Broan E2 Furnace Blower Relay Installation guide

Brand: Broan

Model: E2 Furnace Blower Relay

Category: Heat pumps

Type: Installation guide

This manual is also suitable for

Electric Furnace Blower Relay Kit

The p/n 903091 2-wire and p/n 902987 A/C

Heat Pump (4 to 7 wire) Relay Boxes install with

current models of the E2 and current models of

the E(1,2) NORDYNE electric furnaces respec-

tively. The 2-wire Relay Box has control switches

that are operable through an opening in the

furnace door, where applicable.

Important Information

Read all instructions carefully before starting

the installation. Specifications or designs are

subject to change or to discontinuance without

notice and without incurring obligations.

WARNING:

Improper installation may damage

equipment, can create a hazard, and

will void the warranty.

Installation Instructions

2 Wire: For models E2E(H,B) Series

4-7 Wire: For models E(1,2)EH Series

Electric Furnace - Relay

DANGER:

Shut off electrical supply to the fur-

nace at the household breaker box to

prevent electrical shock which could

cause personal injury.

These instructions are primarily intended to

assist qualified individuals experienced in the

proper installation of heating and/or air condi-

tioning appliances. Some local codes require

licensed installation/service personnel for this

type of equipment. Read all instructions care-

fully before starting the installation.

Circuit

Breakers

Relay Box

Wiring Harness

plugs here on

Furnace Control

Panel

Blower

and

Relay

Decorative

Door Insert

Door Control

Frame (used w/

2 wire relay box)

Furnace

Door

Wiring

Harness

Low Voltage

Wiring

Blower

Connector

Connects

Here

Connect

8 Pin

Connector

on Wiring

Harness

Here

Blower

Connector

(Connect to

Relay Box)

Wiring Harness

Connect

to Relay

Box

Connect

to Furnace

Control Panel

Figure 1. E1E(-) Series Electric Furnace

Circuit

Breakers

Relay Box

Wiring Harness

plugs here on

Furnace Control

Panel

Blower

and

Relay

Furnace

Door

Wiring

Harness

Low Voltage

Wiring

Figure 2. E2E(-) Series Electric Furnace, manufactured prior to 1999

Figure 2a. E2E(-) Series Electric Furnace, manufactured 1999 or later

Connect Blower

Connector Here

Blower Connector

(Connect to Relay Box)

Circuit

Breakers

Relay Box

Wiring Harness

plugs here on

Furnace Control

Panel

Blower

and

Relay

Nameplate

Insert

Door Control

Frame (used w/

2 wire relay box)

Furnace

Door

Wiring

Harness

Low Voltage

Wiring

Connect 8 Pin

Connector on

Wiring Harness

Here

Connect Blower

Connector Here

Blower Connector

(Connect to Relay Box)

Connect 8 Pin

Connector on

Wiring Harness

Here

Installation Sequence for Models

E(1,2) E(H,B) Series Electric

Furnace (See Figure 1, 2, or 2a)

Prior to installing a relay box in the NORDYNE

furnace, be sure to install the correct A/C sys-

tem equipment as outlined on the furnace op-

tions label.

Remove the furnace door by pulling outward

either from the top or the top side of the door.

Switch the circuit breaker(s) to the OFF posi-

tion. (See Figure 1, 2, or 2a for the circuit

breaker location.)

Before installing the relay box remove the blower

and install the cabinet insulation kit for furnaces

that are not factory equipped with this package.

Refer to the instructions supplied with the kit for

proper installation.

E(1,2)EH Models: All E(1,2)EH models require

a relay box when adding an air conditioner or

heat pump.

E2EB Models: E2EB models using a 2-wire

thermostat require a relay box (2-wire) when

adding an air conditioner.

Blower Selection: See the furnace Installation

Instructions for the correct air conditioning or

heat pump available with the factory installed

furnace blower. Change out the blower when

needed.

Remove the cover from the relay box by remov-

ing the screw from each side.

Blower Speed Selection:

• HEATING - Move the orange wire on the

circuit board to one of the four quick-connects

labeled with heating blower speeds.

• COOLING - Move the violet wire on the circuit

board to one of the three quick-connects

labeled with cooling blower speeds.

• TWO SPEED BLOWER - Connect the or-

ange wire (heating) to the L (low) quick-

connect for low speed. Connect the violet

wire (cooling) to the ML (medium low) quick-

connect for high speed.

• THREE OR FOUR SPEED BLOWER - See

Table 1 for the appropriate speed connec-

tions for the E1E(-) and Table 2 for the E2E(-).

Reattach the relay box cover using the two

screws previously removed.

