electric central furnace - blower & relay installation...
TRANSCRIPT
Installation InstructionsElectric Central Furnace - Blower & Relay
For Models E(1,2)E(H,B) Series
The 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 door.
Important Information
Read all instructions carefully before starting the installation. Specifications or designs are subject tochange or to discontinuance without notice and without incurring obligations.
Improper installation may damageequipment, can create a hazard, and willvoid the warranty.
Shut off electrical supply to the furnaceat the household breaker box to preventelectrical shock which could causepersonal injury.
WARNING: DANGER:
These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and/or airconditioning appliances. Some local codes require licensed installation/service personnel for this type of equipment. Read all instructionscarefully before starting the installation.
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Table of ContentsPage
Installation ..................................................................................................................................................................... 3Blower Selection ............................................................................................................................................................ 3Blower Speed Selection ......................................................................................................... ....................................... 3System Operation .......................................................................................................................................................... 4Replacement Parts ........................................................................................................................................................ 5System Wiring ............................................................................................................................................................... 6Circuit Board Schematics .............................................................................................................................................. 7
Figure 2. E2E(-) Series Electric Furnace
Furnace Door
Low Voltage Wiring
Circuit Breakers
Relay BoxWiring Harness plugshere on FurnaceControl Panel
Blower
and
Relay
Wiring Harness
Door ControlFrame (Usedwith 2-wirerelay box)
Connect 8-PinConnector onWiringHarness here
Connect BlowerConnector here
Blower Connector(connect to relaybox)
Connect to FurnaceControl Panel
Connect toRelay Box
Wiring Harness
Blower
and
Relay
Door Control Frame(Used with 2-wire
relay box)FurnaceDoor
Low Voltage Wiring
Relay BoxWiring Harness plugshere on FurnaceControl Panel
Decorative DoorInsert
Wiring Harness
Circuit Breakers
Connect toRelay Box
Connect toFurnace
Control Panel
BlowerConnector(connect torelay box)
Connect8-PinConnectoron WiringHarnesshere
ConnectBlowerConnectorhere
Wiring Harness
Figure 1. E1E(-) Series Electric Furnace
Name Plate Insert
3
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 label.
1. 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 package.Refer to the instructions supplied with the kit forproper installation.
2. E(1,2)EH Models: All E(1,2)EH models require arelay box when adding an air conditioner or heatpump.
E(1,2)EB Models: E(1,2)EB models using a 2-wirethermostat require a relay box (2-wire) when addingan air conditioner.
Blower Selection: See the furnace InstallationInstructions for the correct air conditioning or heatpump available with the factory installed furnaceblower. Change out the blower when needed.
3. Remove the cover from the relay box by removingthe screw from each side.
Blower 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 speed.Connect 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 removed.
IMPORTANT:For the 2-wire relay box (only after the cover has beenreattached):a. Attach two red caps (provided in plastic bag) to the
switches that stick through the bezel on the sheetmetal cover (see Figure 3, items 7 and 8).
Air ConditioningModel No.
Air Conditioning/Heat Pump Operation (violetwire)
-024 -030, -036-042, -046,
048
Heat Pump Model -018 -024, -030 -036,-042,-048
FurnaceModel No. -010, -012,
Relay BoxSpeed Terminal
(minimum)
-015, -017, -020, -023
Furnace Operation (orange wire)
ML MH HRelay BoxSpeed TerminalNOTE: See furnace installation instructions for nominal
air deliveries.
Table 1. E1E(-) Heating and Cooling Speed Setting Positions -4 Speed Blower
Table 2. E2E(-) Heating and Cooling Speed Setting Positions -4 Speed Blower
Air Conditioning/Heat Pump Operation (violetwire)
SEE FURNACE BLOWER LABEL FORAPPROPRIATE SPEED CONNECTIONS
Furnace Operation (orange wire)
NOTE: See furnace installation instructions for nominalair deliveries.
L ML
FurnaceModel No. -010, -012, -015
Relay BoxSpeed Terminal
(minimum)
-017, -020, -023
L ML
4
For E2E(-) furnace only:b. Attach the appropriate brand label to the sheet
metal cover so that it may be seen through the doorcontrol frame (see Figure 2) in the furnace doorwhen it is replaced.
c. 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 switches.
