Nordyne iQDrive Split System Heat Pump, iQDrive Installation Instructions Manual
Installation Instructions
Split System Heat Pump
The iQ Drive heat pump operates as part of a larger intercommunicating system which provides temperature, air fl ow, and
humidity control for a residence or other similarly sized building. This system includes this outdoor unit, the dedicated iQ
controller (thermostat), and an iQ system-compatible indoor unit, typically an air handler with electric strip heat or a gas
furnace. The system will function only if these components are matched and intended f or use within this system. A complete
list of compatible equipment by model and serial number is available in NORDYNE document 709031, iQ Field Wiring
Installation Instruction. Accessory equipment which may be used with this system includes humidifi ers, electric or electronic
air cleaners, and U/V (ultraviolet) sterilizing lamps.
Refer to the System Operation section below for a complete description of how to use the various features of the system.
In addition to providing the means for operation, the controller also serves as the means for initial system confi guration and
setup, and it provides a considerable amount of information for troubleshooting the system and diagnosing problems.
OTHER REFERENCE DOCUMENTS
• Installation instruction documents for indoor equipment (furnace or air handler, optional humidifi er, etc.)
• iQ Field Wiring Installation Instruction, document 709031, provided in the iQ thermostat/controller kit
• iQ Thermostat/Controller User’s Manual, document 709063, provided in the iQ thermostat/controller kit
• local wiring and building codes
• Nordyne Application Guideline for Refrigerant Lines Over 75 Feet document 044B-0600
• iQ Zone System Zone Thermostat User’s Manual
• iQ Zone System Installation Instructions
TABLE OF CONTENTS
PREP ARATION ....................................................................................................................................................3
Slab Mounting ..................................................................................................................................................3
Roof Mounting ..................................................................................................................................................3
ELECTRICAL CONNECTIONS ...........................................................................................................................3
Electrical Power Wiring ....................................................................................................................................3
Control Circuit Wiring .......................................................................................................................................4
iQ Zone Control Wiring ....................................................................................................................................4
Recheck Wiring ................................................................................................................................................4
REFRIGERANT LINE CONNECTIONS ...............................................................................................................4
Line Design and Routing ..................................................................................................................................4
Brazing .............................................................................................................................................................5
System Evacuation ..........................................................................................................................................5
Refrigerant Charging ........................................................................................................................................5
Alternate Procedure for Charging a Heat Pump in Cooling Mode ...................................................................6
Alternate Procedure for Charging a Heat Pump in Heating Mode ...................................................................6
SYSTEM SETUP USING THE IQ CONTROLLER ...............................................................................................6
General ............................................................................................................................................................6
Screen Navigation ............................................................................................................................................6
The Main Screen ..............................................................................................................................................6
Installer Settings ..............................................................................................................................................7
System Confi guration ..................................................................................................................................7
Accessories .................................................................................................................................................8
Defrost Confi guration ..................................................................................................................................8
Dealer Information .......................................................................................................................................8
Heat Off Delay .............................................................................................................................................9
Altitude Adjust .............................................................................................................................................9
Service T ests ...............................................................................................................................................9
SERVICE INFORMATION Screens ................................................................................................................... 10
Other Confi guration Entries ........................................................................................................................... 11
Minimum Heat Pump Operating Temp ......................................................................................................11
Auto Changeover Time .............................................................................................................................. 12
Date and Time ........................................................................................................................................... 12
Program Schedule vs. Nonprogrammable .................................................................................................12
Dehumidifi cation ........................................................................................................................................12
Humidity Settings ......................................................................................................................................12
Smart Recovery ........................................................................................................................................13
Zone Control ..............................................................................................................................................13
System Operation: Quick Start.......................................................................................................................14
System Startup, Checkout, & Troubleshooting ............................................................................................... 15
SYSTEM DIAGNOSIS & TROUBLESHOOTING ...............................................................................................16
Controller .......................................................................................................................................................16
Outdoor Unit Inverter .....................................................................................................................................16
Outdoor Unit Interface Board (right side small circuit board) ......................................................................... 16
Outdoor Unit EXV Board (left side small circuit board) .................................................................................. 17
Indoor Unit Interface Board (in G6 iQ furnace kit or air handler) ...................................................................17
Indoor Unit EXV Board ...................................................................................................................................17
Indoor Unit Constant CFM Motor Control Board ............................................................................................ 17
Indoor Unit One or Two-Stage G7 Furnace Board .........................................................................................
