TP970 and TP9600 Series
Pneumatic Thermostats
SERVICE DATA
TP973A,B and TP9630A,B
GENERAL
The TP973A, B and TP9630A,B are one- or two-pipe bleed-
type thermostats for heating or cooling applications.
The TP970 and TP9600 Series Pneumatic Thermostats are
one-, two-, or three-pipe, proportioning thermostats with
bimetal elements. They are suitable for controlling dampers
and/or valves in HVAC systems.
TP974A
The TP974A is a pneumatic space temperature sensor for
either one- or two-pipe applications. It is suitable as a remote
temperature indicator or as the sensor for a receiver
controller.
APPLICATION
TP970A-D and TP9600A,B
TP978A-E
The TP970 and TP9600 are single-temperature, pilot-bleed,
two-pipe thermostats. The TP970A and TP9600A are used for
heating (Direct Acting [DA]), the TP970B and the TP9600B for
cooling (Reverse Acting [RA]), and the TP970C and D for
heating/cooling. There are TP970A and B models with Limited
Control Range (LCR) for energy conservation. The TP970C
and D have a wide throttling range capability, allowing an
adjustable Zero Energy Band (ZEB) between heating and
cooling operations.
The TP978 is a dual-element bleed-type thermostat used in
dual one-pipe applications, suitable for use with variable
volume systems. These thermostats may be used to control
separate heating and cooling actuators in sequence, with a
Zero Energy Band (ZEB) for energy conservation. The
heating setpoint is limited to 73F (23C) maximum, and the
cooling setpoint is limited to 77F (25C) minimum. Heating and
cooling are available in both DA and RA configurations.
Except for the TP978E, there are no upgraded replacements
for the TP978.
TP971A-E and TP9610A,B
The TP971A-E and TP9610A,B are two-temperature, pilot-
bleed, two-pipe thermostats for DAY/NITE operation, with
automatic switchover from mainline pressure. The TP971C is
a three-pipe thermostat for unit ventilator DAY/NITE
application.
TP979A-E
The TP979 contains two cooling/heating, DAY/NITE
thermostats. They are one- or two-temperature, two-pipe
thermostats for independent proportioning control of heating
and cooling.
TP972A and TP9620A
The TP972A and TP9620A are single-temperature, pilot-
bleed, two-pipe thermostats with cooling/heating cycles and
automatic switchover from mainline pressure. The
TP972A2143 is designed specifically for replacing Johnson
cooling/heating thermostats (see SPECIFICATIONS section).
Contents
General ............................................................................... 1
Application .......................................................................... 1
Specifications ...................................................................... 2
Operation ............................................................................ 8
Maintenance ....................................................................... 11
General ............................................................................... 11
Cleaning .............................................................................. 11
Calibration ........................................................................... 12
Troubleshooting .................................................................. 14
Repair.................................................................................. 15
Parts and Accessories ........................................................ 18
Accessories......................................................................... 21
® U.S. Registered Trademark
75-7134-1
Copyright © 1997 Honeywell Inc.
•
All Rights Reserved
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 1. TP970A-D Thermostat Specifications (continued).*
Supply Air Degrees
Old
New
Pressure Throttling
Model No.
Model No.
Description
Setpoint
psi (kPa)
Range
Special Features
TP970B 1069
TP970B 1077
TP970B 2069
TP970B 2077
RA, 2-Pipe
60-90°F
18 (124)
Includes 25 ft (7.6m) Twin Tubing with
1400406-121 Cover
Adjustable
2-10°F
(1.1-5.6°C)
Convertastat Kit with Universal Window
Cover
—
TP970B 2085
TP970B 2093
TP970B 2101
TP970B 2119
TP970B 2127
TP970B 2135
TP970C 2000
Quick Mount with 14004407-300 Cover
Quick Mount with 14004407-121 Cover
Quick Mount with 14004407-111 Cover
Quick Mount with 14004406-300 Cover
Quick Mount with 14004406-121 Cover
Quick Mount with 14004406-111 Cover
—
—
—
—
—
TP970C 1000
DA, 2-Pipe
RA, 2-Pipe
Wide Throttle Range Allows Zero Energy
Band (ZEB)
Adjustable
5-25F
(2.8-13.9C)
TP970C 1018
TP970D 1008
TP970D 1016
No
Universal Zero Energy Band (ZEB)
Modernization Kit
Replacement
TP970D 2000
Wide Throttle Range Allows Zero Energy
Band (ZEB)
No
Universal Zero Energy Band (ZEB)
Modernization Kit
Replacement
*All single-temperature, pilot bleed.
Table 2. TP971A-E Thermostat Specifications.*
Supply Air
Pressure
psi (kPa)
Degrees
Throttling
Range
Old
Model No.
New
Model No.
Description
Setpoint
Special Features
TP971A 1003
TP971A 1011
TP971A 1029
TP971A 1037
TP971A 2003
TP971A 2011
TP971A 2029
TP971A 2037
DA, Heating,
2-Pipe
60-90°F
13 or 18
(90 or 124)
Adjustable
2-10°F
—
DAY Range
15-30°C
DAY Range
(1.1-5.6°C)
—
60-90°F
DAY Range
16 or 21
(110 or 145)
—
13 or 18, 16 or
Universal Modernization Kit
21 (90 or 124,
110 or 145)
Honeywell Thermostat Modernization Kit
with Universal Window Cover
TP971A 1052
TP971A 1060
TP971A 1078
TP971A 2052
TP971A 2060
15-30°C
16 or 21
(110 or 145)
—
DAY Range
60-90°F
DAY Range
Includes 14004406-901 Cover
—
No
60-90°F
50-75°F
13 or 18
(90 or 124)
Adjustable 5-
25°F (2.8-
Replacement
13.9°C)
DAY, 2-10°F
(1.1-5.6°C) NITE
TP971A 1086
TP971A 1094
TP971A 2086
TP971A 2094
60-90°F
20 or 25
Adjustable
—
DAY Range
(138 or 172)
2-10°F
(1.1-5.6°C)
Includes 25 ft (7.6m) Twin Tubing and
14004407-121 Cover
TP971A 1102
TP971A 2102
13 or 18, or 16
or 20 (90 or
124, or 110 or
145)
Convertastat Kit with Universal Window
Cover
*All DAY/NITE, two-temperature, pilot-bleed.
(continued)
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 2. TP971A-E Thermostat Specifications (continued).*
Supply Air
Pressure
psi (kPa)
Degrees
Throttling
Range
Old
Model No.
New
Model No.
Description
Setpoint
Special Features
—
TP971A 2110
DA, Heating,
2-Pipe
60-90°F
DAY Range
13 or 18
Adjustable 2-
10°F (1.1-5.6°C)
Quick Mount with 14004407-300 Cover
—
TP971A 2128
TP971A 2136
TP971A 2144
TP971A 2151
TP971A 2169
TP971B 2001
TP971B 2019
(90 or 124)
Quick Mount with 14004407-121 Cover
Quick Mount with 14004407-111 Cover
Quick Mount with 14004406-300 Cover
Quick Mount with 14004406-121 Cover
Quick Mount with 14004406-111 Cover
—
—
—
—
—
TP971B 1001
TP971B 1019
RA,
Heating,
2-Pipe
16 or 21
(110 or 145)
—
TP971B 1027
TP971B 1035
TP971B 2027
TP971B 2035
15-30°C
13 or 18
(90 or 124)
—
DAY Range
60-90°F
DAY Range
16 or 21
(110 or 145)
Includes 14004406-901 Cover
—
TP971B 1043
TP971B 1050
TP971B 2043
TP971B 2050
20 or 25
(138 or 172)
Includes 25 ft (7.6m) Twin Tubing with
14004407-121 Cover
TP971C 1009
TP971C 1017
TP971C 2009
TP971C 2017
DA,
13 or 18,
With Secondary Branch
Heating,
3-Pipe
15-30°C
DAY Range
(90 or 124)
TP971C 1025
TP971C 2025
DA,
Cooling,
60-90°F
DAY Range
16 or 21
(110 or 145)
TP971C 1041
TP971D 1007
TP971C 2041
TP971D 2007
3-Pipe
20 or 25
DA, Cooling,
2-Pipe
(138 or 172)
NITE Set-Up (75 to 100F)
TP971E 1004
TP971E 2004
RA, Cooling,
2-Pipe
13 or 18
(90 or 124)
*All DAY/NITE, two-temperature, pilot-bleed.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 3. TP972A Thermostat Specifications.*
Action
Left Right
Supply Air
Pressure
psi (kPa)
Degrees
Throttling
Range
Old
Model No.
