ICP Air Handler (indoor Blower&evap) Manual L0909283

User Manual: ICP ICP Air Handler (indoor blower&evap) Manual ICP Air Handler (indoor blower&evap) Owner's Manual, ICP Air Handler (indoor blower&evap) installation guides

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Theseinstructionsmustbereadandunderstoodcompletelybeforeattemptinginstallation.

SAFETY

CONSIDERATIONS

Improper installation,
adjustment,
alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock, or other conditions which may cause death,
personal injury, or property damage. Consult a qualified
installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency
must use factory-authorized
kits or accessories when
modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Use quenching cloth for
brazing operations. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or
cautions included in literature and attached to the unit.
Consult local building codes, the current editions of the
National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian
Electrical Code CSA C22.1 Recognize safety information.
This is the safety-alert symbol /k, When you see this
symbol on the unit and in instructions or manuals, be alert
to the potential for personal injury. Understand these
signal words; DANGER, WARNING, and CAUTION.
These words are used with the safety-alert
symbol.
DANGER identifies the most serious hazards which will
result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or
death. CAUTION is used to identify unsafe practices
which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or
operation.

TABLE OF CONTENTS
General Information/Installation
...................
Installation .....................................
Vertical/Horizontal Installation .....................
Ductwork Connection ............................
Filter Installation ................................
Electrical Connection ............................
Blower Performance .............................
Sequence of Operation .........................
Wiring Diagram ................................
Replacement Parts .............................

Specifications

2
2
3
4
4
4
8
10
11
12

ELECTRICAL

SHOCK HAZARD

Failure to turn off electric power could result in personal injury or death.
Before installing or servicing system, turn off main
power to the system. There may be more than one disconnect switch, including accessory heater(s).

are subject to change without notice.

442 01 2206 01 April 2009
X40159 Rev. B

Nominal

Installation
143/8(365) 177/8(454) 211/2(546) 231/8(587) -

Dimensions

and Clearances

2 & 2Y2Ton
3 & 31/2Ton
4 Ton
5 Ton

- in(mm)

CLEARANCES
NO HEATERS
All Sides ..................................
From Supply Duct ..........................
Recommended Service From Front ..........
(Service for blower, filter if installed)

3/4"

LowVoltage
Entrance

WITH HEATERS
All Sides ..................................
From First Three Feet of Supply Duct
to Combustibles
...........................
From Duct after Three Feet .................
Recommended Service From Front ..........
(Service for blower, heaters if installed)

LineVoltage
Entrance

(6)9)

0"
0"
20"(508 mm)

0"
1" (25mm)
0"
20" (508mm)

I
FIRE HAZARD

Failure to follow this warning could result in
personal injury, death, and/or property damage.
When heaters are installed maintain clearances
from combustible materials as specified on unit
rating plate. Do not use plastic lined or combustible
flexible ducting within 36" (914 mm) of the supply
end of the modular unit.

153A(400) 19¼ (489) 227/8(581) 24Y2(622) -

2& 2Y2Ton)
3&3Y2Ton
4 Ton
5 Ton

GENERAL

_ J

INFORMATION

PERSONAL INJURY, AND/OR PROPERTY
HAZARD

DAMAGE

The information contained in this manual is intended
for use by a qualified service technician familiar with
safety procedures and equipped with the proper
tools and test instruments.
Installation must conform with local building codes
and with the National Electrical Code NFPA70 current
edition.

INTRODUCTION
The MF modular blower cabinet uses a 208/230V PSC blower
motor, with an electronic fan control board. The MF may be used for
cooling or heat pump applications either with or without electric
heat. Installations without electric heat require a NO HEAT KIT
(EHIA00KN10). The
cabinet can be installed in an upflow,
downflow or horizontal position. Refer to Figure 3 and 4.

