Elco (Rendamax) R300/306 spare parts

In brief

Instalpunt supplies 107 original parts for the Elco (Rendamax) R300/306, including fans, sensors, temperature sensors and NTC sensors. Order online.

107Spare parts
21In stock
€7.84From
22Types

Looking for parts for the Elco (Rendamax) R300/306 (boiler)? Below are all 107 original parts, grouped by part type. Choose a type to jump straight to the right table.

Quick left to the right part for the Elco (Rendamax) R300/306

Part	From	Delivery
Fan Rendamax fan old no.: RVA074CS	€1,135.95	In stock
Ignition part Rendamax ionisation electrode	€56.95	In stock
Flow sensor Elco Caleffi flow switch (Rendamax)	€281.95	In stock
Temperature sensor Rendamax outdoor sensor 1k old no.: RTV015	€72.95	In stock
Burner control unit Rendamax burner control unit km628 cv/cvi type 3/7 old no.: RBA058KS	€906.95	In stock

Prices incl. VAT, taken directly from our checkout. Below is the complete parts list for this model.

Installer or self-employed engineer? Create a business account: prices excl. VAT and invoices in your company name.

Fans for the Elco (Rendamax) R300/306 (1) all Elco (Rendamax) fans →

Part	Item no. / mfr. no.	Price	Stock
Rendamax fan old no.: RVA074CS	8551938 Mfr. no. 65000320	€1,135.95	In stock	View & order

Sensors for the Elco (Rendamax) R300/306 (1)

Part	Item no. / mfr. no.	Price	Stock
Rendamax FBR2 old no.: EBA052	8551258 Mfr. no. 65108162	€108.95	Made-to-order item	View & order

Temperature sensors and NTC sensors for the Elco (Rendamax) R300/306 (3) all Elco (Rendamax) temperature sensors and NTC sensors →

Part	Item no. / mfr. no.	Price	Stock
Rendamax sensor 5k flue gas r600 flow sensor old	8551924 Mfr. no. 12084575	€80.95	In stock	View & order
Rendamax outdoor sensor 1k old no.: RTV015	8551919 Mfr. no. 64921170	€72.95	In stock	View & order
Rendamax sensor SPFS DHW E8/KKM8 old no.: RTV070	8551925 Mfr. no. 64921172	€87.95	Made-to-order item	View & order

Flow sensors and flow switches for the Elco (Rendamax) R300/306 (1)

Part	Item no. / mfr. no.	Price	Stock
Elco Caleffi flow switch (Rendamax)	8551892 Mfr. no. 64210206-01	€281.95	In stock	View & order

Pressure switches and differential pressure switches for the Elco (Rendamax) R300/306 (2) all Elco (Rendamax) pressure switches and differential pressure switches →

Part	Item no. / mfr. no.	Price	Stock
Rendamax air pressure monitor	8552136 Mfr. no. 64280407	€118.95	In stock	View & order
Rendamax min. gas pressure switch old no.: RSD020	8551885 Mfr. no. 64401601	€112.95	Made-to-order item	View & order

Gas valves and gas control for the Elco (Rendamax) R300/306 (3) all Elco (Rendamax) gas valves and gas control →

Part	Item no. / mfr. no.	Price	Stock
Rendamax gas valve old no.: RKH025	8551653 Mfr. no. 64280007	€1,395.95	Made-to-order item	View & order
Rendamax gas valve old no.: RKH031CS	8551655 Mfr. no. 65000259	€1,152.95	Made-to-order item	View & order
Rendamax venturi VMU300A1004 old no.: RKV003CS	8551703 Mfr. no. 64201524	€358.95	Made-to-order item	View & order

PCBs and controls for the Elco (Rendamax) R300/306 (3) all Elco (Rendamax) PCBs and controls →

Part	Item no. / mfr. no.	Price	Stock
Rendamax cxe expansion PCB old no.: REM006AAAS	8551615 Mfr. no. 64280310-01	€634.95	In stock	View & order
Rendamax COCO2 old no.: RCC006	8551594 Mfr. no. 64200564	€152.95	Made-to-order item	View & order
Rendamax E8 group controller old no.: RBM021AS	8551592 Mfr. no. 65000252	€594.95	Made-to-order item	View & order