IMPORTANT: For the 2-wire relay box (only

after the cover has been reattached):

a. Attach two red caps (provided in plastic

bag) to the switches that stick through the

bezel on the sheet metal cover (see Figure

3, items 7 and 8).

E1 and E2 furnace models manufactured

prior to 1999 only:

Attach the appropriate

brand label to the sheet metal cover so that

it may be seen through the door control

frame (see Figure 2) in the furnace door

when it is replaced.

E1 and E2 furnace models manufactured

prior to 1999 only:

Attach the foam “stand-

off” to the bottom corner on the back side

Furnace Operation (orange wire)

Furnace Model # -010, 012

-015, -017,

-020, -023

Relay Box Speed

Terminal (min.)

LML

Air Conditioning/Heat Pump Operation (violet wire)

Air Conditioning Model # -024 -030, -036

-042, -046,

-048

Heat Pump Model # -018 -024, 030

-036, -042,

-048

Relay Box Speed

Terminal (min.)

ML MH H

Note: See furnace installation instruc-

tions 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 – 3 or 4 Speed Blower

Air Conditioning/Heat Pump Operation (violet wire)

SEE FURNACE BLOWER LABEL OR FURNACE

INSTALLATION INSTRUCTIONS FOR

APPROPRIATE SPEED CONNECTIONS

Note: See furnace installation instructions

for nominal air deliveries.

Furnace Operation (orange wire)

Furnace Model #

Relay Box Speed

Terminal (min.)

L-3 spd ML-4 spd

-010, -012, -015,

-017, -020, -023

of the relay box opposite the side where the

bracket is attached (See Figure 2b). This

standoff will prevent movement of the relay

box when the homeowner adjusts the

switches.

Relay Box Attachment

(See Figure 1, 2, or 2a)

Attach the mounting bracket to the appropriate

side of the relay box. Attach the relay box to the

side of the blower housing. For E2 furnaces

manufactured 1999 or later, bracket should be

attached by self tapping 2 screws into the side

of the blower housing approximately 1/2” back

from the mounting holes.

Insert the relay/blower assembly into the fur-

nace by sliding it into the furnace and under the

mounting tabs. Secure the blower in place by

using the blower screws previously removed.

Relay Box Connection (See Figure 1, 2, or 2a):

• Unplug the blower connector and the thermo-

stat pigtail leads connector from the furnace

control panel.

• Plug the two different 6-circuit connectors on

the relay box wiring harness into their corre-

sponding locations on the furnace control

panel (where the blower and thermostat leads

connectors were just removed).

• Plug the 8-circuit connector on the other end of

the wiring harness into the side of the relay box.

• Plug the 6-circuit blower connector into the

bottom of the relay box.

Low Voltage Wiring

(See Figure 1, 2, or 2a)

Bring in the low voltage field wires from the

thermostat and air conditioning or heat pump

unit and attach them to the screw terminals

located at the top of the relay box. See Figure 5

for System Wiring.

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 (where applicable), the thermostat sys-

tem switch to HEAT, and the thermostat fan

switch to AUTO.

Cooling: Set the furnace system switch to

AUTO (where applicable), the thermostat sys-

tem switch to COOL, and the thermostat fan

switch to AUTO.

Emergency Heat: (Used with a heat pump

only.) Set the furnace system switch to AUTO

(where applicable), the thermostat system switch

to EMERGENCY HEAT, and the thermostat fan

switch to AUTO.

Continuous Air Circulation: Set the thermo-

stat fan switch to ON.

Shut off System: Set the thermostat system

switch to OFF and set it to the lowest tempera-

ture setting. Set the furnace system switch to

OFF and shut off all power to the air conditioner.

For the 2-Wire Relay Box

Heating: Set the furnace system switch to

AUTO (where applicable), the temperature

switch (on the relay box) to HEAT, and the fan

switch (on the relay box) to AUTO.

Cooling: Set the furnace system switch to

AUTO (where applicable), the temperature

switch (on the relay box) to COOL, and the fan

switch (on the relay box) to AUTO.

Continuous Air Circulation: Set the fan switch

(on the relay box) to ON.

Shut off System: Set the temperature switch

(on the relay box) to OFF and set the thermostat

to the lowest temperature setting. Set the

furnace system switch to OFF and shut off all

power to the air conditioner.

