Nordyne IQ Drive User manual

Variable Speed Ultra-High

SEER Split System

These units have been designed and

tested for capacity and efﬁciency in

accordance with ARI standards.These

outdoor air conditioning units are de-

signed for use exclusively with select

NORDYNE G6 gas furnaces and select

NORDYNE B5 air handlers equipped

with dedicated matched indoor coils.

IMPORTANT NOTE

This equipment is one part of a total

system designed for maximum ef-

ﬁciency, adequate capacity and total

comfort. The system must function as

intended.Under no circumstances any

part of the system may be substituted

with other components.

User’s Manual

USER’S INFORMATION

IMPORTANT

Read this owner information to become

familiar with the features, capabilities

and use of your system.

Keep this with literature of other

appliances where you have easy

access to it in the future.

If a problem occurs, check instructions

and follow recommendations given.

If these suggestions don’t eliminate

the problem, call your servicing

contractor.

THE iQ Drive SYSTEM

The iQ Drive Air Conditioning System

features fully variable speed compres-

sor technology and variable speed

indoor and outdoor motors.The system

provides variable cooling capacity as

needed modulating over a ﬁve de-

grees Fahrenheit temperature range.

It operates near the nominal rated

capacity at the thermostat set point

and modulates as the temperature

difference between the set point and

the room temperature changes. The

system can operate at approximately

20% higher capacity than the nominal

capacity to provide rapid cooling.Then

as the room temperature decreases,

the system modulates down through

the intermediate capacities until reach-

ing the minimum capacity if the room

temperature reaches 2 degree F below

set point. If the room temperature de-

creases below the set point by 2 degree

F, then the unit will turn off.

The system has a built-in humidity

control that will maintain the humidity

of the home in the desired range. If the

humidity in the home is too low, then

the system will activate the humidiﬁer

(if installed). If the humidity is too high,

then the system will reduce the indoor

blower speed to increase the water

removal from the conditioned space

and lower the humidity.

The iQ Drive System consists of an

outdoor unit, indoor unit, thermostat

controller and connecting lines.

1) The Outdoor Unit:

The outdoor section consists of a

large heat exchanger surface, an

inverter motor drive, a variable speed

rotary compressor, a variable speed

fan motor, and a specially-designed

fan blade housed in sturdy attractive

chassis.

2) The Indoor Unit:

The matched indoor coil may be a

stand alone cased coil intended to be

installed in NORDYNE G6 model gas

furnaces or may be part of a dedicated

NORDYNE B5 model air handler. The

indoor coil is equipped with electronic

expansion valve to precisely control

refrigerant ﬂow over the wide range of

system capacity modulation.

For the stand alone dedicated cased

coil ingas furnace,a furnace conversion

kit is required to allow the addition of

the required system components such

as the variable speed indoor blower

assembly, interface board, upgraded

transformer and the electronic

expansion valve controller. Consult

Installation Instructions provided with

the Indoor Coil and the Conversion Kit

for details.

For the dedicated Air Handler,

the matched coil and all required

components are included. Consult

Installation Instructions provided with

the Air Handler Unit for details.

3) System Thermostat Controller:

The system controller is the master

component that communicates with

and controls the remaining system

components. The inverter in the

outdoor unit receives signals from

compressor, heat exchanger, fan motor

and outdoor ambient sensor which

are communicated to the controller

via connections to the indoor interface

board. The controller responds back

with appropriate messages for each

device operation command.

The controller communicates with the

indoor section via the indoor interface

board which is powered by 24 VAC

from the transformer in the furnace

or air handler. Transformer in the gas

furnace MUST be replaced with the

one supplied in the gas furnace blower

conversion kit.

GENERAL INFORMATION

CAUTION:

This unit is charged with R-410A

refrigerant. DO NOT under any

circumstances use any other

refrigerant besides R-410A in this

unit. Use of another refrigerant will

damage this unit.

START UP AND CHECK OUT

WARNING:

Ensure electrical power to the unit is

off prior to performing the following

steps. Failure to do so may cause

personal injury or death.

Outdoor Unit: Ensure the outdoor

coil, the inverter heat sink, and the top

of the unit are free from obstructions

and debris. Furthermore, ensure that

all access and control panel covers

are in place.

Indoor Unit: Consult the installation

instructions of the indoor unit (i.e.; air

handler, indoor coil and furnace) for

details regarding installation. Ensure

wiring is secure and correct.

Air Filters: Ensure air ﬁlters are clean

and in place prior to operating the

equipment. Ensure that the unit has

been properly and securely grounded

and that power supply connections

have been made at both the facility

power interface and outdoor unit.

iQ Drive Controller Thermostat:

The main screen displays indoor and

outdoor temperatures, set points in

cooling and heating, relative humidity

and mode of operation. The controller

thermostat is designed to display infor-

mation screens for use by the installer

and homeowner.The“Installer Settings

Menu Screen”should be accessed only

by qualiﬁed personnel.

