Electric Central Furnace - Blower & Relay Installation ...

1 Installation InstructionsElectric Central Furnace - Blower & RelayFor Models E(1,2)E(H,B) SeriesThe p/n 902986 2-wire and p/n 902987 A/C Heat Pump (4 to 7 wire) Relay Boxes install with currentmodels of the E1 and E2 NORDYNE Electric furnaces. The 2-wire Relay Box has control switches thatare operable through an opening in the Furnace InformationRead all instructions carefully before starting the Installation . Specifications or designs are subject tochange or to discontinuance without notice and without incurring Installation may damageequipment, can create a hazard, and willvoid the off electrical supply to the furnaceat the household breaker box to preventelectrical shock which could causepersonal :DANGER:These instructions are primarily intended to assist qualified individuals experienced in the proper Installation of heating and/or airconditioning appliances.

2 Some local codes require licensed Installation /service personnel for this type of equipment. Read all instructionscarefully before starting the Installation .!!2 Table of ContentsPageInstallation .. 3 Blower Selection .. 3 Blower Speed Selection .. 3 System Operation .. 4 Replacement Parts .. 5 System Wiring .. 6 Circuit Board Schematics .. 7 Figure 2. E2E(-) series Electric FurnaceFurnace DoorLow Voltage WiringCircuit BreakersRelay BoxWiring Harness plugshere on FurnaceControl PanelBlowerandRelayWiring HarnessDoor ControlFrame (Usedwith 2-wirerelay box)Connect 8-PinConnector onWiringHarness hereConnect BlowerConnector hereBlower Connector(connect to relaybox)Connect to FurnaceControl PanelConnect toRelay BoxWiring HarnessBlowerandRelayDoor Control Frame(Used with 2-wirerelay box)FurnaceDoorLow Voltage WiringRelay BoxWiring Harness plugshere on FurnaceControl PanelDecorative DoorInsertWiring HarnessCircuit BreakersConnect toRelay BoxConnect toFurnaceControl PanelBlowerConnector(connect torelay box)

3 Connect8-PinConnectoron WiringHarnesshereConnectBlowerConnectorh ereWiring HarnessFigure 1. E1E(-) series Electric FurnaceName Plate Insert3 Installation Sequence for ModelsE(1,2) E(H,B) series Electric Furnace (SeeFigures 1 or 2)Prior to installing a Relay box in the NORDYNE Furnace ,be sure to install the correct A/C system equipment asoutlined on the Furnace options Remove the Furnace door by pulling outward eitherfrom the top or the top side of the door. Switch thecircuit breaker(s) to the OFF position. (See Figure1 or 2 for the circuit breaker location.)Before installing the Relay box remove the blowerand install the cabinet insulation kit for furnacesthat are not factory equipped with this to the instructions supplied with the kit forproper (1,2)EH Models: All E(1,2)EH models require arelay box when adding an air conditioner or (1,2)EB Models: E(1,2)EB models using a 2-wirethermostat require a Relay box (2-wire) when addingan air Selection: See the Furnace InstallationInstructions for the correct air conditioning or heatpump available with the factory installed furnaceblower.

4 Change out the Blower when Remove the cover from the Relay box by removingthe screw from each Speed Selection: HEATING - Move the orange wire on the circuitboard to one of the four quick-connects labeled withheating Blower speeds. COOLING - Move the violet wire on the circuitboard to one of the three quick-connects labeledwith cooling Blower speeds. TWO SPEED Blower - Connect the orange wire(heating) to the L (low) quick-connect for low the violet wire (cooling) to the ML (mediumlow) quick-connect for high speed. FOUR SPEED Blower - See Table 1 for theappropriate speed connections for the E1E(-) andTable 2 for the E2E(-).Reattach the Relay box cover using the two screwspreviously :For the 2-wire Relay box (only after the cover has beenreattached):a.

5 Attach two red caps (provided in plastic bag) to theswitches that stick through the bezel on the sheetmetal cover (see Figure 3, items 7 and 8).Air ConditioningModel Conditioning/Heat Pump Operation (violetwire)-024-030, -036-042, -046,048 Heat Pump Model-018-024, -030-036,-042,-048 FurnaceModel , -012, Relay BoxSpeed Terminal(minimum)-015, -017, -020, -023 Furnace Operation (orange wire)MLMHHR elay BoxSpeed TerminalNOTE: See Furnace Installation instructions for nominalair 1. E1E(-) Heating and Cooling Speed Setting Positions -4 Speed BlowerTable 2. E2E(-) Heating and Cooling Speed Setting Positions -4 Speed BlowerAir Conditioning/Heat Pump Operation (violetwire)SEE Furnace Blower LABEL FORAPPROPRIATE SPEED CONNECTIONSF urnace Operation (orange wire)NOTE: See Furnace Installation instructions for nominalair , -012, -015 Relay BoxSpeed Terminal(minimum)-017, -020, -023 LML4 For E2E(-) Furnace only:b.

