Roth 1050 Controller to Honeywell AQ25244B
Boiler controllers can be very intimidating, especially if you do not deal with the same controller all the time. To make matters worse we had a burnt out Roth 1050 controller (Tekmar) that provided zero information on the installers custom settings. The Roth #1050 was manufactured by Tekmar, Tekmar was a leading manufacture and provider of boiler controllers. That was until the industry they provided controllers to caught up to their technology and started to produce their own controllers at a much more reasonable cost.
After removing the circuit board from the housing you can see under the blue capacitor a burnt spot, now in some cases you can have these boards repaired, unfortunately this board was beyond repair. And the very sad part is these boards are becoming scarce and very expensive. Our solution was to move to a Honeywell AQ25244B controller with a AQ25744B expansion panel. Honeywell is less expensive and readily available.
Honeywell AQ25244B controller
Not only would the Honeywell controller replace the the boilers Roth 1050 controller it would also replace the 2 Taco zone controllers that where on the system as well.
We installed the Honeywell AQ25244B controller in a more accessible area for the home owner as well as for the service technician. Because the new controller did the task of 3 components all the wiring had to come back to this location.
Boiler System Back Up And Running
Once the new Honeywell controller is installed we still have a few hours left configuring the system and to make sure the system is working correctly.
Bradford White combi-core
Bradford White combi-core not heating
Every once in awhile you come across a good install, but poor design. Here we have a Bradford White combi-core (Boiler) hwt. These tanks heat both the domestic and hydronic water without mixing the two. The first thing I look for when I'm called out on a no heat boiler call is water pressure, and in this case there was no gauge. Not only was there no gauge...there was no pressure relieve valve. I determined there was massive amounts of air in the system, the pressure regulating valve was shot (no water coming in), and their expansion tank was faulty.
What we replaced and added
I replaced the expansion tank, replaced the cheap pressure regulator valve, added a pressure relieve valve and pressure gauge. Now if they ever have issues again with their Bradford White combi-core at least the tech can see if there is pressure in the system ... and if the pressure gets to high it has a place to go. I also found a faulty Wirsbo zone valve, and of course replaced it as well.