New
Model No.
Bimetal Bimetal
Setpoint
60-90°F
15-30°C
60-90°F
Special Features
TP972A 1002
TP972A 1010
TP972A 1028
TP972A 2002
TP972A 2010
TP972A 2028
13 (Cooling) or
18 (Heating)
(90 or 124)
Adjustable
2-10°F
—
—
R.A.
D.A.
(1.1-5.6°C)
Universal Modernization Kit with Universal
Window Cover
TP972A 1036
TP972A 1044
TP972A 2036
TP972A 2044
60-90°F
Energy Conservation, Separate Setpoints
(Cooling)
(50-75°F
(Heating)
Honeywell Thermostat Modernization Kit
with Universal Window Cover
TP972A 1051 No Replacement
78-90°F
(Cooling)
60-72°F
(Heating)
Separately
Adjustable
2-10°F
Limited Control Range (LCR)
(1.1-5.6°C)
TP972A 1077 No Replacement
TP972A 1085 No Replacement
75-90°F
Setpoint Stop at 75F Minimum
(Cooling)
50-75°F
(Heating)
16 (Cooling) or
21 (Heating)
(110 or 145)
TP972A 1093 No Replacement
TP972A 1101 No Replacement
TP972A 1119 No Replacement
TP972A 1127 No Replacement
78-90°F
13 (Cooling) or
18 (Heating)
Limited Control Range (LCR)
(Cooling)
60-72°F
(Heating)
(90 or 124)
Universal Limited Control Range (LCR)
Modernization Kit
78-90°F
(Cooling)
13 (Cooling) or
18 (Heating)
Limited Control Range (LCR)
55-65°F
(Heating)
(90 or 124)
Universal Limited Control Range (LCR)
Modernization Kit
TP972A 1143
TP972A 1150
TP972A 1168
TP972A 1176
TP972A 1184
TP972A 2143
TP972A 2150
TP972A 2168
TP972A 2176
TP972A 2184
D.A.
R.A.
D.A.
D.A.
R.A.
60-90°F
14 (Heating) or
19 (Cooling)
(97 or 131)
Separately
Adjustable
2-10°F
Specifically for replacing Johnson
Cooling/Heating Thermostats
D.A. 15-30°C Cooling 13 (Cooling) or
(1.1-5.6°C)
Energy Conservation, Separate Setpoints
12-24 Heating
18 (Heating)
(90 or 124)
R.A.
R.A.
60-90°F
(Cooling)
50-75°F
16 (Cooling) or
21 (Heating)
110 or 145)
(Heating)
20 (Cooling) or
25 (Heating)
(138 or 172)
13 (Cooling or
18 (Heating)
Includes 14004406-901 Cover, Separate
Setpoints
—
—
TP972A 2192
TP972A 2200
R.A.
D.A.
D.A.
R.A.
60-90°F
(90 or 124)
Includes Universal Window Cover
—
14 (Cooling) or
19 (Heating)
(97 or 131)
*All single-temperature, tw0-pipe, two-element, automatic changeover, and cooling/heating.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 4. TP973A and B Thermostat Specifications.*
Supply Air
Pressure
psi (kPa)
Degrees
Throttling
Range
Old
Model No.
New
Model No.
Action
Setpoint
Special Features
TP973A 1068
TP973A 2068
DA
60-90°F
18 (124)
Universal Modernization Kit with Universal
Window Cover
Adjustable
2-10°F
(1.1-5.6°C)
TP973A 1076
TP973A 1084
TP973A 1092
TP973A 2076
TP973A 2084
TP973A 2092
—
—
15-30°C
60-90°F
Honeywell Thermostat Modernization Kit with
Universal Window Cover
TP973A 1100
TP973A 1117
TP973A 1126
TP973A 1134
TP973A 1142
TP973A 1159
TP973A 1167
TP973A 1175
TP973A 1183
TP973B 1066
TP973B 1074
TP973B 1090
TP973B 1108
TP973B 1116
TP973B 1124
TP973B 1132
TP973B 1140
TP973B 1157
TP973A 2100
No Replacement
No Replacement
No Replacement
No Replacement
TP973A 2159
TP973A 2167
TP973A 2175
TP973A 2183
TP973B 2066
TP973B 2074
TP973B 2090
TP973B 2108
TP973B 2116
TP973B 2124
TP973B 2132
TP973B 2140
TP973B 2157
Includes 14004406-901 Cover
Includes 25 ft (7.6m) Twin Tubing and
Blank Plastic Cover
—
Includes 14004407-121 Cover
Includes 14004407-300 Cover
—
RA
—
15-30°C
60-90°F
—
Includes 1400406-901 Cover
—
—
15-30°C
60-90°F
—
Includes 14004407-121 Cover
Includes 14004407-300 Cover
Includes 25 ft (7.6m) Twin Tubing and
14004407-121 Cover
*All one- or two-pipe, bleed type.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 5. TP974A, TP978A-E, TP979A-E Thermostat Specifications.
Supply Air Degrees
Old
New
Pressure Throttling
Model No.
Model No.
Action
DA, 1- or
2-Pipe Sensor
Bleed Type
Setpoint
psi (kPa)
Range
Special Features
TP974A 1000
TP974A 2000
50-100°F
18 (124)
—
Sensor for use with
RP908 & RP920
Controller
(10-38°C) 3-15 (21-103)
Range
Output
TP978A 1006
No
DA Heating
DA Cooling
60-73°F
Heating
18 (124)
2-10°F
ZEB Energy
Replacement
(1.1-5.6°C) Conservation, Setpoint
Stop 73°F (Heating),
77°F (Cooling)
TP978B 1004
TP978C 1002
TP978D 1000
TP978E 1007
No
RA heating
DA Cooling
77-90°F
Replacement
Cooling
No
DA Heating
RA Cooling
Replacement
No
RA Heating
RA Cooling
Replacement
TP978E 2007
RA (Right Side)
DA (Left Side)
68-82°F
60-90°F
0.18 (1)
18 (124)
1-4°F
Includes Cover
Special System-
Powered Thermostat
for Carrier
TP979A 1005
TP979A 2005
DA Heating
DA Cooling
Adjustable
2-10°F
(1.1-5.6°C)
—
TP979B 1003
TP979C 1001
TP979B 2003
TP979C 2001
RA Heating
RA Cooling
—
—
DA Heating or
Cooling
RA Heating or
Cooling
TP979D 1009
TP979E 1006
TP979D 2009
TP979E 2006
DA Heating
DA Cooling
13 (90) Day
18 (124) Nite
Day/Nite Heat with
night set down; Cool
with night set up.
DA Heating
RA Cooling
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 6. TP9600 Thermostat Specifications.
Model No.
Description
Setpoint Slot
Includes Stat.