The controller screens display all per-

tinent system information in normal

operation.When necessary, important

messages may be sequenced along

the top line to indicate conditions that

need attention. The controller is also

designed to function as an important

service and troubleshooting tool.

iQ Drive ControllerThermostat

Operation:

ADJUSTING TEMPERATURE:

1- Before you can adjust the tempera-

ture, a MODE must be selected. If

you are already in Heating or Cool-

ing mode, skip to step 5.

2- To select a MODE, use the keypad

arrows to scroll to MODE, then press

the center button on the keypad to

enter the operating mode menu.

3- Select the desired mode by scroll

ing up and down arrows, then press

center button.

4- The main menu appears and the

view displays the mode selected,

indoor temperature and outdoor

temperature.

5- Use the up and down arrows to set

desired temperature, then press

center button to save.

SETTING DATE AND TIME:

1- From the main menu screen, scroll to

menu and press the center button.

2- Select “SET DATE AND TIME”.

3- If your area observes daylight sav-

ing time, select “AUTO DAYLIGHT

SAVING”, scroll to “ON”, then press

center button to save. You will be

returned to “SET DATE AND TIME”

menu. Scroll to “SET DATE AND

TIME” and press the center but-

ton.

4- Set Month, Day, Year, Hour and

Minute by using the up and down

arrows followd by center button to

save.

5- Return to main menu by pressing

the left arrow.

HOLD SETTING (Vacation & Per-

manent)

Vacation Hold:

1- From the Main Screen, scroll to

MENU and press center button.

2- Select HOLD, VACATION

3- First, the controller prompts you for

a temperature to hold. If you are in

AUTO Mode, you will be prompted

for both heating and cooling setting.

Use up and down arrows to select

desired temperatures and press

center button.

4- Next, it will prompt you for a date

and time when you wish to return

to programmed operation. Specify

date and time using up and down ar-

rows.Returning to the main screen,

you will see in the upper part of

screen alternating HOLD TIL date

and time you speciﬁed and actual

day and time.

5- To cancel this hold, scroll to CAN-

CEL HOLD from the main menu

and press center button.

PERMANENT HOLD:

1- From the Main Screen, scroll to

MENU and press center button.

2- Select HOLD, PERMANENT

3- The controller prompts you for a

temperature to hold. If you are in

AUTO Mode, you will be prompted

for both heating and cooling setting.

Use up and down arrows to select

desired temperatures and press

center button.

4- Returning to the main screen, you

will see in the upper part of screen

alternating PERMANENT HOLD

and and actual day and time.You can

adjust to permanent hol temperature

at will, and the temperature selected

will remain until the permanent hold

is cancelled.

5- To cancel this hold, scroll to CAN-

CEL HOLD from the main menu and

press center button. This will revert

to the programmed settings.

FAN OPERATION:

The controller can operate the fan in

three ways:

AUTO: Fan is on only during heating

and coolong modes.

ON: Fan is always on.

PROGRAMMED FAN: Fan follows the

program set in the program screen.

1- From the Main Screen, scroll to

MENU and press center button.

2- Select FAN.

3- Select the operation desired.

CHANGING MODE:

1- From the main screen, select

MODE.

2- Select the operation mode required

and press center button.

PROGRAMMING CONTROLLER:

Programming a day or series of days:

1- From the main screen, scroll to

MENU and press center button.

2- Select PROGRAM.

3- You can program each day differently

by going through each day or you

can program everyday the same

by scrolling to EVERYDAY.You can

program weekdays and weekends

by selecting the appropriate menu

item.

4- To program everyday the same,

select EVERYDAY and press center

button.

5- Using the arrows, program all set-

tings, scroll down to SAVE and press

center button

MAIN SCREEN:

The iQ Drive controller Thermostat

main screen displays system normal

operating information. It displays Out-

door and Indoor temperatures, Set

points in cooling and heating, humidity

and mode of operation for system and

indoor fan. In addition, it displays ﬁve

options to select from:

RH Option: Screen displays humidity

conditions.

If your system is equipped with a

humidiﬁer, you may select one of the

available options:

Humidiﬁer Only.

Dehumidiﬁer Only.

Both.

None.

TEMP Option:

Select this option to temporarily over-

ride program setting until next program

interval is activated.

MODE Option:

Select this option to choose operating

mode (Cool, Heat, Auto or off).

FAN Option:

Select this option to set desired indoor

blower operation mode (Auto, On or

Programmed).

MENU Option:

Select “MENU” option to input the fol-

lowing: Set Date & Time, Hold Temp

info, Program of Operation, Fan, Mode,

Settings and Security Lockout).

Note:“Fan”and“Mode”may be selected

from Main Screen directly.

Use SETTINGS screen to scroll

through options such as:

SCREEN SETTINGS to set “Temp

scale”, “Clock setting”, “Language”,

“Contrast” and “Backlight on Time”.

OFFSET screen to Set temperature

offsets, humidity offset, heat anticipator

and heat differential.

AUTO CHANGEOVER:Select“Auto or

Manual Change” and select the “Auto

ChangeoverTime”to input desired time

interval between cooling and heating

changeover.

