BCM Community
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
BCM Home
Forum
Help
Forum Rules
Search
Login
Register
BCM Community
»
Bus Discussion
»
Bus Topics ( click here for quick start! )
(Moderator:
Nick Badame Refrig/ACC
) »
Heating question
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: Heating question (Read 4007 times)
ttomas
Full Member
Posts: 128
Heating question
«
on:
November 24, 2007, 10:45:00 AM »
Hello folks, I just finished tying in my heat system to the bus and I can not get any circulation.
Facts: mc9,6v92ta, 1983. I removed the intire stock ac and heat.
I tied in the webasto system (minus the heating unit which I will add later)
I removed the stock heater radiator and tied the new system of hoses into the existing lines on each side where it tied to the radiator.
Is there a fault in tying it in here? Thanks tom
Logged
Dallas
Guest
Re: Heating question
«
Reply #1 on:
November 24, 2007, 11:18:04 AM »
Did you turn the valves on back by the engine and bleed the air out of the top of the engine?
IHTH
DF
Logged
ttomas
Full Member
Posts: 128
Re: Heating question
«
Reply #2 on:
November 24, 2007, 12:28:57 PM »
Dallas, that would be something I failed to do however I did double check and they are opened. Thanks, Tom
Logged
Nick Badame Refrig/ACC
1989, MCI 102C3, 8V92T, HT740, 06' conversion FMCA# F-27317-S "Wife- 1969 Italian/German Style"
Global Moderator
Hero Member
Posts: 4973
Nick & Michelle Badame
Re: Heating question
«
Reply #3 on:
November 24, 2007, 12:37:52 PM »
Hi TT,
As Dallas says, Bleed all the air from the system, then do it again.... and again.....
Also, How much have you restricted from the lines from the 1 1/2" heat pipeing?
Let us know
Nick-
Logged
Whatever it takes!-GITIT DONE!
Commercial Refrigeration- Ice machines- Heating & Air/ Atlantic Custom Coach Inc.
Master Mason- Cannon Lodge #104
https://www.facebook.com/atlanticcustomcoach
www.atlanticcustomcoach.com
DrivingMissLazy
Hero Member
Posts: 2634
Re: Heating question
«
Reply #4 on:
November 24, 2007, 01:07:55 PM »
You will also have to bleed the air out at the heater/defroster.
Richard
Logged
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body. But rather to skid in sideways, chocolate in one hand, a good Reisling in the other, body thoroughly used up, totally worn out and screaming: WOO HOO, what a ride
rcbishop
Jr. Member
Posts: 82
Re: Heating question
«
Reply #5 on:
November 24, 2007, 04:53:05 PM »
Also, is your Webasto pump at the lowest point of the entire system? Needs to be....and I found out the difficult way that it is a fine line. Lowest point. Period.
Then bleed, bleed, bleed and probably do it again....as was stated above. Critical.
FWIW
RCB
Logged
Tony LEE
Sr. Member
Posts: 495
Re: Heating question
«
Reply #6 on:
November 24, 2007, 05:10:24 PM »
Remove the original water control valve as well?
Logged
Tony LEE
MC8 Australia
Photo Album at
https://picasaweb.google.com/114611728110254134379
Trip map
https://spotwalla.com/tripViewer.php?id=5cfc50ef7ac22ca2d&hoursPast=1400&fillFactor=100
captain ron
Guest
Re: Heating question
«
Reply #7 on:
November 24, 2007, 08:01:36 PM »
How do you go about bleeding air from your cooling system?
Logged
DrivingMissLazy
Hero Member
Posts: 2634
Re: Heating question
«
Reply #8 on:
November 25, 2007, 05:49:17 AM »
Quote from: Charley Davidson on November 24, 2007, 08:01:36 PM
How do you go about bleeding air from your cooling system?
Cooling system or heating system?
Richard
Logged
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body. But rather to skid in sideways, chocolate in one hand, a good Reisling in the other, body thoroughly used up, totally worn out and screaming: WOO HOO, what a ride
captain ron
Guest
Re: Heating question
«
Reply #9 on:
November 25, 2007, 06:41:20 AM »
In his case I believe they are the same. In my case the engine cooling system and my heating system is or will be one and the same. But tell on both since they are evidently different methods.
Logged
rcbishop
Jr. Member
Posts: 82
Re: Heating question
«
Reply #10 on:
November 25, 2007, 08:04:54 AM »
In my case...I started with the Webasto pump (which happens to be a very large truck pump), the very lowest point in the system. Open the bleeder valve until a steady stream of coolant runs. Then I started at the front of the coach, which is closest to the midships-engine configuration that I have. The Cummins manual says to run the rpms to 1500 during the process; open the heat exchanger drain valves and repeat the process described at the pump. Do the same for each heat exchanger in the coach until each, and every exchanger runs a stream of coolant.
Repeat, repeat repeat, till all signs of air i(bubbles in the stream) are gone. I caught the collant in containers placed under each heat exchanger drain tube. Little to no waste. Be sure the radiator cap is off and the radiator is filled.during the entire process. Time consuming, but well worth the effort. You may need to do this more than once during the season depending on use of your coach and loss of coolant thru other circumstances.
FWIW
RCB
'64 Crown Supercoach (HWC)
Logged
bobofthenorth
Hero Member
Posts: 2612
Re: Heating question
«
Reply #11 on:
November 25, 2007, 08:14:18 AM »
Bleeding tip - make sure you set the rads up so it is convenient to bleed them. In my case that means a T fitting close to the rad with a 1/4 turn valve on one leg of the T & a short length of hose to direct the fluid to a container. And you want the bleed point at high spots in the system so that the air will actually rise to the bleed point. These rads are often in spots where they are "less than accessible" so take some time to set them up for future bleeding convenience.
My rads had built in bleed screws which apparently was all the previous owner ever used but they were a serious PITA not to mention messy so that was one of the things that got upgraded early on.
Logged
R.J.(Bob) Evans
Used to be 1981 Prevost 8-92, 10 spd
Currently busless (and not looking)
The last thing I would ever want to do is hurt you.
Its the last thing but its still on the list.
ttomas
Full Member
Posts: 128
Re: Heating question
«
Reply #12 on:
November 26, 2007, 01:07:23 PM »
Thanks to all for the advice. I ended up pumping water through the lines with a 12volt pump to get the air out of the system. Air was the problem. Thanks again. tomas
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
BCM Community
»
Bus Discussion
»
Bus Topics ( click here for quick start! )
(Moderator:
Nick Badame Refrig/ACC
) »
Heating question
SimplePortal 2.3.7 © 2008-2024, SimplePortal