Operation - Delta Controls S24 Installation, Operation & Maintenance Instructions Manual

End of line resistors
Some products may be supplied to order fitted with
end of line resistors. Resistors in use may generate
a heat source. The type, quantity,
fitment method and allowable electrical loads are
limited by the scope of the certification.
NEVER FIT END OF LINE RESISTORS OR
MODIFY
DELTA CONTROLS
ATEX
Replacing cover / lid on Flameproof
enclosures
BEFORE CLOSING THE LID:

ENSURE WIRE IS CLEAR OF ALL
MOVING PARTS.

ENSURE
TOUCH THE LID AS IT IS CLOSED.
Thread, seal and contact surfaces may be lightly
lubricated using a non-setting non-corrosive grease
compatible with the lid seal.
DO NOT
GREASE ON ALUMINIUM.
ATEX
Before connecting to electrical power, screw on
cover/lid hand tight making sure that mating
surfaces of the lid and enclosure are in contact. Use
the locking screw provided to prevent casual and
unauthorised removal of the cover/lid.
IT IS A SAFETY REQUIREMENT THAT AT
LEAST 5 FULL THREADS ARE ENGAGED
BETWEEN THE COVER / LID AND THE
ENCLOSURE WHEN THE UNIT IS IN
ATEX

OPERATION.

UNIT UNLESS THIS CONDITION IS MET.
OPERATION
THIS UNIT CONTAINS POTENTIALLY
SPARKING
REMOVE THE COVER / LID WHILE
ELECTRICAL POWER IS CONNECTED
ATEX
TO THE SWITCH AND / OR WHEN A
FLAMMABLE
PRESENT.
Adjustments
Pressure and Temperature Switches are supplied
calibrated at the midpoint of their range and to a
falling pressure or temperature unless otherwise
specified.
Set point adjustments (All Models)
(See fig. 2A and 2B)
1. Isolate the instrument from process and power.
Remove the lid to allow access
2.
Slacken the set point lock screw.
3.
configuration,
WITHOUT REFERENCE
THAT WIRES DO
USE COPPER BEARING
NEVER OPERATE THE
CONTACTS. DO
GAS ATMOSPHERE
:
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4. Using a suitable spanner, rotate the range
adjuster clockwise to increase the set point and
counter-clockwise to decrease the set point.
5. Tighten the set point lock screw.
TO
NOT
Switching differential adjustment
(Model S22 only):
1.
Isolate the instrument from process and power.
2.
Remove the lid to allow access
3.
Rotate the knurled plastic wheel on
microswitch to adjust the switching differential.
Rotate clockwise to increase differential and
NOT
counter-clockwise
Note: Rotating the knurled plastic wheel will alter
the operating value on rising pressure only.
IS
Note: For accurate setting of Pressure and
Differential Pressure models, a suitable pressure
gauge must be used in conjunction with the above
procedure. Do not attempt to set the switch outside
the scale limits. For Temperature models a suitable
calibrated temperature source should be used.
IOM-INDUSTRIAL REV.C: MAY 2015
to reduce
FIG. 2A
FIG. 2B
the
differential.