PROGRAM SETTINGS:

Select Smart Recovery feature to save

energy by gradually adjusting tem-

perature when time for a programmed

temperature change is anticipated.

EVENTS PER DAY:

Select to set the number of scheduled

setpoints intervals per day. You may

select from 2- Business, 2- Residential

or 4- Residential (default).

COOLING LOCKOUT:

Select to restrict cooling operation if

outdoor temperature is below certain

point. Ranges are None (default), 45F,

50F or 55F.

INTERMITTENT FAN:

Select to overcome variation of tem-

perature and air stratiﬁcation that may

be especially pronounced during mild

outdoor conditions. If the fan hasn’t

been ON for an hour, start cycling the

fan based on selected intervals.Select

from OFF, 5 to 20 minutes in 5 minute

increments and press center button.

Next, select the amount of time the fan

is to be off. Range is from 0 minutes

to 40 minutes in 5 minute increments.

Press center button to save and return

to the setting menu screens. The fan

will continue to cycle until a call for

cooling or heating is energized.

SERVICE INFORMATION:This screen

lists components status and faults if

any.Scroll up and down to obtain“Fault

Status” showing active fault and last 5

faults, “Compressor Status”, “Outdoor

fan Status”, “Indoor fan Status”, “Tem-

perature Status” and option to “Clear

Fault History”.

SECURITY LOCKOUT: Select from

“Temp Adjust Only” or “Total Keypad

Lockout” options.

A PIN number will be required. Use

the up, down and right arrows to select

your pin number. Press the center but-

ton to save. Screen will display locked

and return to main screen which will

alternate between “Locked” and the

“date and time”. If “Temp Adjust Only”

is selected, you will be able to adjust

set points.For any other operations, the

PIN will be required. Once unlocked,

you need to set up a pin number again

to lockout the controller.

OPERATING INSTRUCTIONS

To Operate System in Cooling:

From MODE Screen, select AUTO

or COOL. From Main Screen use the

down arrow to set cooling temperature

below room temperature.Verify that the

indoor fan calibration is performed and

that system starts running. To set sys-

tem operation, select MENU from the

Main Screen and follow the instructions

listed under previous section.

To Operate Furnace in Heating:

From MODE Screen, select AUTO or

HEAT. From Main Screen use the up

arrow to set heating temperature above

room temperature. If system has been

properly conﬁgured, heating will start

to operate.

To Shut Off the System:

The system is designed to continuously

operate within a wide range of speeds

to provide ultimate comfort, adequate

matched to load capacity and maximum

efﬁciency.It will turn off automatically if

required. However if there is a need to

shut off the system, select OFF from

Operating Mode Screen.

To Operate Indoor Blower Only:

SelectFANfromMAINmenuscreen,then

select ON for continuous blower opera-

tion or Programmed Fan for intermittent

option.

NOTE:The controller is programmed to

start a fan calibration occurrence every

week and every time the power is lost

for more than 8 hours. This function

starts the indoor blower and calibrates

air volume to motor speed.

TO MAINTAIN SYSTEM:

CAUTION:

Be certain the electrical power to the

outdoor unit and the indoor unit is

disconnectedbeforedoingthefollowing

recommended maintenance.

1- Regularly, clean or replace the

indoor air ﬁlter at the recommended

intervals set by the installer and

displayed on the controller screen

when due for replacement.

2- Remove any leaves and grass

clippings from the outdoor unit.

3- Check for any obstructions to the

outdoor unit.

Before calling for service, be certain:

1- The unit controller is properly set

and programmed.

2- The unit disconnect fuses are

in good condition, and electrical

power to the unit is turned on.

SYSTEM PROTECTION MEA-

SURES

The inverter driver is designed to pro-

vide a full scale of protection measures

against conditions that may cause

compressor and/or other components

failure. When the protective function

is triggered, the inverter shuts down

the unit and communicates the fault

description to the thermostat control-

ler which will display an error code or

component fault status.To release the

trip, the fault cause must be corrected

by qualiﬁed service personnel.

Diagnostics and Troubleshooting:

The thermostat controller is designed

to provide service personnel with

detailed description of faults that may

cause system malfunction, as well

as, messages indicating maintenance

required. Only qualified service

personnel shall get into “Service

Information Menu”screen to investigate

the fault and make the appropriate

correction.

The last ﬁve fault codes are stored in

the thermostat controller memory. If the

same fault code is triggered ﬁve times

sequentially or the fault will damage

the equipment, then the system will

lockout and display the red “SERVICE

NEEDED” screen on the thermostat.

The “SERVICE NEEDED” screen

will display the system information,

generalized fault description, and/or

contractor phone number.

7086040 (Replaces 7085560)

Speciﬁcations and illustrations subject to change

without notice and without incurring obligations.

Printed in U.S.A. (07/06)

¢708604$¤

7086040

INSTALLER: PLEASE LEAVE

THESE INSTALLATION

INSTRUCTIONS WITH THE

HOMEOWNER.

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