Worcester 28CDI Instrucciones de operaciones descargar pdf (Pagina 40)

When hot water is no longer required the appliance pump (or fan)

may continue to operate to dissipate the residual heat within the boiler.

A flow restrictor is fitted within the appliance which limits a hot

water delivery rate to a maximum of:

24CDi 9.0 (±15%) litres/minute

28CDi 10.0 (±15%) litres/minute

35CDi II 12.0 (±15%) litres/minute

Hot Water and Central Heating mode:

When a demand is made for heating by the system controls (i.e. a

programmer or room thermostat), the pump will energise, circulating

primary water around the heating system and the burner will light.

The heat output from the

appliance in this mode has

been factory set to maximum.

The appliance will operate as

necessary to maintain the

temperature of the radiators

at the level set by the

adjustment of the Heating

Temperature Control Knob.

(See Fig. 2.)

If the system no longer

requires output to maintain

the desired room temperature,

the burner will extinguish.

The pump will continue to

run for a short period to

dissipate the residual heat

from the appliance and then

switch off.

The appliance will supply

heat to the central heating

system as required. A demand

for hot water at a tap or

shower will override the

central heating function for

the period of the domestic hot

water demand.

Fig. 1. System Diagram.

Automatic air

vent

Gas to water

heat

exchanger

Circulating

pump

Water to

water heat

exchanger

Diverter valve

flow

Domestic

hot water

out

Domestic

cold

supply

return

Safety

discharge

Pressure

relief valve

Boiler

Expansion

vessel

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 46

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Worcester 28CDI Instrucciones de operaciones Pagina 40

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