Baxi Eco 3 Service Manual download pdf (Page 21)

8.0 Installation

8.7 Making The Electrical Connections

To connect the mains input cable proceed as

follows:-

1. Slacken the facia securing screws and lift the

outercase panel so that it’s securing tabs are

clear of the facia. Remove the panel.

2. Remove the screws securing the facia panel

and hinge it down (Fig. 35).

3. Remove the control box cover securing

screws. Disengage the barbs on the control box

from the cover. Remove the cover (Fig. 33).

4. Slacken the cable clamp on the LH side of the

boiler chassis. Insert the cable through the clamp

and route it to the terminal block (Fig. 34).

5. Slacken the screws in the terminal block,

connect the input cable, and tighten the screws.

6. If an external control is to be connected it can

be done at this point. Run the input cable from

the external control through the second cable

clamp on the boiler chassis. Refer to the

instructions supplied with the control.

7. Remove the link between terminal 1 and 2 and

connect the wiring from the external control

(Figs. 36 & 37).

NOTE: If the room thermostat being used

incorporates an anticpator it MUST be wired as

shown in Fig. 37.

IMPORTANT: The external control MUST be

suitable for 230V switching.

8. Ensure that both mains input and, where

fitted, external control input cables have

sufficient slack to allow the control box to drop

down. Tighten the cable clamp(s) on the boiler

chassis.

9. If the optional integral timer is to be used it

should be fitted at this point. Refer to the

instructions supplied with the timer. NOTE: An

external frost thermostat cannot be used with the

integral timer.

8.8 Preliminary Electrical Checks

1. Prior to commissioning the boiler preliminary

electrical system checks should be carried out.

2. These should be performed using a suitable

meter, and include checks for Ground Continuity,

Resistance to Ground, Short Circuit and Polarity.

Always fit fast

blow 2A fuse

Fused supply 3A

230V ~ 50Hz

Live (brown)

Neutral (blue)

Earth (green/yellow)

230V

g/y

Frost Thermostat

Room Thermostat

External Clock

230 V

Selector /

Reset Switch

External

Controls

br b

Pump

Hydraulic Differential Pressure Switch

3-way Valve Microswitch

Safety Overheat Thermostat

NTC Sensor

Gas Valve

Spark Electrode

Spark

Generator

Flame Sensing Electrode

br b

Fan

Pressure Switch

PCB

Fig. 34

Fig. 33

Fig. 36

Fig. 37

Fig. 38

Fig. 35

Terminal Block

Fuse

Cable Clamp

Control Box Cover

Facia Panel

Functional Flow Diagram

Key to Wiring

b - blue

br - brown

bk - black

r - red

g - green

w - white

IMPORTANT: If an integral timer is fitted to the

boiler an external frost thermostat wired as shown

will not operate correctly. Only external timers may

be used in such installations, as in the diagram.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 43 44

Comments to this Manuals

No comments

Baxi Eco 3 Service Manual Page 21

Comments to this Manuals

Related products and manuals for Water heaters & boilers Baxi Eco 3