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4

Blockage

The red 

 LED lights up to indicate blockage of

the boiler.

Direct operation on the microphone
of the receiver

All functions performed via telephone may also
be performed locally by holding the loudspeaker
of the emitter against the microphone of the
receiver.
- Put the 

 key in the ON position. The 

 LED

will light up.

- Bring the loudspeaker at the back of the emitter

up close to the microphone 

 of the receiver.

- Follow the operations described in ”Remote

Control”, remembering:

- The digits of the access code need not be

entered.

- Press the 0 key. The following message will be

emitted: ”Roca Heating. Select function.”

If any calls come in on the telephone line while
the emitter is being used, the call is given priority
and all messages sent via the receiver’s
microphone are cancelled.

Cleaning

General cleaning must be done by specialised
personnel whenever necessary, but at least once
a year. The most common operations are
described in this chapter.
- Interrupt the electrical supply to the boiler using

the switch (1).

- Close the valves for access of fuel to the burner.
- Open the door of the boiler and disconnect the

earth point connection with the right panel.

- Remove the door, separating it from its supports

and chains.

- Remove the securing nut (11) from the burner

at the flange and separate from the boiler, taking
care not to damage the fuel or electrical
connections. See

 Fig. 2

.

- Remove the 4 securing nuts (12) from the front

cover of the boiler, and remove the cover itself.
See

 Fig. 3

.

- Remove the turbulisers from the fume ducts (13)

and clean them. See

 Fig. 4

.

- Clean the silencer incorporated in the front cover.
- Protect the furnace bed with paper or similar,

and clean it with the brush provided. Proceed
similarly for the fume ducts.

- Remove the paper etc. from the furnace with all

traces of cleaning materials, as well as any
deposits left in the draught plate (optional) at
the base of the chute.

- Repeat the above operations in reverse order

to reassemble the components.

Maintenance

Maintenance operations must be performed by
specialised personnel, in accordance with current
regulations. At minimum, they must include:
- At the end of each heating season or before a

long period of disuse, the generator must be
cleaned without letting the soot harden.

- At least once a year, the maintenance operations

described in the burner instructions must be
carried out.

- A ”combustion analysis” must be performed once

a year. Regulation when suitable to adjust the
indexes to the levels determined by current
regulations.

- The chute must be cleaned at least once a year.
- All regulation, control and safety devices must

be checked for correct operation at least once a
year.

Important Recommendations

- In the event of prolonged periods of disuse, the

unit must not be emptied.

- Water must only be added to the unit when

unavoidable fill-ups are necessary.
This operation must only be performed when
the water in the generator is cold.

- Frequent fill-ups may cause lime furring in the

generator and damage it greatly, causing it to
lose efficiency.

- If the unit is located in an area prone to freezing,

some anti-freeze agent must be added to the
water in proportion to the minimum outside
temperature of the place.

EC Compliance

LAIA GTI, GTI-R and GTI-T boilers and
Heating Units conform to European
Directive 89/336/EEC on Electromagnetic
Compatibility.

ATC 

ROC

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