Aurora EAS4 Manual
1
IG1554EW 07/12
INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
General
The EA series electric auxiliary heater mounts internally in vertical top and bottom discharge units to provide supplemental and/
or emergency heating capability. On horizontal and rear discharge vertical units, the EA series electric auxiliary heater control box
mounts internally while the electric resistance coil assembly mounts externally. The auxiliary heater uses a control board which
contains the line voltage element control relays. Signals from the main unit control energize the relays in a time-staged sequence.
The auxiliary heater feeds line voltage power to the blower motor and unit transformer to provide emergency heat capability in the
event of an open compressor circuit breaker (caused by a malfunctioning compressor).
Table of Contents
General . . . . . . . . . . . . . . . . . . .1
Installation Steps . . . . . . . . . . . . . 1-6
Auxiliary Heat Ratings . . . . . . . . . . . 7
Energy Monitoring Connections for
Units with Aurora Advances Control . . . . 8
Installation Steps
NOTE: Refer to the unit and auxiliary heat electrical diagrams for connector identification.
1) Examine the auxiliary heater kit for shipping damage. The
EAL(H)15 and EAL(H)20 are supplied with breakers. The
breakers are wrapped in foam and secured in the packaging.
Remove the foam from the breakers and snap the breakers into
the slots provided on the heater frame or control box to secure.
2) Disconnect power supply to unit.
3) Remove blower and compressor section front access panels.
4) Auxiliary heat low voltage control, snip the tie holding the 6-pin
connector to the cabinet in the blower section.
5) For variable speed ECM models, unplug the power connections
to the blower motor. Remove the ground screw and wire from
the blower housing. Leave motor power connected for PSC and
5-speed ECM models.
6) For vertical units (see Figure 1):
a) Remove bolts holding the blower into the cabinet and remove blower assembly from unit.
b) Install auxiliary heat element rack into the unit in place of the blower assembly and replace bolts.
c) Install blower assembly into the auxiliary heat element rack using bolts provided.
7) For horizontal units (see Figure 2):
a) Remove(12)screwsholdingductflangestothecabinet.
b) Installauxiliaryheaterelementrackonunitinplaceofductflanges.
c) Replace (12) screws.
d) Knock out the 2 in. knockout and insert the provided bushing.
e) Run wires through the bushing to the control box.
f) Seal the gap between the wires and bushing with cork tape.
g) Install the cover over the exposed electrical elements.
8) Plug the connector(s) from the element rack, on all EA*H and EAS4 heater kits, into the receptacles (P7 and/or P8) on the
back of the control box. Plugs may be located in either receptacle (see Figure 3). Ensure that connectors are engaged
correctly. When properly connected, the locking tab must be squeezed for disconnection. For horizontal and rear
discharge vertical units, seal hole between elements and air handler compartment.
Figure 1
Instruction Guide:
Auxiliary Heater Installation
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INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Installation Steps cont.
9) All EA*H and EAS4 Heater Kits:
• Install auxiliary heat control box as seen in Figures 2, 4, and 5.
NOTE: Breakers, fuse, or terminal block is always located on the
side opposite from the air coil as shown in Figure 7.
NOTE: Horizontal end discharge, left hand return control box
must be located at bottom of access panel as shown in Figure 2A.
Horizontal side discharge with left hand return, heater element will
be mounted with junction box on bottom side of unit.
10) Models with Variable Speed ECM Motor Only:
• Plug the 6-pin connector (previously detached) into the auxiliary
heat control board. See Figures 8A, 8B, 8C, and 8D.
NOTE: Position the connector so that it is connected to P2 on the
auxiliary heat control board. Use caution when connecting the
connector to the board. The left-most position on the connector
is not attached to any pins protruding from the board. (The
connector on the board has six positions, but only five pins.)
• Proceed to step 12A or 12B.
11) Models with 5-Speed ECM Motor Only:
• Plugthe6-pinconnector(previouslydetached)intotheauxiliaryheat
control board at connection P2. See Figures 8A, 8B, 8C, and 8D.
NOTE: Position the connector so that it is connected to P2 on the
auxiliary heat control board. Use caution when connecting the
connector to the board. The left-most position on the connector
is not attached to any pins protruding from the board. (The
connector on the board has six positions, but only five pins.)
