installer's guide 24 volt harness kit bayachp024a
TRANSCRIPT
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.
© 2008 Trane
Installer’s Guide
This kit is used to convert a communicating outdoor unit to 24 volt control.
PRE-INSTALLATION OVERVIEW:
1. Be certain power to unit is DISCONNECTED. 2. Before beginning, review Table 1 below which defines
maximum total length of low voltage wiring from the outdoor unit to the indoor unit, and to the Comfort Control.
3. Refer to Table 2 to select the proper figure for each model. The "A" figures depict the communicating harness as supplied from the factory. The "B" figures depict how the unit should be wired after the field-supplied 24 volt harness is installed.
4. Follow the instructions within each figure to remove the communicating control harness and install the field-supplied 24 volt harness.
5. Finally, after the 24 volt harness installation, select the proper replacement wiring diagram in Table 3 and place over the existing wiring diagram.
18-HH16D1-6
24 VOLT HARNESS KIT BAYACHP024A
TABLE 1
NEC CLASS II WIRING, 24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 FT
16 AWG 225 FT.
14 AWG 300 FT.
▲ WARNING! This information is for use by individuals having adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may re-sult in personal injury and/or property damage. The manu-facturer or seller cannot be responsible for the interpreta-tion of this information, nor can it assume any liability in connection with its use.
▲ WARNING! RISK OF ELECTRIC SHOCK: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in these operating instructions unless you are qualified to do so.
▲ WARNING! Hazardous Voltage w/Capacitors!Disconnect all electric power, including remote discon-nects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing compo-nents provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate volt-meter that all capacitors have discharged. Failure to dis-connect power and discharge capacitors before servicing could result in death or serious injury.
TABLE 2
ModelExisting
Communicating Harness
After Converted Using Field
Supplied 24V Harness
2A7A8
Figure 1A Figure 1B2A6H8
2TTZ9
2TWZ9
4A7Z0
Figure 2A Figure 2B4A6Z0
4TTZ0
4TWZ0
4A7A6
Figure 3A Figure 3B4A6H6
4TTX6
4TWX6
2 18-HH16D1-6
Installer’s Guide
PR
INT
ED
FR
OM
D15
4943
P03
RE
V. 0
2
FIG
UR
E 1
A -
Ex
IST
ING
CO
MM
UN
ICA
TIN
G C
ON
TR
OL
HA
RN
ES
S (
MO
DE
LS
2A
7A8,
2A
6H8,
2T
Tz
9, 2
TW
z9)
RE
MO
VAL
: 1.
B
e ce
rtai
n p
ower
to
un
it is
DIS
CO
NN
EC
TE
D.
2.
Rem
ove
cove
r pa
nel
on
con
trol
box
com
part
men
t.3.
F
igu
re 1
A s
how
s a
typi
cal w
irin
g h
arn
ess
(dep
icte
d in
bol
d li
nes
). T
his
har
nes
s co
nsi
sts
of t
he
4-w
ire
plu
g as
sem
bly
(J1)
.
Dis
con
nec
t an
d re
mov
e th
e ex
isti
ng
com
mu
nic
atin
g co
ntr
ol h
arn
ess
asse
mbl
y in
th
e st
eps
belo
w.
R
emov
e th
e re
d w
ire
and
fuse
ass
embl
y fr
om t
he
tran
sfor
mer
.
Rem
ove
the
blu
e le
ad f
rom
th
e tr
ansf
orm
er.
R
emov
e th
e gr
een
/yel
low
tra
nsf
orm
er g
rou
nd
wir
e. (
DO
NO
T d
isca
rd.
Wir
e w
ill b
e re
con
nec
ted
in S
tep
4 in
Fig
ure
1B
.)
Rem
ove
the
brow
n w
ire
goin
g to
fiel
d co
nn
ecti
ons.
R
emov
e th
e bl
ue
wir
e go
ing
out
to fi
eld
con
nec
-ti
ons.
R
emov
e th
e do
ubl
e bl
ue
wir
e co
nn
ecti
on t
erm
inal
at
th
e L
o co
nta
ctor
coi
l.
4.
Dis
con
nec
t an
d re
mov
e th
e tw
o tr
ansf
orm
er p
rim
ary
wir
es (
depi
cted
in b
old
lin
es).
R
emov
e th
e br
own
/red
wir
e fr
om t
he
star
t ca
paci
tor
(CS
) to
th
e tr
ansf
orm
er O
NLY
. Do
not
rem
ove
the
bro
wn
/red
wir
e fr
om t
he
star
t ca
pac
itor
to
the
con
tact
or. Y
ou w
ill b
e re
quir
ed t
o cl
ip t
he
brow
n/r
ed w
ire
at t
he
dou
ble
wir
e co
nn
ecti
on o
n t
he
star
t ca
paci
tor
(dep
icte
d in
bo
ld).
