronic boost control module which has the ability to override the specified FTC2 immersion heater control method in the unlikely event of a failure The FTC2 can also be used with this setup to control inline boost heaters should this function be required Alternatively the immersion heater may be controlled separately If direct control is not required then DIP switch SW1 4 should...

Страница 23: ...es TH1 Flow Sensor A flow thermistor and cable is supplied with the FTC2 package The sensor should be fixed and insulated to common flow pipe from the Ecodan The purpose of the thermistor is to allow the Ecodan to modulate its output dependant upon the operation mode and the required load of the property It does this by achieving preset flow temperatures programmed through the PAR W21MAA remote co...

Страница 24: ... all functions see pages 41 50 It has a display which shows the target and actual flow temperatures as well as the operating mode If the system is ever in a fault condition a two digit code will flash on this controller and the operation light will flash repeatedly The controller should be wired as shown in Fig 2 4 and care should be taken not to run the control cable with mains voltage cables INS...

Страница 25: ...22 Location Requirements Minimum Requirements for location of Ecodan LJXUHV VWDWHG DUH LQ PP V ILJXUHV LQ EUDFNHWV DUH for PUHZ HW140 YHA 2 BS VHA 2 BS units INSTALLATION OUTDOOR UNIT Fig 3 0 23 ...

Страница 26: ...lectric and ask an Accredited Installer or authorized technician to install them If accessories are improperly installed it may cause water leakage electric shock or fire x Do not remodel the unit Consult an Accredited Installer for repairs If alterations or repairs are not performed correctly it may cause water leakage electric shock or fire x The user should never attempt to repair the unit or t...

Страница 27: ...water pipes lightning rods or telephone grounding lines If the unit is not properly grounded there may be a risk of electric shock x Make sure to use circuit breakers ground fault interrupted isolating switch B fuse and moulded case circuit breaker with the specified capacity If the circuit breaker capacity is larger than the specified capacity breakdown or fire may result BEFORE STARTING THE TEST...

Страница 28: ...n socket PAC SG61DS E Drain pan for 50 85 PAC SG64DP E Table 1 3 Table 1 4 INSTALLATION OUTDOOR UNIT at a higher position or installing a hood on the air intake This can reduce the airflow and the unit may not operate properly x Avoid locations where the unit is exposed to oil steam or sulphuric gas x Make sure to hold the handles to transport the unit Do not hold the base of the unit as there is ...

Страница 29: ...n Be aware and take care of velocities in small pipes bends and similar obstructions that can exceed the values above E g Copper 1 5m s WATER QUALITY CONDITION x The water in a system should be clean and with a pH value of 6 5 8 0 x The following are the maximum values Calcium 100mg L Chlorine 100mg L Iron Manganese 0 5mg L Note Make sure to perform the frozen prevention measure for water pipe sys...

Страница 30: ...han other cables WARNING In case of A control wiring there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn on the main power when servicing Outdoor unit model PUHZ W50VHA PUHZ W85VHA 2 BS PUHZ HW140VHA 2 BS PUHZ HW140YHA 2 BS Outdoor unit power supply N single 5...

Страница 31: ...or fire If the FTC2 needs to be repaired or moved ask an authorised technician BEFORE INSTALLATION CAUTION x Do not install the FTC2 unit in an outdoor location as it is designed for indoor installation only Otherwise electric shock or breakdown may be caused by water wind or dust x Do not use the unit in an unusual environment If the FTC2 unit is installed or exposed to steam or volatile oil incl...

Страница 32: ...asing are not waterproof x Avoid locations where the heat unit is exposed to direct sunlight or other sources of heat x Select a location where easy wiring access to the power source is available x Avoid locations where combustible gases may leak be produced flow or accumulate x Select a level location that can bear the weight and vibration of the unit x Avoid locations where the unit is exposed t...

Страница 33: ...nces surrounding the remote controller C Installation pitch Seal the entrance for the remote controller with putty to prevent possible liquids entering or insects A For installation in the switch box B For direct installation on the wall select one of the following Prepare a hole through the wall to pass the remote controller cable in order to take out the remote controller cable from the back the...

