Sure Heat FM35PHLP Patio Heater - Manual (Page 8)

Assembly Process
8
Step 5 - Place washers onto emitter bolts,
then attach reflector to emitter assembly,
using three cap nuts.
Step 6 - Rotate regulator toward opening in
housing. Line up threads on gas cylinder
with those on the regulator. Insert and
rotate cylinder clockwise until tight.
Step 7- Close access panel.