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Unitary Products Group

Simplicity

Intelli-

Comfort

™ CONTROL

97585-UAI-A-1004

THE Simplicity

Intelli-

Comfort

™ CONTROL

INTRODUCTION AND OVERVIEW

Welcome to the new Intelli-

Comfort

™ Control, a digital con-

trol system designed specifically for the 3 thru 25 ton single

package rooftop units. The control logic of Intelli-

Comfort

™

extends beyond current control capabilities.

The Intelli-

Comfort

™ digital control performs all of the control

and monitoring functions that were originally done by sepa-

rate discrete relays, controls, interlocking hardware, and a

Thermostat. This reduces manufacturing, service, and main-

tenance costs. The Intelli-

Comfort

™ digital controller

includes sophisticated control of the individual components of

the HVAC cooling/heating unit, and has built-in rules that pro-

tect those components and optimize the control to its environ-

ment. The cooling and heating modes are protected against

short cycling, slugging, multiple restarts, etc.

In the Intelli-

Comfort

™ control, there are:

• a list of user-selected option settings and setpoints

recorded within the control;

• inputs monitored by the Intelli-

Comfort

™;

• specific fixed rules and timings built in to the control

• outputs to compressors and heat via the Simplicity

control, economizers, and other options.

Intelli-

Comfort

™ has a real-time clock function, with mini-

mum of ten hours ‘Time-of-day retention’ with unit power off.

If connected to a network, the control requests an address by

a press of the Address button.

DIAGNOSTICS VIA LED

There is an LED on the board that shows the status of the

control and alarms (see Status LED Table).

When the Alarm button

is pressed and released one time

within five seconds, it will re-enunciate the last five Alarms.

When this button is pressed and released two times within

five seconds, it will clear all stored alarms.

The error details for most conditions are stored in summary in

the Intelli-

Comfort

™ Control, along with all data and can be

accessed by a personal computer interface, or Palm Pilot

(Some interfaces still in development).

Diagnostics may require patience due to internal timings.

Normal observable conditions are the same - contactor 1M

pulled in, compressor 1 running - but the control does not

identify what it has just done or is about to do. The Intelli-

Comfort

™ control will take action according to its internal

rules. A call for cooling, for example, will be compared with

supply air temperature before energizing a cooling stage.

ERROR HISTORY

The Intelli-

Comfort

™ control stores up to 5 of the most recent

alarms in a First In, First Out (FIFO) manner. As the control

collects alarms, it will overwrite the oldest alarm after the his-

tory buffer becomes full.

Some system errors will initiate a controlling response as well

as being stored in the error memory buffer. See the “Trouble-

shooting” chapter in this manual for a detailed description of

how controller errors are handled.

Data items stored for maintenance / run history, in addition to

Alarms:

• Accumulated run times for each compressor and

heat stage

• Unit model number

• Unit serial number

•Unit Name

DIGITAL LINGO

This training manual is intended to help you with the commis-

sioning process by illustrating the use of tools such as the

control’s digital input and software engineered specifically for

starting up and servicing a rooftop unit.

You should become familiar with some common terminology

and lingo used in the digital controls industry.

If this is your first exposure to the world of digital controls you

may experience a lot of new terms, acronyms and technical

lingo commonly used in the controls industry. For example,

the Intelli-

Comfort

™ input and output hardware points are

described as analog, relating to a continuous scale of value

readings such as a temperature sensor ranging from -40°F to

160°F range, or binary, meaning 2- states, either on or off,

open or closed, true or false, one or zero. The term “digital”

also means two states and its use is often interchanged with

“binary”. These points may be either factory- or field-set.

1 2 3 4 5 6 ... 15 16

Résumé du contenu

Page 1 - ™ CONTROL

Unitary Products GroupSimplicity® Intelli-Comfort™ CONTROL97585-UAI-A-1004THE Simplicity® Intelli-Comfort™ CONTROLINTRODUCTION AND OVERVIEWWelcome to

Page 2 - ANALOG TO DIGITAL CONVERTER

97585-UAI-A-1004Unitary Products Group 10space sensor. The thermostat input will have priority over theSpace Sensor. A unit using a space sensor will

Page 3

97585-UAI-A-100411 Unitary Products GroupThere are two different SAT control algorithms, one usedwhen free cooling is available (economizer operation)

Page 4

97585-UAI-A-1004Unitary Products Group 12CRITERIA FOR ECONOMIZER SUITABLE DECISION SEN-SOR AVAILABILITY:There are three different methods of deciding

Page 5

97585-UAI-A-100413 Unitary Products GroupCONTROL OF COMPRESSORS WITH ECONOMIZERTURNING ON OF COMPRESSOR #1: Never operate com-pression if the Economiz

Page 6

97585-UAI-A-1004Unitary Products Group 14The economizer loading minimizes cycling of heating stage#1 and makes a trade-off between energy and the bene

Page 7 - CONTROLS

97585-UAI-A-100415 Unitary Products GroupNOTE: An added measure of protection against exces-sive SAT during Demand Ventilation Operation is provided b

Page 8 - COMFORT VENTILATION MODE

Page 9

97585-UAI-A-1004Unitary Products Group 2ANALOG TO DIGITAL CONVERTERComputers can only understand a simple binary language.Remember, “binary” means two

Page 10 - - This Sensor

97585-UAI-A-10043 Unitary Products GroupTHE Intelli-Comfort™ CONTROLLERIntelli-Comfort™ is a proprietary, microprocessor-based con-troller for use in

Page 11

97585-UAI-A-1004Unitary Products Group 4necessary. The linear ranging for IAQ sensor input is from 0to 10,000 ppm. The Demand Ventilation setpoint is

Page 12 - F and 1

97585-UAI-A-10045 Unitary Products GroupECONOMIZER SECOND STAGE SETPOINT - (50°F) - Iden-tifies what Supply Air Temperature to maintain for a call for

Page 13

97585-UAI-A-1004Unitary Products Group 6HEATING LOCKOUT ON OAT - (75°F) - Identifies the Out-side Air Temperature Setpoint the control will use to loc

Page 14 - DEMAND VENTILATION

97585-UAI-A-10047 Unitary Products GroupThis parameter is adjustable from 0 to 240 minutes. Thedefault is 60 minutes.If the control senses this input

Page 15

97585-UAI-A-1004Unitary Products Group 8When the control is running the fan and the APS has alreadybeen proven, and then it opens, the control will wa

Page 16 - SYSTEM ERRORS

97585-UAI-A-10049 Unitary Products Group• If the OAT is below the specified SAT band low set-point ("Comfort Ventilation Lower Setpoint"), t

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