Ecoer E-EHK05 User manual

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Air Handler Unit Installation Instruction
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Installation Manual
High Efficiency Air Handlers
2-3-4-5Ton Capacity
R - 41 0A T XV I n si de
Contents
1. Safety --------------------------------------------- 2
2. Dimensions -------------------------------------- 4
3. Applications--------------------------------- 6
4. Electrical Wiring ------------------------------- 9
5. Airflow Performance --------------------------15
6. Ductwork ----------------------------------------17
7. Pipe Connections-------------------------------18
8. Air Filter -----------------------------------------19
9. TXV Adjustment --------------------------------20
NOTE: Appearance of unit may vary.
Installation must be performed in accordance
with the requirements of NEC and CEC by
authorized personnel only.
All phases of this installation must comply with National, State and Local Codes.
This document is customer’s property and is to remain with this unit. Please return it to
customer with service information upon completion of work.
These instructions are intended as an assist to qualified and licensed personnel for proper
installation, adjustment and operation of ECM air handler units. Read it thoroughly before
attempting installation or service work. Failure to follow these instructions may result in fire,
electrical shock, property damage, personal injury or death.
The instructions do not cover all variations in systems or provide for every possible contingency
to be met in connection with the installation.

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Air Handler Unit Installation Instruction
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1. Safety
Read the following safety instructions before installing the unit or doing service work.
WARNING may cause personal death or seriousinjury.
CAUTION may lead to injury or structural damage under some conditions.
WARNING
Disconnect all power to unit before installing or servicing. More than one disconnecting switch may be
required to de-energize the equipment. Hazardous voltage can cause server personal injury or death.
Installation and maintenance must be performed by authorized personnel only.
Consumer service is recommended only for filter cleaning/replacement. Never operate the unit with the
access panels removed.
Failure to inspect pipes or use proper service tools may result in equipment damage or personal injury.
if using existing refrigerant pipes, make sure that all joints are brazed, not soldered.
The unit must be permanently grounded.
Failure to do so can result in electrical shock causing personal injury or death.
PROPOSITION 65: This appliance contains fiberglass insulation. Respirable particles of fiberglass are
known to State of California to cause cancer. All manufacturer products have to meet current federal
OSHA Guidelines for safety.
California Proposition 65 warnings are required for certain products that are not covered by the OSHA
standards. It requires warnings for products sold in California that contain or produce any of over 600
listed chemicals known to the State of California to cause cancer or birth defects such as fiberglass
insulation, lead in brass, and combustion products from natural gas.
All “new equipment” shipped for sale in California will have labels stating that the product contains and
/or produces Proposition 65 chemicals. Although we have not changed our processes, having the same
label on all our produced facilitates manufacturing and shipping. We cannot always know “when or if”
products will be sold in the California market. You may receive inquiries from customers about chemicals
found in, or produced by, some of our heating and air-conditioning equipment, or found in natural gas
used with some of our products. Listed below are those chemicals and substances commonly associated
with similar equipment in our industry and other manufacturers.
• Glass Wool (Fiberglass) Insulation
• Carbon Monoxide (CO).
• Formaldehyde
• Benzene
More details are available at the websites for OSHA (Occupational Safety and Health Administration), at
www.osha.gov and the State of California’s OEHHA (Office of Environmental Health Hazard Assessment)
at www.oehha.org. Consumer education is important since the chemicals and substances on the list are
found in our daily lives. Most consumers are aware that products present safety and health risks, when
improperly used, handled and maintained.

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Air Handler Unit Installation Instruction
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WARNING
If removal of the blower assembly is required, all switches supplying power to the equipment must be
disconnected and locked so the field power wires can be safely removed from the blower assembly.
Failure to do so can cause electrical shock resulting in personal injuring or death.
Make sure the blower motor support is tight (3-motor mount bolts),
then check if the wheel is secure to motor shaft before operating unit.
The first 6 inches of supply air plenum and ductwork must be constructed of sheet metal as required by
NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly after the air
handler unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are
used, they may be located only in the vertical walls of rectangular plenum, a minimum of 6 inches from
the solid bottom. Metal plenum of duct may be connected to the combustible floor base, if not, it must be
connected to the unit supply duct exposed to the supply air opening from the down-flow unit.
Exposing combustible (non-metal) material to the supply opening of a down-flow unit may cause a fire
resulting in property damage, personal injury or death.