• OnunitsthatdonothavetheAuroracontrols,connectthewhite
and black wires to the screw terminals on the terminal block (TB)
located inside the unit’s control box (Figure 6). The white wire
connects to the W1 terminal and the black wire connects to the C
terminal.
• Proceedtostep14Aor14B.
12A) EA*H and EAS4 Heater Kits with Variable Speed ECM Motor Only:
• IfunithastheAuroraAdvancedControloptiongotostep12C.
• Plugtheexistingblowerpower5-pinconnector(brown,orange
and green wires) into receptacle P9 on the auxiliary heat control
box. The green ground wire on this connector is no longer used
and should be clipped or tied to prevent interference with other
components.
• Plugthe5-pinconnector(blue,violetandgreenwires)hanging
from the auxiliary heat control panel into the variable speed motor
receptacle P11. Connect the green ground wire to the blower
housing using the previously removed screw.
• Reconnectthe16-pinconnectorfromthemaincontrolboardto
the variable speed ECM motor receptacle P12.
• Proceedtostep15.
12B) EAM5, EAM8, EAM10, EAL10, EAL15, and EAL20 with Variable
Speed ECM Motor Only:
• IfunithastheAuroraAdvancedControloptiongotostep12D.
• Plugtheexistingblowerpower5-pinconnector(brown,orangeand
green wires) into receptacle from the auxiliary heat control panel with
the brown, orange, and green wires. The green ground wire from the
original blower power is no longer used and should be clipped or tied to prevent interference with other components.
Air Coil
Figure 2
Air Coil Side
Mounting Screws
Auxiliary Heater Power Wiring
Knockouts (opposite air coil)
Figure 4
Figure 5
From Blower Power
(Brown, Orange, Green)
Coil
Assembly
P8
P7
P9
Figure 3
Figure 2A
Control Box mounts here with EAS4 as well
as all kits for vertical rear discharge cabinets
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INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Installation Steps cont.
• Plugthe5-pinconnector(blue,violetandgreenwires)hangingfromtheauxiliary
heat control panel into the variable speed ECM motor receptacle P11. Connect the
green ground wire to the blower housing using the previously removed screw.
• Reconnectthe16-pinconnectorfromthemaincontrolboardtothevariablespeed
ECM motor receptacle P12.
• Proceedtostep15.
12C) EA*H and EAS4 with Variable Speed ECM Motor and Aurora Advanced Control
Option Only:
• Plugtheexistingblowerpower5-pinconnector(brown,orangeandgreenwires)into
receptacle from the auxiliary heat control panel with the brown, orange, and green
wires. The ground wire from the original blower power is no longer used and should
be clipped or tied to prevent interference with other components.
• Plugthe5-pinconnector(blue,violet,andgreenwires)hangingfromtheauxiliary
heat control panel into the variable speed ECM motor receptacle P11. Connect the
green ground wire to the blower housing using the previously removed screw.
• UnitsthathavetheAuroraAdvancedControloptionareshippedfromthefactorywitha
current transducer already connected to the variable speed ECM blower motor brown
power wire. On these units the brown wire that is routed twice through the current
transducer will need to be replaced with the blue wire that is connected to the auxiliary heat power block. Disconnect the
brown wire from the PB2 power block in the unit’s control box. Route wire into the blower section and remove the current
transducer. Reroute the wire back into the control box and reconnect it back to its original location on the PB2 power
block. Remove the blue wire from the quick connect terminal on the auxiliary heat power block. Route this wire through the
current transducer twice and reconnect it back to its original location on the auxiliary heat power block.
• Reconnectthe16-pinconnectorfromthemaincontrolboardtothevariablespeedECMmotorreceptacleP12.
• ProceedtotheEnergyMonitoringConnectionstableforinstructionsonconnectingtheauxiliaryheatkittotheauxiliary
heat current transducer.
• Proceedtostep15.
12D) EAM5, EAM8, EAM10, EAL10, EAL15 with Variable Speed ECM Motor and Aurora Advanced Control Option Only:
• Plugtheexistingpowerblowerpower5-pinconnector(brown,orangeandgreenwires)intoreceptaclefromthe
auxiliary heat control panel with the brown, orange, and green wires. The ground wire from the original blower power is
no longer used and should be clipped or tied to prevent interference with other components.
• Plugthe5-pinconnector(blue,violet,andgreenwires)hangingfromtheauxiliaryheatcontrolpanelintothevariablespeed
ECM motor receptacle P11. Connect the green ground wire to the blower housing using the previously removed screw.
