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0650329-56 / 506265-03

Issue 1924

Page 1 of 13

Save these instructions for future reference

INSTALLATION INSTRUCTIONS

EFV Electric Furnace

Warm Air Unit

 

(P) 506265-03

*P506265-03*

Manufactured By

Allied Air Enterprises LLC

A Lennox International, Inc. Company

215 Metropolitan Drive

West Columbia, SC 29170 

This manual must be left with the homeowner for future reference.

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in 

manuals, be alert to the potential for personal injury or death.

Table of Contents

Installation ...................................................................2

Condensate Drain Connection ....................................4

Electrical Wiring ...........................................................5

Setup ...........................................................................6

Sequence of Operation................................................8

System Check .............................................................9

Replacement Parts ....................................................10

Maintenance ..............................................................10

Airflow Configurations

................................................11

Improper installation, adjustment, service, or 

maintenance can cause injury or property damage. 

Refer to this manual. For assistance or additional 

information,  consult  a  qualified  installer  or  service 

agency.

 WARNING

The information contained in this manual is intended 

for  use  by  qualified  service  technicians  familiar  with 

safety procedures and equipped with the proper tools 

and test instruments. Failure to carefully read and follow 

all instructions in this manual can result in equipment 

malfunction, property damage, personal injury, and/or 

death.

 WARNING

Disconnect  all  power  supplies  to  both  the  indoor 

blower section and outdoor section before making any 

electrical connections or servicing the system. More 

than  one  disconnect  switch  may  be  required  to  de-

energize the equipment. Hazardous voltage can cause 

severe personal injury or death.

 WARNING

Inspection of Shipment

Upon receipt of equipment, carefully inspect it for possible 

shipping damage. If damage is found, it should be noted 

on the carrier’s freight bill. Take special care to examine 

the unit inside the carton if the carton is damaged. Any 

concealed damage discovered should be reported to the 

last carrier immediately, preferably in writing, and should 

include a request for inspection by the carrier’s agent.

If any damages are discovered and reported to the carrier 

DO NOT INSTALL THE UNIT

, as claim may be denied.

Check the unit rating plate to confirm specifications are as 

ordered.

Summary of Contents for Allied Air EFV Series

Page 1: ...ded for use by qualified service technicians familiar with safety procedures and equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury and or death WARNING Disconnect all power supplies to both the indoor blower section and outdoor section before making any electri...

Page 2: ... rating plate for specific information These electric furnaces are completely factory assembled and all components are performance tested Each unit consists of a blower assembly optional refrigerant coil and controls in an insulated galvanized factory finished enclosure and may also include electric heat as specified Knockouts are provided for electrical power wiring entrance When used on cooling ...

Page 3: ... blower 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 Non Ducted Return Closet Installation The cabinet can be installed in a closet with a false bottom to form a return air plenum or be installed with a return air plenum under the unit Louvers or return air grilles are field supplied Local codes may limit a...

Page 4: ... codes before connecting drain line to an existing drainage system Insulate drain lines where sweating could cause water damage The removal of cabinet knockouts required for drain connections can be made much easier with the indoor coil assembly removed from the cabinet Install drain lines so they do not block service access to front of unit A 24 clearance is required for filter coil or blower rem...

Page 5: ... 240 volt single phase 60 cycle AC power supply The units are internally factory wired for 240 volt installation If 208 volt installation is desired it will be necessary to change the black transformer lead in the blower cabinet control box to the 208V terminal on the transformer The variable speed motor in the EFV electric furnace contains DC filter capacitors that will cause a surge or inrush of...

Page 6: ...t the O wire to the 24 volt R wire The motor control board that provides airflow selection also features LED indicators that display operating mode humidity control and airflow CFM In addition thermostat signals for emergency heat EM aux heat W1 reversing valve O compressor stage 1 Y1 compressor stage 2 Y2 and blower G are all indicated by lit LED s on this board If a humidistat is used the dehumi...

Page 7: ...00 Emer Heat X X 1600 1400 1200 1100 EFV20DCP Cont Blower X 900 800 700 600 Cooling X X 1800 1600 1400 1200 Heating X 1800 1600 1400 1200 Aux Heat X X 1800 1600 1400 1200 Emer Heat X X 1800 1600 1400 1200 This CFM is not approved for use with highest kW heater size Humidistat will reduce cooling airflow by 10 in high humidity Air flow is greater of COOL and HEAT when both electric heat and heat pu...

Page 8: ...g elements and the indoor blower motor come on Units with a second heat sequencer can be connected with the first sequencer to W on the thermostat sub base or connected to a second stage on the sub base Heating heat pump When the thermostat calls for heat the circuits between R and Y and R and G are completed Circuit R Y energizes the contactor starting the outdoor fan motor and the compressor Cir...

Page 9: ...Is the unit circuit breaker s rotated properly ON up OFF down Are all access panels in place and secure Refer to outdoor unit installation instructions for system start up instructions and refrigerant charging instructions Airflow For proper system operation the airflow through the indoor coil should be between 350 450 CFM per ton of cooling capacity Each electric furnace is shipped configured to ...

Page 10: ...nd dust IMPORTANT See unit position figures for location of filter in unit cabinet and service panel giving access to unit filter Inspect air filters at least once a month and replace or clean as required Dirty filters are the most common cause of inadequate heating or cooling performance Replace disposable filters Washable filters can be cleaned by soaking in mild detergent and rinsing with cold ...

Page 11: ...0650329 56 506265 03 Issue 1924 Page 11 of 13 Airflow Configurations Left to Right Airflow Right to Left Airflow Upflow Counterflow Horizontal Figure 3 Airflow Configurations ...

Page 12: ...0650329 56 506265 03 Issue 1924 Page 12 of 13 Figure 4 Wiring Diagram Variable Speed Blower ...

Page 13: ...Air Conditioning with or without Electric Heat Electric Furnace Thermostat Air Condensing Unit R R O C C1 C W2 EM W1 W1 Y2 Y2 Y1 Y1 Y1 G G 2nd Stage Electric Heat if used 1st Stage Electric Heat if used 2 Stage System only for single stage systems jumper Y1 to Y2 Connect O to R for proper cooling blower delay Y Y2 Heat Only Electric Furnace Thermostat R R C C1 W2 EM W1 W1 G G 2nd Stage Electric He...

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