17
Indoor Unit iQ Modulating Gas Furnace Board .............................................................................................. 17
Airzone Control Board ....................................................................................................................................17
iQ Zone System Confi guration .......................................................................................................................18
Common Troubleshooting Issues ...................................................................................................................18
MAINTENANCE .................................................................................................................................................19
FIGURES & DIAGRAMS .................................................................................................................................... 19
2
PREPARATION
Before proceeding with installation of iQ heat pump equipment,
consult with the distributor and homeowner to confi rm that the
equipment listed on the order is what was ordered, and that
it matches labeling on the equipment packaging.
Next determine (including consultation with the homeowner) the
intended/preferred location for placement of the compressor/
outdoor coil unit. Unit envelope dimensions are shown in
Figure 1.
This heat pump is designed for outdoor installation only.
Unit placement must take into consideration the following
clearances: (a) A minimum of 18 inches must be provided
between each of the four sides and any solid barrier or wall
which might block free inlet air fl ow into the coil. A minimum
clearance of 36 inches is required between multiple units.
(b) The corner of the unit covered by the control access
cover must be clear enough to allow comfortable access by
a serviceperson. (c) The top of the unit must be open and
unobstructed to prevent recirculation of outdoor f an discharge
air, particularly for air conditioning usage. A minimum distance
of 4 feet ov erhead clearance is recommended. Do not locate
the unit in a pit with high walls on all sides.
• Refrigerant lines should NOT be buried. (in concrete or
otherwise)
• Refer to Nordyne Application Guideline for Refrigerant Lines
Over 75 Feet document 044B-0600, for piping details
Once the above inf ormation has been confi rmed and potential
questions regarding location, refrigerant line routing, and
wire routing have been resolv ed, proceed with unpacking the
equipment. It is strongly recommended that inspection of the
hardware be performed prior to bringing it to the installation
site. Inspect for cosmetic as well as functional damage (such
as obvious holes or gaps in tubes and joints, cut or pinched
wires or wire insulation).
V erify that the iQ Drive
®
heat pump unit package includes the
following:
• Coil/compressor/control unit.
• Packet containing installation instructions and one fi lter-drier.
NOTE: The thermostat/controller which is required for
system operation is part of a separately purchased kit.
ELECTRICAL CONNECTIONS
Locate the unit away from o verhangs which would allow water
runoff or ice to fall directly onto the heat pump. Avoid placing
the unit near sidewalks or walkways to avoid possible icing
from defrost cycles. In low temperature climates, place the
unit where it is not directly in prevailing winds. Avoid placing
the heat pump near sleeping quarters or windows. As the unit
goes through defrost cycles, a change in sound will occur.
Slab Mounting
The preferred unit mounting is on an outdoor slab (concrete
or plastic), on the ground, in an area with good drainage
unlikely to be affected b y heavy runoff, ground settling, or deep
snowdrift accumulation. The support slab should be level. If
the area is subject to heavy snowfall or drift accumulation, the
use of a snow stand is recommended as well. Make sure that
the drain holes in the bottom of the unit are not obstructed.
Roof Mounting
The method used for roof mounting should be designed so
as not to overload roof structures nor transmit noise to the
interior of the structure. Refrigerant and electrical lines should
be routed through suitably waterproofed openings to prev ent
leaking into the structure. Make sure that the roof structure
can adequately support the weight of the equipment. Consult
local building codes for rooftop installations.
After a location has tentatively been selected, trace routing
of new (or pre-existing) refrigerant lines (two), and po wer and
control wiring. See further discussion below.
• Maximum recommended length for refrigerant lines: 100 ft.
• Maximum elevation diff erence, compressor base to indoor
coil base (compressor higher): 50 feet NOTE: An oil trap
is required for elevations exceeding 50 feet.
• Maximum elevation diff erence, compressor base to indoor
coil base (compressor lower): 50 feet NOTE: An oil trap is
required for elevations exceeding 50 feet.
W ARNING:
ELECTRIC SHOCK HAZARD
Disconnect all electrical power at main circuit bo x
before wiring electrical power to the outdoor unit.
Failure to follow these instructions may result in
electric shock or death.
