AERCO AERClean - Manual (Page 9)

Page 9
Benchmark Low NOx Series
AERClean Filtration System Instructions
Doc#
TID-0001-0A
Created: 10/13/2010 Revised: 11/11/2010 Owner: BS-Manager_V.D. DOC#: TID-0001-0A
Kit P/N 58034 - Dwyer Adjustable Differential Pressure Switch Kit
INTRODUCTION
The Series ADPS Adjustable Differential Pressure Switch enables the closing of an electrical con-
nection at a chosen pressure setting in order to activate an alarm or other relay operated device.
Available settings are from 0.08˝ w.c. (20 Pa) to 16 in w.c. (4000 Pa).
MOUNTING POSITION
Switch should be mounted vertically (pressure connections point down), which allows possible
condensation moisture to drain. If there’s no potential for condensate forming, then switch may be
mounted horizontilly, but only with the electrical connections pointing upwards. In the horizontal
position, the switching values are approximately 0.08 in w.c. (20 Pa) higher as indicated on the
scale.
NOTE:
Switch will NOT function properly if mounted horozontilly with electrical connections point-
ing down.
MOUNTING PROCEDURE
Switch may be mounted onto included bracket (P/N 33125) or directly to a wall or flat surface. If
mounting the switch directly to a surface, use four screws supplied to install through the four outer
monunting lugs. Do not tighten the screws so much that the base of the device is deformed.
Alternately, the switch may also be mounted to a flat surface using the four holes on the rear of the
switch, but ONLY use the screws provided in the kit (not exceeding 5/16 (8mm) in length).
INSTALLING HOSES
Pressure tubing cannot be kinked. Pay particular attention to this point if you run hoses over an
edge. It is better to form a loop. If the hoses are kinked, the device cannot function accurately.
ELECTRICAL CONNECTION
Work on electrical installations must only be carried out by electricians who are specifically trained
for this purpose.
CAUTION:
To avoid a possible fatal electric shock and damage to equipment, ensure there is no
voltage on the connecting cable while you are working on the electrical connections.
For connection to the pressure switch, two fittings on the switch housing are provided for hoses
with an internal diameter of 1/4˝ (6.0 mm). Connect a hose with the higher pressure to socket P1
which is located on the lower (closer to rear) section of the housing. Connect a hose with the lower
pressure to socket P2 which is located on the middle (closer to front) section of the housing. After
you have installed the hoses, it is essential to check for tightness of connection fit, and to ensure
that hoses are not kinked.
Connecting cable can be run from three sides. The screw cable connection has a plug-in design.
The seal is designed only for cables with diameters of 0.275˝ (7 mm) or 0.393˝ (10 mm).
If using a 0.275˝ (7 mm) cable, line up the press nut, plain washer and sealing ring directly on
cable. If using a 0.393˝ (10 mm) cable, you must first break the inner rubber ring out of the sealing
ring directly on the cable, then line up the press nut, plain washer and sealing ring on the cable.
The switching device in this pressure switch is designed as a change-over contact: When pres-
sure is decreasing (NC), pole 3 (COM) closes to Pole 1.
(Continued)