AAON F-060 User Manual
F1 Series
Indoor Air Handing Units
Installation, Operation
& Maintenance
QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
personal injury or loss of life.
Installation and service must be
performed by a trained, qualified
installer. A copy of this IOM should
be kept with the unit.
These instructions are addressed
primarily to the installer; however,
useful maintenance information is
included. This manual should be kept
with the unit for future reference.
NOTICE
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
Table of Contents
Safety .............................................................................................................................................. 6
F1 Base Model and Features Description ..................................................................................... 10
General Description ...................................................................................................................... 11
Codes and Ordinances ............................................................................................................... 11
Receiving Units ......................................................................................................................... 12
Before Beginning Installation ................................................................................................... 13
Storage ....................................................................................................................................... 13
Installation..................................................................................................................................... 14
General ...................................................................................................................................... 14
Service and Installation Clearance ............................................................................................ 14
Floor Mounted Units ................................................................................................................. 14
Suspended .................................................................................................................................. 14
Sealing ....................................................................................................................................... 15
Cooling Equipment ................................................................................................................... 15
Heating Equipment .................................................................................................................... 16
Field Wiring - MCA and MOP ................................................................................................. 16
Heat Pump ................................................................................................................................. 17
ECM Driven Fan ....................................................................................................................... 17
Reheat Coil Refrigerant Piping ................................................................................................. 18
Condensate Piping ..................................................................................................................... 20
Electrical .................................................................................................................................... 20
Thermostat ................................................................................................................................. 20
Filters ......................................................................................................................................... 20
Charging Refrigerant ................................................................................................................. 20
Evaporator Coil ......................................................................................................................... 22
Startup ........................................................................................................................................... 24
General ...................................................................................................................................... 24
Check-Out ................................................................................................................................. 24
Procedures ................................................................................................................................. 24
Electric Heat Section Procedures .............................................................................................. 25
Refrigerant Cooling Section Procedures ................................................................................... 25
Optional Equipment Procedures ................................................................................................ 25
Commissioning .......................................................................................................................... 26
Air Balancing ............................................................................................................................ 26
Water Balancing ........................................................................................................................ 26
Controls ..................................................................................................................................... 26
Operation and Maintenance .......................................................................................................... 26
General ...................................................................................................................................... 26
Maintenance Schedule ............................................................................................................... 26
Lubrication ................................................................................................................................ 27
Blower Assembly ...................................................................................................................... 27
Coils .......................................................................................................................................... 27
Heating ...................................................................................................................................... 27
Filters ......................................................................................................................................... 27
3
Refrigerant Piping ..................................................................................................................... 28
Determining Refrigerant Line Size ........................................................................................... 29
Equivalent Line Length ............................................................................................................. 29
Predetermined Line Sizes .......................................................................................................... 32
Refrigerant Piping Diagrams ........................................................................................................ 35
Thermostat Installation and Wiring .............................................................................................. 43
