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CAHA Midi

Installation, Usage and Maintenance Instructions

INSTRUCTIONS FOR THE USER

If you have questions concerning the use of your boiler or heating system, please ask your installer. It is in your own inter-

est and that of the installer that you are aware of how to operate your boiler and heating system safely and efficiently.

The appliance is not to be used by children or persons with reduced physical, sensory or mental capabilities, 

or lack of experience and knowledge. Children, even if being supervised, must not play with the appliance.

In the case of failure or malfunction of the appliance, do not attempt to repair it yourself. Please contact your 

installer. Repairs must only be carried out by qualified technicians. Failure to comply with these requirements can com

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promise the safety of the appliance.

OPERATION

Water, coming from the radiators or from the DHW unit is heated in the aluminium heat exchanger. The CH or DHW pump 

guarantees circulation of water. The air needed for combustion is sucked in by a rpm controlled fan. At low boiler tempera-

tures the flue gases can be cooled down sufficiently for condensation of the water.  This water is drained to the sewer via a 

built in syphon. This drainage must never be blocked. A burner controller with built in micro processor provides the electri-

cal control of the boiler.

TOPPING UP

The built in manometer indicates if the waterpressure is sufficient. As soon as the water pressure drops below 1 bar top

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ping up is necessary. If topping up becomes a regular occurrance, your installation should be checked by an installer.

Disconnect from the main. Connect the filling hose to the cold water tap and to the fill and drain valve of the boiler. Before 

tightning the coupling in the installation slowly fill the hose with water allowing present air to escape. Now open the fill and 

drain valve and slowly fill the installation until a pressure between 1.5 and 2.0 bar is reached. When finished connect again 

to the main.

BLEEDING

To remove any air present in the heating system and boiler, bleeding is necessary. Disconnect from the main. Open all the 

radiator valves. Bleed the air from all the radiators starting with the ones at the lowest point in the system. After bleeding, 

check the water pressure and top-up if required (if water pressure has dropped below 1 bar). Connect to the main again.

Thank you for selecting a CAHA Midi Boiler.  This product is the result of extensive research and experience in heating 

system design.  

 This manual is an integral part of the product and should be retained.  Please read it carefully, as it provides 

important information regarding the installation and maintenance of the product.   

The product should only be installed and maintained by a person qualified in the design and installation of heat

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ing systems.   Failure to properly install or maintain the CAHA Midi may lead to injury, death or property damage.

WARNING

Carefully read the instructions contained in the manual as they provide important information regarding safe 

installation and maintenance.  The installation and maintenance must be performed in accordance with current 

standards and according to the manufacturer’s instructions.

In the case of failure or malfunction of the appliance, do not attempt to repair it yourself.  Please contact RVR Energy Tech-

nology Ltd by email at [email protected].

Repairs must be only be carried out by a qualified technicians.   Failure to comply with these requirements can compro

-

mise the safety of the device.

Содержание CAHA Midi 340

Страница 1: ...CAHA Midi Installation Usage and Maintenance Instructions 20180713 Floor standing multi sectional gas boilers Models 340 425 510 and 600...

Страница 2: ...ld water tap and to the fill and drain valve of the boiler Before tightning the coupling in the installation slowly fill the hose with water allowing present air to escape Now open the fill and drain...

Страница 3: ...ump every 24 hours for a short period even if no demand is present This prevents the pump jamming Only when work on the boiler is being carried out may the main electricity supply and gas supply be tu...

Страница 4: ...ot Water DHW 12 4 3 1 External storage tank with thermostat electric 3 way valve 12 4 3 2 External storage tank with NTC sensor 12 4 3 3 DHW priority General behaviour with external storage tank 12 5...

Страница 5: ...C63 30 6 5 4 Pressure drop calculations 31 6 5 5 Installing flue exhaust and air inlet 34 6 5 5 1 General 34 6 5 5 2 Brackets mounting 35 6 5 5 3 Sealing and JOINING 35 6 6 Electrical connection 36 6...

Страница 6: ...10 INSPECTION COVER 11 AIR SUPPLY 12 GAS PIPE 13 AIR INTAKE RETARDER 14 OVERHEAT LIMITER SWITCH 15 GAS VALVE 16 FAN 17 FLOW 18 FLUE GAS NTC 19 RETURN 20 FLUE GAS OUT 21 SYPHON 22 SUMP INSPECTION COVE...

Страница 7: ...25 41 8 52 3 62 8 73 2 m3 h Gasflow min load G25 8 4 10 5 12 6 14 6 m3 h Gasflow max load G20 36 45 54 63 m3 h Gasflow min load G20 7 2 9 10 8 12 6 m3 h CO2 content max load G25 G20 9 3 9 3 9 3 9 3 CO...

