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a. The grille protects the condenser coil from damage by large objects without increasing unit clearances.
15. Thru--the--Bottom Utility Connectors:
a. Kit shall provide connectors to permit gas and electrical connections to be brought to the unit through the
basepan.
16. Fan/Filter Status Switch:
a. Provides status of indoor (evaporator) fan (ON/ OFF) or filter (CLEAN/DIRTY). Status shall be displayed over
communication bus when used with direct digital controls or with an indicator light at the thermostat.
17. Outdoor Air Enthalpy Sensor:
a. The outdoor air enthalpy sensor shall be used to provide single enthalpy control. When used in conjunction
with a return air enthalpy sensor, the unit will provide differential enthalpy control. The sensor allows the unit
to determine if outside air is suitable for free cooling.
18. Return Air Enthalpy Sensor:
a. The return air enthalpy sensor shall be used in conjunction with an outdoor air enthalpy sensor to provide dif-
ferential enthalpy control.
19. Indoor Air Quality (CO
2
) Sensor:
a. Shall be able to provide demand ventilation indoor air quality (IAQ) control.
b. The IAQ sensor shall be available in duct mount, wall mount, or wall mount with LED display. The setpoint
shall have adjustment capability.
20. Smoke detectors:
a. Shall be a Four--Wire Controller and Detector.
b. Shall be environmental compensated with differential sensing for reliable, stable, and drift--free sensitivity.
c. Shall use magnet--activated test/reset sensor switches.
d. Shall have tool--less connection terminal access.
e. Shall have a recessed momentary switch for testing and resetting the detector.
f. Controller shall include:
(1.) One set of normally open alarm initiation contacts for connection to an initiating device circuit on a fire
alarm control panel.
(2.) Two Form--C auxiliary alarm relays for interface with rooftop unit or other equipment.
(3.) One Form--C supervision (trouble) relay to control the operation of the Trouble LED on a remote test/reset
station.
(4.) Capable of direct connection to two individual detector modules.
(5.) Can be wired to up to 14 other duct smoke detectors for multiple fan shutdown applications.
21. Winter start kit
a. Shall contain a bypass device around the low pressure switch.
b. Shall be required when mechanical cooling is required down to 25
_
F (--4
_
C).
c. Shall not be required to operate on an economizer when below an outdoor ambient of 40
_
F (4
_
C).
22. Time Guard
a. Shall prevent compressor short cycling by providing a 5--minute delay (
±
2 minutes) before restarting a com-
pressor after shutdown for any reason.
b. One device shall be required per compressor.
23. Electric Heat:
a. Heating Section
(1.) Heater element open coil resistance wire, nickel--chrome alloy, 0.29 inches inside diameter, strung through
ceramic insulators mounted on metal frame. Coil ends are staked and welded to terminal screw slots.
(2.) Heater assemblies are provided with integral fusing for protection of internal heater circuits not exceeding
48 amps each. Auto reset thermo limit controls, magnetic heater contactors (24 v coil) and terminal block
all mounted in electric heater control box (minimum 18 ga galvanized steel) attached to end of heater as-
sembly.
Copyright 2009 Carrier Corp.
S
7310 W. Morris St.
S
Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 04/09
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 50TC---05PD
Replaces: 50TC--- 04PD
50TC
Summary of Contents for 50TC Series
Page 23: ...23 CURBS WEIGHTS DIMENSIONS CHASSIS 1 C08529 Fig 1 Dimensions 50TC 04 07 50TC ...
Page 25: ...25 CURBS WEIGHTS DIMENSIONS CHASSIS 2 C08531 Fig 6 Dimensions 50TC 08 12 50TC ...
Page 27: ...27 CURBS WEIGHTS DIMENSIONS CHASSIS 3 C08533 Fig 11 Dimensions 50TC 14 50TC ...
Page 84: ...84 C08536 Fig 25 2 Stage Cooling Typical Power Diagram 50TC ...
Page 86: ...86 C08576 Fig 27 2 Stage Typical Wiring Diagram 50TC ...