Amulet Installation Instructions - Riello F3 Installation Manual

The amulets provided have been selected by Riello to protect the combustion tube from hot exhaust gases and
flame. This protection may be needed in applications where the combustion tube opening in the combustion
chamber refractory is larger than the tube outside diameter.
The amulet has been sized to fit Riello Model 40 sizes F3 and F5 plus the Riello Model R35.
When installing this amulet, handle it carefully. Do not exert undue pressure when pushing the amulet over the
combustion tube. Excessive force can result in a broken amulet!
If the amulet will not fit easily onto the tube, remove a small amount of the inner diameter with a sharp knife to
provide the necessary clearance.
The diagram below shows the proper position of the amulet after installation.
LOW PRESSURE
air tube
increase in
pressure down air
tube due to
increase in
combustion
chamber pressure
C6501010 STANDARD F3-5 MANUAL Rev. 3-2 10/12/2006

AMULET INSTALLATION INSTRUCTIONS

(Required on some models)
Amulet shown in
the flush
mounted position
Head Receeded
1/4 inch max.
NO AMULET
flue
gases
tapered combustion
chamber causes
increase in pressure
inside
heat
HIGH PRESSURE
heat
increase in pressure down air
tube due to increase in
combustion chamber
pressure
tapered combustion
chamber causes
increase in pressure
LOW PRESSURE
heat
air tube
heat
AMULET HELPS
increase in pressure down air
PREVENT HOT
tube due to increase in
GASES FROM
combustion chamber
TRAVELLING
DOWN AIR
TUBE
AMULET
flue
gases
inside
HIGH PRESSURE
pressure
16