Страница 34: ...tects flow temperature water outlet side correctly Thermistor position TH2 sensor is not required for packaged type system as it is used to monitor refrigerant pipe temperature on split type systems CONNECTING THERMISTOR CABLE TH5 Connect the thermistor for the actual domestic hot water cylinder temperature to 5 and 6 on the terminal block TB61 on the FTC2 controller When the thermistor cables are...

Страница 35: ...or unit ǻTH selected using Dip SW2 1 The heat pump will turn off or revert to heating when Tank temperature TH5 domestic hot water set temperature consecutively for 1 minute Heat pump operation The heat pump will be controlled directly by the FTC2 while in domestic hot water mode The operational characteristics can be selected using Dip SW2 2 Option 1 COP priority mode In this mode Ecodan will hea...

Страница 36: ...hout immersion heater OFF For both DHW and heating ON with immersion heater OFF For both DHW and heating OFF without immersion heater ON For heating only ON with immersion heater ON for heating only Table 2 1 Table 2 2 Table 2 3 SW 1 3 Setting Notes OFF With DHW tank Necessary to connect TH5 ON Without DHW tank NOT necessary to connect TH5 SW 1 6 Setting Notes ON Packaged type NOT necessary to con...

Страница 37: ...ion changes according to the Dip SW setting 3 port valve is switched ON with the following switch setting Electrical heater phase TYPE A SW1 5 OFF Booster heater for both DHW and Heating Once the Booster heaters are ON 3 port valve remains ON for 1 minute after the Booster heaters are switched OFF 3 port valve is switched OFF with the following switch setting Electrical heater phase TYPE B SW1 4 O...

Страница 38: ... 4 and 2 5 Emergency electric heater only mode PHUJHQF PRGH LV DYDLODEOH LQ FDVH RI FRGDQ V IDLOXUH Q WKLV PRGH RQO HOHFWULF KHDWHU RSHUDWHV DV D KHDW VRXUFH FRGDQ comes first in any operation mode except in Emergency mode In the Emergency mode the heater is switched ON without RSHUDWLQJ WKH FRGDQ I WKHUH DUH QRW HOHFWULF KHDWHUV LQ WKH FLUFXLW PHUJHQF PRGHµ FDQ QRW RSHUDWH Emergency mode can be a...

Страница 39: ...put is not in use ON OFF OFF ON 1 5V ON ON 4 20mA INSTALLATION FTC2 Table 2 5 ON OFF ON OFF OFF OFF 36 Dip switch Function OFF ON Factory Setting SW1 SW1 1 System Select SW1 2 SW1 3 Domestic Hot Water tank With DHW tank Without DHW tank OFF SW1 4 Immersion heater Without Immersion heater With Immersion heater ON SW1 5 Booster heater position For both DHW and Heating For Heating only or without Boo...

Страница 40: ...eration Comp OFF ON ON OFF OFF Flow chart for Automatic change over mode When switching operation mode Domestic Hot Water always has the priority Heating mode is carried out at least 1 minute before switching for domestic hot water mode This is to allow users to change settings in heating mode Fig 4 1 38 ...

Страница 41: ...ror P2 Refrigerant liquid pipe TH2 sensor error P6 Freezing Overheating protection operation P9 Actual tank temperature TH5 sensor error Fb FTC2 unit control system error memory error etc EO E5 Signal transmission failure between remote controller and FTC2 E6 EF Signal transmission failure between outdoor unit and FTC2 No trouble generated in the past FFFF No corresponding unit U F Outdoor unit fa...

Страница 42: ...perly water leakage electric shock or fire may result x Do not stand on or place any items on the unit x Do not splash water over the unit and do not touch the unit with wet hands An electric shock may result x Do not spray combustible gas close to the unit Fire may result x Do not place a gas heater or any other open flame appliances where it will be exposed to the air discharged from the unit In...

Страница 43: ...Press button D to advance through each day Once on current day press C to set time Step 3 Press either of the C buttons as necessary to set the time 3 Step 4 Press button E when settings are complete As you hold the C button down the time displayed at 1 will increment first in one minute intervals then in ten minute intervals and then in one hour intervals This works in either direction 3 6 7µ PHV...

