Intergas Compact HRE 18 SB User Manual

Intergas Heating Ltd 11
4 OPERATION
4.1 General
The Intergas Compact HRE SB wall mounted, gas fired system boiler is a modulating high
efficiency boiler. This means that the power is adjusted in line with the desired heat
requirement.
The appliance is equipped with an electronic boiler controller which, each time heat is
requested from the heating supply, starts the fan, opens the gas valve, ignites the burner
and continuously monitors and controls the flame, depending on the requested output.
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 demand.
4.3 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
temperature 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.
0 Pump overrun of CH
After the end of CH operation the pump continues to run. The running time is factory set at
the value in accordance with § 10.3. This setting can be changed.
In addition, the pump runs automatically for 10 seconds once every 24 hours in order to
prevent seizing. This automatic switching on of the pump occurs at the time of the last call
for heat. To change the time, the room thermostat setting should be increased briefly at the
desired time.
1 Boiler shutdown when required temperature reached
The boiler controller can temporarily shut down the request for heat. The burner is then
stopped. Shutdown occurs because the requested temperature has been reached. When
the temperature has fallen sufficiently and the anti cycle time has passed the shutdown is
cancelled.
2 Self-test
The connected sensors are checked regularly by the boiler controller. During the check the
boiler controller does not perform any other tasks.
3 Ventilation
When the appliance is started the fan is first brought to starting speed. When the starting
speed has been reached the burner is lit. Code 3 is also visible when post-ventilation is
taking place after the burner has stopped.
4 Ignition
When the fan has reached the starting speed, the burner is ignited by means of electrical
sparks. During ignition the code 4 is visible. If the burner does not ignite, a new ignition
attempt occurs after approximately 15 seconds. If after 4 ignition attempts the burner is not
yet burning, the boiler controller goes into fault mode (See § 11.1 ).
5 CH operation

Intergas Compact HRE 18 SB Specifications

General

Brand	Intergas
Model	Compact HRE 18 SB
Category	Water Heater
Language	English