Boiler Manual - User Instructions - Installation Instructions - Service Instructions - Guarantee Terms & Conditions

Oct 22, 2026

Boiler Manual covering Agentis boiler models for use with kerosene, HVO and gas oil, including commissioning, servicing, and user guidance. The document explains required commissioning by a Warmflow technician, an OFTEC-registered technician, or an equivalent certified competent-person scheme, plus online or certificate-based registration. It states that failure to commission and register invalidates warranties, and that annual servicing is required to maintain reliability, fuel economy, and warranty validity. Contact details and model lists support owner and installer actions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages152

Reading Time6 h 23 min

AccessFree to download

Contents

1 User Instructions

1.1 Dual Thermostat – Non-Combination Boilers

1.2 Burner Lockout

1.3 Sealed Systems & System Pressure

1.4 Sealed Systems & System Pressure-System & Combination Boilers

1.5 Filling Loop

1.6 Corrosion Inhibitor

1.7 Circulating Pump Exercise

1.8 Control Panel – Combination Boilers

1.9 LCD Icon Descriptions

1.10 Home Screen

1.11 Setting the date and time

1.12 Setting CH flow temperature

1.13 Setting DHW flow temperature

1.14 Eco Mode

1.15 Frost Protection (Ice Protection function)

1.16 Circulating Pump and Diverter Valve

Boiler Manual Incorporating: User Instructions Installation Instructions Service Instructions Guarantee Terms & Conditions Agentis Boilers For use with Kerosene, HVO & Gas Oil Models covered by this manual: Agentis B-Series Boilerhouse Agentis I-Series Internal Internal Professional Internal Pumped & Pumped Professional Internal System & System Professional Internal Combi & Combi Professional Agentis E-Series External External Professional External Pumped & Pumped Professional External System & System Professional External Combi & Combi Professional B21 I21 I21PRO I21P/PRO I21S/PRO I21C/PRO E21 E21PRO E21P/PRO E21S/PRO E21C/PRO B26 I26 I26PRO I26P/PRO I26S/PRO I26C/PRO E26 E26PRO E26P/PRO E26S/PRO E26C/PRO B33 I33 I33PRO I33P/PRO I33S/PRO I33C/PRO E33 E33PRO E33P/PRO E33S/PRO E33C/PRO I44 I44PRO I44P E44 E44PRO E44P Internal Combi and External Combi models Patent GB1613466.0 , GB2552701, IE86968 LEAVE THIS MANUAL WITH THE END USER COMMISSIONING This appliance must be commissioned by a Warmflow technician, an OFTEC-registered technician or by an individual who is certified via an equivalent competent persons scheme applicable within the territory of installation. After commissioning, the Installer must ensure that the appliance is registered with the manufacturer. Registration of the appliance may be completed online, or by completing and returning the OFTEC boiler passport installation/commissioning certificate , or by completing and returning any equivalent installation/commissioning certificate applicable within the territory of installation. A copy of the installation/commissioning records must also be provided by the Installer to the Owner of the appliance. The Owner of the appliance must retain a copy of the installation/commissioning records provided. Failure to commission and register the appliance will invalidate all appliance warranties. SERVICING To ensure continued reliable operation , fuel economy and to validate the appliance warranty , the appliance must be serviced annually by a Warmflow technician, an OFTEC-registered technician or by an individual who is certified via an equivalent competent persons scheme applicable within the territory of installation. Failure to annually service the appliance will invalidate all appliance warranties. Annual service records must be retained by the Owner of the appliance. NI Customers Only Warmflow Engineering Service division (NI) provides an excellent back-up service, operating a team of OFTEC trained and registered engineers who can meet all the servicing, commissioning and breakdown requirements for your appliance. Tel: 028 9262 1515 Fax: 028 9262 2827 E-mail: [service@warmflow.co.uk](service@warmflow.co.uk) Web: [www.warmflow.co.uk](www.warmflow.co.uk) For Parts, Service Technical & Warranty Contact Great Britain & N. Ireland, Tel: 028 9262 1515 Republic of Ireland, Tel: 048 9262 1515 HEAD OFFICE GB OFFICE Lissue Industrial Estate , Moira Road, Unit 16 , Stadium Point Business Park , Lisburn, Co. Antrim, N. Ireland, BT28 2RF Shrewsbury , England, SY2 6NE Tel: (028) 9262 1515 Tel: (01952) 607 750 Fax: (028) 9262 0869 Fax: (01952) 603 983 E-mail: [sales@warmflow.co.uk](sales@warmflow.co.uk) E-mail: [salesgb@warmflow.co.uk](salesgb@warmflow.co.uk) [technical@warmflow.co.uk](technical@warmflow.co.uk) [technical@warmflow.co.uk](technical@warmflow.co.uk) [service@warmflow.co.uk](service@warmflow.co.uk) [service@warmflow.co.uk](service@warmflow.co.uk) CONTENTS 1 USER INSTRUCTIONS......................................................................................................... 8 1.1 Dual Thermostat – Non-Combination Boilers..............................................................................8 1.2 Burner Lockout ................................................................................................

FAQs

Who is allowed to commission the boiler appliance?

Commissioning must be done by a Warmflow technician, an OFTEC-registered technician, or a person certified via an equivalent competent persons scheme applicable within the installation territory.

How must the installer register the appliance after commissioning?

The installer must ensure the appliance is registered with the manufacturer, which can be completed online or by completing and returning the OFTEC boiler passport installation/commissioning certificate or an equivalent certificate for the installation territory.

What happens if commissioning and registration are not completed?

Failure to commission and register the appliance invalidates all appliance warranties.

Oct 22, 2026

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