Penn MR5 Series Product Bulletin

Introduction
The MR5 Series Panel Mount Case Controller controls
compressor, evaporator fan, and defrost cycles to
maintain the temperature of refrigerated units. The MR5
Controller facilitates a defrost cycle and uses time or
temperature to control defrost termination. The MR5
Controller incorporates temperature management, defrost
management, evaporator fan management, and alarm
management control functions.
The MR5 Controllers include models that connect to the
Verasys Building Automation System (BAS) through
®
RS485 protocols. You can integrate these models with the
BAS to control and monitor every available MR5 Controller
function.
Figure 1: MR5 Controller
Features and benefits
Plain language programming
Displays a scrolling alphanumeric message system
that shows you what to program.
Adaptive or time-based defrost
Provides a choice between a conventional time-
based defrost or the more advanced adaptive
defrost. Adaptive defrost learns and automatically
adjusts the defrost schedule of your system to
improve efficiency.
Meets Title 24 standards
You can program the controller to determine
when to operate the fan or set the fan to off.
This feature provides better air circulation in the
conditioned space and meets energy efficiency
standards.
Alarming
Facilitates program adjustment for high
temperature conditions, low temperature
conditions, door open, refrigerant leaks, high
MR5 Series Panel Mount Case Controller Product
system pressure, low system pressure, and
sensor failures. Failure messages display in plain,
readable language.
Reporting and recording
Automatically records temperatures at set
intervals to improve food safety. You can also
create reports to show that food was stored at
the required temperatures. You can download the
recorded data to a USB drive, and use the data
for hazard analysis critical control point (HACCP)
purposes.
Program copy and firmware updates
To upload your preferred settings or to update
the controller's operating firmware, the CBL-MR5-
USB accessory plugs into the MR5 comm port and
provides a USB connection. For information about
how to connect the CBL-MR5-USB accessory to the
MR5 Controller refer to the MR5 Series Panel Mount
Case Controller USB Cable Instruction Sheet (Part No.
24-07664-03469).
Applications
You can use the MR5 Controller with reach-in coolers,
merchandisers, and display cases.
Important: Use the MR5 Series Controller only as
an operating control. Where failure or malfunction
of the MR5 Controller could lead to personal injury
or property damage to the controlled equipment
or other property, additional precautions must be
designed into the control system. Incorporate and
maintain other devices, such as supervisory or alarm
systems or safety or limit controls, intended to warn
of or protect against failure or malfunction of the
MR5 Controller.
Important: Utiliser ce MR5 Series Controller
uniquement en tant que dispositif de contrôle
de fonctionnement. Lorsqu'une défaillance
ou un dysfonctionnement du MR5 Controller
Régulateur risque de provoquer des blessures
ou d'endommager l'équipement contrôlé ou un
autre équipement, la conception du système de
contrôle doit intégrer des dispositifs de protection
supplémentaires. Veiller dans ce cas à intégrer de
façon permanente d'autres dispositifs, tels que
des systèmes de supervision ou d'alarme, ou des
dispositifs de sécurité ou de limitation, ayant une
fonction d'avertissement ou de protection en cas
de défaillance ou de dysfonctionnement du MR5
Régulateur.
Bulletin
LIT-12013106
2019-10-08
MR534AFDN, MR534AFDV