Delta Controls GR2 Installation, Operation & Maintenance Instructions Manual page 3

Junction Boxes
Various optional junction boxes can be provided and
are defined by the 5th character of the model code.
JUNCTION BOX
CODES 'C' & 'D'
4 MOUNTING
HOLES 4.5
mm DIA
SUITABLE
FOR M4
SCREWS
MAX HEAD
DIA 7.5 mm
Installation of electrical adaptors and ca-
ble glands to the electrical entry - when
Junction Box is fitted
The standard entry is a single 1/2" NPT - M thread.
Other non-ISO and tapered threads will have their
size and type stamped on the enclosure next to the
entry.
TAKE CARE TO SELECT AND INSTALL
ADAPTORS THAT DO NOT REDUCE THE
ENCLOSURE'S DEGREE OF PROTEC-
TION WHEN IN USE IN ZONE 1 HAZARD-
ATEX
OUS AREAS.
IT IS A SAFETY REQUIREMENT THAT AT
LEAST 5 FULL THREADS ARE ENGAGED
BETWEEN
GLAND OR STOPPING PLUG, AND THE
ELECTRICAL ENTRY WHEN THE UNIT IS
ATEX
IN OPERATION. NEVER OPERATE THE
UNIT UNLESS THIS CONDITION IS MET.
CONDUIT ENTRY
M20 x 1.5
Fig 1
Fig 2
THE ADAPTER, CABLE
www.delta-controls.com
Wiring
DISCONNECT ALL SUPPLY CIRCUITS
BEFORE WIRING
DO NOT EXCEED ELECTRICAL RATINGS
STATED IN LITERATURE AND ON NAME-
PLATES.
THE LEADS ARE FACTORY SEALED SO
IT IS UNNECESSARY TO SEAL THE CON-
DUIT TO THE CONDUIT NIPPLE. HOWEV-
ER, THE LEADS MUST BE SUITABLY
PROTECTED
DAMAGE AND TERMINATED IN A SUITA-
BLE JUNCTION BOX OR TERMINAL FA-
CILITY IN ACCORDANCE WITH LOCAL
AND NATIONAL CODES.
DUCTOR IS PROVIDED WITH AN IDENTI-
TY TAG. IF THESE BECOME DETACHED
REFER TO THE COLOUR CODE IN THE
WIRING DIAGRAM (FIG 3).
IF THE EQUIPMENT IS LIKELY TO COME
INTO CONTACT
SUBSTANCES, E.G. ACIDIC LIQUIDS OR
GASES THAT MAY ATTACK METALS OR
SOLVENTS THAT MAY AFFECT POLY-
MER MATERIALS, THEN IT IS THE RE-
SPONSIBILITY OF THE USER TO TAKE
SUITABLE PRECAUTIONS THAT PRE-
VENT IT FROM BEING ADVERSELY AF-
FECTED THUS ENSURING THAT THE
TYPE OF PROTECTION IS NOT COM-
PROMISED.
IOM-GR-A : AUGUST 2016
AGAINST MECHANICAL
EACH CON-
WITH AGGRESSIVE
Fig 3