Honeywell T874 - Page 59

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
59 60-2485—8
G1204 162 Honeywell logo; designed for use on Trane heat pumps;
no H2 anticipation; changeover in cooling mode; used
with Q674J1043 and C815A1005; used in Y594G1161.
Y594G1161
a
Designed for use on Trane
heat pumps.
G1212 155 Obsolete
. Honeywell logo; H2 anticipator factory set at
0.2A; changeover in cooling mode; includes shunt to
bypass H2 anticipator with W3 heat relays; used with
Q674F1238.
Y594G1252
a
G1220 235 Obsolete. Rheem logo; part no. RXMT-C71; changeover
in cooling mode; used with Q674F1238.
Y594G1252
a
G1238 155 Obsolete. Ruud logo; part no. UXMT-C71; changeover
in cooling mode; used with Q674F1238.
Y594G1252
a
G1246 Obsolete. Honeywell logo; changeover in cooling mode.
155 Used with Q674F1212; used in Y594G1195, G1252,
G1369.
Y594G1252
a
170 Used with Q674F1410; used in Y594G1393.
Y594G1393
a
G1261 58, 157 Obsolete. Borg-Warner; used with Q674D1032, F1253. None See subbase description for
replacement information.
G1279 58, 157 Obsolete
. Bryant logo; used with Q674D1032, F1253. None See subbase description for
replacement information.
G1287 58, 157 Obsolete
. Wesco logo; used with Q674D1032, F1253. None See subbase description for
replacement information.
G1295 58 Obsolete
. York logo; part no. 2TH11702724A; used with
Q674D1032.
T874D1165/
Q674D1040
Wiring differences (old=new):
Y=Y2, O=Y1, W=W2; jumper
W1-Y2.
G1345 160 Obsolete
. York logo; part no. 2TH11702624A; °C
scaleplate; used with Q674J1027.
Y594G1575
a
G1352 73 Obsolete. Command-Aire logo; 12°F differential
between H1 and H2 for night setback; used with
Q674C1066.
Y594H1012
a
Wiring differences (old=new):
Y1=O, Y2=Y, L=R, R=none; R-
L jumper required; no night
setback.
T8600D1004
(programmable)
Wiring differences (old=new):
Y1=O, Y2=Y, L=RH; RC-RH
jumper required; includes
night setback.
G1378 79 Obsolete
. Mammoth logo; H2 anticipator factory set at
0.8A; 12°F differential between H1 and H2 for night
setback; °F/°C scaleplate; used with Q674C1124; used
in Y594G1294.
Y594H1012
a
Wiring differences (old=new):
R1=none, R2=L; R-L jumper
required; no night setback.
T8090A1007/
Q682A1038
a
(programmable)
Includes night setback; W-Y
jumper required.
G1402 129 Obsolete
. York part no. 2TH11702824A; meets DoD
specifications; used with Q674L1363.
Y594R1425
a
Wiring differences (old=new):
W=W2, X=E, B=X; jumper
Y-W1.
G1410 155 Obsolete
. Borg-Warner multi-logo; part
no. 6TH11703024A; used with Q674F1311.
T874G1246
a
or
Y594G1252
a
G1428 160 Obsolete. Borg-Warner multi-logo; part no.
6TH11702424A; used with Q674J1027; used in
Y594G1229.
Y594G1567
a
G1436 58 Obsolete. Borg-Warner multi-logo; part no.
6TH11702724A.
T874D1165/
Q674D1040
Wiring differences (old=new):
Y=Y2, O=Y1, W=W2; jumper
W1-Y2.
Table 8. T874 Cross Reference.
Model
Number
Fig.
No. Description
Trade Model
Replacement Remarks
a
Both the thermostat and subbase must be replaced.