Riello 40 F5 Installation & Operating Manual page 16

AMULET INSTALLATION INSTRUCTIONS
(Required
on some
models)
The amulets provided have been selected by Riello to protect the combustion tube from bt 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 dimneter.
The mnulet 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 mnulet over the
combustion tube. Excessive force can result in a broken amulet!
If the mnulet 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 diagrmn below shows the proper position of the mnulet after installation.
Amulet shown in
the flush --_
mounted position _
Head Receeded "If-t
1/4 inch max. *"-_
4__
NO AMULET
AMULET
LOW PRESSURE
]
air tube
increase in
pressure down air
tube due to
increase in
combustion
chamber pressure
flue
gases
tapered combustion
chamber causes
increase in pressure
inside
increase in pressure down air
tube due to increase in
combustion chamber
pressure
LOW PRESSURE I
air tube
AMULET HELPS
PREVENT HOT
GASES FROM
TRAVELLING
DOWN AIR
TUBE
gases
tapered combustion
chamber causes
increase }n pressure
inside
heat
i H'GHPRESSU E I
heat
ncrease in pressure down air
tube due to increase in
combustion chamber
pressure
Standard 40 F3-F5 I-O manual Rev4 l.doc Page 16 of 16