Do you need an expansion tank with a recirculation pump?
The expansion tank is required for a recirculating (closed) loop. Connect the Thermal Expansion Tank (available at your local plumbing supplier) to the cold water supply line near the water heater. The expansion tank contains a bladder and an air charge.
What is a Recirc line?
A recirculation line is a separate water pipe that runs off the hot-water line from the farthest plumbing fixture back to the water heater. A pump at the water heater moves hot water through the recirculation line. Any cold water in the recirculation line is returned to the heater.
Why is my recirculating pump not working?
Circulator pumps can stop working for several reasons: a blown fuse, bad wiring or a dead motor. Troubleshooting the possible causes in a systematic manner ensures you can find the reason your circulator pump isn’t working so you can get it back up and running as soon as possible.
Do you need a check valve on a recirculating pump?
Whenever a zone connects to the main piping in the recirculation system, a check valve is required. A proper design will have a flow control valve installed at the end of the zone to regulate how much water goes through that zone.
How do you know if you have a bad circulator pump?
Circulating pump not working?
- The water flow pipe isn’t hot despite the pump running.
- A water leak coming from the pump.
- The pump is making unusual noises.
- The pump casing feels hot.
- Some or all of your radiators aren’t heating up.
- You have no hot water.
How can I tell if my hot water recirculating pump is working?
If the circulator pump is on the RETURN side of the heating piping loop (the usual and better location) then you can feel the pipe at the circulator pump – doesn’t matter which side – in or out flow – since if the pump is running the pipe will get warm, then hot if it is successfully moving hot water out of the boiler …
How do you reset a Grundfos pump?
The Auto-reset function can be activated/deactivated by press- ing the on/off button for 5 seconds. Note: When water is consumed, the pump will start and stop automatically, whether the Auto-reset light is on or off.
How do you bleed air from an expansion tank?
- Turn off the valve that auto-fills the system from your cold water line.
- If you have one, open a valve or bleeder on the top of your expansion tank.
- Open a drain valve and drain a suitable amount of water.
- Close drain valve and re-open valve you closed in step 1.
What PSI should my expansion tank be set at?
The recommended water pressure is between 50 and 60 PSI. Thermal Expansion Tanks contain an air bladder which is pressurized with air, and expands and contracts to absorb the expanded water from the water heater. needed.
What is the function of a recirculating pump?
The function of a recirculating pump is to ensure that hot water is always available as close to the consumption point as possible, in order to reduce water waste and to increase comfort. A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = Φ/ΔT x 4200
How is the size of a hot water recirculation pump calculated?
A hot water recirculation pump can be sized for a given system using the following formulas: Water flow qc = Φ/ΔT x 4200 qc = the circulating water flow [m 3 /s] Φ = heat loss from the circulation system [kW]
What is a hot water recirculating pump return line?
This is ideally the return line is used on a traditional hot water recirculating pump design. The advantage of the dedicated return line is that it creates a perfect loop for the water circulation system. Basically, you will find two types of hot water recirculation pumps – Full Reciprocating Pump system and Recirculating Pump Comfort System.
What is a full reciprocating pump system?
The Full reciprocating pump system involves the erection of an additional pipe for the entire home plumbing system. The system is designed to create a loop from the heater to the fixtures and back again to the heater. If you have any unused hot water in the pipe, it is drawn back to the heater.