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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-
The TP970 and TP9600 Series Pneumatic Thermostats are
type thermostats for heating or cooling applications.
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 application
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS See Tables 1 though 6 for additional specifications. These SPECIFICATIONS tables represent the direct replacements of existing thermostats at the time of the introduction of the 2000 series Maximum Safe Air Pressure: of thermostats. For replacement parts, see PARTS and 25 psi (172 kPa) ACCESSORIES. Maximum Safe Temperature: 150F (66C) Table 1. TP970A-D Thermostat Specifications.* Supply Air Degrees Old New Pressure Throttling Model No. Model No. Desc
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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 2069 RA, 2-Pipe 60-90 F 18 (124) Includes 25 ft (7.6m) Twin Tubing with Adjustable 1400406-121 Cover 2-10 F (1.1-5.6 C) TP970B 1077 TP970B 2077 Convertastat Kit with Universal Window Cover Ñ TP970B 2085 Quick Mount with 14004407-300 Cover Ñ TP970B 2093
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS Table 2. TP971A-E Thermostat Specifications (continued).* Supply Air Degrees Old New Pressure Throttling Model No. Model No. Description Setpoint psi (kPa) Range Special Features Ñ TP971A 2110 DA, Heating, 60-90 F 13 or 18 Adjustable 2- Quick Mount with 14004407-300 Cover 2-Pipe DAY Range 10 F (1.1-5.6 C) Ñ TP971A 2128 (90 or 124) Quick Mount with 14004407-121 Cover Ñ TP971A 2136 Quick Mount with 14004407-111 Cover Ñ TP971A 2144 Quick Mount with 1
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS Table 3. TP972A Thermostat Specifications.* Action Supply Air Degrees Pressure Throttling Old New Left Right psi (kPa) Range Model No. Model No. Bimetal Bimetal Setpoint Special Features TP972A 1002 TP972A 2002 60-90 F 13 (Cooling) or Adjustable Ñ TP972A 1010 TP972A 2010 R.A. D.A. 15-30 C 18 (Heating) 2-10 FÑ TP972A 1028 TP972A 2028 60-90 F (90 or 124) (1.1-5.6 C) Universal Modernization Kit with Universal Window Cover TP972A 1036 TP972A 2036 60-
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS Table 4. TP973A and B Thermostat Specifications.* Supply Air Degrees Old New Pressure Throttling Model No. Model No. Action Setpoint psi (kPa) Range Special Features TP973A 1068 TP973A 2068 DA 60-90 F 18 (124) Universal Modernization Kit with Universal Adjustable Window Cover 2-10 F (1.1-5.6 C) TP973A 1076 TP973A 2076 Ñ TP973A 1084 TP973A 2084 15-30 CÑ TP973A 1092 TP973A 2092 60-90 F Honeywell Thermostat Modernization Kit with Universal Window Co
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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 Setpoint psi (kPa) Range Special Features TP974A 1000 TP974A 2000 DA, 1- or 50-100 F 18 (124) Ñ Sensor for use with 2-Pipe Sensor (10-38 C) 3-15 (21-103) RP908 & RP920 Bleed Type Range Output Controller TP978A 1006 No DA Heating 60-73 F 18 (124) 2-10 F ZEB Energy Replacement DA Cooling Heating (1.1-5.6 C) Conse
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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 Open TP970A 2004 TP9600B 1006 RA, Open Windows Open TP970B 2002 TP9603A 1001 DA, Close Windows Closed TP970A 2004 TP9603B 1000 RA, Close Windows Closed TP970B 2002 Day/Night, Two-Pipe: TP9610A 1006 DA, Open Windows Open TP971A 2003 TP9610B 1005 RA, Open Windows Open TP971B 2001 TP9613A 1000 DA, Clos
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS 15 TP971A, B, D, E and TP9610A,B (100) 14 (90) 13 12 (80) These thermostats provide a BLP proportional to the ambient TP970D MINIMUM 11 THROTTLING RANGE = (70) temperature. In a heating application with a normally open 10 5F (2.8C) 9 (60) valve (Fig. 6), a fall in room temperature causes the 8 TP970D MAXIMUM (50) 7 thermostat to lower the BLP to the valve, providing a THROTTLING 6 (40) RANGE = 20F (11.1C) proportional action matching the existing
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS DISCHARGE AIR TP973A OR TP9630A AIR STREAM M STAT N.O. HOT WATER OR VALVE STEAM SUPPLY C3543-1 HEATING COIL Fig. 9. TP973A and TP9630A Typical Operation, One-Pipe H Using External Restriction. 120V AC 50/60 HZ P638 TP971 G C FAN TP974A MSB K H The TP974A Sensor (Fig. 10) provides a pneumatic output D/N MP516C signal of 3 to 15 psi (21 to 103 kPa) in direct relation to the D/N 2 1 HI M sensed temperature, allowing direct and remote readout of LO