F1 Series Startup Form ................................................................................................................. 53
Maintenance Log .......................................................................................................................... 56
Literature Change History............................................................................................................. 57
R58420 · Rev. B · 120509
(ACP 29902)
Index of Table and Figures
Tables:
Table 1 - Electric Heat Minimum Circuit Ampacity .................................................................... 16
Table 2 - Electric Heat Maximum Overcurrent Protection ........................................................... 17
Table 3 - Factory Preset Air Flow................................................................................................. 17
Table 4 - Cooling Fan Speed Tap Settings ................................................................................... 17
Table 5 - Climate Settings ............................................................................................................. 18
Table 6 - Heating Fan Speed Tap Settings .................................................................................... 18
Table 7 - Acceptable Air-Cooled Refrigeration Circuit Values ................................................... 22
Table 8 - Predetermined Line Sizes for F1 and CB Series Matched Systems with Two Step R-
410A Scroll Compressors ............................................................................................................. 33
Figures:
Figure 1 - Typical Vertical and Horizontal Unit Installation Methods ......................................... 15
Figure 2 - Example Configuration of ECM Fan Taps .................................................................. 17
Figure 3 - Riser Height Versus Total Equivalent Line Length for R-410A Split System
Applications with Two Step Scroll Compressor CB-024 through CB-060 units. ........................ 34
Figure 4 - Modulating Hot Gas Reheat Piping Diagram with Air Handling Unit above
Condensing Unit. .......................................................................................................................... 35
Figure 5 - Modulating Hot Gas Reheat Piping Diagram with Air Handling Unit below
Condensing Unit ........................................................................................................................... 36
Figure 6 - Modulating Hot Gas Reheat Piping Diagram with Air Handling Unit above
Condensing Unit with Optional Accumulator .............................................................................. 37
Figure 7 - Modulating Hot Gas Reheat Piping Diagram with Air Handling Unit below
Condensing Unit with Optional Accumulator .............................................................................. 38
Figure 8 - Heat Pump Piping Diagram with Indoor Unit above Outdoor Unit............................. 39
Figure 9 - Heat Pump Piping Diagram with Outdoor Unit above Indoor Unit ............................. 40
Figure 10 - Heat Pump Piping Diagram with Modulating Hot Gas Reheat and Indoor Unit above
Outdoor Unit ................................................................................................................................. 41
Figure 11 - Heat Pump Piping with Modulating Hot Gas Reheat and Outdoor Unit above Indoor
Unit ............................................................................................................................................... 42
Figure 12 - 2 Stage Cooling with Electric Heat ............................................................................ 43
Figure 13 - 2 Stage Cooling with Heat Pump and Electric Heat .................................................. 44
Figure 14 - 2 Stage Cooling and Electric Heat with Hot Gas Reheat and Humidistat ................. 45
Figure 15 - Main Control Board for Units Equipped with Modulating Hot Gas Reheat .............. 46
Figure 16 - Field Wiring Connections for an F1 Series Air Handling Unit. ................................ 47
Figure 17 - 5kW Electric Heat ..................................................................................................... 48
Figure 18 - 10 kW Electric Heat .................................................................................................. 49
Figure 19 - 15 kW Electric Heat .................................................................................................. 50
Figure 20 - 20 kW Electric Heat ................................................................................................. 51
Figure 21 - 25 kW Electric Heat ................................................................................................. 52
5
Safety
NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Caution statements are given to prevent actions that may result in
equipment damage, property damage, or personal injury.
WARNING - Warning statements are given to prevent actions that could result in
equipment damage, property damage, personal injury or death.
DANGER - Danger statements are given to prevent actions that will result in equipment
damage, property damage, severe personal injury or death.
Attention should be paid to the following statements:
ELECTRIC SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in dangerous
operation, serious injury, death or
property damage.
Improper servicing could result in
dangerous operation, serious injury,
death or property damage.
Before servicing, disconnect all
electrical power to the unit. More
than one disconnect may be
provided.
When servicing controls, label all
wires prior to disconnecting.
Reconnect wires correctly.
Verify proper operation after
servicing. Secure all doors with
key-lock or nut and bolt.
Electric shock hazard. Before
servicing, disconnect all electrical
power to the unit, including remote
disconnects, to avoid shock hazard
or injury from rotating parts. Follow
proper Lockout-Tagout procedures.
FIRE, EXPLOSION OR CARBON
MONOXIDE POISONING HAZARD
Failure to replace proper controls
could result in fire, explosion or
carbon monoxide poisoning. Failure
to follow safety warnings exactly
could result in serious injury, death or
property damage. Do not store or use
gasoline or other flammable vapors
and liquids in the vicinity of this
appliance.
6
During installation, testing, servicing
and troubleshooting of the equipment
it may be necessary to work with live
electrical components. Only a
qualified licensed electrician or
individual properly trained in handling
live electrical components shall
perform these tasks.
Standard NFPA-70E, an OSHA
regulation requiring an Arc Flash
Boundary to be field established and
marked for identification of where
appropriate Personal Protective
Equipment (PPE) be worn, should be
followed.
GROUNDING REQUIRED
All field installed wiring must be
completed by qualified personnel.
Field installed wiring must comply
with NEC/CEC, local and state
electrical code requirements. Failure
to follow code requirements could
result in serious injury or death.
Provide proper unit ground in
accordance with these code
requirements.
To prevent injury or death lifting
equipment capacity shall exceed unit
weight by an adequate safety factor.
Always test-lift unit not more than 24
inches high to verify proper center of
gravity lift point to avoid unit damage,
UNIT HANDLING
injury or death.
ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
open door containing fans until the
power to the unit has been
disconnected and fan wheel has
stopped rotating.
Failure to properly drain and vent
coils when not in use during freezing
temperature may result in coil and
equipment damage.
Rotation must be checked on all
MOTORS AND COMPRESSORS of
3 phase units at startup by a qualified
service technician. Scroll
compressors are directional and can
be damaged if rotated in the wrong
direction. Compressor rotation must
be checked using suction and
discharge gauges. Fan motor rotation
should be checked for proper
operation. Alterations should only be
made at the unit power connection
7
CAUTIO
CAUTIO
Do not use oxygen, acetylene or air
in place of refrigerant and dry
nitrogen for leak testing. A violent
explosion may result causing injury or
death.
WARNING
Always use a pressure regulator,
valves and gauges to control
incoming pressures when pressure
testing a system. Excessive pressure
may cause line ruptures, equipment
damage or an explosion which may
result in injury or death.
Do not work in a closed area where
refrigerant or nitrogen gases may be
leaking. A sufficient quantity of
vapors may be present and cause
injury or death.
Do not clean DX refrigerant coils with
hot water or steam. The use of hot
water or steam on refrigerant coils
will cause high pressure inside the
coil tubing and damage to the coil.
N
To prevent damage to the unit, do not
use acidic chemical coil cleaners. Do
not use alkaline chemical coil
cleaners with a pH value greater than
8.5, after mixing, without first using
an aluminum corrosion inhibitor in the
cleaning solution.
N
Some chemical coil cleaning
compounds are caustic or toxic. Use
these substances only in accordance
with the manufacturer’s usage
instructions. Failure to follow
instructions may result in equipment
damage, injury or death.
Risk of injury from hot parts –
Disconnect all power, close all
isolation valves and allow equipment
to cool before servicing equipment
with heating coils. Hot water will
circulated even after the power is off.
8
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used with R-410A and other
refrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
1. The unit is for indoor use only. See
General Information section for more
unit information.
2. Every unit has a unique equipment
nameplate with electrical, operational,
and unit clearance specifications.
Always refer to the unit nameplate for
specific ratings unique to the model you
have purchased.
3. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
4. Keep this manual and all literature
safeguarded near or on the unit.
9
F1
Series and
Generation
F1 Base Model and Features Description
A
-
Rev.
BASE MODEL
SERIES AND GENERATION
F1
REVISION
A = Design Sequence
UNIT SIZE
024 = 24 MBtu/h (2 ton)
036 = 36 MBtu/h (3 ton)
048 = 48 MBtu/h (4 ton)
060 = 60 MBtu/h (5 ton)
VOLTAGE
1 = 208-230V/1Φ/60Hz
C = 115V/1Φ/60Hz
APPLICATION
V = Vertical Position (Up-flow)
M = Multi-Position (Up-flow or Horizontal)
HEATING
0 = No Heat
A = 5 kW
B = 10 kW
C = 15 kW
D = 20 kW
E = 25 kW
G = Hot Water Heating
H = Hot Water Heating - No Cooling
FEATURE 1: MOTORS
A = ECM - 1/2 hp
B = ECM - 3/4 hp
C = ECM - 1.0 hp
FEATURE 2: FILTERS
0 = Standard - 1” Fiberglass
060
-
Unit
Size
1
-
Voltage App. Heat Mtrs Filters Cntls Blank Refri. Blank Cabinet Special
M
-
C
-
C 0 0 0 C 000 0 0
:
FEATURE 3: CONTROLS
0 = Standard - Terminal Block
FEATURE 4: BLANK
0 = Standard
FEATURE 5: REFRIGERATION
0 = Standard - Split System Air Conditioner
C = Split System Heat Pump
D = Split System Air Conditioner + Modulating Hot
Gas Reheat
F = Split System Heat Pump + Modulating Hot Gas
Reheat
FEATURE 6: BLANK
0 = Standard
FEATURE 7: BLANK
0 = Standard
FEATURE 8: BLANK
0 = Standard
FEATURE 9: CABINET
0 = Standard - Embossed Galvanized Steel
A = Painted Cabinet Exterior
FEATURE 10: SPECIAL
0 = Standard
X = Special Price Authorization
10
General Description
F1 Series air handling units are designed for
safe operation when installed, operated and
maintained within design specifications and
the instructions set forth in this manual. It is
necessary to follow these instructions to
avoid personal injury or damage to
equipment or property during equipment
installation, operation, start-up and
maintenance.