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Air Handler Unit Installation Instruction
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2. Dimensions
SUPPLY AIR
W
A
NOTE: 25’’ CLEARANCE IS REQUIRED IN THE
FRONT OF THE UNIT FOR FILTER AND COIL
MAINTENANCE.
D
10-5/16
FLANGES ARE PROVIDED
FOR FIELD INSTALLATION
Breaker Switch
(Electric heat only)
High voltage connection
7/8’’, 1-3/32’’, 1-23/32’’ DIA knockouts
KNOCKOUTS FOR ELECTRICAL
WIRING CONNECTION ARE
DISTRIBUTED ON THE TOP AND
EITHER SIDES.
H
Flared Gas Line
Flared Liquid Line
Auxiliary drain connection 3/4’’
Female pipe thread (NPT)
Inlet (Front View)
Primary drainconnection3/4’’
Female pipe thread (NPT)
Figure 2-1 Unit Dimensions
Inlet (Left Side View)
Model Number
Dimensions (in.)
H W D A
Liquid Line
Connection
Gas Line
Connection
24 / 36
46-1/2
21
21
19-1/4
3/8
3/4

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Air Handler Unit Installation Instruction
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48 / 60
56
24-1/2
21
22-3/4
3/8
7/8

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Air Handler Unit Installation Instruction
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Select a solid and level site, keep enough space for proper installation and maintenance.
Adjust motor speed tap on indoor PCB to select correct air flow according to blower performance table.
a) Horizontal Position
b) Vertical Position
Figure 2-2 Clearance requirement

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Air Handler Unit Installation Instruction
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3. Applications
3.1 Vertical up-flow
Vertical up-flow configuration is the factory setting on all models.
If return air is to be ducted, install duct flush with floor. Use fireproof resilient gasket 1/8 to 1/4 in. thick
between the ducts, unit and floor. Set unit on floor over opening.
IMPORTANT
Lightly tighten the drain connections so it won’t leak.
Using excessive force may cause damage to the drain connections. Torque applied to drain connections
should not exceed 10.ft.lbs.
Figure 3-1 Dimensions for front connection coil
3.2 Vertical down-flow
A vertical up-flow unit may be converted to vertical down-flow. Remove the front panel and take out the
indoor coil assembly with drain pan, reinstall 180°from original position (Figure 3-2 and 3-3).
IMPORTANT
To comply with safety standards and the National Electrical Code for down-flow application, the circuit
breaker(s) on field-installed electric heat kits must be re-installed so that the breaker switch “ON” position
marking is up and “OFF” position marking is down.
CAUTION
Do not install this air handler to vertical down-flow when the motor speed must be TAP4 or TAP5.
When using the unit with electric heat kits, the switch is used only for electric heat on the front of panel.
3.0”
(40)

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Air Handler Unit Installation Instruction
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3.3 Horizontal left-flow
CAUTION
Do not install this air handler to horizontal left-flow when the motor speed must be TAP4 or TAP5.
Horizontal right-flow is another default factory configuration for the units. These units may be converted to
horizontal left-flow by removing indoor coil assembly with drain pan and reinstalling it as shown below.
• Rotate the unit 90°into the horizontal left position, with the coil compartment on the right and the blower
compartment on the left.
• Reinstall the indoor coil 180°from original position. Ensure the retaining channel is fully engaged with the
coil rail(Figure 3-2 and 3-3).
• Secondary drain pan kits are required when the unit is configured for the horizontal position over a
finished ceiling and/or living space.
Figure 3-2 Horizontal left-flow and vertical down-flow and application

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Air Handler Unit Installation Instruction
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Figure 3-3 Dimensions for front connect coil
CAUTION
Horizontal units must be configured for right hand air supply or left hand air supply.
Horizontal drain pan must be located under indoor coil. Failure to use the drain pan can result in property
damage.
3.4 Installation in an unconditioned space
There are two pairs of coil rails in the air handler for default and counter flow application. If the air handler is
installed in an unconditioned space, the two unused coil rails should be removed to minimize air handler surface
sweating. The coil rails can be easily removed by taking off the 6 mounting screws from both sides of the cabinet.

