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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
R-66
S26 Series Switching Subbase
Description
The S26 Series is a switching subbase used
in conjunction with T26A, T26J, and T26S
thermostats to provide system and fan
switching capability.
The variety of switching configurations
available with the S26 Series adds application
flexibility to the T26 Series thermostats.
Refer to the S26 Series Switching Subbase
Product Bulletin (LIT-125610) for important
product application information.
Features
mounts directly to a two-gang electrical
box
wiring connections enclosed and isolated
from the user
smooth action multi-position slide switches
for dependable service
can be added to existing T26 Series
thermostats (new style with plastic cover)
high-impact plastic enclosure
Repair Information
If the S26 Series Switching Subbase fails to
operate within its specifications, replace the
unit. For a replacement subbase, contact the
nearest Johnson
Controls®
representative.
Applications
S26 Series subbases are available with a
variety of system switch configurations for
manual control of system operation and fan
speed for heating, cooling, and combination
heating/cooling equipment.
Selection Chart
Product Code
Number
System
Switch
Fan Switch
S26AA-1
Heat-off-cool Low-med-high
S26AH-1 Heat-off-cool None
S26DH-1 Off-auto None
Technical Specifications
S26 Series System Switching Subbase
Finish Cover Almond
Faceplate Gold metallic with dark brown border and lettering
Material Base 0.050 in. (1 mm) cold rolled steel
Cover 0.090 in. (2 mm) high impact PVC plastic
Mounting Mounts to a 2-gang electrical box
Shipping
Weight
Individual
Pack
7 oz (0.20 kg)
Overpack
of 20 Units
10 lb, 4 oz (4.65 kg)
Wiring Connections Color coded No. 16 AWG wires, 8 in. (203 mm) long
Electrical Ratings
Motor Ratings 120V 208V 240V 277V
AC full load A 12.0 6.9 6.0 5.2
AC locked rotor A 72 41.4 36 31.2
AC non-inductive A 6.5 6.5 6.5
Pilot Duty 125 VA, 24 to 277 VAC
Typical Wiring Configuration for Cooling S26
T26S and S26AH (T46SAH) Heat-Off-Cool Selector Switch
with Continuous Fan (Heating and Cooling)
Gray
Black
FIG:T46SAH
Typical Wiring Configurations for Combinations
Gray
Black
Red
H C H C
FIG:T4SDH
T26S and S26DH (T46SDH) Off-Auto Selector Switch
with Manual or Automatic Changeover Switch and
Continuous Fan (Heating and Cooling)
S26 Series Switching Subbase
Multi-Stage Electromechanical Temperature Controls
Code No. LIT-1922250
Gray
Black
FIG:T46SAA
T26S and S26AA (T46SAA) Heat-Off-Cool Selector Switch
with Fan Speed Control (Heating and Cooling)