The only function of the end line switch is to start the boiler. They are
used if the boiler is wired for "cold start" Some boilers, like ones with
hot water coils built in, are "maintained temperature" boilers and use a
triple aquastat relay, which has a low temp cut in and a high temp cutout,
so they maintain a tank of 180 degree water



"bill" wrote in message
ps.com...
Will try and keep short. Came home to a stone cold house. It being only
second year in house and not even remotely familiar with system i
called in outside help. He said my valve switches were bad, honeywell
recall had expired, and said he could not replace just switches, but
entire valve's. Total over $300 parts alone.

I have access to electronics so i ash him to somehow wire me a bypass
if possible. He did and that works. I have replaced switches but he
wired bypass when i was not looking, and dont want to call him back out
for $85 and a 2 minute job. If im am not mistaken, he wired one
thermostat directly to power.

Link to pic's and explained.

http://home.comcast.net/~janiebeast/bill.htm

Very first pics shows 2 valves the way they are wired NOW after bypass.
Valve on left is only one that had any rewiring done on it, thats
upstairs or main, one on left is downstairs and secondary.

Second pic is close up of left valve

Third pic sideways (sorry) but just to show wiring he did, see spliced
red and white wires

Pics 4 and 5 same. He plugged in his bypass to this transformer. I can
switch these back without problem.

The actual question is i have one read and one white wire to reconnect
to left valve, but not sure where to reconnect, can only guess red wire
goes to bottom middle on value, but if thats correct, where does white
wire go???