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
personal injury or loss of life.
Installation and service must be
performed by a qualified installer. A
copy of this IOM should be kept with
the unit.
This equipment is protected by a
standard limited warranty under the
condition that initial startup and
maintenance is performed according
to the instructions set forth in this
manual. This manual should be read
in its entirety prior to installation and
before performing any service or
maintenance work.
These units must not be used as a
“construction heater” at anytime
during any phase of construction.
Very low return air temperatures,
harmful vapors, and misplacement of
the filters will damage the unit and its
efficiency.
Certification of Cooling Models
a. Certified for use with a residential
remote R-410A condensing unit with a
two-step compressor.
b. Certified for indoor installation only
Certification of Cooling and Reheat
Models
a. Certified for use with a residential
remote R-410A condensing unit with a
two-step compressor and hot gas
dehumidification capabilities.
b. Certified for indoor installation only
Certification of Electric Heat Models
a. Certified as an electric heating air
handling unit with a cooling coil.
b. Certified for indoor installation only.
Codes and Ordinances
F1 Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 1995/CSA C22.2 No. 236.
System should be sized in accordance with
the American Society of Heating,
Refrigeration and Air Conditioning
Engineers Handbook.
Installation of F1 Series units must conform
to the ICC standards of the International
Mechanical Code, the International Building
Code, Installation of Air Conditioning and
Ventilating Systems Standard, NFPA 90A,
and local building, plumbing and waste
water codes. All appliances must be
electrically grounded in accordance with
local codes, or in the absence of local codes,
the current National Electric Code,
ANSI/NFPA 70 or the current Canadian
Electrical Code CSA C22.1.
Important: The United States
Environmental Protection Agency (EPA)
has issued various regulations regarding the
introduction and disposal of refrigerants in
11
this unit. Failure to follow these regulations
CAUTIO
quip
may harm the environment and can lead to
the imposition of substantial fines. Because
regulations may vary due to passage of new
laws, AAON suggests a certified technician
perform any work done on this unit. Should
you have any questions please contact the
local office of the EPA.
WARNING
Do not, under any circumstances,
connect ductwork to any other heat
producing device such as fireplace
insert, stove, etc. Unauthorized use
of such devices may result in
property damage, fire, carbon
monoxide poisoning, explosion,
personal injury or death.
It is the responsibility of the installing
contractor to comply with codes,
ordinances, local and municipal
building laws, and manufacturer’s
instruction. Personal injury and/or
equipment damage may result if
proper procedures are not followed.
The Clean Air Act of 1990 bans the
intentional venting of refrigerant as of
July 1, 1992. Approved methods of
recovery, recycling, or reclaiming
must be followed.
N
Always wear hand and eye protection
when handling, installing, servicing,
or maintaining equipment. Sharp
edges, moving parts and fly debris
may cause personal injury and care
must be taken when working with
ment.
e
Any conflicting codes or regulations take
precedence over the information in this
manual. It is important that all installation
and service work be performed by qualified
professionals.
Receiving Units
All shipments are FOB from the factory. It
is the responsibility of the receiving party to
inspect the equipment upon arrival. Units
should be inspected for damage that may
have occurred in transit. Please do not refuse
shipments!
Check the unit model number,
specifications, electrical characteristics and
accessories to determine if they are correct.
In the event an incorrect unit is shipped, it
must be returned to the supplier and must
NOT be installed. The manufacturer
assumes no responsibility for installation of
incorrectly shipped units.
Do the following upon receipt:
1. Assure that freight carrier is in
compliance with Bill of Lading
instructions.
2. Inspect delivery before signing Bill of
Lading.
If damage is found or items are missing:
1. Note on Bill of Lading immediately.
2. Call carrier immediately to file a freight
claim and to schedule an inspection.
3. Photograph damage if possible.
12
4. Do not move or discard damaged freight
packaging materials
5. After losses have been acknowledged by
the freight carrier, contact factory for a
repair or replacement part quote.
6. With permission of freight carrier, order
parts and/or make repairs.
