Elco (Rendamax) R500/504 spare parts

In brief

Instalpunt supplies 99 original parts for the Elco (Rendamax) R500/504, including temperature sensors and NTC sensors, flow sensors and flow switches, gas valves and gas control. Order online.

99Spare parts
13In stock
€7.84From
18Types

Looking for parts for the Elco (Rendamax) R500/504 (boiler)? Below are all 99 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) R500/504

Part	From	Delivery
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.

Temperature sensors and NTC sensors 3
Flow sensors and flow switches 2
Gas valves and gas control 2
PCBs and controls 3
Burner control units 8
Ignition and ionisation 2
Siphons and condensate drains 1
Thermostats and controls 1
Burners 2
Heating elements 1
Pressure gauges 3
Electrical parts 7
Cables and wiring harnesses 4
Gasket sets 1
Gaskets and seals 10
Pipes, tubes and hoses 13
Casing and panels 5
Fixing material 1
Other parts 30

Temperature sensors and NTC sensors for the Elco (Rendamax) R500/504 (3) all Elco (Rendamax) temperature sensors and NTC sensors →

Part	Item no. / mfr. no.	Price	Stock
Rendamax outdoor sensor 1k old no.: RTV015	8551919 Mfr. no. 64921170	€72.95	In stock	View & order
Rendamax sensor 1k old no.: RTV080	8551927 Mfr. no. 64921173	€91.95	Made-to-order item	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) R500/504 (2)

Part	Item no. / mfr. no.	Price	Stock
Elco Caleffi flow switch (Rendamax)	8551892 Mfr. no. 64210206-01	€281.95	In stock	View & order
Rendamax flow switch old no.: RSS008	8551893 Mfr. no. 64201474	€966.95	Made-to-order item	View & order

Gas valves and gas control for the Elco (Rendamax) R500/504 (2) all Elco (Rendamax) gas valves and gas control →

Part	Item no. / mfr. no.	Price	Stock
Rendamax gas valve old no.: RKH021CS	8551652 Mfr. no. 65000258	€761.95	Made-to-order item	View & order
Rendamax venturi VMU150A1003 old no.: RKV002CS	8551702 Mfr. no. 65000267	€338.95	Made-to-order item	View & order

PCBs and controls for the Elco (Rendamax) R500/504 (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) R500/504 (8) 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 IP/CVI type 3/7 LPG old no.: RBA058US	8551580 Mfr. no. 65000245-01	€1,061.95	Made-to-order item	View & order
Rendamax burner control unit KM628 IP/KS type 3/7 old no.: RBA058DS	8551567 Mfr. no. 65000229-01	€1,011.95	Made-to-order item	View & order
Rendamax burner control unit KM628 ZW/CVI type 3/7 old no.: RBA058PS	8551575 Mfr. no. 65000240-01	€1,061.95	Made-to-order item	View & order
Rendamax burner control unit KM628 ZW/CVI type 3/7 LPG old no.: RBA058VS	8551581 Mfr. no. 65000246-01	€1,061.95	Made-to-order item	View & order
Rendamax burner control unit KM628 ZW/KS type 3/7 old no.: RBA058OS	8551574 Mfr. no. 65000239-01	€1,061.95	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) R500/504 (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) R500/504 (1) all Elco (Rendamax) siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Rendamax condensate tray R304, R504 old no.: 504R1A1AS	8550788 Mfr. no. 65108028	€1,283.95	Made-to-order item	View & order

Thermostats and controls for the Elco (Rendamax) R500/504 (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) R500/504 (2) all Elco (Rendamax) burners →

Part	Item no. / mfr. no.	Price	Stock
Rendamax burner/heat exchanger old no.: 304U1AS	8550520 Mfr. no. 64201492	€13,849.95	Made-to-order item	View & order
Rendamax burner/heat exchanger old no.: 304URAS	8550521 Mfr. no. 64201501	€22,334.95	Made-to-order item	View & order

Heating elements for the Elco (Rendamax) R500/504 (1)

Part	Item no. / mfr. no.	Price	Stock
Rendamax resistor old no.: ELW060	8551287 Mfr. no. 12067833	€55.95	Made-to-order item	View & order

Pressure gauges for the Elco (Rendamax) R500/504 (3)

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 0-10 old no.: ROM037	8551778 Mfr. no. 65000459	€254.95	Made-to-order item	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) R500/504 (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 base Finder time relay old no.: ERV011	8551318 Mfr. no. 64211314	€62.95	Made-to-order item	View & order
Rendamax relay base Schrack old no.: ERV086	8551319 Mfr. no. 65108188	€61.95	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) R500/504 (4) all Elco (Rendamax) cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Rendamax ionisation cable old no.: EVD001AS	8551365 Mfr. no. 64200866	€202.95	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

Gasket sets for the Elco (Rendamax) R500/504 (1) all Elco (Rendamax) gasket sets →

Part	Item no. / mfr. no.	Price	Stock
Rendamax seal kit R304, R504 old no.: 504U2AS	8550790 Mfr. no. 65108029	€582.95	Made-to-order item	View & order

Gaskets and seals for the Elco (Rendamax) R500/504 (10) 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 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.: 504R104	8550787 Mfr. no. 12037682	€101.95	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 old no.: 504M121	8550785 Mfr. no. 12037605	€103.95	Made-to-order item	View & order
Rendamax gasket old no.: ARP271	8551113 Mfr. no. 64200325	€32.95	Made-to-order item	View & order