Страница 8: ...50 GN17 01 Gas valve Dungs 230 VAC MBC 700 SE S02 MBC 700 SE S02 MBC 700 SE S02 MBC 700 SE S02 Venturi Honeywell VMU500A VMU500A VMU680 VMU680 Texi Burner round 130 mm Worgas 433 529 623 718 Silencer...

Страница 9: ...e mixed with the air flow This mixture is supplied to the burner Ignition and flame control of the mixture is done by two separate electrodes mounted on the burnerhood Temperature control and safeguar...

Страница 10: ...vanced CH settings CH request OTC only must be selected The outdoor sensor is then automatically detected by the controller The parameters corre sponding with A E in the figure below can be set in the...

Страница 11: ...mum capacity or set temperature has been reached Once heat demand has finished the burner will turn off following a set post purge period The graph below illustrates this 4 2 6 PROTECTION AGAINST INSU...

Страница 12: ...st to sensor Note The resistance of the NTC sensor must have a value of 12 kOhm at 25 C The 2 wires of the tank NTC sensor must be connected to numbers 7 and 8 on terminal strip C2 The set point tempe...

Страница 13: ...CAHA Midi Installation Usage and Maintenance Instructions 5 BOILER CONTROL 5 1 CONTROL PANEL The control panel has 12 buttons and a display as shown in the figure below 5 2 PUSH BUTTONS ON CONTROL PAN...

Страница 14: ...K button R2 C2 the chosen option will be selected Once an option has been slected it is possible to change the parameters corresponding with the chosen option 5 3 1 PARAMETER VALUE SETTING Pressing th...

Страница 15: ...ard scheduler 2 Scheduler set Select to set scheduler 1 Monday 2 Tuesday 3 Wednesday 4 Thursday 5 Friday 6 Saturday 7 Sunday 8 Monday Friday 9 Monday Sunday 10 Saturday Sunday Used to program on board...

Страница 16: ...format 24 12 Hours is opened When selected ap propriate format screens jump to time entering screen 24 hours Select for 24 hours clock 12 hours Select for 12 hours clock 5 Restore factory data Pressin...

Страница 17: ...ton R2 C2 selects the chosen parameter subgroup Once a parameter subgroup option has been chosen it is possible to change the parameters corresponding with the select ed subgroup Follow the instructio...

Страница 18: ...emand is removed If set OFF heat demand will never be removed by controller Only by removing RT or bridge between terminal strip C2 1 2 4 OTC set point table Show in a table the link between external...

Страница 19: ...m setting Boiler and system parameters 1 Boiler parameters Boiler related parameters 1 Ignition power Set power used when igniting burner DO NOT EXCEED 30 2 Delay siphon check Delay time to validate a...

Страница 20: ...emp 18 0 10V input 19 Target power Will display the information shown in SUBMENU 2 When the line has a at the end of the line means that hitting OK when the line is highlighted will open a graph that...

Страница 21: ...W with thermo stat this is the base boiler flow temperature 2 ECO set point reduction Invoke scheduler menu 3 Scheduler set Invoke scheduler menu 1 Enable disable on board scheduler Based on selection...

Страница 22: ...ump min speed 2 Cascade info 1 Cascade role Role of boiler in cascade mode MASTER SLAVE TERMINAL SLAVE If not in cascade mode STANDALONE 2 System temperature Cascade temperature value Hitting OK when...

Страница 23: ...5 10 ECO WORKING MODE When the ECO button R3 C4 is pressed a programmable value see user menu 1 HEATING under 2 ECO set point re duction is automatically subtracted from the flow temperature setpoint...

Страница 24: ...set to factory check settings 6 CHIMNEY SWEEPER OFF 0 100 7 DIAGNOSTICS 1 Boiler information Real time boiler status 2 Lockout history Overview lockout history Status boiler at time of lock block Tech...

Страница 25: ...CO setpoint reduction 50 0 50 3 Scheduler set 1 Enable disable on board scheduler Enabled Disabled Enabled 2 Scheduler set Set time scheduler Time On ECO OFF 1 DHW setpoint NTC sensor 60 35 65 1 DHW s...

Страница 26: ...the rear This water will then drain into the syphon and fill it 6 2 FROST PROTECTION The boiler is protected against frost If the boiler detects an NTC flow temperature below 8 C the CH pump will be a...

Страница 27: ...tches the hydraulic resistance of the boiler and the installation The graph below shows the resistance characteristics for the different boiler models For electrical connections see chapter 6 7 6 3 2...

Страница 28: ...if the conductivity is higher than the values mentioned above empty the system flush and fill with clean tap water prefeably by adding the recommended cleaning products The water pressure must be hig...

