Club 80-90 Forums

Cruz wrote:Is that not good cutting off the cooling down period?

I thought it would wire in before the propex thermostat otherwise there would be power to the thermostat all the time (ie left switched in the on position)

I don't know the construction of a Propex but on Eberspachers and Webastos you run the risk of causing damage to the alloy castings if you do not have the cool down cycle. There will be uneven cooling on the different thicknesses.
All you will need is temperature sensor that holds on a relay to the fan until it has cooled. Or... a timer such as this that is switched on by the switch off signal.(If you can find it)

As propex sell 7 day timer that is just a standard design I'm sure it allows it to cool down. The propex is wired to the battery then the wiring in the diagram then goes to the thermostat. So once the timer knocks off the units warming cycle it will still have power to cool down

I think Titus's timer is fitted to the main power feed hence once the power is cut the until stop dead

I have updated the wiring diagram propex sent me to show a battery powered timer

Cruz wrote:As propex sell 7 day timer that is just a standard design I'm sure it allows it to cool down.

Correct, the Propex has a cool down phase.

Cruz wrote:I think Titus's timer is fitted to the main power feed hence once the power is cut the until stop dead

Also correct, mine stops the Propex as soon as the time period elapses. This could lead to problems but I use the timer as an on switch, I switch off the Propex when I get in the van.

Update:

I've had to sell on the Eco2 timer as thermostatic programmers are designed for homes so when the timer turns the heating off it still has a set 'off' temperature where it turns the unit on if the temp drops below this (frost protect). The lowest you can set this at is 5 degrees and the max is 17. So even when the timer is in the 'off' programmed stage it still tries to keep the minimum temperature so it is no good for the colder months when the temp in the van drops below 5 degrees. So if I wanted to set the propex to come on to warm the van prior to going to work the timer would keep firing up the heater all night to keep the temperature above the 5 degree frost protect level.

Therefore I have swapped for a non-thermostatic timer switch which requires a permanent 12v power source for the clock

http://www.ebay.co.uk/itm/260970851903? ... 97.c0.m619" onclick="window.open(this.href);return false;

Still £60 cheaper than the propex timer