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Weil Mclain Ultra 230 Series 1 Boiler - Outdoor Temp Sensor
I'm thinking of adding the outdoor temperature sensor to my Weil Mclain Ultra 230 boiler. The only question I have is that this unit, when wired, was not wired to take advantage of the DHW connections. We have an indirect water heater in which a coil runs through the center of the unit with heated water from the boiler that heats the water in the tank. It is wired as a zone similar to our 2 air handler zones and 2 radiant heat zones.
I am curious if adding the outdoor temperature sensor will affect the heating of the water in the water heater as the outside temperature is monitored by the unit and the fire rate and boiler water temp is modulated. This is supposed to make the unit more efficient than it already is and I have already set the parameters as required (P4 thru P8).
We have 2 Taco relays, one for each radiant heat zone (2 zones total). These 2 relays are wired into a 3rd, larger relay that contains 1 green and 4 red LED's. Each of the 4 red LED's applies to a zone. 1 for the 1st floor air handler, 1 for the 2nd floor air handler, 1 for either radiant zone when 1 or both Taco relays for the radiant heat are calling, and the last LED is for the DHW.
I did note in the manual that when the actual DHW aquastat connections for this boiler are used, it is a priority setup, meaning that when the water heater is calling, space heating is disabled. Probably why it was not wired with that configuration and instead the water heater was wired as just another zone.
Any input would be greatly appreciated!