Hi all,
My old Drayton MT721R somehow broke, so we decided on upgrading to a NEST. I have looked at this forum posts, and have followed all the advice here. I got the hot water to work, but the heating doesn't seemed to be.
So I have a Baxi 100/2HE Plus boiler, which has been working fine.
Forgive me I'm not a plumber. Not sure if this is a S or Y plan... I have the valve and a pump as per picture.
The wiring is going to drive the plumbers out there crazy (probably). Here is what I worked out:
Old Honeywell thermostat now removed. I have noted the wiring before removal:
1 and 3 connected. 2 just floating in the air.
I wired the NEST as described in various posts here:
N and L
L to Nest 2 and 5
CH to Nest 3
HW to Nest 6
Turned heating up to 32C (ambient is 29C at the moment) but boiler is not firing up. In fact the power light is off.
The boiler will power up on "manual boost" so something is working, but there was no heating with that. Water is scorching hot so pretty sure hot water is working (immersion tank heat is wired separately.
I must have wired something wrong somewhere. Please point me to the right direction! Thanks.
Adrian
My old Drayton MT721R somehow broke, so we decided on upgrading to a NEST. I have looked at this forum posts, and have followed all the advice here. I got the hot water to work, but the heating doesn't seemed to be.
So I have a Baxi 100/2HE Plus boiler, which has been working fine.
Forgive me I'm not a plumber. Not sure if this is a S or Y plan... I have the valve and a pump as per picture.
The wiring is going to drive the plumbers out there crazy (probably). Here is what I worked out:
Old Honeywell thermostat now removed. I have noted the wiring before removal:
1 and 3 connected. 2 just floating in the air.
I wired the NEST as described in various posts here:
N and L
L to Nest 2 and 5
CH to Nest 3
HW to Nest 6
Turned heating up to 32C (ambient is 29C at the moment) but boiler is not firing up. In fact the power light is off.
The boiler will power up on "manual boost" so something is working, but there was no heating with that. Water is scorching hot so pretty sure hot water is working (immersion tank heat is wired separately.
I must have wired something wrong somewhere. Please point me to the right direction! Thanks.
Adrian