| Author | Message | ||
| Barry McCully (Turtle)
Registered Member Username: Turtle Post Number: 17 Registered: 8-2007 Posted From: 24.89.235.12 Rating: N/A |
Want to shut the heat off for the summer I'm thinking that the two valves I close one inside the right hand engine compartment and the other one under trap door in floor? | ||
| Nick Badame Refrigeration Co. (Dnick85)
Registered Member Username: Dnick85 Post Number: 223 Registered: 2-2006 Posted From: 75.196.57.6  Rating: N/A |
Hi Barry, You only need to close one valve to stop the flow. I use the valve on the right hand side of the engine. Good Luck Nick- | ||
| JR Lynch (Njt5047)
Registered Member Username: Njt5047 Post Number: 242 Registered: 7-2006 Posted From: 69.132.233.230 Rating: N/A |
The only reasons to close the upper valve would be if pulling the engine or a water leak develops in the HVAC system. JR | ||
| Tony LEE (T_lee)
Registered Member Username: T_lee Post Number: 31 Registered: 11-2007 Posted From: 212.17.236.90 Rating: N/A |
if you still use the OEM air-conditioner with the original mode of temperature control, shutting the hot water off will mean the temperature will uncontrollable. | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1296 Registered: 12-2000 Posted From: 76.68.123.55  Rating: N/A |
And no heat from the defroster for clearing fogging on a rainy day, with a valve closed. happy coaching! buswarrior | ||
| JR Lynch (Njt5047)
Registered Member Username: Njt5047 Post Number: 244 Registered: 7-2006 Posted From: 69.132.233.230 Rating: N/A |
Does the AC control the valve in the upper front RH bay ceiling? My AC is long gone, but there's a valve in the front that doesn't do anything as far as I can see. There's no heat regulation. It's on or off. And that how I have to use it. That big valve has to do something? Is it wired to the resistance switch in the dash? That's one item (among many) that I'm not familiar with. Don't know it's actual purpose. Anyone? | ||
| George M. Todd (George_mc6)
Registered Member Username: George_mc6 Post Number: 450 Registered: 8-2006 Posted From: 207.231.75.253 Rating: N/A |
Jr, If the "big" valve in the front has a wire on it, it is the heater control valve. If it is the same as mine, it is full on or off, only. The "resistance switch in the dash" technically a potentiometer, doesn't control the valve directly, it tells the controller what temperature you want. The controller turns the valve on & off to regulate the temp. Your bus may have a heat light, which lights when the control opens the valve, in normal operation, it will blink on and off, depending on the temp. Does this help? Good luck hunting, George | ||
| JR Lynch (Njt5047)
Registered Member Username: Njt5047 Post Number: 249 Registered: 7-2006 Posted From: 70.61.104.58 Rating: N/A |
Thanks George. That helps. The controller has a wire and solenoid on it. It also indicates that the unit isn't working as designed. I've head that NJT disconnected the rheostats? I don't know why they would do this. Got major heat or no heat. It doesn't cycle on its own. Cannot run it for more than a few minutes. Even when in the 20s outside. May remove all that crap and install a couple smaller heaters above the floor. One front and one rear. And keep the drivers heat. It works good. JR | ||
| George M. Todd (George_mc6)
Registered Member Username: George_mc6 Post Number: 453 Registered: 8-2006 Posted From: 207.231.75.253 Rating: N/A |
JR, A guess would be that they wanted all of their buses to run at the same temperature all of the time? If so, there will be a resistor connected between the two terminals for the rheostat. Don't take this as gospel, I'm 3 models behind you, and away from my shop manual, but I seem to think that the water valve is normally open, (energized to close.) If so, could just be a wire off. ???&* G | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1305 Registered: 12-2000 Posted From: 76.68.134.96 Rating: N/A |
Transit operations are notorious for taking the heat control away from the pedal pusher sadists that some of their drivers have become. Stock heat is hard to beat going down the road. Tons of fresh warm air into the coach. Do a little forensic work and see if you can locate where they chopped in their permanent fix and restore it. happy coaching! buswarrior |