LOCATION
Select the best position which suits the installation site conditions.
The location should provide adequate structural support, space in
the front of the unit for service access, clearance for return air and
supply duct connections, space for refrigerant piping connections
and condensate drain line connections. If heaters are being

Specifications

make sure adequate clearance is maintained from supply
See Clearances and Warning in Figure 1.
is located in an area of high humidity, nuisance sweating
may occur. On these installations a wrap of 2" (51mm)
insulation with a vapor barrier should be used.

HEATER

Failure to carefully read and follow this warning could
result in personal injury, death, equipment malfunction, and/or property damage.

installed,
ductwork,
If the unit
of casing
fiberglass

PACKAGES

Factory approved, field installed, UL listed heater packages are
available from the equipment supplier. See unit rating plate for a list
of factory approved heaters (electric heat accessory models EHIA
only). Heaters that are not factory approved could cause damage
which would not be covered under the equipment warranty.

CUTHAZARD
Failure
jury.

to follow this caution

may result in personal

in-

Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate
protective
clothing
and
gloves when handling parts.

INSTALLATIONS
The unit is ready to install in any position without modifications.
Refer to the coil instructions for information on drain pan
configurations etc. Make sure coil is set up properly for desired
position of blower cabinet.
Coil must be secured to blower cabinet with the three tabs that are
part of the blower cabinet base. Bend the tabs out from the bottom
so they fit over the coil cabinet.
Position coil cabinet in relation to the blower so they will be correct
for desired application.

are subject to change without notice.

442 01 2206 01

For upflow and horizontal applications apply foam seal strip around
top of coil cabinet. For downflow application apply foam seal strip
around bottom of coil cabinet. Set blower on top of coil cabinet so
they are flush. Secure cabinets together using the three tabs on the
bottom of the cabinet. Bend the tab out from the bottom so it fits over
the coil cabinet. If no pilot holes are present, drill a hole as required
for a screw.

Attach

Coil to Blower

Cabinet

DOWNFLOW

INSTALLATIONS

Refer to instructions with Subbase Kit.

NON-DUCTED
INSTALLATION

RETURN

AIR CLOSET

The cabinet can be installed in a closet with a false bottom to form a
return air plenum, or mounted on an open platform inside the closet.
Platform should be high enough to provide a free (open) area for
adequate return airflow into the bottom of the cabinet. The open
area can be on the front side or a combination of front and sides,
providing there is clearance on the sides between cabinet and
closet. Refer to ACCA Manual D for sizing and free area
recommendations.
NOTE: Local codes may limit application of systems without a
ducted return to single story dwellings.

HORIZONTAL
LEFT AND RIGHT
INSTALLATIONS
The modular blower cabinets can be installed in either downflow,
horizontal left, or horizontal right applications. When a coil cabinet
is applied, refer to the coil installation manual for proper drain pan
and airflow requirements.
They must have the drain pan
repositioned for right hand airflow. Refer to coil installation manual.

PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
A field fabricated auxiliary drain pan, with a separate
drain is REQUIRED for all installations over a finished
living space or in any area that may be damaged by
overflow from a restricted main drain pan. In some localities, local codes require an auxiliary drain pan for
ANY horizontal installation.
z/
//

Airflow

Positions

//
HORIZONTAL RIGHT POSITION

Airflow

Positions
....

UPFLOW
POSITION

DOWNFLOW
POSITION

/ \

// //
/ /
, /
/
/

/ '\

// //
,/' //

\\
\

\
\

COIL

\.
\

t' /'
....................................................
' ii

HORIZONTALLEFT POSITION

\\
\\

\
\ \
,, \

\'_
O

i"x"_
' / \
\
/ ,,; \ \_
'

' /
/
/

/
/

COIL

iJ
j

i
\

i
iJ

i i
HEATER

........................................................................................
_
Subbase
Accessory

442 01 2206 01

Specifications

SUSPENDED

CABINET

INSTALLATION

1. The cabinet may be supported on a frame or shelf, or it may
be suspended.
2. Use metal strapping or threaded rod with angle iron supports
under the auxiliary drain pan to suspend cabinet. These
supports MUST run parallel with the length of the cabinet.
Refer to Figure 5.
3. Ensure that there is adequate room to remove service and
access panels after installing supporting brackets.

are subject to change without notice.