Pipes, tubes and hoses for the Elco (Rendamax) R500/504 (13) all Elco (Rendamax) pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Rendamax flow pipe CH R301-R304, R501-R504	8550743 Mfr. no. 65107998	€126.95	Made-to-order item	View & order
Rendamax flow piece old no.: GGU005BS	8551447 Mfr. no. 65108216	€1,224.95	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 d7.2 mm old no.: RTP066	8551904 Mfr. no. 64200061	€365.95	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.: 501W1M1	8550756 Mfr. no. 64200386	€108.95	Made-to-order item	View & order
Rendamax heat distribution piece IP centre 2 old no.: 501WRB1AS	8550760 Mfr. no. 65108010	€964.95	Made-to-order item	View & order
Rendamax heat distribution piece IP R301-R304, R501-R504 old no.: 501BRA1AS	8550744 Mfr. no. 65107999	€658.95	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU025GS	8551457 Mfr. no. 65000203	€1,030.95	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU015AS	8551452 Mfr. no. 65000199	€791.95	Made-to-order item	View & order
Rendamax heat distribution piece old no.: GGU025DS	8551455 Mfr. no. 65000201	€1,121.95	Made-to-order item	View & order
Rendamax flow piece IP R301-R304, R501-R504 old no.: 501BZB1AS	8550746 Mfr. no. 65108001	€2,439.95	Made-to-order item	View & order

Casing and panels for the Elco (Rendamax) R500/504 (5) all Elco (Rendamax) casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Rendamax anti-vibration foot condensate tray old no.: GIL100BS	8551491 Mfr. no. 65000206	€132.95	Made-to-order item	View & order
Rendamax housing old no.: ROM026	8551775 Mfr. no. 64200087	€63.95	Made-to-order item	View & order
Rendamax top plate R304, R504 old no.: 504M1MBAS	8550786 Mfr. no. 65108027	€305.95	Made-to-order item	View & order
Rendamax radiation plate rear complete old no.: 504W1N1AS	8550794 Mfr. no. 65108032	€200.95	Made-to-order item	View & order
Rendamax radiation plate front complete old no.: 504W1P1AS	8550795 Mfr. no. 65108033	€393.95	Made-to-order item	View & order

Fixing material for the Elco (Rendamax) R500/504 (1) all Elco (Rendamax) fixing material →

Part	Item no. / mfr. no.	Price	Stock
Rendamax fixing clip for ERH086 old no.: ERV087	8551320 Mfr. no. 65108189	€55.95	Made-to-order item	View & order

Other parts for the Elco (Rendamax) R500/504 (30)

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 spark plug cap ignition/ionisation electrode old no.: EVD003	8551373 Mfr. no. 64210410	€34.95	In stock	View & order
Rendamax silicone sealant high temperature (red) old no.: VKS005	8551986 Mfr. no. 64200009	€81.95	In stock	View & order
Rendamax wire end ferrule splice dekave 34138 old no.: EVP040AS	8551381 Mfr. no. 17016292	€103.95	Made-to-order item	View & order
Rendamax aluminium tape 75 x 50000 old no.: DTA005	8551238 Mfr. no. 65108158	€87.95	Made-to-order item	View & order
Rendamax radio clock old no.: RUF002	8551932 Mfr. no. 65000319	€1,329.95	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 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, R501 old no.: 501WUA1AS	8550761 Mfr. no. 65108011	€814.95	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 IP R301, R501 old no.: 501WZD1AS	8550762 Mfr. no. 65108012	€865.95	Made-to-order item	View & order
Rendamax return piece old no.: GGU035AS	8551460 Mfr. no. 65000204	€1,125.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO276	8551084 Mfr. no. 64200366	€68.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO266	8551082 Mfr. no. 64200388	€95.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO271	8551083 Mfr. no. 64200382	€69.95	Made-to-order item	View & order
Rendamax round cord AP300 old no.: ARO281	8551085 Mfr. no. 64200373	€65.95	Made-to-order item	View & order
Rendamax silicone sealant old no.: VKS001	8551985 Mfr. no. 64210200	€54.95	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 time relay Finder 85.02.8.240 old no.: ERT027	8551311 Mfr. no. 17008295	€139.95	Made-to-order item	View & order
Rendamax cable tie 280 x 5 old no.: EBB001AS	8551263 Mfr. no. 65108166	€48.95	Made-to-order item	View & order
Rendamax burner control unit KM628 IP/CVI type 3/7	8551346 Mfr. no. 6500789500	€1,011.95	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 old no.: VLS058	8551992 Mfr. no. 65000352	€140.95	Made-to-order item	View & order

Fault code on your Elco (Rendamax) R500/504? 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.

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Frequently asked questions

Which parts are available for the Elco (Rendamax) R500/504?

The catalogue lists 99 original parts for the Elco (Rendamax) R500/504, including temperature sensors and NTC sensors, flow sensors and flow switches, gas valves and gas control, PCBs and controls. All parts are listed above, grouped by type, with part number and price.

How much does a temperature sensor for the Elco (Rendamax) R500/504 cost?

The temperature sensors and NTC sensors for this model cost between €69.26 and €74.49 incl. VAT. Check the table "Temperature sensors and NTC sensors" above for the right part number.

Are the parts for the Elco (Rendamax) R500/504 in stock?

13 of the 99 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) R500/504?

Search for the part by part number or use the parts list of the Elco (Rendamax) R500/504.

Are these original Elco (Rendamax) parts?

Yes. All 99 parts in this list are original manufacturer parts for the Elco (Rendamax) R500/504, supplied through the official technical wholesale channel and with the correct part number.

How much do parts for the Elco (Rendamax) R500/504 cost?

Parts for the Elco (Rendamax) R500/504 range from €7.84 to €20,839.54 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.