Electrical Power Wiring
Electrical power wiring shall comply with the current
provisions of the National Electrical Code (ANSI/NFP A 70) as
supplemented by applicable local building codes . The installer
should become familiar with the wiring diagram before making
electrical connections to the outdoor unit. An equipment
wiring diagram is included in this instruction and inside the
unit control panel cover . Refer to the unit rating label located
on the exterior of the control box cover for operating voltage,
minimum circuit ampacity , and maximum fuse size. See Table
I for wire sizing.
COPPER WIRE SIZE - AWG (1% Voltage Drop)
Supply Circuit Ampacity
15 14 10 8 6
20 12 8 6 4
25 10 8 6 4
30 10 6 4 4
35 8 6 4 3
40 8 6 4 3
45 6 4 3 2
50 6 4 3 2
Wire Sized based on N.E.C. for 60°C type copper conductors
up to 50 51 - 100 101 - 150 151 - 200
Table 1. Copper Wire Ampacity Tables
Supply Wire Length - Ft
3
• A properly siz ed branch circuit and disconnect switch must
be installed where it is easily accessible and within line of
sight of the outdoor unit.
• Remove the control panel cover . Route the power and ground
wires (3 wires, including earth ground) from the disconnect
box to the unit. Use of outdoor shielded conduit (metal
lined Sealtite
®
) is required. The electrical conduit opening
is located on the lower left corner of the control box.
• Connect the power wires to L1 and L2 box lugs of the
contactor, and the ground wire to the grounding lug to the
left of the contactor. See Figures 2 and 3. Only copper wires
should be used.
• Replace the control panel cover before applying power.
Control Circuit Wiring
The heat pump is designed to operate with a 24 VAC Class
II control circuit. Control circuit wiring must comply with the
latest version of the National Electrical Code (ANSI/NFPA
70) as supplemented by local building codes.
In general, 24 VAC control power and communication bus
wiring must be run to interconnect the thermostat/controller,
the indoor unit, and the outdoor unit. The “hub” of this network
and source of the 24 VAC is located within the indoor unit (air
handler or furnace). Refer to iQ Drive System Field Wiring
Instructions, NORDYNE document 709031 shipped with the
controller, for connection of control wires to the indoor unit
and for description of other indoor fi eld wiring, including to
the controller.
Five (5) wires must be run between the indoor unit and the
outdoor unit (2 for 24 VAC pow er and 3 f or communications).
Use one shielded cable (3 or more conductors) for
communications only, and a separate cable or pair of wires
for control power . Refer to wiring diagram Figure 4 and Table
II.
1. Pass the 5 control wires into the hole in the lower right side
of the control panel of the outdoor unit, into the separate
low voltage wiring compartment. See Figures 5 and 6.
2. Locate the 5 corresponding factory-wired leads with
stripped ends. Assure that each of these 5 wires (on the
factory wiring side of the wire connections) loops around
and through the “donut” (toroidal choke). Refer to Figure
7 which shows one wire making a single loop.
3. Connect each of the 5 fi eld-run wires to its factory-wired
counterpar t using a wire nut, as indicated in Figures 4, 5
and 6.
4. Replace the control panel cover before applying power.
IMPORTANT
It is critical that the wires meant to connect to 24
vac control power (RED & GRA Y) are not mistakenly
connected to the communication bus wires (YEL,
WHT , GRN). 24 volts applied to the communication
bus will damage the equipment.
Communication Wiring
Indoor
Interface
Board
Terminal
DX+ YEL YEL
DX- WHT WHT
GND GRN GRN
R (screw)
C (screw)
Indoor
Interface
Board plug
wire color
Control Power Wiring
[no factory
wire]
[no factory
wire]
Outdoor unit
wire color
Outdoor Interface
Board Terminal
(RHS circuit
board)
3 pin 3 wire white
connector plug at
RHS circuit board
terminal
“INDOOR”
RED “R” terminal screw
GRY
(contactor coil,
RHS)
Table 2. Control Wiring to Outdoor iQ Heat Pump Unit
iQ Zone Control Wiring
For iQ Zone systems, fi eld wiring is required to connect the
Airzone control board to the iQ communication bus and to
provide a ground connection for the separate zoning control
and communication network. Refer to the iQ Field Wiring
Instruction document provided in the iQ controller kit for more
details. A 3-wire cable must be run from a splice point in the
iQ communication bus to the one 3-pin connector on the
Airzone control board.
Recheck Wiring
Check that wire routing is correct and connections are secure
for all power and control wiring.
