Heating Help

Seems like

@ March 13, 2010 8:24 PM in Just curious about atmospherics,,,,

"Up here" the TSSA is trying to get us to stop using draft hood appliances. If you factor in the cost of closing in a room, might as well go direct vent, eh Dave? ;)

Sorry

@ March 1, 2010 7:48 PM in A puzzler

I didn't get back here sooner. I spent some time over a coffee with a couple of York guys in my area and finally got this sorted out. There's a DIP switch on the main circuit board that is supposed to be labeled "ZONE-YES/NO". Well the switch was there but the wording was not. Works like it was designed to now.  Thanks 

Joe

Still workin on it

@ February 16, 2010 6:54 PM in A puzzler

I had to abandon this project for a day or 2. I will get back asap to get you some #s  sir.

I left the system running on 1 stat and as the zones default open, it works OK.

I  find it odd that when the furnace fires on a no heat call it will overshoot the stat by 3-4 degrees. The owner said he noticed this occasionally in the past but never gave it much thought.

I'm the guy who dropped the ball by not researching the furnace further before installing the new duct and zone system. Its just not something I would have ever expected to come across.

THX joe

A puzzler

@ February 13, 2010 10:52 PM in A puzzler

Firstly...I've been lurking this site for a long while and am amazed at the wealth of knowledge here. I've got 20+ years in the trade and cant believe how little I know.
I have a situation that I can't figure out.
 This week I installed a 3 zone system on an existing furnace using a Robertshaw Simline Classic zone control (I've used this dozens of times with great success).

All went well until the customer called me and said that the furnace
was overshooting the t-stats by 2 or 3 degrees.This was unusual. I spent
a couple of hrs observing and was surprised to see a 4-5 min fire after
the t-stat was satisfied.(I disconnected everything, jumped R & W, fired the burners,
removed the jumper....gas valve remained open). I called York tech
support and was told that it was either a sticky gas valve or faulty
board. Tested the gas valve, OK. Board is doing everything as asked so
it seems OK. (I don't always trust Tech support but that's another story)


After further online research I fount this info @ Johnston controls{York}:



"York MODELS: PC9*DH

UNLIKE CONVENTIONAL SYSTEMS, THE

WALL THERMOSTAT DOES NOT SIMPLY TURN THE FURNACE ON

AND OFF. THE FURNACE CONTROL CALCULATES THE DEMAND

AND MAY CONTINUE TO FIRE THE FURNACE DURING PORTIONS

OF THE THERMOSTAT "OFF" CYCLE"


I said to myself "what the heck" now I have a perfectly good zone system and a perfectly good furnace that wont co-operate.


Any suggestions as to how to remedy the problem?