Carrier 58SSB User Manual

58SSB

... ..„„0 .0 Accessory Variable Speed Blower Kit

Installation Instructions

GENERAL

These instructions cover installation of an ECM blower
accessory on 2- and 3-ton cooling 58SSB 060 and 080
furnaces. ECM blower accessory Part No. 58SSB900131
is used on 2-ton cooling 58SSB060 furnace and Part No.
58SSB900141 is used on3-toncooling58SSB080furnace.

Each ECM blower kit comes completely assembled
with an ECM blower motor and controller, and interface
circuit board. See Table 1 for a list of parts in assembly
shown in Fig. 1.

ECM blower kit is used in conjunction with following

variable speed outdoor units:

38EV024320
38EV036320
38QV024320
38QV036320

This ECM blower is controlled by outdoor unit and
provides variable airflow across furnace coil in response
to variable demand on heat pump or air conditioner. For
emergency heat, interface circuit board allows furnace
control board to operate ECM blower at a fixed rate of

speed. This speed is normally adjusted to midpoint of
rating plate temperature rise range. Interface circuit
board also powers a Parker indoor thermostat. Part No.
HH05ZA001.

Installation of indoor coil expansion valve, and start

up and adjustment instructions are covered in Installa
tion, Start-Up and Service Instructions for the 38EV,QV
outdoor units. See detailed system operation and control
in the 38EV,QV system operation and troubleshooting
guide.

A WARNING

Turn off power at main disconnect switch before
starting installation to avoid possibility of electrical
shock.

TABLE OF CONTENTS

Page

INSTALLATION ..................................................................1-4

SEQUENCE OF OPERATION
TEMPERATURE RISE ADJUSTMENT
CARE AND MAINTENANCE

INSTALLATION

The following steps should be performed by a qualified

service person:

1. Turn off power at main disconnect.

2. Remove blower door.

3. Remove control box from bottom side of blower
shelf and position out of way.

4. Remove electrical leads from numbered side of
blower speed selector.

5. Remove screws securing blower assembly to blower
shelf and slide blower assembly out of furnace.

6. Unpackage ECM blower assembly and set the
minimum and maximum torque settings on ECM

blower control via access in lower mounting bracket
as shown in Fig. 2.

.........................................

....................

..........................................

5

6

6,7

Table 1 — ECM Blower Kit Parts List

ITEM

1
2
3
4
5
6
7
8
9

10
11
12
13
14 Cutoff, Blower 1
15

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.

Book|1 14 PC101 Catalog No. 535-857 Printed in U.S.A. Form58SSB-5SI Pgl 4-87 Replaces:New

Tab |6a|8a

Housing-Blower
Band-Motor Mount
Arm-Motor Mount
Wheel-Blower
T ransformer
Motor (ECM) 1
ECM Motor Controller

Top Blower Control Bracket
Grommet-Isolator

Interface Board
Interface Box
Interface Box Cover

Electrical Noise Suppressor 1

DESCRIPTION

Bottom Blower Control Bracket

QUANTITY

1
1
3
1
1

1
1
1
3

1
1
1

58SSB900131

PART NO.

58SSB309891-701
HC98ZZ480
HC98ZZ242
LA22RA101
HT01AW232
HC42SE113
HR46KH001
58SSB308056-201
58SSB308056-202
09-0135

HK42FA002
58SSB309863-401
58SSB309864-301
79725-2
HK99FA001

58SSB900141

PART NO.

58SSB309891-702
HC98ZZ480
HC98ZZ248

LA22RA100
HT01AW232
HC42SE113
HR46KH001

58SSB308056-201

58SSB308056-202
09-0135
HK42FA002

58SSB309863-401

58SSB309864-301

79725-3
HK99FA001

TORQUE SELECT

[ 1

pnnnnnnn

r)

pmnnnnf^

MIN.

LIMIT

, (WHITE)

FURNACE

SIZE

58SSB060 3 7
58SSB080

MIN

SETTING

3

Fig. 2 — Torque Setting

7. Slide ECM blower assembly into furnace and tighten
screws to secure blower assembly to the blower shelf.

8. Reinstall furnace control box on bottom side of
blower shelf.

9. Connect electrical leads from furnace control pre
viously used as blower speed selector taps to
numbered connector which is panel mounted on the
left side of the interface control box. Black lead to
position 1, red lead to position 2, white lead to posi
tion C.

10. Double-check to make sure main power disconnect
is off.

In steps 11 through 14, the 115-v power leads to ECM
blower icit connects in parallel with furnace 115-v power
supply. To do this:

11. Remove cover of auxiliary junction box.

|j

^ MAX.

LIMIT

(BLACK)

SETTING

MAX

10

12. Remove strain relief securing the power leads in place
on the auxiliary J-box.

13. Route power leads from ECM blower kit through
opening in back of auxiliary junction box. Dis

connect black lead from furnace control at door

switch, and connect black lead with 3/16-in. piggy
back quick-connect from ECM blower kit in its place.
Then reconnect black lead from furnace control to
3/16-in. male quick-connect provided on piggyback
connector. Remove wire connecting white lead of
furnace control to line voltage common line. Connect
white wire from ECM blower kit and reinstall wire
nut.

