Regency Sunrise U32S-NG5 - Manual (Page 29)

29 U32S-5 FPI Direct Vent Gas Insert
MAINTENANCE
10) Remove the valve tray by undoing the 12 screws as shown below.
11) Slightly lift out valve tray.
12) Disconnect the inlet gas line.
13) Replace valve assembly and gasket, then reverse steps to reinstall new valve assembly.