Dimplex DAC12AC Especificações descarregar pdf (Página 6)

Dimplex Thermal Solutions 1800-YOU-KOOL

pressure gauges and make note of initial

pressures. The pump may need to run for

several minutes to allow any air to be worked

out of the system before regular flow is

established. Any fluid bypass valves in the

system should be factory set according to

customer specifications but may need slight

adjustment in the field. Consult the factory

before making any adjustments to the

system.

5. Check the entire fluid system for leaks and

ensure there is flow throughout the system.

6. After the pump turns on, the temperature

controller will then analyze the process fluid

temperature and determine whether or not

cooling is needed. If the fluid temperature is

above setpoint, the refrigerant compressor will

commence and begin cooling the fluid.

7. Monitor the chiller to ensure it is performing as

designed. The chiller should be able to

maintain the desired fluid setpoint under a full

load from the process. Slight adjustments may

be necessary according to your specific

process. Please consult a technician at

Dimplex Thermal Solutions before making any

changes to the unit.

8. To turn off the chiller process, move the

selector switch to the OFF position. With the

selector OFF, the temperature controller

display will be on to monitor the process, but

indicate the system is off. Keep the chiller’s

main power-disconnect ON even when the

chiller is not in use, unless it is

used to turn the chiller process off

and on. This keeps the power to

the crankcase heater and prevents

compressor damage when starting again.

If the unit is equipped with a fluid maintenance

heater, the heater will operate if the fluid falls

below the factory setpoint and will operate with

the selector switch off.

MAINTENANCE AND SPARE PARTS:

Proper maintenance is the key to extending

the life of your chiller. Routine checks and a

watchful eye will minimize costly repairs and down

time. Establish a regular schedule of maintenance

depending on the amount the chiller is used and

the environment in which it is used. Environments

that are very dirty or dusty will require more

attention than ones that maintain a cleaner

atmosphere.

This list of maintenance items will help to ensure

an operational chiller:

1. Inspect and clean condenser / air filters

Excessive buildup of dirt, oil, and other debris

on the condenser coil will cause refrigerant

pressures to increase and not allow the unit to

perform to its full capacity. Ensure the fins of

the condenser are clean and not damaged to

keep airflow at a maximum. Use compressed

air at no more than 30PSI to blow out the

condenser in the opposite direction of air flow.

If the unit is equipped with air filters, clean

them with compressed air or wash them out

with water and allow drying before

reinstallation.

2. Check water quality/glycol mixture

The process fluid should be clean and free of

contaminants. If the chiller has a reservoir,

check for debris or contaminants which could

reduce the efficiency of your chiller. Check for

normal inlet and outlet fluid pressures through

the chiller. A large pressure differential could

indicate a plugged heat exchanger or dirty

tank. Test the process fluid to ensure proper

freeze and corrosion protection in accordance

with original design specifications. Do not test

the process fluid from the sight glass due to

the lower turnover at that location.

3. Inspect fluid filters

Fluid filters should be clean enough to allow for

proper flow and pressure in the system. An

increased fluid pressure on the system may

indicate a dirty filter. Replacement of fluid

filters should be done at regular intervals to

keep the fluid system clean and free flowing.

Inspect fluid filters shortly after initial start-up

of the chiller and establish a basis for how

frequently they may need to be changed in the

future.

4. Inspect fluid system

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