• UnitsthathavetheAuroraAdvancedControloptionareshippedfromthefactorywithacurrenttransduceralreadyconnected
to the variable speed ECM blower motor brown power wire. On these units the brown wire that is routed twice through the
Current Transducer will need to be replaced with the blue wire that is connected to the auxiliary heat power block. Disconnect
the brown wire from the PB2 power block in the unit’s control box. Route wire into the blower section and remove the current
transducer. Reroute the wire back into the control box and reconnect it back to its original location on the PB2 power block.
Remove the blue wire from the quick connect terminal on the auxiliary heat power block. Route this wire through the current
transducer twice and reconnect it back to its original location on the auxiliary heat power block.
• Reconnectthe16-pinconnectorfromthemaincontrolboardtothevariablespeedECMmotorreceptacleP12.
• ProceedtotheEnergyMonitoringConnectionstableforinstructionsonconnectingtheauxiliaryheatkittotheauxiliary
heat current transducer.
• Proceedtostep15.
13A) EA*H and EAS4 Heater Kits with PSC Motor Only:
• ForPSCmotors,removethesafetyplugfromtheorangeandbrownblowerpowerwires5-pinconnector,(leavewhite
and black wires connected to PSC motor) then plug the orange and brown blower power wire 5-pin connector into
receptacle P9 on the auxiliary heat control box. The green ground wire on this connector is no longer used and should
be clipped or tied to prevent interfering with other components.
• Theotherendoftheorangeandbrownblowerpowerwire5-pinconnectorshouldbeconnectedtothepowerstrip
(PS) located inside the unit’s control box (Figure 6) as shown in the unit schematic. On some models these wires are
connected at the factory.
• Insertthesafetyplugintotheblueandpurplewire5-pinconnectorhangingfromtheauxiliaryheatcontrolboxsincethis
connector will not be used.
• Tieoffallwiressothattheydonotinterferewithanyothercomponents.
Figure 6
CC
PS
3 1 2
TB
L2 L1
Line Voltage
Ground
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INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Installation Steps cont.
• IfunithastheAuroraAdvancedControloption,proceedtotheEnergyMonitoringConnectionstable,forinstructionson
connecting the auxiliary heat kit to the auxiliary heat current transducer.
• Proceedtostep15.
13B) EAM5, EAM8, EAM10, EAL10, EAL15, and EAL20 with PSC Motor Only:
• ForPSCmotors,removethesafetyplugfromtheorangeandbrownblowerpowerwires5-pinconnector,(leavewhite
and black wires connected to PSC motor) then plug the orange and brown blower power wire 5-pin connector into the
receptacle from the auxiliary heat control panel. The green ground wire on this connector is no longer used and should
be clipped or tied to prevent interfering with other components.
• Theotherendoftheorangeandbrownblowerpowerwire5-pinconnectorshouldbeconnectedtothepowerstrip
(PS) located inside the unit’s control box (Figure 6) as shown in the unit schematic. On some models these wires are
connected at the factory.
• Insertthesafetyplugintotheblueandpurplewire5-pinconnectorhangingfromtheauxiliaryheatcontrolpanelsince
this connector will not be used.
• Tieoffallwiressothattheydonotinterferewithanyothercomponents.
• IfunithastheAuroraAdvancedControloption,proceedtotheEnergyMonitoringConnectionstable,forinstructionson
connecting the auxiliary heat kit to the auxiliary heat current transducer.
• Proceedtostep15.
14A) EA*H and EAS4 Heater Kits with 5-Speed ECM Motor Only:
• For 5-speed ECM motors connect the orange and brown blower power wires to the power strip (PS) located inside the
unit’s control box as shown in the unit’s schematic.
• Removesafetyplugfromexistingblowerpower5-pinconnector,thenplugtheblowerpower5-pinconnectorinto
receptacle P9 on the auxiliary heat control box. The green ground wire on this connector is no longer used and should
be clipped or tied to prevent interfering with other components.
• Insertthesafetyplugintotheblueandpurplewire5-pinconnectorhangingfromtheauxiliaryheatcontrolpanelsince
this connector will not be used.
• Tieoffanywirethatinterfereswithbloweroperation.
• IfunithastheAuroraAdvancedControloption,proceedtotheEnergyMonitoringConnectionstable,forinstructionson
connecting the auxiliary heat kit to the auxiliary heat current transducer.
