[simon w]

Hi Steve.

Like me I believe you have the 9kw 2 man Pure Freedom Isothermal water heater.

I've had mine now since mid December and although it heats water very well and is generally a good piece of kit I have had a real nightmare trying to keep the batteries charged, although I have a split charge relay fitted I am finding the Flowmasters showing that the voltage is low and as you know this switches the heater off when it gets to 11 volts to protect the batteries.

I have spoken to Purefreedom and all they can suggest and advise is to put the batteries on trickle charge every night.

Just wondering if you have experienced the same and how you manage to keep your system charged up for every day use? also do you keep your system in the frost stat setting each night, as this will take a drain on the batteries when not cleaning windows.

Any advise on your set up would be very helpful

Simon

[Steve CM]

I have had no issues simon

A couple of times it has said low battery when working but after driving round between houses it has charged itself up ok.

Purefreedom did tell me that i may to use a trickle charge every now and then to give the batterys a boost but so far not needed to

[dd]

I have the 1 man isothermal retro fitted by Pure Freedom in December. They put in 2 110amp leisure batteries which also run the pump for the wfp system and is on a split charge relay.

I tend to work in one area all day so not much charging between jobs and I find if I use the hot water unit it really hammers the battery. It also tends to drain the van battery. They did tell me the 3 batteries were linked but I thought that was only for charging purposes. The van battery is 4 months old.

Next time round I think I would go for the Fogwash as it is about 2k less and cheaper to run and I think more simple.

[trevor perry]

hi simon
  i have the purefreedom set up and found the frost sat does drain the battery a little, i usually trickle charge the batteries once a week and havnt had the problem since.

[simon w]

Cheers Guys.

I've got a good split charge relay and two new batteries, so I guess the only answer now is to put them on a trickle charge at the weekends and if necessary in between during the week.

I was a bit concerned this morning as when I went out to the van at 7am the volt meter on the flow masters was showing 11.7 volts I think because the frost stat had been kicking in during the night due to the temps dropping below 2 degrees, however the guys did two conservatory treatment cleans and a care home using the heater and recon the voltage was staying around 12.5 volts which I believe is quite good?

I may adjust the frost stat so it comes on at lower than 2 degrees so as to save battery life during the night also the anti freeze in the heater is good down to -20 degrees so I'm guessing in this part of the UK at this time of year there's no need to worry about frost damage to the heater which seems very well insulated in it's cabinet as well.

Thanks for your input guy's it was very helpful on the whole I think the PF heater has been a great investment, the guys reckon the hot water cut through the dirt and really speeded up the job with the conservatory cleans which were heavily covered in algae

[easycleaner]

Got the pure freedom hot system last year. They said I might need to trickle charge at night.
I found that if you if you charge over night we dont have any probs. Basicly if you dont do much driving and do a days work you cant put hours of work use back into the battery with only an hour or two of charging from the van.
Its a maths thing!
Mart

[simon w]

I've now adjusted the frost state to come on at 0 degrees and off at 0 degrees instead of 2 deg and 4 deg. and will charge batteries for 11 hours over the weekend.

What temperature do you guys run the heater on? at the moment I'm using it on full heat 9kw until up to max heat then reducing it once the heater has achieved full heat.

Not had any problems today and been working with hot on every job

Simon

[Spruce]

Cheers Guys.

I've got a good split charge relay and two new batteries, so I guess the only answer now is to put them on a trickle charge at the weekends and if necessary in between during the week.

I was a bit concerned this morning as when I went out to the van at 7am the volt meter on the flow masters was showing 11.7 volts I think because the frost stat had been kicking in during the night due to the temps dropping below 2 degrees, however the guys did two conservatory treatment cleans and a care home using the heater and recon the voltage was staying around 12.5 volts which I believe is quite good?

I may adjust the frost stat so it comes on at lower than 2 degrees so as to save battery life during the night also the anti freeze in the heater is good down to -20 degrees so I'm guessing in this part of the UK at this time of year there's no need to worry about frost damage to the heater which seems very well insulated in it's cabinet as well.

Thanks for your input guy's it was very helpful on the whole I think the PF heater has been a great investment, the guys reckon the hot water cut through the dirt and really speeded up the job with the conservatory cleans which were heavily covered in algae

Hi Simon,

I'm not an expert on this, but I would have thought that each of your leisure batterys, ie the one to run your heater and the one to run your WFP system must be separate and each must have it's own split charge relay wired into the van's electrical system.

By linking the two batteries together via a single relay, the flatter battery of the 2 will drain the other. This is why I can see the sense in the suppliers advice to run the heater off it's own stand alone battery and charge it every couple of nights.

Spruce

[simon w]

Cheers Guys.

I've got a good split charge relay and two new batteries, so I guess the only answer now is to put them on a trickle charge at the weekends and if necessary in between during the week.

I was a bit concerned this morning as when I went out to the van at 7am the volt meter on the flow masters was showing 11.7 volts I think because the frost stat had been kicking in during the night due to the temps dropping below 2 degrees, however the guys did two conservatory treatment cleans and a care home using the heater and recon the voltage was staying around 12.5 volts which I believe is quite good?

I may adjust the frost stat so it comes on at lower than 2 degrees so as to save battery life during the night also the anti freeze in the heater is good down to -20 degrees so I'm guessing in this part of the UK at this time of year there's no need to worry about frost damage to the heater which seems very well insulated in it's cabinet as well.

Thanks for your input guy's it was very helpful on the whole I think the PF heater has been a great investment, the guys reckon the hot water cut through the dirt and really speeded up the job with the conservatory cleans which were heavily covered in algae

Hi Simon,

I'm not an expert on this, but I would have thought that each of your leisure batterys, ie the one to run your heater and the one to run your WFP system must be separate and each must have it's own split charge relay wired into the van's electrical system.

By linking the two batteries together via a single relay, the flatter battery of the 2 will drain the other. This is why I can see the sense in the suppliers advice to run the heater off it's own stand alone battery and charge it every couple of nights.

Spruce

I've had both batteries on trickle charge over the weekend, so should be OK for a few days now at least.

Do you guys run your heater at full heat 9kw? noticed a big difference when two pumps are being used! whats the average voltage reading on your Flowmasters during the day?

[charlie2]

Hi i run solar charge on my wfp aswell