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
nOne (1) power base
oTwo (2) plastic anchors
pTwo (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.
nTurn off power to the heating system at the main electrical panel
to avoid electrical shock.
oWire the base according to your application. See typical wiring
diagrams in sections 4.1 and 4.2.
pFor a floor heating system installation, con-
nect the floor sensor between the S and R ter-
minals.
qSecure the base to the wall using the provided screws and wall
anchors.
rConfigure the switches located on the control module (if any).
Refer to the user guide.
sInstall the control module onto the base.
tApply power to the heating system.
uVerify 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
nApplications
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.
oSupplied Parts
2.
pInstallation Guidelines
3.
qInstallation Procedure
4.
rTechnical Specifications
5.
Electrical
Panel
Heater
Blue Red
Black
Electrical
Panel
Heater
Heater
External 24 V
Transformer
Red
Red
Black
Black
PB112-024T-15S