• Proceedtostep15.
14B) EAM5, EAM8, EAM10, EAL10, EAL15, and EAL20 with 5-speed ECM Motor Only:
• For 5-speed ECM motors connect the orange and brown blower power wires supplied with the unit to the power strip
(PS) located inside the unit’s control panel as shown in the unit’s schematic.
• Removesafetyplugfromexistingblowerpower5-pinconnector,thenplugtheblowerpower5-pinconnectorinto
receptacle from the auxiliary heat control panel with the brown, orange, and green wires. The green ground wire on this
connector is no longer used and should be clipped or tied to prevent interfering with other components.
• Insertsafetyplugintothe5-pinconnector(blue,purple,andgreenwires)hangingfromtheauxiliaryheatcontrolpanel.
• Tieoffanywirethatinterfereswithbloweroperation.
• IfunithastheAuroraAdvancedControloption,proceedtotheEnergyMonitoringConnectionstable,forinstructionson
connecting the auxiliary heat kit to the auxiliary heat current transducer.
• Proceedtostep15.
IMPORTANT: Remove the black/white and gray/white jumper wires routed from the contactor (CC) to the power
strip (PS) in the main control box.
15) Check to ensure that the blower high speed setting is above the minimum CFM required for the heater (see Table 8). Wire
tie all leads away from blower inlet and rough edges. On vertical bottom discharge units, make sure wires are equipped with
a drip loop to prevent condensation from running down to motor or element connectors.
16) Units with the three operating modes of forced air heating/cooling/hydronic heating with 15 and 20 kW electric heat option,
line jumpers need to be placed on the auxiliary heat board terminal block P1 from 1 to 3 and 2 to 4. This is necessary since
this product line only allows two stages of electric heat. The first stage will have 10 kW of electric heat, and with second
stage will produce a total of either 15 or 20 kW of electric heat depending on which model of electric heat is installed. Other
product lines have no staging at all and others allow up to four stages of electric heat at 5 kW intervals and line jumpers are
not necessary.
17) Connect power to the auxiliary heat control box (one or two circuits as per Table 9). When single source power is required,
jumper bar assembly (part number 19P592-01) should be used on electric heat kits supplied with breakers.
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INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Figure 8B
Figure 8C
Figure 8D
EALH15, EALH20
EAS4, EASH4, EAMH5, EAMH8, EAMH10
Figure 8A
Figure 7
Auxiliary Heat
Control Box
Main Control Box
Auxiliary Heater
Control Board
Te rminal or
Fuse Block
Auxiliary Heat
Power Supply
Auxiliary heat control box installation in vertical rear discharge cabinets as well as for EAS4 heater kit.
All other auxiliary heater kits used on vertical top discharge cabinets have the auxiliary heat controls
mounted on the heater frame and do not require auxiliary heat control box installation.
Top Discharge Rear Discharge
EAS4
Auxiliary Heat
Control Box
Main Control Box
Auxiliary Heater
Control Board
Te rminal or
Fuse Block
Auxiliary Heat
Power Supply
EAL15, EAL20NOTE: Controls are mounted on auxiliary heater frame.
EAM5, EAM8 EAM10, EAL10NOTE: Controls are mounted on auxiliary heater frame.
GND. GND.
ON
OFF
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
ON
OFF
GND.
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
GND.GND.
L1 L2
ON
OFF
ON
OFF
L1 L2
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
L1 L2L1 L2
L1 L2
GND.
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
C
1
2
3
4
C
1
2
3
4
C
1
2
3
4
C
1
2
3
4
L1 L2
P7 P8
P7 P8
Installation Steps cont.
18) Verify DIP switch settings on unit control board are set correctly.
19) Turn on power supplies to the unit and auxiliary heater.
20) Test run the unit in “Emergency Heat” mode and check operation of the auxiliary heater (with access panels removed).
Air discharge temperatures should increase with each stage accordingly (each emergency stage should increase every 2
minutes, each auxiliary stage should increase every 5 minutes). NOTE: Some products do not allow auxiliary heat staging.