7. Stay in contact with freight carrier to
ensure payment of your claim.
Nameplate should be checked to ensure the
correct model sizes and voltages have been
received to match the job requirements.
If repairs must be made to damaged goods,
then the factory should be notified before
any repair action is taken in order to protect
the warranty. Certain equipment alteration,
repair, and manipulation of equipment
without the manufacturer’s consent may
void the product warranty. Contact the
AAON Warranty Department for assistance
with handling damaged goods, repairs, and
freight claims: (903) 236-4403.
Note: Upon receipt check shipment for
items that ship loose such as filters,
thermostats and remote sensors. Consult
order and shipment documentation to
identify potential loose-shipped items.
Loose-shipped items may have been placed
inside unit cabinet for security.
Dependent upon the optional accessories
that were ordered, this equipment may
contain fragile components and delicate
electronics. Although the unit is constructed
of sturdy materials, avoid impacts and
handling methods that may damage internal
apparatus and structure of the unit. Take
care not to apply destructive force to coils,
coil and drain stub-outs, or other parts
protruding beyond the extents of the unit
casing. Always handle the unit by its
exterior casing and never by any of the
protruding parts.
Before Beginning Installation
Carefully read all instructions for the
installation prior to installing unit. Make
sure each step or procedure is understood
and any special considerations are taken into
account before starting installation.
Assemble all tools, hardware and supplies
needed to complete the installation.
Some items may need to be purchased
locally. After deciding where to install unit,
closely look the location over - both the
inside and outside of home. Note any
potential obstacles or problems that might be
encountered as noted in this manual. Choose
a more suitable location if necessary.
Storage
This equipment is not suitable for outdoor
use or storage. Never place this equipment
where it may be subjected to outdoor
conditions such as rain, snow, humidity,
extreme temperatures or corrosive
chemicals.
If installation will not occur immediately
following delivery, store equipment in a dry
protected area away from construction
traffic, and in the proper orientation as
marked on the packaging with all internal
packaging in place. Secure all loose-shipped
items.
Keep equipment free from debris, and
construction waste during installation.
Foreign materials may adversely affect unit
operation resulting in premature failures that
will not be covered by the manufacturer’s
warranty. Attach all service panels, and
cover all exposed equipment when work is
not being performed. Leave unit protected
from other construction until start-up is to
occur.
13
CAUTIO
This unit must be stored indoors if
installation is not to occur
immediately following delivery.
Unprotected units could develop
corrosion if left exposed to the
environment. Damage resulting from
improper storage will not be covered
by the limited warranty.
N
Installation
AAON equipment has been designed for
quick and easy installation.
General
F1 Series air handling units are designed as
heating, cooling or combination units for
indoor installation only. They are designed
for R-410A refrigerant only. Flexible
connectors are required on all duct
connections to minimize air leaks.
Service and Installation Clearance
Before setting the air handling unit into
place, caution must be taken to provide
clearance for unit panels that must be
accessible for periodic service. These areas
contain the controls, safety devices,
refrigerant piping, shut-off valves and filter
access.
F1 series air handling units require a
minimum of 36 inches of service clearance
on the access panel side of the unit in order
to ensure room for removal, replacement, or
service of coils and other components if
necessary.
Note: An auxiliary (emergency) drain pan is
recommended for all applications where
there is a risk of water damage to
surrounding structure or furnishings. Refer
to local codes.
Floor Mounted Units
Make sure that the unit is level, and
mounted on a field-supplied platform with a
minimum height of 12” to allow for proper
fall on the condensate line. Other installation
provisions may be necessary according to
job specifications. F1 series air handling
units are designed for up flow and horizontal
applications only.
Suspended
The F1 series multi-position air handling
unit can be easily suspended for suspended
horizontal installations. The air handling
unit should be lifted into position,
supporting the entire unit from the bottom
throughout the lift. Suspend the air handling
unit as shown in the following Figure 1. An
auxiliary drain pan that covers the entire unit
would be required for above ceiling
installations.
The air handling unit must be installed level
and care should be taken to prevent damage
to the cabinet. Other installation provisions
may be necessary according to job
specifications and local code.
