LEGEND AND NOTES FOR FIG. 58 AND 59

 

 

 

 

 

 

 

 

 

 

LEGEND

 

 

 

 

 

 

 

AHA

--

Adjustable,

 

Heat

Anticipator

SN

--

Sensor

 

 

 

 

 

BKR W/AT --

Breaks

 

with Amp

Turns

 

TB

--

Terminal

Block

 

 

C

--

Contactor,

Compressor

 

TC

--

Thermostat

 

Cooling

 

CAP

--

Capacitor

 

 

 

 

 

TH

--

Thermostat

 

Heating

 

CB

--

Circuit

Breaker

 

 

TRAN

--

Transformer

 

 

 

 

CC

--

Cooling

 

Compensator

 

 

 

 

 

 

 

 

 

CLO

--

Compressor

 

Lockout

 

_

 

Terminal

(Marked)

 

COMP

--

Compressor

 

Motor

 

O

 

Terminal

(Unmarked)

 

DM

--

Damper

 

Motor

 

 

 

 

 

 

 

 

 

 

DU

--

Dummy

 

Terminal

 

 

_

 

Terminal

Block

 

 

EQUIP

--

Equipment

 

 

 

Thermostat

 

Splice

 

 

 

 

 

FPT

--

Freeze

 

Protection

 

 

 

 

 

 

FU

--

Fuse

 

 

 

 

 

 

 

 

 

Factory

Wiring

 

 

GND

--

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HPS

--

High-Pressure

Switch

 

_ m--

 

Field Control

Wiring

 

IAQ

--

Indoor

Air Quality

Sensor

 

 

Accessory

or Optional

Wiring

IDM

--

Induced-Draft

Motor

 

 

 

 

 

 

 

 

 

IFM

--

Indoor-Fan

 

Motor

 

 

......m_

 

To indicate

common potential only;

IGC

--

Integrated

Gas Unit Controller

 

 

not to represent

wiring.

 

 

 

 

 

 

 

 

L

--

Light

 

 

 

 

 

 

 

_

 

Economizer

 

Motor

 

LED

--

Light Emitting

Diode

 

 

 

 

 

 

 

 

 

LPS

--

Low-Pressure

Switch

 

_

 

Remote

POT Field Accessory

LS

--

Limit Switch

 

 

 

 

 

 

 

 

 

 

 

 

MGV

--

Main Gas Valve

 

 

 

 

OAT Sensor

 

 

 

NEC

--

National

Electrical Code

 

 

 

 

 

 

 

 

 

OAT

--

Outdoor

Air Temperature

Sensor

_

 

Disch Air Sensor

 

 

OCCUP

--

Occupancy

 

Sensor

 

 

 

RAT Accessory

Sensor

OFC

--

Outdoor-Fan

 

Contactor

 

 

 

 

 

 

 

 

 

OFM

--

Outdoor-Fan

 

Motor

 

 

 

Low Ambient

Lockout

Switch

PL

--

Plug Assembly

 

 

 

 

 

 

 

 

 

 

PMR

--

Phase

Monitor Relay

 

 

 

 

 

 

 

 

 

QT

--

Quadruple

Terminal

 

 

 

 

 

 

 

 

 

RAT

--

Return

 

Air Temperature

Sensor

 

 

 

 

 

 

 

 

RS

--

Rollout

 

Switch

 

 

 

 

 

 

 

 

 

 

NOTES:

1.Compressor and/or fan motor(s) thermally protected three phase motors protected against primary single phasing conditions.

2.If any of the original wire furnished must be replaced, it must be replaced with Type 90 ° C or its equivalent.

3.TRAN1 is wired for 230-v operation. If unit is 208 v, disconnect the black wires from the ORN TRAN wire and reconnect to the RED TRAN wire. Apply wirenuts to wires.

4.CB1,2 Must Trip Amps are equal to or less than 156% FLA. IFCB 140%.

5.The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices; before replacing CLO check these devices.

6.Jumpers are omitted when unit is equipped with economizer.

7.Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single pole, double throw contact. An underlined number signifies a normally closed contact. Plain (no line) number signifies a normally open contact.

8.Remove jumper between RC and RH.

9.620 Ohm, 1 watt, 5% resistor should be removed only when using differential enthalpy or dry bulb.

10.If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded.

11.OAT sensor is shipped inside unit and must be relocated in the field for proper operation.

12.For field-installed remote minimum position POT. remove black wire jumper between P and P1 and set control minimum position POT to the minimum position.

47

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Image 47
Carrier 48TJ016-028 specifications Aha, Bkr W/At

48TJ016-028 specifications

The Carrier 48TJ016-028 is a notable model in the range of packaged rooftop units designed by Carrier, a leader in heating, ventilation, and air conditioning (HVAC) solutions. Tailored specifically for commercial applications, these units provide a blend of efficiency, durability, and reliability, making them suitable for a variety of settings, including offices, retail spaces, and industrial environments.

One of the standout features of the 48TJ series is its energy-efficient performance. Equipped with high-efficiency scroll compressors, these units offer superior cooling capacity while minimizing energy consumption. This aligns with modern sustainability goals, helping businesses reduce their carbon footprint and operational costs. Additionally, the 48TJ units comply with stringent industry standards, such as the ASHRAE 90.1 energy efficiency guidelines, ensuring that users receive a product that meets modern energy performance benchmarks.

The 48TJ016-028 units also include advanced technologies that enhance performance and user comfort. The inclusion of a sophisticated microprocessor control system facilitates precise temperature regulation, allowing for an optimal balance of cooling and heating based on real-time conditions. Moreover, the user-friendly controls make it easy for facility managers to monitor system performance and make adjustments as necessary.

Another notable characteristic of the 48TJ series is its flexible installation options. These rooftop units are designed for easy integration into existing building structures and can be installed on flat or pitched roofs. Their compact design and lightweight construction simplify the installation process while minimizing structural impacts on buildings.

Durability is paramount in the design of the 48TJ units as well. The cabinets are constructed from high-quality materials with corrosion-resistant coatings, ensuring a long lifespan even in harsh environmental conditions. The systems are also equipped with robust insulation to reduce sound levels and improve overall operating efficiency.

Furthermore, the Carrier 48TJ016-028 units offer various options for customization. Users can choose from different airflow configurations, heating options, and accessories, allowing for tailored solutions that meet specific requirements. Whether you are looking for a unit with enhanced filtration, economizer capabilities, or advanced humidity control, the 48TJ series provides the flexibility needed for diverse applications.

In summary, the Carrier 48TJ016-028 units deliver a compelling combination of energy efficiency, advanced technology, and robust construction, making them an ideal choice for commercial HVAC needs. With their versatile features and customizable options, they stand out as reliable solutions for maintaining comfortable indoor environments.