R
emov
e th
e bl
ack/
blu
e w
ire
com
ing
from
th
e H
i
con
tact
or.
T
he
tran
sfor
mer
is n
o
lo
nge
r u
sed.
J1
18-HH16D1-6 3
Installer’s GuideF
IGU
RE
1B
- A
FT
ER
INS
TAL
LIN
G F
IEL
D-S
UP
PL
IED
24
VO
LT H
AR
NE
SS
(M
OD
EL
S 2
A7A
8, 2
A6H
8, 2
TT
z9,
2T
Wz
9)
INS
TAL
LA
TIO
N:
1.
Con
nec
t th
e 24
vol
t h
arn
ess
(su
ppli
ed w
ith
th
is k
it)
to t
he
con
trol
boa
rd, w
her
e th
e co
mm
un
icat
ing
har
-n
ess
was
rem
oved
(co
nn
ecto
r J1
).
2.
Tak
e th
e do
ubl
e bl
ue
lead
ter
min
al a
nd
con
nec
t to
th
e L
o co
nta
ctor
coi
l, w
her
e th
e pr
evio
us
blu
e le
ad
was
rem
oved
.
CA
UT
ION
: D
O N
OT
CO
NN
EC
T T
O H
IGH
VO
LT
AG
E!
(S
ee F
igu
re 1
C o
n b
ack
page
)
3.
Rou
te t
he
rem
ain
ing
yell
ow, b
lue,
ora
nge
, red
, bla
ck
and
yell
ow/r
ed w
ires
ou
t fo
r fi
eld
con
nec
tion
as
show
n.
For
AC
un
its
see
Not
e 1.
4.
Rec
onn
ect
the
gree
n/y
ello
w g
rou
nd
wir
e (r
emov
ed in
S
tep
3 in
Fig
ure
1A
) to
th
e 24
V c
omm
on s
ide
of t
he
Lo
con
tact
or c
oil.
Sec
ure
scr
ew a
nd
eyel
et o
f gr
oun
d w
ire
into
dim
ple
to r
igh
t of
Hi c
onta
ctor
. (S
ee F
ig-
ure
1C
on
bac
k pa
ge.)
CA
UT
ION
: D
O N
OT
CO
NN
EC
T T
O H
IGH
VO
LT
AG
E!
(S
ee F
igu
re 1
C o
n b
ack
page
)
5.
Pla
ce t
he
prop
er r
epla
cem
ent
wir
ing
diag
ram
ove
r th
e ex
isti
ng
un
it w
irin
g di
agra
m (
see
Tab
le 3
).6.
R
epla
ce t
he
con
trol
com
part
men
t co
ver
pan
el.
7.
Rec
onn
ect
pow
er.
8.
Ple
ase
reta
in c
omm
un
icat
ion
har
nes
s
an
d tr
ansf
orm
er f
or p
ossi
ble
futu
re u
se.
PR
INT
ED
FR
OM
D15
5806
P01
RE
V. 0
0
No
te 1
:If
the
unit
is a
co
olin
g-on
ly
mod
el (n
ot a
he
at p
ump)
, the
or
ange
and
bla
ck
lead
s w
ill n
ot b
e us
ed a
nd s
houl
d be
cap
ped
off.
4 18-HH16D1-6
Installer’s Guide
PR
INT
ED
FR
OM
D15
5833
P01
RE
V. 0
0
FIG
UR
E 2
A -
Ex
IST
ING
CO
MM
UN
ICA
TIN
G C
ON
TR
OL
HA
RN
ES
S (
MO
DE
LS
4A
7z0,
4A
6z0,
4T
Tz
0, 4
TW
z0)
RE
MO
VAL
: 1.
B
e ce
rtai
n p
ower
to
un
it is
DIS
CO
NN
EC
TE
D.
2.
Rem
ove
cove
r pa
nel
on
con
trol
box
com
part
men
t.3.
F
igu
re 2
A s
how
s th
e w
irin
g h
arn
ess
(dep
icte
d in
bo
ld li
nes
). T
his
har
nes
s co
nsi
sts
of t
he
5-w
ire
plu
g as
sem
bly
(J1)
.
Dis
con
nec
t an
d re
mov
e th
e ex
isti
ng
com
mu
nic
atin
g co
ntr
ol h
arn
ess
asse
mbl
y in
th
e st
eps
belo
w.
R
emov
e th
e re
d w
ires
an
d fu
se a
ssem
bly
from
th
e tr
ansf
orm
er.
R
emov
e th
e bl
ue
wir
e go
ing
to t
he
tran
sfor
mer
fr
om t
he
term
inal
blo
ck.