14
Figure 1 - Typical Vertical and Horizontal Unit Installation Methods
Sealing
It is very important to keep outside air from
infiltrating the unit cabinet. Seal all piping
penetrations with Armaflex, Permagum, or
other suitable sealant. Also seal around drain
connections, electrical connections, and
other inlets where air may enter the cabinet.
This is especially important when the unit is
installed in an unconditioned area.
Cooling Equipment
Acceptable system design and installation
will include consideration as follows:
Piping from the condensing unit to the
indoor air handling unit is the responsibility
of the installing contractor.
Only clean “ACR” tubing should be used.
Piping should conform to generally accepted
practices and codes.
Care must be taken not to cross the circuits
on reheat systems.
Once piped, the interconnecting piping and
air handling unit MUST BE evacuated to
500 microns or less; leak checked and
condenser shutoff valves opened to allow
refrigerant flow to air handling unit. Charge
unit with R-410A refrigerant to the
recommended superheat/sub-cooling in the
Charging Refrigerant section of this manual.
Make sure air handling unit thermal
expansion valve bulb is mounted with
good thermal contact on the suction line
on a horizontal section, close to the
evaporator but outside the cabinet in the
4 or 8 o’clock position and well insulated.
Lines should be fastened and supported
according to local codes.
15
Heating Equipment
Hot Water Heating:
Water supply lines must be insulated,
properly fastened, drained and supported
according to local code requirements.
Electric Heating:
Installing Electric Heat Strip into the
Unit:
1. Remove front control panel(s) of the unit
2. Remove screws and panel covering heat
strip compartment
3. Open the heat strip kit and remove
assembly from package
4. Install strip heat into opening and secure
with 4 (four) screws
5. Install breaker assembly on bracket and
secure with breaker with 4 (four) screws
6. Make sure that breaker is in the OFF
position
7. Connect all control wires per wiring
diagram included in the unit
8. Pull and install power wires per wiring
diagram and MCA, MOP information
herein and secure all wires firmly
9. Replace the front control panel(s) of the
unit
FIELD INSTALLED WIRES SHOULD BE
SINGLE STRAND WIRES. USE OF
ROMEX WIRES IS NOT ACCEPTABLE.
Heating is accomplished by passing
electrical current through a specified amount
of resistance heaters, which will produce the
required heat. The indoor blower motor will
energize at the same time as the heaters.
Wiring to the air handling unit must be done
in accordance with local electrical codes
and/or standards. Check specified electrical
rating and install with proper wire sizes.
Also refer to wiring diagrams included with
the unit for wire sizes and circuit breaker
recommendations.
Field Wiring - MCA and MOP
Minimum Circuit Ampacity (MCA) and
Maximum Overcurrent Protection (MOP)
are necessary to correctly connect field
wired equipment.
The calculations for the MCA and MOP are
based on requirements of NFPA 70, the
National Electrical Code (NEC) and CSA
C22.1, the Canadian Electrical Code (CEC).
The MCA is the minimum wire size needed
to prevent the wiring from overheating
during operating conditions for the life of
the product. The MOP is the maximum
allowable circuit breaker size that will
properly disconnect power to the equipment
under anticipated fault conditions.
In the following tables, locate the kW of the
heater to be field installed, and then choose
the corresponding MCA and MOP values to
correctly size the wire gauge(s) and circuit
breaker(s), respectively.
Table 1 - Electric Heat Minimum Circuit
Ampacity
230V 208V
kW kW MCA MCA MCA
5 3.75 26.0
10 7.50 52.1
15 11.25 52.1 26.0
20 15.00 52.1 52.1
25 18.75 52.1 52.1 26.0
Overcurrent protection less than that
recommended on the unit's "Specification
Sheet" could result in unnecessary fuse
failure and service call. The manufacturer
bears no responsibility for damage caused to
the equipment as a result of not using the
recommended size for the protective devices
as listed on the unit's rating plate.
Line 1 Line 2 Line
3
16
Table 2 - Electric Heat Maximum
A
A
A
Overcurrent Protection
230V 208V Line 1 Line 2 Line
3
kW kW MOP MOP MOP
5 3.75 30
10 7.50 60
15 11.25 60 30
20 15.00 60 60
25 18.75 60 60 30
Heat Pump
For heat pump equipped split system
configurations, the heat pump is the primary
heat source during a call for heat. During
operation at low ambient temperatures
where the heat pump alone cannot satisfy
the space temperature set point, electric
resistance heat elements are activated.
