A421 Series Standard Electronic Temperature Controls Installation Instructions
3
3.
Position the control mounting slots over the screw
heads, and then carefully tighten the mounting
screws to secure the control to the surface.
4.
When mounting the control on an uneven surface,
use shims to mount the control evenly on the
surface.
Additional Guidelines for Mounting Type 4X/IP66
Controls
The Type 4X models may be mounted to flat vertical
surfaces using the four holes at the enclosure corners.
Place the control against a flat wall surface in a suitable
location, and mark the mounting screw hole locations
on the mounting surface. Use appropriate screws and
shims to mount the control evenly on the surface.
On Type 4X models, select the knockout to be
removed. Place a screwdriver blade on the knockout
near the edge. Apply a sharp blow to the screwdriver
handle to loosen the knockout. Be careful not to
damage the control’s interior components.
An additional low-voltage, two-wire cable is required to
operate the A421 control’s temperature setback (BIN)
function. On Type 4X/IP66 enclosures, you must install
a suitable watertight fitting in an available knockout to
pass the two-wire cable through the enclosure wall.
The control enclosure base on the Type 4X/IP66
models can be easily rotated 180º relative to the
control enclosure cover and LCD, allowing you to bring
the electrical connection to either the top or bottom of
the mounted control.
Note:
Do not twist the wiring harness between the
enclosure base and cover more than 180º.
Wiring
!
WARNING: Risk of Electric Shock.
Disconnect or isolate all power supplies
before making electrical connections.
More than one disconnection or isolation
may be required to completely
de-energize equipment. Contact with
components carrying hazardous voltage
can cause electric shock and may result
in severe personal injury or death.
AVERTISSEMENT : Risque de
décharge électrique.
Débrancher ou isoler toute alimentation
avant de réaliser un raccordement
électrique. Plusieurs isolations et
débranchements sont peut-être
nécessaires pour -couper entièrement
l'alimentation de l'équipement. Tout
contact avec des composants porteurs
de tensions dangereuses risque
d'entraîner une décharge électrique et de
provoquer des blessures graves, voire
mortelles.
IMPORTANT:
Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.
IMPORTANT:
Do not exceed the A421 control’s
electrical ratings. Exceeding the electrical ratings
can result in permanent damage to the control and
void any warranty.
IMPORTANT:
Run all low-voltage wiring and
cables separate from all high-voltage wiring.
Shielded cable is strongly recommended for input
(sensor) cables that are exposed to high
electromagnetic or radio frequency noise.
IMPORTANT:
Electrostatic discharge can damage
A421 controls. Use proper Electrostatic Discharge
(ESD) precautions during installation and servicing
to avoid damaging A421 controls.
IMPORTANT:
Do not connect supply power to the
A421 controls before checking all wire connections.
Short circuits or improperly connected wires can
result in damage to the modules and void any
warranty.
