I just want to double check things before I install this.
I have a Vaillant ecotec combi boiler (couldn't tell you which model).
Its wired to a junction box in the hall cupboard. Off the junction box is a drayton heating and hot water timer. A separate 4 core wire goes to a honeywell mechanical thermostat mounted in the hall. The wires are earth, neutral live and switched live.
I presume I leave the timer in place and wire the current thermostat wire to the nest heat link (removing the earth) live to live with a jumper to common, neutral to neutral then switched live to terminal 3 (call for heat). T1 and T2 are low voltage to the thermostat.
Leave the timer control to always on for the heating and hot water timed through the timer as normal.
I presume this will work fine as the timer will always be calling for heat but the thermostat will then control on and off depending on temperature and time (instead of just time as the honeywell T40 currently does).
Does this seem correct?
With thanks as always.
I have a Vaillant ecotec combi boiler (couldn't tell you which model).
Its wired to a junction box in the hall cupboard. Off the junction box is a drayton heating and hot water timer. A separate 4 core wire goes to a honeywell mechanical thermostat mounted in the hall. The wires are earth, neutral live and switched live.
I presume I leave the timer in place and wire the current thermostat wire to the nest heat link (removing the earth) live to live with a jumper to common, neutral to neutral then switched live to terminal 3 (call for heat). T1 and T2 are low voltage to the thermostat.
Leave the timer control to always on for the heating and hot water timed through the timer as normal.
I presume this will work fine as the timer will always be calling for heat but the thermostat will then control on and off depending on temperature and time (instead of just time as the honeywell T40 currently does).
Does this seem correct?
With thanks as always.