resideo AT150F Installation Instructions

AT150F, AT175F Universal Circuit
Breaker Transformers

APPLICATION

These transformers provide power to 24 Vac circuits in
heating/cooling control systems. Although the
transformers are typically used in heating/cooling
control systems, they can be used in any application
that does not exceed the load ratings. They include a
Input Voltage
Model Number
AT150F 120/208/240
208/277/480
AT175F 120/208/240
208/277/480

INSTALLATION

When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a haz-
ardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable
for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Disconnect power supply before beginning
installation to prevent electrical shock or
equipment damage.
The transformer can be foot-mounted or conduit/panel
mounted.

Mounting

Foot Mounting

Mount the transformer using screws (not included)
through the four 3/16 in. x 3/8 in. holes in the mounting
feet. See Fig. 1. Make line voltage primary connections
within an approved enclosure.
Table 1. Model Specifications.
Primary
Wiring
(60 Hz) Connections
9 in. leadwires
9 in. leadwires
INSTALLATION INSTRUCTIONS
button for manually resetting the circuit breaker. They
meet National Electrical Code Class 2 "not wet" and
Class 3 "wet" requirements and are Underwriters
Laboratories (UL) Inc. listed under UL 1585.
Transformers can be foot-mounted or conduit/panel
mounted. See Table 1 for additional specifications.
Secondary
Voltage
Open At Rated
Circuit Power Output
27.0 24.0
27.0 24.0
USE SCREWS OR
BOLTS THROUGH
SLOTS (4) IN
MOUNTING FEET
LEADWIRES
FOR PRIMARY
AND SECONDARY
CONNECTIONS
MOUNTING
FOOT (2)
Wiring at 100 Percent
Connections
9 in. leadwires 50 VA
9 in. leadwires 75 VA
Fig. 1. Foot mounting.
Output Rating
Power Factor
RESET
BUTTON
M6905
69-1014-02