Combi Boilers

Baxi 400 Combi 2

The Baxi 400 Combi 2 has a 5-year parts and labour warranty† is lightweight, contains brass hydraulics and a stainless-steel heat exchanger.

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Features and Benefits Product Literature Dimensions Technical Specification

Features and Benefits

Multiple outputs

Available in outputs of 24 and 30kW, natural gas or LPG

Safer and cleaner

Combined PrV with separate drain to facilitate a safer and quicker boiler drain down for repair

Time-saving

Colour-coded and removable wiring blocks to save time during installation

Temporary filling link

For central heating system pressure top up

Quicker installation

Compatible with internal fit telescopic flue for a safer and quicker one person fit installation from inside the property

Flexible

Optional stand off frame allows flexibility for hidden and neat pipework

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Product Literature

Installation and Service Manuals

User Guides

Specification Guides

Product Fiche

Energy Labels

Dimensions

A: Boiler width = 395mm

B: Boiler height = 700mm

C: Boiler depth = 285mm

D: Side clearance = 2.5mm

E: Upper clearance = 240mm

F: Lower clearance = 250mm

G: Front clearance = 5mm in operation (1000mm for servicing)

Technical Specification

Product Model	424	424 LPG	430	430 LPG
Product Code	7790614	7790616	7790615	7790617
Controls
Concealed User Controls	No	No	No	No
User Adjustable DHW temperature (Range - 35° to 60° (+- 5C))	Yes	Yes	Yes	Yes
User Adjustable CH temperature (Range - 25° to 80° (+- 5C))	Yes	Yes	Yes	Yes
Temperature / Fault Diagnosis Display	Yes	Yes	Yes	Yes
Gas
Natural gas	Yes	No	Yes	No
Propane LPG	No	Yes	No	Yes
Inlet supply pressure (natural gas) - mbar (nominal)	20	-	20	-
Maximum Gas Rate (G20) Qmax (m³ / hr)	2,61	-	3,17	-
Heat Input CH
kW (max) Gross (QnHs)	22,9	22,9	22,9	22,9
kW (min) Gross (QnHs)	5,4	5,4	6,7	6,7
Heat Output CH (non-condensing)
kW (Max) (Pn)	20	20	20	20
kW (Min) (Pn)	4,8	4,8	5,8	5,8
Heat Output CH (condensing)
kW (Max) (Pnc)	21,8	21,8	21,8	21,8
kW (Min) (Pnc)	5,2	5,2	6,3	6,3
Heat Input domestic hot water (DHW) (kW max gross (QnwHs))	27,4	27,4	33,3	33,3
Heat output domestic hot water (DHW) (kW max)	24	24	29,1	29,1
Water heating efficiency class	A	A	A	A
Electrical
Permanent live required	Yes	Yes	Yes	Yes
External fuse rating (Amps)	3	3	3	3
Pump overrun	Yes	Yes	Yes	Yes
Integral 'boiler only' frost thermostat	Yes	Yes	Yes	Yes
Hydraulic
Maximum DHW flow rate (Delta T @ 35'C rise) (l/min)	9,8	9,8	11,9	11,9
Minimum DHW flow rate required (l/min)	2	2	2	2
Minimum operating DHW pressure required (bar)	0,15	0,15	0,15	0,15
Integral expansion vessel - Size (litres)	7	7	7	7
Maximum capacity of the CH system (litres)	120	120	120	120
Integral automatic bypass	Yes	Yes	Yes	Yes
Weights
Installer Lift Weight (kg)	28	28	29	29

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Baxi Genuine Parts

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Product Training

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Error Codes for Baxi Boilers

If a boiler develops a problem, it will display an error code. We explain the most common error codes here.

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† Terms and conditions apply.