REFRIGERANT LINE CONNECTIONS
Line Design and Routing
Refrigerant lines must be connected by a licensed EPA
certifi ed technician following sound established installation
practice. Once the heat pump location has been determined
and the unit set in place the refrigerant lines should be routed
and connected.
• Refrigerant lines should f ollow a direct path from the indoor
coil to the outdoor unit avoiding sharp bends. When lines
pass through walls, make sure to properly seal and support
them so that vibration is not transmitted to the structure.
• Refrigerant tubing should be supported in a manner which
assures that the tubing will not vibrate or wear as a result
of contact with sharp materials or edges during system
operation.
• Lines must be clean refrigeration-grade copper.
• A void removing caps and plugs from the heat pump or lines
until they are ready to be connected.
• Insulate the vapor line with refrigerant line insulation ¼” wall
thickness or greater.
Proper system performance and oil management depend on
properly selecting the liquid and vapor line sizes. Refer to T able
III for the proper size of fi eld supplied lines. The maximum
allowable refrigerant line length is 100 ft.
4
Liquid
Line
up to 100
ft.
3/8 in.
(10 mm)
3/8 in.
(10 mm)
3/8 in.
(10 mm)
Line Set
Length
-024K Units
-036K Units
-048K Units
Vapor Line
up to 24 ft. 25 to 39 ft. 40 to 75 ft.
3/4 in.
(19 mm)
7/8 in.
(22 mm)
7/8 in.
(22 mm)
3/4 in.
(19 mm)
7/8 in.
(22 mm)
1 1/8 in.
(29 mm)
7/8 in.
(22 mm)
1 1/8 in.
(29 mm)
1 1/8 in.
(29 mm)
75 to 100
ft.
1 1/8 in.
(29 mm)
1 1/8 in.
(29 mm)
1 1/8 in.
(29 mm)
Table 3. Permissible Refrigerant Line Sizes
The maximum vertical elevation between the heat pump and
indoor coil is 50 ft. Systems that require more elevation will
need to have an oil trap installed in the vapor line. Refer to
Nordyne Application Guideline for Refrigerant Lines Over 75
Feet (document 044B-0600) for piping details.
A fi lter drier is supplied with the heat pump. It is required and
recommended that it be installed near the indoor coil.
It is recommended to replace existing refrigerant lines that
were previously used f or an R-22 system. If the lines are not
replaced, they must be properly fl ushed by a licensed EPA
certifi ed technician in accordance with the manufacturer’s
instructions and established procedures.
valves and stop the vacuum pump to look for a rapid loss
of vacuum. Loss of vacuum indicates that there is a leak
in the system. Repeat the leak test if required.
3. Evacuate the system to at least 500 microns to remove
non-condensables and water vapor. Close the manifold
valves and remove the vacuum pump.
4. Connect the refrigerant tank to the center manifold port of
the gauge set. Pressurize the system enough to break the
vacuum.
5. Open both service valves by tur ning the valve stems ¼
turn counterclockwise. The stem will be in line with the
tubes. Replace the stem caps and tighten. Proceed with
Refrigerant Charging section.
W ARNING:
The heat pump system contains liquid and
gaseous refrigerant under pressure. Adjustment
of refrigerant charge should only be done by a
qualifi ed, EPA certifi ed technician thoroughly
familiar with this type of equipment. Under no
circumstances should the homeowner attempt to
install and/or service this equipment. Failure to
comply with this warning could result in equipment
damage, personal injury, or death.
Brazing
Use the appropriate safety equipment while brazing. Items
such as gloves, safety glasses, proper ventilation, and a fi re
extinguisher should be used.
1. Route the refrigerant lines from the indoor coil to the service
valves on the heat pump. Avoid sharp radius bends and
turns.
2. Make sure that the vapor line is properly insulated for the
entire length of the run for maximum system effi ciency.
Improper insulation may also create condensation and result
in water damage to the equipment and building structure.
3. Remove the valv e cores from the heat pump service v alves.
Wrap the valves completely with wet rags to protect them
from overheating during the brazing operation.
4. Connect both the vapor and liquid lines. Tubes should be
round, de-burred and free of debris. Use a phosphorous
and copper or silver brazing alloy f or the joints. Do not use
soft solder with a low melting point.
5. Connect the indoor lines according to the indoor unit
instructions. The indoor coil will require the same alloys
and wet rags to protect the sensors from excessive heat
on the refrigerant lines.
