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*Factory installed.
†Field installed.
**Electric heat for 575-v units is only offered on 50TFQ008-012 units.
Accessory single-point kit is required for size 004-012 units using electric heat.
ITEM
OPTION* ACCESSORY†
Apollo Communicating Controls
X
PremierLink™ Controls
X
X
High-Static Motor and Drive
X
Non-Fused Disconnect Switch
X
Electrical Convenience Outlet
X
Durablade Integrated Economizer
X
X
EconoMi$er (Vertical)
X
EconoMi$er with Power Exhaust
X
EconoMi$er (Horizontal)
X
Electric Heat**
X
Manual Outdoor-Air Damper (25%)
X
Manual Outdoor-Air Damper (50%)
X
Outdoor Coil Grille
X
Alternate Drive (008)
X
Alternate Motor and Drive (004-006, 012)
X
25% Open Two-Position Damper
X
100% Open Two-Position Damper
X
Roof Curbs (Vertical and Horizontal Discharge)
X
Remote Control Panel
X
Thermostats and Subbases
X
Emergency Heat Package
X
Motormaster® I Head Pressure Control
(Speed Control)
X
Motormaster II Head Pressure Control
X
Logo Kit
X
Time Guard® II Control Circuit
X
Thru-the-Bottom Utility Connections
X
Electronic Programmable Thermostat
X
Accusensor™ II Enthaply Control
X
Accusensor III Enthalpy Sensor
X
Outdoor Coil Hail Guard Assembly
X
Fan/Filter Status
X
Salt Spray Protection Grille
X
Options and accessories
ELECTRONIC PROGRAMMABLE THERMOSTAT
Carrier’s electronic programmable thermostat provides efficient tem-
perature control by allowing you to program heating and cooling set-
backs and set ups with provisions for weekends and holidays.
Accessory remote sensing package is also available to provide
tamperproof control in high traffic spaces. Used in conjunction with
factory-installed Apollo control, this thermostat provides a 5-minute
recycle timer between modes of operation for short-cycle protection.
TIME GUARD II CONTROL
Time Guard II Control automatically prevents compressor from
restarting for at least 5 minutes after a shutdown. Accessory pre-
vents short cycling of compressor if thermostat is rapidly changed.
Time Guard II device mounts in the control compartment of unit.
EMERGENCY HEAT CONTROL PACKAGE
Emergency heat control package allows emergency operation
of electric heat and fans by bypassing compressor circuits and
outdoor thermostats.
HEAD PRESSURE CONTROL
The 50TFQ standard units are designed to operate in cooling at
outdoor temperatures down to 25 F. With accessory Motormaster
control (outdoor-fan speed modulation), units can operate at out-
door temperatures down to –20 F. The head pressure controls,
which mount in the outdoor section, modulate the outdoor-fan
motor to maintain correct condensing temperature. Refer to price
pages or contact your local Carrier representative for appropriate
accessory combinations necessary for desired outdoor ambient
temperature operation.
MOTORMASTER
MOTORMASTER II