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Air Handler Unit Installation Instruction
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4. Electrical Wiring
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any applicable local ordinance.
WARNING
Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required
to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
4.1 Power Wiring
It is important that proper electrical power is available for connection to the unit model being installed. Refer
to the unit nameplate, wiring diagram and electrical data in the installation instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of, and readily
accessible to the unit.
• When the electric heat is installed, units may be equipped with one or two 30~60 amp. circuit breakers.
These breakers protect the internal wiring in the event of a short circuit and serve as a disconnect. Circuit
breakers installed within the unit do not provide over-current protection of the supply wiring and therefore
may be sized larger than the branch circuitprotection.
• Supply circuit power wiring must be 167°F minimum copper conductors only. Refer to electrical data in this
section for ampacity, wire size and circuit protector requirements. Supply circuit protective devices may be
either fuses or “HACR” type circuit breakers.
Figure 4-1 Wiring Diagram

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Air Handler Unit Installation Instruction
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4.2 Control Wiring
Class 2 low voltage control wiring should not be run in conduit with main power wiring and must be separated
from power wiring, unless class 1 wire of proper voltage rating is used.
• Low voltage control wiring should be color-coded 18 AWG. For lengths longer than 100 ft., 16 AWG. wire
should be used.
• Refer to wiring diagrams attached to indoor and outdoor sections to be connected.
• Make sure separation of control wiring and power wiring has been maintained.
NOTES:
1. Be sure power supply agrees with equipment nameplate.
2. Power wiring and grounding of equipment must comply with local codes.
3. Low voltage wiring to be No. 18 AWG minimum conductor.
4. “ ” means the electric auxiliary heat connection. Some thermostats may use W2/AUX for heat pump.
Figure 4-2 Schematic diagram for control wiring connection
Ecoer thermostat (EST01) has a default system type 10 designed for Ecoer heat pump to match with most
traditional indoor air handlers or furnaces. To get two-stage fan control for E series air handlers, system type
must be chosen to Type 9, 11, 12 and 13 accordingly.
Follow below steps to set SYSTEM TYPE
a) Press Menu at EST01 homepage, the screen will display DATE TIME, then press Next until you see
FACTORY SET.
b) Press Edit, the screen will display SYSTEMTYPE
c) Press + or - to set, then press Done to save the setting for system type.
G R C
INDOOR UNIT
W1
G2 C Y O W
G2
Y1
W*
GREEN RED
B
L
A
C
K
/
B
R
O
W
N
WHITE
BLACK YELLOW ORANGE WHITE

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Air Handler Unit Installation Instruction
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System Types List
Type Descriptions Application Required Terminals
0 Cool only ESI (AC only) + Air Handler C, RC, Y1, G
3 Cool only ESI + Air Handler C, RC, Y1, O, G
6 1H/1C ESI + Air Handler C, RH, Y1, O, G, *W2
8 1H/1C ESI + Air Handler
See details on EST Install and
User Guide
9 1H/2C (G/G2) ESI + E series Air Handler
10
(Default)2H/1C ESI + Air Handler
ESI + Gas Furnace
11 2H/2C (G/G2) ESI + E series Air Handler
12 Cool only (G/G2)
AC only + E series Air Handler
13 Cool only (G/G2) + W2
REMARKS:
No output from EST01 at O terminal if select Type 8 ~ 13.
Type 6 can be used as a BACKUP for heat pump (Normal O signal output) application without two-stage fan control in
cooling.
ESI- Ecoer Smart Inverter condensing unit * means optional connection
4.3 Grounding
WARNING
The unit must be permanently grounded.
Failure to do so can result in electrical shock causing personal injury or death.
• Grounding may be accomplished by grounding metal conduit when installed in accordance with electrical
codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground lug(s) provided in the unit
wiring compartment.
• Use of multiple supply circuits require grounding of each circuit to lug(s) provided in the unit.
4.4 Electrical Data
Model
Number Voltage-Phase-Hz Power Supply Wiring Gauge Motor HP
Motor
Steps
Minimum Circuit
AMPS. Fuse (A)
24
208/230-1Ph-60Hz 14
1/3
5
3.0
15
36
1/2
5.2
48
3/4
7.5
60
3/4
7.5

