Application Data - Carrier 50TFQ008-012 Product Data

Application data

Outdoor installation — Units approved for outdoor
installation only.
Ductwork — Secure vertical discharge ductwork to roof
curb. For horizontal discharge applications, either attach
ductwork to unit, or use field-supplied flanges attached to
the horizontal discharge openings and attach all ductwork
to flanges.
Horizontal discharge — To convert from vertical dis-
charge to horizontal discharge:
1. Remove economizer or two-position damper to gain
access to return duct opening.
2. Move the horizontal-discharge duct opening covers to
the vertical discharge openings.
3. Rotate economizer
90 degrees.
4. Rotate the barometric relief damper 90 degrees.
5. Install block-off plate over the opening on the access
panel.
Thru-the-bottom power connections — For applica-
tions requiring thru-the-bottom connections, Carrier acces-
sory thru-the-bottom package must be purchased to ensure
proper connections.
Thermostat — Use of 2-stage heating and cooling ther-
mostat is recommended for all units. A 2-stage cooling
thermostat is required on units with accessory economizer
to provide integrated cooling.
Heating-to-cooling changeover — All units are auto-
matic changeover from heating to cooling when automatic
changeover thermostat and subbase are used.
Airflow — Units are draw-thru on cooling and blow-thru
on heating.
or two-position damper
Maximum airflow — To minimize the possibility of con-
densate blow-off from evaporator, airflow through units
should not exceed 236 L/s per kW (500 cfm/ton).
Minimum airflow — For cooling, minimum airflow is
142 L/s per kW (300 cfm/ton). For 50TFQ units with
electric heating, required minimum L/s is 1062 (cfm is
2250) for 50TFQ008; 1203 (2500) for 50TFQ009;
and 1416 (3000) for 50TFQ012, with the following
exceptions:
UNIT UNIT HEATER
50TFQ VOLTAGE kW
012 400 37.7
Minimum ambient cooling operating temperature
— The minimum temperature for standard units is –4 C
(25 F). With accessory Motormaster® control, units can
operate at outdoor temperatures down to –17 C (0° F).
Internal unit design — Due to Carrier's internal unit
design (draw-thru over the motor), air path, and specially
designed motors, the full horsepower (maximum contin-
uous bhp) listed in the Physical Data table and the notes
following each Fan Performance table can be utilized with
confidence.
Using Carrier motors with the values listed in the Physi-
cal and Fan Performance Data tables will not result in nui-
sance tripping or premature motor failure. The unit
warranty will not be affected.
Apollo direct digital controls — The Apollo direct digi-
tal controls must be used with either a Carrier master or
monitor thermostat.
REQUIRED
UNIT
MINIMUM
CONFIGURATION
L/s (Cfm)
Horizontal
1510
or
(3200)
Vertical
35