Product Overview

Thermostats
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A-26
Control Action ............................... Heating/Cooling, Direct and Reverse;
Direct only; Reverse only
Operating Range ........................................... 60 to 85°F (15.5 to 29.4°C)
Operating Pressure .............................................. 30 psi (207 kPa) max.
Adjustment Sensitivity ........................1 to 5.25 psi/°F (12 to 65 kPa/°C)
Factory Sensitivity Setting .................................2.25 psi/°F (28 kPa/°C)
Temperature Response ...................................................... 0.2°F (0.1°C)
Maximum Ambient Temperature
Case .............................................................................. 135°F (57.2°C)
Bulb ................................................................................ 231°F (111°C)
Scale Graduations ............................................................... 1°F (0.55°C)
Nominal Air Supply Pressure
Direct or Reverse Acting .............................................. 25 psi (172 kPa)
Heating/Cooling ................................. 25 psi (172 kPa)/18 psi (124 kPa)
Average Air Usage
20 scim Restrictor ...................................................... 25 scim (6.8 ml/s)
40 scim Restrictor .................................................... 45 scim (12.2 ml/s)
Air Connections ......... 1/4" (6 mm) Brass barbed for polyethylene tubing
Bulb Size ............................................................ 3/8" Diameter x 3-1/2" L
(9.5 mm Diameter x 89 mm L)
Capillary Length .................................................. 48" (121.9 cm) approx.
Finish ............................................... Corrosion-resistant Zinc Chromate
Dimensions (case)
Heating/Cooling, Reverse Acting ................... 3.1" W x 2.4" H x 2.13" D
(100 mm W x 61 mm H x 54 mm D)
Direct Acting ................................................... 3.1" W x 2.4" H x 1.38" D
(100 mm W x 61 mm H x 35 mm D)
Shipping Weight ............................................................. 3.0 lb. (1.36 kg)
Changeover Average
Control Action Pressure Air Usage Part No.
Direct Acting/25 psi (172 kPa) — 40 scim (11 ml/s) 188-0031
Reverse Acting (Cooling) 18 psi — 20 scim (5 ml/s) 188-0024
Direct Acting/Reverse Acting (Cooling)
18 psi (124 kPa) — 40 scim (11 ml/s) 188-0030
Retroline Direct Acting/Reverse Acting 18 psi 15 psi (103 kPa) 40 scim (11 ml/s) 188-0033
(124 kPa)/13 psi (90 kPa). Retroline
replacement for Honeywell LP916BXXXX.
Retroline Direct Acting/Reverse Acting 20 psi 17 psi (117 kPa) 40 scim (11 ml/s) 188-0034
(138 kPa)/15 psi (103 kPa). Retroline
replacement for Johnson Controls T-3300-2.
188
Single
Setpoint
Heat/Cool
Specifi cations/Product Ordering
A-90
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