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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—852
C1877 53 Obsolete. Hone
y
well lo
g
o; TRADELINE model; used
with Q674B1554; used in Y594C1421.
Y594D1347 Jumper RC-RH; s
y
stem
switch: OFF-HEAT-AUTO-
COOL
T874D
2-sta
g
e heat, 2-sta
g
e cool.
D1009 166, 82 Obsolete
. Hone
y
well lo
g
o; used with Q674F1337,
E1007; used in Y594D1222, D1339.
T874D1165
D1017 44, 88 Obsolete
. Hone
y
well lo
g
o; TRADELINE model; includes
Allen wrench and screws to lock cover; used with
Q674A-G and Q674E1155.
T874D1165
D1025 44 Obsolete
. Westin
g
house lo
g
o; H1 anticipator factor
y
set
at 0.75A; H2 anticipator factor
y
set at 1.2A.
T874D1165
D1033 44 Lennox lo
g
o; part no. 13F0601; °F/°C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1041 53 York lo
g
o; part no. 2TH04701524A; used with
Q674B1125.
T874D1165
D1058 44 Obsolete
. Shi
g
er special. T874D1165
D1066 44 Obsolete
. ITT lo
g
o. T874D1165
D1074 51, 53,
146
Carrier lo
g
o; part no. HH07AT172; used with
Q674F1030
(
HH93AZ174
)
, F1063
(
HH93AZ181
)
or
Q674B.
T874D1165
a
Set H1 anticipator for current
draw of fan and sta
g
e 1 heat
primar
y
.
D1082 44, 46,
48, 72
Trane lo
g
o; used with Q674B1018, C1009, B1075,
B1133; used in Y594D1024, D1040.
T874D1165
D1090 44 Obsolete
. Dunham-Bush lo
g
o. T874D1165
D1108 44 Obsolete. Westin
g
house lo
g
o. T874D1165
D1116 76, 89,
94
Obsolete. Comfortmaker lo
g
o; part no. 1505-682; °F/°C
scaleplate; used with Q674C1116, E1197, G1104.
T874D1165 Replacement has °F
scaleplate.
D1124 44 Obsolete
. Airtemp special. T874D1165
D1132 44 Hone
y
well lo
g
o; °C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1140 44 Obsolete
. Solaron special. T874D1165 Replacement has °F
scaleplate.
D1157 51, 53,
146
Carrier lo
g
o; part no. HH07AT172; °C scaleplate; used
with Q674B or Q674F1030, F1063.
T874D1165
a
Replacement has °F
scaleplate; set H1 anticipator
for current draw of fan and
sta
g
e 1 heat primar
y
.
D1165 82 Hone
y
well lo
g
o; SUPER TRADELINE® model; includes
Allen wrench and screws to lock cover, field-ad
j
ustable
ran
g
e stops, field-ad
j
ustable lockin
g
levers.
T874D1165
D1173 51, 53 Trane lo
g
o; part no. BAY28X183; heat anticipator factor
y
set at 0.4A.
T874D1165
a
Set H1 anticipator for current
draw of fan and sta
g
e 1 heat
primar
y
.
D1181 51, 53 Obsolete. General Electric lo
g
o; lockin
g
cover includes
Allen wrench and screws to lock cover and ran
g
e stops
set at 72°F
(
max. heat
)
and 78°F
(
min. cool
)
.
T874D1165
a
Set H1 anticipator for current
draw of fan and sta
g
e 1 heat
primar
y
.
D1199 44 Obsolete. Lennox lo
g
o; part no. 13F0701; °C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1207 114 Obsolete
. Lennox lo
g
o; part no. 24F5201; used with
Q674L1199 and C815A1013 or Q674L1389.
T8611M2025
(
pro
g
rammable
)
Wirin
g
differences
(
old=new
)
:
V-VR=R, Y=W3, X=C, R=O,
M=Y, M2=Y2-W2, F=G;
j
umper Y2-W2; no outdoor
reset needed; use onl
y
one
s
y
stem transformer.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.