4. Place field installed vibration isolators in auxiliary drain pan
to support cabinet.

Figure 6

J Fan Control Board

DUCT CONNECTIONS
Supply Duct
Supply duct must be attached to the outside of flange on outlet end
of unit. Flexible connectors may be used if desired. Maintain
clearances from supply duct to combustibles when heaters are
installed. Refer to Figure 1 and unit rating plate.
Return Duct
Return duct should be attached to bottom of unit using sheet metal
screws or other fasteners.

FILTER INSTALLATION
Filters must be field supplied. A remote filter grille or other means
must be provided. Refer to ACCA Manual D for remote filter sizing.

w_I

Horizontal Installation

See Note
Below

All electrical work MUST conform with the requirements of local
codes and ordinances and the National Electrical Code NFPA 70
current edition.
The low voltage transformer and the fan control are standard on all
models and are prewired at the factory. Line voltage connections
are made to the heater accessory or the lugs on the No Heat Kit.

OVERCURRENT

PROTECTION

The power supply wiring to the unit MUST be provided with
overcurrent protection. Governing codes may require this to be
fuses ONLY or circuit breakers.
Vibration
Isolators

Field-Fabricated
Drain Pan

For blower cabinets without heaters, a 15 amp circuit may be used.
38-=-_

Supports MUST run parallel with blower cabinet
NOTE: If increased structural strength is needed in the horizontal
position, use field supplied two connecting plates in place of the
tabs on the bottom of the blower.

ELECTRICAL

CONNECTIONS

The MF modular blower utilizes an electronic fan control board
which has a low voltage circuit protective fuse (5 AMP), and pigtail
connections for thermostat hook up. The fan control also has a relay
for blower operation, and built in 90 second blower-off time delay
relay (TDR). To disable the TDR feature, snip the jumper wire JWl.
Refer to Figure 6.

Before proceeding with electrical connections, make certain that
supply voltage, frequency, phase, and circuit ampacity are as
specified on the unit rating plate. See unit wiring label for proper
field high and low voltage wiring. Make all electrical connections in
accordance with the NEC and any local codes or ordinances that
may apply. Use copper wire only. The unit must have a separate
branch electric circuit with a field-supplied
disconnect switch
located within sight from and readily accessible from the unit.
NOTE: When a pull-out type disconnect is removed from the unit,
only the Load side of the circuit is de-energized.
The Line side
remains live until the main (remote) disconnect is turned off.

ELECTRICAL
ELECTRICAL

SHOCK or UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.
If a disconnect switch is to be mounted on unit, select a location where drill and fasteners will not contact electrical refrigeration components.

Specifications

SHOCK or UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.
Turn OFF electric power at fuse box or service panel
before making any electrical connections and ensure a proper ground connection is made before
connecting line voltage.

are subject to change without notice.

442 01 2206 01

LOW VOLTAGE

ELECTRICAL
SHOCK

HAZARD

Failure to follow this warning could result in personal injury or death.
Turn off the main (remote) disconnect device before
working on incoming (field) wiring. Incoming (field)
wiring on the line side of the disconnect found in
the modular blower unit remains live, even when the
pull-out is removed. Service and maintenance to
incoming (field) wiring cannot be performed until
the main disconnect switch (remote to the unit) is
turned off.

CONTROL

CONNECTIONS

Wire low-voltage in accordance with wiring label on the blower
(also refer to Figures 8- 12. Use 18 AWG color-coded, insulated
(35°C minimum) wire to make the low-voltage
connections
between: thermostat, indoor equipment, and outdoor equipment. If
thermostat is located more than 100 feet (31m) from the unit (as
measured along the tow voltage wire), use 16 AWG color-coded,
insulated (35°C minimum) wire. All wiring must be NEC Class 1 and
must be separated from incoming power leads. Refer to outdoor
unit wiring instructions for additional wiring recommendations.
Field supplied low-voltage wiring should be field connected inside
control splice box area (secure with wire nuts), and strain relief
bushing or rubber grommet to seal cabinet opening.

