Carrier 50RHE006-060 specifications Operation, Units with Aquazone Complete C Control

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Antifreeze — In areas where entering loop temperatures drop below 4.4 C or where piping will be routed through areas subject to freezing, antifreeze is needed.

Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 8.3 K below the lowest expected entering loop temperature. For example, if the lowest expected entering loop temperature is –1.1 C, the leaving loop temperature would be –5.6 to –3.9 C. Therefore, the freeze protection should be at –9.4 C (–1.1 C –8.3 C = –9.4 C).

IMPORTANT: All alcohols should be pre-mixed and pumped from a reservoir outside of the building or introduced under water level to prevent fuming.

Calculate the total volume of fluid in the piping system. See Table 11. Use the percentage by volume in Table 12 to deter- mine the amount of antifreeze to use. Antifreeze concentration should be checked from a well mixed sample using a hydrome- ter to measure specific gravity.

FREEZE PROTECTION SELECTION — The –1.1 C FP1 factory setting (water) should be used to avoid freeze damage to the unit.

Once antifreeze is selected, the JW3 jumper (FP1) should be clipped on the control to select the low temperature (anti- freeze 13 F) set point to avoid nuisance faults.

Table 11 — Approximate Fluid Volume (L)

per 30 m of Pipe

PIPE

DIAMETER (in.)

VOLUME (l)

Copper

1

 

 

15.5

 

1.25

 

24.2

 

1.5

 

34.8

Rubber Hose

1

 

 

14.7

Polyethylene

3/

IPS SDR11

10.6

 

4

 

 

17.0

 

1 IPS SDR11

 

11/

4

IPS SDR11

30.0

 

1/

IPS SDR11

41.2

 

2

 

 

68.1

 

2 IPS SDR11

 

11/

4

IPS SCH40

31.4

 

11/

IPS SCH40

41.2

 

2

 

2 IPS SCH40

64.3

LEGEND

IPS — Internal Pipe Size

SCH — Schedule

SDR — Standard Dimensional Ratio

NOTE: Volume of heat exchanger is approximately 3.78 liters.

Table 12 — Antifreeze Percentages by Volume

 

MINIMUM TEMPERATURE FOR

ANTIFREEZE

FREEZE PROTECTION (C)

 

 

–12

–9

–7

 

–4

Methanol (%)

25

21

16

 

10

100% USP Food Grade

38

30

22

 

15

Propylene Glycol (%)

 

 

 

 

 

 

Cooling Tower/Boiler Systems — These systems typ- ically use a common loop temperature maintained at 15.6 to

32.2C. Carrier recommends using a closed circuit evaporative cooling tower with a secondary heat exchanger between the tower and the water loop. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary. The optional cupronickel heat exchanger must also be used in this case.

Ground Coupled, Closed Loop and Plateframe Heat Exchanger Well Systems — These systems al- low water temperatures from –1.1 to 43.3 C. The external loop field is divided up into 51 mm polyethylene supply and return lines. Each line has valves connected in such a way that upon system start-up, each line can be isolated for flushing using only the system pumps. Locate air separation in the piping sys- tem prior to the fluid re-entering the loop field.

OPERATION

Power Up Mode — The unit will not operate until all the inputs, terminals and safety controls are checked for normal operation.

NOTE: The compressor will have a 5-minute anti-short cycle upon power up.

Units with Aquazone™ Complete C Control

STANDBY — Y and W terminals are not active in standby mode, however the O and G terminals may be active, depend- ing on the application. The compressor will be off.

COOLING — Y and O terminals are active in Cooling mode. After power up, the first call to the compressor will initiate a 5 to 80 second random start delay and a 5-minute anti-short cycle protection time delay. After both delays are complete, the compressor is energized.

NOTE: On all subsequent compressor calls the random start delay is omitted.

HEATING STAGE 1 — Terminal Y is active in heating stage 1. After power up, the first call to the compressor will initiate a 5 to 80 second random start delay and a 5-minute anti-short cycle protection time delay. After both delays are complete, the compressor is energized.

NOTE: On all subsequent compressor calls the random start delay is omitted.

HEATING STAGE 2 — To enter Stage 2 mode, terminal W is active (Y is already active). Also, the G terminal must be ac- tive or the W terminal is disregarded. The compressor relay will remain on and EH1 is immediately turned on. EH2 will turn on after 10 minutes of continual stage 2 demand.

NOTE: EH2 will not turn on (or if on, will turn off) if FP1 tem- perature is greater than 7.2 C and FP2 is greater than 43.3 C.

EMERGENCY HEAT — In emergency heat mode, terminal W is active while terminal Y is not. Terminal G must be active or the W terminal is disregarded. EH1 is immediately turned on. EH2 will turn on after 5 minutes of continual emergency heat demand.

Units with Aquazone Deluxe D Control

STANDBY/FAN ONLY — The compressor will be off. The Fan Enable, Fan Speed, and reversing valve (RV) relays will be on if inputs are present. If there is a Fan 1 demand, the Fan Enable will immediately turn on. If there is a Fan 2 demand, the Fan Enable and Fan Speed will immediately turn on.

NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1 and Fan 2 outputs.

