Help with my storage heater

[hawkins75]

Hi , i have a creda 70213c storage heater in my living room but cannot find a manual anywhere to download. I understand that the input dial decides how much heat is stored overnight and the output dial decides how much is released but i need further help.
The right hand knob has numbers printed from 1-6 on the base however there are more numbers on the actual knob that you can twist around.
The left hand knob marked as output twists to off , normal, combi , and boost what do each of these mean. I want to make my usage as cheap as possible.
Please help me as its driving me nuts now lol

 

[DIYBaz]

Hopefully someone with more knowledge than me will give you a full answer, but I'm guessing this unit has 2 connections to the mains supply. 1 foe the economy 7 and another for constant power.
The combi & boost functions will utilise peak rate electric to either drive a fan to increase the output taken from the night store of heat, or drive a fan & run electric elements off the peak supply. The latter will clock up the £.

 

[hawkins75]

so to use my storage heater only on economy seven i would only switch the economy seven wall switch on and leave it on normal and not boost or combi ?????

 

[DIYBaz]

Yep! That should be your cheapest option. Running the fan (boost - I think) won't use a lot of peak rate electric, but over use might mean you run out of heat before your next load of night charge. Running the fan & the instant heat (combi - I think) will cost you a fair bit, although how much depends on your actual tariff.