Mammoth V-Cube Slim E-Series (Standard Versions) - Manual (Page 15)

15
MAMM-VCS-IOM-1EB (October 2011)
Normal maintenance on any V-Cube Slim™ unit in-
cludes buy may not be limited to:
 Air filter changes. Air filters must be replaced a
minimum of two times per year. A good standard
to follow is at the beginning of the heating season
and the beginning of the heating season. In certain
environments, more frequent filter changes may be
required. For new installations, it is recommended
that the air filters be checked every 60 days and
changed as required until a regular interval can be
established. An air filter needs to be replaced if no
light can be seen through it when it is held up to a
light.
 Condensate drain. The condensate drain and
drain pan should be checked on an annual basis to
verify positive drainage and cleaned or flushed as
necessary.
 Data recording. Recording current draw of com-
pressors and blower motors at regular intervals is
recommended to verify their condition. Recording
differences in water temperature and air tempera-
ture at regular intervals can help identify any per-
formance degradation. Annual comparison of the
data will aid in determining the overall condition
and operation of the unit.
General Maintenance
 Nuisance trips and/or lockouts. Occasional trips
and/or lockouts are generally caused by water or
airflow restrictions. When a trip or lockout occurs,
check the water flow rate, incoming water tempera-
ture, airflow rates and incoming air temperature.
Take corrective action necessary to enable unit
operation.
Brazed plate heat exchanger cleaning
When it is necessary to flush and clean a brazed plate
heat exchanger, circulate a diluted mixture of cleaning
acid for a Clean-in-Place (CIP) process. A five percent
solution of phosphoric acid is an effective choice for
most units. If frequent cleaning is required, use a five-
percent solution of oxalic acid.
For best results, the cleaning solution flow rate should
be at least 1.5 times the normal flow rate, preferably in
backflush mode. Before restarting, flush the unit with
fresh water to purge any remaining acid.