Attach foam "standoff" here

Figure 2b. E2E(-) (Pre-1999 manufacture)

Electric Furnace w/2 wire Relay Box

Blower and Relay Replacement Parts List

Figure 3. 2 Wire Relay Box, Exploded View

Figure 3. A/C Heat Pump Relay Box, Exploded View

Model p/n 903091

Model p/n 902987

ITEM

# PART # DESCRIPTION 903091 902987

1 375952 Cover (2 Wire) 1

376431 Cover (AC/HP) 1

2 378700 Box, Relay 1 1

3 624567 2 Wire Relay Circuit Board 1

624625 AC/HP Relay Circuit Board 1

4 259200 Wire Harness 1 1

5 376050 Mounting Bracket, E1 - 1

6 380790 Mounting Bracket, E2 1 1

7 669084 Bezel 1 -

8 632278 Switch Cap 2 -

Figure 5. System Wiring

Blower

Motor

123 456

R Y W G

A/C O.D. Section

4 Wire A/C

T- Stat

8 765

4 3

Blower

Motor

R C Y O W

W/E G

Furnace With the AC/Heat Pump

Relay Box and a 4 Wire Thermostat

123 456

RC RH Y W G

A/C O.D. Section 5 Wire A/C

T- Stat

8 765

3 21

Blower

Motor

R C Y O W 2 W/E G

Furnace With the AC/Heat Pump

Relay Box and a 5 Wire Thermostat

123 456

R W

A/C O.D. Section

2 Wire Heat

Only T-Stat

8 765

4 3

8 765

4 3

Y R C W

Furnace With the 2 Wire Relay

Box and a 2 Wire Thermostat

HEAT

COOL

OFF

AUTO

FAN

123 456

H/P O.D. Section

H/P

T- Stat

Blower

Motor

R C Y O W2 W/E G

Furnace With the AC/Heat Pump

Relay Box and a Heat Pump

R C Y O E W2

R C Y O W2 E G

123 456

Powermiser

Compressor Section

Blower

Motor

R C Y O W2 W/E G

Furnace With the AC/Heat Pump Relay Box and a Powermiser

C W2 G R G Y W2 O P R

Powermiser

T- Stat

C W1 G Y E F O P R X

Fan Coil T-Stat

ODT

LEGEND

Field Wiring

Factory Wiring

Wire Harness Supplied with Relay Box

Wire Harness Supplied

with Relay Box

Wire Harness Supplied

with Relay Box

Wire Harness Supplied

with Relay Box

Wire Harness Supplied with Relay Box

Optional

Heat Pump

Interconnect

Cable

8 765

3 21

8 765

3 21

8 765

3 21

8 765

3 21

8 765

3 21

Furnace

control panel

1: SEQ1 (W2)

2: SEQ2 (W2)

3: 24V COM

4: 24V HOT

5: G

6: OPEN

240V L2

240V L1

HIGH

MED-HIGH

MED-LOW

LOW

Furnace

control panel

1: SEQ1 (W2)

2: SEQ2 (W2)

3: 24V COM

4: 24V HOT

5: G

6: OPEN

240V L2

240V L1

HIGH

MED-HIGH

MED-LOW

LOW

Furnace

control panel

1: SEQ1 (W2)

2: SEQ2 (W2)

3: 24V COM

4: 24V HOT

5: G

6: OPEN

240V L2

240V L1

HIGH

MED-HIGH

MED-LOW

LOW

Furnace

control panel

1: SEQ1 (W2)

2: SEQ2 (W2)

3: 24V COM

4: 24V HOT

5: G

6: OPEN

240V L2

240V L1

HIGH

MED-HIGH

MED-LOW

LOW

Furnace

control panel

1: SEQ1 (W2)

2: SEQ2 (W2)

3: 24V COM

4: 24V HOT

5: G

6: OPEN

240V L2

240V L1

HIGH

MED-HIGH

MED-LOW

LOW

Figure 6. Wiring Schematics

H(H)* MH(M)* ML(L)* L

COOL

HEAT

COOL

OFF

HEAT

AUTO

FAN ON

Cooling Speed

Selector (violet wire)

Heating Speed

Selector

(orange wire)

Blower

Switch

Temperature

Switch

2 Wire Circuit Board (used in relay box 903091)

AC/Heat Pump Circuit Board (used in relay box 902987)

COOL

HEAT

Cooling Speed

Selector (violet wire)

Heating Speed

Selector

(orange wire)

6 5 4 3 2 1

YR C W

R C Y O W2 W/E G

* - 3 speed motor

H(H)* MH(M)* ML(L)* L

O’Fallon, MO

7088020 (Replaces 708136A)

Specifications and illustrations subject to change without

notice and without incurring obligations. Printed in

U.S.A. (08/07)

¢708802®¤

7088020

Broan E2 Furnace Blower Relay Installation guide

Brand: Broan

Model: E2 Furnace Blower Relay

Category: Heat pumps

Type: Installation guide

This manual is also suitable for

Electric Furnace Blower Relay Kit

Download PDF

report

Broan E2 Furnace Blower Relay Installation guide

This manual is also suitable for

Broan E2 Furnace Blower Relay Installation guide

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