Installation Instructions A19ANC/ANF/APC
Issue Date 0918
© 2018 Johnson Controls
1
Part No. 3530, Rev. K
A19ANC, A19ANF, A19APC
NEMA Type 3R Thermostats
Application
The A19ANC, A19ANF and
A19APC thermostats are
designed for a variety of
applications where rainproof
enclosures are necessary or
desirable.
IMPORTANT: The A19 Series
thermostats are intended to
control equipment under
normal operating conditions.
Where failure or malfunction
of an A19 thermostat could
lead to an abnormal
operating condition that
could cause personal injury
or damage to the equipment
or other property, other
devices (limit or safety
controls) or systems (alarm
or supervisory) intended to
warn of or protect against
failure or malfunction of the
A19 thermostat must be
incorporated into and
maintained as part of the
control system.
Features
Rainproof gasketed
enclosure is U.L. Listed for
outdoor use.
Liquid-filled element is
unaffected by barometric
pressure and cross-ambient
temperatures.
Dependable field proven,
snap-acting switch is rated
for inductive or resistance
loads (See Electrical Ratings
table).
Wide choice of range
options.
Simple strain-free mounting
on three rubber cushioned
mounting feet.
High temperature dial stop.
Copper bulb well available.
General Description
The thermostats have an
enclosed SPDT switch. The red
terminal is common.
Fig. 1 -- Interior of an A19ANC
thermostat.
R ed
(C omm on)
Blue
h
Yellow
R ed to B lue
O pens on
Tem perature
Increase
R ed to Yellow
C loses on
Tem perature
Increase
Fig. 2
– Designations and
Switch Action
The red to blue terminals open
on a temperature increase (See
Fig. 2).
Simultaneously, the circuit
between red and yellow closes.
The thermostats have an
adjustable high temperature
stop. A special wrench
(Part 836-61) required to adjust
the keyed stop is provided with
each thermostat.
The A19ANC and A19ANF
thermostats have a fixed
differential.
The A19APC thermostat has a
lever for adjustment of the
differential between minimum
and maximum values (See
Product Selection Chart).
Specifications
Type Number
A19ANC
SPDT Switch Action, Standard Differential (Fixed)
A19ANF
SPDT Switch Action, Close Differential (Fixed)
A19APC
SPDT Switch Action, Standard Differential (Adjustable)
Range, Maximum
Temperature and
Differential*
See Selection Chart
Capillary
.062” (1.6 mm) O.D. Standard Length is 10’ (3 m)
Enclosure
Rainproof with Gasketed Cover (NEMA 3R)
Finish
U.L. Listed Outdoor Gray Enamel
Material
.062” (1.6 mm) Cold Drawn Steel
Switch
Snap-Acting Contacts in Dust Protected Enclosure
Conduit Opening
Welded ¾” Female Connector
Wiring Connections
Screw Type Terminals
Mounting
Three Rubber Cushioned Mounting Feet
Shipping Weight
2.3 Lb (1.0 kg)
*Differential is based on direct bulb immersion in liquid at 1F
(0.6C
) per minute rate of change.