Single Temperature, Two-Pipe:
TP9600A 1007
DA, Open Windows
RA, Open Windows
DA, Close Windows
RA, Close Windows
Open
Open
TP970A 2004
TP970B 2002
TP970A 2004
TP970B 2002
TP9600B 1006
TP9603A 1001
Closed
Closed
TP9603B 1000
Day/Night, Two-Pipe:
TP9610A 1006
DA, Open Windows
RA, Open Windows
DA, Close Windows
RA, Close Windows
Open
Open
TP971A 2003
TP971B 2001
TP971A 2003
TP971B 2001
TP9610B 1005
TP9613A 1000
Closed
Closed
TP9613B 1009
Heating/Cooling, Two-Pipe:
TP9620A 1005
DA, Open Windows
RA, Close Windows
Open
TP972A 2002
TP972B 2002
TP9623B 1009
Closed
Single Temperature, One or Two-Pipe:
TP9630A 1004
TP9630B 1003
TP9633A 1008
TP9633B 1007
DA, Open Windows
Open
Open
TP973A 2076
TP973B 2066
TP973A 2076
TP973B 2066
RA, Open Windows
DA, Close Windows
RA, Close Windows
Closed
Closed
Various ZEB ranges, heating control points, and cooling
control points are obtained by selecting the appropriate
thermostat setpoint, throttling range, and spring range or ratio
relays.
OPERATION
TP970A,B and TP9600A,B
When using a TP970A or TP9600A (Fig. 1) in heating
applications with a normally open valve, a fall in temperature
lowers Branchline Pressure (BLP) to the valve. THis lower
BLP provides proportional valve action matching the existing
load requirements. When a TP970B or TP9600B is used in a
cooling application, a rise in temperature causes the TP970B
or TP9600B to lower BLP. The energy conservation models
limit control temperature to a maximum (heating) or minimum
(cooling) of 72F (24C).
15
(100)
14
(90)
(80)
(70)
(60)
(50)
(40)
(30)
(20)
(10)
0
13
12
11
10
9
8
7
6
5
4
3
TP970C MINIMUM
THROTTLING RANGE =
5F (2.8C)
TP970C MAXIMUM
THROTTLING RANGE =
20F (11.1C)
SETPOINT
2.5 2.5
2
12.5 10 7.5
5
5
7.5
10 12.5 15
1
15
TP970A,B OR
TP9600A,B
(8) (7) (6) (5) (4) (3) (2) (1)
(1) (2) (3) (4) (5) (6) (7) (8)
ABOVE SETPOINT
M B
SETPOINT
BELOW SETPOINT
M
DEVIATION IN SPACE TEMPERATURE—DEGREES F (C)
C3536
Fig. 2. TP970C Space Temperature vs. Branchline
Pressure.
N.O.
SUPPLY
C3535-1
Fig. 1. TP970A,B and TP9600A,B Typical Operation.
TP970C and D
The TP970C and D with wide throttling range (Fig. 2 and 3)
allow use of heating and cooling valve assemblies with either
selected spring ranges (Fig. 4) or ratio relays (Fig. 5) to
achieve a ZEB range.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
15
14
13
12
11
10
9
8
7
6
5
TP971A, B, D, E and TP9610A,B
(100)
(90)
(80)
(70)
(60)
(50)
(40)
(30)
(20)
(10)
0
These thermostats provide a BLP proportional to the ambient
temperature. In a heating application with a normally open
valve (Fig. 6), a fall in room temperature causes the
thermostat to lower the BLP to the valve, providing a
proportional action matching the existing load requirement.
When the supply air pressure is 13 psi (90 kPa), the
thermostat controls at the normal DAY setting. When the
supply air is switched to 18 psi (124 kPa), the thermostat
controls at the reduced NITE setting. Models with 16 or 21 psi
(110 or 145 kPa) pressure are available. The TP971D is the
same as the TP971A with the addition of NITE setup. The
TP971E is the same as the TP971B with the addition of NITE
setup.
TP970D MINIMUM
THROTTLING RANGE =
5F (2.8C)
TP970D MAXIMUM
THROTTLING
RANGE = 20F (11.1C)
4
3
SETPOINT
2.5 2.5
2
1
12.5 10 7.5
5
5
7.5
10 12.5 15
15
(8) (7) (6) (5) (4) (3) (2) (1)
(1) (2) (3) (4) (5) (6) (7) (8)
SETPOINT
ABOVE SETPOINT
BELOW SETPOINT
DEVIATION IN SPACE TEMPERATURE—DEGREES F (C)
C3537
Fig. 3. TP970D Space Temperature Vs Branchline
Pressure.
The manual reset lever protrudes through the DAY/AUTO slot
in the cover. The lever is used to manually reset the
thermostat from AUTO to DAY to restore day operation. The
lever automatically returns to the AUTO position when the
supply air reaches DAY pressure.
TP970C
DIRECT
ACTING
M B
M
HEATING
VALVE
2 TO 5 PSI
(14 TO 34 kPa)
SPRING
COOLING
VALVE
9 TO 13 PSI
(62 TO 90 kPa)
SPRING
TP971A OR
TP9610A
DAY
13 PSI
(90 kPa)
M B
N.O.
N.C.
M
NITE
18 PSI
(124 kPa)
VALVE
OPEN
N.O.
4 DEGREES F
(2.2 DEGREES C)
ZERO
HOT WATER
OR STEAM
SUPPLY
C3540-1
ENERGY
BAND
VALVE
CLOSED
Fig. 6. TP971A and TP9610A Typical Operation.
66F
68F
20C
70F
72F
22C
74F
76F
24C
78F
TP971C
THERMOSTAT SETTING
TR=10 DEGREES F
(5.6 DEGREES C)
The TP971C can be used with a unit ventilator to control a
heating valve, outdoor- and return-air dampers, and blower
motor (Fig. 7). When supply air pressure is 13 psi (90 kPa),
the TP971C controls the valve and damper at the normal DAY
setpoint. When supply air pressure is 18 psi (125 kPa), the
TP971C closes the outdoor-air damper and switches the
blower from constant to automatic operation. The TP971C
then cycles the unit at reduced night setpoint. Models with 18
or 21 psi (125 or 145 kPa) pressure are available.
C3538
Fig. 4. Typical TP970C Operation Using Selected Spring
Range Valve Operators.
TP970C
DIRECT
ACTING
M B
M
RP971A—3 PSI
RANGE—SET
10 PSI (68.9 kPa)
START
RP971A—3 PSI
SPAN—SET
3.9 PSI (26.9 kPa)
START
The manual reset lever protrudes through the DAY/AUTO slot
in the cover. The lever may be used to manually reset the
TP971C from AUTO to DAY to restore DAY operation,
including outdoor-air damper operation. The reset lever
automatically returns to the AUTO position when the supply
air reaches DAY pressure.
2
1
4
2
1
4
3
3
EXH
EXH
M
M
HEATING
VALVE
3 TO 10 PSI
(21 TO 68.9 kPa)
COOLING
VALVE
N.O.
N.C.
3 TO 10 PSI
(21 TO 68.9 kPa)
VALVE
OPEN
4 DEGREES F
(2.2 DEGREES C)
ZERO
ENERGY
BAND
VALVE
CLOSED
66F
68F
20C
70F
72F
22C
74F
76F
24C
78F
THERMOSTAT SETTING
TR=10 DEGREES F
(5.6 DEGREES C)
C3539
Fig. 5. Typical TP970C Operation Using Ratio Relays.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
DISCHARGE AIR
TP973A OR
TP9630A
AIR
STREAM
STAT
M
N.O.
