Intergas Heating Ltd
11
4 OPERATION
4.1 General
The Intergas Combi Compact HRE wall mounted, gas fired boiler is a modulating high
efficiency boiler. This means that the power is adjusted in line with the desired heat
requirement. The aluminium heat exchanger comprises of two separate copper circuits.
As a result of the separately constructed circuits for CH and DHW the heating and hot water
supply can operate independently of each other. The hot water supply takes priority over the
heating. The two systems cannot operate simultaneously.
The appliance is equipped with an electronic boiler controller which, each time heat is
requested from the heating or the hot water supply, starts the fan, opens the gas valve,
ignites the burner and continuously monitors and controls the flame, depending on the
requested output.
By setting a parameter the boiler can be set to operate either on domestic hot water only,
heating only or DHW and heating.
It is possible to use the boiler’s DHW circuit without connecting and filling the central heating
system.
Note
Domestic hot water demand draws preference over heating. During heating periods the
boiler will automatically revert back to heating mode, after a draw off of hot water.
4.2 Central heating mode
When a heating demand is requested (power is on, the timer and thermostat are calling for
heat) the integral pump is energised and the boiler will fire automatically. The hot water is
now circulated around the central heating system. When the end of the central heating
demand is reached (the thermostat reaches temperature or the time clock reaches the end
of its set period) the burner will shut down while the pump remains functioning during a
preset period of time to dissipate any excess heat from within the boiler’s heat-exchanger.
After that the boiler will revert to stand-by, waiting to respond to the next heating or hot
water demand.
During the heating period a call for hot water will take preference over heating.
4.3 Domestic hot water mode
When there is a request for hot water (flow switch closes) the boiler will fire automatically.
When on this moment a heating demand was answered the pump will immediately stop so
all the heat can be used to heat up the DHW.
When the request for hot water ends and the request for heating is still present it is possible
to create a delay (1 – 15 minutes) in answering this request by adjusting the parameter [o]
(See § 10.3).
4.4 Operating modes
A code on the service display of the operating panel indicates the appliance’s operating
mode.
- Off
The appliance is out of operation but is supplied with electrical power. No response occurs
to calls for DHW or CH. The appliance frost protection is active. This means that the pump
operates and the exchanger is heated up if the temperature of the water present in it falls
too far.
If the frost protection is actuated, code 7 is displayed (heating the exchanger).
In this operating mode the pressure in the CH installation (in Bar) can also be read on the
main display.
Waiting mode
The LED at the button is lit and possibly one of the LEDs for the DHW comfort function.
The appliance is ready to respond to a request for CH of DHW.
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General
Weight and Dimensions
