Dean D50 Installation, Operation & Maintenance Manual page 9

Number
of Fryers 1
19mm
Natural Gas
(3/4")
13mm
Propane Gas
(1/2")
(*) When exceeding 6 meters for a
configuration of more than 4 fryers, it
is necessary to provide a 33mm (1 ¼")
rigid gas connection.
CAUTION
The fryer must be isolated from the gas supply
piping system by closing its individual, manual
shut-off valve during any pressure testing of the
gas supply piping system at pressures equal to
or less than 35 mbar (½ psig).
b. Rigid Connections: The fryer can be
connected singularly or as part of a
cooking line.
supplied intake pipe(s) visually and
clean threading chips, or any other
foreign matter before installing into a
service line. If the intake pipes are not
clear of all foreign matter, the orifices
will clog when gas pressure is
applied.
CAUTION
All connections must be sealed with a
joint compound suitable for the gas being
used, and all connections must be tested
with a soapy solution before lighting any
c. Flexible Couplings & Connectors:
1. A restraining bracket is provided
on the structural back of the fryer
to prevent the unit from moving
from its installed position.
The fryer must be restrained by
means
flexible coupling or connector in
order to limit the movement of
the fryer.
4 and
2 to 3 more
(*)
25mm 33mm
(1") (1 ¼")
19mm 25mm
(3/4") (1")
Check any installer-
pilots.
independent of
2. CE Standards: If the unit is to be
The fryer and its individual shut-off valve must
be disconnected from the gas supply piping
system during any pressure testing of the gas
supply system at test pressures in excess of 35
mbar (½ psig).
d. Manual shut-off valve: This gas
service supplier-installed valve must
be installed in the gas service line
ahead of the fryer in the gas stream
and in a position where it can be
reached quickly in the event of an
emergency.
e. Orifices: The fryer can be ordered to
operate on any available gas. The
correct
appropriate gas orifices, and pilot
burner are installed at the factory.
While the valve can be adjusted in the
field, only qualified service personnel
should make any adjustments with the
proper test equipment.
f. Pressure regulating:
1. External gas regulators are not
2. If the incoming pressure is in
Any adaptation, modification, or gas conversion
the
must be performed by qualified personnel only.
Failure to use qualified personnel will void the
Dean warranty.
8
installed with flexible coupling,
use a commercial flexible coupling
certified as NF D 36123 (or other
national standard) or a quick
disconnect device certified NF D
36124 (or other national standard).
CAUTION
safety control
normally required on this fryer, as
that function is performed by a
safety control valve.
excess of 3.45 kPa (½" PSIG), a
step-down regulator will be
required. Your local servicer
should check the manifold pressure
with a manometer.
CAUTION
valve,