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T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
60-2485—8 52
C1877 53 Obsolete. Honeywell logo; TRADELINE model; used
with Q674B1554; used in Y594C1421.
Y594D1347 Jumper RC-RH; system
switch: OFF-HEAT-AUTO-
COOL
T874D 2-stage heat, 2-stage cool.
D1009 166, 82 Obsolete
. Honeywell logo; used with Q674F1337,
E1007; used in Y594D1222, D1339.
T874D1165
D1017 44, 88 Obsolete
. Honeywell logo; TRADELINE model; includes
Allen wrench and screws to lock cover; used with
Q674A-G and Q674E1155.
T874D1165
D1025 44 Obsolete
. Westinghouse logo; H1 anticipator factory set
at 0.75A; H2 anticipator factory set at 1.2A.
T874D1165
D1033 44 Lennox logo; part no. 13F0601; °F/°C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1041 53 York logo; part no. 2TH04701524A; used with
Q674B1125.
T874D1165
D1058 44 Obsolete. Shiger special. T874D1165
D1066 44 Obsolete. ITT logo. T874D1165
D1074 51, 53,
146
Carrier logo; part no. HH07AT172; used with
Q674F1030 (HH93AZ174), F1063 (HH93AZ181) or
Q674B.
T874D1165
a
Set H1 anticipator for current
draw of fan and stage 1 heat
primary.
D1082 44, 46,
48, 72
Trane logo; used with Q674B1018, C1009, B1075,
B1133; used in Y594D1024, D1040.
T874D1165
D1090 44 Obsolete
. Dunham-Bush logo. T874D1165
D1108 44 Obsolete
. Westinghouse logo. T874D1165
D1116 76, 89,
94
Obsolete
. Comfortmaker logo; 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 Honeywell logo; °C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1140 44 Obsolete
. Solaron special. T874D1165 Replacement has °F
scaleplate.
D1157 51, 53,
146
Carrier logo; 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
stage 1 heat primary.
D1165 82 Honeywell logo; SUPER TRADELINE® model; includes
Allen wrench and screws to lock cover, field-adjustable
range stops, field-adjustable locking levers.
T874D1165
D1173 51, 53 Trane logo; part no. BAY28X183; heat anticipator factory
set at 0.4A.
T874D1165
a
Set H1 anticipator for current
draw of fan and stage 1 heat
primary.
D1181 51, 53 Obsolete
. General Electric logo; locking cover includes
Allen wrench and screws to lock cover and range stops
set at 72°F (max. heat) and 78°F (min. cool).
T874D1165
a
Set H1 anticipator for current
draw of fan and stage 1 heat
primary.
D1199 44 Obsolete
. Lennox logo; part no. 13F0701; °C scaleplate. T874D1165 Replacement has °F
scaleplate.
D1207 114 Obsolete
. Lennox logo; part no. 24F5201; used with
Q674L1199 and C815A1013 or Q674L1389.
T8611M2025
(programmable)
Wiring differences (old=new):
V-VR=R, Y=W3, X=C, R=O,
M=Y, M2=Y2-W2, F=G;
jumper Y2-W2; no outdoor
reset needed; use only one
system transformer.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.