TP970 SERIES CONVERTASTAT
®
KITS
Thermostat Cover Mounting
1. Remove caution card from cover.
2. Select correct window (vertical or horizontal/single,
dual, or blank).
3. Peel release liner from window back (see Fig. 7).
NOTE: Ensure window orientation is correct.
When viewed from front of cover, setpoint
and Day/Auto openings are on either the
bottom (vertical thermostat) or the right
(horizontal thermostat). The cover has
slots which must mate with backplate
mounting ears (see Fig. 5).
CAUTION
Equipment Damage Hazard.
Once assembled, disassembly can damage
the window.
Before installing window, remove card, check
window selection and orientation to cover. The
setpoint, Day/Auto openings and/or inserts must
be down or to the right.
4. Mount cover. Hook two slots on cover bottom (right
end for horizontal mounting) to backplate ears.
Swing cover into place and back out (counterclock
wise) setscrews with thermostat tool or 0.05-inch
Allen wrench to secure.
6 0
7 0
80
9 0
6 0
7 0
8 0
9 0
SETSREW HOLES (4)
(USE HOLES CLOSEST
TO THE WALL)
WINDOW
(DUAL SHOWN,
PARTIALLY
INSTALLED)
C7256
Fig. 7. Assembly of Cover with
Window Frame and Insert.
CHECKOUT AND TESTING
Equipment Required
The following equipment is available from your
Serviceline Supplier:
— Gage 305965 or 40002576-001, 0 to 30 psi (0-210 kPa).
— CCT729 Gage Adapter.
— CCT735A Thermostat Tool.
NOTE:
Before making adjustments, set thermostat desired
setpoint and let system operate long enough to
stabilize. Ensure that the system is stable before
checking calibration. All thermostats are accurately
factory calibrated and should require only a
calibration check to ensure correct operation.
Throttling Range
Thermostat throttling range (TR) is factory set at 4
°
F
(2.2 K) and should not require any change under normal
operating conditions. If a change is necessary, use
following procedures to reset throttling range to values
specified on job drawings.
NOTE: Changing throttling range requires recalibration.
1. Remove cover and install 0 to 30 psi (0 to 210 kPa)
gage (with gage adapter) in gage tap (Fig. 8).
2. Slide throttling range adjustment to desired
position on throttling range scale.
3. Mechanically check TR by moving setpoint adjust
ment until branch line pressure is 3 psi (21 kPa);
note setpoint indicator setting.
4. Move setpoint adjustment until branch line
pressure is 13 psi (90 kPa) and note setpoint
indicator setting. The difference in setpoint
indicator settings is the actual throttling range.
NOTE: The ambient temperature ±1/2 of the
throttling range must not exceed minimum
or maximum thermostat setpoints.
RESULT: With a 6
°
F (3.3 K) throttling range and an
ambient temperature of 62
°
F (16
°
C), this
procedure will not work for a TP970A
which has a 60
°
F (15
°
C) minimum
setpoint.
5. Recalibrate using procedures in Recalibration
section.
DA
DA
60
70
80
90
SETPOINT DIAL
(NITE/WINTER)
THERMOMETER
CALIBRATION
BOBBIN
SETPOINT
INDICATOR
(NITE/WINTER)
SETPOINT INDICATOR
CALIBRATION SCREW
(DAY/SUMMER)
DAY/AUTO LEVER
(TP971 ONLY)
SETPOINT ADJUSTMENT
SCALEPLATE
THROTTLING
RANGE SCALE
(DAY/SUMMER)
THROTTLING
PLATE (2)
GAUGE TAP
NOTE: NOT ALL ADJUSTMENTS
ARE ON ALL THERMOSTATS.
TEMPERATURE INDICATOR
SETPOINT LIMIT STOPS
CALIBRATION SCREW
(NITE/WINTER)
SETPOINT LOCK SCREW
THROTTLING RANGE
ADJUSTMENT
(NITE/WINTER)
DA
MIN
10
F
8
6
4
2
M17442
Fig. 8. TP971 and TP972 Controls and Indicators,
Front View with Cover Removed.
Setpoint Limit Adjustment
To set minimum or maximum setpoint limits:
1. Loosen setpoint lockscrew (Fig. 8).
2. Move each stop to desired position.
3. Tighten setpoint lockscrew.
4. Check positioning of stops by changing setpoint.
85-0210EF—1
4