Страница 44: ...buttons have been locked 9 Timer indicators The indicator comes on if the correspond ing timer is set 10 Error indicator Comes on when error occurs 4 Temperature indicator Shows the current water temperature 11 Power On indicator Indicates that the power is on For purposes of this explanation all parts of the display are shown During the actual operation only the relevant items will be displayed T...

Страница 45: ...of button D will change the function You ZLOO QHHG WR EH RQ 6HOHFW HDWLQJ FR VFUHHQ D D D D D D H Step 6 URP WKH 6HOHFW HDWLQJ FR PRGH pressing button H will alternate between on and off Pressing D will go through the process on step 5 Finish Press button A Hold down buttons D and E for 2 seconds to return to original screen H H 1 2 3 4 5 6 When setting up the controller pressing button A must be ...

Страница 46: ...UHVVLQJ EXWWRQ H will alternate between on and off Pressing D will go through the process on step 5 Finish Press button A Hold down buttons D and E for 2 seconds to return to original screen Select Hot Water Select Anti Freeze Select Cooling Select Heating Select Eco Heating D D D D D On Off H H H 6 Hot water set up To set XS KRW ZDWHU XVHV D VLPLODU SURFHVV WR WKDW RI WKH HDWLQJ 2 PRGH 7KH ILUVW ...

Страница 47: ...on You will need to select locking function 2 to totally disable the PAR W21MAA 5 Finish Press button A Hold down but tons D and E for 2 seconds to return to original screen Off Locking Function 1 Locking Function 2 D D Locking Function To ensure that the Ecodan is only operated by signals from the two channel programmer it is necessary to undertake the following procedure and lock the controller ...

Страница 48: ...t by the commissioning engineer in accordance with the system design and the buildings thermal properties Heat Emitters Radiators Under floor heating Please note that heat pumps provide lower flow temperatures to radiators than a conventional gas boiler Rather than the radiators turning on off locally as with a gas boiler heat pumps provide a more consistent lower flow temperature which allows for...

Страница 49: ...e under floor heating this negates the need for mixing valves which are detrimental to the efficiency When specifying under floor heating there are some important factors to be aware of as rectifying mistakes will be costly if not impossible x Bad placement of thermostats where they are affected by external sources of heat or cold temperatures will lead to poor temperature control x Under floor he...

Страница 50: ...p 4 From any of the modes in step 3 pressing button A will memorise these VHWWLQJV 7KH VFUHHQ ZLOO IODVK VHWWLQJV for several settings Holding down button H will end the set up There are a selection of modes on the controller that the end user can choose for set up purposes please note that some of these may have been removed or disabled for use with the Ecodan unit From the normal display it will...

Страница 51: ...the Check Button is pressed If you have entered contact number to be called in the event of a problem the screen displays this number You can set this up under Function Selection of remote controller Alternating Display Fig 4 9 Waiting for start up Operational Mode Heating Heating ECO Hot water Anti freeze Stand by Hot adjust Defrost Not in use button Check Error Test run Self check Change languag...

Страница 52: ...he cylinder target temperature to the left Fig 5 1in hot water heating this should have been set to 55 C as detailed in the previous section As the flow from the heat pump raises in temperature the actual cylinder temperature will slowly increase until it meets the target Hot water heating will NOT cease until the cylinder sensor temperature is satisfied Once the cylinder thermostat is satisfied m...

Страница 53: ...west flow temperature possible to suit the properties thermal losses To do this the heating demand from the time clock should be left constantly operational and the flow temperatures should be reduced to a point where the property is maintained at the design temperature usually 21 C without being switched ON and OFF IURP WKH URRP WKHUPRVWDW RU 759 V day timer clocks with night time set back can al...

Страница 54: ... for pasteurisation This is carried out automatically with the immersion heater energised via a relay box which in turn is powered by FTC2 The frequency of the immersion heaters occurrence is determined by DIP switch settings SW2 4 and SW2 5 Please note the larger the temperature rise completed by the immersion heater and the more frequently it occurs the less efficient the system becomes COMMISSI...

