Operating instructions

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Atmos InterCombi

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User Operating Instructions for Atmos InterCombi HE32 Condensing Boiler

First ask your installer to instruct you thoroughly about filling, de-

aerating and general use of the appliance and the total installation.

General operation

The Atmos InterCombi wall-mounted gas boiler is a balanced flue

appliance, designed for delivering heat to the water of a central heating

system and domestic hot water. The Atmos InterCombi wall-mounted

gas appliance is a modulating high efficiency (Sedbuk A) boiler. This

means that the power is adjusted to the heat demand.

In the aluminium heat exchanger, two separate copper circuits have

been integrated. Because of the separated circuits for central heating

and hot water, the heating and the hot water supply can operate

independently of each other. However, they cannot work simultaneously.

The hot water supply has priority over the central heating.

The appliance has been provided with an electronic burner controller that

controls the fan with the heat demand from the heating system or the hot

water supply, opens the gas valve and ignites the burner, continuously

monitors the flame and controls it dependent on the power required.

Central Heating (CH) operation

If the room temperature is below the room on/off thermostat temperature

and there is no hot water demand, the boiler will switch to CH operation.

The controller adjusts the fan speed, and hence the heating power,

according to the set CH supply water temperature, the latter being

displayed on the temperature display (during CH operation and

adjustable between 30 and 90 °C, using + / - buttons). The appliance

circulation pump has an overrun time of 1 minute (factory setting, but can

be adjusted) to dissipate the heat. Also, the pump will automatically run

once every 24 hours to prevent it from getting stuck (if there is no CH

operation).

Domestic hot water (HW) operation

Domestic hot water operation will automatically start as soon as more

than 2 l/min hot water is demanded. During hot water operation, CH

operation is interrupted. The appliance pump does not run for HW

operation.

During hot water operation, the hot water set temperature is displayed on

the temperature display (adjustable between 40°C and 65°C, using + / -

buttons ). For a quick supply of domestic hot water, a comfort function has

been provided in the controller. This function keeps the heat exchanger at

the correct temperature. This comfort function can be set using the hw

store button (E) and has the following settings:-

• Off: (Both LED’s 5 & 6 off.) The heat exchanger is not kept warm,

delaying the supply of domestic hot water. When there is no

requirement for domestic hot water, the comfort function can be

switched off.

• On: (LED 6 on) The comfort function of the appliance is

continuously activated. The appliance always supplies domestic

hot water immediately.

• Eco: (LED 5 on) The comfort function is self-learning. The appliance

is inactivated during the night or after a long absence. The appliance

adjusts to the user pattern of the domestic hot water requirements.

The Eco mode is the most efficient hot water method and should

normally be used.

The Atmos InterCombi boiler has the CE quality mark and an IP44

enclosure. The boiler delivers 9 litre per minute at 60°C (this

corresponds to 15 litre per minute at 40°C). This means that a 120 litre

bath can be filled with hot water at 40°C within 8 minutes.

Displays

Controls

1. On/Off LED 6. Comfort function On LED A. On/Off button E. Comfort button

2. CH LED 7. Service display B. CH/Hot water switch button F. Service button

3. Hot water LED 8. Fault LED C. – button G. Reset button

4. Temperature display 9. CH pressure gauge D. + button

5. Eco mode LED

Operating conditions on the service display (7):

—

Off (frost protection active)

Self-test

CH operation

Stand-by

Fan

Domestic hot water operation

Pump overrun CH

Ignite burner

Heating the appliance (heat exchanger)

Required temperature reached

When the red fault LED (above the Reset button) is on, the burner controller has detected a fault. In the service display, a flashing fault code appears.

1 2 3 4 5 6 7 8 9

A B C D E F G

ATMO

Summary of content (2 pages)

PAGE 1
Atmos InterCombi ATMOS User Operating Instructions for Atmos InterCombi HE32 Condensing Boiler First ask your installer to instruct you thoroughly about filling, deaerating and general use of the appliance and the total installation. Domestic hot water (HW) operation General operation The Atmos InterCombi wall-mounted gas boiler is a balanced flue appliance, designed for delivering heat to the water of a central heating system and domestic hot water.
PAGE 2
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 deaerated. 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.