Install Instructions

&(!"#!$#" 076- ???,?A-:16;<+75
'B#($" )@ -5)1416.7,?A-:16;<+75
6-7.7=:57;<878=4): differential pressure switches is now available
with a DPDT switch. The 1831 combines small size with 4% set point
repeatability. Absolutely no power is required to operate the DPDT
switch. Set point adjustment on the switch is easily accessible for
modifying the set point. A mounting bracket is included for simplified
installation.
$C!"# !##%#C!"
Models with “manual reset” are DPDT configuration and operate as
follows: If differential pressure increases above the set-point, the snap
switch is actuated or latched so N.O. contacts are closed and N.C.
contacts are open. They will remain in that condition even if differential
pressure decreases below the set-point until manually deactuated by
reset lever.
"# ##!"
The reset lever can act as a test feature during system installation or
maintenance, even if set point threshold is not exceeded. A periodic
lever override is recommended to ensure proper switch performance.
Pushing the lever to the right (when viewed from the cover side of the
switch with the ports pointed down) will cause the switch to change state,
simulating a condition in which the set point threshold has been
exceeded. The lever then must be manually reset, pushing the lever to
the left to deactuate the switches to complete the override procedure.
$# If the switch set point threshold has been
exceeded and the lever is in the tripped position on the right,
the lever can be moved to the left position and manually held
by the user, overriding the alarm condition as long as the
user holds it there. If the switch set point threshold is still
exceeded and the operator releases the reset lever, it will
pull back to the tripped position on the right and remain in
that location until the set point has dropped below the set
point threshold and the user resets the lever normally.
" #"
"-:>1+-Air and non-combustible, compatible gases.
6>1:765-6< Intended for indoor use.
&-<<-,)<-:1)4;Consult factory.
#-58-:)<=:-151<;-30 to 180°F (-34.4 to 82.2°C).
:-;;=:-151<;10 psig (68.95 kPa) continuous; 25 psig (172.4 kPa)
surge.
=51,1<A151<; 80% RH (non-condensing).
4<1<=,-151<; 6560 ft (2000 m) max.
"?1<+0#A8-2 SPDT.
+<=)<176#15-1..-:-6+- 1 millisecond maximum actuation delay
between contacts.
!-8-)<)*141<A±4% max of setpoint.
4-+<:1+)4!)<16/4A resistive @ 125/250 VAC (~); 50/60 Hz. 3A
inductive 30 VDC ( ); 5A resistive 30 VDC ( ).
4-+<:1+)4766-+<176;Screw type terminal block.
6;<)44)<176)<-/7:A II (transient over-voltage).
:7+-;;766-+<176;1/8˝ female NPT.
7=6<16/:1-6<)<176Diaphragm in vertical position. Consult factory
for other position orientations. Mounting bracket included.
"-< 716<,2=;<5-6<Screw type inside mounting spud.
&-1/0<1 lb 2 oz (522 g).
"-:1-;7?1..-:-6<1)4 :-;;=:-"?1<+0-;
"8-+1.1+)<176;6;<)44)<176)6,8-:)<16/6;<:=+<176;
=44-<16 
"
-:1-;C8:-;;=:-;?1<+0
4
-3/8
[111.13]
2X 3-1/16
[77.79]
1
-5/8
[
41.28]
4-1/16
[103.19]
2
X Ø7/8
CONDUIT OPENING
2-5/32
[54.76]
CLEARANCE FOR
COVER REMOVAL
3-11/16
[
93.65]
R
ESET
LEVER
3-5/8 [92.08]
1-3/32 [27.76]
1
-7/64 [28.17]
1
/2 MALE NPT
MOUNTING STUD
1
/8 FEMALE NPT
LOW PRESSURE
C
ONNECTION
1
/8 FEMALE NPT
HIGH PRESSURE
O
PENING
ø
.875 [22.23]
2X ø9/64 [3.57]
2
2
-3/4
[
69.86]
3
-1/4
[
82.55]
3
/4
[
19.05]
3-3/16 [80.98]
3
X 2
[
50.80]
2-5/16
[58.74]
A
-389 MOUNTING BRACKET
-;+:18<176
Direct current
Alternating current
Protective conductor terminal
On (supply)
Off (supply)
"A5*74
@84)6)<1767."A5*74;
~
=*41+)<176
IEC 50417 - 5031
IEC 50417 - 5032
IEC 50417 - 5019
IEC 50417 - 5007
IEC 50417 - 5008