Where is my circulator

Certainly by the time the thermostat is satisfied you would expect that return line to be quite warm. If it's not the system may be airbound. I just turned my furnace on today. The return from outdoor furnace is not getting the copper pipe too hot to the touch despite the furnace being at the right temperature. Could this be a circulator pump, or something else? All getting proper voltage and confirmed working.

This is a new behavior, and was not the case before. Even when I power down the system, wait 30 seconds or even 2hrs, when reenergized, 10 seconds of silence, C1 indicator light goes on, followed by a relay click, and circulator turns on.

This is with no TT demand and BT above limit. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator.

Apologies for the delay. Just ask us! Search the InspectApedia website. Comment Form is loading comments Hoffman is a technical advisor with more than 30 years experience in the heating field. Raypak is a Rheem company that provides hydronic heating boilers for residential, pool, and commercial use. Raypak can be contacted at for technical support or for assistance in selecting the proper heating equipment for a specific application.

Rheem Corporation is a manufacturer of water heaters and heating equipment including Ruud heating and cooling products. National Fuel Gas Code Z Service Alerts Get details on major service advisories for all routes.

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Previous Post Boiler grant scheme: Are you eligible for a free new boiler? Next Post What is a central heating Powerflush? Andy Floyd "Alexa, who is Andy Floyd? Next Post. Leave a Reply Cancel reply Your email address will not be published. Recent Posts. Related posts. Gas central heating guide How much does a central heating installation cost? Want to ensure that your home is always running smoothly? Get cover through HomeServe. Facebook Twitter Youtube Instagram Pinterest.

Privacy and Cookies Read our Disclaimer. Login to your account below. Forgotten Password? Fill the forms bellow to register. All fields are required. Log In. Retrieve your password Please enter your username or email address to reset your password. This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy. When the thermostat calls for heat in a particular building area, the thermostat switch causes the zone valve to open, to permit hot water to flow through that zone.

When the zone valve is fully open, an "end switch" inside the valve tells the heating system's circulator to begin operating, causing hot water to flow through the zone. Typically heating systems using zone valves will have two or more zone valves usually but not always located close to the heating boiler and a single circulator pump usually located on the return end of the hot water piping close to the heating boiler.

Circulator relays on heating boilers - an older and by some heating service technicians, a preferred method to control the distribution of heat to individual building areas uses a individual circulator pump to force heating water through each individual heating zone piping.

This system too is usually found on hot water baseboard heating systems. Two or more circulator relay switches, one relay for each circulator pump, will be installed to turn on and off each heating water circulator if more than one heating circulator is installed. Individual low-voltage thermostats located in the living area will respond to a call for heat by switching on the circulator relay which in turns on the V circulator pump.

Air exit tanks on heating boilers and circulator pump mounting location - some heating boilers use an air exit tank mounted on the hot water header above the heating boiler to combine the function of an Expansion Tank with the Air Bleeder Valve or air purge valve to rid the hydronic hot water heating system of un-wanted air. Air in the heating system will often rise to a high loop of radiator or heating baseboard piping where it will block the flow of hot water, leading to an air-bound heating system and no heat in some or all of the heating system.

The air exit tank captures and vents unwanted air from its location above the heating boiler on the boiler outlet or supply side.

When an air exit tank is used instead of a simpler expansion tank at a heating boiler, the boiler manufacturer may specify that the circulator pump be mounted on the boiler outlet side to improve the function of this device. Thanks to Wayne Hoffman , technical advisor for Raypak, a Rheem company that provides hydronic heating equipment, for this detail.

National Fuel Gas Code Z Catalog XHO Reprinted Instructional Technologies Institute, Inc. Brumbaugh, ISBN v. Macmillan Publishing Co. Excellent tips on spotting problems on oil-fired heating equipment. Tel: Email: info carsondunlop. Carson Dunlop Associates' provides extensive home inspection education and report writing material.

The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.