| Warranty: | 3 Year |
|---|---|
| Material: | Bronze |
| Application: | Heating |
| Type: | Pump Part |
| Used With: | 003 Series |
I really think you are stuck with a complete or at least partial drain down.. The pump should have a S/O valve before and after. Add the second valve after the drain down. You'll need to drain enough water away if you will be soldering any joints. The water in the system will drain until the height of the pump is realized. Good luck.
Not much other than attach a hose in order to direct water to a floor drain or outside. Install a second isolation valve while system is down to replace the cartridge. you are victim of a bad original installation.
I'm no expert but here is my opinion. I have used the Taco pump for the last 12 years (6 years in one home and 6 years in my present home.) replacing the cartridge one time in each. I believe the pump will normally be as hot as the highest water temp from your hot water tank. Maybe a few degrees higher from the pump friction. I have all my hot water lines (copper) insulated, including return lines, so I am loosing very little heat in the entire cycle. My pump is always hot to the touch, (2 or 3 second contact) guessing about 140 deg. I really don't know what max temp the pump will handle. Hope this helps. Richard.
These pumps can be used in the hot water side such as an instant hot water loop. 140 degrees is no problem
The temp of the pump should the same as the water temp in your system. I assume you are circulating water from a boiler or hot water heater. If so, check to see what temp the heater is set to.
I have 3 taco pumps in operation - they've always run HOT, hotter than I would onto. - I've never attempted to measure the temp. Two have been in operation for 10 years. If you have temperature readings from prior units to compare and you've made no changes to your system I would suspect the replacement cartridge. TACO is an excellent brand, but problems can always occur.
Yes the impeller should turn.
A similar situation happened to me about 2 years ago - motor housing extremely hot to the touch, hot water not circulating, pump motor was humming or otherwise making sounds indicating that it was not running properly. If the impeller isn't turning during normal operation or is physically frozen in place, in conjunction with the very hot motor housing and general lack of water circulation, the cartridge is almost certainly bad. FYI, based on the setup of the recirculation system in my house + the age of the house, it looks like the original cartridge lasted about 9-10 years before it broke down. Installation of a new cartridge is fairly straightforward if you are comfortable with basic household tools (crescent and/or socket wrench, maybe a screwdriver), just make sure you lay down towels (or a large vessel to hold water) and close the water valves on both sides of the pump so that you don't inadvertently drain the line (or the hot water heater) and create a huge mess.
You are correct in your assumption. You need a new cartridge. Remember the order you took it apart so you can put the new o-rings in the proper position to prevent a leak. Jim Bellamy
It was with mine. I put in a replacement cartridge and all is well now.
Yes, the impeller should be freewheeling when out of the housing. JKR
Yes, the impeller should turn freely and it would be a safe assumption the unit needs to be replaced.
My experience is that the cartridge fails resulting in the impeller not turning and a significant heat rise on the case of the motor. Solution is to replace the cartridge. My experience and the advice of my plumber also indicates that this pump should never be turned off or unplugged, as this contributes to premature failure. Power outages seem not to affect it but long-term shutdown seems to have an adverse effect. Two years in a row, when on an extended vacation I unplugged my pump and when I returned, it would not restart. Now I leave it on all the time and have not had a problem since. Hope this helps. Rod
Yes, the impeller should turn freely. Over time some mineral deposits get into the bearings and stop it from turning. Because the cartridge is sealed, there is no good way to open it to clean it out. Replace the cartridge. I am on my third cartridge since 2005.
The impeller is black on this part, but it will work.