SERVICE POLICY & PROCEDURES
LONG-TERM STORAGE
PERIODIC CHECKLIST AND LOGS
AIR HANDLING UNITS
Supersedes: 50.20-CL3 (507)
Form 50.20-CL3 (909)
Failure to comply with these requirements will render
any written or implied Johnson Controls warranty null and void.
I. Supplementary Documentation
The following documentation is required to FULLY COMPLY with the long term storage requirements.
A. Long-Term Storage Requirements - GENERAL (refer to Form 50.20-NM1).
B. Long-Term Storage Requirement - LONG -TERM STORAGE REQUIREMENT FIELD
PREPARATION, AIR HANDLING UNITS (refer to Form 50.20-NM3).
II. Checks
1.0 Monthly Checks
1.1 Visually inspect Air Handler for damage.
1.1.1 Motors/Drives - The motors and sheaves should be inspected externally for evidence of
damage to the protective covering. An inspection is necessary only if it is apparent that the
control protection has been disturbed. If this is found, the motor should be re-protected by
wrapping and tightly sealing the control with plastic and inserting a desiccant to absorb
moisture.
1.2 Refrigerant Coils - Check holding charge pressure monthly to be sure that the pressure has not
dropped. If pressure has dropped, the unit should be inspected for signs of visible damage which
may have caused the loss of pressure. If pressure drops more than 2 psi, the unit should be pressure
tested to locate the leak, the leak repaired, and the unit recharged with nitrogen to 5 psig pressure.
Note this in the comments section of the monthly log sheet (see page 2 of this document).
1.3 Rotate fan shaft several revolutions by hand every month.
Contract No. _______________________ Date Delivered _____________________
Job Name _______________________ Date of Storage Prep. _____________________
Serial No _______________________ Condition of Unit Delivered _________________
Unit Model No _______________________ Explain: _________________________________
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