If you are looking for a Taco SR503 wiring diagram, then you have come to the right place. In this article, we will provide you with a comprehensive guide on how to wire a Taco SR503 switching relay.
What is a Taco SR503 Switching Relay?
A Taco SR503 switching relay is a device that allows you to control multiple heating and cooling zones with a single thermostat. It is commonly used in hydronic heating systems, where water is used as the heat transfer medium.
The Taco SR503 switching relay has three zones, each with its own circulator pump. It also has a priority zone, which is used for domestic hot water or any zone that requires immediate heat. The priority zone takes precedence over the other zones.
Wiring the Taco SR503 Switching Relay
Before you begin wiring the Taco SR503 switching relay, make sure that you turn off the power to the HVAC system. You should also consult the wiring diagram that came with the unit.
Here are the steps to follow when wiring the Taco SR503 switching relay:
Step 1: Mount the Relay
The first step is to mount the Taco SR503 switching relay on a flat surface near the boiler or the HVAC system. Make sure that it is easily accessible and that there is enough clearance around it.
Step 2: Connect the Power Supply
The next step is to connect the power supply to the Taco SR503 switching relay. The power supply should be connected to the L1 and L2 terminals on the relay.
Step 3: Connect the Thermostat
Connect the thermostat to the T and T terminals on the Taco SR503 switching relay. Make sure that you follow the instructions that came with the thermostat.
Step 4: Connect the Circulator Pumps
The Taco SR503 switching relay has three zones, each with its own circulator pump. Connect the circulator pumps to the Z1, Z2, and Z3 terminals on the relay.
Step 5: Connect the Priority Zone
The priority zone should be connected to the B1 and B2 terminals on the Taco SR503 switching relay. This is the zone that takes precedence over the other zones.
FAQ
| Question | Answer |
|---|---|
| What is a Taco SR503 switching relay? | A Taco SR503 switching relay is a device that allows you to control multiple heating and cooling zones with a single thermostat. |
| How many zones does the Taco SR503 switching relay have? | The Taco SR503 switching relay has three zones, each with its own circulator pump. It also has a priority zone, which takes precedence over the other zones. |
| How do you wire the Taco SR503 switching relay? | You should consult the wiring diagram that came with the unit. But generally, you need to connect the power supply, thermostat, circulator pumps, and priority zone to the appropriate terminals on the relay. |
Conclusion
Wiring a Taco SR503 switching relay is not difficult, as long as you follow the instructions that came with the unit. By wiring the relay correctly, you can control multiple heating and cooling zones with a single thermostat, which can save you money on energy bills. If you have any questions or concerns, don’t hesitate to contact a professional HVAC technician.
