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Connection tables

Here you will find a number of connection tables, if your brand or type of central heating boiler is not listed, please feel free to contact us.

atag

Type	On off		Round		Opentherm
A-series (all begin Apr. 2009)	And	3 in 4	N.V.T.		N.V.T.
A-serie Z-ready (vanaf begin apr. 2009)	And	3 in 4	N.V.T.		And	1 in 2
E-series (until early Apr. 2009)	And	22 in 23	And, 1)	22 in 23	N.V.T.
E-series Z-ready (from early Apr. 2009)	And	3 in 4	N.V.T.		N.V.T.
E-serie Z-ready (vanaf febr. 2013)	And	3 in 4	N.V.T.		And	1 in 2
Q-serie: Q/Q-CC/Q-Solar	And	22 in 23	And, 1)	22 in 23	N.V.T.
Enigma E-SHR	And	22 in 23	And, 1)	22 in 23	N.V.T.
Enigma Comfort E-SHR	And	22 in 23	And, 1)	22 in 23	N.V.T.
Enigma Standard E-SHR	And	2 in 3	And 3)	2 in 3	N.V.T.
Perfect II PF-SHR	And	2 in 3	And 3)	2 in 3	N.V.T.
Perfect Intelligence PF-SHR	And	22 in 23	And, 1)	22 in 23	N.V.T.
Blue Angel II S-HR	And	22 in 23	And, 1)	22 in 23	N.V.T.
HR39T/27T	And	1 in 2	And	1 in 2	N.V.T.
VR18T/30T/48T	And	1 in 2	And	1 in 2	N.V.T.
BE-series: CZA / CMA / 350, 351, 352, 650, 651, 652,952	And	1 in 2	And	1 in 2	N.V.T.
50-series	And	1 in 2	And	1 in 2	N.V.T.
HR Solar Gas Combi HR -ZGC	And	22 in 23	And 3)	22 in 23	N.V.T.
SHR Solar gas Combi II SHR -ZGC	And	22 in 23	And, 1)	22 in 23	N.V.T.
XL-serie	And	7 in 8	N.V.T.		And	7 in 8

(1) Resistance cable between terminals 23 and 27.

(3) Resistance cable between terminals 22 and 27.

Intergas

Type	On off		Round		Opentherm
Kombi Kompakt HRE 24/18, 28/24, 36/30 (RF2) (1)	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
Kombi Kompakt HR 22, 28, 28/24, 36/30	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
Compact Solo HRE 12, 18, 24 and 30	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
Compact Solo HR 12, 22 and 28	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
Compact Tap HR	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
Prestige CW 5/6	And	6 and 7 (ct)	And	6 and 7 (ct)	And	11 in 12
HR/HRW 220/250/280	And	6 and 7 (ct)	And	6 and 7 (ct)	N.V.T.
HR / HRW Comfort Line 250/280	And	6 and 7 (ct)	And	6 and 7 (ct)	N.V.T.
H22 Low NOx-ps VRS, (W)/VRM (W)/VRT (W)	And	6 and 7 (ct)	And	6 and 7 (ct)	N.V.T.
G22E Low NOx-ps E /VR /VRT VR-Tronic	And	6 and 7 (ct)	And	6 and 7 (ct)	N.V.T.
G32/42 VR (W)/VR-Tronic	And	6 and 7 (ct)	N.V.T.		N.V.T.

