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INSTALLATION AND OPERATION MANUAL AND PARTS LIST,
MODELS: STHE-7-TGG, STHE-12-TGG, STHE-16-TGG
INSTALLATION (Continued)
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 prevents 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 condensate 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 softener. The use of a water meter will determine the water
consumption and when the water softener needs regeneration 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 minerals 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 extension which senses the water level in the steam generator 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.
PART NUMBER 10225R0
11
2010-09-07
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