O Potterson CF 20/35 User guide

CF 20/35 CF 35/50

Open Flue Gas Fired Boiler

THIS APPLIANCE IS FOR USE WITH NATURAL GAS ONLY.

Installation and Servicing Instructions

LEAVE THESE INSTRUCTIONS ADJACENT TO THE GAS METER.

Page 1

Page 2

FLAMINGO CF

20/35 G.C. No. 41 .605.59

35/50 G.C. No. 41 .605.60

IMPORTANT

This appliance must be installed by a competent person as stated in the Gas

Safety (Installation and Use) Regulations 1984.

Flamingo boilers are certified by BSI for safety. It is therefore important that no

external devices (e.g., flue dampers, economisers etc.) be directly connected

to theseappliances unless covered by these installation instructions or otherwi

se recommended in writing.

Any direct connection of a control device not approved by Potterton could inva

lidate the BSI certificate and the normal warranty.

LIST OF CONTENTS

Page No .

General

Accessories

Installation Data

Boiler Dimensions

Site Requirements

Technical Data

Installation Instructions

Commissioning

Servicing Instructions

Control Systems, Pipework and Wiring Guide

Supplied in

User’s Instructions

Literature Pack

Page 2

GENERAL - Page 3

Potterton Flamingo Open Flue boilers are automatically controlled, wall-

mounted appliances, using a cast iron heat exchanger and are available in tw

o outputs ranging from5.86-14.65 kW (20,000-

50,000 Btu/h). Refer to TECHNICAL DATA page 8. The boilers which are desi

gned to provide domestic hot water and/or central heating must beused on IN

DIRECT hot water systems only. The cast iron heat exchangers are suitable f

or use on sealed or open vented gravity hot water/pumped central heating sys

tems orfully pumped systems.

ACCESSORIES

The following range of Potterton system controls are also available and further

information will be provided upon request.

Electronic Programmer EP. 2000, E.P. 3000, E.P. 4000.

Programmable Electronic Thermostat PET 1

Thermostatic Radiator Valve PV456 and PH456

Electronic Cylinder Thermostat PTT 1

Electronic Room Thermostat PRT 1

Spring Return Zone Valve PMV2

Spring Return Diverter Valve PMV3

INSTALLATION DATA

The installation of the boiler must be in accordance with the latest relevant req

uirements of the Gas Safety (Installation and Use) Regulations 1984, local buil

ding regulations,current lEE Wiring Regulations and the bye-

laws of the local Water Undertaking.

Detailed recommendations are contained in the following British Standards an

d Codes of Practice.

BS. 6798 1987, BS. 5440 Part 1 1978

BS. 5440 Part 2 1976, BS. 5449 Part 1 1977

BS. 5546 1979, BS. 4814 1979, BS. 6891

BUILDING REGULATIONS

MODEL WATER BYE-LAWS

BRITISH GAS PUBLICATION DM2

GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1984

BUILDING STANDARDS (SCOTLAND) REGULATIONS.

Page 3

INSTALLATION DATA - Page 4

FIG. 1. BOILER DIMENSIONS (mm)

Page 4

INSTALLATION DATA - Page 5

FIG. 2. GENERAL ARRANGEMENT

Page 5

SITE REQUIREMENTS - Page 6

These boilers are not suitable for external installation.

This appliance must not be installed in bathrooms, shower rooms, bedrooms,

bed-

sitting rooms, garages or rooms where highly inflammable materials or vapour

s are likelyto be present. Fitting in toilets or cloakrooms is not recommended b

ut it is permitted, provided the ventilation and combustion air is taken direct fro

m outside.

Where the installation of the boiler will be in an unusual location special proce

dures may be necessary and BS. 6798 1987 gives detailed guidance on this a

spect.

Ensure that the gas supply pipe and meter are large enough for this appliance

and any others that may be run off the same meter. Reference should be ma

de to BS. 6891.

Boiler Mounting Surface

The boiler must be mounted on a flat wall, which may be of combustible mater

ial and must be sufficiently robust to take the weight of the boiler. The require

ments of the localauthorities and the Building Regulations must be adhered to.

IMPORTANT NOTICE: TIMBER FRAMED HOUSES

If the appliance is to be fitted in a timber framed building it should be fitted in a

ccordance with British Gas Publication.

‘Guide for Gas Installations in Timber Framed Housing’. If in doubt, advice mu

st be sought from the local Gas Region of British Gas.

Clearances Around The Boiler

The following minimum clearances must be maintained after installation for co

rrect operation and servicing of the boiler-

610 mm (2 ft) at the front of the boiler:-

5 mm (0.2 in) each side of the boiler

100 mm (4 in) at the top (measured from the top of boiler case)

100 mm (4 in) at the bottom of boiler

Additional clearances may be required to lift the boiler on to the wall.