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS TP979A-E MAINTENANCE The TP979 thermostats provide independent control of General heating and cooling with dual thermostats and separate setpoints and branch lines. This enables ZEB operation See Figure 14 for tools necessary to calibrate TP970 and without selected actuator springs or ratio relays (Fig. 12). TP9600 Series thermostats. TP979C DA RA H C COOLING VALVE HEATING VALVE PNEUMATIC PNEUMATIC OPERATOR WITH OPERATOR WITH 4 TO 11 PSI 4 TO 11 PSI
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MAX TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS 3. Turn the calibration screw in the opposite direction until Calibration the gage reads 8 ±1 psi (55 ±7 kPa). 4. The TP970 and TP9600 are now calibrated. The NOTES: setpoint indicator and thermometer should be within 1 1. The antihum spring (Fig. 15) must be free. Be sure the degree F (0.56 degree C) of each other. spring just touches the throttling plate and is not 5. Remove the gage and gage adaptor and replace the wedged against it (does not
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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 Switchover allows for normal supply line fluctuations. (SUMMER) (left) calibration screw (Fig. 15) until the gage reads 0 psi (0 kPa). TP971A-E and TP9610A,B 2. Turn the calibration screw in the opposite direction until 1. Ensure that main line pressure is set to low (13 psi) the gage reads 8 ±1 psi (55 ±7 kPa). pressure requirement. 3. With 18 psi (124
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS TROUBLESHOOTING See Table 7 for troubleshooting procedures. Table 7. TP970 Series Thermostat Troubleshooting Procedures. Problem Possible Cause Solution* Excessive noise If there is an antihum spring, it is not Reposition spring to touch throttling plate. touching the 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 ÒAÓ in MAX printed on the bimetal. If
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS Setpoint Indicator Adjustment Replacement REPAIR NOTE: Dual temperature thermostats require removal of Thermometer Replacement only one of the bimetal assemblies. NOTE: The following procedure requires a 1/4-in. (6 mm) 1. Remove the setpoint indicator (Fig. 17) by prying it off nut driver and a small screwdriver. the indicator post with a small screwdriver. 2. Remove the thermometer bimetal (Fig. 17) by lifting the 1. Insert the blade of a small scre
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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 NOZZLE, BIMETAL ASSEMBLY 1 THROTTLING PLATE AND ANTIHUM BIMETAL SPRING 1 IF THERE IS NO ANTIHUM SPRING/CONE, THERE IS AN ASSEMBLY OR CONE ADHESIVE PAPER DOT ON THE THROTTLING PLATE. M12208 Fig. 18. Nozzle, Throttling Plate, Bimetal Assembly Replacement. Restrictor Block and Filter Replace
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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 1. Using a screwdriver, carefully remove the screw and lever mechanism to the back of the thermostat (Fig. switchover adjustment spring (Fig. 21). See PARTS 20). LIST in PARTS and ACCESSORIES section for 2. Lift off the cover plate and remove the lever (with available springs. attached seal). 2. Replace the spring, the
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS 1A PARTS AND ACCESSORIES 1B Parts List 1 1C TP970-TP974 and TP9600-TP9630 6 See Figures 22 and 23, and Table 8 for TP970-TP974 and 1D 1 TP9600-TP9630 Thermostat repair parts and assemblies. 2 2 1A 7 3 1B 4 8 1 1C 1 9 1D 2 5 7 10 1 * 1 6 10B 8 10A 10E 1 2 6 9 10C 10D 10F 10 11 12 BOTTOM VIEW * OF 10 10 12 10B 10C 1 REPLACE THE SETPOINT CAM ASSEMBLY AND NOZZLE, THROTTLING PLATE, AND BIMETAL ASSEMBLY TOGETHER. 2 IF THERE IS NO ANTIHUM SPRING/CO
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TP970 AND TP9600 SERIES PNEUMATIC THERMOSTATS Table 8. TP970-TP974 and TP9600-TP9630 Thermostat Repair Parts and Assemblies. Key No. Part No. Description 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 Ñ Pointer 1B Ñ Ther
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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 Ñ 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
