Page 1
Installation and Maintenance Instructions
2.0
2.9
WELDED STAINLESS
STEEL BODY
1/4 NPT MALE
WITH 9/16 HEX
Ø1.0
#
18 AWG – 12˝
W
IRE LEADS
GLASS-FILLED
POLYCARBONATE
UPPER HOUSING
BRASS LOWER
HOUSING WITH
1-1/8 HEX
Ø1.0
1/4 NPT MALE
2.3
2.8
for ASHCROFT®A-Series Miniature
Pressure Switches
FACTORY SET (APS) MODELS ONLY
tandard Ranges – 30IMV, 15, 30, 60, 100, 200, 400, 600, 1000, 2000 psi
S
APS-NS / APS-RS
ODUCTION
INTR
The APS pressure switch features an all-welded stainless steel
body (APS-NS/RS) or a machined brass pressure connection
le glass-filled polycarbonate upper hous
combined with a dur
ab
ing (APS-NS/RB). Located inside the upper housing lies one
(D/M) or two (DD/MM) SPDT general purpose or gold contact
snap acting switches.The deadband is fixed and the setpoint is
factory set.The APS pressure switch is supplied with various
pressure connections and electrical terminations.
ALLATION
INST
Torque should always be applied to the hex portion of the body
when installing, ne
er to an
v
y other par
t of the body f
or it ma
y
alter the setpoint. It is recommended that Teflon tape or other
sealant be used on the threads prior to installing to prevent
leaks in the system.
ELECTRICAL CONNECTION
The APS pressure s
witch is a
vailable with many various electri-
APS-NB / APS-RB
cal connections; wire leads (L), screw terminals (S), spade terminals (T) and a Form C DIN connector (H). Contact factory for
other special connection requirements.
-
When furnished with wire leads, the wires are color coded.
(White-Common, Blue-Nor
mally Open, Red-Nor
Refer to figure below for identification of terminals for screw,
spade and DIN connections.
When fur
the connector can be remo
the center of the connector, then pushing out the terminal block
nished with a DIN connector the terminal b
ed by first removing the screw from
v
through the hole in the top of the connector to force it out the
bottom. Attach wires to the terminal block then insert terminal
block back into housing.
e all connections according to the figures below and
Mak
circuit requirements.
Note: Since v
acuum models are already abo
atmosphere
, the Common and Nor
cuit will be closed as received.
e the setpoint at
v
mally Open (NO) cir-
mally Closed.)
k of
loc
© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel:203-378-8281, Fax:203-385-0499, www.ashcroft.com
All sales subject to standard ter
ms and conditions of sale
I&M009-10045-10/00 (250-2966)
.
AMR 12/07
Page 2
Installation and Maintenance Instructions
NORMALLY
CLOSED
NORMALLY
OPENED
COMMON
MARKED
W/WHITE DOT
COMMON
NORMALLY OPENED
NORMALLY
CLOSED
.25
.43
12
6/250
3
GDS N
1
2
S
R
Ø1.0
3.2
2.4
Ø1.0
3.7
2.9
AVAILABLE IN
BOTH BRASS AND
STAINLESS STEEL
for ASHCROFT®A-Series Miniature
Pressure Switches
1 – COMMON
2 – NORMALLY CLOSED
3 – NORMALLY OPEN
SCREW TERMINALS
OTHER OPTIONS
NORMALLY CLOSED
NORMALLY OPEN
LOAD 1
LOAD 2
SP ADE TERMINALS
COMMON
LINE VOLTA GE
WIRING DIAGRAM
FORM “C”
DIN CONNECTOR
© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel:203-378-8281, Fax:203-385-0499, www.ashcroft.com
All sales subject to standard terms and conditions of sale.
I&M009-10045-10/00 (250-2966) AMR 12/07
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