77-9382-1
TP970 and TP9600 Series
Pneumatic Thermostats
Copyright © 1997 Honeywell Inc. • All Rights Reserved
ENGINEERING DATA
Contents
Introduction .............................................................................................................................. 2
Fundamentals of
Thermostat Operation .............................................................................................................................. 2
General................................................................................................................. 2
Flapper-Nozzle Operation.................................................................................... 2
Valve Unit Operation ............................................................................................ 2
TP973A, B and TP9630 A, B
Low-Capacity, Single-Temperature
Thermostats .............................................................................................................................. 4
General................................................................................................................. 4
Operation.............................................................................................................. 5
Direct Action.................................................................................................. 5
Reverse Action.............................................................................................. 5
TP970A-D and TP9600A, B
High-Capacity, Single-Temperature
Thermostats .............................................................................................................................. 6
General................................................................................................................. 6
Operation.............................................................................................................. 6
Direct Action.................................................................................................. 6
Reverse Action.............................................................................................. 7
TP971A-C and TP9610A, B
High-Capacity, Dual-Temperature
Thermostats .............................................................................................................................. 7
TP971B and TP9610B ......................................................................................... 7
TP971C ................................................................................................................ 7
TP971A and TP9610A ......................................................................................... 7
Daytime Operation ............................................................................................... 8
Nighttime Operation ............................................................................................. 8
Manual DAY Override........................................................................................... 9
TP972A and TP9620A High-Capacity,
Heating/Cooling Thermostat .............................................................................................................................. 10
General................................................................................................................. 10
Operation.............................................................................................................. 12
TP974A Room
Temperature Sensor .............................................................................................................................. 12
General................................................................................................................. 12
Operation.............................................................................................................. 12
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