4. Remove thermostat cover and place base against wall in a
near level position. Fasten to wall by driving 2 of the screws
provided with thermostat through slots in center of base and
into wall. (See Fig. 22.)
5. Remove and discard foam shipping pad from inside ther-
mostat.
CAUTION:
Failure to remove foam shipping pad will
damage thermostat.
6. Level thermostat with a level. (See Fig. 23.) Tighten 2
mounting screws then drive 2 remaining screws through
holes in upper corners of base and into wall. (See Fig. 23.)
NOTE:
Thermostat must be level for proper unit operation.
7. Set thermostat heat anticipator to appropriate value based
on the heater size for unit being installed. (See Fig. 24 and
Table 7.)
8. Replace thermostat cover by hooking tabs on top lip of
cover into slots in top retaining post and swinging cover
down until it snaps over lower retaining post.
9. Set outdoor thermostat to 50°F.
NOTE:
Refer to Installation Instructions packaged with thermo-
stat for additional information.
ELECTRONIC HEAT PUMP THERMOSTATS
(PROGRAMMABLE AND NON-PROGRAMMABLE)
1. Install Outdoor Temperature Sensor. Follow Installation
Instructions included with sensor and route wires through
hole in wall along with thermostat cable.
2. Open thermostat rear door (mounting base) to expose
mounting holes. The base can be removed to simplify
mounting. Snap apart carefully at hinge to separate mount-
ing base from remainder of thermostat.
3. Route thermostat wires through large hole in mounting
base.
4. Level mounting base against wall and mark wall through 2
mounting holes.
5. Drill two 3/16-in. mounting holes in wall where marked.
6. Secure mounting base to wall with 2 screws and anchors
provided, making sure all wires extend through mounting
base.
7. Adjust wire length and routing to allow proper closure of
thermostat. Strip each wire end no more than 1/4-in. to
prevent adjacent wires from shorting together. Match and
connect equipment lead wire to correct terminals of the
thermostat connector. (See Fig. 25 and 26.)
NOTE:
All TSTAT models have no batteries and are not "power
stealing." They do require 24 vac (R and C terminals) to be
connected for proper operation. Thermostat will not operate
without these 2 connections.
8. Push excess wiring into wall. Seal hole in wall to prevent
drafts.
9. Snap hinge back together.
10. Turn on power to unit.
11. Reconfigure thermostat to allow thermostat and outdoor
temperature sensor to control electric heat lockout.
This configuration allows lockout of any W (Electric Heat)
when outdoor temperature is above a selected value. Tem-
peratures of 15° to 55°F (or equivalent values in °C) can be
selected. Feature can be enabled or disabled. EMER-
GENCY HEAT mode disables this feature. Factory default
is OFF (disabled.)
To enable feature and set temperature value proceed as
follows:
a. Non-Programmable Model
(1.) Enter thermostat configuration mode by pressing
and holding FAN button for approximately 10 sec.
The room temperature disappears and display
should read "1-." Thermostat is now in configura-
tion mode.
Fig. 22—Thermostat Mounting Screw Location
A95373
MOUNTING HOLE
MOUNTING HOLE
Fig. 23—Leveling Thermostat
A95356
80
70
60
50
80
70
60
50
ON
AUTO
FAN
COOL
OFF
HEAT
EM HEAT
TABLE 7—HEAT ANTICIPATOR VALUES FOR
HEAT PUMP UNITS
HEATER SIZE (KW)
ANTICIPATOR SETTING
0
N/A
5
0.35
10
0.35
15
0.70
20
0.70
N/A—Not Applicable
Fig. 24—Setting Heat Anticipator
A95357
COOL
COOL
HEAT
EM HEAT
LONGER
1.2 .8.6 .4
.2
.3
.15
.12
.10
HEAT ANTICIPATOR INDICATOR
—11—
