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Cointra OPTIMA COB 11 D Instrucciones De Uso, Instalación Y Mantenimiento página 34

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4.4 EvACUATION OF BURNT GAS
Evacuation of burnt gas pipe.
The burnt gas evacuation pipe must have the following diameters, depending on model:
• Models COB 11 D.
- Pipe for fitting the draft diverter on the inside. Ø 110 mm.
- Pipe for fitting on the outside. Ø 120 mm.
- Couplings for draft diverters are found at specialist trade stores.
The mass flow rates for calculating flues are found in the table on page 34.
Ensuring the correct evacuation of combustion gases.
To ensure the system is functioning with the water heater's nominal power, check the tightness of the whole combustion gas
evacuation system through a spray plate, cooled mirror or any other approved apparatus,
Maintenance.
Recommended on an annual basis. This must be carried out by an Official Technical Service.
4.5 MOUNTING THE COvER
If for any reason you need to remove the cover for installation:
• Remove the gas knob and temperature selector by pulling them out.
• Loosen the screws connecting the cover.
• Assemble the controls by pressing them inwards.
4.6 CHECk AND COMMISSIONING
• Ensure that the installation meets on ALL REQUIREMENTS OF THE REGULATIONS IN FORCE IN THE COUNTRY IN
WHICH THIS INSTALLED.
• Check the complete sealing of the gas and water circuits.
• Turn on the heater and check its operation for 15 min, teach the user the proper handling and use of heater and give this
instruction manual
4.7 CONTROL DEvICE FOR THE EvACUATION OF GASES (T.T.B.)
• The T.T.B. safety element that is fitted to the water heaters ensures that combustion products are evacuated properly and
should, therefore, not be deactivated and uncontrolled interventions should not be performed on it. In case of disturbances
in the evacuation of combustion products the device interrupts the gas supply to the burner.
• If the T.T.B. device is activated once the water heater is turned on, revise the burnt gas outlet by checking the evacuation with
a cooled mirror with running water, or any other measuring device approved for this purpose.
• In case of damage, use only original spare parts as the T.T.B. device may not work properly otherwise.
• The T.T.B. device should be replaced by experts as follows:
- Remove the defective T.T.B. device by loosening the two screws holding it together.
- Remove the thermocouple.
- Insert a new original thermocouple.
- Attach the T.T.B. device to the smoke box without forcing the screws.
- Check it is working properly.
• Models for "Exclusive outside installation" do not need this device.
vERY IMPORTANT
IN THE PREMISES WHERE THE WATER HEATER IS LOCATED,
DO NOT FORGET TO OPEN THE AIR INLET AND, WHERE AP-
PROPRIATE, THE AIR OUTLET AS PER THE REqUIREMENTS
OF THE GAS INSTALLATIONS REGULATIONS.
TO MAINTAIN A CLEAN ENvIRONMENT, REMEMBER TO DI-
SPOSE OF USED BATTERIES IN CONTAINERS PREPARED FOR
COLLECTING THESE PRODUCTS.
EN
34
cod. 30902370 - Rev. 01 - 11/2017
OPTIMA
MASS FLOW RATES OF P.D.C.
(UNE-EN 26 5.2.1.4 b)
14-litre Models
GAS
Qn
g/s
G20
15,1
G30/G31
14,1
Qm
g/s
12,5
11,7

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