Atmos Energy InterCombi HE32 User Manual download pdf (Page 21)

5.1.4 Underfloor heating

For a good operation of the domestic hot water supply, there must be no

undesired circulation through the appliance caused by a second pump of

the CH circuit.

Connect underfloor heating with an electric shut-off valve (two-way

valve) to prevent circulation through the appliance when there is no

demand for central heating.

L/min

Bar

A. Boiler

B. Pump

C. Thermostatic control valve

(Note: Valve for underfloor heating has remote sensor)

D. Spring-operated non-return valve

E. Electrical shut-off valve 230 V ~

F. Radiators

G. Room/clock thermostat

H. Maximum thermostat

5.2 Hot water system

1. Flush the system thoroughly.

2. Mount the cold and hot water pipes to the mounting bracket.

Remarks

• To comply with the Water Regulations, the maximum length of an

uninsulated hot water pipe with a diameter of 15 mm is 12 m; and

the maximum length of an uninsulated hot water pipe with a

diameter of 12 mm or 10mm is 20 m.

Note that it is preferable to insulate the hot water pipes.

• When the appliance is used for hot water supply only, the heating

function can be switched off by changing the parameter 1 setting

(see § 7.2 and § 7.3). The CH system does not need to be

connected or filled.

• If the appliance is shutdown during the winter, the domestic hot

water should be drained to prevent freezing. For this, the cold

water connection at the bottom of the appliance must be

disconnected.

Thermostatic Mixing Valve (Option)

The initial ‘slug’ of hot water may be in excess of 60ºC irrespective of the

settings. If this is deemed to be a risk to the user or undesirable, then a

TMV should be installed or mixing taps should be used.

Hot Water Output

The graph for the hot water flow/ resistance is shown. The maximum

system resistance for 9 litre/min flow rate is approx 0.75 bar or 7.5m

head.

A (Not applicable)

B. InterCombi HE32

X. Water pipe pressure in bar

Y. Water flow rate in l/minute ± 10%

5.2.1 Appliance with pre-heating by solar system

This appliance is suitable for use with an Atmos MonoSolar preheated

tank and solar panel. Ask Atmos for details.

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