OPERATION
BLANKETROL II, Model 222S
OPERATION AND TECHNICAL MANUAL
Page 23 of 110
1-5.3. Cooling System
The BLANKETROL II cooling system is composed of a compressor, condenser, condenser
fan, an evaporator coil, water temperature control, solenoid valve, hot gas by-pass valve,
and two low temperature safety devices. Temperature ranges are described in Section (1-
5.5.).
The refrigerant of the cooling system flows through the evaporator coil located in the
circulating reservoir. The water circulating in the reservoir flows over the evaporator coil and
is cooled.
The cooling system is operational whenever the control system calls for a decrease in the
temperature of the water in the BLANKETROL II equipment. It is important to note that the
rate of change in the temperature of the water in the BLANKETROL II equipment is not
directly proportional to the rate of change in the temperature of the patient.
1-5.4. Circulating System
The BLANKETROL II circulating water system is composed of a magnetically driven
circulating pump, a dual compartment reservoir, a water filter, quick-disconnect fittings,
connecting hose, an internal by-pass, a flow switch, a flow indicator, and hyper-hypothermia
blanket(s).
The 2-gallon (7.6 liters) capacity dual compartment reservoir is composed of the circulating
reservoir situated under and connected to the replenishing reservoir. When the operator fills
the reservoir with distilled water, the circulating reservoir fills first and holds approximately ½
gallon (1.9 liters) of water. The remaining 1½ gallons (5.7 liters) are held in the replenishing
reservoir. The water moves from the replenishing reservoir to the circulating reservoir as
needed.
The circulating water flows over and around the heating/cooling element located in the
circulating reservoir. The heated or cooled water then flows out the reservoir to the
circulating pump, through the pump housing, through connecting hoses over a water
temperature sensor to the hyper-hypothermia blanket(s). The water circulates through the
blanket(s) and returns to the unit. The water then passes through the water flow indicator,
through the water filter, through the flow switch and returns to the circulating reservoir to be
reheated or re-cooled and then recycled.
An internal by-pass inside the BLANKETROL II by-passes the quick-disconnect fittings, the
flow indicator, the water filter and the flow switch for water circulation during preconditioning
of the water.
The circulating water system contains a flow switch to alert the operator when an occlusion
prevents water flow through the blanket(s). The flow switch will only activate an alarm when
flow is interrupted after normal flow has been detected. Therefore, the operator should
check the flow indicator for proper flow when operation is first begun or check if the flow
switch is stuck closed upon initial power up.
In addition, the replenishing reservoir contains a low water level sensor which shuts down
the unit and sounds the alarm if the water level drops below a preset amount. The unit
becomes operational only after the water level is restored to normal.
Summary of Contents for CSZ Blanketrol II 222S
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