TM 9-4110-255-14
NOTE
he repeat cycle timer controls are marked T1 and T2. Control T1 adjusts the length of time the
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refrigeration unit will operate continuously before initiating a defrost cycle. Control T2 adjusts
the maximum length of time the refrigeration unit will remain in the defrost cycle.
he timer scales indicate an approximate percentage of time based upon a 24 hour cycle. For
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example, to set the timer for 6 hours, adjust the control to 25% (6 hours is 25% of 24 hours).
he timer controls have a minimum setting of 14 minutes when set at 0%.
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c. Adjust the repeat cycle timer (4) control T1 to approximately 25% (6 hours) and control T2to approximately 2%
(30 minutes). This is the recommended factory setting, however, the controls can be set as desired to best suit
the operating conditions.
d. Close the control box cover (3). Install two new lock washers (2) (1, appendix G) and bolts (1).
e. Unlatch and close the control panel cover. Secure closed with barrel bolts.
Figure 4-5. Defrost Timer Adjustment
4-7
