The timer is single pole, the mechanical switch is double-pole.
As per http://www.timeguard.com/media/2842/FBT4_FBT5_Instructs_135x85_issue3.pdf
. The mechanical switch is downstream from the timer (mechanical towards the appliance, electronic towards the supply), therefore the mechanical switching overrides the timer. For safety of the owner, this is a double-pole device, for the assurance of the appliance you might confer with the appliance manufacturer as to whether they'd approve the use of the single-pole timer for control.
Date published: 2017-09-14