Rockwell Automation FANM FanMaster Energy Saving Package User Manual
Page 15
FanMaster Overview
1-9
Allen-Bradley® FanMaster™ Energy Saving Package Installation Manual -
Publication FANM-IN001B-EN-P – December, 2009 PN-65329
Multi-Stage Heating or Cooling Systems
If the HVAC system has heating or cooling elements which turn on in more
than one step (e.g., low heat or high heat) FanMaster should be configured
for proportional control. This will allow the fan to run at minimum speed if
the heating and cooling are off. The fan will step to a medium speed at low
heating or cooling and step to maximum speed at high heating or cooling.
The heating and cooling Delta T Max fields should be set to a value that
ensures that the fan actually achieves maximum speed when high heat and
high cool are on.
HVAC Systems With No Return Air (100% Outside Air)
HVAC systems that draw all the air from the outside are also known as
Makeup Air Units (MAU) and are not suitable for FanMaster installations.
FanMaster control algorithms cannot determine proper fan speeds for these
type systems and cannot be used.
HVAC Systems with Electric Heating Elements Instead of Gas
FanMaster control algorithms work with either gas or electric heating
elements; both on-off or modulating types. The FanMaster energy
calculator calculates heating costs based on the user provided cost per
MMBTU of gas. If the HVAC unit has electric heating, an acceptable
estimation of heating costs can be achieved by setting a value for gas cost to
double the prevailing utility rate (electric heat is typically twice the cost of
gas). This will allow the calculator to estimate the cost of electric heat and
thus the savings values as well. Note that the FanMaster energy calculator
results are presented for informational purposes only, and do not affect the
actual control of the fan speed.
City Climate Data
If one of the pre-loaded cities in the FanMaster database does not provide a
comparable climate for the installation location, data for a “custom city”
can be entered during configuration.
A Compact Disk containing weather data for approximately 2000 locations,
both US and worldwide, can be obtained from the National Oceanic and
Atmospheric Administration (NOAA) at this URL:
A list of cities in the weather database on the CD is found at this URL: