Elco (Rendamax) R300/305 spare parts

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In brief

Instalpunt supplies 108 original parts for the Elco (Rendamax) R300/305, including fans, sensors, temperature sensors and NTC sensors. Order online.

108Spare parts
22In stock
€8.47From
22Types

Looking for parts for the Elco (Rendamax) R300/305 (boiler)? Below are all 108 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) R300/305

Part	From	Delivery
Ignition part Rendamax ionisation electrode	€61.51	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Flow sensor Elco Caleffi flow switch (Rendamax)	€304.51	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Temperature sensor Rendamax outdoor sensor 1k old no.: RTV015	€78.79	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Burner control unit Rendamax burner control unit km628 cv/cvi type 3/7 old no.: RBA058KS	€979.51	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).

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) R300/305 (1) all Elco (Rendamax) fans →

Part	Item no. / mfr. no.	Price	Stock
Rendamax fan old no.: RVA074CS	8551938 Mfr. no. 65000320	€1,303.51	Made-to-order item	View & order

Sensors for the Elco (Rendamax) R300/305 (1)

Part	Item no. / mfr. no.	Price	Stock
Rendamax FBR2 old no.: EBA052	8551258 Mfr. no. 65108162	€117.67	Made-to-order item	View & order

Temperature sensors and NTC sensors for the Elco (Rendamax) R300/305 (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	€87.43	In stock	View & order
Rendamax outdoor sensor 1k old no.: RTV015	8551919 Mfr. no. 64921170	€78.79	In stock	View & order
Rendamax sensor SPFS DHW E8/KKM8 old no.: RTV070	8551925 Mfr. no. 64921172	€94.99	Made-to-order item	View & order

Flow sensors and flow switches for the Elco (Rendamax) R300/305 (1)

Part	Item no. / mfr. no.	Price	Stock
Elco Caleffi flow switch (Rendamax)	8551892 Mfr. no. 64210206-01	€304.51	In stock	View & order

Pressure switches and differential pressure switches for the Elco (Rendamax) R300/305 (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	€128.47	In stock	View & order
Rendamax min. gas pressure switch old no.: RSD020	8551885 Mfr. no. 64401601	€121.99	Made-to-order item	View & order

Gas valves and gas control for the Elco (Rendamax) R300/305 (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	€1,507.63	Made-to-order item	View & order
Rendamax gas valve old no.: RKH031CS	8551655 Mfr. no. 65000259	€1,245.19	Made-to-order item	View & order
Rendamax venturi VMU300A1004 old no.: RKV003CS	8551703 Mfr. no. 64201524	€387.67	Made-to-order item	View & order

PCBs and controls for the Elco (Rendamax) R300/305 (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	€685.75	In stock	View & order
Rendamax COCO2 old no.: RCC006	8551594 Mfr. no. 64200564	€165.19	Made-to-order item	View & order
Rendamax E8 group controller old no.: RBM021AS	8551592 Mfr. no. 65000252	€642.55	Made-to-order item	View & order

Burner control units for the Elco (Rendamax) R300/305 (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	€979.51	In stock	View & order
Rendamax burner control unit KM628 CV/CVI type 3/7 LPG old no.: RBA058TS	8551579 Mfr. no. 65000244	€802.39	Made-to-order item	View & order
Rendamax burner control unit KM628 CV/KS type 3/7 old no.: RBA058BS	8551565 Mfr. no. 65000227-01	€1,300.27	Made-to-order item	View & order

Ignition and ionisation for the Elco (Rendamax) R300/305 (2) all Elco (Rendamax) ignition and ionisation →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ionisation electrode	8551606 Mfr. no. 64201562	€61.51	In stock	View & order
Rendamax ignition pin	8552127 Mfr. no. 64202263	€61.51	In stock	View & order

Siphons and condensate drains for the Elco (Rendamax) R300/305 (2) all Elco (Rendamax) siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Rendamax siphon for 2708	8552129 Mfr. no. 64201836	€52.87	In stock	View & order
Rendamax condensate tray R305, R505 old no.: 505R1A1AS	8550803 Mfr. no. 65108038	€5,032.75	Made-to-order item	View & order

Thermostats and controls for the Elco (Rendamax) R300/305 (1)

Part	Item no. / mfr. no.	Price	Stock
Rendamax thermostat imit ls1 3m capillary old no.: RTR105AS	8551915 Mfr. no. 64300004	€61.51	In stock	View & order

Burners for the Elco (Rendamax) R300/305 (1) all Elco (Rendamax) burners →

Part	Item no. / mfr. no.	Price	Stock
Rendamax burner/heat exchanger old no.: 305U1AS	8550522 Mfr. no. 64200503	€17,857.75	Made-to-order item	View & order

Valves for the Elco (Rendamax) R300/305 (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	€148.99	Made-to-order item	View & order
Rendamax safety valve old no.: ROV003	8551784 Mfr. no. 64211302	€120.91	Made-to-order item	View & order
Rendamax fill/drain valve 1/2 old no.: RAK008	8551551 Mfr. no. 64211228	€76.63	Made-to-order item	View & order

Pressure gauges for the Elco (Rendamax) R300/305 (2)

Part	Item no. / mfr. no.	Price	Stock
Rendamax pressure gauge 1/4 0-4 bar old no.: ROM025	8551774 Mfr. no. 64210903	€59.35	In stock	View & order
Rendamax pressure gauge 1/4 0-6 bar old no.: ROM035	8551777 Mfr. no. 65000289	€423.31	Made-to-order item	View & order

Electrical parts for the Elco (Rendamax) R300/305 (7) all Elco (Rendamax) electrical parts →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ignition transformer ETH007E old number: ETH007ES	8551998 Mfr. no. 64201641	€188.95	In stock	View & order
Rendamax relay Allen Bradley 100-K09-KF10 old no.: ERT031	8551312 Mfr. no. 64201538	€150.07	Made-to-order item	View & order
Rendamax relay Finder 55.34, 8230.0040 old no.: ERH031	8551296 Mfr. no. 64211221	€72.31	Made-to-order item	View & order
Rendamax relay conversion kit incl. thermal relay old no.: ERT031AS	8551313 Mfr. no. 64201539	€339.07	Made-to-order item	View & order
Rendamax relay base Finder time relay old no.: ERV011	8551318 Mfr. no. 64211314	€67.99	Made-to-order item	View & order
Rendamax isolating transformer VE016 160VA old no.: ETS005	8551358 Mfr. no. 64211410	€393.07	Made-to-order item	View & order
Rendamax power transformer for KM628 220/24-15-11V old no.: ETR055	8551357 Mfr. no. 64202438	€248.35	Made-to-order item	View & order

Cables and wiring harnesses for the Elco (Rendamax) R300/305 (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	€219.19	Made-to-order item	View & order
Rendamax cable old no.: ESK160AS	8551329 Mfr. no. 64210209	€231.07	Made-to-order item	View & order
Rendamax cable old no.: RKF058AS	8551641 Mfr. no. 12084619	€275.35	Made-to-order item	View & order
Rendamax cable old no.: EVS455AS	8551391 Mfr. no. 64201514	€246.19	Made-to-order item	View & order
Rendamax cable old no.: EKB050	8551268 Mfr. no. 65108168	€100.39	Made-to-order item	View & order
Rendamax ignition cable old no.: ESB025	8551324 Mfr. no. 12067866	€100.39	Made-to-order item	View & order
Rendamax PC communication set old no.: EIO005AS	8551266 Mfr. no. 64200885	€1,045.39	Made-to-order item	View & order

Gasket sets for the Elco (Rendamax) R300/305 (1) all Elco (Rendamax) gasket sets →

Part	Item no. / mfr. no.	Price	Stock
Rendamax seal kit burner R505/R305 old no.: 505U2AS	8550805 Mfr. no. 65108039	€742.99	Made-to-order item	View & order

Gaskets and seals for the Elco (Rendamax) R300/305 (18) all Elco (Rendamax) gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Rendamax O-ring old no.: ARO030	8551072 Mfr. no. 64201315	€42.07	In stock	View & order
Rendamax gasket old no.: ARP555	8551128 Mfr. no. 65000483	€42.07	In stock	View & order
Rendamax gasket for e.g. R300/307 64202029	8552154 Mfr. no. 64202029	€101.47	Made-to-order item	View & order
Rendamax O-ring old no.: DLS020	8551207 Mfr. no. 64200919	€139.27	Made-to-order item	View & order
Rendamax O-ring old no.: ARO306	8551091 Mfr. no. 65108144	€50.71	Made-to-order item	View & order
Rendamax gasket old no.: ARP380	8551122 Mfr. no. 12067657	€55.03	Made-to-order item	View & order
Rendamax gasket old no.: ARP321	8551117 Mfr. no. 64200986	€52.87	Made-to-order item	View & order
Rendamax gasket old no.: ARP331	8551118 Mfr. no. 64200984	€52.87	Made-to-order item	View & order
Rendamax gasket old no.: 500W1AS	8550741 Mfr. no. 12037561	€335.83	Made-to-order item	View & order
Rendamax gasket old no.: DSN065	8551232 Mfr. no. 17017057	€53.95	Made-to-order item	View & order
Rendamax gasket for e.g. R300/307 64202030	8552155 Mfr. no. 64202030	€93.91	Made-to-order item	View & order
Rendamax gasket old no.: ARP400	8551124 Mfr. no. 64200982	€30.19	Made-to-order item	View & order
Rendamax gasket old no.: CRS015	8551166 Mfr. no. 11001558	€106.87	Made-to-order item	View & order
Rendamax gasket old no.: ARP271	8551113 Mfr. no. 64200325	€35.59	Made-to-order item	View & order
Rendamax O-ring old no.: 500WWAS	8552120 Mfr. no. 64201674	€347.71	Made-to-order item	View & order
Rendamax gasket old no.: 505R104	8550802 Mfr. no. 12037693	€196.51	Made-to-order item	View & order
Rendamax gasket old no.: ARP055AS	8551099 Mfr. no. 12016166	€115.51	Made-to-order item	View & order
Rendamax gasket old no.: 505M121	8550800 Mfr. no. 64201389	€187.87	In stock	View & order

Pipes, tubes and hoses for the Elco (Rendamax) R300/305 (12) all Elco (Rendamax) pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Rendamax flow pipe CH R505	8550796 Mfr. no. 64200393	€150.07	Made-to-order item	View & order
Rendamax flow piece old no.: GGU010BS	8551451 Mfr. no. 65000198	€1,626.43	Made-to-order item	View & order
Rendamax flow piece old no.: GGU010AS	8551450 Mfr. no. 64201530	€1,594.03	Made-to-order item	View & order
Rendamax immersion sleeve 1/2 old no.: RTP013	8551902 Mfr. no. 17006755	€105.79	Made-to-order item	View & order
Rendamax immersion sleeve 1/4 d7.2mm old no.: RTP065	8551903 Mfr. no. 4478694220	€94.99	Made-to-order item	View & order
Rendamax immersion sleeve 1/4 d8.5 mm old no.: RTP085	8551906 Mfr. no. 64200059	€120.91	Made-to-order item	View & order
Rendamax elbow 1/4 x 8 mm old no.: FKM190	8551417 Mfr. no. 64200854	€62.59	Made-to-order item	View & order
Rendamax elbow 1/8 x 8 mm old no.: FKM185	8551416 Mfr. no. 64200855	€62.59	Made-to-order item	View & order
Rendamax plastic hose old no.: DSN005	8551213 Mfr. no. 64280527	€71.23	Made-to-order item	View & order
Rendamax return pipe old no.: 505W1M1	8550809 Mfr. no. 64200387	€124.15	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU030CS	8551459 Mfr. no. 64201529	€1,517.35	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU030BS	8551458 Mfr. no. 64201527	€1,543.27	Made-to-order item	View & order

Casing and panels for the Elco (Rendamax) R300/305 (4) all Elco (Rendamax) casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Rendamax housing old no.: ROM026	8551775 Mfr. no. 64200087	€69.07	Made-to-order item	View & order
Rendamax top plate R305, R505 old no.: 505M1MBAS	8550801 Mfr. no. 65108037	€794.83	Made-to-order item	View & order
Rendamax radiation plate rear complete old no.: 505W1N1AS	8550810 Mfr. no. 65108042	€198.67	Made-to-order item	View & order
Rendamax radiation plate front complete old no.: 502W1P1AS	8550773 Mfr. no. 65108019	€206.23	Made-to-order item	View & order

Insulation for the Elco (Rendamax) R300/305 (1) all Elco (Rendamax) insulation →

Part	Item no. / mfr. no.	Price	Stock
Rendamax air damper insulation old no.: GIN070AS	8551495 Mfr. no. 64210700	€423.31	Made-to-order item	View & order

Fixing material for the Elco (Rendamax) R300/305 (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	€60.43	Made-to-order item	View & order

Other parts for the Elco (Rendamax) R300/305 (29)

Part	Item no. / mfr. no.	Price	Stock
Rendamax sight glass complete old no.: DBG010AS	8551175 Mfr. no. 12083849	€130.63	In stock	View & order
Rendamax on/off switch old no.: ELS032AS	8551286 Mfr. no. 64200294	€45.31	In stock	View & order
Rendamax spark plug cap ignition/ionisation electrode old no.: EVD003	8551373 Mfr. no. 64210410	€37.75	In stock	View & order
Rendamax spark plug cap ionisation electrode old no.: EVD001HS	8552107 Mfr. no. 64210409	€25.87	In stock	View & order
Rendamax silicone sealant high temperature (red) old no.: VKS005	8551986 Mfr. no. 64200009	€88.51	In stock	View & order
Rendamax aluminium tape 75 x 50000 old no.: DTA005	8551238 Mfr. no. 65108158	€94.99	Made-to-order item	View & order
Rendamax BM8 weather-compensated controller old no.: RBM006	8551590 Mfr. no. 64200788	€424.39	Made-to-order item	View & order
Rendamax auxiliary relay conversion kit old no.: ERH086AS	8551303 Mfr. no. 65000185	€120.91	Made-to-order item	View & order
Rendamax boiler foot adjustable R600 old no.: GIL100AS	8551490 Mfr. no. 64200820	€55.03	Made-to-order item	View & order
Rendamax sight glass complete old no.: DBG010	8551174 Mfr. no. 64200929	€134.95	Made-to-order item	View & order
Rendamax KKM8 cascade controller old no.: RBM011AS	8551591 Mfr. no. 65000251	€835.87	Made-to-order item	View & order
Rendamax test nipple old no.: RKD001	8551640 Mfr. no. 64211101	€16.15	In stock	View & order
Rendamax bypass piece R301-R507 old no.: 500WRE1AS	8550742 Mfr. no. 65107997	€1,869.43	Made-to-order item	View & order
Rendamax bypass piece l.b. R300/R500 old no.: 500BRC1AS	8550740 Mfr. no. 65107996	€2,246.35	Made-to-order item	View & order
Rendamax return piece old no.: GGU040AS	8551461 Mfr. no. 64201526	€1,117.75	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO301	8551089 Mfr. no. 64200374	€91.75	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO296	8551088 Mfr. no. 64200367	€196.51	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO286	8551086 Mfr. no. 64200389	€132.79	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO291	8551087 Mfr. no. 64200385	€69.07	Made-to-order item	View & order
Rendamax room sensor RFB old no.: EBA055	8551259 Mfr. no. 64200889	€98.23	Made-to-order item	View & order
Rendamax choke coil old no.: ETN025	8551354 Mfr. no. 12016276	€136.03	Made-to-order item	View & order
Rendamax snap fastener R6605 old no.: BSS090	8551144 Mfr. no. 64200502	€48.55	Made-to-order item	View & order
Rendamax time relay Finder 85.02.8.240 old no.: ERT027	8551311 Mfr. no. 17008295	€151.15	Made-to-order item	View & order
Rendamax Gluecon 1000 heat-resistant adhesive 64210202 old no.	8551987 Mfr. no. 64210202	€72.31	Made-to-order item	View & order
Rendamax Omnivisc 1050 64210199 old no.: VLS003	8551988 Mfr. no. 64210199	€116.59	Made-to-order item	View & order
Rendamax Permabond A1312 64200600 old no.: VLS050	8551990 Mfr. no. 64200600	€141.43	In stock	View & order
Rendamax Permabond LH197 65000351 old no.: VLS053	8551991 Mfr. no. 65000351	€118.75	Made-to-order item	View & order
Rendamax Permabond MH052 65000353 old no.: VLS059	8551993 Mfr. no. 65000353	€164.11	Made-to-order item	View & order
Rendamax Permabond old no.: VLS058	8551992 Mfr. no. 65000352	€152.23	Made-to-order item	View & order

Fault code on your Elco (Rendamax) R300/305? 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) R300/305?

The catalogue lists 108 original parts for the Elco (Rendamax) R300/305, 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) R300/305 cost?

The fans for this model cost €1,490.38 incl. VAT. Check the table "Fans" above for the right part number.

Are the parts for the Elco (Rendamax) R300/305 in stock?

22 of the 108 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) R300/305?

Search for the part by part number or use the parts list of the Elco (Rendamax) R300/305.

Are these original Elco (Rendamax) parts?

Yes. All 108 parts in this list are original manufacturer parts for the Elco (Rendamax) R300/305, delivered with the correct part number.

How much do parts for the Elco (Rendamax) R300/305 cost?

Parts for the Elco (Rendamax) R300/305 range from €8.47 to €20,419.32 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.