On my 2004 Pathfinder to drain the hot water tank you set the yellow tog switch that is found next to the hot water tank in to the vertical position and if you look under the camper you should see the water draining out.
To fill the tank you have to open all taps and let the water run for a good 3-5 minutes to ensure there is no air block, you should then have hot water in about 20-30 mins after that.
When running off the EHU there is no manual thermostat but it does get very hot.
Bought a 2005 model recently and just used it for first time
No instructions for water system -does anyone have a set as I am having a few problems and also need to know how to drain it
There's a little yellow toggle [drain] next to the heater. You'll know if it's in the wrong position when you set up because it'll nicely dump all the water you draw through straight onto the pitch just behind the pump.
So, get that in the correct position, run some water through by operating the tap and then switch the heater on with the little switch on the front of the seat.
Before packing away, switch the switch off and open the yellow toggle to drain.
"When running off the EHU there is no manual thermostat but it does get very hot."
the switch for the water heater on the front of the shorter bench seat has a thermostat next to it which I thought was for the heater when on EHU? As we don't leave the water on all day and night I couldn't be 101% sure but it certainly appears to be the case.
I always turn on taps in the toilet compartment to draw the water through. You know when the tank is full when the tap stops spitting and popping and get a proper stream of water.
Always make sure that you switch off the heater when you are draining the tank
Cheers
Mark
Not 100% sure about the thermostat on gas as we have to use an electric hook up - for various other tedious non camping reasons.
I always set the thermostat on electric and it appears to work - or maybe I am just fooling myself!
A friend has a Truma instruction leaflet and is going to email me a copy - when he gets around to it.
The unit in the link above from Mark looks similar but I don't think its the same unit inside a different casing.
As well as making sure the heaters full before you switch it on - make sure you have checked the drain tap is off before you try to fill - and when Captain Paranoia is sitting on your should er whispering in your ear asking if you are sure that you really have closed the drain - go outside and look to make sure there is no water running out of the drain hose!
If that instruction leaflet turns up anytime soon I'll post it here
From memory and without checking my paperwork, we have to set all of the hot water systems in our building at a minimum of 65 due to the risk of lysteria and other water born nasties and consequently they get set a bit higher than 65 just in case the thermostat isn't as consistent as it should be. That said a temp lower than 65 can be set when using gas - maybe there are different guidelines for gas water heaters.
Well at least I now know that all the time I have been dutifully setting the thermostat knob on my Pathfinder I have been wasting my time :o(
Hmm didn't know that about lysteria etc - we set our home hot water thermostat to 60 to save energy as many sites recommend - never really thought about that