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IG1554EW 07/12
INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Figure 8B
Figure 8C
Figure 8D
EALH15, EALH20
EAS4, EASH4, EAMH5, EAMH8, EAMH10
Figure 8A
Figure 7
Auxiliary Heat
Control Box
Main Control Box
Auxiliary Heater
Control Board
Te rminal or
Fuse Block
Auxiliary Heat
Power Supply
Auxiliary heat control box installation in vertical rear discharge cabinets as well as for EAS4 heater kit.
All other auxiliary heater kits used on vertical top discharge cabinets have the auxiliary heat controls
mounted on the heater frame and do not require auxiliary heat control box installation.
Top Discharge Rear Discharge
EAS4
Auxiliary Heat
Control Box
Main Control Box
Auxiliary Heater
Control Board
Te rminal or
Fuse Block
Auxiliary Heat
Power Supply
EAL15, EAL20NOTE: Controls are mounted on auxiliary heater frame.
EAM5, EAM8 EAM10, EAL10NOTE: Controls are mounted on auxiliary heater frame.
GND. GND.
ON
OFF
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
ON
OFF
GND.
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
GND.GND.
L1 L2
ON
OFF
ON
OFF
L1 L2
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
L1 L2L1 L2
L1 L2
GND.
K1 K2 K3 K4
JW1
JW3
JW2
JW4
JW6
JW7
P2P1
C
1
2
3
4
C
1
2
3
4
C
1
2
3
4
C
1
2
3
4
L1 L2
P7 P8
P7 P8
Installation Steps cont.
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INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Auxiliary Heat Ratings
Table 8
Table 10
MODEL KW STAGES BTU/HR MIN
CFM
208V 240V 208V 240V
EAS(H)4 2.93.8 1 9,700 12,900 250
EAM(H)5 3.64.8 1 12,300 16,300 450
EAM(H)8 5.77.6 2 19,400 25,900 550
EAM(H)10 7.29.6 2 24,600 32,700 650
EAL(H)10 7.29.6 2 24,600 32,7001100
EAL(H)15 10.8 14.4336,900 49,100 1250
EAL(H)15-3 10.8 14.4336,900 49,100 1250
EAL(H)20 14.4 19.2449,200 65,500 1500
NOTES: High fan tap setting must be above the minimum CFM for the heater selected.
Model numbers indicate horizontal/rear discharge and vertical units.
Example: EAS4=vertical unit; EASH4=horizontal/rear discharge unit.
Table 9
MODEL KW STAGES BTU/HR MIN
CFM
N, G, R, and T SERIES COMPATIBILITY
208V 230V 208V 230V
EAM(H)5 3.64.8 1 12,300 16,300 450
EAM(H)8 5.77.6 2 19,400 25,900 550
EAM(H)10 7.29.6 2 24,600 32,700 650
EAL(H)10 0011007,23006,4226.92.7
EAL(H)15 0521001,94009,6334.418.01
EAL(H)20 0051005,56002,9442.914.41
11/23/06
NOTES: High fan tap setting must be above the minimum CFM for the heater selected.
Model numbers indicate horizontal and vertical units.
Example: EAL10=vertical unit; EALH10=horizontal units or vertical rear discharge if available.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
022 026 - 030 036 - 042 048 - 072
L and Y SERIES COMPATIBILITY
024 - 035 042 048 - 070
MODEL KW STAGES BTU/HR MIN
CFM
S and Q SERIES COMPATIBILITY
208V 230V 208V 230V
EAL(H)10
0011007,23006,4226.92.7
EAL(H)15
0521001,94009,6334.418.01
EAL(H)20
0051005,56002,9442.914.41
•
•
•
•
•
•
•
•
•
••
038 049 064 072
NOTES: High fan tap setting must be above the minimum CFM for the heater selected.
Model numbers indicate horizontal and vertical units.
Example: EAL10=vertical unit; EALH10=horizontal units or vertical rear discharge if available.
Model Supply
Circuit
Heater Amps Min Circuit Amp Fuse (USA) Fuse (CAN) CKT BRK
208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V
EAS(H)4 Single 13.7 15.8 17.9 20.5 20 20 20 20 20 20
EAM(H)5 Single 17.3 20.0 26.7 30.0 30 30 30 30 30 30
EAM(H)8 Single 27.5 31.7 39.3 44.6 40 45 40 45 40 45
EAM(H)10 Single 34.7 40.0 48.3 55.0 50 60 50 60 50 60
EAL(H)10 Single 34.7 40.0 53.3 60.0 60 60 60 60 60 60
EAL(H)15
Single 52.0 60.0 75.0 85.0 80 90 80 90 70 100
L1/L2 34.7 40.0 53.3 60.0 60 60 60 60 60 60
L3/L4 17.3 20.0 21.7 25.0 25 25 25 25 20 30
EAL(H)20
Single 69.3 80.0 96.7 110.0 100 110 100 110 100 100
L1/L2 34.7 40.0 53.3 60.0 60 60 60 60 60 60
L3/L4 34.7 40.0 43.3 50.0 45 50 45 50 40 50
5/3/11
All heaters rated single phase 60 cycle and include unit blower load.
