Mammoth 7 to 24 Tons: High Efficiency, Superior IAQ Twin and Quad Circuit Horizontal and Vertical (M-Vintage) - Manual (Page 15)

15
MAMM-WSHP-IOM-1MA (November 2011)
Normal maintenance on M-Vintage horizontal and verti-
cal units is generally limited to filter changes.
Air filter changes are required at regular intervals. The
time period between changes will depend upon the pro-
ject requirements. Some applications such as motels
produce a lot of lint from carpeting and linen changes,
and will require more frequent filter changes. It is sug-
gested that the filter be checked at 60-day intervals for
the first year until experience is acquired. If light cannot
be seen through the filter when held up to sunlight or a
bright light, it should be changed. A more critical stan-
dard may be desirable.
The condensate drain pan should be checked annually
and cleaned and flushed as required.
General Maintenance
Recording of performance measurements of volts,
amps, and water temperature differences (both heating
and cooling) is recommended. A comparison of logged
data with start-up and other annual data is useful as an
indicator of general equipment condition.
Periodic lockouts almost always are caused by air or
water problems. The lockout (shutdown) of the heat
pump is a normal protective result. Check for dirt in the
water system, water flow rates, water temperatures,
airflow rates (may be dirty filter), and air temperatures.
If the lockout occurs in the morning following a return
from night setback, entering air below machine limits
may be the cause.