4
d. New or additional wires may be needed to accommo-
date added humidity outputs.
e. Discard or recycle old control.
3. Remove mounting plate from back of thermostat display
module by pressing the two tabs on the bottom edge and
pulling away. See Fig. 1. Figure 2 shows the mounting
plate removed from the module.
4. Route wires through large hole in mounting base. Level
mounting base against wall (for aesthetic purposes only
— the display module does not need be leveled for
proper operation) and mark wall through 2 mounting
holes. See Fig. 3.
5. Drill two 3/16-in. mounting holes in wall where marked.
Control may be mounted to a standard junction box, if
desired. Hole pattern on control mounting base matches
junction box mounting holes.
!
CAUTION
UNIT DAMAGE AND SAFETY HAZARD
Failure to follow this caution may damage equipment.
Improper wiring or installation may damage the thermo-
stat. Check to make sure wiring is correct before
proceeding with installation or turning on unit.
6. Secure rear plastic mounting base to wall with 2 screws
and anchors provided. Additional mounting holes are
available for more secure mounting if needed. Make sure
all wires extend through hole in mounting base.
7. Adjust length and routing of each wire to reach proper
connector block and terminal on mounting base with 1/4-
in. extra wire.
8. Connect two wires from the equipment control module to
the display module mounting base, being careful not to
over-tighten the screws. Correct polarity must be
observed when connecting the two wires. If wires are
connected incorrectly, the display module will not
operate.
See Fig. 4 and 5.
9. Connect red wire of the pigtail to V+ RED terminal.
Connect black wire of the pigtail to Vg BLACK terminal.
NOTE: The 2-wire pigtail is not intended to support the
weight of the thermostat. Do not hang the thermostat
from the equipment control module screw terminals.
10. Push any excess wire into wall and against mounting
base. Seal hole in wall to prevent air leaks. Leaks can
affect operation and cause incorrect temperature and/or
humidity measurement.
11. Attach 2-wire pigtail to display module. Pigtail is packed
loose in the box from the factory. Pigtail is attached to
the back of the display module via 2-pin, keyed connec-
tor.
12. Reattach display module body to mounting base by first
setting the module on at top of mounting base and then
snapping the bottom corners of display module into
place. See Fig. 6.