Figure
MF units installed without electric heat require the use of a
factory-authorized
No Heat Kit (accessory
part number
EHIA00KN10).
This kit provides the electrical connections
necessary to supply the unit with 208/230V power when electric
heat is not present.
For units without electric heat:

Electrical Controls

Low Voltage
Connections

Locate adapter and filler plates
with screws inside
package. If necessary, adjust plates to allow for installation
of No Heat Kit required inside cabinet. Refer to Figure 7.
2.
Secure No Heat Kit accessory with four (4) screws.
3.
Connect the 9-pin plug from No Heat Kit wiring into the
receptacle that attaches to fan control board.
4.
Connect ground wire to unit ground lug.
5.
Connect 208/230V power leads from field disconnect to
terminal block assembly on No Heat Kit.
For units with electric heat, see Electric Heater Installation
Instructions and blower airflow requirements.
NOTE: Transformer is factory-wired for 230V operation. For 208V
applications the transformer must be rewired to the 208V tap. Refer
to unit wiring label.

GROUNDING

Filler Plate
Adapter Plate

_
-.\

No Heat Kit.

',\,
\,
\,
\

Control Splice Box

Lugs for
Line Voltage
and Ground
Connections

CONNECTION

Use a copper conductor(s) from the ground lug on the No Heat Kit
or ground lugs on the electric heater to a grounded connection in the
electric service panel or a properly installed grounding rod.
Supply Circuit

Table 1
Volts

Phase

Hertz

Supply
Circuit
No.

H.P.

Max.
Motor
Amps

MCA
Branch
Circuit
AMP

Protection
Devise
(Am ps)

MF08*

208
230
230

MF20*

230
208
230

# of
Wires

Min
Size

2.9

3.6

1/2

2.9

3.6

3/4

6.0

7.5

Single

1/3

2.5

Single

1/2

Single

208
MF16*

Supply Wire
75°C copper

3.1

208
MF12*

Recommended

Max Overcurrent

Ground Wire
Max.

Ft.(m)
Length

105
(32)
105
(32)
105
(32)
9O
(27)

# of
Wires

Min
Size

* Modular blower without electric heat

442 01 2206 01

Specifications

are subject to change without notice.

Figure 8

Wiring Layout Air Conditioning Unit
(Cooling Only)

Wiring Layout Heat Pump Unit (Cooling and Two-Stage Heat with One
Outdoor Thermostat)

Figure 11

THERMOSTAT
m

RED
_

THERMOSTAT

GRY

[]

HEAT PUMP
(CONTROL)

[]
Fq

AIR COND.

Wa.____._.___
ODTS
E

ODT__
O

z_
Figure 9

Wiring Layout Air Conditioning Unit
(Cooling and Single-Stage Heat)

THERMOSTAT

Wiring Layout Heat Pump Unit (Cooling and Two-Stage Heat with Two
Outdoor Thermostats)

RED
GRY

Figure 12

R
G

THERMOSTAT
m

HEAT PUMP
(CONTROL)

AIR COND.

_WHT
VlO

L_
W2

PIN_

Fq
Figure 10

Wiring Layout Heat Pump Unit (Cooling and Single-Stage Heat with No
Outdoor Thermostat)
HEAT PUMP
(CONTROL)

THERMOSTAT

ODTS

O
y

R
G
C

Fq
Fq

,
W2

;:3

4Q_

Specifications

are subject to change without notice.

442 01 2206 01

CHANGING

MOTOR

SPEED

4. Ensure the coil and filter are clean, and all the registers are
open.

To change the blower speed, disconnect the black wire at the blower motor terminal block and reconnect at the desired blower speed
tap (refer to Table 4 ).

