OVEN VENTING SYSTEMS
See Fig. 8
The appliance oven venting pipe can be achieved up to a maximum length of 6 metres, through
an outside wall. Great care must be taken in all-timber houses.
If the oven vent pipe passes through combustible material, there must be an air gap of at least
25mm around the pipe and preferably wrapped with insulation material.
The max supply to the motor, as calculated should be limited to 24V (DC), for ideal
operating conditions.
Calculating the voltage for the particular pipework is as follows:-
1. Keep the pipe run as simple as possible - avoid bends.
2. “Vertical risers” are not permitted.
3. Pipe run should be horizontal - slight downwards slope towards the fan.
Minimum 12 volts for first metre of vent pipe run inclusive of 1 bend
Each extra metre add 1 volt.
Each extra bend add 2 volts
Maximum allowed 24 volts.
Minimum setting is 15 volts.
NOTE: IN THE OVEN VENTING, PROVISION MUST BE MADE FOR EASY ‘RODDING’ OF
THE PIPEWORK TO FACILITATE CLEANING.
13
Fig. 8 DESN 516111
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