Carrier 50TFQ004 Product Data page 8

Options and accessories (cont)
ELECTRIC HEATER
Electric heaters are available in a wide range
of capacities for field installation.
THERMOSTAT
Zone thermostat (24 v) provides one- or 2-stage
cooling for control of unit. Matching subbases are
available with or without tamperproof switches and
automatic changeover.
THERMIDISTAT™ CONTROL
The Light Commercial Thermidistat Control combines
temperature and humidity control in one device.
DURABLADE ECONOMIZER
8
H
ACCUSENSOR™ II
Accusensor economizer controls help provide efficient, economical
economizer operation. Accusensor II solid-state enthalpy control
includes the logic and one sensor to calculate both dry- and wet-bulb
of the outdoor air to provide an accurate enthalpy reading. It then
decides when to energize the economizer based on this reading.
Accusensor III sensor (required for all units for differential enthalpy
sensing) compares outdoor temperature and humidity to return-air
temperature and humidity and determines the most economical mix-
ture of air (purchased in addition to enthalpy control for differential
enthalpy sensing).
Exclusive Durablade economizer damper design saves energy while
providing economical and reliable cooling. A sliding plate on the face
of the economizer controls the amount of outdoor air entering the sys-
tem. Closed, it provides a leakproof seal which prevents ambient air
from seeping in or conditioned air from seeping out. It can be easily
adjusted for 100% outdoor air or any proportions of mixed air. Like the
base unit, the economizer is easily converted for horizontal discharge
applications.
ACCUSENSOR III