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PB112-024T-15S 400-112-024-A 18/1/06 1/1
The PB112-024T-15S power base can be used on any TH11x series
thermostat (with the exception of the TH110 model). This low-voltage
power base operates on 15-second cycles and can be connected to
a line-voltage load using a solid-state relay. The PB112-024T-15S is
compatible with most solid-state relays; however, the following Aube
relays are optimized for use with this power base:
• RT850 solid-state relay (SSR)
• RT850T solid-state relay (SSR) with built-in 24-V transformer
n One (1) power base
o Two (2) plastic anchors
p Two (2) mounting screws
For a new installation, choose a location about 1.5 m (5 ft.)
above the floor.
The thermostat must be installed on an inside wall facing the
heating system (except for floor heating systems).
Avoid locations where there are air drafts (top of staircase, air
outlet), dead air spots (behind a door), direct sunlight or
concealed chimney or stove pipes (except for floor heating
systems).
The installation must be carried out by an electrician and com-
ply with local electrical codes.
n Turn off power to the heating system at the main electrical panel
to avoid electrical shock.
o Wire the base according to your application. See typical wiring
diagrams in sections 4.1 and 4.2.
p For a floor heating system installation, con-
nect the floor sensor between the S and R ter-
minals.
q Secure the base to the wall using the provided screws and wall
anchors.
r Configure the switches located on the control module (if any).
Refer to the user guide.
s Install the control module onto the base.
t Apply power to the heating system.
u Verify the installation by checking that the heating system can be
turned on or off using the thermostat.
4.1 Single SSR with Built-in Transformer
4.2 Multiple SSRs with External Transformer
Maximum load: 0.5 A / 24 VAC
Heating cycle length: 15 seconds
Operating temperature: 32°F to 122°F (0°C to 50°C)
Storage: -4°F to 122°F (-20°C to 50°C)
Size (H•W•D): 124 x 70 x 23 mm (4.89 x 2.76 x 0.91 in)
Wire gauge: 14 to 22 AWG
n
Applications
1.
WARNING
This power base MUST be used ONLY with solid-state relays. The
use of electromechanical relays will result in reduced life expect-
ancy and in the possibility of overheating of these devices.
o
Supplied Parts
2.
p
Installation Guidelines
3.
q
Installation Procedure
4.
r
Technical Specifications
5.
Electrical
Panel
Heater
Blue
Red
Black
Electrical
Panel
Heater
Heater
External 24 V
Transformer
Red
Red
Black
Black
PB112-024T-15S
Installation Instructions
24 V Low-Voltage Power Base