It's likely a stupid question, but please bear with me.
My Trane XV95 furnace control board has a HUM terminal and an EAC terminal. I use the HUM terminal (per manual it's 120VAC at 1A max) to power the humidifier via a 24VAC transformer. The HUM terminals feed the 120VAC to primary side of the transformer, and the 24VAC goes to humidistat (Honeywell) and then to water valve. I also use the EAC terminal (also 120VAC at 1A max) to power two inline booster fans in the ductwork via a relay-in-a-box (RIB1C).
It's been a few years, and it works well. One thing on my mind is to protect both HUM and EAC circuits from overcurrent (coil shorting in relay or transformer). Am I over thinking? I can't seem to be able to find 1A, 125VAC fuses that can be used for this even if I wanted to. There are some surface-mount fuses on digikey.com, but they can't be easily mounted. I know I can't use DC fuses.
Does the control board (CNT05160) have fuse protection for these two circuits? please let me know what you think. Thanks.
My Trane XV95 furnace control board has a HUM terminal and an EAC terminal. I use the HUM terminal (per manual it's 120VAC at 1A max) to power the humidifier via a 24VAC transformer. The HUM terminals feed the 120VAC to primary side of the transformer, and the 24VAC goes to humidistat (Honeywell) and then to water valve. I also use the EAC terminal (also 120VAC at 1A max) to power two inline booster fans in the ductwork via a relay-in-a-box (RIB1C).
It's been a few years, and it works well. One thing on my mind is to protect both HUM and EAC circuits from overcurrent (coil shorting in relay or transformer). Am I over thinking? I can't seem to be able to find 1A, 125VAC fuses that can be used for this even if I wanted to. There are some surface-mount fuses on digikey.com, but they can't be easily mounted. I know I can't use DC fuses.
Does the control board (CNT05160) have fuse protection for these two circuits? please let me know what you think. Thanks.
source https://hvac-talk.com/vbb/showthread.php?2222767-How-to-protect-HUM-and-EAC-circuit&goto=newpost
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