Hoval TopVent GV, Руководство по эксплуатации, Страница: 30 / 44

9.3 Service mode
The following operating modes can be forced for maintenance work
( emission measurement, setting of the gas control valve):
■ Partial load operation (→ min. heat output, min. air flow rate)
■ Full load operation (→ max. heat output, max. air flow rate)
Activate the service mode at the burner control display:
■ Press and hold the [ ] and [–] buttons for a few seconds.
– The display will alternate between 'Lo' and 'St'.
– The heater starts up in partial load operation.
■ Press the [–] and [+] buttons to toggle between partial load and full load
operation.
■ Press the [–] button until '0' is displayed to exit the service mode.
– The fan continues to run to cool down the heat exchanger.
The service mode will automatically end after 10 minutes.
Attention
For service operation, the control system must be installed.
Otherwise, the fan does not run and the heat exchanger will get too hot.
9.4 Emission measurement
A flue gas analyser is required which records the following measured values:
■ CO concentration of the flue gas
■ CO
2
concentration of the flue gas
■ Combustion air temperature
■ Flue gas temperature
■ Flue gas loss
Perform the emission measurements under partial load and full load operation.
For this purpose, use the measurement openings in the exhaust spout and the
access panel. To measure the combustion air temperature, remove the plugs in
the measuring opening and insert the sensor to a depth of approx. 150 mm.
Notice
For emission measurements from the roof (where this is permitted),
suitable measurement openings in the 3-shell pipe must be installed
directly over the roof and be sealed gas-tight.
Proceed as follows:
■ Force partial load or full load operation (see section 9.3).
■ Wait approx. 5 minutes until the unit is in the steady-state condition. Then
perform the emission measurement.
■ Prepare a measurement report and deliver this to the operator for safekeeping.
Fig. 20: Burner control display
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TopVent ® TG | GV | MG
Operating instructions
Initial commissioning
4 220 656-en-03 4 220 656-en-03