Installation and servicing instructions [PDF] (16 pages)
- Updated: 04.09.2026
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Flexiflame 140
OPEN FLUE BOILER
GAS SAFETY (INSTALLATION
AND USE) REGULATIONS
It is the law that all gas appliances are installed by a competant person
in accordance with the above regulations
(For use on natural gas only. G20)
G.C. No 41 980 64
FROM SERIAL N”
Installation and Servicing
Instructions
(Leave these instructions with the user)
CONTENTS
Health and Safety Information
Page No
1
1.
INTRODUCTION
1.
General description, Special features, Guarantee
1.1
Dimensions
2.
TECHNICAL
DATA
2.1
Input, Output, Burner setting pressure, Gas rate
2.2
Clearances
2.3
Flue connection
2.4
Gas connection
2.5
Water connection
2.6
Water flow rates and static head
2.7
Electrical connections
2.8
Weight
2.9
Water capacity
2.10 Injector sizes
2.11 Piezo ignitor
2.12 Electrode
2.13 Gas pressure test point
2.14 Boiler thermostat
2.15 Thermocouple and thermoelectric valve
3.
INSTALLATION
REQUIREMENTS
3.1
General information
3.2
Location
3.3
Gas supply
3.4
Flueing
3.5
Air supply
3.5. I Room or internal space air supply
3.5.2 Cupboard or compartment air supply
35.3 Effect of extractor fan
3.6
Water circulation systems
3.7
Electrical supply
4.
INSTALLATION
OF BOILER
4.1
General
4.2
Control schemes Figs. 1, 2, 3,4,5,6,7
4.3
Boiler packaging
4.4
Mounting the boiler
4.5
Water connections
4.6
Gas connections and pipe sizes
4.7
Electrical connections
5.
WATER CIRCULATING
SYSTEM
5.1
General
5.1. I Strainers
5.2
Control schemes
5.3
Isolating valves
5.3.1 Electrical components Fig. 8, Fig. 9, Fig. 10
5.3.2 Pump positions Fig. 11, Fig. 12, Fig. 13, Fig. 14
5.3.3 Air separator Fig. 15
5.4
Circulating pump
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
5.5
Inhibitors
5.6
Automatic air separator
5.7
Open systems
5.7.1 Cold feeds and open vents
5.7.2 Hot water storage cylinder
5.7.3 Feed and expansion tank
5.8
Sealed system Fig. 15A
5.8.1 Safety valve
5.8.2 Pressure gauge
5.8.3 Hot water storage cylinder
5.8.4 Make-up system
5.8.5 Mains connection
5.8.6 Filling point
5.8.7 Pipework
6.
COMMISSIONING
AND TESTING
6.1
Electrical installation
6.2
Gas installation
6.3
Water circulation system
6.3.1 Open system
6.3.2 Sealed system Fig. 16
6.4
Lighting the boiler
6.5
Gas rate adjustment
6.6
Flushing
6.7
Fitting the casting Fig. 18, Fig. 19, Fig. 20 (Page 9)
6.8
Thermostat adjustment
6.9
To drain boiler
6.10 Users instructions
7.
ROUTINE
SERVICING
General
7.1
Remove casing
7.2
Annual service
7.2.1 To clean the burner Fig. 2 1
7.2.2 To clean the heating body
7.2.3 To clean the pilot assembly
7.2.4 To remove the gas section Fig. 22 (Page 10)
7.2.5 To clean and grease bearing plate spindle Fig. 23
7.2.6 To clean thermocouple and electrode Fig. 24
7.3
General service
7.3.1 To clean burner, heating body, pilot assembly and thermocouple
7.3.2 To remove electrical control module
7.3.3 To replace diahragm
7.3.4 To clean gas valve
8.
8.1
8.2
8.3
8.4
8.5
8.6
8.7
REPLACING
COMPONANTS
To replace thermoelectric valve
To replace overheat thermostat
To replace piezo unit
To replace pump
To replace pump and volute
To replace heat exchanger
To replace boiler thermostat
7
7
7
7
7
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
10
10
10
11
11
12
13
9.
FAULT FINDING
10.
SHORT SPARE PART LIST
i i
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