(Th
e te
rmin
al b
lock
is
loca
ted
at t
he
bott
om le
ft s
ide
of t
he
con
trol
box
.)
Rem
ove
the
blu
e w
ire
that
is p
art
of t
he
J1 c
on-
trol
har
nes
s at
th
e te
rmin
al b
lock
.
Th
e J1
plu
g an
d it
s 5
wir
es c
an n
ow b
e re
mov
ed.
4.
Dis
con
nec
t an
d re
mov
e th
e tw
o tr
ansf
orm
er p
rim
ary
wir
es (
depi
cted
in b
old
lin
es).
R
emov
e th
e br
own
/red
wir
e fr
om t
he
tran
sfor
mer
an
d at
th
e L
o co
nta
ctor
, L1.
R
emov
e th
e bl
ack/
blu
e w
ire
goin
g fr
om t
he
tran
s-fo
rmer
to
the
Hi c
onta
ctor
, L2.
Th
e tr
ansf
orm
er is
no
lon
ger
use
d.
18-HH16D1-6 5
Installer’s GuideF
IGU
RE
2B
- A
FT
ER
INS
TAL
LIN
G F
IEL
D-S
UP
PL
IED
24
VO
LT H
AR
NE
SS
(M
OD
EL
S 4
A7z
0, 4
A6z
0, 4
TT
z0,
4T
Wz
0)
INS
TAL
LA
TIO
N:
1.
Con
nec
t th
e 24
vol
t h
arn
ess
(su
ppli
ed w
ith
th
is k
it)
to t
he
con
trol
boa
rd, w
her
e th
e co
mm
un
icat
ing
har
-n
ess
was
rem
oved
(co
nn
ecto
r J1
).
2.
Con
nec
t th
e do
ubl
e bl
ue
lead
ter
min
al a
t th
e 24
vol
t bl
ue
wir
e co
mm
on t
erm
inal
blo
ck.
3.
Rou
te t
he
rem
ain
ing
yell
ow, b
lue,
ora
nge
, red
, bla
ck
and
yell
ow/r
ed w
ires
ou
t fo
r fi
eld
con
nec
tion
as
show
n.
For
AC
un
its
see
Not
e 1.
4.
Pla
ce t
he
prop
er r
epla
cem
ent
wir
ing
diag
ram
ove
r th
e ex
isti
ng
un
it w
irin
g di
agra
m (
see
Tab
le 3
).5.
R
epla
ce t
he
con
trol
com
part
men
t co
ver
pan
el.
6.
Rec
onn
ect
pow
er.
7.
Ple
ase
reta
in c
omm
un
icat
ion
har
nes
s an
d tr
ans-
fo
rmer
for
pos
sibl
e fu
ture
use
.
PR
INT
ED
FR
OM
D15
5836
P01
RE
V. 0
1
No
te 1
:If
the
unit
is a
co
olin
g-on
ly
mod
el (n
ot a
he
at p
ump)
, the
or
ange
and
bla
ck
lead
s w
ill n
ot b
e us
ed a
nd s
houl
d be
cap
ped
off.
6 18-HH16D1-6
Installer’s Guide
PR
INT
ED
FR
OM
D15
5406
P01
RE
V. 0
0
FIG
UR
E 3
A -
Ex
IST
ING
CO
MM
UN
ICA
TIN
G C
ON
TR
OL
HA
RN
ES
S (
MO
DE
LS
4A
7A6,
4A
6H6,
4T
Tx
6, 4
TW
x6)
RE
MO
VAL
: 1.
B
e ce
rtai
n p
ower
to
un
it is
DIS
CO
NN
EC
TE
D.
2.
Rem
ove
cove
r pa
nel
on
con
trol
box
com
part
men
t.3.
F
igu
re 3
A s
how
s th
e w
irin
g h
arn
ess
(dep
icte
d in
bo
ld li
nes
). T
his
har
nes
s co
nsi
sts
of t
he
5-w
ire
plu
g as
sem
bly
(J1)
.
Dis
con
nec
t an
d re
mov
e th
e ex
isti
ng
com
mu
nic
at-
ing
con
trol
har
nes
s as
sem
bly
in t
he
step
s be
low
.
R
emov
e th
e re
d w
ires
an
d fu
se a
ssem
bly
from
th
e tr
ansf
orm
er.
R
emov
e th
e bl
ue
wir
e go
ing
to t
he
tran
sfor
mer
fr
om t
he
con
tact
or c
oil.
D
isco
nn
ect
the
gree
n/y
ello
w g
rou
nd
wir
e fr
om
the
tran
sfor
mer
. (D
O N
OT
dis
card
. W
ire
wil
l be
rec
onn
ecte
d in
Ste
p 4
in F
igu
re 3
B.)