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Air Handler Unit Installation Instruction
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4.5 Electric Heat Data
Kit Model Model
Number
Electric
Heat (kW)
MIN. Circuit
Ampacity
MAX. Fuse or Breaker
(HACR) Ampacity
Fan speed
240
208
240
208
1
2
3
4
5
E-EHK05
24
5
25
22
30
25
×
●
●
●
●
E-EHK10
10
49
43
60
50
×
×
●
●
●
E-EHK05
36
5
25
22
30
25
×
●
●
●
●
E-EHK10
10
49
43
60
50
×
×
●
●
●
E-EHK15
5+10
25+49
22+43
30+60
25+50
×
×
●
●
●
E-EHK05
48
5
25
22
30
25
×
●
●
●
●
E-EHK10
10
49
43
60
50
×
●
●
●
●
E-EHK15
5+10
25+49
22+43
30+60
25+50
×
×
●
●
●
E-EHK20
10+10
49+49
43+43
60+60
50+50
×
×
×
●
●
E-EHK05
60
5
25
22
30
25
×
●
●
●
●
E-EHK10
10
49
43
60
50
×
●
●
●
●
E-EHK15
5+10
25+49
22+43
30+60
25+50
×
×
●
●
●
E-EHK20
10+10
49+49
43+43
60+60
50+50
×
×
×
●
●
●means available ×means unavailable
Electric heat kits are suitable for air handler multiple position installation.
Safety Cautions
All electric work must be performed by qualified personnel.
EHK series is designed and approved to be installed in the EAHATN series air handlers.
• Check the EHK label to confirm suitable kW selection based on room load under lowest temperature
ambient.
• Inspect all porcelain in insulators for breakage and the intact of heater element wire. Contact local
distributor immediately if thereis any occurred damage.
Warning
• Disconnect all external power supplies before performing installation and servicing. Turn off accessory
heater power switch if applicable. Failure to do so may cause serious injury.
• EHK must be properly grounded and use copper supplywires.
• Make sure to follow national electric code and local regulations.
• When installing it in an enclosed area such as a garage, heater elements should have a minimum clearance
of 18’’ from the floor to insure theproper ventilation.

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4.6 Electric Heat Installation Guide
STEP 1. Unfasten 4 screws to take away the
blower access panel of the air handler.
STEP 2. Remove cover plate based on
actual requirement.
STEP 3. Slide the kit into the duct and fasten the
element (e.g. attachment and wires).
STEP 4. Install the circuit breaker into the
mounting rail. Knock off the reserved cover for
breaker in blower access panel prior to put it
back to the unit.
3-1
3-2
4 Connect to CN6 Power Supply
1
Knock off this cover
for circuit breaker
2

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WARNING
Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required
to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
Figure 4-3 Wiring diagram for electric heat

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Air Handler Unit Installation Instruction
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5. Airflow Performance
Airflow performance data is based on cooling performance with a coil and no filter in place. Check the
Performance table for appropriate unit size selection. External static pressure should stay within the minimum
and maximum limits shown in the table below in order to ensure proper.
Model
Number
Motor
Speed
CFM (Watts)
External Static Pressure-Inches W.C.[KPa]
0
[0]
0.1
[.02]
0.16
[.04]
0.2
[.05]
0.3
[.07]
0.4
[.10]
0.5
[.12]
0.6
[.15]
0.7
[.17]
0.8
[.20]
24
Tap (5)
SCFM
1062
1031
998
981
947
901
869
823
789
742
Watts
184
195
201
203
213
222
228
238
242
252
Tap (4)
SCFM
959
921
890
873
836
786
751
706
677
622
Watts
138
145
152
156
162
171
178
188
196
204
Tap (3)-
factory
SCFM
855
825
790
769
733
679
646
595
560
494
Watts
101
111
118
120
126
134
141
151
156
166
Tap (2)
SCFM
777
750
712
692
656
599
566
498
466
412
Watts
80
89
96
98
104
113
119
127
135
145
Tap (1)
SCFM
694
663
620
599
562
499
455
390
---
---
Watts
60
68
74
76
82
89
95
104
---
---
36
Tap (5)
SCFM
1455
1409
1374
1355
1320
1266
1229
1173
1126
956
Watts
293
300
306
309
316
326
331
338
346
370
Tap (4)
SCFM
1350
1302
1264
1242
1206
1145
1104
1038
897
824
Watts
238
243
254
257
260
271
277
286
303
308
Tap (3)-
factory
SCFM
1328
1281
1234
1215
1179
1118
1073
1007
862
798
Watts
226
232
239
242
250
259
264
278
292
298
Tap (2)
SCFM
1235
1171
1130
1108
1062
1002
955
824
752
713
Watts
185
189
196
199
205
214
221
238
245
248
Tap (1)
SCFM
1146
1091
1044
1022
982
908
823
748
708
---
Watts
150
156
163
167
174
184
196
202
207
---
48
Tap (5)
SCFM
2144
2106
2072
2052
2015
1962
1924
1864
1823
1768
Watts
627
632
639
643
649
661
670
681
684
696
Tap (4)
SCFM
1999
1966
1933
1915
1875
1819
1775
1713
1672
1582
Watts
510
520
529
536
540
551
555
567
571
588
Tap (3)-
factory
SCFM
1788
1746
1714
1695
1660
1606
1565
1499
1452
1355
Watts
367
374
389
393
404
422
429
440
449
458
Tap (2)
SCFM
1633
1596
1564
1554
1514
1467
1424
1342
1290
1231
Watts
292
300
311
318
329
343
354
376
382
391
Tap (1)
SCFM
1504
1468
1428
1408
1362
1298
1244
1182
1160
1081
Watts
228
242
250
255
264
279
291
309
318
327
60
Tap (5)
SCFM
2144
2106
2072
2052
2015
1962
1924
1864
1823
1768
Watts
627
632
639
643
649
661
670
681
684
696
Tap (4)
SCFM
1999
1966
1933
1915
1875
1819
1775
1713
1672
1582
Watts
510
520
529
536
540
551
555
567
571
588
Tap (3)-
factory
SCFM
1788
1746
1714
1695
1660
1606
1565
1499
1452
1355
Watts
367
374
389
393
404
422
429
440
449
458
Tap (2)
SCFM
1633
1596
1564
1554
1514
1467
1424
1342
1290
1231
Watts
292
300
311
318
329
343
354
376
382
391
Tap (1)
SCFM
1504
1468
1428
1408
1362
1298
1244
1182
1160
1081
Watts
228
242
250
255
264
279
291
309
318
327
Shaded boxes represent airflow outside the required 300-450cfm/ton.
NOTES:
Airflow based upon cooling performance at 230V with no electric heat and no filter. Airflow at 208V is approximately the
same as 230V because the multi-tap ECM motor is a constant torque motor. The torque doesn’t drop off at the speeds in
which the motor operates.
G2 signal occupies Tap (1) reserved for Ecoer thermostat (EST01) to get even better dehumidification control in cooling.