14.

Make sure all power leads are secured in place using
the strain relief provided with this kit.

Reinstall cover to auxiliary junction box.

15.
Disconnect all existing thermostat leads from the

16.

furnace control board if applicable.
Connect W, R, and C from terminal block TB3

17.
labeled, HEAT, on interface circuit board located on
front of blower housing to their respective thermostat
connections on furnace control board, labeled (W,
R, C) using field-supplied thermostat wire cut 6 in.
in length and stripped 1 /4 in. on each end. See Fig. 3.

18.

Install thermostat following instructions included
with outdoor section. For single zone applications,

route 6-conductor thermostat wire into furnace
through one of the knock-outs in the cabinet. Multi
zone applications require only 3-conductor wire.

Slide electrical noise suppressor provided, over

19.

thermostat wire before making electrical connections

(see Fig. 3) at blower assembly.
NOTE; For electrical interference and noise, refer to

38EV,QV outdoor section Installation, Start-Up and

Service Instructions.

AUXILIARY
JUNCTION BOX

ECM BLOWER KIT
INTERFACE BOARD-

FIELD LOW-VOLTAGE WIRING

■ FIELD HIGH-VOLTAGE WIRING

FACTORY LOW-VOLTAGE WIRING

LOW-VOLTAGE
TERMINAL BLOCK

PARKER INDOOR
THERMOSTAT TERMINALS

ELECTRICAL
NOISE

SUPPRESSOR

----------------------

THERMOSTAT LINE

(SEE FIG. 4a OR FIG. 4b
FOR CONNECTIONS)

INTERFACE CABLE

► SINGLE

PHASE

VAR. SPEED
CONDENSING

1

UNIT

NOTE: If any of the original wire as supplied must be replaced, use same type or equivalent wire.

Fig. 3 — Field High- and Low-Voltage Wiring Diagram

INTERFACE BOARD

PARKER
INDOOR THERMOSTAT INTERFACE BOARD

PARKER
INDOOR THERMOSTAT

BUS

VZD/TSR

4a — SINGLE ZONE

Fig. 4 — Thermostat Connections

20. Strip thermostat wire leads back 1/8-in. and make
connections to blower kit interface board as shown
in Fig. 4a or 4b. Slide noise suppressor down thermo
stat wire and position close to interface board.

21. Route interface cable provided with Model 38EV or
QV outdoor unit to furnace, as described in Model

38EV,QV installation instructions.

22. To permit routing of interface cable into furnace

blower compartment it is necessary to modify furnace
cabinet according to the following procedure,
referring to Fig. 5.

a. Provided with kit are 2 sheet metal covers, screws

and snap bushing. See Fig. 5. Use one cover as a
template. Mark and drill two 1/8-in. diameter
mounting screw holes in either side of furnace
cabinet.

NOTE: Be sure to locate cable entry hole where
cable does not interfere with interior furnace com
ponents. Also, before making hole be sure cable
reaches proper receptacle (PI) on blower acces
sory interface board.

b. Use a chassis punch or similar tool to cut a 1 /2-in.

X 1-5/8 in. rectangular cable entry opening
between the 2 sheet metal cover mounting screw
holes to permit passage of interface cable

connector.

c. Mount the 2 sheet metal covers loosely to cabinet

with one screw. See Fig. 5.

d. Route interface cable through cable entry hole

into furnace blower compartment to receptacle PI
of blower accessory interface board. Connector is

polarized so it cannot be mounted in wrong direc
tion. Be sure spring clips on connector lock in
place to secure connector. Secure cable ground
wire to convenient interface board mounting
screw.

e. Mount indoor coil solenoid expansion valve

(SEV) as described in Model 38EV,QV outdoor
section installation instructions. Route 4-lead
wire harness from SEV through interface cable
entry hole to interface board polarized recep

tacle P2.

f. Open snap bushing provided and install busliing

around interface cable and 4 SEV leads at cable
entry hole with large rim of bushing facing out
ward from cabinet.

g. Slide 2 sheet metal covers together around bush

ing and secure covers loosely with remaining
mounting screw. Adjust cable and leads to allow

slack inside cabinet for strain relief.

h. Tighten both sheet metal cover mounting screws

with bushing positioned to protect cable and
leads from metal edges of cable entry hole.

4b — MULTI-ZONE

COVER DISASSEMBLED WITH

SNAP BUSHING ATTACHED TO LEADS

COVER FULLY ASSEMBLED

Fig. 5 — Cable Entry Hole and Cover

23.

Peel off backing from wiring diagram and stick on
top of previous furnace wiring diagram located on
inside of blower access panel.

24.

Reinstall control and blower access panels. See Fig. 3
for a wiring diagram showing proper field high- and
low-voltage wiring. Make all electrical connections
in accordance with National Electrical Code and any
local codes or ordinances that might apply.

25.

Clean 2-in. x 3-in. area next to unit rating plate.

Peel backing from auxiliary rating plate and stick to

26.
clean area next to unit rating plate.

NOTE: DO NOT apply auxiliary rating plate on top
of the unit rating plate. Make sure both rating plates
are legible after installation.