Burner control units for the Elco (Rendamax) R300/306 (3) all Elco (Rendamax) burner control units →

Part	Item no. / mfr. no.	Price	Stock
Rendamax burner control unit km628 cv/cvi type 3/7 old no.: RBA058KS	8551570 Mfr. no. 65000235-01	€906.95	In stock	View & order
Rendamax burner control unit KM628 CV/CVI type 3/7 LPG old no.: RBA058TS	8551579 Mfr. no. 65000244	€742.95	Made-to-order item	View & order
Rendamax burner control unit KM628 CV/KS type 3/7 old no.: RBA058BS	8551565 Mfr. no. 65000227-01	€1,203.95	Made-to-order item	View & order

Ignition and ionisation for the Elco (Rendamax) R300/306 (2) all Elco (Rendamax) ignition and ionisation →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ionisation electrode	8551606 Mfr. no. 64201562	€56.95	In stock	View & order
Rendamax ignition pin	8552127 Mfr. no. 64202263	€56.95	In stock	View & order

Siphons and condensate drains for the Elco (Rendamax) R300/306 (2) all Elco (Rendamax) siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Rendamax siphon for 2708	8552129 Mfr. no. 64201836	€48.95	In stock	View & order
Rendamax condensate tray R306, R506 old no.: 506R1A1AS	8550818 Mfr. no. 65108048	€1,319.95	Made-to-order item	View & order

Thermostats and controls for the Elco (Rendamax) R300/306 (1)

Part	Item no. / mfr. no.	Price	Stock
Rendamax thermostat imit ls1 3m capillary old no.: RTR105AS	8551915 Mfr. no. 64300004	€56.95	In stock	View & order

Burners for the Elco (Rendamax) R300/306 (1) all Elco (Rendamax) burners →

Part	Item no. / mfr. no.	Price	Stock
Rendamax burner/heat exchanger old no.: 306U1AS	8550527 Mfr. no. 64200278	€16,894.95	Made-to-order item	View & order

Valves for the Elco (Rendamax) R300/306 (3) all Elco (Rendamax) valves →

Part	Item no. / mfr. no.	Price	Stock
Rendamax solenoid valve Flo Control 230V 2-way old no.: RKS045	8551693 Mfr. no. 64200283	€137.95	Made-to-order item	View & order
Rendamax safety valve old no.: ROV003	8551784 Mfr. no. 64211302	€111.95	Made-to-order item	View & order
Rendamax fill/drain valve 1/2 old no.: RAK008	8551551 Mfr. no. 64211228	€70.95	Made-to-order item	View & order

Pressure gauges for the Elco (Rendamax) R300/306 (2)

Part	Item no. / mfr. no.	Price	Stock
Rendamax pressure gauge 1/4 0-4 bar old no.: ROM025	8551774 Mfr. no. 64210903	€54.95	In stock	View & order
Rendamax pressure gauge 1/4 0-6 bar old no.: ROM035	8551777 Mfr. no. 65000289	€391.95	Made-to-order item	View & order

Electrical parts for the Elco (Rendamax) R300/306 (7) all Elco (Rendamax) electrical parts →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ignition transformer ETH007E old number: ETH007ES	8551998 Mfr. no. 64201641	€174.95	In stock	View & order
Rendamax relay Allen Bradley 100-K09-KF10 old no.: ERT031	8551312 Mfr. no. 64201538	€138.95	Made-to-order item	View & order
Rendamax relay Finder 55.34, 8230.0040 old no.: ERH031	8551296 Mfr. no. 64211221	€66.95	Made-to-order item	View & order
Rendamax relay conversion kit incl. thermal relay old no.: ERT031AS	8551313 Mfr. no. 64201539	€313.95	Made-to-order item	View & order
Rendamax relay base Finder time relay old no.: ERV011	8551318 Mfr. no. 64211314	€62.95	Made-to-order item	View & order
Rendamax isolating transformer VE016 160VA old no.: ETS005	8551358 Mfr. no. 64211410	€363.95	Made-to-order item	View & order
Rendamax power transformer for KM628 220/24-15-11V old no.: ETR055	8551357 Mfr. no. 64202438	€229.95	Made-to-order item	View & order

Cables and wiring harnesses for the Elco (Rendamax) R300/306 (7) all Elco (Rendamax) cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ionisation cable old no.: EVD001GS	8551372 Mfr. no. 65108204	€202.95	Made-to-order item	View & order
Rendamax cable old no.: ESK160AS	8551329 Mfr. no. 64210209	€213.95	Made-to-order item	View & order
Rendamax cable old no.: RKF058AS	8551641 Mfr. no. 12084619	€254.95	Made-to-order item	View & order
Rendamax cable old no.: EVS455AS	8551391 Mfr. no. 64201514	€227.95	Made-to-order item	View & order
Rendamax cable old no.: EKB050	8551268 Mfr. no. 65108168	€92.95	Made-to-order item	View & order
Rendamax ignition cable old no.: ESB025	8551324 Mfr. no. 12067866	€92.95	Made-to-order item	View & order
Rendamax PC communication set old no.: EIO005AS	8551266 Mfr. no. 64200885	€967.95	Made-to-order item	View & order

Gasket sets for the Elco (Rendamax) R300/306 (1) all Elco (Rendamax) gasket sets →

Part	Item no. / mfr. no.	Price	Stock
Rendamax seal kit R504/R304 old no.: 506U2AS	8550820 Mfr. no. 65108049	€635.95	Made-to-order item	View & order

Gaskets and seals for the Elco (Rendamax) R300/306 (17) all Elco (Rendamax) gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Rendamax O-ring old no.: ARO030	8551072 Mfr. no. 64201315	€38.95	In stock	View & order
Rendamax gasket old no.: 506M121	8550815 Mfr. no. 64201390	€92.95	In stock	View & order
Rendamax gasket old no.: ARP555	8551128 Mfr. no. 65000483	€38.95	In stock	View & order
Rendamax gasket for e.g. R300/307 64202029	8552154 Mfr. no. 64202029	€93.95	Made-to-order item	View & order
Rendamax O-ring old no.: DLS020	8551207 Mfr. no. 64200919	€128.95	Made-to-order item	View & order
Rendamax O-ring old no.: ARO306	8551091 Mfr. no. 65108144	€46.95	Made-to-order item	View & order
Rendamax gasket old no.: ARP390	8551123 Mfr. no. 64200983	€50.95	Made-to-order item	View & order
Rendamax gasket old no.: 506R104	8550817 Mfr. no. 64200499	€195.95	Made-to-order item	View & order
Rendamax gasket old no.: ARP321	8551117 Mfr. no. 64200986	€48.95	Made-to-order item	View & order
Rendamax gasket old no.: ARP331	8551118 Mfr. no. 64200984	€48.95	Made-to-order item	View & order
Rendamax gasket old no.: 500W1AS	8550741 Mfr. no. 12037561	€310.95	Made-to-order item	View & order
Rendamax gasket old no.: DSN065	8551232 Mfr. no. 17017057	€49.95	Made-to-order item	View & order
Rendamax gasket for e.g. R300/307 64202030	8552155 Mfr. no. 64202030	€86.95	Made-to-order item	View & order
Rendamax gasket old no.: ARP271	8551113 Mfr. no. 64200325	€32.95	Made-to-order item	View & order
Rendamax O-ring old no.: 500WWAS	8552120 Mfr. no. 64201674	€321.95	Made-to-order item	View & order
Rendamax gasket old no.: CRS020	8551167 Mfr. no. 17004742	€70.95	Not available	View & order
Rendamax gasket old no.: ARP055AS	8551099 Mfr. no. 12016166	€106.95	Made-to-order item	View & order

Pipes, tubes and hoses for the Elco (Rendamax) R300/306 (12) all Elco (Rendamax) pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Rendamax flow pipe CH R505	8550796 Mfr. no. 64200393	€138.95	Made-to-order item	View & order
Rendamax flow piece old no.: GGU010BS	8551451 Mfr. no. 65000198	€1,505.95	Made-to-order item	View & order
Rendamax flow piece old no.: GGU010AS	8551450 Mfr. no. 64201530	€1,475.95	Made-to-order item	View & order
Rendamax immersion sleeve 1/2 old no.: RTP013	8551902 Mfr. no. 17006755	€97.95	Made-to-order item	View & order
Rendamax immersion sleeve 1/4 d7.2mm old no.: RTP065	8551903 Mfr. no. 4478694220	€87.95	Made-to-order item	View & order
Rendamax immersion sleeve 1/4 d8.5 mm old no.: RTP085	8551906 Mfr. no. 64200059	€111.95	Made-to-order item	View & order
Rendamax elbow 1/4 x 8 mm old no.: FKM190	8551417 Mfr. no. 64200854	€57.95	Made-to-order item	View & order
Rendamax elbow 1/8 x 8 mm old no.: FKM185	8551416 Mfr. no. 64200855	€57.95	Made-to-order item	View & order
Rendamax plastic hose old no.: DSN005	8551213 Mfr. no. 64280527	€65.95	Made-to-order item	View & order
Rendamax return pipe old no.: 505W1M1	8550809 Mfr. no. 64200387	€114.95	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU030CS	8551459 Mfr. no. 64201529	€1,404.95	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU030BS	8551458 Mfr. no. 64201527	€1,428.95	Made-to-order item	View & order

Casing and panels for the Elco (Rendamax) R300/306 (4) all Elco (Rendamax) casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Rendamax housing old no.: ROM026	8551775 Mfr. no. 64200087	€63.95	Made-to-order item	View & order
Rendamax top plate R306, R506 old no.: 506M1MBAS	8550816 Mfr. no. 64201525	€1,089.95	Made-to-order item	View & order
Rendamax radiation plate rear complete old no.: 506W1N1AS	8550824 Mfr. no. 65108052	€378.95	Made-to-order item	View & order
Rendamax radiation plate front complete old no.: 503W1P1AS	8550784 Mfr. no. 65108026	€318.95	Made-to-order item	View & order

Insulation for the Elco (Rendamax) R300/306 (1) all Elco (Rendamax) insulation →

Part	Item no. / mfr. no.	Price	Stock
Rendamax air damper insulation old no.: GIN070AS	8551495 Mfr. no. 64210700	€391.95	Made-to-order item	View & order

Fixing material for the Elco (Rendamax) R300/306 (1) all Elco (Rendamax) fixing material →

Part	Item no. / mfr. no.	Price	Stock
Rendamax Tesilock nut M4 self-locking old no.: BMV009	8551142 Mfr. no. 17004599	€55.95	Made-to-order item	View & order

Other parts for the Elco (Rendamax) R300/306 (29)

Part	Item no. / mfr. no.	Price	Stock
Rendamax sight glass complete old no.: DBG010AS	8551175 Mfr. no. 12083849	€120.95	In stock	View & order
Rendamax on/off switch old no.: ELS032AS	8551286 Mfr. no. 64200294	€41.95	In stock	View & order
Rendamax spark plug cap ignition/ionisation electrode old no.: EVD003	8551373 Mfr. no. 64210410	€34.95	In stock	View & order
Rendamax spark plug cap ionisation electrode old no.: EVD001HS	8552107 Mfr. no. 64210409	€23.95	In stock	View & order
Rendamax silicone sealant high temperature (red) old no.: VKS005	8551986 Mfr. no. 64200009	€81.95	In stock	View & order
Rendamax aluminium tape 75 x 50000 old no.: DTA005	8551238 Mfr. no. 65108158	€87.95	Made-to-order item	View & order
Rendamax BM8 weather-compensated controller old no.: RBM006	8551590 Mfr. no. 64200788	€392.95	Made-to-order item	View & order
Rendamax auxiliary relay conversion kit old no.: ERH086AS	8551303 Mfr. no. 65000185	€111.95	Made-to-order item	View & order
Rendamax boiler foot adjustable R600 old no.: GIL100AS	8551490 Mfr. no. 64200820	€50.95	Made-to-order item	View & order
Rendamax sight glass complete old no.: DBG010	8551174 Mfr. no. 64200929	€124.95	Made-to-order item	View & order
Rendamax KKM8 cascade controller old no.: RBM011AS	8551591 Mfr. no. 65000251	€773.95	Made-to-order item	View & order
Rendamax test nipple old no.: RKD001	8551640 Mfr. no. 64211101	€21.95	Made-to-order item	View & order
Rendamax bypass piece R301-R507 old no.: 500WRE1AS	8550742 Mfr. no. 65107997	€1,730.95	Made-to-order item	View & order
Rendamax bypass piece l.b. R300/R500 old no.: 500BRC1AS	8550740 Mfr. no. 65107996	€2,079.95	Made-to-order item	View & order
Rendamax return piece old no.: GGU040AS	8551461 Mfr. no. 64201526	€1,034.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO301	8551089 Mfr. no. 64200374	€84.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO296	8551088 Mfr. no. 64200367	€181.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO286	8551086 Mfr. no. 64200389	€122.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO291	8551087 Mfr. no. 64200385	€63.95	Made-to-order item	View & order
Rendamax room sensor RFB old no.: EBA055	8551259 Mfr. no. 64200889	€90.95	Made-to-order item	View & order
Rendamax choke coil old no.: ETN025	8551354 Mfr. no. 12016276	€125.95	Made-to-order item	View & order
Rendamax snap fastener R6605 old no.: BSS090	8551144 Mfr. no. 64200502	€44.95	Made-to-order item	View & order
Rendamax time relay Finder 85.02.8.240 old no.: ERT027	8551311 Mfr. no. 17008295	€139.95	Made-to-order item	View & order
Rendamax Gluecon 1000 heat-resistant adhesive 64210202 old no.	8551987 Mfr. no. 64210202	€66.95	Made-to-order item	View & order
Rendamax Omnivisc 1050 64210199 old no.: VLS003	8551988 Mfr. no. 64210199	€107.95	Made-to-order item	View & order
Rendamax Permabond A1312 64200600 old no.: VLS050	8551990 Mfr. no. 64200600	€145.95	Made-to-order item	View & order
Rendamax Permabond LH197 65000351 old no.: VLS053	8551991 Mfr. no. 65000351	€109.95	Made-to-order item	View & order
Rendamax Permabond MH052 65000353 old no.: VLS059	8551993 Mfr. no. 65000353	€151.95	Made-to-order item	View & order
Rendamax Permabond old no.: VLS058	8551992 Mfr. no. 65000352	€140.95	Made-to-order item	View & order

Fault code on your Elco (Rendamax) R300/306? This is the part type involved

Common Elco (Rendamax) fault codes and the part type that is usually the cause; the parts for this model are listed above. All codes explained: Elco (Rendamax) fault codes.

Code	What is going on	Part type
1	High-limit thermostat (STB) has tripped.	Thermostats and controls
2	Blocking input was interrupted outside burner operation. An external safety device connected to terminals (18 19) has tripped.	Burners
3	Blocking input was interrupted during burner operation	Burners
4	No flame signal during burner start	Burners
7	Max. flue gas thermostat has tripped	Thermostats and controls
11	Incorrect flame signal. An ionisation current higher than 1 µA was measured while the burner was off.	Ignition and ionisation

For guidance only: the same code can have a different cause depending on the situation.

Other Elco (Rendamax) boilers

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Frequently asked questions

Which parts are available for the Elco (Rendamax) R300/306?

The catalogue lists 107 original parts for the Elco (Rendamax) R300/306, including fans, sensors, temperature sensors and NTC sensors, flow sensors and flow switches. All parts are listed above, grouped by type, with part number and price.

How much does a fan for the Elco (Rendamax) R300/306 cost?

The fans for this model cost €1,379.98 incl. VAT. Check the table "Fans" above for the right part number.

Are the parts for the Elco (Rendamax) R300/306 in stock?

21 of the 107 parts are in stock; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days. Parts marked "Made-to-order item" are ordered specially for you; the delivery time is shown on the product page.

How do I know which part I need for the Elco (Rendamax) R300/306?

Search for the part by part number or use the parts list of the Elco (Rendamax) R300/306.

Are these original Elco (Rendamax) parts?

Yes. All 107 parts in this list are original manufacturer parts for the Elco (Rendamax) R300/306, supplied through the official technical wholesale channel and with the correct part number.

How much do parts for the Elco (Rendamax) R300/306 cost?

Parts for the Elco (Rendamax) R300/306 range from €7.84 to €19,319.73 incl. VAT. The exact price of each part is shown in the tables above.

Can I return a part?

As a consumer you have a 14-day right of withdrawal. You may unpack and inspect the part; do not install or connect it. For a part that has been installed, connected or damaged we deduct the diminished value, up to the full price for circuit boards.