Application Data; Ductwork; Horizontal Discharge; Minimum Airflow - Carrier 50TFQ004 Product Data

Application data

Outdoor installation — Units approved for outdoor in-
stallation 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 (Durablade economizer
only):
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 or two-position damper 90 degrees.
4. Rotate the barometric relief damper 90 degrees.
5. Install block-off plate over the opening on the access
panel.
Horizontal EconoMi$er — A field-installed accessory
for horizontal discharge applications. Field-installed power
exhaust accessory also available for vertical or horizontal
EconoMi$er applications.
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.
Maximum airflow — To minimize the possibility of con-
densate blow-off from indoor coil, airflow through units
should not exceed 500 cfm/ton on 004-012 units.
72
Minimum airflow — For cooling, minimum airflow is
300 cfm/ton. For 50TFQ units with electric heating,
required minimum cfm is 900 for 50TFQ004; 1200 for
50TFQ005; 1500 for 50TFQ006; 1800 for 50TFQ007;
2250 for 50TFQ008; 2500 for 50TFQ009; and 3000 for
50TFQ012, with the following exceptions:
UNIT UNIT HEATER
50TFQ VOLTAGE kW
208/230 42.4
208/230 50.0
012
460 50.0
17.0
008-012 575
34.0
Minimum ambient cooling operating temperature
— The minimum temperature for standard units is 25 F.
With accessory Motormaster® control, units can operate
at outdoor temperatures down to –20 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.
Carrier PremierLink™
PremierLink controls can be used with any thermostat.
REQUIRED
UNIT
MINIMUM
CONFIGURATION
CFM
Horizontal 3200
Horizontal 3200
Horizontal
or 3200
Vertical
Horizontal 2800
or
2350
Vertical
controls — The Carrier