Alpha Alpha CB24 Guide de démarrage rapide

Instructions for adjusting a

replacement printed circuit board

Alpha CB/SY/C Boiler Range

1. GENERAL

When the Printed Circuit Board (PCB) is replaced the following adjustments must be carried out:-

a. Set the ignition gas rate so that the ignition of the burner is smooth and quiet.

b. Adjust the central heating output.

c. Ensure that the JP1 plug is correctly positioned for the type of gas the boiler is being used with.

MET - Natural Gas LPG - Liquefied Petroleum Gas

d. Ensure that all electrical plugs and connectors are pushed fully home and soundly connected.

Note: Before fitting a new PCB ensure the polarity of the electrical supply is correct by testing the supply, using a

suitable multimeter, as follows:-

Live to Neutral 240 Volts AC

Live to Earth 240 Volts AC

Neutral to Earth zero Volts AC

Note: i) Before fitting the PCB, carefully bend the red and yellow neons through 180° so that they locate into the

control panel - see Fig. 1 or 2.

ii) When the selector switch is turned to the reset position, there will be a delay of approximately 30 seconds

before the PCB will reset.

2. FIT AND ADJUSTTHE REPLACEMENT PCB

Refer to the Installation and Servicing instructions for gaining access to and for replacement of the PCB. To adjust the

PCB the gas valve burner pressures must be measured. Loosen the burner test point screw on the gas valve and

connect a pressure gauge. After adjusting the PCB disconnect the pressure gauge, tighten the test point screw and

test for gas soundness using a suitable leak detection fluid.

Set the Ignition Gas Rate (IGR)

When there is a demand for either Heating or Hot Water, the burner will light at the IGR approximately 5 - 10 seconds

until the flame sensing electrode detects the flame, then the burner pressure will increase to the required output.

During the first 5 seconds the IGR pressure must be read on the pressure gauge. If the ignition gas rate is incorrect,

adjust the IGR pressure as follows:-

a. Set the selector switch to (DHW only) and turn the hot water thermostat to the maximum position.

b. Carefully locate a small insulated screwdriver into the potentiometer P3 (IGN CAP) - see Fig. 1 or 2.

c. Fully open a hot water tap so that the boiler fires and record the IGR.

d. If the IGR is incorrect, rotate the screwdriver (Clockwise to Increase - Anticlockwise to Decrease), to achieve a

smooth ignition (see table below).

e. After each adjustment of the potentiometer, repeat the above process from paragraph c.

IGR Pressure (Approx.)

Nat. Gas LPG

mbar

5.0

3.0

5.0

mbar

10.0

in w.g.

2.0

1.2

2.0

in w.g.

5.2

Boiler

CB24, CB24X, SY24

CB28, CB28X

CB50

C23/27

Compiled and designed by Publications 2000, Tel (01670) 356211 0/04/D134

Fig. 1 - CB24/28, SY24 and C23/27

Adjustment of the Central Heating Output

The Central Heating Output will normally be set to maximum. If however the system needs to be Range - Rated, adjust

the CH output as follows:-

a. Set the selector switch to and the heating thermostat to maximum to operate the boiler on central heating.

b. Carefully locate a small insulated screwdriver into the potentiometer P4 (CH CAP) - see Fig. 1 or 2, which should be

fully clockwise.

c. To Range - Rate the heating output, the potentiometer can be turned anticlockwise to the required output.

Fully clockwise Maximum output

Fully anticlockwise Minimum output

Half way Approximately 16.1 kW (55 000 Btu/h) for CB24, CB24X, SY24 & C23

Approximately 20.5 kW (70 000 Btu/h) for CB28, CB28X, CB50 & C27

Fig. 2 - CB50

These instructions have been carefully prepared but we reserve the right to

alter the specification at any time in the interest of product improvement.

Alpha Therm Limited.

NepicarHouse,LondonRoad,WrothamHeath,

Sevenoaks, Kent TN15 7RS

Tel: 0870 3001 964

email: info@alphatherm.co.uk

website: www.alpha-innovation.co.uk

N/A C23/27

Autres manuels pour Alpha CB24

Ce manuel convient aux modèles suivants

Table des matières

Autres manuels Alpha Chaudière

Alpha

Alpha Alpha CB24 Manuel utilisateur

Alpha

Alpha Alpha CB Boiler Manuel utilisateur

Alpha

Alpha E-Tec 25R Guide de l'utilisateur

Alpha

Alpha 26C Manuel utilisateur

Alpha

Alpha Evoke 28NX Manuel utilisateur

Alpha

Alpha InTec2 25XE Guide de l'utilisateur

Alpha

Alpha Alpha CD25X Guide de l'utilisateur

Alpha

Alpha InTec2 26CE Guide de l'utilisateur

Alpha

Alpha Alpha 240XP Manuel utilisateur

Alpha

Alpha SY9-24 Manuel utilisateur

Alpha

Alpha ARES Pro 150 Guide de l'utilisateur

Alpha

Alpha Alpha CB Boilers Manuel utilisateur

Alpha

Alpha Alpha Plus DH Units Mode d’emploi

Alpha

Alpha SolarSmart 90 Guide de l'utilisateur

Alpha

Alpha Alpha CB50 Boiler Manuel de la liste des pièces

Alpha

Alpha E-Tec 15R Guide de l'utilisateur

Alpha

Alpha Alpha CB Boiler Manuel utilisateur

Alpha

Alpha Ocean Style FF Manuel utilisateur

Alpha

Alpha Alpha 240X Guide de l'utilisateur

Alpha

Alpha Alpha CD13R Manuel utilisateur

Alpha

Alpha Alpha CB24 Manuel utilisateur

Alpha

Alpha E-Tec 28 Manuel utilisateur

Alpha

Alpha Pro Tec Plus 50 Guide de l'utilisateur

Alpha

Alpha 47 532 69 Guide de l'utilisateur

Manuels Chaudière populaires d'autres marques

Vaillant

Vaillant uniSTOR VIH SW GB 500 BES Manuel utilisateur

Radijator

Radijator BIO max 23.1 Manuel utilisateur

Brunner

Brunner BSV 20 Manuel utilisateur

Buderus

Buderus Logamax GB062-24 KDE H V2 Manuel utilisateur

Potterton

Potterton 50e Fiche technique

UTICA BOILERS

UTICA BOILERS TriFire Manuel utilisateur

Joannes

Joannes LADY Series Manuel

ECR International

ECR International UB90-125 Manuel d'instructions

Froling

Froling FHG Turbo 3000 Manuel utilisateur

Froling

Froling P4 Pellet 8 - 105 Manuel utilisateur

U.S. Boiler Company

U.S. Boiler Company K2 Manuel utilisateur

Henrad

Henrad C95 FF Manuel utilisateur

NeOvo

NeOvo EcoNox EF 36 Manuel utilisateur

Potterton

Potterton PROMAX SL 12 Manuel utilisateur

Eco Hometec

Eco Hometec EC 25 COMPACT Manuel utilisateur

Viessmann

Viessmann VITODENS 200 Mode d’emploi

Baxi

Baxi Prime 1.24 Manuel utilisateur

REXNOVA

REXNOVA ISA 20 BITHERMAL Manuel utilisateur