Itho Daalderop

Type	On off		Round		Opentherm
Aqua-Max	And	1 in 2	And	1 in 2	And	1 in 2
Climax	And	5 in 6	And	5 in 6	And	7 in 8
Kli-Max 2	And	3 in 4	And	3 in 4	And	1 in 2
HR Gas combi series	And	K1 (2x) (1)	And	K1 (2x) (1)	And	K3 (2x)
Multisolar series	And	K1 (2x) (1)	And	K1 (2x) (1)	And	K3 (2x)
CombiFort	And	K1 (2x) (1)	And	K1 (2x) (1)	And	K3 (2x)
CombiFort 2nd room thermostat	And	K2 (2x) (1)	N.V.T.		N.V.T.
CombiPact	And	K1 (2x) (1)	And	K1 (2x) (1)	And	K3 (2x)
CombiPact 2nd room thermostat	And	K2 (2x) (1)	N.V.T.		N.V.T.
Comfort Classic	And	K1 (2x) (1)	And	K1 (2x) (1)	And	K3 (2x)
Comfort Classic 2nd room thermostat	And	K2 (2x) (1)	N.V.T.		N.V.T.
CombinAir- zone 1 (LT)	And	K1 (2x) (1)	And	K1 (2x) (1)	N.V.T.
CombinAir- zone 2 (HT)	And	K2 (2x) 1)			N.V.T.
HP Cube - zone 1 (LT)	And	divider 2 + 3	N.V.T.		And	Via Base Cube
HP Cube - see Base Cube 2nd thermostat	N.V.T.		N.V.T.		N.V.T.
HP Cool Cube - zone 1 LT	And	divider 2 + 3	N.V.T.		And	Via Base Cube
HP Cool Cube - see Base Cube 2nd thermostat	N.V.T.		N.V.T.		N.V.T.
Basic Cube (until September 2011)	And	Contact 1 + 2	N.V.T.		And	Contact 3 + 4
Basic Cube (Duo)	And	Contact 3a + 3b	And	Contact 3a + 3b	And	Contact 2a + 2b
Basic Cube (Duo) 2nd room thermostat	And	Contact 4a + 4b	N.V.T.		N.V.T.

(1) Room thermostat connection.

Nefit

Type	On off		Opentherm		Nefit Easy
TrendLine (All Versions)	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
TopLine I / II EN 25/30/45	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
TopLine I / II HR 70/100	And	5 and 6 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
TopLine Single I / II	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
TopLine Compact I/II HRC 25/CW4 30/CW5	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
TopLine AquaPower I / II (Plus) HRC	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
ProLine HRC24/CW3 and HRC24/CW4	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
ProLine NxT HRC 24/CW3, 24/CW4	And	1 and 2 green	And	Thermostat on orange terminal block	And	via nefit connect (2)

Central heating boilers no longer in production
Ecomline Excellent HR(C)	And	1 in 2	N.V.T.		And	via nefit connect (2)
Ecomline Classic HR(C)	And	1 in 2	N.V.T.		And	via nefit connect (2)
SmartLine Basic HR(C) 24/CW3/CW4	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
Turbo HR(C)	And	1 in 2	N.V.T.		N.V.T.
Ecomline VRC 24V(S)	And	1 in 2	N.V.T.		N.V.T.
HRC23VT	And	1 in 2	N.V.T.		N.V.T.
Ecomline Economy HR(C) 23V/28V	And	1 in 2	N.V.T.		And	via nefit connect (2)
Economy HR(C)	And	1 in 2	N.V.T.		And	via nefit connect (2)
VR FC 2520/3030 V/S (C)	And	5 in 6	N.V.T.		N.V.T.
VR FC 2510 V/S (C)	And	Knows	N.V.T.		N.V.T.
Ecomline Elite HRC 24/CW4, 30/CW5	And	5 and 6 green	N.V.T.		N.V.T.
SmartLine HR11/24, HRC 24/CW4/CW3	And	1 and 2 green	And	Via EMS-OT converter (1) (orange connection)	And	Thermostat on orange terminal block
Economy VR(C)	And	1 in 2	N.V.T.		And	via nefit connect (2)

(1) EMS-OT converter available here

(2) Nefit connect available here

Remeha

Type	On off		Round		Opentherm
Tzerra / Tzerra More	And	On / off-OT	And	On / off-OT	And	On / off-OT
Soar	And	3 in 4	And	3 in 4	And	3 in 4
Aquanta	And	7 in 8	And	7 in 8	And	7 in 8
Hot	And	On / Off - OT	And	On / Off - OT	And	On / Off - OT
Thursday 25/28/30/35 Combi	And	3 in 4	And	3 in 4 (1)	And	1 in 2
Fifth 25/30/45/65/85 Only	And	3 in 4	And	3 in 4 (1)	And	1 in 2
Thursday Pro	And	On / Off - OT	And	On / Off - OT	And	On / Off - OT
W21 Combi / Solo	N.V.T.		N.V.T.		N.V.T.
ECO	And	3 in 4	And	3 in 4	And	1 in 2
W28 Combi / Solo	N.V.T.		N.V.T.		N.V.T.
ECO	And	3 in 4	And	3 in 4	And	1 in 2
W40 to W60 Eco	And	1 in 2	And	1 in 2	N.V.T.
W40-m to W60-m	N.V.T.		N.V.T.		N.V.T.
Eco	And	1 in 2	And	1 in 2	And	13 in 14
Select (PLUS)	And	2 in 3	And	2 in 3 (2)	And	5 in 6
W23 Combi	And	1 in 2	N.V.T.		N.V.T.
W23 Only	And	20 in 21	N.V.T.		N.V.T.
Micron 1 in 2	And	A en B	N.V.T.		N.V.T.
Micron Combi	And	2 in 3 of A and B	N.V.T.		N.V.T.
Optimum Solo	And	20 in 21	N.V.T.		N.V.T.
Optimum Combi	And	20 in 21	N.V.T.		N.V.T.
Gas 1DXR	And	10 in 11	N.V.T.		N.V.T.
Gas 1DXR-E	And	9 in 10	N.V.T.		N.V.T.