R
emov
e th
e bl
ue
wir
e th
at is
par
t of
th
e J1
co
ntr
ol h
arn
ess
at t
he
con
tact
or c
oil.
T
he
J1 p
lug
and
its
5 w
ires
can
now
be
re-
mov
ed.
4.
Dis
con
nec
t an
d re
mov
e th
e tw
o tr
ansf
orm
er p
ri-
mar
y w
ires
(de
pict
ed in
bol
d li
nes
).
R
emov
e th
e br
own
/red
wir
e fr
om t
he
tran
s-fo
rmer
an
d at
th
e co
nta
ctor
, L1.
R
emov
e th
e bl
ack/
blu
e w
ire
goin
g fr
om t
he
tran
sfor
mer
to
the
con
tact
or, L
2.
T
he
tran
sfor
mer
is n
o lo
nge
r u
sed.
18-HH16D1-6 7
Installer’s Guide
INS
TAL
LA
TIO
N:
1.
Con
nec
t th
e 24
vol
t h
arn
ess
(su
ppli
ed w
ith
th
is k
it)
to
the
con
trol
boa
rd, w
her
e th
e co
mm
un
icat
ing
har
nes
s w
as
rem
oved
(co
nn
ecto
r J1
).
2.
Con
nec
t th
e do
ubl
e bl
ue
lead
ter
min
al t
o th
e co
mm
on
side
of
the
con
tact
or c
oil.
3.
R
oute
th
e re
mai
nin
g ye
llow
, blu
e, o
ran
ge, r
ed, b
lack
an
d ye
llow
/red
wir
es o
ut
for
fiel
d co
nn
ecti
on a
s sh
own
. F
or
AC
un
its
see
Not
e 1.
4.
Rec
onn
ect
the
gree
n/y
ello
w g
rou
nd
wir
e (r
emov
ed in
S
tep
3 in
Fig
ure
3A
) to
th
e 24
V c
omm
on t
erm
inal
on
th
e co
nta
ctor
coi
l.
CA
UT
ION
: D
O N
OT
CO
NN
EC
T T
O H
IGH
VO
LT
AG
E!
5.
Pla
ce t
he
prop
er r
epla
cem
ent
wir
ing
diag
ram
ove
r th
e ex
isti
ng
un
it w
irin
g di
agra
m (
see
Tab
le 3
).6.
R
epla
ce t
he
con
trol
com
part
men
t co
ver
pan
el.
7.
Rec
onn
ect
pow
er.
8.
Ple
ase
reta
in c
omm
un
icat
ion
har
nes
s an
d tr
ansf
orm
er
for
poss
ible
fu
ture
use
.
PR
INT
ED
FR
OM
D15
5795
P01
RE
V. 0
0
FIG
UR
E 3
B -
AF
TE
R IN
STA
LL
ING
FIE
LD
-SU
PP
LIE
D 2
4 V
OLT
HA
RN
ES
S (
MO
DE
LS
4A
7A6,
4A
6H6,
4T
Tx
6, 4
TW
x6)
No
te 1
:If
the
unit
is a
coo
ling-
only
m
odel
(not
a h
eat p
ump)
, th
e or
ange
and
bla
ck
lead
s w
ill n
ot b
e us
ed a
nd
shou
ld b
e ca
pped
off.
Installer’s Guide
11/08
Trane has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice.
Tranewww.trane.com
TABLE 3
ModelWiring
Diagram
2TWZ9030/2A6H8030 D155805
2TWZ9036/2TWZ9048/2TWZ9060 D155806
2A6H8036/2A6H8048/2A6H8060 D155806
2TTZ9030/2A7A8030 D155803
2TTZ9036/2TTZ9048/2TTZ9060 D155804
2A7A8036/2A7A8048/2A7A8060 D155804
4TWZ0/4A6Z0 D155836
4TTZ0/4A7Z0 D155835
4TWX6024/4TWX6048 D155891
4A6H6024/4A6H6048 D155891
4TWX6036/4A6H6036 D155795
4TWX6060/4A6H6060 D155797
4TTX6036/4A7A6036 D155801
4TTX6024/4TTX6048 D155893
4A7A6024/4A7A6048 D155893
4TTX6060/4A7A6060 D155800
CAUTION!Do NOT connect to high voltage terminal!
Connect the double blue lead terminal to the Lo contactor
coil, where the previous blue lead was removed.
(See Step 2, Figure 1B)
Relocated green/yellow ground wire
(See Step 4, Figure 1B)
FIGURE 1C - DETAIL FOR MODELS 2A7A8, 2A6H8, 2TTz9, 2TWz9
REPLACEMENT WIRING DIAGRAMS BY MODEL
(INCLUDED IN KIT)