Mounting - PENN Controls - A421ABC - A421AEC - A421GBF - A421GEF - Electronic Temperature Control - A421 Standard Model

A421 Series Standard Electronic Temperature Controls Installation Guide

PENN Controls
Product name
A421 Standard Model
Document type
Installation Guide
Part number
Document revision
Revision date

Observe the following guidelines when you locate and mount an A421 Control:

  • Make sure that the mounting surface can support the control, DIN rail, mounting hardware, and any user-supplied panel or enclosure.
  • Mount the control in a vertical, upright orientation wherever possible. It is best practice to use DIN rail mounting for type 1 controls.
  • In direct-mount applications, mount the control on a flat and even surface.

Mount the control in a location free of corrosive vapors and observe the ambient operating conditions listed in Technical specifications for the A421 Control and the A99 sensor.

  • Allow sufficient space to connect and route wires, view the LCD, and use the touchpad.
  • Do not mount the control on surfaces that are prone to vibration or in a location where high-voltage relays, motor starters, other sources of electromagnetic emissions, or strong radio frequency may cause interference.
  • Do not install the control in an airtight enclosure.
  • Do not install heat generating devices with the control in an enclosure that may cause the ambient temperature to exceed 150°F (66°C).