FMcCracken
New Member
I manage 4 townhouses which have identical plumbing systems/ layouts. So, if a problem comes up in one unit, there's a good chance that it's bound to come up in the others. This solution can potentially be applied to each of the 4 townhouses, which are only 5 years old.
One client is telling me that the Master shower works great, regardless of how long they shower. They have never run out of hot water when showering. However, the Master tub - notsomuch. The hot water comes out of the tub faucet at 120* for the first 1/2 minute. Then gradually lowers to 110* during the second minute and then before the second minute is over, the temperature reduces further to 100*. If the tub hot water is turned off for a minute, the water comes out at 120* (after a few seconds) when turned back on.
The hot water tank is set to just south of Scald and a mixing valve (Taco 5000Series) tempers the hot water to 130*, shown on the in-line temperature gauge.
When the tub begins filling (3rd Flr, hence the initial temperature drop), the water temperature at the Taco mixer, reduces to the same temperature as tub spout - 120*. After 5 minutes of running, the water temperature maintains at 95*-100* - at the mixing valve and tub.
There is a Honeywell Aquastat L4006A unit which regulates a hot water circulation pump, installed on the return side. The hot water return mixes with the cold water supply that feeds the Taco mixing valve to further extend the hot water capacity. Currently, the aquastat is broken, so the pump runs 24/7. We are going to replace the aquastat and the mixing valve and install temperature gauges on each the hot and cold water supplies to compliment the existing tempered feed.
A. Should we add/ install a mixing valve where the hot water return meets the cold water supply feeding the primary/ existing mixing valve to better control the water temperature/ differential at the valve?
B. Which model Honeywell/ Resideo aquastat is best for this type of installation? There are High Limit, Low Limit, High and Low Limit units. What should the differential be?
C. The current mixing valve temperature was set when water was not being used. If it is set while water is being used, the initial hot water coming out of all taps is way too hot.
D. Any ideas on how to better regulate the hot water temperature coming out of the tub faucet and sink faucets? The shower has a thermostatic showerbody so that "should" be a no brainer.
How water tank and boiler (Ultra 3) are Weil-McLain
Frankie
One client is telling me that the Master shower works great, regardless of how long they shower. They have never run out of hot water when showering. However, the Master tub - notsomuch. The hot water comes out of the tub faucet at 120* for the first 1/2 minute. Then gradually lowers to 110* during the second minute and then before the second minute is over, the temperature reduces further to 100*. If the tub hot water is turned off for a minute, the water comes out at 120* (after a few seconds) when turned back on.
The hot water tank is set to just south of Scald and a mixing valve (Taco 5000Series) tempers the hot water to 130*, shown on the in-line temperature gauge.
When the tub begins filling (3rd Flr, hence the initial temperature drop), the water temperature at the Taco mixer, reduces to the same temperature as tub spout - 120*. After 5 minutes of running, the water temperature maintains at 95*-100* - at the mixing valve and tub.
There is a Honeywell Aquastat L4006A unit which regulates a hot water circulation pump, installed on the return side. The hot water return mixes with the cold water supply that feeds the Taco mixing valve to further extend the hot water capacity. Currently, the aquastat is broken, so the pump runs 24/7. We are going to replace the aquastat and the mixing valve and install temperature gauges on each the hot and cold water supplies to compliment the existing tempered feed.
A. Should we add/ install a mixing valve where the hot water return meets the cold water supply feeding the primary/ existing mixing valve to better control the water temperature/ differential at the valve?
B. Which model Honeywell/ Resideo aquastat is best for this type of installation? There are High Limit, Low Limit, High and Low Limit units. What should the differential be?
C. The current mixing valve temperature was set when water was not being used. If it is set while water is being used, the initial hot water coming out of all taps is way too hot.
D. Any ideas on how to better regulate the hot water temperature coming out of the tub faucet and sink faucets? The shower has a thermostatic showerbody so that "should" be a no brainer.
How water tank and boiler (Ultra 3) are Weil-McLain
Frankie
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