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This air handler keeps the selected TAP all the way in heating mode, but switches between the selected TAP and
the lowest TAP (1) controlled by G and G2 signal sending from Ecoer thermostat (EST01). G signal will be turned
OFF and G2 signal will be turned ON if the difference between indoor temp. and desired one is < 3F.
Indoor motor has 90 seconds delay after G/G2 inputs are gone no matter it runs cooling or heating.
The air distribution system has the greatest effect on airflow. For this reason, the contractor should use only
industry-recognized procedures to finish ductwork.
Heat pump systems require a specified airflow. Each ton of cooling requires between 300 and 450 cubic feet per
minute (CFM). Duct design and construction should be carefully done. System performance can be lowered
dramatically through bad planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver treated
air along the perimeter of the space. Return air grilles must be properly sized to carry air back to the blower as
well. Failure to follow these may cause abnormal noise and drafts.
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home.
This ensures a comfortable living space. An air velocity meter or airflow hood can give a reading of system CFM.
Temp.
G Signal ON
OFF
ON ON
G2 Signal OFF
TAP selectedinthejobsite
TAP (1)

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6. Ductwork
Field ductwork must comply with the National Fire Protection Association NFPA 90A, NFPA 90B and any
applicable local ordinance.
WARNING
Do not, under any circumstances, connect return ductwork to any other heat producing device such as fireplace
insert, stove, etc. Unauthorized use of such devices may result in fire, carbon monoxide poisoning, explosion,
personal injury or property damage.
Sheet metal ductwork run in unconditioned spaces must be insulated and covered with a vapor barrier. Fibrous
ductwork may be used if constructed and installed in accordance with SMACNA Construction Standard on
Fibrous Glass Ducts. Ductwork must comply with National Fire Protection Association as tested by U/L Standard
181 for Class I Air Ducts. Check local codes for requirements on ductwork and insulation.
• Duct system must be designed within the range of external static pressure the unit is designed to operate
against. It is important that the system airflow be adequate. Make sure supply and return ductwork, grilles,
special filters, accessories, etc. are accounted for in total flow resistance. Refer to the airflow performance
table in this manual.
• Design the duct system in accordance with “ACCA” Manual “D” Design for Residential Winter and Summer
Air Conditioning and Equipment Selection. Latest editions are available from: “ACCA” Air Conditioning
Contractors of America, 1513 16th Street, N.W., Washington, D.C. 20036. If duct system incorporates flexible
air duct, be sure that the pressure drop Information (straight length plus all turns) shown in “ACCA” Manual
“D” is accounted for insystem.
• Supply plenum is attached to the 3/4” duct flanges supplied with the unit. Attach flanges around the blower
outlet.
• Secure the supply and return ductwork to the unit flanges, using proper fasteners for the type of duct used
and tape the duct-to-unit joint as required to prevent air leaks.
IMPORTANT
If an elbow is included in the plenum close to the unit, it must not be smaller than the dimensions of the
supply duct flange on the unit.
The front flange on the return duct connected to the blower casing must not be screwed into the area where
the power wiring is located. Drills or sharp screw points can damage insulation on wires located inside unit.

