Honeywell T841A Installation Instructions Manual

APPLICATION
The T841A Heating-Cooling TRADELINE® Thermostat
provides 24 Vac control of two-stage heating and one-
stage cooling in heat pump systems, using manual
changeover. This thermostat provides SYSTEM switch
selections of EM. HEAT-HEAT-OFF-COOL and FAN
switch selections of AUTO-ON. See Fig. 1. See Table 1 for
T841A TRADELINE® specifications.
LED
OS Number Indication
T841A1308 EM. HEAT
AUX. HEAT
T841A1316
b
T841A1423 EM. HEAT,
AUX. HEAT,
d
CHECK
b,c
T841A1464
T841A1498 EM. HEAT
b
T841A1506
a EM. HEAT LED also indicates compressor malfunction.
b
Premier White® color.
c
Sold only in Australia: degrees C.
d CHECK LED indicates compressor malfunction.
FRONT OF DEVICE
EM. HEAT HEAT OFF COOL
CHECK
SYSTEM SWITCH
®U.S. Registered Trademark
Copyright © 1997 Honeywell Inc. •
Table 1. T841A TRADELINE® Specifications.
Changeover Anticipation
a
, Manual Cool Stage 2 fixed,
or Heat 0 to 1.5A
Stage 2
adjustable, 0.1
to 1.2A
Stage 2 fixed,
0 to 1.5A
80
80
70
70
60
60
50
50
FAN
AUTO ON
EM. HEAT AUX. HEAT
FAN SWITCH
Fig. 1. External view of T841A.
• All Rights Reserved
T841A Heating-Cooling
Heat Pump Thermostat
Test holes are provided on the front of the thermostat to
accommodate test meter probes without removing the
thermostat from the wall. Remove the cover of the
thermostat to expose the test holes, which are labeled to
correspond with the terminals on the back of the
thermostat.
Heat Terminal
Designations
G, R, W , E,
2
L, B, X, Y, O
G, R, E, L, X
W , B, W1,
2
Y , O
1
W , G, R, W ,
3 2
E, L, B, X, Y,
O
G, R, W, H, B,
X, O, Y
COVER
THERMOMETER
SET POINT
SCALE
LED (UP
TO THREE)
MOUNTING
HOLES (4)
X-XX UL
INSTALLATION INSTRUCTIONS
System
Remarks Switch
Use when E EM. HEAT,
and W are HEAT, OFF,
2
jumpered. COOL
Does not
replace
T841A1068.
Not for systems
with E to W
2
jumper
Exact
replacement for
York model no.
2TH11703324
BACK OF DEVICE
WIRING TERMINAL
(UP TO 12)
Auto Fan
in EM.
HEAT
No
Yes
M2960A
69-0452-8