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Summary of Contents for Rotex RKOMB22AAV1
- Page 1 RKOMB22AAV1 RKOMB28AAV1 RKOMB33AAV1 Installation instructions English ROTEX Heating Systems GmbH...
- Page 2 2P369568-2...
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Page 4: Table Of Contents
All rights reserved. The information provided applies to the product in its standard version. ROTEX Heating Systems GmbH can therefore not be held liable for any damages arising from any specifications of the product which deviate from the standard version. The available information has been compiled with the greatest possible care, but ROTEX Heating Systems GmbH can not be held liable for any mistakes in the information, or for any consequences thereof. - Page 5 Service and technical support for the installer For information about specific settings, installation, maintenance and repair work, as an installer, please contact your local Rotex dealer Identification of the product You will find the unit details on the type plate on the bottom of the unit.
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Page 6: Safety Instructions
UNIT DESCRIPTION General The Rotex RKOMB*AAV1 wall-mounted gas boiler is a closed unit. The unit is intended to provide heat to the water of a CH-installation and the domestic hot water installation. The air supply and combustion gas outlet can be connected to the unit by means of two separate pipes. - Page 7 ) the controller will switch to domestic water operation (code ). During domestic hot water operation, the rpm of the fan, and therefore the power of the unit, is controlled by the controller on the basis of the set tap water temperature. ROTEX Heating Systems GmbH...
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Page 8: Pc Interface
This must be connected in accordance with the electrical diagram (see par. 10.1). Note When the unit is switched off ( on the service display) the unit frost protection will remain active, however a heating request from an (external) frost thermostat will be ignored. ROTEX Heating Systems GmbH... -
Page 9: Main Components
Domestic hot water sensor S3 Siphon Flow sensor Heat exchanger Pressure sensor central heating Operating panel and display Connection wire 230 V ~ with earthed plug Ionization / ignition pen Manual air bleed Position of data plate Sight glass ROTEX Heating Systems GmbH... -
Page 10: Accessories
EKVK4AA Cover plate EKCP1AA Outdoor sensor EKOSK1AA 3-Way valve set EK3WV1AA Flue gas adapter Concentric 80x125 EKHY090717 Ø Flue gas adapter Parallel 80 mm EKHY090707 Propane conversion set *KOMB28AAV1 EKHY075787 &KOMB33AAV1 Propane conversion set *KOMB22AAV1 EKPS075867 ROTEX Heating Systems GmbH... -
Page 11: Installation
G ½” (int) Tap water cold G ½” (ext) Tap water warm G ½” (ext) Condense outlet Ø dn25 (flexible) 517mm RKOMB22AAV1 577mm RKOMB28AAV1 637mm RKOMB33AAV1 590mm RKOMB22AAV1 650mm RKOMB28AAV1 710mm RKOMB33AAV1 Flue gas outlet/air Ø60/100 (concentric) inlet ROTEX Heating Systems GmbH... - Page 12 Return CH G ¾” (ext) G ½” (int) Tap water cold G ½” (ext) Tap water warm G ½” (ext) Condense outlet Ø dn25 (flexible) 770mm RKOMB22AAV1 830mm RKOMB28AAV1 890mm RKOMB33AAV1 Flue gas outlet/air Ø60/100 (concentric) inlet ROTEX Heating Systems GmbH...
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Page 13: Installation Space
Beware that in case of a tapping demand, the water can initially have a higher water temperature than requested. In this case, it is recommended to install a thermostatic valve to prevent scalding. This can be done according to the schematics below. ROTEX Heating Systems GmbH... -
Page 14: Assembly
Place the filling loop on the connections of the return and cold water nipple • following the connection kit installation instruction The boiler can now be placed on B-pack simultaniously sliding the pipes of the boiler into the valves in the assembly bracket ROTEX Heating Systems GmbH... - Page 15 Suspend the converted top edge of the cover plate from the washers underneath the bottom of the unit, and slide the cover plate as far back as possible. Please note: When installing the boiler in combination with a cover plate, the siphon will extend underneath the cover plate. ROTEX Heating Systems GmbH...