HOT WATER OR
STEAM SUPPLY
VALVE
C3543-1
HEATING
COIL
Fig. 9. TP973A and TP9630A Typical Operation, One-Pipe
Using External Restriction.
H
120V AC
50/60 HZ
P638
TP971
G
FAN
TP974A
MSB
K
H
The TP974A Sensor (Fig. 10) provides a pneumatic output
signal of 3 to 15 psi (21 to 103 kPa) in direct relation to the
sensed temperature, allowing direct and remote readout of
the temperature. An RP908 or RP920 Controller is used with
the TP974A to convert the output into a usable signal to
operate a pneumatic valve, damper, or other equipment.
MP516C
D/N
D/N
2
1
HI
M
LO
13/18 PSI
(90/124 kPa)
FILTER
OUTDOOR
AIR
RETURN
AIR
RP920
4
8
9
N.C.
N.O.
C3541
2
3
1
Fig. 7. TP971C Typical Operation.
M
VALVE
TP972A and TP9620A
TEMP
GAGE
M
B
The standard TP972Aand TP9620A is RA for cooling and DA
for heating. A rise in temperature at the TP972Aand TP9620A
with main air pressure at 13 psi (90 kPa) causes the
TP972Aand TP9620A to lower BLP, opening the valve to
control the temperature with chilled water. A fall in
temperature at the TP972Aand TP9620A with main air
pressure at 18 psi (124 kPa) causes the TP972Aand
TP9620A to lower BLP, opening the valve to control the
temperature with hot water (Fig. 8).
C3544A
TP974
Fig. 10. TP974 Typical Operation.
TP978E
NOTE: To vary the ZEB between heating and cooling
operation, adjust the setpoints on the TP978E.
TP972A OR
13 PSI
TP9620A
(90 kPa) RA
M B
A fall in temperature within the cooling range at the TP978E
causes the TP978E to increase the BLP of the cooling
element. This action proportionally closes the normally open
cooling valve (Fig. 11) to maintain the temperature set on the
high range portion of the TP978E. The normally open heating
valve is held closed by the high BLP on the DA side of the
TP978E.
S/W
18 PSI
(124 kPa)
DA
N.O.
HOT WATER/CHILLED
WATER SUPPLY
C3542-1
Fig. 8. TP972A and TP9620A Typical Operation with a
Normally Open Water Valve Assembly.
A continued fall in temperature, into the heating range at the
TP978E, lowers the BLP of the heating element. This action
proportionally opens the normally open heating valve to
maintain the temperature set on the low range portion of the
Models are available that limit the cooling setpoint to a
minimum of 75 or 78F, the heating setpoint to a maximum of
72 or 75F. They work with 13/18, 16/21, 25/20, 19/14, or 20/
25 psi changeover. Some models are DA for both cooling and
heating.
TP978E.
TP978E
H C
DA
RA
TP973A,B and TP9630A,B
EXTERNAL
RESTRICTORS
0.005
N.O.
N.O.
A fall in temperature at the TP973A or TP9630A causes the
TP973A or TP9630A to lower BLP, providing proportional
control of existing load requirements for heating (Fig. 9). A
rise in temperature at the TP973B or TP9630B causes the
TP973B or TP9630B to lower BLP, providing proportional
control of existing load requirements for cooling.
COOLING
VALVE
HEATING
VALVE
M
C3545
Fig. 11. TP978A Typical Operation.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
TP979A-E
MAINTENANCE
The TP979 thermostats provide independent control of
heating and cooling with dual thermostats and separate
setpoints and branch lines. This enables ZEB operation
without selected actuator springs or ratio relays (Fig. 12).
TP979C
General
See Figure 14 for tools necessary to calibrate TP970 and
TP9600 Series thermostats.
DA
RA
H C
COOLING VALVE
PNEUMATIC
OPERATOR WITH
4 TO 11 PSI
(28 to 76 kPa)
SPRING RANGE
HEATING VALVE
PNEUMATIC
OPERATOR WITH
4 TO 11 PSI
(28 to 76 kPa)
SPRING RANGE
N.O.
N.O.
M
THERMOSTAT TOOL
VALVE OPEN
ZERO
ENERGY
BAND
VALVE CLOSED
72F
64F
66F
68F
20C
70F
74F
76F
78F
120
140
100
160
TEST THERMOMETER
80
60
40
20
180
200
220
18C
22C
24C
26C
HEATING
SETPOINT
COOLING
SETPOINT
0
C3546
20
25
15
Fig. 12. TP979 Typical Operation.
10
30
The TP979D and E models provide automatic night setback
of setpoint for heating and setup for cooling. Figure 13 shows
potential energy savings with night setback operation.
5
0
GAGE PORT NEEDLE
VALVE OPEN
GAGE
NIGHT SETBACK
ENERGY SAVINGS
VALVE CLOSED
60F
62F
64F
66F
68F
20C
70F
DIGITAL RELATIVE
HUMIDITY INDICATOR PEN
16C
18C
22C
6 DEGREES F
(3.3 DEGREES C)
NIGHT SETBACK
C3929
NIGHT
DAY
HEATING
SETPOINT
COOLING
SETPOINT
C3547
Fig. 14. TP970 and TP9600 Series Thermostat
Calibration Tools.
Fig. 13. Night Setback Operation, TP979.
Covers
Cleaning
Both metal and plastic covers are available offering a wide
selection of windows. See Tables 11 and 12 in the
ACCESSORIES section for more information.
Remove the thermostat cover and clean or dust the
thermostat using a soft brush or air hose. In extremely dirty or
dusty environments, clean the thermostats more frequently.
DO NOT use a high pressure air hose to remove dust. Use
only a soft brush to clean the throttling plate nozzle assembly.
No lubrication is necessary.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
3. Turn the calibration screw in the opposite direction until
the gage reads 8 ±1 psi (55 ±7 kPa).
Calibration
4. The TP970 and TP9600 are now calibrated. The
setpoint indicator and thermometer should be within 1
degree F (0.56 degree C) of each other.
5. Remove the gage and gage adaptor and replace the
cover.
6. Turn the setpoint indicator adjustment until the setpoint
indicator is at the desired setting.
NOTES:
1. The antihum spring (Fig. 15) must be free. Be sure the
spring just touches the throttling plate and is not
wedged against it (does not apply to all TP970C and D
or any TP970 series starting with 2000, i.e.,
TP972A2143 and TP9600 series).
2. The thermostats are very sensitive and should not be
heated by excessive handling during calibration.
3. Calibration of the TP974 is not recommended.
4. To check calibration or to recalibrate the Limited Control
Range (LCR) thermostats, the space temperature must
be 78F (26C) or above for cooling applications, and 72
or 68F (22 or 20C) or below for heating applications,
depending on the model. TP972A1119 and
THROTTLING RANGE
SCALE (2)
GAGE TAP
(DAY/SUMMER)
ANTIHUM
SPRING (2)
THROTTLING
PLATE (2)
THROTTLING
RANGE
ADJUSTMENT (2)
(NITE/WINTER)
THERMOMETER
CALIBRATION
BOBBIN
TP972A1127 are 68F (20C). The setpoint limitation is
nonadjustable.
5. To check calibration or to recalibrate the TP978 ZEB
thermostats, measure actual room temperature with a
test thermometer. The 75F (24C) limit is nonadjustable.
SCALEPLATE
TEMPERATURE
INDICATOR
SETPOINT
INDICATOR
60
70
80
90
SETPOINT
INDICATOR
(NITE/WINTER)
CALIBRATION
SCREW
(DAY/SUMMER)
Calibration Check
SETPOINT DIAL
(NITE/WINTER)
STOPS
TEMPERATURE
SETTING
1. Turn the setpoint indicator adjustment down (DA) or up
(RA) until the setpoint indicator reads 5 degrees F (2.8
degrees C) below (DA) or above (RA) room
temperature. The BLP at the thermostat should build up
within 30 seconds.