6. Allow the service valves to cool and replace the valve cores .
7. Leak test the connections using low pressure dry nitrogen.
System Evacuation
1. Connect the refr igerant gauge manifold to both the vapor
and liquid service valves. See Figure 8. Connect the center
port to the vacuum pump.
2. Open both manifold valves and start the vacuum pump.
After a short time, it is recommended to close the manifold
Refrigerant Charging
NOTE: The unit must be charged at a fi xed speed setting.
or this purpose the thermostat/controller needs to be wired
and powered prior to charging. Using the thermostat, go
to CHARGE MODE under SERVICE TESTS from the
INSTALLER SETTINGS menu, described later in this
document. Select CHARGE MODE to add or verify system
charge. In the CHARGE MODE screen, HEATING or
COOLING mode may be selected, depending upon which
mode of operation is more appropriate or convenient at the
time of charging.
NOTES:
• The heat pump is factory charged for fi eld installed lines 15
ft. in length with the matching indoor equipment. Adjustments
to the refrigerant charge will be required for other length
and tube sizes. For lines longer than 15 ft with a 3/8” OD
liquid line, add 0.52 oz. per ft.
• Small variations in the temperatures and pressures are
normal due to differences in the installation.
• Large variations in the temperatures and pressures
could indicate incorrect charge or another problem with a
component in the system.
The preferred method of charging is by weighing in the
additional refrigerant required. If a charging scale is not
available, the next preferred charging method would be to
use the sub-cooling method in cooling mode.
5
MODEL:
Factory Charge
(for 15 ft. line set)
Additional Charge
for 50 ft. line set
Additional Charge
for 100 ft. line set
2 TON
(-024K)
10.0 lbs
(160 oz)
+ 1.1 lbs
(18 oz)
+ 2.8 lbs
(44 oz)
3 TON
(-036K)
10.5 lbs
(168 oz)
+ 1.1 lbs
(18 oz)
+ 2.8 lbs
(44 oz)
4 TON
(-048K)
11.8 lbs
(188 oz)
+ 1.1 lbs
(18 oz)
+ 2.8 lbs
(44 oz)
Table 4. Refrigerant Charge Quantities
Alternate Procedure for Charging Heat Pump in
Cooling Mode (with outdoor temperatures above
60 °F) Based on Subcooling:
While charging based on weight is preferred, this method is
acceptable. Use this method when the outdoor temperature
is 60°F or higher to verify the correct charge in cooling mode.
The indoor temperature should be between 70°F and 80°F.
1. Connect the gauge manifold to the liquid and vapor service
valves (Figure 8).
2. Start the system in CHARGE MODE, COOLING. Allow
the system to run 15 minutes to stabilize.
3. Record the liquid refrigerant pressure in psig at the service
valve.
4. Record the liquid refrigerant temperature in °F at the service
valve.
5. Using the temperature value recorded, determine the
corresponding liquid refrigerant pressure from the upper
curve (for cooling) in the charging chart (Figure 9).
6. If the pressure measured in step 3 is less than the required
liquid refrigerant pressure determined in step 5, then
refrigerant needs to be added.
7. If the pressure measured in step 3 is greater than the
required liquid refrigerant pressure determined in step 5,
then the system is over-charged.
8. Add or remove charge from the system depending on the
measurements recorded. Allo w the system to stabilize f or
15 minutes before taking the next readings.
2. Start the system in CHARGE MODE, HEA TING. Allow the
system to run 15 minutes to stabilize.
3. Record the liquid refrigerant pressure in psig at the service
valve.
4. Record the liquid refrigerant temperature in °F at the service
valve.
5. Using the temperature value recorded, determine the
corresponding liquid refrigerant pressure from the lower
curve (for heating) in the charging chart (Figure 9).
6. If the pressure measured in step 3 is less than the required
liquid refrigerant pressure determined in step 5, then
refrigerant needs to be added.
7. If the pressure measured in step 3 is greater than the
required liquid refrigerant pressure determined in step 5,
then the system is over-charged.
8. Add or remove charge from the system depending on the
measurements recorded. Allo w the system to stabilize f or
15 minutes before taking the next readings.
SYSTEM SETUP USING THE IQ CONTROLLER
IMPORTANT:
It essential that the wires meant to provide 24 v olts
to the outdoor unit are not mistakenly connected to
the communication terminals. Chec k again before
you apply power!