All fuses type “D” time delay (or HACR circuit breaker in USA)
Supply wire size to be determined by local codes.
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IG1554EW 07/12
INSTRUCTION GUIDE: AUXILIARY HEATER INSTALLATION
Energy Monitoring Connections for Units with Aurora Advanced Control Option
EAS(H)4
EAM(H)5
Remove the GRAY wire from the quick connect terminal on the L2 side of the auxiliary heat supply power block. Route wire through the inside of the
current transducer and connect it back to it’s original location on the power block
EAM(H)8
EAM(H)10
EAL(H)10
Remove the GRAY and BLACK wires from the quick connect terminals on the L2 side of the auxiliary heat supply power block. Route both wires
through the inside of the current transducer and connect them back to their original location on the power block
EAL(H)15*
Remove the GRAY and BLACK wires from the quick connect terminals on the L2 side of the auxiliary heat power block that is supplied by the
BLACK wire from the L2 side of the 60 amp breaker. Route both wires through the inside of the current transducer and connect them back to their
original location on the power block. Then remove the YELLOW wire from the NO connection on the K3 relay that is located on the auxiliary heat
circuit board. Route this wire, along with the previously routed GRAY and BLACK wires, through the center of the current transducer and connect it
back to its original location on the circuit board.
EAL(H)20*
Remove the GRAY and BLACK wires from the quick connect terminals on the L2 side of the auxiliary heat power block that is supplied by the
BLACK wire from the L2 side of the 60 amp breaker. Route both wires through the inside of the current transducer and connect them back to their
original location on the power block. Then remove the YELLOW wire from the NO connection on the K3 relay and the PINK wire from the NO
connection on the K4 relay that are located on the auxiliary heat circuit board. Route both of these wires, along with the previously routed GRAY and
BLACK wires, through the center of the current transducer and connect them back to their original location on the circuit board.
* If two separate circuits are used to supply power to the auxiliary heat kit, the Installer will need to verify that each leg of the auxiliary heat circuit breakers are wired
from the power supply correctly in order for the current transducer to operate properly. This can be done by measuring the supply side voltage of the auxiliary heat
circuit breakers. Put a voltmeter on the L2 side of Circuit Breaker One and on the L2 side of Circuit Breaker Two. The voltmeter should read approximately 0 volts.
If the meter reads high voltage, the auxiliary heat breakers need to be rewired so that breakers in the auxiliary heat kit match the wiring of the Disconnect Panel
breakers. Meaning, L1 from one breaker in the disconnect panel must connect to L1 at one of the auxiliary heat circuit breakers and L1 from the other breaker in the
disconnect panel must connect to L1 of the other auxiliary heat circuit breaker, and L2 from both breakers in the disconnect panel must connect to L2 at both auxiliary
heat breakers.
NOTE: Units that have the Aurora Advanced Control option are shipped from the factory with a current transducer already connected to one of the blower motor power
wires. If the blower motor in the unit is a variable speed or 5-speed ECM, an extra step is needed to ensure that the Energy Monitoring feature will work properly.
On units that have the Aurora Advanced Control option and a variable speed or 5-speed ECM blower motor, the brown wire that is routed twice through the current
transducer will need to be replaced with the blue wire that is connected to the auxiliary heat power block. Disconnect the brown blower power wire from the PB2 power
block in the units control box. Route wire into the blower section and remove the current transducer. Reconnect the brown wire to the PB2 power block in the unit’s
control box. Remove the blue wire from the quick connect terminal on the auxiliary heat power block. Route this wire through the current transducer center twice and
reconnect it back to its original location on the auxiliary heat power block.
©2012Themanufacturerhasapolicyofcontinualproductresearchanddevelopmentandreservestherighttochangedesignandspecicationswithoutnotice.
This manual suits for next models
15
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