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Page 16: Connecting
(D). Make sure there is a minimal water circulation. See par. 7.3. Connection diagram underfloor heating Boiler Pump Thermostatic control valve Check valve spring operated Electrical valve 230 V ~ Radiators G. Space/clock thermostat Maximum thermostat ROTEX Heating Systems GmbH... - Page 17 In case of a underfloor heating system without pump, we recommend changing the following parameter settings: par. o from 0 to 3. par. P from 5 to 2. Parameter 3 must also be set to its minimum level, or the transmission loss of the property. ROTEX Heating Systems GmbH...
- Page 18 2 may be an OpenTherm thermostat or an on/off thermostat. Connection diagram regulation “external heat source” Boiler Electrical shut-off valve 230 V ~ Radiators Room thermostat zone 1 Room thermostat zone 2 Zone 1 Zone 2 ROTEX Heating Systems GmbH...
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Page 19: Connecting Dhw Installation
This pollution could cause a fault during domestic hot water operation. Resistance graph tap circuit unit A. RKOMB22AAV1 B. RKOMB28AAV1 C. RKOMB33AAV1 X. Water pipe pressure (Bar) Y. Flow rate (L/min, tolerance ± 10%) ROTEX Heating Systems GmbH... -
Page 20: Connecting Electronically
Temperature regulation Connector X4 Comments Room thermostat on/off 6 - 7 Modulating thermostat with 11 - 12 comfort function in use Outdoor temperature 8 - 9 sensor Frost thermostat 6 - 7 Parallel over room thermostat ROTEX Heating Systems GmbH... - Page 21 RF room thermostat menu of the boiler controller. You will automatically exit the test mode 1 minute after the last test message of the RF room thermostat has been received. ROTEX Heating Systems GmbH...
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Page 22: Connecting Gas
.Place a gas sieve in the connection for the unit if the gas may be contaminated. Connect the gas pipe in the gas valve using appropriate seal.. Check the gas carrying parts for leakages at a pressure of up to 50 mbar. The gas pipe should be fitted pressure free. ROTEX Heating Systems GmbH... -
Page 23: Flue Gas Output And Air Input
Feedthrough Rotex Other parts Gastec QA or Rotex Feedthrough Rotex Feedthrough at the Prefab chimney Gastec QA, Rotex or third parties Other parts In accordance to applicable national or local legislation All materials Gastec QA or Rotex At the CLV system... -
Page 24: Outlet Systems
From the unit, every pipe has to be slid into the previous one. Mount a non-vertical combustion gas outlet pipe on a slope towards the unit (min. 5mm/m). Fit the assembly brackets in accordance with the assembly instructions of the supplier of the air supply/flue tube system. ROTEX Heating Systems GmbH... - Page 25 Rotex C63 all materials C83 all materials Rotex C93 all materials Rotex Gas exhaust/air intake parts can be bought from a 3rd party. All parts purchased from an external supplier MUST comply with EN14471. NOT allowed ROTEX Heating Systems GmbH...
- Page 26 Fit the exhaust rosters onto the input and output pipe. Attach these to the pipes. Fit the double pipe feedthrough ensuring that the air supply is sloped outwards and the flue gas output is sloped towards the unit. ROTEX Heating Systems GmbH...
- Page 27 Slide the combustion gas outlet and possibly also the air supply pipe into the output and input pipe of the double pipe feedthrough. Fit the combustion gas outlet pipe and air supply pipe on a slope towards the unit. Fit the exhaust rosters on both pipes. ROTEX Heating Systems GmbH...
- Page 28 Slide the wall feedthrough into the grooves and turn it into such a position that the flue tube pipe ends up in the highest position. Cover the grooves with wall plates. Fit the combi feedthrough to the boiler directly or via an extension pipe. ROTEX Heating Systems GmbH...
- Page 29 Fit the exhaust roster onto the combi feedthrough and attach it to the inner pipe. Slide the combi feedthrough (C) from inside to outside through the horizontal roof feed-through panel, in accordance with the given measurements. Fit the combi feedthrough (C) on a slope towards the unit. ROTEX Heating Systems GmbH...
