Specifications

GUIDE SPECIFICATIONS 7-46 kW DX units

1.08 WATER SENSOR

Units shall be provided with one (1) water sensor. The solid state water sensor shall be mounted under the unit to sense the pres-

ence of water. The sensor shall be connected to the microprocessor panel and activate an audible alarm. The water detector shall

become an integral part of the microprocessor panel and shall display “WATER DETECTED IN UNDER FLOOR AREA” mes-

sage when the sensor is activated.

1.09 CONTROL PANEL

A. The environmental control system shall be furnished with a microprocessor based Data Alarm Processor-III (DAP-III)

panel. The panel shall include unit switching functions and display normal functions and service diagnostics on a 2 row, 80

character backlit liquid crystal display (LCD) in a clear vernacular format. The panel shall allow recall and display of the high

and low temperature for the last 24 hours, high and low humidity for the last 24 hours, current percent of capacity and average

percent of capacity for the last hour of operation for cool 1, reheat, humidiﬁ cation, dehumidiﬁ cation, component runtimes for fan

motor(s), reheat, humidiﬁ cation and dehumidiﬁ cation. Programming shall have multilevel password access to prevent unauthor-

ized access. Programming shall be accomplished entirely from the front of the unit without the need to access, set or program

switches inside the unit (front door of the unit does not need to be opened). Programmable functions shall be entered on ﬂ ash

memory to ensure program retention should power fail. The historical database shall be maintained by battery backup. Multiple

messages shall be displayed by automatically scrolling from each message to the next. Alarm conditions shall be displayed by au-

tomatically scrolling from each message to the next. Alarm conditions, in addition to being displayed, shall enunciate an audible

alarm. A summary relay shall be available for remote alarms. Additional test or service terminal shall not be required for any

functions. The control shall include temperature anticipation, moisture level humidity control and automatic ﬂ ush cycles.

An alarm condition shall continue to be displayed until the malfunction is corrected. Multiple alarms shall be displayed sequen-

tially in order of occurrence and only those alarms, which have not been acknowledged, shall continue to sound an audible alarm.

The Data alarm Processor-III panel shall perform an automatic self-test on system start-up. A user accessible diagnostic program

shall aid in system component trouble shooting by displaying on the unit LCD screen the name of the controlled item, output relay

number, terminal plug and pin number for each controlled item.

B. The following automatic control functions shall be included:

Selectable Control Type Compressor Short Cycle

Selectable Water Under Floor Alarm Action Automatic Reheat Element Rotation

Start Time Delay Automatic or Manual Restart

Temperature Anticipation Humidity Anticipation

Dehumidiﬁ cation Lockout Sequential Load Activation

Energy Saver (Glycol Operation)* Energy Saver Coil Flush Cycle*

Auxiliary Chilled Water Operation* Chilled Water Coil Flush Cycle*

Hot Water Coil Flush Cycle*

C. The following conditions, data and normal functions shall be monitored and displayed:

Temperature Setpoint Humidity Setpoint

Current Temperature Current Humidity

Cooling 1 Dehumidiﬁ cation

Reheat 1, 2, 3 Humidiﬁ cation

Current Percent of Capacity Utilized Current Discharge Temperature*

D. The following switching and control functions shall be included:

System On/Off Switch Menu Selection Buttons

Menu Exit Button Select Buttons

Alarm Silence Button Program Set Button

Manual Override for:

Cool 1, Heat 1, Humidiﬁ cation