Technical data

11
OVEN VENTING SYSTEMS
See Figs. 9, 10, 11 & 12
Pre-site visiting will have determined where and how the layout of the oven vent pipework should
be designed and installed. It is then necessary to check that the pipework design and the
pipework resistance are within the parameters possible.
The appliance oven venting pipe can be achieved, up to a maximum length of 6 metres, through
an outside wall or unused flue etc. Great care must be taken in all-timber houses.
If the oven vent pipe passes through combustible material, there must be an airgap of at least
25mm around the pipe and preferably wrapped with insulation material.
Setting the Vent Fan (Motor Speed)
Setting of the motor speed is carried out by adjusting the Voltage Regulator (VRI) on the
controller PCB in conjunction with a voltmeter. (See Fig. 10).
The max supply to the motor, as calculated in Fig. 9, should be limited to 20v (DC), for
ideal operating condition.
Calculating the voltage for the particular pipework layout is as follows: (See Fig. 9).
Alternative Oven Venting Systems
Venting may be achieved directly into the flue providing a stabiliser is fitted. See Fig. 11.
NOTE: IN THE OVEN VENTING INSTALLATION, WHETHER FAN ASSISTED OR NATURAL
FLUE, PROVISION MUST BE MADE FOR EASY ‘RIFLING’ OF THE PIPE WORK TO
FACILITATE CLEANING.
Fig. 9 - Voltage Circulation Fan DESN 513942