Product Overview

2 P45 Product Bulletin
Fig. 2 -- P45 Control with cover
removed. Note convenience of
terminals for easy wiring.
Time Delay Heater Circuit
For voltage applications other
than listed in Specification table,
consult Customer Service.
Mounting Bracket
Universal mounting bracket, Part
271-51, supplied when specified.
Outdoor Enclosure
Available on quantity orders,
when specified.
Time Delay Relay
The time delay relay is a
“trip-free”, thermal expansion
device. Manual reset models
are available with factory set and
sealed time delays of 30, 45, 60,
90 or 120 seconds.
The time delay relay is
compensated to minimize the
effect of ambient temperature
variations. Timing is affected by
voltage variations.
For applications using a 208 volt
control circuit, it is suggested
that one leg of the 208 volt
circuit and a neutral or ground
wire be used to power the
120 volt circuit of the time delay
heater.
When a P45 control is installed
on a 440 or 550 VAC system,
use an external step-down
transformer to provide either
120 or 240 volts to the pilot and
time delay relay circuits. The
transformer must be of sufficient
volt-ampere capacity to operate
the motor starter and the P45’s
time delay relay.
Repairs and Replacement
Field repairs must not be made.
For a replacement control
contact the nearest Johnson
Controls wholesaler.
Ordering Information
To order, specify:
1. Quantity required.
2. Factory setting -- pressure
differential below which time
delay circuit is energized.
3. Complete Product Number
if available.
4. If Product Number is not
available, specify the Type
Number and the following:
a. Connector Style 5,
Style 13 or Style 34.
See Fig. 3.
b. Timing in seconds (30,
45, 60, 90, 120).
c. Time delay heater
circuit voltage.
1) 120/240 dual voltage.
2) 24 VAC or DC