Thermostat Cover Mounting; Checkout And Testing; Equipment Required; Throttling Range - Honeywell CONVERTASTAT TP970 Series Replacement Data

TP970 SERIES CONVERTASTAT

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.
7 0
6 0
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.
85-0210EF—1
®
KITS
SETSREW HOLES (4)
(USE HOLES CLOSEST
TO THE WALL)
WINDOW
(DUAL SHOWN,
PARTIALLY
INSTALLED)
9 0
8 0
C7256
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.
GAUGE TAP
THROTTLING
PLATE (2)
THROTTLING
RANGE SCALE
(DAY/SUMMER)
THERMOMETER
CALIBRATION
BOBBIN
TEMPERATURE INDICATOR
SCALEPLATE
SETPOINT INDICATOR
CALIBRATION SCREW
(NITE/WINTER)
SETPOINT LOCK SCREW
CALIBRATION SCREW
(DAY/SUMMER)
SETPOINT LIMIT STOPS
SETPOINT ADJUSTMENT
DAY/AUTO LEVER
(TP971 ONLY)
NOTE: NOT ALL ADJUSTMENTS
ARE ON ALL THERMOSTATS.
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.
4
THROTTLING RANGE
DA
ADJUSTMENT
(NITE/WINTER)
SETPOINT
INDICATOR
(NITE/WINTER)
MIN
60 70 80 90
SETPOINT DIAL
(NITE/WINTER)
F
10
8
6
4
2