2. Turn the setpoint indicator adjustment up (DA) or down
(RA) slowly. The thermostat should begin to bleed off
audibly between 1 and 3 degrees F (0.56 and 1.7
degrees C) below (DA) or above (RA) room
temperature.
SETPOINT INDICATOR
ADJUSTMENT
DAY/AUTO LEVER
(TP971 ONLY)
C3946-3
NOTE: NOT ALL ADJUSTMENTS ARE ON ALL THERMOSTATS.
Fig. 15. Thermostat Front View, Cover Off, Showing
Controls and Indicators.
TP970C and D
Thermometers
1. Set the throttling range to value specified on the job
drawing.
1. Measure the ambient temperature with an accurate
thermometer. Compare the thermometer reading with
the thermostat thermometer reading.
2. If the difference is more than 1 degree F (0.56 degree
C), use the Thermometer Calibration Tool MQT970 to
twist the thermostat thermometer calibration bobbin
(Fig. 15) until the thermostat thermometer reading is
correct.
2. Check the mechanical throttling range by turning the
setpoint indicator adjustment to determine the
difference in setpoint indicator readings when BLP
reads 3 psi (21 kPa) and 13 psi (90 kPa). It may be
necessary to turn the calibration screw to obtain this
measurement.
3. Reset the throttling range to within ±2 degrees F (±1.1
degrees C) of the specified throttling range for accurate
control. If either the throttling range adjustment or
calibration screw were changed, recalibrate the
thermostat.
Calibration Set-Up (For All Thermostats)
4. See TP970A and B, beginning at Step 1, for the
balance of TP970C and D calibration.
1. Start with the main air pressure at the recommended
setting.
2. Remove the thermostat cover.
3. All thermostats except the TP978E: Install Gage
305965 (0 to 30 psi [0 to 207 kPa]) with Gage Adapter
315161A (Fig. 14) into the branchline pressure gage
tap (except TP978E).
TP978E: Install a 0 to 30 psi (0 to 207 kPa) gage in the
branchline remote from the TP978E.
4. Turn the setpoint indicator adjustment until the setpoint
indicator reads the existing temperature.
TP971A-E and TP971A,B
1. With 13 psi (90 kPa) main air pressure, turn the DAY
(SUMMER) (left) calibration screw (Fig. 15) until the
gage reads 0 psi (0 kPa).
2. Turn the calibration screw in the opposite direction until
the gage reads 8 ±1 psi (55 ±7 kPa).
3. With 18 psi (124 kPa) main air pressure, rotate the
NITE (WINTER) setpoint dial until the setting agrees
with the indicated temperature.
TP970A,B and TP9600A,B
4. Repeat Steps 1 and 2 using the NITE (WINTER) (right)
calibration screw (Fig. 15). The TP971 is now
calibrated.
1. Set throttling range to value specified on the job
drawing.
5. Remove the gage and replace the cover.
2. Turn the calibration screw (Fig. 15) until the gage reads
0 psi (0 kPa).
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
TP972A and TP9620A
Switchover Calibration
1. With 13 psi (90 kPa) main air pressure, turn the DAY
(SUMMER) (left) calibration screw (Fig. 15) until the
gage reads 0 psi (0 kPa).
Switchover allows for normal supply line fluctuations.
TP971A-E and TP9610A,B
2. Turn the calibration screw in the opposite direction until
the gage reads 8 ±1 psi (55 ±7 kPa).
3. With 18 psi (124 kPa) main air pressure, repeat Steps 1
and 2 using the NITE (WINTER) (right) calibration
screw (Fig. 15). The TP972 and TP9620 are now
calibrated.
1. Ensure that main line pressure is set to low (13 psi)
pressure requirement.
2. Turn the setpoint indicator adjustment until the setpoint
indicator reads 5 degrees F (2.8 degrees C) below
actual temperature.
3. BLP gage should read 0 psi (0 kPa) (RA) or 13 psi (90
kPa) (DA). If it does not, turn switchover adjustment
screw (Fig. 16) clockwise until it does.
4. Remove the gage and replace the cover.
4. Turn the switchover adjustment screw counterclockwise
until the pressure begins to increase (RA) or decrease
(DA). This indicates switchover. Allow the gage to go to
full line pressure (RA) or 0 psi (0 kPa) (DA).
5. Turn the switchover adjustment screw counterclockwise
until pressure decreases to 0 psi (0 kPa) (RA) or
increases to full main line pressure (DA). Turn the
switchover adjustment screw an additional 1/8 to 1/4
turn clockwise. Switchover is calibrated.
TP973A,B and TP9630A,B
If the TP973A, B and TP9630A,B are not properly calibrated
but the remainder of the system is operating properly, turn the
calibration screw until the TP973A, B or TP9630A,B performs
as in Step 2 under CALIBRATION CHECK.
TP974A
TP972A and TP9620A (Cooling, RA;
Field calibration of the TP974A is not recommended.
Heating, DA)
1. Ensure that main line pressure is set to low (13 psi)
pressure requirement.
TP978A-E
2. Turn the setpoint indicator adjustment until the setpoint
indicator reads 5 degrees F (2.8 degrees C) below
actual temperature.
3. BLP gage should read 0 psi (0 kPa). If it does not, turn
the switchover adjustment screw (Fig. 16) clockwise
until it does.
If a TP978 thermostat is not properly calibrated but the
remainder of the system is operating properly, turn the
calibration screw until the thermostat performs as in Step 2
under CALIBRATION CHECK.
TP979A-C
4. Turn the switchover adjustment screw counterclockwise
until the pressure begins to increase. This indicates
switchover. Allow the gage to go to full main line
pressure.
1. Turn the calibration screw (Fig. 15) until the gage reads
0 psi (0 kPa).
5. Turn the switchover adjustment screw counterclockwise
until pressure decreases to 0 psi (switchover point).
Turn the switchover adjustment screw an additional 1/8
to 1/4 turn clockwise. Switchover is calibrated.
2. Turn the calibration screw in the opposite direction until
the gage reads 8 ±1 psi (55 ±7 kPa).
3. The thermostat is now calibrated. The setpoint indicator
and thermometer should be within 1 degree F (0.56
degree C) of each other.
4. Remove the gage and gage adaptor and replace the
cover.
5. Turn the setpoint indicator adjustment until the setpoint
indicator is at the desired setting.
TP979D and E
BACK PLATE
SCREWS (4)
1. With 13 psi (90 kPa) main line pressure, turn the DAY
(SUMMER) (left) calibration screw (Fig. 15) until the
gage reads 0 psi (0 kPa).
2. Turn the calibration screw in the opposite direction until
the gage reads 8 ±1 psi (55 ±7 kPa).
3. With 18 psi (124 kPa) main air pressure, rotate the
night setpoint dial until the setting agrees with the
indicated temperature.
B
M
THERMOSTAT
MULTISTAGE
FILTER
P
SWITCHOVER
ADJUSTMENT
SCREW
4. Repeat Steps 1 and 2 using the NITE (WINTER) (right)
calibration screw (Fig. 15). The thermostat is now
calibrated.
5. Remove the gage and replace cover.
DAY/AUTO
LEVER
M12211
Fig. 16. Back View of Thermostat Showing Switchover
Adjustment Screw and DAY/AUTO Lever.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
TROUBLESHOOTING
See Table 7 for troubleshooting procedures.
Table 7. TP970 Series Thermostat Troubleshooting Procedures.
Possible Cause Solution*
Problem
Excessive noise
If there is an antihum spring, it is not
touching the throttling plate.