Страница 55: ...te controller is not only for FTC change it An error code appears in the remote controller display x The protection devices have operated to protect the FTC and outdoor unit x Consult the error code section of the relevant service manual or call the technical support helpline on 0870 3000 300 for assistance Service Maintenance The Ecodan must be maintained on an annual basis A maintenance check sh...

Страница 56: ...tional temperatures Fernox HP 5c is compatible with all materials commonly used in heat pumps and under floor heating systems Physical Properties Composition An aqueous solution of monopropylene glycol with specifically formulated inhibitors stabilisers and biocides Odour Characteristic Form Liquid Appearance Clear blue liquid Density 1 03 1 05 pH 6 7 Application and Dosage LOXWH EHIRUH XVH ZLWK P...

Страница 57: ... are cleansed and flushed new systems and those up to 6 months old with Sentinel X300 existing systems with Sentinel X300 existing systems with Sentinel X400 or Sentinel X800 Jetflo To ensure the system is sanitised before the introduction of Sentinel R600 it is advisable to add 1 litre of Sentinel R700 Santiser and Biocide during the initial fill of the system with water to prevent the developmen...

Страница 58: ... the appropriate adapter Boiler Buddy can be installed vertically or horizontally The unit is designed to slot into the space provided after removing a circulator pump when fitting a condensing boiler into an existing system ideally it should be fitted on the return close to the boiler itself The off set inlet and outlet ports enable Boiler Buddy to be fitted flush against a wall in existing pipew...

Страница 59: ...stallation x The Boiler Buddy has no moving parts and needs no adjustment once in service x The body casing is transparent so that build up of contamination can be observed x It is normal for the magnet nearest the inlet of the Boiler Buddy to become full first Once this is full the next magnet will clog up followed by the next and so on The Boiler Buddy has six magnets we recommend cleaning the c...

Страница 60: ...d position 14 Pass the replacement tamper proof tag through the slot in the latch ensuring that it also passes through the bridge on the latch This will guard against accidental opening of the clamp 15 Using two new fibre washers place the Boiler Buddy back into the pipework between the two pump servicing valves 16 Tighten the union nuts until finger tight after which use a spanner to tighten 1 8t...

Страница 61: ...ations x Check air charge is in expansion vessels x Pressurise primary circuit to approximately 1 5 bar x Open all isolating valves x Release ALL air from the system using the bleed valves on the cylinder and vent at the highest point of the system Before bleeding the air from the system the zone valves should be manually opened to prevent air lock and possible damage of the circulating pumps COMM...

Страница 62: ...NITS ELECTRIC CABLE GOOD POOR TYPE SIZE 11 CONNECTION OF CONTROL WIRING OUTDOOR GOOD POOR INDOOR GOOD POOR CABLE TYPE 1 5mm 3 CORE YES 12 CONNECTION OF OPTIONS GOOD POOR 13 ANTI FREEZES ADDED TO SYSTEM 25 CONCENTRATION YES 14 CHECK AIR CHARGE IS IN EXPANSION VESSELS YES 15 PRESSURISE PRIMARY CIRCUIT TO APPROXIMATELY 1 50 BAR YES 16 RELEASE AIR FROM SYSTEM YES OUTDOOR UNIT OPERATION STATUS 17 OUTDO...

Страница 63: ...ale the heat exchangers immersion heaters in hard water areas Major Visit 7 Check and clean the Boiler Buddy Major Visit 8 Open the primary heating system safety valve and check that it discharges safely Major Visit 9 Drop the primary heating system pressure to zero check and if necessary top up the air side of the expansion vessel Major Visit 10 Check and if necessary top up the concentration of ...

Страница 64: ...ck that the whole system is working satisfactorily Frequency of Visits Major Visit Once per year Mitsubishi Electric recommends that the frequency of maintenance visits to be a maximum of 12 months between inspections Frequency of maintenance may increase dependent upon the equipment environment and local water conditions e g hard water scale forming water containing a high proportion of solids Fa...

Страница 65: ...emarks of Mitsubishi Electric Europe B V The company reserves the right to make any variation in technical specification to the equipment described or to withdraw or replace products without prior notification or public announcement Mitsubishi Electric is constantly developing and improving its products All descriptions illustrations drawings and specifications in this publication present only gen...

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