4. Relay 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 housing.
Insert the relay/blower assembly into the furnaceby sliding it into the furnace and under the mountingtabs. Secure the blower in place by using theblower screws previously removed.
5. Relay 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 box.
6. Low 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. See Figure 5 for System Wiring.
7. Switch the circuit breaker(s) to the ON position.The unit is now ready for operation.
System Operation —
For the AC/Heat Pump Relay Box
Heating: Set the furnace system switch to AUTO, thethermostat system switch to HEAT, and the thermostatfan switch to AUTO.
Cooling: Set the furnace system switch to AUTO, thethermostat system switch to COOL, and the thermostatfan switch to AUTO.
Emergency Heat: (Used with a heat pump only.) Setthe furnace system switch to AUTO, the thermostatsystem switch to EMERGENCY HEAT, and thethermostat fan switch to AUTO.
Continuous Air Circulation: Set the thermostat fanswitch to ON.
Shut off System: Set the thermostat system switch toOFF and set it to the lowest temperature setting. Set thefurnace system switch to OFF and shut off all power tothe air conditioner.
For the 2-Wire Relay Box
Heating: Set the furnace system switch to AUTO, thetemperature switch (on the relay box) to HEAT, and thefan switch (on the relay box) to AUTO.
Cooling: Set the furnace system switch to AUTO, thetemperature switch (on the relay box) to COOL, and thefan switch (on the relay box) to AUTO.
Continuous Air Circulation: Set the fan switch (on therelay box) to ON.
Shut 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 conditioner.
Attach foam “standoff” here.
Figure 2A. E2E(-) Electric Furnace with2-wire Relay Box
5
Figure 3. 2-Wire Relay Box Exploded View
Figure 4. A/C Heat Pump Relay Box Exploded View
Model p/n 902986
Blower & Relay Replacement Parts List
Model p/n 902987
2
6
5
4
1
8
7
3
1
4
2
3
5
6
ITEM # PART # DESCRIPTION 902986 902987 ITEM # PART # DESCRIPTION 902986 9029871 375950 Cover (2 Wire) 1 4 259200 Wire Harness 1 1
375951 Cover (AC/HP) 1 5 376050 Mounting Bracket, E1 1 12 375960 Box, Relay 1 1 6 380790 Mounting Bracket, E2 1 13 624567 2 Wire Relay Circuit Board 1 7 669084 Bezel 1
(includes items 6 & 7) 8 632278 Switch Cap 2624568 AC/HP Relay Circuit Board 1
6
Figure 5. System Wiring
Blo
wer
Mo
tor
LMLM
HH
C
12
34
56
12
34
56
R
Y
W
G
A/C
O.D
. Sec
tio
n4
Wir
e A
/C
T-S
tat
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
Blo
wer
Mo
tor
R
C
Y
O
W2
W/E
G
1 2 3 4 5 61 2 3 4 5 6
LO
WM
ED
-LO
ME
D-H
IH
IGH
240V
L1
240V
L2
Fu
rnac
e co
ntr
ol p
anel
SE
Q 1
(W
2)
24V
CO
M24
V H
OT
SE
Q 2
(W
2)
1 2 3 4 5 6
1 2 3 4 5 6
GO
PE
N
LMLM
HH
C
Fu
rnac
e W
ith
th
e A
C/H
eat
Pu
