Quote:
Originally Posted by donk.
Tap the recirc pump with your hand to make sure it's not hot (burn), then put your hand on it, it should be vibrating, during a heat call to at least one of the zones.
There should be an arrow on the red body of the volute assembly (back of pump), make sure this is pointing up
Pipe temperature on the discharge of the pump, and coming out of the boiler, should be similar, assuming the pump is on
Depending on how the thermostat is set up, it may very well be set up for an outdoor reset system.
Colder day = hotter supply
Summer day = probably 0 output
In other words, you will never feel hot piping, unless it's -10C outside.
Above is an assumption
Edit: what is the pressure of the system? Gauge on bottom left of boiler
Are there any heating zones above the height of the boiler? (2nd / 3rd floors)
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The arrow is pointing up.
I have the thermostats in the houses cranked and the zone control manual overrides are loose (which I assume means they are working and hitting the end switch to call for heat?) and there's no noise or hum out of the pump. The pump itself is warm and I have tested that there is power going to it. The pump itself is warm, not hot. Can't tell if it's supposed to hum or whirr.
The pipe is cool/warm at/from the t-junction, past the pump, and into the zones. Is it normal to have the hot water run into a T and mix with the cold/return?
The upstairs is definitely cooler than downstairs. Maybe the pump is on its last legs?
Pressure is about 18PSI (picture attached).
