5.21 - Optional heat reclaim module

Change-over procedure from cooling mode to heat reclaim mode:

•Start-up of the condenser pump

•Verification of the condenser flow switch control contact. If this remains open after one minute of condenser pump operation, the circuit remains in cooling mode and alarm 79 for circuit A (alarm 80 for circuit B) will be activated.

•As soon as the saturated condensing temperature reaches 30°C, the pumpdown sequence is activated.

•Pumpdown: closing of the cooling mode coil shutoff valve. Opening of the drain valve, closing of the EXV valve.

•When the pumpdown pressure reaches the end of the pumpdown threshold, the pumpdown valve is closed and the heat reclaim function is effective.

6 - DIAGNOSTICS - TROUBLESHOOTING

6.1 - General

The PRO-DIALOG Plus control system has many fault tracing aid functions. The local interface and its various menus give access to all unit operating conditions. The test function makes it possible to run a quick test of all devices on the unit. If an operating fault is detected, an alarm is activated and an alarm code is stored in the Alarm menu.

6.2 - Displaying alarms

The alarm LEDs on the summary interface (see section 4.1) give a quick display of the status of each circuit and the unit as a whole.

•A flashing LED shows that the circuit is operating but there is an alarm.

•A steady LED shows that the circuit has been shut down due to a fault.

The Alarm menu on the main interface displays up to 5 fault codes that are active on the unit.

6.3 - Resetting alarms

When the cause of the alarm has been corrected the alarm can be reset, depending on the type, either automatically on return to normal, or manually when action has been taken on the unit. Alarms can be reset even if the unit is running.

This means that an alarm can be reset without stopping the machine. In the event of a power supply interrupt, the unit restarts automatically without the need for an external com- mand. However, any faults active when the supply is inter- rupted are saved and may in certain cases prevent a circuit or a unit from restarting.

A manual reset must be run from the main interface using the following procedure:

RESET OF ACTIVE ALARMS

OPERATION

ITEM NUMBER

ITEM VALUE

PRESS MENU

 

2-DIGIT DISPLAY 4-DIGIT DISPLAY BUTTON LED

Hold down the MENU

 

 

 

 

 

button until the LED

0

 

 

 

 

for alarms lights. The

 

 

 

 

 

4-digit display shows

0

2 ALArM

 

 

 

the number of active

 

 

 

 

 

alarms (2 in this

 

 

 

 

 

example).

 

 

 

 

 

Press the Enter button

0

rESEt ALArM

 

 

 

until "rESEt ALARrM"

 

 

 

 

 

is shown in the 4-digit

 

 

 

 

 

display.

 

 

 

 

 

Press the Enter button

0

Good

 

 

 

again to validate the

 

then, 2 AL

 

 

 

reset. "Good" is dis-

 

then, no ALArM

 

 

 

played for 2 seconds

 

 

 

 

 

then, "2 ALArM" and

 

 

 

 

 

then, "no ALArM".

 

 

 

 

 

32

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Carrier 30GK manual Optional heat reclaim module, Diagnostics Troubleshooting, Displaying alarms, Resetting alarms
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30GK specifications

The Carrier 30GK is a prominent chiller model known for its efficiency and reliability in various commercial and industrial applications. Offering a blend of advanced technology and robust design, the 30GK series caters to diverse cooling needs while maintaining energy efficiency and low operational costs.

One of the standout features of the 30GK is its use of the latest scroll compressor technology. This contributes to its efficient performance, enabling the chiller to operate at optimal levels while minimizing energy consumption. The scroll compressor is known for its quiet operation, which reduces noise pollution, making it an ideal choice for buildings located in noise-sensitive environments.

The 30GK chiller series is equipped with microchannel coil technology, which allows for improved heat exchange efficiency. The microchannel design uses a compact coil structure that enhances refrigerant flow and reduces refrigerant volume, leading to a smaller footprint compared to traditional coil designs. This innovative design not only saves space but also improves the chiller's overall performance.

Another notable characteristic of the Carrier 30GK is its environmental consciousness. The chiller operates using environmentally friendly refrigerants, aligning with modern regulations and sustainability goals. Its design incorporates energy-efficient components that contribute to significant reductions in greenhouse gas emissions, making it suitable for environmentally responsible projects.

Moreover, the 30GK is designed for easy serviceability, with accessible components that simplify maintenance. This feature is particularly important for facility managers seeking to minimize downtime and keep maintenance costs low. The chiller also includes advanced monitoring and control systems, which enable real-time performance tracking and diagnostics, enhancing operational efficiency.

In terms of performance, the 30GK chiller is known for its wide capacity range, making it versatile for various applications. Whether for commercial spaces, industrial processes, or large buildings, the 30GK can meet the cooling demands reliably.

Overall, the Carrier 30GK chiller represents a perfect balance of cutting-edge technology, energy efficiency, and sustainability. Its features make it a leading choice in the market, suited for those looking to invest in high-quality and dependable cooling solutions.
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