6 Attach the appropriate brand label to the sheetmetal cover so that it may be seen through the doorcontrol frame (see Figure 2) in the Furnace doorwhen it is Attach the foam standoff to the bottom corner onthe back side of the Relay box opposite the sidewhere the bracket is attached (See Figure 2A). Thisstandoff will prevent movement of the Relay boxwhen the homeowner adjusts the Box Attachment (See Figures 1 or 2):Attach the mounting bracket to the appropriate sideof the Relay box. Attach the Relay box to the side ofthe Blower the Relay / Blower assembly into the furnaceby sliding it into the Furnace and under the mountingtabs.

7 Secure the Blower in place by using theblower screws previously Box Connection (See Figure 1or 2): Unplug the Blower connector and the thermostatpigtail leads connector from the Furnace controlpanel. Plug the two different 6-circuit connectors on therelay box wiring harness into their correspondinglocations on the Furnace control panel (where theblower and thermostat leads connectors were justremoved). Plug the 8-circuit connector on the other end of thewiring harness into the side of the Relay box. Plug the 6-circuit Blower connector into the bottomof the Relay Voltage Wiring (See Figure 1or 2): Bring inthe low voltage field wires from the thermostat andair conditioning or heat pump unit and attach themto the screw terminals located at the top of the relaybox.

8 See Figure 5 for System Switch the circuit breaker(s) to the ON unit is now ready for Operation For the AC/Heat Pump Relay BoxHeating: Set the Furnace system switch to AUTO, thethermostat system switch to HEAT, and the thermostatfan switch to : Set the Furnace system switch to AUTO, thethermostat system switch to COOL, and the thermostatfan switch to Heat: (Used with a heat pump only.) Setthe Furnace system switch to AUTO, the thermostatsystem switch to EMERGENCY HEAT, and thethermostat fan switch to Air Circulation: Set the thermostat fanswitch to off System: Set the thermostat system switch toOFF and set it to the lowest temperature setting.

9 Set thefurnace system switch to OFF and shut off all power tothe air the 2-Wire Relay BoxHeating: Set the Furnace system switch to AUTO, thetemperature switch (on the Relay box) to HEAT, and thefan switch (on the Relay box) to : Set the Furnace system switch to AUTO, thetemperature switch (on the Relay box) to COOL, and thefan switch (on the Relay box) to Air Circulation: Set the fan switch (on therelay box) to off System: Set the temperature switch (on therelay box) to OFF and set the thermostat to the lowesttemperature setting. Set the Furnace system switch toOFF and shut off all power to the air foam standoff 2A. E2E(-) Electric Furnace with2-wire Relay Box5 Figure 3.

10 2-Wire Relay Box Exploded ViewFigure 4. A/C Heat Pump Relay Box Exploded ViewModel p/n 902986 Blower & Relay Replacement Parts ListModel p/n 90298726541873142356 ITEM #PART #DESCRIPTION902986902987 ITEM #PART #DESCRIPTION9029869029871375950 Cover (2 Wire)14259200 Wire Harness11375951 Cover (AC/HP)15376050 Mounting Bracket, E1112375960 Box, Relay116380790 Mounting Bracket, E21136245672 Wire Relay Circuit Board17669084 Bezel1(includes items 6 & 7)8632278 Switch Cap2624568AC/HP Relay Circuit Board16 Figure 5. System WiringBlowerMotorLMLMHHC123456123456R Y W GA/C Section4 Wire A/C T-Stat8765432187654321 BlowerMotorR C Y O W2 W/E G123456123456 LOWMED-LOMED-HIHIGH240V L1240V L2 Furnace control panelSEQ 1 (W2)24V COM24V HOTSEQ 2 (W2)123456123456 GOPENLMLMHHCF urnace With the AC/Heat Pump Relay Box and a 4 Wire Thermostat123456123456RC RH Y W GA/C Section5 Wire A/C T-Stat87654321 BlowerMotorR C Y O W2 W/E G123456123456 LOWMED-LOMED-HIHIGH240V L1240V L2 Furnace control panelSEQ 1 (W2)24V COM24V HOTSEQ 2 (W2)