If you have a Carrier Infinity FE4A, FE5A, or similar air handler/fan coil and are looking to add a hydronic coil fed by your boiler, you're going to need a Hydronic Relay Kit for the air handler.
The purpose of the kit is to configure the air handler to recognize the hydronic coil as the heat source for the unit, rather than the more traditional electric emergency heat setup. When the thermostat/air handler calls for heat it needs to be able to communicate with your boiler and zone control/pumps to begin circulating hot water. This kit is what's needed to enable that communication.
Carrier used to make a unit, KFAIF0101HWC, that contained all you'd need for the kit, but they discontinued this part back in 2016. The replacement components need to be ordered individually, and I needed to get creative in figuring out one specific element.
This video goes into detail on the purpose of the kit, the parts you'd need, how to assemble everything, how to install it in the system, and how to configure the kit once installed. It's a relatively easy process when you know what you need.
I've set up an Amazon list with all of the parts and pieces you'll need to create this relay kit with replacement components.
www.amazon.com...
The whole thing consists of:
RELAY - CARRIER HN61PC002
RECTIFIER CONTROL - CARRIER HK61EA003
WIRE - 16G STRANDED IN 5 COLORS (RED, BLACK, YELLOW, WHITE, BLUE)
RESISTOR - 270K OHM .5WATT
2 PIN CONNECTOR - WILLWIN 2-PIN 5.08MM PITCH BLOCK
12 PIN CONNECTOR - M
DISCONNECTS - RED 22-16 GAUGE FEMALE CRIMP
MISC - HEAT SHRINK, BLUE WIRE NUTS, SOLDER
Негізгі бет How To Build and Install a Carrier Hydronic Relay Kit for Boiler Heat
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