KEEPING YOUR SYSTEM IN TOP
HM30 Temperature / Pressure Relief Valve Testing
TEMPERATURE / PRESSURE (T&P) RELIEF VALVE
TESTING PROCEDURE
This valve is a safety device to protect against abnormally high temperature and pressures. Periodic discharge of the relief valve may indicate thermal expansion within a closed system.
A thermal expansion tank will be needed to allow water to expand.
If the valve discharges, it is doing so because there is a problem. Call your Lennox dealer or qualified technician to inspect the unit for proper operation. Do not ignore the water dis
charge. Never plug the T&P relief valve.
Test Lever
(Lift up to discharge water)
Drain Line
WARNING
Danger of Personal Injury from Scalding. Water from T&P relief valve may be ex& tremely hot and is not tempered. Use ex& treme caution when discharging valve. Re& placement of T&P valve should be done by a trained professional or a licensed plumb& ing contractor.
HM30
Unit
T&P valve testing should be done annual ly. Remove HM30 top access panel. Lo cate the temperature and pressure relief valve.
Test the T&P valve by lifting the lever up until the valve unseats. This allows
the water to discharge. Never open the T&P valve unless it is connected to a discharge line.
If water does not flow, valve may be obstructed or corroded. Call your Lennox dealer or qualified techni cian to inspect the valve.
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