DESCRIPTION OF ISSUE:
QUESTION: Since the indirect hot water heater is now connected to the TT terminals on the boiler aquastat, can I leave heating zone 1 as is, also connected to the TT terminals (along with its circulator connected to terminals C1 & C2), or should I totally disconnect heating zone 1 from its direct connection to the boiler aquastat and hook it up with its own separate Honeywell R845A, the same as heating zones 2 and 3 ? Thanks in advance for your advice!
- I have an oil-fired burner with a Honeywell L7224A aquastat, a hydronic heating system with 3 zones (separate circulators and thermostats for each zone) and a coil for the hot water. The coil is shot. (The bolts are too rusted to remove and replace it.)
- I disconnected the coil and added a 45 gallon indirect water heater with its own aquastat and circulator. The water heater aquastat has low voltage "thermostat" wires going to the TT terminals on the boiler aquastat. (The water heater aquastat also has low voltage "thermostat" wires going to a separate Honeywell R8845U relay for the water heater circulator.)
- Originally, heating zone 1 was hooked up directly to the boiler aquastat. The thermostat wires went to the TT terminals on the boiler aquastat and the circulator wires went to C1 & C2 terminals on the boiler aquastat.
- Heating zones 2 & 3 are hooked up (thermostats and circulators) to separate Honeywell R845A relays that connect with the boiler aquastat.
QUESTION: Since the indirect hot water heater is now connected to the TT terminals on the boiler aquastat, can I leave heating zone 1 as is, also connected to the TT terminals (along with its circulator connected to terminals C1 & C2), or should I totally disconnect heating zone 1 from its direct connection to the boiler aquastat and hook it up with its own separate Honeywell R845A, the same as heating zones 2 and 3 ? Thanks in advance for your advice!
Aquastat wiring
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