Taco 2 Zone Switching Relay Troubleshooting

When zone 2 is not switched to priority all zones will operate independently.

Taco 2 zone switching relay troubleshooting.

Zone 2 power zone 1 zone 3 zone 4 led indicators zone 4 priority off on priority four zone switching relay 120 vac circulators zc input 120 vac isolated zone 1 zone 2 zone 3 zone 4 zone1 zone2 zone3 sr 504 4 fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp xxrwrwrwrw end switch thermostats 24 vac 120 vac priority zr hhnhnhnhnh nh zone4. Work with 2 3 or 4 wire zone valves. It comes with assembled dimensions of 7 in. Taco zone control product information switching relays product no.

Description sr501 1 zone switching relay sr501 845rp 1 zone switching relay replacement pc board for honeywell r845 ra89a ra832 or comparable relay sr502 2 zone switching relay with priority sr503 3 zone switching relay with priority sr504 4 zone switching relay with priority. I have a taco sr502 2 zone switching relay wiring configured as cold start boiler application and a 501 switching relay 2 zones 1 heat 2 domestic hot water side arm issue no hot water boiler won read more. This happened once before and i turned the boiler off at the breaker turned it back on and then reset the boiler. This is the taco zone valve body sometimes this part of the zone valve fails.

For information on taco s switching relays sr including catalog sheet instruction sheets visio. I have a taco sr506 switching relay that won t turn on. The 2 problems i have run in to are. Whether you re looking for switching relays zone valve controls priority zoning circulators or fan controls taco has everything you need.

This is what the bottom of the taco zone valve power head looks like notice the two black pins they go into the slots on the taco zone valve body just line them up and turn 1 8th a turn and the head is replaced. They are powered by the switching relay with just 2 wires r w.