Bradley EFX 20/S19-2150 Manuel D'installation page 6

EFX 20/S19-2150
5
Optional Water Recirculation Setup
Recirculating the water in the system provides constant regulation of the water temperature. Flush the supply
lines thoroughly after completing installation. Close off all fixtures and label them as not available for use
durin g the recirculating process.
Check Valve
(Typ)
Cold
Water
Water
Heater
1. Turn off the recirculating pump and turn on the water supply at emergency fixture (a water flow rate of 10-15 GPM is
required).
2. Let the water run through the system until a consistent temperature is obtained. If you do not obtain the required
temperature, refer to step #3 on previous page for temperature readjustment.
3. As soon as the water reaches the proper temperature, turn on the recirculating pump (make certain the proper system
temperature has been achieved before proceeding).
4. Check the water temperature at the return pump. If the temperature exceeds the appropriate level by 2°F, adjust the
temperature high-limit switch (this will turn off the pump). Wait until the return water temperature is 5°F below the
appropriate level and adjust the low-limit switch (this will turn the pump back on).
5. Open the balancing valve completely.
6. Turn off all fixtures and make sure there is no water running through the system (the cold inlet pipe should feel warm to the
touch).
7. Let the system run for 30 minutes or longer without water. If, after thirty minutes, the water temperature increases, you may
readjust the temperature by slowly closing the balancing valve until the appropriate temperature is reached.
6
COLD
Heat Trap
28" Drop
HOT
Balancing Valve (Typ)
Storage
Tank
12/7/2017
Tempered Water Flow
Alternate
Recirculation
(less than 5 GPM)
Return Flow
Recirculating Pump
Bradley • 215-1809 Rev. B; ECN 17-09-009
Installation
Temperature Switch
Recirculated
Tempered
Water