HEATING STAGE 1 — In Heating Stage 1 mode, the Fan Enable and Compressor relays are turned on immediately. Once the demand is removed, the relays are turned off and the control reverts to Standby mode. If there is a master/slave or dual compressor application, all compressor relays and related functions will operate per their associated DIP switch 2 setting on S1.

HEATING STAGE 2 — In Heating Stage 2 mode, the Fan Enable and Compressor relays are remain on. The Fan Speed relay is turned on immediately and turned off immediately once the demand is removed. The control reverts to Heating Stage 1 mode. If there is a master/slave or dual compressor application, all compressor relays and related functions will op- erate per their associated DIP switch 2 setting on S1.

HEATING STAGE 3 — In Heating Stage 3 mode, the Fan Enable, Fan Speed and Compressor relays remain on. The EH1 output is turned on immediately. With continuing Heat Stage 3 demand, EH2 will turn on after 10 minutes. EH1 and EH2 are turned off immediately when the Heating Stage 3 demand is re- moved. The control reverts to Heating Stage 2 mode.

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Contents Safety Considerations ContentsGeneral InstallationUnit 50RHE Physical Data Aquazone 50RHE006-060 UnitsRight Return Left ReturnTypical Installation 50RHE Units Conversion Left Return, Side Discharge to Back Discharge 50RHE Units Dimensions mm030,036 042,048Typical Ground-Water Piping Installation Electrical Wiring Water Quality GuidelinesCondition Acceptable Level CAP PSCRVS FP1Comp BMC Loss of Charge Pressure Switch Motorized ValveBlower Motor Capacitor Performance Monitor Blower Relay Sensor, Air Coil Freeze ProtectionTypical Aquazone Deluxe D Control Wiring 3-Phase Unit Electrical Data 50RHE VOLTS-PHASE Voltage Compressor FAN Total MIN MAXUnit Circuit RLA LRA FUSE/HACR FLA50RHE 50RHE Blower PerformanceAirflow Unit SpeedPRE-START-UP Low Voltage Wiring See FigField Selectable Inputs Control Jumper Settings SeeControl Accessory Relay Configurations START-UPOperating Limits Unit Start-Up Heating Mode Unit Start-Up Cooling ModeWater Temperature Change Through Heat Exchanger Cooling Heating50RHE Coaxial Water Pressure Drop Typical Unit Operating Pressures and TemperaturesAntifreeze Percentages by Volume Approximate Fluid Volume L Per 30 m of PipeOperation Units with Aquazone Complete C ControlControl Current LED Status Alarm Relay Operations Control LED Code Fault DescriptionsSystem Test Alarm Relay ServiceDescription Status LED Test LED ESDGravity Flow Method Troubleshooting Refrigerant ChargingAir Coil Fan Motor Removal Fault Heating Cooling Possible Cause Solution TroubleshootingUnit Does Not Operate Page Page Copyright 2004 Carrier Corporation II. START-UP 50RHE R-407C Unit START-UP ChecklistCooling Cycle Analysis Heating Cycle Analysis

50RHE006-060 specifications

The Carrier 50RHE006-060 is a robust commercial rooftop unit designed for efficient heating and cooling in various applications. This model is part of Carrier’s renowned line of HVAC systems, known for their reliability and performance. With a nominal cooling capacity of 5 tons and heating capacity of 6 tons, this unit is suitable for medium-sized commercial spaces such as retail stores, offices, and schools.

One of the standout features of the Carrier 50RHE006-060 is its advanced scroll compressor technology. This type of compressor is recognized for its efficiency and durability, offering quiet operation while minimizing energy consumption. The inclusion of a variable-speed blower motor enhances comfort by providing consistent airflow while also reducing energy costs by adjusting the speed according to the demand.

Another key characteristic is its integrated microprocessor control system, which allows for precise temperature management. This feature not only provides optimal comfort but also ensures energy savings. The system’s controls can be easily integrated with existing building management systems, allowing for seamless operation and monitoring.

The Carrier 50RHE006-060 boasts enhanced insulation properties, which help reduce noise during operation and improve energy efficiency. Its robust design can withstand various weather conditions, making it a reliable choice for rooftop installation. Moreover, it is designed with accessibility in mind, featuring service doors that allow for easy maintenance, reducing downtime and operational costs.

In terms of efficiency, the unit is designed to meet or exceed EPA energy efficiency standards. It utilizes environmentally friendly refrigerants, adhering to regulations aimed at reducing greenhouse gas emissions. Additionally, the design includes a high-efficiency heat exchanger, which maximizes heat transfer and improves overall performance.

The Carrier 50RHE006-060 is also equipped with a dual-stage heat function, allowing it to provide optimal heating for varying weather conditions, ensuring comfort during the colder months. Furthermore, the unit’s design incorporates features such as hot gas bypass for improved dehumidification, making it adaptable to different climates and enhancing indoor air quality.

In summary, the Carrier 50RHE006-060 stands out with its efficient compressor technology, smart control systems, robust construction, and environmentally conscious design. These features make it a top choice for commercial spaces seeking an effective, reliable, and energy-efficient heating and cooling solution.
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