Manufacturer reserves the right to change specifications or designs without notice.
10.2019
www.ecoer.com
Air Handler Unit Installation Instruction
19/20
7. Pipe Connections
Keep the coil connections sealed until refrigerant connections are made. Refer to condensing unit installation
instructions for details on pipe size and insulation.
• Coil is shipped with Nitrogen. Evacuate the system before charging with refrigerant.
• Make sure the refrigerant pipes layout do not block service access.
• Purge the refrigerant pipes and indoor coil with dry nitrogen while brazing.
• Use a wet rag or an approved heat paste to protect the TXV sensing bulb during the brazing process.
Condensate Drain Connection
1. Use a thin layer of Teflon paste, silicone or Teflon tape when making drain fitting connections.
2. Do not over tighten fittings resulting in splitting pipe connections on the drain pan.
Figure 7-1 Condensate drain trap
• Make sure the drain pipes layout do not block service access. Minimum clearance of 24 inches is required
for filter, coil or blower removal and serviceaccess.
• Ensure the unit is level or pitched slightly toward primary drain connection so that water will drain smoothly
from the pan. All horizontal drain pipes must be pitched downward away from the unit a minimum of 1/8”
per footof line to ensure proper drainage.
• Do not reduce drain pipe size less than connection size provided on condensate drain pan.
• Do not connect condensate drain pipe to a closed or open sewer pipe.
• The drain pipe should be insulated where necessary to prevent sweating and damage due to condensate
forming on the outside surfaceof the line.
• Make provisions for disconnecting and cleaning of the primary drain pipe if it become necessary. Install a 3-
inch trap in the primary drain pipe as close as possible to the unit. Make sure that the top of the trap is below
connection to the drain pan to allow complete drainage of pan.
• Auxiliary drain pipe should be connected to a place where it will be noticeable. Homeowner should be
warned that a problem exists if water begins running from the auxiliary drain pipe.
• Test condensate drain pan and drain pipe after installation is complete. Pour enough water into drain pan,
make sure that the drain pan is draining completely, no leaks are found in drain pipe fittings, and no water is
draining from the termination of theprimary drain pipe.

Manufacturer reserves the right to change specifications or designs without notice.
10.2019
www.ecoer.com
Air Handler Unit Installation Instruction
20/20
8. Air Filter
Filter application and replacement are critical to airflow, which may affect the heating and cooling system
performance. Reduced airflow can shorten the life of the system’s major components, such as motor, heat relays,
evaporator coil or compressor. Units should be sized for a maximum of 300 feet/min. air velocity or what is
recommended for the filter type installed.
Ensure the air flow is in the range of 300~450CFM if adding high efficiency filters or electronic air filtration
systems. Note that the overall performance and efficiency of the unit will be reduced because of pressure drop
by filters.
IMPORTANT
Do not double filter the return air duct.
Do not filter the supply air duct which will change the performance of the unit and reduce airflow .
WARNING
Do not operate the system without filters. A portion of the dust suspended in the air may temporarily lodge in
the duct. Any circulated dust particles could be heated and charred by contact with the air handler elements.
This residue could soil ceilings, walls, drapes, carpets and other articles in the house. Soot damage may occur
without filters in place when certain types of candles, oil lamps or standing pilots are burned.
Air Filter Clean/Replacement
1. Remove bolts to take the filter cover away.
2. Hold the edge of the air filter and extract it out .
3. Clean the air filter or use a new one to replace.
NOTE: AIR FILTER IS NOT FACTORY INSTALLED.
Figure 8-1 Filter installation and clean
Model Number
Dimensions (in.)
Filter Size
W
D
H
A
B
24 / 36
19x20
(19x19)
19-3/4 21 1 16 13-7/8
48 / 60
23x20
23-1/4
21
1
16
15-1/4