Reposition spring to touch throttling plate.
Stick an adhesive paper dot on the throttling
plate across the hinge between the two rivets
so that the dot is directly below the “A” in MAX
printed on the bimetal.
If there is no antihum spring or cone,
Stick an adhesive paper dot on the throttling
the adhesive paper dot has fallen off of plate as described above.
the throttling plate.
Air leak in restrictor block and filter
assembly.
Use a bubble solution to locate the leak and
repair it.
Replace the restrictor block assembly and
filter.
Install Stiffener Plate 14004609-001 on the
backplate.
Oil or moisture in lines.
Replace the restrictor block assembly and
filter. Also ensure that the air supply to the
thermostat is dry and clean.
Slow response
Inadequate air flow caused by a
partially clogged restrictor block
assembly and/or filter cartridge.
Replace restrictor block assembly and/or
filter.
Thermostat instability
Inaccurate readings
System gain is too high.
Move throttling range adjustment toward MAX
position and then recalibrate.
Inaccurate calibration.
Recalibrate thermostat.
Turn setscrews in.
Metal cover setscrews over-tightened.
Backplate over-tightened.
Install Stiffener Plate 14004609-001 on the
backplate.
Thermostat not switching
over at changeover pressure
Pressure at thermostat is incorrect.
Readjust compressed airline to proper
switching pressure.
Switchover pressure in thermostat is
incorrectly calibrated.
Turn switchover adjustment screw to
recalibrate pressure for proper switching.
Air leak
Branch line plug leaking.
Oil or moisture in lines.
Install Plug 14002172.
Cannot calibrate thermostat
Replace the restrictor block assembly and
filter. Also ensure that the air supply to the
thermostat is dry and clean.
*If these solutions fail, replace the thermostat.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Setpoint Indicator Adjustment Replacement
REPAIR
NOTE: Dual temperature thermostats require removal of
only one of the bimetal assemblies.
Thermometer Replacement
NOTE: The following procedure requires a 1/4-in. (6 mm)
nut driver and a small screwdriver.
1. Remove the setpoint indicator (Fig. 17) by prying it off
the indicator post with a small screwdriver.
2. Remove the thermometer bimetal (Fig. 17) by lifting the
plate to which the scaleplate is attached, at the hex of
the bimetal mounting post.
1. Insert the blade of a small screwdriver under the
bimetal (Fig. 17) and pry up. Older style thermostats
have a locking ring. Insert the blade between the ring
and white nylon bushing and pry the ring from the
thermometer bimetal mounting post.
2. Remove the bimetal and bushing by lifting the top of the
plate to which the scaleplate is attached, near the hex
of the bimetal mounting post.
3. Bend the scaleplate locking tabs (Fig. 17) up and
compress the scaleplate mounting posts (Fig. 17)
together with the thumb and forefinger to free the
scaleplate from the holding notches in the post.
4. Remove and replace setpoint indicator adjustment (Fig.
17), using caution not to damage or distort the bimetal
sensing element(s). On models with DAY-NITE
temperature setpoint wheel (located under the right
sensing element), see the NOZZLE, THROTTLING
PLATE, and BIMETAL ASSEMBLY REPLACEMENT
section for removal of the bimetal and DAY-NITE scale
prior to removing the setpoint indicator adjustment.
5. Reassemble in reverse order and recalibrate if
required. It is not necessary to re-engage the scaleplate
locking tabs (Fig. 17) in the holding notches of the
scaleplate mounting posts, as they are primarily for
shipping purposes.
CAUTION
The new bimetal can be easily distorted if extreme
care is not used when handling it.
3. Press the new bimetal and bushing into the
thermometer post using a 1/4-in. (6 mm) nut driver over
the bobbin. Allow the bimetal to cool down to the
ambient temperature after handling. Slowly rotate the
bushing until the thermometer pointer is aligned with
the existing ambient temperature on the scaleplate.
Nozzle, Throttling Plate and Bimetal
Assembly Replacement
ANTIHUM
SPRING/CONE
1
1. Remove cover.
2. Remove the thermometer bimetal, temperature
indicator, and scaleplate as previously described, if
applicable.
BIMETAL
3. Unscrew center holding screw (TP978) or thermometer
mounting post using Thermostat Tool CCT735A
(MQT735A).
4. Remove the Phillips head screw and the defective
assembly (Fig. 18).
5. Replace with new assembly being sure the rubber O-
ring, if used, is properly aligned around the nozzle
opening in the recess on the bottom of the aluminum
block.
SETPOINT
INDICATOR
SCALEPLATE
MOUNTING POSTS
6. Insert spring cone (if used) into new assembly from the
bottom.
7. Reassemble the thermostat.
SCALEPLATE
LOCKING TABS
8. Check that the antihum spring or cone (if used) is
properly positioned so that the spring just touches the
throttling plate and the base of the spring (larger end) is
seated properly in the recess of the spring mounting
hole (Fig. 17).
SETPOINT INDICATOR
ADJUSTMENT
1
IF THERE IS NO ANTIHUM SPRING/CONE, THERE IS AN
ADHESIVE PAPER DOT ON THE THROTTLING PLATE.
M11384
9. Calibrate the thermostat.
Fig. 17. Internal View of Thermostat.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
NOZZLE, THROTTLING PLATE
SCREW
AND BIMETAL ASSEMBLY
SCREW
TYPICAL POST
SETPOINT CAM
ASSEMBLY
TYPICAL
PNEUMATIC
ASSEMBLY
SCREW
SPRING
O-RING
BOTTOM VIEW OF
BIMETAL ASSEMBLY
NOZZLE,
1
THROTTLING
PLATE AND
BIMETAL
ANTIHUM
SPRING
OR CONE
IF THERE IS NO ANTIHUM SPRING/CONE, THERE IS AN
ADHESIVE PAPER DOT ON THE THROTTLING PLATE.
1
ASSEMBLY
M12208
Fig. 18. Nozzle, Throttling Plate, Bimetal Assembly Replacement.
Restrictor Block and Filter Replacement
CAUTION
When replacing these parts, use extreme caution to
prevent dirt, dust, or chips from entering various
chambers and openings of the thermostat.
1. Remove the four Phillips head screws which fasten the
restrictor block and filter (Fig. 19) to the back of the
thermostat.
2. Carefully remove the restrictor block assembly (plate,
restrictor, filter, gasket[s]).
3. Replace the restrictor block and filter.
a. Align the appropriate gasket over the
corresponding holes in the thermostat.
b. Insert the filter into the gasket until it bottoms.
c. Position the restrictor block.
TYPICAL
PNEUMATIC
ASSEMBLY
GASKET
FILTER
d. Align the other gasket on the restrictor block.
e. Position the plate.
f. Replace screws and tighten.
RESTRICTOR
GASKET
PLATE
SCREW
M12206
Fig. 19. Restrictor Block and Filter Replacement.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Day/Auto Lever Assembly Replacement
Switchover Adjustment Spring Replacement
1. Remove the three Phillips head screws that fasten the
lever mechanism to the back of the thermostat (Fig.
20).
2. Lift off the cover plate and remove the lever (with
attached seal).
1. Using a screwdriver, carefully remove the screw and
switchover adjustment spring (Fig. 21). See PARTS
LIST in PARTS and ACCESSORIES section for
available springs.
2. Replace the spring, then carefully position and replace
the screw.
3. Lift the spring from the post.
4. Install the replacement parts in reverse order.
5. Replace and tighten screws.
3. Calibrate the thermostat.
14001992-001
16/21 PSI
CHANGEOVER
SPRING
SPRING
LEVER
SCREW
COVER
PLATE
M12137
CAUTION:
Fig. 21. Switchover Adjustment Spring Replacement.