Below about 17°F, only the electric heat is
operable; the heat pump is not active.
ECM Driven Fan
The Electrically Commutated Motor (ECM)
has selectable fan speeds as determined by
the configuration of four pins as shown in
FIGURE 2.
----
B
C
D
HEAT COOL ADJUST DELAY
- -
- -
- -
B
C
D
- -
- -
- -
----
1
- -
+
- -
-
----
1
- -
----
B
- -
C
- -
D
- -
Figure 2 - Example Configuration of ECM
Fan Taps
Adjust the taps as desired for cooling,
dehumidification, and heating according to
the following instructions.
Cooling:
Units are preprogrammed from the factory
for a rated airflow rate of 400 cfm per ton as
shown in Table 3.
Table 3 - Factory Preset Air Flow
Model Preset cfm
F1-060 2000
F1-048 1600
F1-036 1200
F1-024 800
* Maximum total static is 2.25” w.g.
The high speed for cooling may be selected
by setting the COOL and ADJUST fan
speed taps (shown in Figure 2). The setting
combinations are shown in Table 4.
Note: On the ADJUST tap, both of the ‘1’
selections have the same effect on motor
speed.
Table 4 - Cooling Fan Speed Tap Settings
F1-060/ F1-036/
F1-048 F1-024
(cfm) (cfm)
COOL
Tap
ADJUST
Tap
2000 1200 A 1
2000 1200 D 1
1840 1150 B +
1700 1020 A 1700 1020 D 1600 1000 B 1
1380 920 C +
1360 850 B 1200 800 C 1
1020 680 C -
A signal from the thermostat, showing a
need for dehumidification, will cause the
unit to slow the fan speed in order to allow
the air moving across the coil to get colder
thereby better dehumidifying the air. Fist
stage dehumidification has a low fan speed
of 67% of the selected max speed. Second
stage dehumidification has a fan speed of
45% of the selected max speed. NOTE: The
Modulating Hot Gas Reheat option must be
selected to have a second stage of
dehumidification.
17
In this comfort cooling application of the
ECM fan motor, heat and cool taps, A & D
have the same effect on motor speed.
Humidity Control:
Adjust the DELAY tap for humidity control
that is suitable for the climate according to
Table 5.
Table 5 - Climate Settings
CLIMATE DELAY Tap
Humid A
Sub-humid/Dry B
Semi-Arid C
Arid/Hyper-Arid D
Heating:
The fan speed for the heating cycle is
selected by adjusting the HEAT tap (see
FIGURE 2) according to TABLE 6.
Table 6 - Heating Fan Speed Tap Settings
F1-060/ F1-036/
HEAT Tap F1-048 F1-024
(cfm) (cfm)
1800 1000 A
1400 800 B
1200 600 C
1800 1000 D
ECM Fan Notes
1. Fan only = 50% of max speed
2. Dehumidifying speeds
i) First stage dehumidification =
67% of max speed
ii) Second stage dehumidification =
45% of max speed
3. Green Light will blink once per every
100 CFM
4. Dehumidification terminal is BK. There
must be a constant voltage to this
terminal, and when the voltage is
dropped then dehumidification mode
will begin.
Fan wiring notes:
1. If only one stage of cooling is used then
jumper Y1 and Y2.
2. If unit is not heat pump capable then
jumper O and Y1.
3. If no humidistat is used then jumper BK
and R.
4. When only one stage of heat is used
jumper W1 and W2.
Reheat Coil Refrigerant Piping
The reheat coil is shipped already
installed on the leaving air section of the
air handling unit. A liquid receiver is
shipped loose with the unit for field
installation. (See Refrigerant Piping Section
to determine acceptable refrigerant line
size.)
1. Run a hot gas line from the outdoor unit
and connect it to the inlet of the stub-out
on the reheat coil.
a. For vertical (up-flow) units. The
inlet connection is the left stub-out
when facing the front of the unit.
Connect the hot gas line from the
outdoor unit to the left stub-out.
Connect the check valve (shipped
loose) to the right stub-out in a
direction so that the refrigerant flow
is leaving the right side of the coil.
Be sure to not block access for
18
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