Overview of Primary Product

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26
Issue Cause Solution
No or low
pressure
1. Not enough pressure at startup
2. Insufficient fill and purge
procedure
3. Leak in the system (at the unit)
4. Leak in the system (tubing)
5. Temperature and pressure (T&P)
relief valve released
1. After filling and purging, the pressure was not set at designed pressure
level. Add fluid to the system to raise the pressure level. Be aware,
this may require a complete fill and purge procedure since air might
enter the system during the filling process. Note: Close all loops before
starting the fill (this will prevent air from entering the loops, requiring
only the unit to be purged).
2. If the system pressure was set at the desired level at startup and now
has dropped and maintained at a lower level, this indicates all air was
not purged from the system (air was vented out during operation).
Perform another fill and purge. See Section 6: Filling and Purging.
3. Leaks in the system at the Radiant Ready 30E unit are visible
(such as stains, mineral buildup at wet spots, etc.).
If the leak is at a fitting or the flange, try tightening the fitting/bolts.
These types of leaks can occur due to vibration during shipping.
If the leak is at a fitting that cannot be tightened, contact Uponor
Technical Services.
[e-mail]
888.594.7726 (U.S.)
888.994.7726 (Canada)
4. If a leak can’t be detected in the unit, the leak might be in the tubing.
a. Look for wet spots or staining where possible.
b. If a leak cannot be detected visually, pressure test the system
loop by loop.
5. If the T&P relief valve has opened or is leaking, the pressure
might be low or zero.
a. If the T&P relief valve is leaking, check for water in the drain
line (place the drain line in a bucket for a period of time and
see if water accumulates).
b. If the T&P relief valve has opened due to high pressure
(above 30 psi), refer to the high pressure issue below.
c. If the T&P relief valve releases at a lower pressure than specified
(30 psi), the valve is faulty and needs to be replaced.
Troubleshooting (continued)