mp
R
elay
Box
an
d a
4 W
ire
Th
erm
ost
at
12
34
56
12
34
56
RC
RH
Y W
G
A/C
O.D
. Sec
tio
n5
Wir
e A
/C
T-S
tat
8 7 6 5 4 3 2 1
Blo
wer
Mo
tor
R
C
Y
O
W2
W/E
G
1 2 3 4 5 6
1 2 3 4 5 6
LO
WM
ED
-LO
ME
D-H
IH
IGH
240V
L1
240V
L2
Fu
rnac
e co
ntr
ol p
anel
SE
Q 1
(W
2)
24V
CO
M24
V H
OT
SE
Q 2
(W
2)1 2 3 4 5 6
1 2 3 4 5 6
GO
PE
N
LMLM
HH
C
Fu
rnac
e W
ith
th
e A
C/H
eat
Pu
mp
R
elay
Box
an
d a
5 W
ire
Th
erm
ost
at
12
34
56
12
34
56
R
W
A/C
O.D
. Sec
tio
n2
Wir
e H
eat
O
nly
T-S
tat
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
Y
R
C
W
1 2 3 4 5 6
1 2 3 4 5 6
LO
WM
ED
-LO
ME
D-H
IH
IGH
240V
L1
240V
L2
Fu
rnac
e co
ntr
ol p
anel
SE
Q 1
(W
2)
24V
CO
M24
V H
OT
SE
Q 2
(W
2)
1 2 3 4 5 6
1 2 3 4 5 6
GO
PE
N
Fu
rnac
e W
ith
th
e 2
Wir
e R
elay
B
ox a
nd
a 2
Wir
e T
her
mo
statH
EA
T
CO
OL
OF
FO
N
AU
TO
FAN
12
34
56
12
34
56
H/P
O.D
. Sec
tio
nH
/PT-
Sta
t
Blo
wer
Mo
tor
R C
Y
O
W2
W/E
G
1 2 3 4 5 61 2 3 4 5 6
LO
WM
ED
-LO
ME
D-H
IH
IGH
240V
L1
240V
L2
Fu
rnac
e co
ntr
ol p
anel
SE
Q 1
(W
2)
24V
CO
M24
V H
OT
SE
Q 2
(W
2)
1 2 3 4 5 6
1 2 3 4 5 6
GO
PE
N
LMLM
HH
C
Fu
rnac
e W
ith
th
e A
C/H
eat
Pu
mp
R
elay
Box
an
d a
Hea
t P
um
p
R C
Y
O
E
W2
R
C
Y
O W
2 E
G
12
34
56
12
34
56
Po
wer
mis
er
Co
mp
ress
or
Sec
tio
n
Blo
wer
Mo
tor
R
C
Y
O W
2 W
/E G
1 2 3 4 5 61 2 3 4 5 6
LO
WM
ED
-LO
ME
D-H
IH
IGH
240V
L1
240V
L2
Fu
rnac
e co
ntr
ol p
anel
SE
Q 1
(W
2)
24V
CO
M24
V H
OT
SE
Q 2
(W
2)
1 2 3 4 5 6
1 2 3 4 5 6
GO
PE
N
LMLM
HH
C
Fu
rnac
e W
ith
th
e A
C/H
eat
Pu
mp
Rel
ay B
ox a
nd
a P
ow
erm
iser
C W
2 G
R
G
Y
W2
O
P
R
Po
wer
mis
erT-
Sta
t
C W
1 G
Y
E
F
O
P
R
X
Fan
Co
il
T-S
tat
OD
T
LE
GE
ND
Fie
ld W
irin
g
Fact
ory
Wir
ing
Wir
e H
arn
ess
Su
pp
lied
wit
h R
elay
Box
Wir
e H
arn
ess
Su
pp
lied
wit
h R
elay
Box
Wir
e H
arn
ess
Su
pp
lied
wit
h R
elay
Box
Wir
e H
arn
ess
Su
pp
lied
wit
h R
elay
Box
Wir
e H
arn
ess
Su
pp
lied
wit
h R
elay
Box
NO
TE
: a ju
mp
er
wir
e m
ust
co
nn
ect
the
two
R t
erm
inal
s o
n t
he
ther
mo
stat
.
Op
tio
nal
Hea
t P
um
p
Inte
rco
nn
ect
Cab
le
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
7
Figure 6. Wiring Schematics
P1
H MH ML L
COOL HEAT
K1
K2
P2
K3
K3
K4
COOL
OFF
HEAT
AUTO
FAN ON
K1
Cooling Speed Selector (violet wire)
Heating Speed Selector (orange wire)
K2
K4
Blower Switch
Temperature Switch
2 Wire Circuit Board (used in relay box 902986)
AC/Heat Pump Circuit Board (used in relay box 902987)
P2
K1
K2
P1
H MH ML L
COOL HEAT
K1
K2
Cooling Speed Selector (violet wire)
Heating Speed Selector (orange wire)
6 5 4 3 2 1
6 5 4 3 2 1
6
5
4
3
2
1
7
8
6
5
4
3
2
1
7
8
Y R C W
R C Y O W2 W/E G
O’Fallon, MO
707545A (Replaces 7075450)Specifications and illustrations subject to change without
notice and without incurring obligations. Printed inU.S.A. (06/06)
¢7075457¤707545A