THIS PIN IS FREE
TO DROP OUT WHEN
LEVER IS RELEASED.
M12205
Fig. 20. DAY/AUTO Lever Assembly Replacement.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
1A
PARTS AND ACCESSORIES
Parts List
1B
1C
1
TP970-TP974 and TP9600-TP9630
6
1
1D
See Figures 22 and 23, and Table 8 for TP970-TP974 and
TP9600-TP9630 Thermostat repair parts and assemblies.
2
7
2
1A
3
1B
4
8
1
1C
1D
1
9
2
5
7
10
*
1
1
8
6
10B
10A
10E
1
2
9
6
10C
10D
10F
10
11
12
BOTTOM VIEW
*
OF 10
10
12
10B
10C
10D
1
2
REPLACE THE SETPOINT CAM ASSEMBLY AND NOZZLE,
THROTTLING PLATE, AND BIMETAL ASSEMBLY TOGETHER.
IF THERE IS NO ANTIHUM SPRING/CONE, THERE IS AN
ADHESIVE PAPER DOT ON THE THROTTLING PLATE.
M12210
1
2
REPLACE THE SETPOINT CAM ASSEMBLY
AND NOZZLE, THROTTLING PLATE, AND
BIMETAL ASSEMBLY TOGETHER.
Fig. 23. Dual Element Thermostat Exploded View
Showing Repair Parts and Assemblies.
IF THERE IS NO ANTIHUM SPRING/CONE,
THERE IS AN ADHESIVE PAPER DOT ON
11
M12209
THE THROTTLING PLATE.
Fig. 22. Single Element Thermostat Exploded View
Showing Repair Parts and Assemblies.
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 8. TP970-TP974 and TP9600-TP9630 Thermostat Repair Parts and Assemblies.
Part No. Description
Key
No.
1
14004459-001 Scaleplate Bag Assembly (60 to 90F) - TP970A-D, TP973A, B
14004459-002 Scaleplate Bag Assembly (40 to 70F) - TP970A-D
14004459-003 Scaleplate Bag Assembly (15 to 30C) - TP970A-D, TP973A, B
14004459-004 Scaleplate Bag Assembly (60 to 90F) - TP971A-E
14004459-005 Scaleplate Bag Assembly (15 to 30C) - TP971A-C
1A
1B
1C
1D
2
—
—
—
—
—
—
—
—
—
Pointer
Thermostat Assembly
Scaleplate
Thermostat Mounting Post
Retainer Ring (Fig. 23)
Washer (Fig. 24)
Scaleplate
2
3
4
Post, Thermostat Assembly
Bushing - TP973
5
*
14004447-001 Setpoint Cam Assembly - TP970A1004, A1012, A1020, A1038, A1046, A1053, A1095, A2004,
A2012, A2020, A2038, A2053, A2095; TP970C; TP972A1143, A2143; TP973A1001, A1019,
A1127
14004447-002 Setpoint Cam Assembly - TP970B1002, B1010, B1028, B1036, B2002, B2010, B2028, B2036;
TP970D; TP972A1002, A1010, A1028, A1044, A2002, A2010, A2028, A2044; TP973B1009,
B1017, B1025, B1108
14004447-003 Setpoint Cam Assembly - TP971A, C, D; TP972A1168, A2168, A2176
14004447-004 Setpoint Cam Assembly - TP971B, E; TP972A1036, A1077, A1085, A1150, A1184, A2036,
A2150
14004447-005 Setpoint Cam Assembly - TP970B1044; TP972A1051, A1101
14004447-006 Setpoint Cam Assembly - TP970A1061, A1087, A2087
14004447-007 Setpoint Cam Assembly - TP972A1093, A1127
14004447-008 Setpoint Cam Assembly - TP972A 1119
14004429-001 Setpoint Cam - TP973A1035, A1043, A1050, A1068, A1076, A1084, A1092, A1100, A2068,
A2076, A2084, A2092, A2100
14004429-002 Setpoint Cam - TP973B1033, B1041, B1058, B1066, B1074, B1090, B2066, B2074, B2090
7
—
Screw, No. 4-3/16 pan head
8*
14004460-001 Nozzle, Throttling Plate, Bimetal Assembly, DA, Left Side - TP970A; TP971A, C, D; TP972A;
TP973A
14004460-002 Nozzle, Throttling Plate, Bimetal Assembly, RA Left Side - TP970B; TP971B, E; TP972A;
TP973B
14004460-003 Nozzle, Throttling Plate, Bimetal Assembly, DA, Right Side - TP971A, C; TP972A
14004460-004 Nozzle, Throttling Plate, Bimetal Assembly, DA - TP970C
14004460-005 Nozzle, Throttling Plate, Bimetal Assembly, RA - TP970D
14004460-006 Nozzle, Throttling Plate, Bimetal Assembly, DA, Right Side - TP971D
14004460-007 Nozzle, Throttling Plate, Bimetal Assembly, RA, Right Side - TP971E
9†
—
Antihum Spring/Cone
*Replace the Setpoint Cam Assembly and Nozzle, Throttling Plate, Bimetal Assembly together.
†If there is no antihum spring or cone, there is an adhesive paper dot on the throttling plate.
(continued)
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 8. TP970-TP974 and TP9600-TP9630 Thermostat Repair Parts and Assemblies (continued).
Key
No.
Part No.
Description
10
14002051-001 Pneumatic Assembly, TP970-TP973 - Includes 10B and 10C below
14002102-004 Pneumatic Assembly, TP974A - Includes 10B and 10C below
10A
—
Tab and Screw - TP974A
10B 14004419-001 Gasket, Restrictor block (included with 14002374-XXX)
10C 14001865-001 Filter
10D 14002374-001 Restrictor Block Assembly (0.005 restrictor, 2 pipe) - TP970A-D; TP971A, B, D, E; TP972A;
TP973A, B
14002374-005 Restrictor Block Assembly (0.005 restrictor, 3 pipe) - TP971C
14002374-006 Restrictor Block Assembly (0.007 restrictor, 2 pipe) - TP974A
10E 14002373-001 Switchover Spring Assembly, silver - 16 to 21 psi (110 to 145 kPa)
14002373-002 Switchover Spring Assembly, gold - 13 to 18 psi (90 to 124 kPa)
14003923-001 Switchover Spring Assembly, blue - 20 to 25 psi (140 to 175 kPa)
10F 14002372-001 DAY/AUTO Lever Assembly
11
12
—
Screw, No. 4-40 x 5/8 an head (included with 14002374-XXX)
14002053-001 Wall Plate Assembly with setscrews 14003454-001 (2)
*Replace the Setpoint Cam Assembly and Nozzle, Throttling Plate, Bimetal Assembly together.
†If there is no antihum spring or cone, there is an adhesive paper dot on the throttling plate.
TP978E
1
2
3
4
5
See Figure 24 and Table 9 for TP978E Thermostat repair
parts and assemblies. The TP978A-D Thermostats have not
been replaced.
M12207
Fig. 24. TP978E Exploded View.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 9. TP978E Thermostat Repair Parts and Assemblies.
Model
C
A
B
D
E
Key No.
Part No.
—
Description
Screw, No. 4 x 3/16 pan head (2)
Washer
1
2
3
X
X
—
X
X
X
14002387-004
14002098-004
14002098-005
14003855-005
14002095-001
14002387-005
14002387-006
14002387-007
Nozzle, Throttling Plate, Bimetal Assembly (DA, left)
Nozzle, Throttling Plate, Bimetal Assembly (RA, left)
Nozzle, Throttling Plate, Bimetal Assembly (DA, right)
Base and Cam Assembly
4
5
Mounting Plate Assembly
X
X
X
X
left side (R.A.) 60-73
X
Right side (D.A.) 77-90
X
Right side (R.A.) 77-90
Table 10. TP979A-E Thermostat Repair Parts
and Assemblies.
