Honeywell TROL-A-TEMP Q674B Installation Instructions Manual

These T874A,D Zone Thermostats and Q674B,D,E
Subbases provide 24 to 30 Vac temperature control in
Honeywell Trol-A-Temp heating/cooling zone systems.
TABLE 1—THERMOSTAT/SUBBASE AND SYSTEM COMPATIBILITY.
Thermostat/
Subbase Model
a
Number
T874A/Q674B Zone 1; conventional
heat-cool.
T874A/Q674D Zones other than zone 1;
conventional heat-cool.
T874A/Q674E Not applicable
T874D/Q674B Not applicable
T874D/Q674D Not applicable
T874D/Q674E Not applicable
a
Subbase not included with thermostat; order separately.
Thermostat/Subbase
a
Order Number
T874A1465/Q674B1471 HEAT-OFF-COOL
T874A1465/Q674D1123 None
T874A1465/Q674E1379 HEAT-OFF-COOL-AUTO ON-AUTO
T874D1801/Q674B1463 HEAT-OFF-COOL
T874D1827/Q674B1471 HEAT-OFF-COOL
T874D1801/Q674D1115 None
T874D1827/Q674D1123 None
T874D1827/Q674E1379 HEAT-OFF-COOL-AUTO ON-AUTO
a
Subbase not included with thermostat; order separately.
On a 2-heat thermostat, the two stages of heat make
sequentially as the temperature drops. Make refers to the
mercury switch initiating a call for heat or cool.
There are about 2° F [1° C] between stages so that the
second stage makes only when the first stage cannot
handle the load. This is the interstage differential.
T874A,D Zone Thermostats/
Installation Instructions for the Trained Service Technician.
Application
Mini-Zone Mabs II, Mabs II-L
Zone 1; conventional
heat-cool.
Zones other than zone 1;
conventional heat-cool.
Not applicable
Zone 1; conventional
heat-cool.
Zones other than zone 1;
conventional heat-cool
and heat pump.
Not applicable
TABLE 2—THERMOSTAT/SUBBASE SPECIFICATIONS.
Switching
System

Operation

S. M. • Rev. 6-93 •
Q674B,D,E Subbases
See Table 1 for thermostat/subbase and system compatibil-
ity; see Table 2 for thermostat specifications. For complete
Honeywell Trol-A-Temp System specification and appli-
cation information, refer to the system specification in-
cluded with the control panel.
Application
Any zone; conventional heat-cool. Single-stage
Not applicable
Any zone; conventional heat-cool. Single-stage
Any zone; conventional heat-cool. Multistage
Not applicable
Any zone; conventional heat-cool. Multistage
Thermostat/
Subbase
Fan Color
ON-AUTO White/Gray
None White/Gray
White/Gray
ON-AUTO Beige/Brown
ON-AUTO White/Gray
None Beige/Brown
None White/Gray
White/Gray
This control contains mercury in a sealed tube. Do not
place control in the trash at the end of its useful life.
If this control is replacing a control that contains mercury
in a sealed tube, do not place your old control in the trash.
Contact your local waste management authority for
instructions regarding recycling and the proper disposal of
this control, or of an old control containing mercury in a
sealed tube.
If you have questions, call Honeywell at 1-800-468-1502.
• ©Honeywell Inc. 1993 • Form Number 69-0580—2
M3375
Mabs XX
Anticipator Range (A)
Heating
(Adj.)
Stg. 1—
0.1 to 1.2
Stg. 1—
0.1 to 1.2;
Stg. 2—
0.1 to 1.0.
Recycling Notice
M3375
Stages
Single-stage
Multistage
Cooling
(Fixed)
Stg. 1—
0 to 1.5
Stg. 1—
0 to 1.2;
Stg. 2—
0 to 1.0.