5. Determine
operating.

HEATER STAGING

2-1

Heat Strip Staging
2-2

Single-Stage
Operation
(no staging - all
electric heat
SinglePhase

ThreePhase

together)
EHIA05KB / KN
EHIA07KB / KN
EHIA10KB / KN
EHIA15KB
EHIA20KB
EHIA25KB
EHIA10HB
EHIA15HB
EHIA20HB
EHIA25HB

with the blower

7. Refer to Motor Speeds and Airflow in these instructions if the
speed is to be changed.
8. Recheck the external static pressure with the new setting,
and confirm speed switch selection.

Static Pressure Check

SupplyS

2-3
Three-Stage

Two-Stage

Capable

(with ODTS

Indoor
Section

only)
EHIA15KB
EHIA20KB
EHIA25KB

EHIA25KB10

TEMPERATURE

RISE CHECK

Temperature rise is the difference between the supply and return air
temperatures.
EHIA10HB
EHIA15HB
EHIA20HB
EHIA25HB

EHIA20HB
EHIA25HB

NOTE: The temperature rise can be adjusted by changing the heating speed tap at the unit's blower terminal block. Refer to the unit's
Installation Instructions for airflow information.
A temperature
mended.

KB is single-phase with circuit )reaker
KN is single-phase with terminal block (no-breaker)
HB is three-phase with circuit breaker
Table 3

static pressure

6. Refer to the Air Flow Data, Table 4, to find the speed setting
that will most closely provide the required air flow for the
system.

The modular controls are factory circuited for single-stage electric
heat operation. Refer to Table 2 for available heaters and Table 3
for unit airflow based without a coil, filter, or electric heat applied.
When two-stage electric heat is desired (refer to Table 2 - Heat
Strip Staging), separate out the pink W3 wire from W2 & E
connections. Refer to Table 2-2 and wiring diagram Figure 11. W3
can be separated and controlled by the indoor wall thermostat (if
multi-stage capable), or by an outdoor thermostat (ODTS). Refer to
ODTS kit instruction for proper wiring.
When three-stage electric heat is desired, cut the W2 wire nut off
and discard. Strip W2, W3, and E. Refer to Table 2-3, and wiring
diagram Figures 12. Connect according to the thermostat kit
instructions or ODTS kit instructions for proper wiring.

Table 2

the external

Minimum Motor Speed Tap Selection For
Electric Heater

Model
MF08

Electric Heater SIZE kW
5kW
7.5kW
10kW
15kW
LOW
LOW
LOW
MED

20kW
....

25kW

MF12
MF16

LOW
LOW

LOW
MED

MED
MED

-HIGH

MF20

LOW

MED

rise greater

than 60°F (33.3°C)

is not recom-

To check the temperature rise through the unit, place thermometers in the supply and return air ducts as close to the
unit as possible,avoiding direct radiant heat from the heater
elements.

Open ALL registers and duct dampers.

Set thermostat

Set the thermostat temperature setting as high as it will go.

Turn electric power ON.

Operate unit AT LEAST 5 minutes, then check temperature
rise.

Heat-Cool

selector to HEAT.

NOTE: The maximum outlet air temperature for all models is 200°F
(93.3°C).

LOW = low speed tap selection
MED : medium speed tap selection
HIGH - high speed tap selection

AIR FLOW CHECK

Set thermostat to normal temperature setting.

Be sure to seal all holes in ducts if any were created during
this process.

For proper system operation, the air flow through the indoor coil
should be between 350 and 450 cfm per ton of cooling capacity. The
air flow through the unit can be determined by measuring the
external static pressure to the unit and selecting the motor speed
tap that will most closely provide the required air flow.
1. Set up to measure external static pressure at the supply and
return duct connections. Refer to Figure 13.
2. Drill holes in the ducts for pressure taps, pilot tubes, or other
accurate pressure sensing devices.
3. Connect these taps to a level inclined manometer or draft
gauge.

