Wiring Diagrams
Volt-free setback switching of the unit’s
controller PCB using single-pole
latching switch and / or volt-free
normally open relay contacts.
To avoid the unit being inadvertently
left in Setback Mode, it is recom-
mended that only one latching switch
is fitted.
Volt-free setback switch or
normally open relay contacts
Setback Switch connection ref EE 152
Three position Rotary Switch TP 508 switching and connection ref EE 153
SWITCH POSITIONS
1 - Setback Speed
2 - Continuous Speed
3 - Boost Speed
L
U1
U2
U3
TP 508
Three position rotary switch