LEGEND FOR FIG. 53 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENT

IMPORTANT: Refer to unit wiring label for actual unit wiring information.

AHA

Adjustable Heat Anticipator

RS

Rollout Switch

C

Contactor, Compressor

SAT

Supply Air Thermostat

CAP

Capacitor

SEN

Sensor

CC

Cooling Compensator

SW1

Switch Fully Open

COMP

Compressor Motor

SW2

Switch Fully Closed

D

Diode

SW3

Switch Min. Vent Position

EC

Enthalpy Control

SW4

Switch Max. Vent Position

ECON

Economizer

TC

Thermostat-Cooling

EPS

Emergency Power Supply

TDR

Time-Delay Relay

 

 

(Nine Volt Battery)

TH

Thermostat-Heating

EQUIP

Equipment

TRAN

Transformer

ER

Economizer Relay

 

 

Field Splice

FPT

Freeze Up Protection Thermostat

 

 

 

FU

Fuse

 

 

Marked Wire

GND

Ground

 

 

Terminal (Marked)

HPS

High-Pressure Switch

 

 

HS

Hall-Effect Sensor

 

 

Terminal (Unmarked)

I

Ignitor

 

 

 

 

 

IDM

Induced-Draft Motor

 

 

Terminal Block

IFC

Indoor Fan Contactor

 

 

 

IFM

Indoor (Evaporator) Fan Motor

 

 

Splice

IGC

Integrated Gas Unit Controller

 

 

Splice (Marked)

LPS

Low-Pressure/Loss-of-Charge Switch

 

 

LS

Limit Switch

 

 

Factory Wiring

MGV

Main Gas Valve

 

 

 

 

 

MTR

Motor

 

 

Field Control Wiring

OAT

Outdoor-Air Thermostat

 

 

Field Power Wiring

OFM

Outdoor (Condenser) Fan Motor

 

 

OLR

Overload Relay

 

 

Accessory or Optional Wiring

PL

Plug Assembly

 

 

 

 

To indicate common potential only;

QT

Quadruple Terminal

 

 

 

 

not to represent wiring.

R

Relay

 

 

 

 

 

NOTES:

1.If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

2.Three-phase motors are protected under primary single-phasing conditions.

3.Thermostat: HH07AT170, 172, 174 and P272-2783 Subbase: HH93AZ176, 178 and P272-1882, 1883.

4.Set heat anticipator at .14 amp. For units with 2 stages of heating, set stage two anticipator at

.14 amp.

5.Use copper conductors only.

6.TRAN is wired for 230-v unit. If unit is to be run with 208-v power supply, disconnect BLK wire from 230-v tap (ORN) and connect to 208-v tap (RED). Insulate end of 230-v tap.

49

Page 49
Image 49
Carrier 48TF004-007 Sat, Cap, Sen, SW1, Comp, SW2, SW3, SW4, Econ, Eps, Tdr, Equip, Tran, Fpt, Gnd, Hps, Idm, Ifm, Igc

48TF004-007 specifications

The Carrier 48TF004-007 is part of the brand's renowned rooftop unit series, designed to deliver efficient, reliable performance for commercial applications. Ideal for spaces such as offices, retail stores, and small manufacturing facilities, these units encapsulate advanced technology to enhance indoor air quality and optimize climate control.

One of the standout features of the Carrier 48TF004-007 units is their variable speed compressor technology. This innovation not only allows for precise temperature control but also reduces energy consumption by modulating the compressor's speed according to the cooling or heating demand. By operating at lower speeds during less demanding conditions, these units significantly decrease energy usage compared to traditional single-speed compressors, contributing to lower utility bills and a reduced carbon footprint.

Energy efficiency is further enhanced with the inclusion of high-performance scroll compressors, which are known for their reliable operation and quiet performance. Coupled with an Energy Efficiency Ratio (EER) that meets or exceeds industry standards, these systems are designed to offer economical operation without sacrificing comfort.

Incorporating smart controls and connectivity features, the Carrier 48TF004-007 units allow for easy integration into building management systems (BMS). This enhances the ability to monitor and manage energy usage in real time, further promoting efficiency. The units are also compatible with various thermostat options, allowing for user-friendly operation and customization of settings.

Another significant characteristic of the Carrier 48TF004-007 is its durable construction. Built with galvanized steel and powder-coated finishes, these units are designed to withstand the rigors of outdoor installation, ensuring long-lasting performance even in harsh weather conditions. Additionally, the units come equipped with advanced filtration systems that help improve indoor air quality by effectively removing dust, allergens, and other particulate matter from the air.

Maintenance is simplified with the Carrier 48TF004-007, providing easy access to vital components, which supports reduced downtime and service costs. The units also feature low operating sound levels, making them suitable for noise-sensitive applications.

In conclusion, the Carrier 48TF004-007 rooftop units stand out for their energy efficiency, advanced technology, durability, and ease of maintenance, making them an excellent choice for any commercial space looking to enhance comfort while effectively managing operational costs.