- Page 30 In case of a sloped roof, through the vertical feed-through panel with scale. In case of a flat roof, through the adhesive panel. In case of a parallel connection, fit the manifold of the combi feedthrough and secure it with a sheet metal screw or pop rivet. ROTEX Heating Systems GmbH...
- Page 31 In case of a flat roof or an architectural chimney, fit a standard ventilation feedthrough (Ø80 mm) with rain cap in an associated adhesive roof panel. CAUTION Two outlets must be at least 200 mm apart. ROTEX Heating Systems GmbH...
- Page 32 90 m RKOMB33AAV1 85 m Combustion gas outlet and air supply pipe For assembly, see par. 5.6.5 General assembly. Prefab chimney assembly The outlet can be made on any place on the sloped or flat roof surface. ROTEX Heating Systems GmbH...
- Page 33 Fit a roof panel suitable for a double-walled combustion gas outlet Ø80 mm (diameter Ø96 mm) in a flat roof. Slide the double-walled combustion gas outlet from outside to inside through the roof through feed. The outlet should end up at least 500 mm above the roof surface. ROTEX Heating Systems GmbH...
- Page 34 On a flat roof, the outlet of the combustion gas outlet must be made in the “free” outlet area. Fit a condense output. Note The communal outlet is certified in combination with the unit. ROTEX Heating Systems GmbH...
- Page 35 The minimum diameters of the communal air supply and flue tube system based on addendum 2001-02 inspection requirements no. 138 of Gastec. RKOMB22AAV1 and RKOMB33AAV1 RKOMB28AAV1 Number of units Concentric Parallel Concentric Parallel Flue Flue Flue Flue outlet inlet outlet inlet outlet inlet outlet inlet ROTEX Heating Systems GmbH...
- Page 36 When using plastic flue tube material, a minimum temperature class of T120 applies. The transfer bend between concentric and vertical flue connection in the shaft must be supported in the manner instructed by Rotex. The assembly instruction of the manufacturer of the flue tube system must always be followed in full.
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Page 37: Commissioning The Unit And The Installation
Check all couplings for leaks. 6.1.3 Gas supply Aerate the gas pipe with the initial pressure measuring nipple (D) on the gas block. Check all couplings for leaks. Check the initial pressure and offset pressure (see par. 7.7). ROTEX Heating Systems GmbH... -
Page 38: Commissioning The Unit
This automatic switching on of the pump takes place 24 hours after the lastheating request. To change the time, the room thermostat must be turned up for a moment at the requested time. For the hot water provision, the pump will not run. • ROTEX Heating Systems GmbH... -
Page 39: Switching Off The Unit
If an (external) frost thermostat has been fitted on the installation and has been connected to the unit, it will not be active if the unit on the operating panel is switched off ( on service display). ROTEX Heating Systems GmbH... -
Page 40: Setting And Adjustment
- button to enter the temperature between 30°C and 90°C (standard setting 80°C). Tap water temperature Press the button until the LED at starts flashing. Use the and - button to enter the temperature between 40°C and 65°C (standard setting 60°C). ROTEX Heating Systems GmbH... -
Page 41: Parameter Settings Via The Service Code
1= step-by-step modulation on during CH operation 2= Power control by Open Therm room thermostat enabled Minimum rpm CH Settings reach 20 – 50% (40%=propane) Activation external power saving switch 0= external power saving switch input (connector X4, pos 4-5) ROTEX Heating Systems GmbH... - Page 42 Settings reach 50 – 99% of the set maximum rpm (propane=50%) Max. rpm fan (* 100 rpm) Settings reach 40 – 50 (RKOMB22AAV1, RKOMB28AAV1 and RKOMB33AAV1) This parameter can be used to set the maximum rpm Regulated temperature during boiler Setting reach 60°C - 90°C...