(1) 220 Ω/7W resistor between terminals 3 and 11.

(2) 220 Ω/7W resistor between terminals 1 and 4.

Valiant

Type	On off		Round		Opentherm
ecoTEC plus VHR 20-24/25-30/30-34	And	RT 24	And	RT 24	And	OT and ground on supplied OpenTherm module VR33
ecoTEC classic VHR CW 3/5, 3/5 EXP, 4/5, 4/5 EXP, 5/5	And	RT 24	And	RT 24	And	Only with optional Opentherm module VR33 art. no 0020017859
ecoTEC pro VHR CW 3/5, 3/5 EXP, 4/5, 4/5 EXP	And	RT 24	And	RT 24	And	Only with optional Opentherm module VR33 art. no 0020017859 (1)
hrPRO serie VHR CW 3/3, 4/3, 4/3 EXP	And	3 in 4	And	3 in 4	And	Only with optional Opentherm module VR33 art. no 0020017859
hrSOLIDE (2000 - 2006) VHR 10S, 18S, 24S, 18-22C en 24-28 C	And	3 in 4	And	3 in 4 (2)	And	A en B (4)
hrSOLIDE (2006 onwards) VHR 18-22/3, CVHR 24-28/3, 30-34/3, 34/3 IC	And	3 in 4	And	3 in 4	And	Only with optional Opentherm module VR33 art. no 0020017859 (1)
hrSOLIDEplus VHR 18-22/3-5, 24-28/3-5, 30-34/3-5, 34/3-5	And	3 in 4	And	3 in 4	And	OT and ground on supplied OpenTherm module VR33
hrEXCLUSIEF VHR 35 S, 35 C, 45 S, 65 S	And	3 in 4	And	3 in 4 (2)	N.V.T.
hrEXCLUSIEF (vanaf 2006) VHR 20/4 S, 25/4 S, 35/4 S, 30/4 C, 35/4 C, 45/4 S, 65/4 S	And	3 in 4	And	3 in 4	And	Only with optional Opentherm module VR33 art. no 0020017859 (1)
thermoCOMPACT (from 2008) VC 454/4, 255/4, VCW 254/4, 255/4	And	3 in 4	And	3 in 4	N.V.T.
thermoCOMPACT VC 254/3, 255/3, VCW 254/3, 255/3, CWK 245/3	And	3 in 4	And	3 in 4 (2)	N.V.T.
thermoCOMPACT HR VU 18 / 6E, 23 / 6E, VUW 18-22 / 6E, 23-28 / 6E	And	3 in 4 (3)	And	3 in 4 (2) (3)	N.V.T.
thermo COMPACT 2000/2 VC 254 XE, 255 E, VCW 254 XE, 255 E	And	3 in 4	And	3 in 4 (2)	N.V.T.
thermo COMPACT 2000 VC 254 XE, 255 E, VCW 254 XE, 255 E	And	3 in 4 (3)	And	3 in 4 (2)	N.V.T.
thermo COMPACT VC/VCW 180 (X) E t/m 282 E, 24-12, 24-12 SO 28, 24-12 E	And	3 in 4 (3)	And	3 in 4 (2) (3)	N.V.T.

(1) Opentherm module VR33 available here

(2) Resistance between 4 and 5: 220 Ohm/5W

(3) Pump function in position 1

(4) When used as OpenTherm thermostat: convert D20 function to OpenTherm