Mr Blint
New Member
Yesterday we replaced our badly leaking indirect hot water heater with a Burnham US Boiler Alliance LT, the one with the thermoplastic lining. No sacrificial anode, no corrosion issues. We live in PA, US Boiler is located in PA, and we're shopping local.
The old tank had a Honeywell aquastat and the Alliance LT comes with an electronic TPI with a little motherboard inside. There's no immersion well accessible from outside the unit, just a little wire a few inches long that sticks out the side.
The installers were pretty good plumbers but not electricians. They figured all they'd have to do is move the two wires from the Honeywell aquastat over to the Incoming 24V power connection terminals and call it a day. They did so. The TPI's green light flashes, indicating a call for heat, but the zone valve doesn't open and the pump doesn't come on. The pictures of the TPI in the manual all show four wires not two. There are two additional terminals for Outgoing 24V wires to relay or zone valve.
We have two Taco 3-wire zone valves (one zone for heating the house, one zone for heating the water) on a sideways "T" pipe setup up (├ ) with a single Taco pump pushing water towards the ├ . Up goes to heating the house, down goes to hot water tank. There is a transformer sitting on top of the boiler, and a mares-nest of wires connected together with nuts.
Do I understand correctly from the attached wiring diagram that we need to run two additional wires back to a relay and also connect the Pump terminal on the TPI to the 24V red "in" on the TPI? I should probably hire an electrician and have him move that tangled mess of wires to a relay?
Thanks in advance for helping me to understand how this should be wired up.
The old tank had a Honeywell aquastat and the Alliance LT comes with an electronic TPI with a little motherboard inside. There's no immersion well accessible from outside the unit, just a little wire a few inches long that sticks out the side.
The installers were pretty good plumbers but not electricians. They figured all they'd have to do is move the two wires from the Honeywell aquastat over to the Incoming 24V power connection terminals and call it a day. They did so. The TPI's green light flashes, indicating a call for heat, but the zone valve doesn't open and the pump doesn't come on. The pictures of the TPI in the manual all show four wires not two. There are two additional terminals for Outgoing 24V wires to relay or zone valve.
We have two Taco 3-wire zone valves (one zone for heating the house, one zone for heating the water) on a sideways "T" pipe setup up (├ ) with a single Taco pump pushing water towards the ├ . Up goes to heating the house, down goes to hot water tank. There is a transformer sitting on top of the boiler, and a mares-nest of wires connected together with nuts.
Do I understand correctly from the attached wiring diagram that we need to run two additional wires back to a relay and also connect the Pump terminal on the TPI to the 24V red "in" on the TPI? I should probably hire an electrician and have him move that tangled mess of wires to a relay?
Thanks in advance for helping me to understand how this should be wired up.
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