57
Electric Heating
The unit is designed to heat a given amount
of air while operating. If this amount of air is
greatly reduced, approximately 1/3 during
the heating season, the electric heating coil
may overheat, and may cut the heater off
entirely by action of the safety high
temperature limit devices which are factory
mounted at the heat exchanger and supply fan
areas.
Adjust airflow after installation to obtain an
air temperature rise within the range
specified on the unit rating plate at the
required external static pressure.
The maximum supply air temperature is 60°C
(140°F).
Table 22 - Electric Heating Capacities
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