FIELD REPAIR/SERVICE
BLANKETROL II, Model 222S
OPERATION AND TECHNICAL MANUAL
Page 85 of 110
5-17. LEAKAGE CURRENT
The BLANKETROL II unit should periodically be checked for Leakage Current prior to general
floor use. Using an electrical safety analyzer, measure the electrical Leakage Current under the
following conditions: Power ON & Off, polarity normal and reverse. The Leakage Current
should be less than 300 microamps under all conditions for 115 Volt. The Leakage Current
should be less than 500 microamps under all conditions for 230 volt. If a BLANKETROL II unit
has Leakage Current that exceeds 300 microamps in the 115V unit or has a significant increase
in Leakage Current, the cause should be investigated and individual components of the unit
must be electrically isolated and measured. All readings may be affected by the age of the
components, ambient temperature, and humidity.
5-17.1. Arranging The Equipment
A. Plug the BLANKETROL II power cord into a Leakage Current tester and plug the tester
into a power source.
B. Attach the input lead wire of the tester to a grounding point of the BLANKETROL II unit.
5-17.2. Taking Measurements In Normal Polarity
A. Set the tester to Normal Polarity.
B. Push the power switch of the BLANKETROL II unit to the
“I” position and record the
Leakage Current.
C. Set the BLANKETROL II unit so it is COOLING and record the Leakage Current.
To set the unit in the Cooling Cycle:
1. Press the power switch to the
“I” position.
2. Press the TEMP SET button.
3. Press the Down arrow so the set point is a low number.
4. Press the MANUAL CONTROL button.
The SETPOINT/ STATUS display must show
COOLING
.
D. Set the BLANKETROL II unit so that it is HEATING and record the Leakage Current.
To set the unit in the heating cycle:
1. Press the power switch to the
“I” position.
2. Press the TEMP SET button.
3. Press the Up arrow so the set point is a high number.
4. Press the MANUAL CONTROL button.
The SETPOINT/ STATUS display must show
HEATING.
5-17.3. Taking Measurements In Reverse Polarity
A. Set the tester to Reverse Polarity.
B. Press the power switch of the BLANKETROL II unit to the
“I” position and record the
Leakage Current.
Summary of Contents for CSZ Blanketrol II 222S
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