M&M has many systems running strong that were built in the late 1980’s and through the
1990’s. The majority of hardware being used at facilities is still being produced and/or
refurbished, but as with any electronic components, some parts are starting to become scarce
or have become obsolete.
Early generation control systems Version 1 (V1 & V1.5) contain components that are becoming
scarce or are no longer available.
Version 1 hardware includes control systems and control panels that were manufactured prior to
The physical LCD glass display and the keypad assembly of Version 1 control systems have
been discontinued by all suppliers. The microprocessor board can no longer be built due to
obsolete components. Therefore upgrades are recommended for ALL Version 1 controls systems.
The hardware and software compatibility built into our control systems allows M&M to make
upgrades a very cost effective solution.
It is important to M&M that we support our customers and help them modernize their systems
in a timely and cost efficient manor. In addition many new software features are available
which can help conserve energy and make the plant operation easier and more efficient. On older
equipment it is suggested to customers that they start upgrading the microprocessors on their
screw compressors first. This allows the hardware on those compressors to then be utilized as
replacements and spares for master controllers reducing the cost and delaying a complete master
change out. We have been upgrading several facilities with this approach and providing our
updated suite of software functions which focus on energy savings. The most common upgrades
- General Software Upgrades (Sequencer, Condenser, Evaporator, etc.)
- Energy Management Improvements (Load Shed Scheduling and Priorities)
- PC Software and Modem Upgrades – (off site access)
- PC Graphics Upgrades and Additions
- Hardware Upgrades
- And Others
Additional changes for consideration include:
- Monitoring of Additional Ambient Conditions (Humidity)
- Computations of Non-Condensables in System
- Condenser Control Based on Wet Bulb Temperature
- Changing Existing Single Speed Condenser Fans to VFDs
- Evaporator Fan VFD Control
- Compressor VFD Control
Some upgrades may require sensors or other equipment changes in the plant. Consultation with
an engineer might be necessary to identify the possibilities and examine the benefits. Since
many of these upgrades are focused on energy savings, often there may be rebates from the Power
Company to offset some if not all of the capital investment.
The majority of hardware being used at facilities is still being produced and/or refurbished,
but as with any electronic components, some parts are starting to become scarce or made
obsolete by the supplier. The physical glass LCD display and the keypad assembly of V1 control
systems have been discontinued by all suppliers. Additional the microprocessor board can no
longer be built. V1 controllers were manufactured prior to mid 1999. A suitable replacement is
not offered by our suppliers and an upgrade is recommended.