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KAH Operation & Maintenance Guide
Page: 36 of 88
SECTION 3 - MAINTENANCE
GENERAL REQUIREMENTS
The maintenance requirements for AHUs are shown below. The procedure is in the left-hand column, and the minimum
required frequency is marked is described in the right-hand column.
Refer to ANSI/ASHRAE Standard 62.1-2010 for start-up and maintenance practices related to achieving acceptable
indoor air quality. ANSI/ASHRAE Standard 62.1-2010 is under continuous maintenance by a Standing Standard Project
Committee (SSPC), for which the Standards Committee has established a documented program for regular publication
of addenda or revisions, including procedures for timely, documented, consensus action on requests for change to any
part of the standard as shown in Table 10 on page 51.
PROCEDURE
EVERY 3
MONTHS
EVERY 6
MONTHS
ANNUALLY
EVERY
5 YEARS
Maintain filters and air cleaning devices.*
X
Visually inspect or remotely monitor the outdoor air dampers and actuators for
proper function.
X
Clean and maintain humidifiers to limit fouling and microbial growth.
X
Visually inspect the dehumidification coils for cleanliness and microbial growth.
Clean when fouling is observed.
X
Visually inspect drain pans and other adjacent surfaces subject to wetting for
cleanliness and microbial growth and clean when fouling is observed.
X
Verify sensors used for dynamic minimum outdoor air control accuracy and
recalibrate or replace as necessary.
X
Measure the minimum quantity of outdoor air in the AHUs except for AHUs under
1000 L/s (2000 CFM. If measured minimum airflow rates are less than 90% of
the minimum outdoor rate in this manual. They shall be adjusted or modified to
bring them above 90% or shall be evaluated to determine if the measured rates
are in conformance with this ASHRAE standard.
X
Maintain the floor drains located in plenums or rooms that serve as air plenums
to prevent transport of contaminants from the floor drain to the plenum.*
X
Keep clear the space provided for routine maintenance and inspection around
ventilation equipment for equipment component accessibility.*
X
Investigate and rectify the visible microbial contamination.*
X
Investigate and rectify the water intrusion or accumulation.*
X
TABLE 8 - MINIMUM / MAINTENANCE REQUIREMENTS ACCORDING TO ASHRAE
*Minimum frequencies may be increased or decreased from what is indicated in this table.
