Daikin WMC Specifications download pdf (Page 59)

Catalog 602-2 59

 Piping

 Tank

 Heater

 Cooler

 Controls

 Valves

3. Manufacturer shall be responsible for covering all costs associated with annual oil and oil filter

changes plus oil analysis as required

D. Vibration Isolation

1. Provide neoprene waffle-type vibration isolators for each corner of the unit.

E. Power Connections

1. Power connection shall be [single point to a factory-mounted disconnect switch] OR [multipoint to

each compressor power panel on two-compressor units].

F. Chiller Control

1. The unit shall have a microprocessor-based control system consisting of a 15-inch VGA touch-

screen operator interface and a unit controller.

2. The touch-screen shall display the unit operating parameters, accept setpoint changes (multi-level

password protected) and be capable of resetting faults and alarms. The following parameters shall

be displayed on the home screen and also as trend curves on the trend screen:

• Entering and leaving chilled water temperatures

• Entering and leaving condenser water temperatures

• Evaporator saturated refrigerant pressure

• Condenser saturated refrigerant pressure

• Percent of 100% speed (per compressor)

• % of rated load amps for entire unit

3. In addition to the trended items above, all other important real-time operating parameters shall

also be shown on the touch-screen. These items shall be displayed on a chiller graphic showing

each component. At a minimum, the following critical areas must be monitored:

• Compressor actual speed, maximum speed, percent speed

• Liquid line temperature

• Chilled water setpoint

• Compressor and unit state and input and output digital and analog values

4. A fault history shall be displayed using an easy to decipher, color coded set of messages that are

date and time stamped. Time interval scale shall be user selectable as 20 mins, 2 hours, or 8

hours. The alarm history shall be downloadable from the unit's USB port. An operating and

maintenance manual specific for the unit shall be viewable on the screen.

5. All setpoints shall be viewable and changeable (multi-level password protected) on the touch

screen and include setpoint description and range of set values.

6. Automatic corrective action to reduce unnecessary cycling shall be accomplished through

preemptive control of low evaporator or high discharge pressure conditions to keep the unit

operating through abnormal transient conditions.

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Daikin WMC Specifications Page 59