Filling Water Jacket - Thermo Scientific 3110 Operating And Maintenance Manual

Section 1
Installation and Start-Up

Filling Water Jacket

1-10 Water Jacketed CO Incubator
2
Caution For stacked incubators, completely fill the bottom unit before
filling the top unit in order to maintain the lowest possible center of
gravity.
Turn the power switch On. ADD WATER will appear in the message
center. Press the Silence key to silence the alarm for 15 minutes. If the
water jacket is empty, yet the message center does not display ADD
WATER, then the liquid level switch could be faulty. Call Technical
Services.
Remove the fill port plug and set aside.
For ease of connecting/disconnecting, use the silicone tubing provided to
connect directly to the fill port. See Figure 1-1 and this detail. Do not
install vinyl tubing directly onto the fill port as it may be difficult to
remove. A 3/8" to 3/8" hose connector has been provided to attach lengths
of vinyl tubing to the silicone fill port tubing to reach the water source, or
simply attach the included funnel to manually fill using small containers.
Caution Chlorine is detrimental to stainless steel. Using chlorinated tap
water or additives that contain chlorine will void water jacket warranty!
For optimum incubator operation, the recommended water type is sterile
distilled Type 2 water with a pH between 7 and 9, and a resistivity
between 50kΩ - 1MΩ-cm (conductivity of 1-20μS/cm). Reverse osmosis
(RO), deionized (DI), and ultrapure Type 1 water
can corrode stainless steel, copper, glass, and other
incubator components over time because high purity
water with low ionic content and high resistivity will
actively pull ions from these materials. If sterile
distilled Type 2 water is not readily available, then
these other water types could be used by adding the
necessary amount of a sterile solution of weak sodium
bicarbonate to raise the pH between 7 and 9 and lower the resistivity
between 50kΩ - 1MΩ-cm (conductivity of 1-20μS/cm).
Caution Do not block the water jacket vent!
Carefully fill the jacket with water. Do not overfill the jacket as the excess
water will pour out through the water jacket vent (see Figure 1-1).
When the jacket is full, the audible alarm will sound a continuous tone for
10 seconds and the alarm condition will be cleared. Refer to Section 4,
Table of Alarms.
Note Model 3100 Series incubators are shipped from the factory with a
rust inhibitor added to 0.2 gallons (0.8 liters) of water in the jacket. The
rust inhibitor must be replenished every 2 years. See Section 5 to drain
water from the jacket and add the correct proportion of rust inhibitor
mixture back into the jacket.
Detail 1
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