General
Pow er up the entire system with the iQ controller (thermostat)
installed in its base. The controller will be of use to the installer
for the following general purposes:
• Confi guring the system using INSTALLER SETTINGS
screens (required)
• Running system service tests (recommended)
• Using service information screens to examine and diagnose
system operation (very helpful, if needed)
• Setting options and features which are not typically used
or understood by the homeowner (recommended)
• Setting options and features with the homeowner’ s oversight
in an effort to train him/her (suggested)
Alternate Procedure for Charging Heat Pump in
Heating Mode (with outdoor temperatures below
60 °F) Based on Subcooling:
Use this method when the outdoor temperature is 60°F or
lower to estimate the correct charge in heating mode. The
indoor temperature should be between 65° F and 75° F.
The preferred method of charging is by weighing in the
additional refrigerant required. If a charging scale is not
available , the correct charge can be estimated by this method.
Refrigerant can be stored in the receiver and accumulators
and result in an over-charged system. If it is necessary to
use this method, follow up service should be scheduled when
the temperature is above 60°F, and then charge should be
verifi ed in cooling mode.
1. Connect the gauge manifold to the liquid service valve and
suction service por t located at the left side of the access
panel above the liquid service valve. See Figure 8.
6
The following descriptions of the controller apply specifi cally
to software Version 5.0. A summary of the controller menu
structure is provided in Figures 10 & 11. NOTE: This guideline
is not intended to be a comprehensive substitute for proper
iQ Drive system training (required).
Screen Navigation
Moving between option categories on menu screens or
moving between possible values for any one option is done
using the and keys. The line or value with a dark
background behind the characters is considered “selected”.
In order to change a selected option in most screens, or to
save a changed v alue , use the
key. Use the key to back
up into the previous screen in the menu/screen structure.
The Main Screen
The Main Screen is the normal display viewed on the
controller. It prominently shows room temperature and
operating mode (e.g., COOL or HEAT) in large numerals and
letters. Across the bottom line of the display are fi ve words
or abbreviations (normally RH TEMP MODE FAN MENU)
which represent selectable entry points into the menus. The
user can always return to the main screen from any other
screen by repeatedly pressing the
3/13/09
OUTDOOR
70
key.
12:18 PM
FAN AUTO
NOTE: It is important that any settings or service tests which
are appropriate be made at the time of system installation.
System Confi guration
Any time “CONFIGURATION NEEDED” appears at the top of
the Main Screen, the user must proceed through the SYSTEM
CONFIGURATION screens, even if no changes to values or
options are necessary. This will occur when installing a new
thermostat or moving a thermostat to a different type of iQ
system. The outdoor unit should be powered up when
confi rming or entering system confi guration.
76°
HUMIDITY
36
TEMP
MODERH
HEAT
HEAT 62
COOL 85
MENU
FAN
For iQ Zone systems with zone control enabled, the Main
Screen will appear slightly different, as shown below . The local
temperature reading is absent, and ZONE CNTL appears
under the operating mode.
1/19/09
OUTDOOR
46
10:00 AM
FAN AUTO
COOL
HUMIDITY
36
RH TEMP
ZONE CNTL
MODE MENU
FAN
With the fi rst line SYSTEM CONFIGURATION selected,
press the
key to proceed through the system confi guration
screens. The next screen, titled SYSTEM CONFIGURATION,
provides a read-only summary of the confi guration (as
detected, and otherwise showing either defaults or pre viously
confi gured information).
SYSTEM CONFIGURATION
OUTDOOR SYSTEM
2 TON
HEAT PUMP - IQ
WITH
1 STG GAS FURNACE
BLOWER TYPE B
COMMUNICATION
INDOOR UNIT - OK
OUTDOOR UNIT - OK
The words under OUTDOOR SYSTEM and WITH describe
the system components as automatically detected by the
controller. Both entries under COMMUNICATION should
show “OK”. If “CHECK” appears , it is an indication that either
communication wiring is incomplete or incorrect, or the
outdoor unit is not powered up. Proceed through subsequent
screens by using either the
or key (indicated by “NEXT”).
Installer Settings
Using procedures explained in iQ Drive training, go to the
INSTALLER SETTINGS menu screen.
INSTALLER SETTINGS
SYSTEM CONFIGURATION
ACCESSORIES
DEALER INFORMATION
SERVICE TESTS
RESTORE DEFAULTS
DEFROST CONFIG
HEAT OFF DELAY
ALTITUDE ADJUST
IQ DRIVE REV 5.0
Other than in the splash screen displayed when power is
fi rst applied to the controller, this is the only screen which
displays the controller software version number.
