4
W A T E R - S O U R C E H E A T P U M P S
ATA11U03
R e v. : 0 9 / 1 6 / 1 3
Installation -
To install the thermostat, perform the
following procedure:
1. Turn off all power to equipment.
Installation
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CAUTION!
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ENVIRONMENTAL HAZARD!
Failure to follow this
caution may result in environmental damage. Mercury is a
hazardous waste. Federal regulations require that mercury
be disposed of properly.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from wall.
b. Record the wire color and old termi nal marking.
c. Disconnect wires from existing thermostat, one
at a time. Be careful not to allow wires to fall back
into the wall.
d. Recycle old thermostats that contain Mercury.
Figure 2: Backplate Mounting
2.A
New Installation -
a. Optional - install 2x4 box horizontal.
b. Run new wiring, must meet all NEC and local
codes.
c. Note each wire color and connection at unit.
3. Press the thumb release at the top of the thermostat
and pull apart carefully to separate back-plate from
the thermostat.
4. Pull thermostat wires through large hole in
backplate. Level back-plate against wall (for
appearance only, the thermostat does not need be
leveled for proper operation) and mark wall through
two mounting holes. See Fig. 2.
5. For direct mounting to wall, drill two 3/16-in.
mounting holes in the wall where marked, use
anchors provided.
6. Secure backplate to box or wall with two screws
provided. Make sure all wires extend through hole in
backplate.
7. Adjust length and routing of each wire to reach
proper connector block and terminal on backplate
with 1/4-in. (6 mm) of extra wire. Strip only 1/4-in. of
insulation from each wire to prevent adjacent wires
from shorting together when connected.
8. Match and connect equipment wires to proper
terminals of the connector blocks (see Fig. 3).
9. Push any excess wire into wall and against backplate.
Seal hole in wall to prevent air leaks. Leaks can affect
operation.
10. Attach thermostat to backplate by inserting tab on
bottom edge and hinging up until top snap secures.
11. Turn ON power to unit.
When power is applied, all display icons are lit for 2
seconds to test the display. Following this, the equipment
type for which the thermostat is configured is displayed
for an additional 2 seconds.
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CAUTION!
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Failure to follow this caution may result in equipment
damage or improper operation. Improper wiring or
installation may damage the thermostat. Check to make
sure wiring is correct before proceeding with installation or
turning on unit.
Figure 3: Terminal Strip (wiring diagram - see figure 7)
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WARNING!
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WARNING!
Electrical shock can cause personal injury and
death. Before installing thermostat, shut off all power to
this equipment during installation. There may be more than
one power disconnect. Tag all disconnect loca tions to alert
others not to restore power until work is completed.