Страница 29: ...pressure for the gas valve is 50 mbar 10 Check the heat input of the boiler The load as given on the type plate should be checked 6 5 AIR SUPPLY AND FLUE GAS CONNECTION Air connection All types have...

Страница 30: ...n the table below Model Part Load Vol Flue m3 h Vol Air m3 h CO2 T Fluegas C rho kg m3 340 68 88 76 9 1 30 1 12 425 85 110 95 9 1 30 1 12 510 102 132 115 9 1 30 1 12 600 119 154 134 9 1 30 1 12 The ma...

Страница 31: ...se the next two tables on the following pages PRESSURE DROP TABLE PER COMPONENT Boiler type 1 2 3 4 5 6 7 8 340 425 510 600 Pressure drop Pa Flue gas Pa Air Pa Flue gas Pa Air Pa Flue gas Pa Air Pa Fl...

Страница 32: ...slate steep LEAD 210 25 45 Per Application How to use the table Column 1 used material Column 2 total number of used material of column 1 for flue gas out Column 3 total number of used material of co...

Страница 33: ...with a fall of 3 50 mm per mtr downwards towards the boiler to allow condensate to flow back in the sump or condensate collector The minimum insert length into the sleeve and the minimum length of the...

Страница 34: ...ckets 1 mtr should be equipped with a non clamping to allow minor movement bracket in between Vertical pipes should be bracketed equally divided with a maximum distance of 2 mtrs between the brackets...

Страница 35: ...advanced CH settings CH request select only OTC 7 If a storage tank is connected to the boiler the tank thermostat or the tank NTC should be connected to the numbers 7 and 8 on the strip C2 Note that...

Страница 36: ...2 1 X05 1 2 3 4 C1 C1 D X05 1 5 4 3 2 61718 12 6 1 2 3 7 8 9 24 25 29 30 D X05 BC L 1 2 3 4 C2 N V1 V2 PE PE N 230V A P CH P DHW P A OT RT C P B B OTC 0 10Vdc DHW or SPS B B L ground pwm white yellow...

Страница 37: ...p A P Appliance pump max 0 8A HE Heat exchanger NTC1 Flow temperature sensor NTC2 Return temperature sensor NTC3 Domestic hot water sensor or switch NTC4 Outside temperature sensor NTC5 Flue gas tempe...

Страница 38: ...o the sump P1 prevents overflow of the syphon in the case of excess back pres sure in the flue The air pressure switch P1 and P2 connected to the venturi checks the amount of air by means of a p measu...

Страница 39: ...the control checks if the contacts of the gas pressure syphonpressure and water pressure switch es are closed If not the boiler will block and the display will show E76 9 If gas water syphon pressure...

Страница 40: ...E Sweden I2H 20 ES Spain I2H 20 SL Slovenia I2H 20 FI Finland I2H 20 SK Slovakia I2H 20 FR France I2Esi I2Er 20 25 NO Norway I2H 20 GB United Kingdom I2H 20 CH Switzerland I2H 20 GR Greece I2H 20 LI L...

Страница 41: ...ble and measure CO2 If required correct CO2 with the throttle turning towards gives a higher CO2 percentage a turn 180 causes a change of approximately 0 85 CO2 ADJUSTMENT FOR MIN LOAD Wait until the...

Страница 42: ...ng thin screw driver Then remove the protective cover of the Maxsys Replace the 230 V fuse s F1 T3 15 AL 250V and or F2 T3 15 AL 250V inside the Maxsys A blown fuse in the Maxsys controller could be c...

Страница 43: ...l panel is switched off boiler off Room thermostat defect incorrect wiring temperature set too low Outdoor sensor and or its wiring defect CH operation off 3 way valve defect remains in direction towa...

Страница 44: ...open E80 Return Flow E87 External limit open Soft Lockouts Soft Lockout Code Description E7 High flue temperature E12 Internal control fault E13 Reset limit reached E25 Internal control fault E32 DHW...

Страница 45: ...heat exchanger should be inspected and if necessary be cleaned If the bottom part of the heat exchanger is clogged the inspection covers on the left hand side of the heat exchanger should be removed U...

Страница 46: ...haust outlet or due to mal functioning of the fan or other causes At maximum load the installation should be designed for nominal T of 15 K to 20 K When the T is higher than 25 K the boiler cannot con...

Страница 47: ...47 CAHA Midi Installation Usage and Maintenance Instructions...

Страница 48: ...Contact us RVR Energy Technology Limited Kenmare Co Kerry V93 F386 Ireland Sales direct line 353 0 64 6689522 Email sales rvr ie...

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