Armstrong EFC08 Installation And Maintenance Instructions Manual Download | Manualshive

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Page 14

# 44876D006

Figure 5

Low Voltage Connections

(PSC Motor)

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Summary of Contents for EFC08

Page 1: ...LATION 2 SETUP PROCEDURE 6 SEQUENCE OF OPERATION 8 SYSTEM CHECK 9 REPLACEMENT PARTS 10 MAINTENANCE 10 AIRFLOW CONFIGURATIONS 11 WIRING DIAGRAMS 12 WARRANTY 15 44876D006 The information contained in this manual is intended for use by qualified service techni cians familiar with safety procedures and equipped with the proper tools and test in struments Failure to carefully read and follow all instru...

Page 2: ...s 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 applications excessive sweating may occur when unit is instal...

Page 3: ... the unit Louvers or return air grilles are field supplied Local codes may limit application of sys tems without a ducted return to single story buildings Install louvers in a closet Use the free area of louver or grille to determine the size opening required to provide the free area for metal louvers or grilles If the free area is not known assume a 25 free area for wood or a 75 free area for met...

Page 4: ...equire an oversized drain line to eliminate air trapping Route to the outside or to an appropriate drain Check local 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...

Page 5: ...T The variable speed motor in the EFV electric furnace contains DC filter capacitors that will cause a surge or inrush of current when power is applied Power is to remain applied to the motor except during servicing Remove AC power before plugging or unplugging the input power to the motor Do not install blower relays that interrupt line voltage to the motor Electrical Wiring Turn off electric pow...

Page 6: ...control board in the blower control box Set the HEAT and COOL CFM taps by moving the board jumpers to the A B C or D positions see Figure 2 based on the information found in the Application Table on page 11 The ADJUST tap on the control board can be used to raise or lower the table CFM s The tap will raise the table CFM by 10 and the tap will lower the table CFM by 12 IMPORTANT When changing the c...

Page 7: ...raight air conditioning system connect 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 boa...

Page 8: ... 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 Circuit R and G e...

Page 9: ...t 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 config ured to provide t...

Page 10: ...ements motor blower relay control transformer blower wheel indoor coil and sheet metal parts When ordering replacement parts it is necessary to order by part number and include with the order the complete model number and serial number see unit data plate Refer to the parts list for unit component part numbers Owner Record Furnace Model ____________________ Serial _____________________Installation...

Page 11: ... 44876D006 Page 11 AIRFLOW CONFIGURATIONS Left to Right Airflow Right to Left Airflow Upflow Counterflow Horizontal ...

Page 12: ...20V OR 220V 24 C TR 18 RED 18 BLU W2 W1 C G R BLK WHT BLU GRN RED TD H 3 1 2 5 H 18 RED 18 BLU 18 GRN 18 WHT 18 BLK GND BRN WHT BRN CAP L1 L2 OR NEUT WHT IF 120V BLU RED BLK YEL 4 3 2 1 BR 4 6 2 3 1 5 14 BLU MED 14 RED LO 14 BLK HI 14 YEL COM 14 BLK 18 BLU 14 RED 18 BLU 18 GRN 14 BLK 18 BLU 14 YEL 24OV 14 WHT 12OV 14 GRN TO THERMOSTAT BY OTHERS 14 BLK L1 14 YEL L2 1 2 3 4 5 6 6 5 4 3 2 1 TO BLOWER...

Page 13: ... 44876D006 Page 13 Figure 4 Wiring Diagram Variable Speed Blower MTR ...

Page 14: ...Page 14 44876D006 Figure 5 Low Voltage Connections PSC Motor ...

Page 15: ...r to assume for it any further obligation in connection with the warranted product What is NOT Covered 1 Cabinets or cabinet pieces 2 Normal maintenance items such as filters fan belts fuses or other consumable items 3 Damage caused by misuse failure to maintain properly accidents or acts of God 4 External wiring piping venting or attachment of accessory products not integral to our product includ...

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