COMBUSTION AIR AND VENTILATION REQUIREMENTS

General recommendations are given in BS. 5440 Part 2, and the followin

g notes are given as a general guide.

1. Ventilation of Compartments containing Gas Boilers

There should be two permanent air vents, one at low level and one at high lev

el, both communicating either directly with outside air or with a room or space

which is suitablyventilated. Each opening, whether left free or furnished with a

grille, must have a minimum effective area in accordance with TABLE 1.

TABLE 1

Level of Air Vent

Area for Air whethertaken from a Room orOutside.

cm²

CF 35/50

High

425

Low

425

CF 20/35

High

245

Low

245

There must be at least 300mm (12in) clearance between the grille on the front

of the boiler casing and any internal surface of the cupboard to allow for adeq

uate air foroperation of the draught diverter.

Further details for installation of a boiler within a compartment are given in BS.

6798 1987.

2. Ventilation of Rooms containing Gas Boilers

The ventilation of the room containing the boiler shall include air for combustio

n and draught diverter dilution. This applies also when the boiler is sited in a c

ompartment,unless the air vents are both direct to outside.

A permanent air vent shall be provided in an outside wall of the building at eith

er high or low level.

This opening may be:

a) Directly into the room or space containing the boiler or,

b) Via a duct through a wall or roof of the room,

(where such a method is considered British Gas should be consulted), or

Into an adjacent room or space which has an internal permanent air vent of th

e same size to the room containing the boiler. It is undesirable to ventilate via

a kitchen,bathroom or toilet.

The air vent should be sited as far as possible from any extract fan to avoid sh

ort circuiting. To avoid the possibility of freezing water pipes, the vent should n

ot be sited nearpipes.

The minimum effective area of the permanent air vent must be:

CF 35/50 56 cm² 9 in²

CF 20/35 30 cm² 4.9 in²

If the room (e.g. kitchen) from which air is drawn, has an extract fan fitted, the

n the opening size of the permanent air vent should take this into account to e

nsure that theoperation of the boiler flue is not adversely affected when the ex

traction fan is running with all doors and windows closed. This should be chec

ked in accordance with BS.5440 Parts 1 and 2.

3. Grilles and Ducts

Any grille and/or duct should be so sited and of a type not to become easily bl

ocked or flooded and should offer low resistance to air flow.

Page 6

SITE REQUIREMENTS - Page 7

FLUE

A 100mm (4 in) internal diameter flue must be connected to this appliance to e

vacuate the products of combustion from the boiler. The flue connecting socke

t on the boiler isdesigned to accept fluepipe to BS. 567. If a fluepipe to BS. 71

5 is to be used an adaptor must be fitted to the boiler flue connecting socket.

Reference should be made to The Building Regulations and British Standard

5440 Part 1. The following notes have been compiled for your guidance:-

The flue pipe should be at least 25mm from any combustible material, or wher

e passing through a wall, floor or roof, be separated from any combustible mat

erial by a non-

combustible sleeve enclosing an air space of at least 25mm around the flue pi

pe.

Ideally a flue should rise vertically to a termination point which is unaffected by

down draught or wind eddies and is not in a pressure zone. Therefore, for pra

cticalpurposes, the flue should have the shortest run possible; 90º bends shou

ld be avoided. The terminal must be at least above roof edge level and must b

e of a type acceptableto British Gas.

Whever possible there should be at least 2 ft (600mm) of vertical flue from the

boiler flue socket.

NOTE: A split socket should be fitted in this length.

Horizontal runs should be avoided. If a near horizontal length is unavoidable, i

t must be followed by at least twice that length of vertical flue.

e) Wherever possible internal stacks, lined if necessary, should be used.

f) All brick chimneys must be lined with a liner acceptable to British Gas.

g) Where condensation is likely a means of draining must be provided.

If an existing flue is being used, ensure that it has been thoroughly swept befo

re lining or connecting the boiler.

ELECTRICITY SUPPLY

A 240V ~ 50 Hz., single phase electricity supply fused at 3A must be provided

in accordance with the latest edition of the I.E.E. wiring regulations and any ot

her localregulations that may apply. The current rating of the wiring to the boil

er must exceed 3 amperes and have a cross sectional area of at least 0.75 m

m² in accordance with BS.6500 1984 Table 16. The method of connection to t

he electricity supply MUST facilitate complete isolation of the appliance, prefer

ably by the use of a fused three-

pin plugand unswitched, shuttered socket outlet, both complying with the requi

rements of BS. 1363.

Alternatively, connection may be made via a fused double-

pole isolator having a contact separation of at least 3 mm in all poles and servi

ng the appliance and systemcontrols only.

TECHNICAL DATA

Maximum working head

- 30.5m (100 ft)

Minimum Working Head (Fully Pumped systems)

- 305mm (1 ft)

Minimum Circulating Head (Gravity systems)

- 1.2m(4ft)

Gas supply pressure

- 20 mbar

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