Product Overview

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Thermostats
A-3
Proven to provide fast response and highly accurate temperature
control, Powerstar Pneumatic Room Thermostats are designed to
control heating and/or cooling by operating a variety of pneumatic
devices such as valves or damper actuators.
Powerstar thermostats are factory-calibrated to control pneumatic
devices over a 3 to 15 psi (103 to 207 kPa) range.
Powerstar pneumatic room thermostats are available
for the following applications:
• Single Temperature • Free Energy Band
• Day/Night • Free Energy Band
• Day/Night/Vent with Hesitation
• Heating/Cooling
Covers are available with concealed or exposed set point
adjustment, room temperature indication, and setpoint indicator.
Selection Guide
Air Supply Applications Control Control Control Model
Outputs Setpoints Actions
Low High
(1-pipe) (2-pipe)
15 to 30 psi • Heat or Cool Single Single Direct/Reverse 192 S
(103 to 207 kPa)
Cool 18 psi (124 kPa)
• Heat and Cool (auto changeover) Single Dual Direct/Direct 192 HC
Heat 25 psi (172 kPa)
• Factory-calibrated (194 HC) for (Heat/Cool) Reverse/Reverse 194 HC
Honeywell or Johnson retrofi t Direct/Reverse
Reverse/Direct
Day 18 psi (124 kPa)
• Day and Night (auto changeover) Single Dual Direct/Direct 192 DN
Night 25 psi (172 kPa) • Factory-calibrated (194 DN) for (Day/Night) Reverse/Reverse 194 DN
Honeywell or Johnson retrofi t
• R2 vent (“0”) day, full supply night
(DNV only, 3-pipe)
• Night override selector switch
Day 18 psi (124 kPa)
• Day and Night (auto changeover) Dual Dual None 192 DNV
Night 25 psi (172 kPa) • Factory-calibrated (194 DN for (Day/Night 194 DNV
Honeywell or Johnson retrofi t) with Vent)
• R2 vent (“0”) day, full supply night
(DNV only, 3-pipes)
• Night override selector switch
15 to 30 psi
• Heat and Cool Dual Dual Direct/Direct 193 HC Free
(103 to 207 kPa)
• Sequence-controlled devices with (Heat/Cool) Reverse/Reverse Energy Band
two control lines (same or different Direct/Reverse
range) Reverse/Direct
15 to 30 psi
• Heat and Cool Single Dual Direct/Direct 193 HC Free
(103 to 207 kPa) • Sequence-controlled devices with (Heat/Cool) Energy Band
one control line (different spring (Hesitation)
ranges)
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Overview
Powerstar Room Thermostats
Air Output Capacity