LP-447 Rev. 7.7.17
7
• Read the temperature and pressure gauge to ensure the
system is pressurized. Minimum is 10 psi. Maximum is 25
psig on the central heating loop of heating and combination
appliance models; 145 psig on VWH models. Lift the relief
valve top lever slightly, allowing water to relieve through
the valve and discharge piping.
• If water flows freely, release the lever and allow the valve
to seat. Watch the end of the relief valve discharge pipe to
ensure that the valve does not weep after the line has had
hard time to drain. If the valve weeps, lift the lever again
to attempt to clean the valve seat. If the valve does not
properly seat and continues to weep, contact a qualified
service technician to inspect the valve and system.
• If water does not flow from the valve when you completely
lift the lever, the valve or discharge line may be blocked.
Immediately shut the appliance down per instructions on
page 2 and call a qualified service technician to inspect the
valve and system.
D. Annual Maintenance - To be performed by a Qualified
Service Technician
Check the Burner
The burner should be checked and cleaned only by a qualified
service technician.
Cleaning the Cold Water Inlet Filter (Draining the Appliance) (If
Applicable)
The Cold Water Inlet Filter should only be cleaned by a qualified
service technician.
Flushing the Appliance
Flushing the Appliance heat exchanger is a complicated procedure
that should only be performed by a qualified service technician.
NOTE:
Improper maintenance WILL VOID appliance warranty.
