McQuay PDAE Instructions d'exploitation télécharger pdf (Page 16)

IM 950-1 / Page 16 of 38

Controls

Standard Digital Touchpad Control

Indoor and Outdoor Fan Operation

The indoor fan can be set to operate on High

or Low speed with the Fan Speed Button on the

touchpad. It can also be set for Continuous or Cycle

operation on the touchpad. When set for Continuous,

the “CONT” LED will be on and the fan will run

continuously. When set for Cycle, the “CYCLE” LED

will be on and the fan will turn on at a call for heat or

cooling.

Fan Cycle Operation

On a call for Heating or Cooling, the indoor fan

and the heating source or the compressor will be

activated. When the call is satised and the heating

source or the compressor is deactivated, the indoor fan

will repeatedly run for 2 minutes on and the number

of minutes selected on the PC Board off, until the next

cut-in cycle. The number of cycles with timing as

described above is determined based on the OFF FAN

CYCLE jumper setting.

Remote T’Stat Mode

The unit can be jumper congured to take

commands from a Remote Thermostat. The Remote

Thermostat will call for Heat and Cool through the

electronic controller.

The Remote T’stat will control through the board

the work of the compressor, indoor and outdoor

fans, the reversing valve, and the heater

2. System will run in Cool mode when Y signal is

high. In cool mode compressor (therefore

outdoor fan) shall turn on

3. Cold start feature (see Modes of Operation – Cold

Start), Cool dry mode (see Cold Dry Mode) and

Sleep feature (see Sleep Feature) are not available

in Remote T’stat cool mode

Operation

Memory Recall

The digital control shall start with the last settings

used prior to power down. These settings are saved in a

non-volatile memory. Factory set mode is OFF.

On/Off Triggering

Control can be turned On/Off via LUI, Remote

T’stat, or Sleep feature. The control will show the

temperature set point when the mode is Cool, Cool

Dry, or Heat. The display will be blank in Fan mode.

1. On/Off triggering with LUI

Control shall turn On or Of

f when the On/Off

button is pressed in LUI. Once turned on control

shall start on the last mode used before it was

turned Off.

2. On/Off triggering with the Remote T’stat

Control shall be turned On if it was Of

f from the

Remote T’stat when it is set up to be controlled by

a Remote T’stat. A call for heat or cool from the

Remote T’stat will be used to turn the control on.

Control remains on until manually turned Off.

3. On/Off triggering with the Sleep feature

Sleep feature works in combination with the

Timer

setting. Sleep time setting shall be user adjustable

from 1 to 15 hours via the Touchpad. The timer

will count down and when it reaches “0” it will

turn the control Off if control was previously On

and vice versa, if it was Off it will turn On after

time expires. As mentioned in

protections section

of this spec the Sleep operation is overridden by

room freeze protection.

Control Off

When the control is in the Off Mode, relay outputs

will be disabled with the exception of the indoor

fan (blower). It will stay on to meet the Hot Keep

specication. Indicator LED’s are all off.

Temperature Range

The maximum operating temperature range is

selectable via the Touchpad and is 60°F to 85°F with

the limits included. The Remote Thermostat selectable

operating range is 60°F to 90°F with limits included.

The range is set in the Set-up menu.

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McQuay PDAE Instructions d'exploitation Page 16

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