Club 80-90 Forums

Propex whilst driving - yay or nay???

taken from the propex website.

Q. Can the heaters be used while vehicles are moving?

A. Yes, a vehicle in motion flue terminal is available and the heater should be installed and operated in compliance with the relevant regulatory requirements. Use of the the correct VIM bracket ensure compliance with the vehicle in motion test regime.

£35 for the bracket.

http://www.propexleisure.co.uk/shop/veh ... on-bracket

i had a propex in the front of my bay, only heating in van, never had a problem with 1000s of miles driven

with regards to that bracket, i always thought you had to keep the inlet and exhaust far away from each other

mine was a hs2000 and inlet and exhaust were on separate sides of van, im sure the instructions said they had to be a certain distance apart which makes that bracket very odd

a quick google search and the propex hs2000 fitting instructions say

" Note: The combustion air pipe can be terminated underneath the vehicle
making sure the end of it is at least 0.5 metres away from the end of the
exhaust and that they are not pointing directly at each other. Take care to
ensure that both pipes have a slight downward slope to prevent any
possibility of water traps. Make sure that neither the flue or the combustion
air inlet pipe are terminated in an under-floor box section."


so they are supposed to be half a metre apart

Exactly the question I have in mind- on the last install the pipes were 500mm apart- now they sell a bracket to keep them together?!

It does seem crazy to me - I would never advocate fitting a Webasto heater with the inlet and exhaust arranged like that but that bracket is supplied for that purpose by Propex themselves and isn't an aftermarket gizmo.
Odd.

I suppose that whilst in motion, if the bracket was mounted with the holes vertically, it would be OK. They seem to be more concerned with not creating imbalance between the inlet and exhaust pipes whilst in motion though - which is achieved easy enough during installation. Maybe Propex should be posed the question to ascertain their reasoning.

Where did that post above this go??? Went to re-read it and it had disappeared.

Sorry i wanted to E D I T it.Basically what i said was wouldn't the exhaust fumes be sucked straight back up the inlet pipe?

Hmm why has the word E D I T come out in capitals,i typed it in lower case.

10 thumbs night tonight?

I'll give them a call, they'll be correct I'm sure but just seems odd!

R0B wrote:Basically what i said was wouldn't the exhaust fumes be sucked straight back up the inlet pipe?

If the exhaust is the rear outlet then no when the vehicle is in motion.
I don't think that the intake of exhaust would make much difference to the combustion in the heater.

No problem on the move. Use mine every day in the Winter. However, one of the technicians advises that the inlet pipe be rerouted so its sucking air from the interior rather than outside. This then means the Propex isn't having to heat up freezing cold air continually, with less gas consumed and a faster-warmed interior. This all makes a lot of sense on overnight stays and puts a lot less demand on your leisure battery with reduced fire-up cycles.

Remote control has proved to be a real help too when door locks get frozen up or windows covered in ice. Not yet had to scrape windows even when the rest of the street have had to.

Finally, you must switch the heater off when driving into a forecourt to top up on fuel.

CovKid wrote:However, one of the technicians advises that the inlet pipe be rerouted so its sucking air from the interior rather than outside.

That makes sense.

although technically you should not have the gas supply switched on when moving ... not that anyone does