442 01 2206 01

Specifications

are subject to change without notice.

Airflow Based on no coil, no filter, no electric heat. Deduct heater static shown in heater static table. Deduct coil
static, See Coil Specification Sheet. Deduct .20 in wc (50 Pa) for Downflow Subbase Kit.
I

Table 4

Airflow

MF08
SPEED VOLTS
230v
Low

Med

High

0.30

Med

High

0.50

0.60

0.70

0.80

1029 1020 1007

985

960

915

862

872

230v

1286 1270 1254 1220

860

845

High

721

230v

1500 1470 1432 1380

1315 1250 1168

208v

1317 1305 1286 1255

1220 1170 1008

947

Low

Med

High

in wc
0.20

0.30

0.40

0.50

0.60

0.70

0.80

973

975

979

973

955

931

208v

811

815

816

810

797

780

749

230v

1284 1295 1301 1305

SPEED
Low

1302 1280 1246

208v

1084 1084 1084 1090

1089 1065 1030

230v

1663 1670 1671 1655

1631 1585 1519

208v

1383 1385 1390 1390

1383 1365 1328

Med

High

in wc
0.20

0.30

0.50

0.60

0.70

0.80

1020 1015 1009 1002

991

975

950

208v

858

801

780

749

230v

1379 1385 1386 1379

830

815

SPEED
Low

1364 1343 1309

208v

1156 1154 1149

230v

1776 1782 1783 1765

1738 1698 1643

208v

1496 1496 1496 1495

1495 1470 1433

1144 1134 1120 1098

Med

High

in wc
0.20

0.30

0.40

0.50

100

125

149

174

199

230v

486

481

475

465

453

432

407

208v

412

406

399

389

376

361

340

230v

607

599

592

576

557

531

499

208v

525

521

515

505

492

472

447

230v

708

694

676

651

621

590

551

208v

622

616

607

592

576

552

476

VOLTS

100

125

149

174

199

230v

459

460

462

459

451

439

208v

383

385

382

376

368

353

230v

606

611

614

616

614

604

588

208v

512

514

503

486

230v

785

788

789

781

770

748

717

208v

653

654

656

653

644

627

MF16

230v

845

0.40

VOLTS

MF12

230v

SPEED VOLTS

Med

765

1042 1000

MF20

Low

797

SPEED

1180 1125 1058

1113 1105 1091 1070

SPEED VOLTS

Med

825

208v

MF16

Low

MF08

0.40

208v

SPEED VOLTS

only, no coil attached

in wc
0.20

MF12

Low

is blower

VOLTS

100

125

149

174

199

230v

481

479

476

473

468

460

448

208v

405

399

392

385

378

368

353

230v

651

654

651

644

634

618

208v

546

545

542

540

535

529

518

230v

838

841

833

820

801

775

208v

706

694

676

MF20
0.60

0.70

0.80

230v

1492 1495 1492 1475

1451 1395 1308

208v

1246 1245 1238 1225

1203 1175 1125

230v

1969 1955 1935 1890

1818 1700 1570

208v

1641 1640 1633 1615

1584 1510 1406

230v
208v

2696 2600
2417 2355

2492 2350 2192 2020 1844
2287 2200 2092 1940 1774

Specifications

SPEED
Low

Med

High

VOLTS

100

125

149

174

199

230v

704

706

704

696

685

658

617

208v

588

584

578

568

555

531

230v

929

923

913

892

858

802

741

208v

774

771

762

748

713

664

230v
208v

1272 1227 1176 1109 1034
1141 1111 1079 1038 987

953
916

870
837

are subject to change without notice.

