C. Unit Start-Up (cont)

COOLER LOOP PROTECTION IF REQUIRED:

GALLONS (LITERS) OF BRINE ADDED:

PIPING INCLUDES ELECTRIC TAPE HEATERS.

CHECK PRESSURE DROP ACROSS COOLER.

FLUID ENTERING COOLER:

 

PSIG (kPa)

FLUID LEAVING COOLER:

 

PSIG (kPa)

(PSIG DIFFERENCE) x 2.31 = FT OF FLUID PRESSURE DROP = (kPa DIFFERENCE) x .335 = FT OF FLUID PRESSURE DROP =

PLOT COOLER PRESSURE DROP ON PERFORMANCE DATA CHART (LOCATED IN PRODUCT DATA LITERATURE) TO DETERMINE TOTAL GPM (L/s).

TOTAL GPM (L/s) =

 

 

 

 

UNIT'S RATED MIN. GPM (L/s) =

 

 

 

GPM (L/s) PER TON =

 

 

UNIT'S RATED MIN. PRESSURE DROP =

 

 

JOB'S SPECIFIED GPM (L/s) (if available)

 

 

(Refer to product data literature.)

 

 

 

 

 

 

 

 

 

NOTE: IF UNIT HAS LOW FLUID FLOW, FIND SOURCE OF PROBLEM: CHECK FLUID PIPING, IN-LINE FLUID STRAINER, SHUT-OFF VALVES, CHILLED FLUID PUMP ROTATION, ETC.

COOLER LOOP PROTECTION:

GAL. (L) OF BRINE ADDED (IF REQUIRED).

IN-LINE WATER STRAINER INSTALLED ADJACENT TO COOLER FLUID INLET. (REQUIRED FOR 30HW COOLERS.)

YESNO

CONDENSER PROTECTION:

IN-LINE MINIMUM 20-MESH STRAINER INSTALLED ADJACENT TO THE CONDENSER WATER INLET.

YESNO

TO START THE CHILLER: (insert check mark as each item is completed)

PLACE ON-OFF SWITCH IN THE ON POSITION.

ASSUMING THERE IS A CALL FOR CHILLED FLUID, THE COMPRESSOR WILL START UNLOADED AFTER A 6-SECOND TO 5-MINUTE DELAY (DEPENDING ON THE TIMING LOGIC).

THE LOW-PRESSURE SWITCH (ALL UNITS) AND OIL-PRESSURE SWITCH (30HL, HWA UNITS Ð ACCESSORY ON 30HK, HWB, HWC, HWS UNITS) ARE BYPASSED FOR 2 MINUTES.

IF ADDITIONAL CAPACITY IS REQUIRED AFTER THE 2-MINUTE PERIOD, COMPRESSOR WILL LOAD UP.

MEASURE THE FOLLOWING: WHILE MACHINE IS IN STABLE OPERATING CONDITION.

SUCTION PRESSURE

SUCTION LINE TEMP.

SUCTION SUPERHEAT

DISCHARGE PRESSURE

DISCHARGE LINE TEMP.

DISCHARGE SUPERHEAT

CHECK AND ADJUST SUCTION SUPERHEAT (9 to 11 F [5 to 6 C]).

CL-3

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Carrier 30HK040-060, 30HL050 Unit Start-Up, Fluid Entering Cooler, Fluid Leaving Cooler, Units Rated MIN. Pressure Drop =
Page 42 Page 44

30HK040-060, 060, 30HL050, 30HW018-040 specifications

The Carrier 30HW018-040, 30HL050, 060, and 30HK040-060 series represents a range of advanced rooftop units designed to meet the diverse heating and cooling needs of commercial buildings. Renowned for their efficiency and performance, these units incorporate cutting-edge technologies to improve operational effectiveness and reduce energy consumption.

One of the standout features of the Carrier 30HW series is its high-efficiency scroll compressors, which are engineered to provide exceptional cooling capacity while minimizing energy usage. These compressors operate quietly and ensure smooth performance across varying loads. Additionally, the units utilize advanced microprocessor controls that enhance system efficiency by enabling precise temperature regulation and optimizing energy consumption based on real-time weather conditions.

Another important aspect of the 30HL series is its ability to provide reliable heating and cooling capabilities even in extreme weather conditions. With robust heat exchangers and a range of variable-speed fans, these units can efficiently circulate air while maintaining optimal indoor comfort levels. Variable-speed technology not only enhances comfort but also improves energy savings, as the system can adjust its output based on occupancy and external temperature fluctuations.

The 30HK series, specifically designed for high-performance applications, features enhanced filtration systems which improve indoor air quality. These systems are capable of accommodating various filter types, ensuring that airborne contaminants are effectively captured. This makes the 30HK a suitable choice for environments where air quality is a priority, such as schools, hospitals, and commercial offices.

Moreover, all units in the 30HW, 30HL, and 30HK series are designed with ease of maintenance in mind. Removable panels and easy access points allow for quick servicing and reduces downtime. The compact design also ensures that installation is straightforward, making them a preferred choice for many contractors.

In summary, Carrier's 30HW018-040, 30HL050, 060, and 30HK040-060 series are integral solutions in the HVAC market, combining energy efficiency, advanced controls, and superior air quality features. These rooftop units are tailored for commercial applications, providing reliable heating and cooling solutions while prioritizing comfort and sustainability. Through continuous innovation, Carrier remains at the forefront of HVAC technology, ensuring that their products meet the evolving demands of the industry.
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