Carrier Official Manual for Gas Heaters: 48HC and 48HCF

Page 30

48HC

Table 5 – Space Sensor Mode

TB3 TERMINAL

 

FIELD CONNECTION

INPUT SIGNAL

 

1

 

 

T55---SEN/T56---SEN

Analog (10k thermistor)

 

2

 

 

RMTOCC

Discrete, 24VAC

 

 

 

 

 

 

 

3

 

 

T55---SEN/T56---SEN

Analog (10k thermistor)

 

 

 

 

 

 

 

4

 

 

CMPSAFE

Discrete, 24VAC

 

5

 

 

T56---SET

Analog (10k thermistor)

 

6

 

 

FSD

Discrete, 24VAC

 

 

 

 

 

 

 

7

 

 

LOOP---PWR

Analog, 24VDC

 

 

 

 

 

 

 

8

 

 

SPS

Discrete, 24VAC

 

9

 

 

IAQ ---SEN

Analog, 4---20mA

 

10

 

 

FILTER

Discrete, 24VAC

 

 

 

 

 

 

11

 

IAQ ---COM/OAQ ---COM/RH ---COM

Analog, 4---20mA

 

 

 

 

 

 

 

12

 

 

CCN + (RED)

Digital, , 5VDC

 

13

 

 

OAQ ---SEN/RH ---SEN

Analog, 4---20mA

 

 

 

 

 

 

 

14

 

 

CCN Gnd (WHT)

Digital, 5VDC

 

 

 

 

 

 

 

15

 

 

AUX OUT(Power Exhaust)

(Output)Discrete 24VAC

 

16

 

 

CCN --- (BLK)

Digital, 5VDC

LEGEND:

 

 

 

 

 

T55

---

Space Temperature Sensor

 

T56

---

Space Temperature Sensor

 

CCN

---

Carrier Comfort Network (communication bus)

 

CMPSAFE

---

Compressor Safety

 

 

FILTER

---

Dirty Filter Switch

 

 

FSD

---

Fire Shutdown

 

 

IAQ

---

Indoor Air Quality (CO2)

 

OAQ

---

Outdoor Air Quality (CO2)

 

RH

---

Relative Humidity

 

 

SFS

---

Supply Fan Status

 

 

 

 

 

 

Table 6 – Thermostat Mode

 

 

 

 

 

TB3 TERMINAL

 

FIELD CONNECTION

 

 

1

 

RAT SEN

 

 

2

 

G

 

 

 

 

 

 

 

3

 

RAT SEN

 

 

 

 

 

 

 

4

 

Y1

 

 

5

 

 

 

 

 

 

 

 

 

6

 

Y2

 

 

 

 

 

 

 

7

 

LOOP---PWR

 

 

8

 

W1

 

 

9

 

IAQ ---SEN

 

 

 

 

 

 

 

10

 

W2

 

 

 

 

 

 

 

11

 

IAQ ---COM/OAQ ---COM/RH ---COM

 

 

12

 

CCN + (RED)

 

 

 

 

 

 

 

13

 

OAQ ---SEN/RH ---SEN

 

 

 

 

 

 

 

14

 

CCN Gnd (WHT)

 

 

15

 

AUX OUT (Power Exhaust)

 

 

16

 

CCN --- (BLK)

LEGEND:

 

 

 

CCN

--- Carrier Comfort Network (communication bus)

G

---

Thermostat Fan

 

IAQ

--- Indoor Air Quality (CO2)

 

OAQ

--- Outdoor Air Quality (CO2)

 

RAT

---

Return Air Temperature

 

RH

---

Relative Humidity

 

W1

--- Thermostat Heat Stage 1

 

W2

--- Thermostat Heat Stage 2

 

Y1

--- Thermostat Cool Stage 1

 

Y2

--- Thermostat Cool Stage 2

 

INPUT SIGNAL

Analog (10k thermistor)

Discrete, 24VAC

Analog (10k thermistor)

Discrete, 24VAC

Discrete, 24VAC Analog, 24VDC Discrete, 24VAC Analog, 4---20mA Discrete, 24VAC Analog, 4---20mA

