Honeywell T874 Product Data page 91

Model Fig.
Number No.
G1617 73 Obsolete. Carrier part no. 50QE90020101; contains
T874G1949 and Q674C1504.
G1625 160 York Canada part no. 2TH11702524; contains
T874G1964 and Q674J1266.
G1633 169 TRADELINE; contains T874G1972 and
Q674F1584; direct replacement for Y594G1377
(T874G1576/Q674F1402) Evcon/Coleman part no.
3600-373.
G1641 169 Obsolete. Amana part no. 10636703; contains
T874G1980 and Q674F1600.
G1658 155 Obsolete. Tempstar "Inter-City Products" part no.
1149910; contains T874G1998 and Q674F1212.
G1666 103 Obsolete. TRADELINE; manual changeover;
contains T874G2004 and Q674L1892; direct
replacement for Y507J1011 (T874G1055/
Q674L1041) Carrier part no. 99TZ90041106
(HH07AT171/HH93AZ1750).
G1674 161 TRADELINE; automatic changeover; contains
T874G2004 and Q674J1274; direct replacement
Y507J1003 (T874G1055/Q674J1035) Carrier part
no. 99TZ90040106 (HH07AT171/HH93AZ173).
G1716 155 WaterFurnace logo; part no. TA21H03; contains
T874G2046 and Q674F1667.
Y594H
H1004 79 Obsolete. LSI part no. 73033901; contains
T874H1039 and Q674C1124.
H1012 164 Contains T874H1062 and Q674C1249; replaces
T874H1005/Q674C1041.
H1020 177 Obsolete. Mammoth part no. 71117101; contains
T874H1096 and Q674C1330.
H1038 74 Obsolete. Carrier part no. 50QE90019101; contains
T874H1161 and Q674C1496.
H1046 172 Obsolete. Carrier part no. 50QE90026101; contains
T874H1153 and Q674B1406.
H1053 173 Obsolete. Carrier part no. 50QE90027101; contains
T874H1153 and Q674C1322.
Y594J
J1001 241 Obsolete. TRADELINE; manual changeover;
contains T874J1069 and Q674L1900; direct
replacement for T874J1002 or T874A1028 used
with Q674L1074 or Q674L1637 (HH07AT175 or
HH07AT165 used with HH93AZ186 or
HH93AZ195).
Both the thermostat and subbase must be replaced.
a
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
Table 10. Y594 Cross Reference.
Description
91
Trade Model
Replacement a
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y, L=R, R=none;
R-L jumper required; no night
setback.
T8600D2028 Wiring differences (old=new):
(programmable) Y1=O, Y2=Y, L=R; W-Y jumper
required; night setback.
Replacement has °F
Y594G1567 a
scaleplate.
Y594G1633
a
Y594G1633 Wiring differences (old=new):
W3=W2.
Y594G1252
Y594G1674 Replacement has auto
changeover.
Y594G1674
Y594G1716
T8600D2028 H2 is night setback.
Y594H1012
Y594H1012 Wiring differences (old=new):
R1=R, R2=L; use jumper
provided.
Wiring differences (old=new):
Y594H1012 a
X1=O, Y2=Y; L-R jumper
required.
T874A1130/ Wiring differences (old=new):
Y=Y1; W1-Y1 jumper required;
Q674B1075 a
replacement has no LEDs.
Wiring differences (old=new):
Y594H1012
a
Z=X.
(Recontrol)
T8511G1021
Remarks
60-2485—8