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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—864
J1069 124,
144,
206,
207
Obsolete
. Hone
y
well lo
g
o; TRADELINE model; used
with Q674J1282; used in Y594J1019.
T8511G1021
J1077 124,
171
Obsolete
. Nord
y
ne lo
g
o; part no. 9148300; °F/°C
scaleplate.
T8511G1021
T874K
Heat pump model; 2-sta
g
e heat, 1-sta
g
e cool, automatic
chan
g
eover in heat.
K1001 77 Obsolete
. LSI Mammoth lo
g
o; used with Q674C1090.
Y594G1419
a
Wirin
g
differences
(
old=new
)
:
RH-RC=R, W1=B, W3=W2,
W2=W1; remove Y1-W1
j
umper.
K1019 181 Obsolete
. McQua
y
/Sn
y
der General lo
g
o; part no.
60687301; °F/°C scaleplate; H1 anticipator set at 0.83A;
8°F intersta
g
e differential between H1 and H2 for ni
g
ht
setback; used with Q674C1280.
Y594G1252
a
Wirin
g
differences
(
old=new
)
:
C=X, W=B, A=L;
j
umper
E-W2; no ni
g
ht setback.
T8611G1004
(
pro
g
rammable
)
Wirin
g
differences
(
old=new
)
:
C=X, W=B, A=X2;
j
umper X2-
R; remove external time clock;
includes ni
g
ht setback.
K1027 181 Obsolete. AAF/Sn
y
der General lo
g
o; part no.
066804403; °F/°C scaleplate; H1 anticipator set at
0.83A; 8°F intersta
g
e differential between H1 and H2 for
ni
g
ht setback; used with Q674C1280.
Y594G1252
a
Wirin
g
differences
(
old=new
)
:
C=X, W=B, A=L;
j
umper
E-W2; no ni
g
ht setback.
T8611G1004
(
pro
g
rammable
)
Wirin
g
differences
(
old=new
)
:
C=X, W=B, A=X2;
j
umper
X2-R; remove external time
clock; includes ni
g
ht setback.
T874L
Heat pump model; 2-sta
g
e heat, 1-sta
g
e cool,
chan
g
eover in cool.
L1000 198 Obsolete. Carrier lo
g
o; part no. HH07AT176; used with
Q674E1270
(
HH93AZ189
)
.
Y594G1419
a
E-W2
j
umper re
q
uired.
L1018 138,
165
Obsolete
. Carrier Multiplex S
y
stem lo
g
o; part no.
HH07AT178; used with Q674B1356
(
HH93AZ192
)
or
Q674C1264
(
HH93AZ193
)
.
See OEM for
replacement.
L1026 198 Obsolete
. Hone
y
well lo
g
o; BDP part no. P272-2786;
used with Q674E1304.
Y594G1419
a
E-W2
j
umper re
q
uired.
L1034 203 Obsolete
. McQua
y
lo
g
o; part no. 60687201; °F/°C
scaleplate; H1 anticipator factor
y
set at 0.83A; used with
Q674C1280.
Y594G1419
a
Wirin
g
differences
(
old=new
)
:
Y=Y1, W=B, A=X1; remove
Y1-W1
j
umper.
L1059 215,
213
Obsolete
. Carrier lo
g
o; part no. HH07AT192; used with
Q674B1448
(
HH93A2202
)
or Q674C1413
(
HH93AZ204
)
.
See OEM for
replacement.
L1067 203 Obsolete. AAF/Sn
y
der General lo
g
o; part no.
066804402; H1 anticipator factor
y
set at 0.83A; used
with Q674C1280.
Y594G1419
a
Wirin
g
differences
(
old=new
)
:
Y=Y1, W=B, A=X1; remove
Y1-W1
j
umper.
L1075 203 Obsolete
. McQua
y
lo
g
o; part no. 073318601; Premier
White® color; °F/°C scaleplate; includes AAF insert.
See OEM for
replacement.
T874N
Heat pump model; 2-sta
g
e heat; 1-sta
g
e cool plus
chan
g
eover; chan
g
eover in heat mode.
N1008 178 Obsolete. Williamson lo
g
o; used with Q674F1196; used
in Y594N1007.
T874N1016
N1016 178 Hone
y
well Heat Pump Thermostat lo
g
o; used with
Q674F1220.
T874N1016
N1024 179,
217
Bard lo
g
o; H1 and C1 anticipation fixed; used with
Q674F1261.
None See subbase description for
replacement information.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.