442 01 2206 01

ELECTRIC HEATER STATIC PRESSURE DROP
Single-Phase
CFM

Single-Phase

L/s

in wc
600

0.01

700

0.01

800

0.01

900

0.01

1000
1100

Pa
-

283

0.01

330

0.01

378

0.01

425

0.01

0.02

472

0.01

0.02

519

1200

0.01

0.02

566

1300

0.01

0.02

613

1400

0.01

0.02

0.03

661

1500

0.01

0.02

0.03

0.04

708

1600

0.01

0.02

0.03

0.04

755

1700

0.01

0.02

0.03

0.04

802

1800

0.01

0.02

0.03

0.04

849

1900

0.01

0.02

0.03

0.04

0.05

897

2000

0.01

0.02

0.03

0.04

0.05

944

Three-Phase

Three-Phase
EHIA

CFM

N/A

EHIA
IEHIA
10
15

IEHIA
20

IEHIA
25

L/s

N/A

IEHIA
15

in wc
600

_'_',_'_

800
700
900

\\\\\

1100

IEHIA
20

I EHIA
25

0.01

0.01
0.01

0.01

425

472
378

2
2

5
-

519

,_._._,._'_

661
566
613

_"\_._\
_
_

5
2
5

5
5

7
5
5

-7
-

0.01

0.02

0.01
0.02

0.02
0.01
0.02

0.02
0.02

1400

0.02

0.03

1500

0.02

0.03

0.04

1600

0.02

0.03

0.04

755

0.02

0.03

0.04

802

849

897

944

1200
1000
1300

1700
1900
1800
2000

_\_'_

442 01 2206 01

0.02
0.02
0.02

0.03
0.03
0.03

0.04
0.04
0.04

Specifications

0.05
0.04
0.05

are subject to change without notice.

710
9

ACCESSORIES
ELECTRIC

Figure

Wiring

Layout

of Humidifier

Pump

to Heat

AIR CLEANER

The Electronic Air Cleaner may be connected to MF as shown in
Figure 14. This method requires a field supplied transformer. See
Electronic Air Cleaner literature for kit requirements.

MODULAR
BLOWER
(CONTR._.OL)

THERMOSTAT

HEATPUMP
(CONTROL)

Wiring Layout of Electronic Air
Cleaner to Modular Blower

Figure 14

CONTROL

BOARD

FAN RELAY /

R G

C C C

III

230VAC
WIRE

SPT

,,/!,,

NO NC

208/230V

COM
I

CONVERSIONKIT II

24VAC

, , , !1

TOTRANSFORMER
_1
BLOWER

I ¢'_q

MOTOR

I'
'TO

)COM

, , II

I P_'q

EAC'

I I

FAN HUMIDIFIER

M'I

HUMIDISTAT

208/230V
FROM MOLEX
PLUG AND
TRANSFORMER
(IN UNIT)

SEQUENCE

HUMIDIFIER

OF OPERATION

A. CONTINUOUSFAN
Connect
shown

humidifier

and humidistat

in Figures

Figure

to modular

blower unit as

15 and 16.

Wiring Layout of Humidifier
lar Blower with Electric

to ModuHeat

MODULAR
BLOWER
(CONTROL)

THERMOSTAT

RED

GRY

Thermostat closes R to G. G energizes fan relay on FAN
CONTROL BOARD which completes the high voltage circuit to indoor blower motor. When G is de-energized, there is a built in 90
second blower-off time delay relay (TDR). To disable the TDR feature, snip the jumper wire JWl.

B. COOLING
Air Conditioner

MODE
Only:

Thermostat energizes R to G and Y. G energizes fan relay on fan
control board which completes high-voltage circuit to indoor blower
motor. Y energizes the 24 tow-voltage contactor in condensing
unit. When call is satisfied, Y drops out and there is a 90 second
blower TDR before fan relay opens.

Heat Pump:
W3

I
II

E
L_J_N--

I \

AIR COND.

