Honeywell Q682B Installation Instructions Manual page 4

W ire Wallplate or Subbase
Follow the instructions provided by the heating, cool­
ing, or heating/cooling equipment manufacturer. If not
available, refer to the Typical Wiring Diagrams section at
the end of this publication.
Disconnect the power supply before making wiring
connections to prevent electrical shock or equipment dam­
age.
NOTE: All wiring must comply with local electrical codes
and ordinances.
This thermostat clock can be powered by a 24 Vac trans­
former with battery backup, 24 Vac transformer only or
battery only, or through the control system. Refer to Figs.
15 through 18 for hookup diagrams of typical powering
applications.
FOR WALLPLATE (Heating or Cooling Systems)
Refer to Fig. 5 and strip the thermostat wire insulation as
necessary.
For heating-only systems, connect wires to R, W, and C
(if applicable) terminals. For cooling-only systems, con­
nect wires R, Y, and C (if applicable) terminals. Firmly
tighten the screws (Fig. 19).
Push excess wire back into the wall.
Plug the hole in the wall with nonhardening caulk, putty,
or nonflammable insulation to prevent drafts from affect­
ing thermostat operation.
SUBBASE (Heating/Cooling Systems)
Refer to Fig. 5 and strip the thermostat wire insulation as
necessary.
Fig 5— Methods of connecting terminals.
FOR STRAIGHT
CONNECTION—
Subbase Terminal
R
R c
R h
W
Y
G
C
O
B
P
69-0627B — 1
TABLE 2—TERMINAL DESIGNATIONS.
Control transformer power.
Line side of 24V power supply; cooling side, 2 transformer heat/cool system.
Line side of 24V power supply; heating side, 2 transformer heat/cool system.
Heating control circuit.
Cooling control circuit; jumper to W for heat pump compressor control if no
P terminal on subbase.
Fan control circuit.
Clock control (transformer common).
Cooling damper or changeover/reversing valve, makes continuously in cool.
Heating damper or changeover/reversing valve, makes continuously in heat.
Heat pump contactor; P terminal on some models only.
4
Connect the wires to the corresponding terminals on the
subbase. If labels do not agree with your new subbase, refer
to Table 2 and the installation instructions furnished with
the subbase.
NOTE: Ifwiring a dual transformer system, only the O or the
B terminal may be used.
Push excess wire back into the wall.
Plug the hole in wall with nonhardening caulk, putty, or
nonflammable insulation to prevent drafts from affecting
the thermostat operation.
Mount the Thermostat
Note the tabs on the top inside edge of the thermostat
base. These tabs fit the slots molded into the top of the
wallplate or subbase.
Hang the thermostat base on the wallplate or subbase.
Insert the two captive mounting screws located in the
bottom corners of the base (Fig. 6).
Firmly tighten the screws.
Fig. 6— Thermostat mounting.
Control Function