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Page 43: Setting Maximum Ch Power
Pump setting I Pump setting II Pump setting III Feed-through amount in l/h Pressure loss / water head level in mWk Example: At 500 l/h, the RKOMB28AAV1 has 4 mWk left over in pump setting III. ROTEX Heating Systems GmbH... -
Page 44: Weather Dependent Regulation
T leaving water in °C Factory setting (Tmax CH = 80°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C) Example (Tmax CH = 60°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C) ROTEX Heating Systems GmbH... -
Page 45: Conversion To Different Type Of Gas
Gas dosing ring Natural gas Propane P RKOMB22AAV1 RKOMB28AAV1, RKOMB33AAV1 CAUTION check must be carried out with open cover. If the cover is shut, the CO % may be higher than the values stated in the above table. ROTEX Heating Systems GmbH... -
Page 46: Setting Gas/Air Regulation
CO value at Natural gas Natural gas G25 Propane G31 Propane G31 minimum power (in Belgium) (30/50 mbar) (37 mbar) Maximum value Minimum value (a) CO value at maximum power registered at setting High. ROTEX Heating Systems GmbH... - Page 47 No adjustments may be made to the gas valve without prior permission from your local ROTEX distributor. In Belgium, the gas valve may NOT be adjusted and/or the seal may NOT be removed or broken.
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Page 48: Malfunctions
Replace boiler controller for the appropriate version. • 29,30 Gas valve controller fault Replace boiler controller. • Only replace faulty parts with the original Rotex parts. Failing to fit or incorrectly fitting the sensors S1 and/or S2 may lead to serious damage. ROTEX Heating Systems GmbH... -
Page 49: Other Faults
Insert a screwdriver into the slot of the pump shaft and turn the shaft. Replace faulty pump. No No electrical supply (24 V). Yes Replace the faulty controller. Check the wiring in accordance with the diagram. ROTEX Heating Systems GmbH... - Page 50 Possible causes: Solution/cause: Tap flow too high. Yes Reduce the tap flow. Check the dosing disk (RKOMB22AAV1 and RKOMB28AAV1) No Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in CH becomes hot during tapping.
- Page 51 CH installation is heated due to Tap comfort. Yes the CH circuit. Install a check valve in case of thermosiphon effect or a two-way The service display regularly shows code 7. valve in case of a second pump. ROTEX Heating Systems GmbH...
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Page 52: Maintenance
Clean the bottom of the heat exchanger. Clean the condense outlet tray with water. Clean the siphon with water. Only clean the bottom of the front plate. CAUTION The integrated insulation plate and gasket boiler controller contain ceramic fibers. ROTEX Heating Systems GmbH... - Page 53 (10 – 12 Nm). For the sequence of tightening, see image. Please note: The front plate in the image has 11 shoulder bolts (RKOMB28AAV1, RKOMB33AAV1). The front plate of the RKOMB22AAV1 has 9 shoulder bolts. Evenly manually tighten the boiler controller bolts crosswise.
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Page 54: Technical Specifications
** Time needed from beginning of draining in order to achieve a temperature increase of 40K to the hot water outlet of the device based on the CH hot water flow. *** The maximum CH power is set in the factory. For the set value see the parameter list (par. 7.2 ). Also see par. 7.3 Setting CH power. ROTEX Heating Systems GmbH... -
Page 55: Electrical Diagram Rkomb22Aav1, Rkomb28Aav1 & Rkomb33Aav1
10.1 Electrical diagram RKOMB22AAV1, RKOMB28AAV1 & RKOMB33AAV1 Earth connection exchanger Fuse (3.15A T) CH pump DHW sensor Ignition hood Gas block + ignition module Resistance Flow sensor Boiler controller Ignition/ionization pin Leaving water sensor CH water pressure sensor Earth connections... -
Page 56: Warranty Conditions
WARRANTY CONDITIONS The general warranty conditions of Rotex Heating Systems GmbH apply to this product. The warranty is void if it is determined that the faults, damages, or undue wear are attributable to improper use or inexpert treatment or inexpert repair, setting, installation or maintenance, by non-certified installers, or that it was exposed to substances with aggressive chemicals (incl. - Page 60 4P374377-1A 885537...
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