Integrated Gas Control (IGC) Board

The IGC is provided on gas heat units. (See Fig. 21 and Table 24.) The IGC controls the direct spark ignition system and monitors the rollout switch, limit switch, and induced-draft motor Hall Effect switch.

RED LED-STATUS

The IGC is equipped with an LED (light-emitting diode) for diagnostics. See the Troubleshooting section for more information.

48/50PD

 

 

 

 

 

 

C07028

 

Fig. 21 - Integrated Gas Control (IGC) Board

 

 

 

 

Table 24 — IGC Connections

 

 

 

 

 

 

 

 

 

TERMINAL

POINT DESCRIPTION

 

SENSOR LOCATION

 

TYPE OF I/O

CONNECTION

LABEL

 

 

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

 

MBB

 

24 VAC

J2, 2

RS

Rollout switch

 

gas section

 

switch input

J2, 5---6

LS

Limit switch

 

gas 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 request

 

control box

 

relay

J2, 1

GV (W1)

Gas valve (heat stage 1)

 

gas section

 

relay

J2, 12

GV (W2)

Gas Valve (heat stage 2, from MBB)

 

gas section

 

Not on IGC

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Carrier 48/50PD05 manual Integrated Gas Control IGC Board

48/50PD05 specifications

The Carrier 48/50PD05 is a remarkable addition to Carrier's lineup of rooftop units, offering advanced cooling and heating solutions for commercial applications. Designed for medium-sized buildings, this unit is well-suited for both new installations and as a replacement for older systems, thanks to its versatile features and efficient performance.

One of the standout features of the 48/50PD05 is its energy efficiency. It incorporates state-of-the-art technology to achieve high Seasonal Energy Efficiency Ratios (SEER) and EER ratings, reducing operational costs while delivering superior comfort. The unit is also compliant with the latest energy regulations, making it an environmentally friendly choice for building owners concerned about sustainability.

The 48/50PD05 is equipped with a highly efficient scroll compressor, which not only enhances performance but also contributes to quiet operation. This is a significant advantage in commercial spaces where noise levels need to be kept in check for comfort and productivity. Additionally, the unit includes advanced airflow design, ensuring even distribution of conditioned air throughout the space.

Technologically, the Carrier 48/50PD05 features Carrier's Infinity Control system, which allows for precise control of indoor climate. This intelligent control mechanism can be integrated with smart building management systems, enabling users to monitor and manage energy use effectively. Wi-Fi connectivity is also available, providing remote access for real-time adjustments and diagnostics.

Durability is another characteristic of the 48/50PD05. Constructed with high-quality materials, the unit withstands various environmental conditions, ensuring longevity and reliability. Moreover, the modular design facilitates easy maintenance, making service procedures efficient and cost-effective.

In addition to cooling, the Carrier 48/50PD05 offers heating capabilities, often utilizing gas or electric heating options that can be tailored to the specific needs of a building. The unit can also be equipped with integrated economizers, allowing for free cooling during suitable outdoor conditions, further enhancing energy savings.

Overall, the Carrier 48/50PD05 stands out as a high-performance HVAC solution that combines efficiency, technology, and durability. It provides building owners with a versatile tool to ensure comfort while minimizing their environmental footprint. With a strong emphasis on energy savings and advanced control features, this rooftop unit is a smart investment for any commercial property.