The following table indicates the information that may be
or needs to be manually confi gured or confi rmed by the
installer. (Information not listed is automatically determined.)
If necessary, check the ratings of the indoor unit before
proceeding.
Indoor Unit
Electric Heat
G6 gas furnace
G7 single stage gas
furnace
G7 two stage gas
furnace
Modulating MQ gas
furnace
Items Requiring Manual Confi guration
Heat type, number of stages, staging
differentials, kW
Heat type, number of stages, 1
differential, furnace input rate, furnace rise. If
2-stage: 2nd stage differential
st
stage start differential, furnace rise
1
st
stage start differential, 2nd stage differential,
1
furnace rise
Furnace rise
(or Confi rmation)
st
stage start
Table 5. System Confi guration Entry Summary
7
For MQ modulating iQ gas furnaces only, an additional
screen titled “OUTDOOR SYSTEM” will appear after the
SYSTEM CONFIGURATION summary screen. “HEAT
PUMP-IQ” should appear on the second line; no other option
may be selected in this screen. Press the
OUTDOOR SYSTEM
HEAT PUMP - IQ
CAPACITY (TONS)
-
STAGES
-
2ND STG DIFFERENTIAL
-
AIR FLOW, CFM PER TON
-
key to proceed.
Proceed through the subsequent confi guration screens
either accepting or changing entries, until the INSTALLER
SETTINGS menu is displayed again. This is an indication
that confi guration has been completed.
Accessories
Use the or keys to select ACCESSORIES. Press the
key to enter the accessories submenus and screens. This
set of screens allows the installer to trigger alerts (reminders)
when periodic maintenance is recommended for any of the
following accessories:
• Air fi lter
• Humidifi er
• U/V lamp
• Air cleaner
Dealer Information
Use the or keys to select DEALER INFORMA TION. Press
the key to enter the dealer information summary screen,
and submenus and screens. This set of screens allows the
installer to enter text information which will be display ed on a
SERVICE NEEDED displa y screen if a persistent fault occurs.
The following items may be entered:
• Brand name (Maytag, Frigidaire, NuTone, Broan, Tappan,
Westinghouse, or custom)
• Model Number
• Contractor Name
• Contractor Phone Number
DEALER INFORMATION
BRAND NAME
MAYTAG
MODEL NUMBER
FT4BI - 048K
CONTRACTOR NAME
JOE’S HVAC
CONTRACTOR PHONE
911 - 393 - 7777
The entered dealer information summary screen accessible
here will be available for future reference by a serviceperson
(under INSTALLER SETTINGS > DEALER INFORMATION).
Entry of this information is optional.
Defrost Confi guration
Use the or keys to select DEFROST CONFIG. Press the
key to enter the screen which allows changes to:
If desired, set the maintenance alert timing for any of these
based on either hours of operation or calendar time. When
triggered by the passing of the selected time or operating
hours, the maintenance reminder message string will be
displayed on the top of the Main Screen. In addition, at the
base of the Main Screen “CANCEL ALERT” will appear. When
this is selected and the
key is pressed, the maintenance
reminder message will be removed.
ACCESSORIES
AIR FILTER
HUMIDIFIER
UV LAMP
AIR CLEANER
Making changes or entries under ACCESSORIES is optional.
• DEFROST TERMINATION TEMPERATURE. This is the
outdoor coil temperature value which, when reached during
the defrost sequence, will signal the end of the defrost phase
during which the system heats up the outdoor coil to melt
accumulated frost. (Default value is 75°F.)
• COIL DEFROST DELTA T. During heat pump heating
operation a defrost sequence will be triggered when
the outdoor coil temperature falls this amount below the
temperature it would operate at with a clear , unfrosted coil.
(Default value is 6°F.)
DEFROST CONFIG
DEFR TERMINATION TEMP
75 DEG F
COIL DEFROST DELTA T
6 DEG F
8
Under normal circumstances it is not necessary or advisable
to change these from their default values.
Heat Off Delay
If the system includes a G6 gas furnace, you may use the
or
keys to select HEAT OFF DELAY. Press the key to
enter the screen which allows changes to the length of time
that the blower (indoor fan) will remain on after the fur nace
fl ame is extinguished. Under normal circumstances it is not
necessary or advisable to change this from its default value
of 120 seconds.