TP979A-E
See Figure 25 and Table 10 for TP979A-E Thermostat repair
parts and assemblies.
Key
No.
Part No.
14004057-001
14004058-001
TP979A
Description
Mounting Plate Assembly
Manifold Assembly
1
1
2
3
Requires two TP970A2004
Requires two TP970B2002
TP979B
2
TP979C
Requires one TP970A2004 and
one TP970B2002
3
TP979D
TP979E
Requires one TP9712003 and
one TP971D2007
COOL
M
B2
HEAT
Requires one TP971B2001 and
one TP971E2004
M
B1
90
80
70
60
90
Accessories
80
70
60
See TP970-TP974 and HP970 Series Fittings Installation
Instructions 95-7134 for illustrations or further information on
the following pneumatic fittings.
M12221
Fig. 25. TP979 Exploded View.
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 11. TP970 Series Thermostat Accessories.
Description
Part No.
Airhead:
Two-pipe red—angled
14000686-002
14000742-002
14001527-001
14004558-002
14004558-001
14002172-001
Two-pipe red—straight
Three-pipe —white, straight
Tube-Spring assembly—6 inch branch, black
Tube-Spring assembly—6 inch main, red
Branch Line Gage Tap Plug
Cable Assembly:
14001494-001
14001494-002
14001494-003
See Tables 11 & 12
14004505-001
14002362-001
14001496-001
311699
One-pipe—8 ft (2.5m) poly sheathing
Two-pipe—8 ft (2.5m) poly sheathing
Three-pipe—8 ft (2.5m) poly sheathing
Covers:
Double Elbow—Used with airheads
Duct Sampling Chamber with Shallow Wall Plate Fittings
Electrical Box Adapter Plate
Internal Tubing Spring—Used as strain relief inside plastic tubing
Modernization Fitting, Universal:
14002573-001
14002573-002
14003192-001
One- and Two-Pipe
Three-Pipe
Serviceline Adapter Kit (for Honeywell stats prior to 1985)
Mounting Ring:
14004458-001
14004458-001
14000885-001
14004300-001
Flush
Surface
Standoff Plaster Ring
Setpoint (Indicator Adjustment) Knob Retainer Kit—Used to prevent setpoint knob breakage
on TP970 and TP973 thermostats with metal covers. Kit contains two socket-head screws,
an Allen key, two round spacers, and a bar. The bar fits across the bottom of the
thermostat to shield setpoint knob.
14002430-001
14002424-002
AK3970
Thermostat Heavy Duty Guard
Wall Box—Aspirating with 8 ft (2.5m) 5/32-in. O.D. plastic tubing
Cover for Aspirating Wall Box
Wall Box—Deep:
14001494-001
14001494-002
14001494-003
14001492-001
14001354-001
14001355-001
One-Pipe—8 ft (2.5m) copper tubing assembly
Two-Pipe—8 ft (2.5m) copper tubing assembly
Three-Pipe—8 ft (2.5m) copper tubing assembly
Two-Pipe—8 ft (2.5m), 5/32-in. plastic tubing assembly (modified 1985)
Mounting Bracket—Deep Wall Box
Box alone
Wall Box—Shallow:
14001615-001
14001616-001
14001615-002
14001616-002
14001614-001
One-Pipe—8 ft (2.5m) copper tubing assembly (modified 1985)
One-Pipe—8 ft (2.5m), 5/32-in. plastic tubing assembly (modified 1985)
Two-Pipe—8 ft (2.5m) copper tubing assembly (modified 1985)
Two-Pipe—8 ft (2.5m), 5/32-in. plastic tubing assembly (modified 1985)
Plate alone
Wall Plate:
14002136-004
14002136-005
14002540-002
14004401-002
14001905-001
14002053-001
Black
Beige
Q629 A-C Fan Speed Switch
Convertastat Adapter
Wall Plate Assembly—blank, beige, with screws
Mounting Plate Assembly (Before 1985 this was a metal plate requiring an airhead. Now it is
plastic and includes tube connection barbs.)
Steel Stiffener Plate (for stronger support of 14002053-001)
14004609-001
75-7134—1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS
Table 12. TP970 Series Thermostat Covers—Satin Chrome.
Part Number 14004406-XXX*
Honeywell Logo
Setpoint Slot
No Logo
Setpoint Slot
Open
Mounting
Closed
Mounting
Open
Mounting
Horiz
Closed
Mounting
Vert Horiz
Window
Insert
Display Unit
Vert
Horiz
Vert
Horiz Vert
None
——
——
-300
-400
——
——
†
-800
Setpoint
Thermometer
15-30 (C)
60-90 (F)
40-70 (F)
60-90 (F)
15-30 (C)
60-90 (F)
40-70 (F)
Heat
-110
-111
-112
-114
-210
-211
——
——
-310
-311
——
——
——
——
——
——
——
-511
——
——
——
-611
——
——
——
-711
——
——
——
——
——
——
60 70 80 90
60 70 80 90
range/
Cool range
60-90 (F)
15-30 (C)
60-90 (F)
40-70 (F)
COOLER/
WARMER
——
——
——
——
-120
-121
-122
-123
——
——
——
——
-320
-321
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
——
60 70 80 90
60 70 80 90
——
——
15-30 (C)
60-90 (F)
-330
——
——
——
——
——
——
——
*When ordering, use complete part number including three-digit suffix.
†14004406-008 Cover also suitable for vertical mounting.
75-7134—1
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Table 13. TP970 Series Thermostat Covers—Beige Plastic.
Part Number 14004407-XXX*
Honeywell Logo
Setpoint Slot
No Logo
Setpoint Slot
Open
Mounting
Closed
Mounting
Open
Mounting
Horiz
Closed
Mounting
Vert Horiz
Window
Insert
Display Unit
Vert
Horiz
Vert
Horiz Vert
None
——
——
-300
-400
——
——
†
-800
Setpoint
Thermometer
15-30 (C)
60-90 (F)
15-30 (C)
60-90 (F)
15-30 (C)
-110
-111
-113
-210
——
——
——
-311
——
——
——
——
——
-511
——
——
——
——
——
——
——
——
——
——
60-90 (F)
60 70 80 90
60 70 80 90
60-90 (F)
——
-121
——
——
——
——
——
——
——
60 70 80 90
*When ordering, use complete part number including three-digit suffix.
†14004406-008 Cover also suitable for vertical mounting.
Table 14. TP9600 Series Thermostat Covers.
Model Setpoint Thermometer
14004407-XXX Covers are paintable. See HP970-72 and
TP970-74 Pneumatic Sensors, Humidistats, and Thermostats
Installation Instructions 95-5597 for painting information.
TP9600A
TP9600B
TP9603A
TP9603B
TP9610A
TP9610B
TP9613A
TP9613B
TP9620A
TP9623B
TP9630A
TP9630B
TP9633A
TP9633B
Visible and adjustable Visible
Visible and adjustable Visible
Concealed
Concealed
Concealed
Concealed
Visible and adjustable Visible
Visible and adjustable Visible
Concealed
Concealed
Concealed
Concealed
Visible and adjustable Visible
Concealed
Concealed
Visible and adjustable Visible
Visible and adjustable Visible
Concealed
Concealed
Concealed
Concealed
Fig. 26. TP9600 Series Thermostat.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
P.O. Box 524
Minneapolis MN 55408-0524
M2H 3N7
Printed in U.S.A. on recycled
paper containing at least 10%
75-7134—1 R. F. Rev. 12-97
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