Carrier 48TJD User Manual download pdf (Page 2)

Date: Supersedes:

48TJ016,024,028; 50TJ016,024,028,030

SINGLE-PACKAGE COOLING UNITS

WITH GAS HEAT (48TJ) OR

OPTIONAL ELECTRIC HEAT (50TJ)

48TJ

50TJ

Rev.:

-C1SB

JOB NAME: LOCATION:

BUYER: BUYER P.O. # CARRIER #

UNIT NUMBER: MODEL NUMBER:

PERFORMANCE DATA CERTIFIED BY: DATE:

DESCRIPTION

The 48TJ units are one-piece electric cooling/gas heating units and the 50TJ units are one-piece electric cooling/optional electric heating units,

prewired and precharged. The 48/50TJ units have bottom air openings for separate supply and return ductwork. The 48TJD units are low heat

units and the 48TJF units are high heat units. The 48TJL units are low heat units with a stainless steel heat exchanger. The 48TJN units are high

heat units with a stainless steel heat exchanger. The unit is intended for installation on an accessory curb (ordered separately). Horizontal supply

and return connections are also possible with a factory-preassembled, horizontal conversion adapter roof curb accessory (ordered separately).

Bottom discharge on concentric applications requires a transition duct (field-supplied) external to the unit.

STANDARD UNIT FEATURES

Low outdoor temperature cooling operation down to 40 F (4 C) on

48/50TJ016, 35 F (2 C) on 48/50TJ020, 25 F (–4 C) on 48/50TJ024,

and 48 F (9 C) on 48/50TJ028 and 50TJ030 as standard.

Dual freezestat protection is provided as standard.

Dual scroll compressors with internal linebreak protection.

Indoor and outdoor coils constructed of aluminum fins mechanically

bonded to seamless internally grooved copper tubes.

Dual TXVs (thermostatic expansion valves) metering devices.

Liquid line filter driers provided in each refrigeration circuit.

Optional compressor suction and discharge service valves (all).

Manually adjustable outside air intake for up to 25% outside air.

Automatic changeover (when used with an auto-changeover

thermostat).

Single-point gas and electric connections. Disconnect in accordance

with NEC must be field-supplied and installed.

All units utilize 2-stage cooling.

Belt drive adjustable evaporator fan.

Cabinet made of galvanized steel, bonderized and finished with pre-

painted baked enamel.

Cooling systems have low and high-pressure switches. Two-inch

disposable type return-air filters are factory installed.

Provision for alternate end return in base unit. Horizontal supply

available by using accessory curb. EconoMi$erIV may be used with

horizontal supply and return.

Three direct-drive propeller condenser fans with vertical discharge

(48/50TJ016 and 50TJ020).

Two direct-drive propeller condenser fans with vertical discharge

(48/50TJ024 and 028).

Six direct-drive propeller condenser fans with vertical discharge

(50TJ030).

48TJ UNITS ONLY

2-stage gas heat in a single 2-stage gas valve.

Induced draft combustion system with Hall effect sensor to detect

proper operation of induced-draft motor.

Heavy Alumagard™ coated heat exchangers with aluminized steel

burners.

Optional stainless steel heat exchangers.

Heating controls with solid-state direct spark ignition system (pilotless

system) and redundant gas valve. High temperature limit switches and

auto-reset flame rollout switch standard.

Integrated gas control board with built-in diagnostics to determine

error codes and control fan on/off delays for energy savings and maxi-

mum comfort control.

Integrated gas unit controller provides anti-cycle protection for gas

heat operation.

PERFORMANCE DATA

Unit Operating Weight ________________________________ lb/kg

COOLING

Gross Total Capacity ______________________________ Btuh/kW

at Condenser Air Temperature _________________________ F/C

Gross Sensible Capacity ___________________________ Btuh/kW

Compressor Power Input _______________________________ kW

Indoor Entering Air db ___________ F/C wb ____________ F/C

Cfm/L/s___________ External Static Pressure _________ in. wg/Pa

Indoor Fan Motor Size ______________________________ Hp/kW

Exhaust Fan Motor Size _____________________________ Hp/kW

Curb Weight ________________________________________ lb/kg

HEATING

Heating Capacity:

Gas Stage 1 _____________________________________ Btuh/kW

Gas Stage 2 _____________________________________ Btuh/kW

Gas Heating Capacity Total _________________________ Btuh/kW

Electric Stage 1 ______________________________________ kW

Electric Stage 2 ______________________________________ kW

Electric Heating Capacity Total __________________________ kW

1 2 3 4 5 6 7 ... 11 12

Comments to this Manuals

No comments

Carrier 48TJD User Manual Page 2

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 48TJD