Operating instructions

ManualsBrandsAtmos ManualsBoilerInterCombi HE32

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Commissioning

The appliance should be installed and commissioned by an authorised

installer. Check the following:-

Never connect the appliance to the mains voltage without filling and

de-aerating the appliance, CH system and hot water system.

1. Confirm that the appliance and system have been filled and de-

aerated. The water pressure in the CH system should be minimum

1 bar and maximum 2 bar for a cold system (by reading the CH

pressure gauge on the display; see 9 in the diagram).

2. Check that the electrical supply is switched on and the gas supply

is on.

3. Set the room thermostat lower than the room temperature.

Assuming that the appliance is in standby (horizontal mark on the

service display and remaining functions are off), switch on the

appliance with the on/off button on the display. If the domestic hot

water comfort function is switched to “on” or “eco”, the appliance will

heat up the heat exchanger automatically (3, 4, 7 on the service

display).

4. Set the room thermostat higher than the room temperature. The

appliance will start CH operation (5 on the service display) , heating

the CH supply water to the set temperature (see CH operation).The

set temperature can be adjusted (lower in case of mild weather,

higher if the outside temperature gets colder).

Note: If an Open Therm thermostat is used, or if weather

dependent control is used, these settings do not have to be

adjusted manually.

Solar Hot Water System

The InterCombi can be used with an Atmos solar hot water system to

provide pre-heated water to the appliance. The temperature of the

domestic hot water should not be set below 60°C.

Frost protection

In order to avoid freezing of the condensate discharge pipe, the appliance

should be installed in a frost-free room. In order to avoid freezing of the

appliance (heat exchanger), it has an appliance frost protection. When the

temperature of the heat exchanger drops to 5ºC, the burner will be

activated and the pump will start running until the temperature of the heat

exchanger reaches 10ºC. When the system (or a part of it) can freeze, a

frost thermostat should be installed in the area to be protected. Connect

this according to the wiring diagram (see also the Installation instructions).

Note!

The external frost thermostat is not active when the appliance has been

switched off at the operating panel or when the mains voltage has been

interrupted.

Faults

If one of the following simple faults occur, they may be remedied as

follows. In case of recurrence, or other faults, please contact your

installer.

The CH System does not reach the correct temperature:-

• Increase the temperature on the room thermostat.

• Open the radiator valves.

• Increase the CH water temperature by means of the CH / HW

switch button and the + and – button on the display.

• De-aerate the appliance and the radiators and check the pressure

gauge on the display is between 1 and 2 bar (for a cold system).

The hot water does not heat up:-

• Open up the hot water tap further.

• Increase the hot water temperature by means of the CH / HW

switch button and the + and – button on the display.

The fault LED above the Reset button lights up and the service

display flashes with code 0, 1, 2 or 3:-

The boiler is getting too hot, due to insufficient circulation.

• Open the radiators, de-aerate the appliance and installation and

check the CH water pressure. Fill up if necessary.

After remedying the cause, press the Reset button for 5 secs and the

appliance will start-up again.

Filling and de-aerating the appliance and installation

Note: Switch off the electrical supply to the appliance until this has been

completed.

CH-system:

In order to obtain a proper functioning CH system, the pressure should

be between 1 and 2 bar for a cold system. If the pressure is too low, the

installation has to be filled. Proceed as follows:-

Check that the filling hose is connected below the appliance (connects

between the cold water inlet pipe and the CH return pipe).

Normally the hose tap from the CH return is left open and the hose tap

from the cold water is left closed. Open the latter tap.

Fill the appliance and CH system with clean tap water.

De-aerate the appliance using the manual air vent (needs a vent key to

open) situated on the left hand on top of the appliance (or, alternatively, if

an automatic air vent has been fitted, check that the cap on top of the

valve is loosened).

De-aerate the installation using the manual air vents on the radiators

and/or a de-aerate valve in the pipes. Fill the appliance and CH system

up to a pressure between 1 and 2 bar for a cold system and then close

the cold water hose tap. Check for any leaks.

If filling is necessary more than a few times a year, please contact your

installer Note: The corrosion inhibitor will become diluted.

Hot water supply:

De-aerate the system by opening a hot water tap. Keep the tap open

until all the air has left the system. Check the pipes and connections for

leaks.

System Shutdown

Drain the appliance and the system when the mains voltage

has been disconnected and there is a chance of freezing.

1. Drain the appliance using the filling/drain tap.

2. Drain the system at the lowest point.

3. Close the main valve for the cold water supply to the boiler.

4. Drain the appliance by disconnecting the domestic hot water

connections underneath the appliance or opening hot water taps.

Servicing the appliance

The appliance, the installation, the flue discharge and air supply should

be serviced every year by a qualified service engineer. The appliance

can be cleaned with a damp cloth. Do not use any aggressive or sanding

cleaner.

Guarantee

Atmos guarantees the heat exchanger for 5 years as detailed in the

Installation Manual, and other parts for 2 years (except ignition probe,

ionisation pin, glass fuse, thermocouple and de-aerator) including labour.

The provision of service and the execution of the guarantee is the

responsibility of the installer from whom you purchased the appliance.