Electro Industries ELECTRO DUCT Installation Manual page 6

Green - 24 volt at "R", reference to "C".
Amber - Internal blower relay is pulled based upon an input
on either "W1", "X", or "W2".
Red (opposite stat terminal) - 24 volts (reference to "C") is at the terminal next to the red
light.
Top Red Light - First level hi-limit is open, overheat condition, insufficient airflow, dirty
filter, etc.
By measuring the temperature rise across this Electro-Duct (at a point high enough for proper
air mixing) the actual CFM can be quite easily determined. If you are having difficulties
sustaining hi-limit operation (clicking noise/top red LED) it may be a good idea to calculate the
CFM according to the formula shown at the top of the next page. To arrive at a stable outlet
temperature, you can turn off the source power and remove the smallest fuse. This will allow
you to verify or calculate the CFM without reaching the hi-limit cycling. The full amount of
elements are not required to use this formula. The accuracy of this formula will depend upon the
ability to measure the outlet air at a properly mixed and uniform spot and the accuracy of both
the clamp on amp meter (AC voltmeter).
CFM = volts x amps x 3.4
temp. rise x 1.1
REPLACEMENT PARTS
- PC Module, 2 stage
- PC Module, 3 stage
- Element, 4.8KW
- First hi-limit, 135F
- Dual hi-limit
- Fuse - 5ØA
- Fuse - 3ØA
12/20/2017
OPERATIONAL MONITOR LIGHTS
CFM CALCULATIONS
Part Number
DI66Ø5
DI66Ø6
EII# Ø6615
EII# Ø5636
EII# Ø663Ø
EII# Ø664Ø
EII# Ø5141
5
EI505