Honeywell Q674J- User Manual
Honeywell Q674J– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – IMPORTANT: Thermostats are calibrated at the factory by; LOCATION; Recycling Notice; WHEN INSTALLING THIS PRODUCT...; CAUTION; Operation; interstage differential.
- Page 3 – cable for proper wiring.; WIRING THE SUBBASE
- Page 8 – MOUNTING THE THERMOSTAT; Setting; SETTING THE HEAT ANTICIPATOR
- Page 9 – Checkout; Calibration
T874G Thermostats
and Q674F,J Subbases
for Heat Pump Systems
J.H. • Rev. 7-94 • • ©Honeywell Inc. 1994 • Form Number 69-0435—10
TRADELINE
®
TABLE 1—THERMOSTAT/SUBBASE SPECIFICATIONS.
Application
The T874G Thermostats and Q674F,J Subbases pro-
vide 24 to 30 Vac control of 2-stage heating and 1-stage cool-
ing heat pump systems with automatic changeover. Stage 1
heat and cool anticipation is fixed voltage type; stage 2 heat
anticipation is adjustable (except as noted). See Table 1 for
specific T874G/Q674F,J combinations and specifications.
Installation Instructions for the Trained Service Technician.
Thermostat/
Subbase
Thermostat/
Subbase
Model
LED
Switching
See
Package
Numbers
Indication
System
Fan
Changeover
Comments
Fig.
Y594G1252
T874G1246/
Q674F1212
AUX.HT.,
EM.HT.
a
EM.HT.-OFF-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO,
COOL
TRADELINE
®
5
—
T874G1246/
Q674F1410
AUX.HT.,
EM.HT.
a
EM.HT.
b
-OFF-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO,
COOL
Separate W1 and Y1
terminals; TRADELINE
®
subbase.
6
Y594G1419
T874G1642/
Q674F1444
AUX.HT.,
EM.HT.,
CHECK
OFF-EM.HT.-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO,
HEAT OR
COOL
SUPER TRADELINE
®
;
includes factory-installed
jumper across W1 and Y1;
fixed stage 2 heat anticipation.
7
Y594G1476
c
T874G1741/
Q674F1477
Isolated CHECK LED
includes jumper for connecting
X2 terminal to X or R for
power.
Y594G1534
d
T874G1824/
Q674F1477
Y594G1526
T874G1626/
Q674F1436
AUX.HT.,
EM.HT.
OFF-EM.HT.-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO,
HEAT
TRADELINE
®
8
—
T874D1165
or
T874E1016/
Q674F1543
(RED)
e
OFF-EM.HT.-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO
TRADELINE
®
subbase; exact
replacement for York model
no. 2TB04700524. Thermostat
not included; order separately.
9
Y594G1567
T874G1865/
Q674J1209
EM.HT.
EM.HT.-
AUTO-OFF
AUTO-
ON
AUTO,
COOL
TRADELINE
®
; exact
replacement for York model
nos. 2TH11702424 and
6TH11702424.
10
Y594G1575
c
T874G1873/
Q674J1225
EM.HT.
EM.HT.-
AUTO-OFF
AUTO-
ON
AUTO,
COOL
TRADELINE
®
; exact
replacement for York model
nos. 2TH11702424 and
6TH11702424.
10
Y594G1633
T874G1972/
Q674F1584
AUX.HT.,
EM.HT.
OFF-EM.HT.-
HEAT-AUTO-
COOL
AUTO-
ON
AUTO,
HEAT OR
COOL
TRADELINE
®
11
a
EM.HT. also shows compressor malfunction.
b
When switch is in EM. HT. position, the emergency heat will operate continuously until system switch is moved to another position.
c
Thermostat is white and subbase is gray.
d
Sold only in Australia; degrees C.
e
LED indicator is not labeled but may be connected per user's requirements. See Fig. 9.
M3375
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Summary
69-0435—10 2 IMPORTANT: Thermostats are calibrated at the factory by using subbases mounted at true level. Inaccurate sub-base leveling will cause thermostat control deviation. LOCATION Install the thermostat about 5 ft [1.5 m] above the floor in an area with good air circulation at averagetemperatu...
3 69-0435—10 Fig. 2—Installation of Q674 Subbase on wall. WIRES THROUGHWALL OPENING WALL WALLANCHORS(2) SUBBASE MOUNTINGHOLES MOUNTINGSCREWS (2) M926 Fig. 3—Subbase components and levelingprocedure. SPIRIT LEVEL MOUNTING HOLES (2) M927 TOP MOUNTING HOLES (2) WIRINGTERMINAL THERMOSTATCABLE OPENING TO...
69-0435—10 8 MOUNTING THE THERMOSTAT 1. Remove the thermostat cover by pulling the bot- tom edge of the cover away from the base until it snapsfree of the retaining posts. NOTE: The cover is hinged at the top and must be removed by pulling out at the bottom. 2. Carefully remove and discard the foam ...
