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WarmFlow Utility Combi UC70HE User Manual

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Boiler Manual
Incorporating: User Instructions
Installation Instructions
Service Instructions
Guarantee Terms & Conditions
High Efficiency
Condensing Boilers
For use with Kerosene only
Models covered by this manual:
B-Series
Boilerhouse B70HE B90HE B120HE
U-Series
Utility U70HE U90HE U120HE U150HE
Utility Pumped UP70HE UP90HE UP120HE UP150HE
Utility System US70HE US90HE US120HE
Utility Combi UC70HE UC90HE UC120HE
K-Series
Kabin Pak K70HE K90HE K120HE K150HE
Kabin Pak Pumped KP70HE KP90HE KP120HE KP150HE
Kabin Pak System KS70HE KS90HE KS120HE
Kabin Pak Combi KC70HE KC90HE KC120 HE
LEAVE THIS MANUAL WITH THE END USER
Cert. no. FM29884

Table of Contents

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WarmFlow Utility Combi UC70HE Specifications

General IconGeneral
TypeCombi
Efficiency RatingA
Weight32 kg
Max. working pressure3 bar
Fuel TypeNatural Gas
MountingWall-mounted
DHW Flow Rate9.9 l/min
Flow Rate9.9 l/min
Flow rate at 35°C rise9.9 l/min

Summary

User Instructions

Dual Thermostat

Controls radiator temperature via boiler thermostat.

High Limit Thermostat Reset

Procedure to reset the high limit thermostat if it trips.

Burner Lockout

Explains burner lockout and reset procedure.

System Pressure – System & Combi Boilers

Guidelines for maintaining system pressure in boilers.

Filling Loop

Instructions for topping up system pressure using the filling loop.

Combi Control Panel

Details about the combi control panel and its functions.

Condensing Boiler Installation Requirements

Before Fitting a Combi Boiler The Installer Must Check

General Information

Introduction and General Requirements

Overview of boiler features, compliance, and installation regulations.

Combi General Requirements

Specific requirements for combi boiler operation and features.

Baffle Positioning

Instructions for correct baffle placement for optimal efficiency.

Boiler Components

Identification of key internal and external components across different boiler series.

Technical Details

Combi Sequence of Operation Flow Chart

Flowchart illustrating the combi boiler's operational sequence.

Boiler Dimensions

Provides dimensional data for various boiler models across different series.

Condensate Disposal

Guidelines and methods for safe and compliant disposal of boiler condensate.

Technical Specifications

Detailed technical data for various boiler models including output, burner, and settings.

Electricity Supply & Wiring Details

Thermostat and Burner Control Box

Details on Dual-Safe thermostat and RDB burner control box wiring.

Combi Wiring and Programmer Installation

Wiring diagrams, schematics, and installation guides for combi boilers and programmers.

Optional Programmer for Non-Combi Models

Wiring and installation for optional PC1 programmers on non-combi boilers.

Remote Timer System Wiring

Wiring diagrams for Honeywell 'Y' Plan and 'S' Plan remote timers.

Oil Supply

Oil Tank and Supply Systems

Requirements for oil tanks and diagrams for one-pipe, two-pipe, de-aerator, and lift systems.

Bio Fuel Usage Guidelines

Instructions for using bio fuel, including tank preparation, filtration, and maintenance.

Flues

Flue Options and Guidelines

Lists available flue kits, conventional flue guidelines, and fire safety for plastic flues.

Flue Kit Installation

Instructions for installing Low Level, High Level, and Vertical Balanced Flue Kits.

Flue Components and Calculations

Details of HE boiler flue components, length calculation, and plume management kits.

Flexible Flue Liner and Terminal Locations

Instructions for flexible flue liners and guidelines for flue terminal placement.

Air Supply for Combustion & Ventilation

Open Flue Boiler Air Supply

Air supply requirements for open flue boilers in rooms and compartments.

Balanced Flue Boiler Air Supply

Air supply requirements for balanced flue boilers in compartments.

Installation Requirements

General Installation Requirements

Requirements for hearth, service access, heating system, air vents, drain cock, frost protection, and pipework.

Sealed Systems

Guidelines for expansion vessels, system filling, pressure, relief valves, and low pressure switches.

Combi Domestic Hot Water Requirements

Details on mains water pressure, hardness, flow restrictors, and borehole supplies for combi DHW.

Burners

RDB Burner and Oil Pump Details

Overview of the RDB burner and oil pump, including system configurations.

Burner Adjustments and Start-Up

Procedures for electrode setting, start-up cycle, and air damper adjustment.

Commissioning & Servicing

Boiler Commissioning Procedures

Steps and requirements for proper boiler commissioning by qualified technicians.

Boiler Servicing Guidelines

Recommendations and requirements for annual boiler servicing by qualified technicians.

Burner Fault Finding

Riello RDB Burner Fault Diagnosis

Flowchart for troubleshooting common faults with the Riello RDB burner.

Combi Fault Finding

Central Heating Fault Finding

Flowchart for diagnosing and resolving central heating issues in combi boilers.

Domestic Hot Water Fault Finding

Flowchart for diagnosing and resolving domestic hot water issues in combi boilers.

Optional Boiler Mounted Digital Timer

Timer Installation and Setup

Instructions for installing the timer, setting initial configuration, time, and day.

Timer Operation Modes and Programmes

Guide to using built-in programmes, selecting modes, and setting programme periods.

Manual Timer Functions

Instructions for manual selection, manual hour functions, and cancelling overrides.

Spares

RDB Burner Spares

Lists spare parts for Riello RDB 2.2 and RDB 3.2 burners with part numbers.

Pipe Spares

Identifies various pipe spares with diagrams and part numbers for different boiler series.

Boiler Component Spares

A summary list of common boiler components and their part codes.

Your Guarantees, Terms & Conditions

Warmflow Guarantees

Details Warmflow's warranty periods and conditions for boilers and components.

Conditions of Guarantee

Outlines mandatory requirements for installation, commissioning, and servicing to maintain warranty validity.

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