Table 9 – IGC Connections

TERMINAL LABEL

POINT DESCRIPTION

SENSOR LOCATION

TYPE OF I/O

CONNECTION

PIN NUMBER

 

 

 

 

 

 

 

 

 

INPUTS

 

 

 

 

 

 

 

 

 

RT, C

Input power from TRAN 1

control box

24 VAC

 

 

 

 

 

SS

Speed sensor

gas section

analog input

J1, 1-3

 

 

 

 

 

FS, T1

Flame sensor

gas section

switch input

 

 

 

 

 

W

Heat stage 1

LCTB

24 VAC

J2, 2

 

 

 

 

 

RS

Rollout switch

gas section

switch input

J2, 5-6

 

 

 

 

 

LS

Limit switch

fan section

switch input

J2, 7-8

 

 

 

 

 

CS

Centrifugal switch (not used)

switch input

J2, 9-10

 

 

 

 

 

OUTPUTS

 

 

 

 

 

 

 

 

 

L1, CM

Induced draft combustion motor

gas section

line VAC

 

 

 

 

 

 

IFO

Indoor fan

control box

relay

J2, 1

 

 

 

 

 

GV

Gas valve (heat stage 1)

gas section

relay

J2, 11-12

 

 

 

 

 

Table 10 – Orifice Sizes

ORIFICE

CARRIER

DRILL

DRILL SIZE

PART NUMBER

DIA. (in.)

 

 

 

#30

LH32RF129

0.1285

1/8

LH32RF125

0.1250

 

 

 

#31

LH32RF120

0.1200

 

 

 

#32

LH32RF116

0.1160

#33

LH32RF113

0.1130

 

 

 

#34

LH32RF111

0.1110

#35

LH32RF110

0.1100

#36

LH32RF105

0.1065

 

 

 

#37

LH32RF104

0.1040

#38

LH32RF102

0.1015

#39

LH32RF103

0.0995

 

 

 

#40

LH32RF098

0.0980

#41

LH32RF096

0.0960

 

 

 

#42

LH32RF094

0.0935

 

 

 

#43

LH32RF089

0.0890

#44

LH32RF086

0.0860

 

 

 

#45

LH32RF082

0.0820

 

 

 

#46

LH32RF080

0.0810

#47

LH32RF079

0.0785

 

 

 

#48

LH32RF076

0.0760

#49

LH32RF073

0.0730

#50

LH32RF070

0.0700

 

 

 

#51

LH32RF067

0.0670

#52

LH32RF065

0.0635

#53

LH32RF060

0.0595

 

 

 

#54

LH32RF055

0.0550

#55

LH32RF052

0.0520

 

 

 

#56

LH32RF047

0.0465

 

 

 

#57

LH32RF043

0.0430

#58

LH32RF042

0.0420

 

 

 

48TC

29

Page 29
Image 29
Carrier 48TCA04---A12 appendix IGC Connections, Orifice Sizes

48TCA04---A12 specifications

The Carrier 48TCA04---A12 is a high-efficiency rooftop air conditioning unit designed for commercial and industrial applications. Known for its reliability and performance, this model features advanced technologies that cater to diverse climate control needs.

One of the standout features of the Carrier 48TCA04---A12 is its excellent energy efficiency, which adheres to the stringent standards set by the U.S. Environmental Protection Agency. The unit utilizes a highly efficient scroll compressor combined with state-of-the-art heat exchanger technology, allowing it to operate with minimal energy consumption while providing powerful cooling capabilities.

The unit comes equipped with a robust and durable design, built to withstand various environmental conditions. Its weather-resistant cabinet is constructed from high-quality materials, ensuring long-lasting performance even in harsh climates. Additionally, the unit features a galvanized steel structure with a powder-coated finish, further enhancing its resistance to corrosion and wear.

In terms of technologies, the Carrier 48TCA04---A12 incorporates advanced controls that promote optimal performance. The unit supports Carrier's smart connectivity options, facilitating remote monitoring and adjustments via smart devices. This feature ensures convenient energy management and allows maintenance teams to access performance data, leading to proactive service interventions.

Another important characteristic of this unit is its quiet operation. The design includes sound-reducing insulation and a well-engineered airflow system, minimizing noise levels to create a more comfortable indoor environment. This is particularly important for commercial spaces such as offices and retail environments, where a tranquil atmosphere is critical for customer satisfaction and productivity.

The Carrier 48TCA04---A12 also offers diverse application flexibility, making it suitable for various locations, from small retail stores to large warehouses. With several tonnage options available, users can select a model that perfectly aligns with their specific cooling needs. Additionally, the unit can be easily integrated with existing HVAC systems, providing a seamless solution for upgrading or retrofitting older installations.

To sum up, the Carrier 48TCA04---A12 rooftop air conditioning unit stands out due to its exceptional energy efficiency, durable construction, advanced technology, and quiet operation, making it a reliable choice for commercial and industrial cooling solutions. Its flexibility and smart technology integrations ensure that it meets a wide range of climate control requirements effectively.