C__c

HUMIDISTAT

' -[____

-0

115V
_mm

C. HEAT PUMP
Cooling Mode:

)

Same as above - except thermostat will also energize O for reversing valve operation in cooling mode. O will typically remain energized by the thermostat (after cooling call is satisfied), or until the
mode is changed to heating.

-0

Thermostat energizes R to G, Y and O. G energizes indoor an relay
on fan control board which completes high-voltage circuit to indoor
blower motor. Y energizes the outdoor 24V low-voltage circuit in
heat pump to energize compressor. O energizes reversing valve in
cooling mode and typically remains energized until the mode is
changed to heating. When thermostat cooling call is satisfied. Y
drops out. O remains energized, and there is a 90 second TDR before indoor fan relay opens.

Specifications are subject to change without notice.

442 01 2206 01

Heating
Mode:
through N.C. (normally closed) contacts on fan relay. When W is
Thermostat
energizes
RtoGandYonly(noOsignalinheating). de-energized, electric heat relay(s) opens.
Genergizes
indoor
fanrelayonfancontrol
boardwhichcompletes CARE AND MAINTENANCE
high-voltage
circuit
toindoor
blower
motor.
Yenergizes
theoutdoor
24Vlow-voltage
circuit
inheatpumptoenergize
compressor.
The The system should be regularly inspected by a qualified service
reversing
valveisnotenergized
inheating
unlessadefrostcycle technician. Consult the servicing dealer for recommended frequency. Between visits, the only consumer service recommended
should
occur.
Whencallissatisfied,
Ydropsoutandthereisa90
or required is air filter maintenance and condensate drain operasecond
TDRbefore
indoor
fanrelayopens.
tion.
D. HEAT PUMP HEATING
ELECTRIC HEAT

WITH AUXILIARY

AIR FILTER
Inspect air filters at least monthly and replace or clean as required.
Disposable type filters should be replaced. Reusable type filters
may be cleaned by soaking in mild detergent and rinsing with cold
water. The frequency of cleaning depends upon the hours of operation and the local atmospheric conditions. Install filters with the arrows on the side pointing in the direction of air flow. Clean filters
keep unit efficiency high.

Cooling Mode:
Same operation as above in Heat Pump Cooling Mode.
Heating Mode:
Same operation as above in Heat Pump Heating Mode with the addition of W. Thermostat energizes R to G, Y, and W. W energizes
electric heat relay(s) which completes circuit to heater element(s).
When W is de-energized, electric heat relay(s) open, turning off
heater elements. The White wire in pigtail connects W2, W3, and
E together. This maybe separated for heater staging when available, see electric heat kit for more information.

E. ELECTRIC
MODE

HEAT OR EMERGENCY

LUBRICATION
The bearings of the blower motor are permanently lubricated.

CONDENSATE

HEAT

During the cooling season check the condensate drain lines to be
sure that condensate is flowing from the primary drain but not from
the secondary drain. If condensate ever flows from the secondary
drain, the unit should be promptly shut off and the condensate pan
and drains cleaned to insure a free flowing primary drain.

Thermostat closes R to W. W energizes electric heat relay(s) which
completes circuit to heater elements(s). Blower motor is energized
THiS

(
POWER

COMPARTMENT

COX)LING

CONTReL

MUST

DRAINS

BE CLOSED

EXCEPT

FOR

SERVICING

ONLY

( COMPONENTARRANGEMENT )

WIRING

PER

COM
1411_l

LFELD

SEE F_TING

24V

2°s
vo_1131Ig@

SEE NOTE#1

PLATE

DISCONNECT

GND FOR VOLTS & HERTZ

NEC

230V_

SYS rEM iR,_SFORMER

PLUG

JYEL
7

t t,
9

BLK

40,0 VA

FAN COIL 5.0VA
j

REMAN

NG VAAVA LABLE:

35,0 VA

BLK

SEE NOTE #5

_LK

IXvl
BRN oLoj
L

_FM_

n_
THERMOSTAT
L<.
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ICP Air Handler (indoor Blower&evap) Manual L0909283

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