Rheem STELLAR 4A Series Owner's Manual And Installation Instructions page 18

MAINTENANCE REQUIREMENTS
MINOR MAINTENANCE EVERY SIX MONTHS
It is recommended minor maintenance be performed every six (6) months. Minor
maintenance can be performed by the dwelling occupant.
The minor maintenance includes:
•
Operate the easing lever on the temperature pressure relief valve. It is very
important the lever is raised and lowered gently. Refer to
on page 9.
Warning: Water discharged from the temperature pressure relief valve
drain line will be hot. Exercise care to avoid any splashing of water by
standing clear of the drain line's point of discharge when operating the valve's
easing lever.
•
Operate the easing lever on the expansion control valve (if fitted). It is very
important the lever is raised and lowered gently. Refer to
on page 9.
•
Check the drain line from the safe tray (if one is installed) is not blocked.
18
"Relief Valves"
"Relief Valves"