Altitude Adjust
If the system includes an iQ modulating gas furnace, you
may use the or keys to select ALTITUDE ADJUST.
Press the key to enter the screen which allows changes to
the installation altitude (feet above sea level). This entry is
advisable for the modulating gas furnace. Refer also to the
furnace Installation Instructions.
Service T ests
You may use the or keys to select SERVICE TESTS.
Press the key to enter the screen which allows access to
a list of service tests. These tests provide an easy way for
the service person to operate the system in various modes
for operational confi rmation and diagnostic troubleshooting
during installation startup. The following fi ve options are
available in the submenu.
SERVICE TESTS
CHARGE MODE
FURNACE TESTS
AIR COND RUN TESTS
HEAT PUMP RUN TESTS
DISCRETE OUTPUTS
CHARGE MODE – Runs the system at the proper speed for
checking and adjusting refrigerant charge. Select the mode as
HEATING or COOLING, then change RUN from OFF to ON.
The screen backlight will blink red. The user may navigate
to other screens (e.g., SERVICE INFORMATION) during the
process until ON in the CHARGE MODE screen is changed
back to OFF and saved. The red b linking backlight serves as
a reminder that the unit is operating in an abnormal (service)
mode. Select OFF (from the list that includes ON and OFF)
and SAVE (
) when fi nished.
FURNACE TESTS – Runs the system at the selected fi re
level to allow confi rmation of proper operation. The screen
backlight will blink red. A short list of instructions (reminders)
is provided. Select STAR T to run a single stage furnace . Select
LO FIRE or HI FIRE to run a two stage furnace. The user may
navigate to other screens (e.g., SERVICE INFORMATION)
during the process. The red blinking backlight serves as a
reminder that the unit is operating in an abnormal (service)
mode. Select DONE (from the list that includes LO FIRE, HI
FIRE, ST ART , STOP) and SA VE (
) when the test is complete,
before leaving the screen for the last time.
AIR COND RUN TESTS and HEAT PUMP RUN TESTS – In
these screens the unit can be made to run at a fi xed speed
regardless of room temperature. RUN can be changed
between OFF, MAX (speed), INTERMED(iate speed), and
MIN (speed). MAX speed is the same as that used in charge
mode. The screen backlight will blink red when anything but
OFF is selected and saved. The user may navigate to other
screens (e.g., SERVICE INFORMATION) during the process
until RUN in this screen is changed back to OFF and saved.
The red blinking backlight serves as a reminder that the unit
is operating in an abnormal (service) mode. This screen is
primarily intended for test agency usage. Heat pump run
tests apply only to heat pump units. Select OFF and SAVE
(
) when fi nished.
NOTE: While running the system from Service Tests is
convenient for some startup operations, much of the nor mal
fault handling and diagnostic message functionality is disabled.
Within each test screen there may be more than one entry which
can be changed. Select the desired entry to be modifi ed using
the
and keys. The line or v alue with a dark background
behind the characters is considered “selected”. Press the
key to allow changing the selected item (its dark backg round
will then blink). Set the desired value for the item using the
and keys, then press the key to save it.
The following is a brief description of the SERVICE TEST
categories. NOTE: With iQ Zone systems there may be a delay
before the test begins, as all zone dampers open.
For iQ heat pumps the capability to force a defrost is a vailable.
As indicated on the HEAT PUMP RUN TESTS screen, this
feature may only be used when MAX speed has been selected.
To perform a sample defrost while a MAX speed heating run
test is running, press the
key to select DEFROST NO W, then
press the ( ) key to begin the defrost. The defrost sequence
will proceed, including use of auxiliary heat while heating the
coil and the 8 minute post-defrost coil temperature calibration.
Only use this feature if the outdoor conditions are typical
heating conditions. Do not force a defrost before the system
has operated in heating for several minutes fi rst.
DISCRETE OUTPUTS – When the unit is off, this screen
allows the user to operate certain relay-driven outputs in the
system for diagnostic purposes: humidifi er (on the indoor
interface board or blower control board), reversing valve (on
the outdoor interface board), indoor coil EXV (on the indoor
interface board or blow er control board), outdoor coil EXV (on
the outdoor interface board), and crankcase heater (on the
outdoor interface board). More than one of these can be set
to ON at the same time. Lea ving the DISCRETE OUTPUTS
screen will shut all of the listed outputs off.
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