Operation of hot air blower
#1
11-30-16, 03:52 AM
Operation of hot air blower
is there an in depth article/explanation on exactly how a delayed fan control like the Honeywell ST9103 or other similar controls work?
#2
11-30-16, 04:53 AM
The spec sheet describes most of how it operates. https://customer.honeywell.com/resou...s/69-0771b.pdf
#3
11-30-16, 05:54 AM
thanks, that does explain it well, however I have a separate burner control box (R8184) and the thermostat terminates to it (and not the S9103) as does the cad cell, so I'm trying to figure out how the S9103 get the indication the burner has stated so as to start the timing sequence, also I have a manual switch that does nothing, I thought it should turn on the blower (the blower fan works when hot wired
#4
11-30-16, 06:23 AM
Member
That's a good question,it appears that everything should through the ST9103 first,is this a new install,where is this manual switch?
#5
11-30-16, 06:38 AM
the manual switch is not physically on the board but wired to it, it's definitely a 120 vac not 24 vac. The way this is all wired with the separate control bow is the timing sequence starts when the orange 120 vac that connects the S9103 and the control box, sort of the equilalent of energizing terminal W becomes live
#6
11-30-16, 08:58 AM
Group Moderator
If supplying 120v to the timer board starts it timing then there must be a jumper across R and W where a stat would connect.
Not what I would consider a proper use of the timer control.
Not what I would consider a proper use of the timer control.
#7
11-30-16, 09:16 AM
I agree, the best I can make out is that the board is limited pretty much to just the limit switch and fan timing which is 60 second delay after burner starts and a 120 second continuig run after burner stops. And now it won't turn on the fan at all, but there is a full time 120 vac present on the board which feeds the burner control voltage and that energizes the orange 120 vac lead coming out to the pump motor, ignition, and oil valve upon thermostats request activated by 24 vac loop
