5
INSTALLATION
An adequate gas supply is imperative. Undersized or low
pressure lines will restrict the volume of gas required for
satisfactory performance. A steady supply pressure, be-
tween 6” W.C. and 14” W.C. for natural gas and 11” W.C.
and 14” W.C. for propane gas is recommended. With all
units operating simultaneously, the manifold pressure on
all units should not show any appreciable drop. Fluctua-
tions of more that 25% on natural gas and 10% on pro-
pane gas will create problems, affecting burner operation.
Contact your gas company for correct supply line sizes.
Purge the supply line to clean out any dust, dirt or other
foreign matter before connecting the line to the unit. Use
pipe joint compound which is suitable for use with Liquid
Propane on all threaded connections.
Test pipe connections thoroughly for gas leaks.
• Use soapy water only for testing on all gases.
•
Never use an open flame to check for gas leaks.
• All the connections must be checked for leaks after
the unit has been put in operation.
ELECTRICAL CONNECTION
120 VAC-60 Hz - Single Phase
Units with this electrical rating are factory supplied with a
three-wire cord and three-prong plug which fits any stan
-
dard 120V, three-prong grounded receptacle. A separate
15 amp supply is needed for each unit.
PLUMBING CONNECTION
WARNING
Plumbing connections must comply with ap-
plicable Sanitary, Safety and Plumbing Codes.
Two water lines are provided. Connect water supply lines
to the 3/8” copper tubes at the rear of the steamer.
One line is for supply of water to the generator and one
for cold condensate water to condense live steam enter-
ing the drain line.
DRAIN CONNECTIONS
Appliance drain is 2 inch pipe size. Provide open air gap
type drain.
WARNING
An open gap floor drain is required immedi
-
ately below the appliance drain. PVC OR CPVC
are not acceptable materials for drains.
The drain piping must consist of temperature
resistant material, greater than 160°F, and
be of adequate diameter not to cause flow
restriction. Improper materials may deform
and cause restrictions, thus affecting perfor-
mance.
COLD WATER CONDENSER
The steamer is equipped with a cold water condenser, in
the rear of the cooking chamber, which helps to condense
the steam prior to discharge into the drain. The steamer
freely vents itself by the negative pressure created by the
condensate water drainage. This negative pressure pre-
vents steam leakage around the door gasket and helps
draw the steam through the cooking compartment. Steam
leakage at the door may indicate a plugged or improperly
installed drain.
Temperature of condensate water flowing through the
drain is controlled by the thermostatic cooling valve (TCV)
located inside the controls compartment on the right side
of the unit. The valve has been factory set to keep con-
densate water flowing into the drain at or below 140°F.
Depending on local plumbing code requirements, this
setting may be changed to obtain a different maximum
drainage temperature. Refer to next section Performance
Check for instructions to set the (TCV).
WATER CONDITIONING
It is important that the water supplied to the generator be
softened to no more than 2.0 grains of hardness and have
a pH of 7.0 to 8.5. This degree of hardness can be easily
obtained with the use of a properly maintained water soft-
ener. The use of a water meter will determine the water
consumption and when the water softener needs regen-
eration or recharging. Failure to comply with these water
condition standards may void the warranty.
Untreated water contains scale producing minerals which
can precipitate onto the surfaces in the steam generator.
Due to the temperatures in the steam generator, the min-
erals can bake onto the surfaces and components. This
can result in early component failure and reduced product
life. Water level probes become coated with scale. Scale
may bridge across the probe insulator from the metal ex-
tension which senses the water level in the steam genera-
tor shell.
Once this scale becomes wet, the water level control is
unable to maintain the proper water level in the steam
generator.
STRAINERS and FILTERS will NOT remove minerals
from the water.
Utility Connections
