On Jan 15, 1:20*pm, RBM wrote:
On 1/15/2012 2:12 PM, BM wrote:







OK, a system like yours has a triple aquastat relay mounted on it. It
will have two temperature dials on it, unless it's an electronic
model. In any event, that control maintains the temperature of the hot
water in the boiler independent of circulating control. Each of your
two circulators has a relay which sends 120 volts to it's respective
circulator when that circulator's thermostat calls for heat. If you
turn up and down each thermostat, you should hear it's relay click on
and off. Don't go by the hum of the circulator as that can be
deceiving. Check for each relay clicking on and off as you raise and
lower the thermostats.

RBM, *there is a Honeywell box on the from of the system. *if i take the
cover off there are two dials insied. *One says HI and set on 180 *the
other says LO and set on 160. * I remeber when the guy put the system in he
told me those dias control the water temberature coming out of the faucet.
Other than that I dont see anything that controls the temperature for the
circulating pumps.

He is correct, those dials maintain the temperature of the boiler water.
The circulators for the heating zones are controlled by your room
thermostats, through switching relays. These relays can be individual
boxes about 4" x 4" or multiple relays can be inside one box. If you
trace the cable from each circulator, those cables should be coming from
these boxes. This is also where the thermostat (low voltage) wires are
connected.- Hide quoted text -

- Show quoted text -

It seems like the circulator pumps are not running. You need someone
to move the room thermostats up and down while you are at the pump.
When the pump is not running, one side (from the boiler) should be
much hotter than the other side( to the baseboard heaters). When the
thermostat is raised to increase the room temperature, the relay
should operate and the circulating pump should get 120V to start the
pump running. The pump should run until the room thermostat gets hot
enough and then the circulating pump should stop. As soon as the pump
starts, within less than a minute or so, hot water should be
circulating to the baseboard units and they should start to heat up.
Both sides of the pipes to the circulating pump should be hot if the
water is circulating. DO you have a voltmeter to check the voltage at
the pumps. Pumps humming could be their normal sound, or the same
sound could indicate a damaged pump. But it is strange that both
pumps would go bad, if you have two pumps, or that both valves, if you
have only one pump and two zone valves would go bad at trhe same
time. If you have two volves and only one pump, I would bet money on
the pump. This is so basic that I believe you should get a handy
neighbor in to help you.