today I'm going to show you how to calibrate the Norton IT22W mechanical line voltage single
pole thermostat now when I moved into this apartment it was completely out of calibration
I calibrated it and now for this video I had to un-calibrate it so that it wasn't turning
on at the right temperature now what you'll need is a digital thermometer so you know
what the room temperature is a screwdriver and that's it now you want to be careful if
you haven't turned off the power and obviously you need to do this with the power on otherwise
you won't be able to tell if its calibrated or not which you'll see when I show you how
to do it so those are the two tools that you'll need is a digital thermometer and a screwdriver
and there's a calibration screw behind the cover which you'll also see so let's get to
it so first of all you pull the cover off as you can see right here is the calibration
screw and here's the bimetallic plate that senses the temperature and expands and contracts
according to the temperature to let the thermostat know when to turn on or off so right now it’s
set to ten that's where the indicator is pointing and that's in Celsius now if you turn it up
to around twenty you might've heard the click that it made which means that its turned on
and its giving power to the baseboard heaters then you'll hear a click again when you turn
it off so obviously it’s not calibrated right right now so here's my digital weather
station that I bought the other day and at the bottom there it'll show you the current
indoor temperature and that's what we are looking for so right now it says twenty two
Celsius so we know that its set for about twenty right now so it'll just be a slight
adjustment now you'll be turning the screw clockwise so you just turn it a little bit
now when you turn on the thermostat you can hear that click and it comes on around twenty
two if we put the cover back its probably more like twenty one
if you want to be more exact you can just keep fine tuning this calibration screw so
we'll turn it just a hair and now we'll adjust this again and you heard the click that means
the heaters are on and its getting power now when we put the cover back on its a little
closer to the actual room temperature of twenty two which I showed you on the weather station
that I just showed so that's how you adjust a line voltage mechanical thermostat for a
baseboard heater it’s not a heat anticipator screw this is just a calibration screw here
and you do need to be careful because there is power connected behind here and you don't
want to accidentally come in contact with live line so it is pretty close to twenty
two as close as you can possibly get it with mechanical thermostat and then now we would
turn it off and you hear a click I'll just put the cover back on right now it's at ten
Celsius so now we'll turn it on again and there's the click and now it looks like
it's more at twenty five and that's why I said it’s not very easy to calibrate these
mechanical thermostats because it’s always off a little bit but you can get as close
as you can and then just leave it there because I could come back later once the bimetallic
plate has had a chance to cool and then it'll probably come on over here when the thermostat
is set like that instead of now coming on where it says twenty five so that's how you
set these mechanical line voltage thermostats
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