Digital, 5VDC

Analog, 4---20mA

Digital, 5VDC

(Output) Discrete 24VAC

Digital, 5VDC

30

Image 30
Contents Installation Instructions Safety Considerations Unit Dimensional Drawing 17 Size Unit C10897 Unit Dimensional Drawing 20 and 24 Size Units C10893 Unit Dimensional Drawing 28 Size Unit C10901 Operating Weights Plan for Unit LocationRoof Mount Plan for Sequence of Unit Installation Inspect unitProvide Unit Support Roof Curb Details 17 Size Unit Roof Curb Details 20 and 24 Size Units Roof Curb Details 28 Size Unit Field Fabricate Ductwork Rig and Place UnitInstall Outside Air Hood Factory Option Horizontal Duct ConnectionPositioning on Curb To assemble the outside air hood Install Flue Hood and Combustion Air HoodInstall Gas Piping Gas Supply LineTypical 3/4-in NPT Field Supplied Piping Parts Natural Gas Supply Line Pressure RangesFactory-Option Thru-Base Connections Orifice HoleInstall External Condensate Trap and Line Field Power SupplyMake Electrical Connections Units with Factory-Installed Disconnect All UnitsPowered Convenience Outlet Wiring Thermostat Field Control WiringUnits without Thru-Base Connections Unit without Thru-Base Connection KitTransformer Connection for 208-v Power Supply Typical Low-Voltage Control ConnectionsTo connect the Carrier humidistat HL38MG029 Humidi-MiZerRControl ConnectionsHumidi-MiZer Space RH Controller To connect the Thermidistat device 33CS2PPRH-01OAT RRS Srtn PremierLinkt Factory-Option PremierLink ControllerPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR EconoMi$er2 Supply Air Temperature SAT SensorField Connections PremierLink Sensor UsageSpace Sensor Mode Thermostat ModeConfigure the Unit for Thermostat Mode Space SensorsEconomizer Controls Indoor Air Quality CO2 SensorSpace Relative Humidity Sensor Installation To wire the sensorPower Exhaust output Filter Status SwitchSupply Fan Status Switch Smoke Detector/Fire Shutdown FSDConnecting CCN Bus Color Code Recommendations CCN Communication BusRecommended Cables RTU Open Control System RTU Open Multi-Protocol Control BoardRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR RTU Open Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers Dedicated InputsSpace Temperature SPT Sensors RTU Open T-55 Sensor ConnectionsSpace Relative Humidity Sensor Typical Wiring Relative Humidity Sensors Space or Duct MountedDuct Relative Humidity Sensor Typical Wiring Connecting Discrete InputsCommunication Wiring Protocols GeneralLocal Access RTU Open TroubleshootingOutdoor Air Enthalpy Control LEDsDifferential Enthalpy Control Wiring Return Air Sensor Tube InstallationSmoke Detectors Smoke Detector Test Magnet To install the return air sensor sampling tubeUnit Wire/Fuse or Hacr Breaker Sizing Data Additional Application DataUnit NOM IFM FAN Motor Exhaust Unbalanced 3-Phase Supply Voltage EconoMi$er IV Occupancy Switch Adjust Factory-Installed OptionsInstall Accessories Pre-Start and Start-Up48HC Catalog No 48HC---11SI

48HC specifications

The Carrier 48HC is a highly efficient rooftop HVAC unit designed for commercial applications that prioritize both performance and energy savings. This unit embodies Carrier's commitment to innovation by integrating advanced technologies and features that address the modern demands of building climate control.

One of the standout features of the Carrier 48HC is its exceptional energy efficiency. Employing the latest in variable-speed compressor technology, the unit adjusts its output based on the specific cooling needs of the space, which not only enhances comfort levels but also significantly reduces energy consumption. This feature is crucial for businesses looking to lower their operational costs while minimizing their environmental impact.

The Carrier 48HC is also equipped with a comprehensive range of control options. Through its intelligent control systems, users can utilize features such as demand ventilation, which optimizes indoor air quality while maintaining energy efficiency. The integration with building management systems (BMS) further enhances operational effectiveness, allowing real-time monitoring and adjustments from a centralized point.

Additionally, the 48HC is designed with durability in mind. Its robust construction resists harsh weather conditions and ensures long-lasting performance. The unit features advanced corrosion-resistant materials and coatings, which prolong its lifespan and reduce maintenance needs. This durability makes the 48HC a reliable choice for varying environments, whether it’s an industrial setting or a more delicate commercial space.

The unit’s compact design also deserves mention, as it facilitates easier installation on rooftops without taking up excessive space. The modular design allows for customization, enabling businesses to tailor their systems to fit specific heating and cooling requirements.

In terms of comfort, the Carrier 48HC employs efficient air distribution technology that ensures even airflow throughout the space. This greatly enhances occupant comfort by eliminating hot or cold spots, promoting a consistent indoor climate.

Finally, the 48HC complies with stringent environmental regulations and standards. With options for environmentally-friendly refrigerants, it supports businesses in their sustainability efforts while operating effectively under current regulations.

In summary, the Carrier 48HC stands out in the crowded HVAC market due to its advanced technology, energy efficiency, durability, and adaptability for commercial applications, making it a top choice for those looking to invest in a reliable and effective climate control solution.