UNIT START-UP CHECKLIST

MODEL NO.:

 

SERIAL NO: _____________________________________

DATE:

______________

TECHNICIAN: ___________________________________

I. PRE-START-UP:

jVERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j VERIFY INSTALLATION OF OUTDOOR AIR HOOD

j VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD (48PD ONLY)

j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS j VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

j VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE (48PD ONLY) j CHECK GAS PIPING FOR LEAKS (48PD ONLY)

j CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE j CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE j VERIFY THAT UNIT IS LEVEL

j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFY SETSCREW IS TIGHT j VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

j VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION j VERIFY INSTALLATION OF SPACE SENSOR

j VERIFY CONFIGURATION VALUES FOR ELECTRONIC CONTROLS (REFER TO CONTROL SET UP CHECKLIST) j VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS

j VERIFY THAT THE VFD IS IN AUTO MODE

II.START-UP

ELECTRICAL

SUPPLY VOLTAGE

L1-L2

L2-L3

 

L3-L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPRESSOR AMPS—COMPRESSOR A1

L1

 

L2

 

 

L3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

—COMPRESSOR B1

L1

 

L2

 

 

L3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

—COMPRESSOR C1

L1

 

L2

 

 

L3

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC HEAT AMPS (IF EQUIPPED)

L1

 

L2

 

 

L3

 

 

 

 

_______

 

 

 

 

 

 

 

 

 

 

SUPPLY FAN AMPS

 

L1

 

L2

 

 

L3

 

 

 

 

 

 

 

 

 

 

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

 

 

F DB (Dry Bulb)

 

RETURN-AIR TEMPERATURE

 

 

F DB

F WB (Wet Bulb)

 

 

COOLING SUPPLY AIR

 

 

F

 

 

 

 

GAS HEAT SUPPLY AIR (48PG)

 

 

F

 

 

 

 

ELECTRIC HEAT SUPPLY AIR (50PG)

 

 

F

 

 

 

 

 

 

 

PRESSURES

GAS INLET PRESSURE

 

 

IN. WG

 

 

 

GAS MANIFOLD PRESSURE

STAGE NO. 1

 

IN. WG

STAGE NO. 2

 

IN. WG

 

 

REFRIGERANT SUCTION

CIRCUIT A

 

PSIG

 

 

 

 

 

 

 

 

CIRCUIT B

 

PSIG

 

 

 

 

 

 

 

 

 

CIRCUIT C

 

PSIG

 

 

 

 

 

 

 

 

REFRIGERANT DISCHARGE

CIRCUIT A

 

PSIG

 

 

 

 

 

 

 

 

CIRCUIT B

 

PSIG

 

 

 

 

 

 

 

 

 

CIRCUIT C

 

PSIG

 

 

 

 

 

 

 

 

 

 

 

 

 

jVERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

jECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS

48/50PD

105

Page 105
Image 105
Carrier 48/50PD05 manual Unit START-UP Checklist, Pre-Start-Up

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.