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Inside Warmflo Board, Red LED's - The four red LED's next to the output connector, indicate
Stage 1, 2, 3, and 4 operation (Stage 1 is on the bottom).
EM-WU*****/EM-WD***** Inside Relay Board
COMMENT: This relay board relates to standard Electro-Mate, if this WF-LGR4 is connected to
the new Electro-Mate with a WF+ board, the internal relays and relay driver board are
totally different. The following does not apply, see description within the Electro-Mate
manual itself.
Inside Red LED - Illuminates when the low voltage hi-limit sensor probe opens. This applies
only after thermostat heat call and WarmFlo II controller is activating the various element stages.
If there is a hi-limit condition, red LED is illuminated. As soon as the hi-limit cools and snaps
back in, red LED extinguishes.
Triac Relay Module (under inside relay board)
This module has its own built-in LED. When the LED is on, the triac switch is closed, elements will be
heating. This LED shall operate coincident with Stage 1 on the WarmFlo board.
COMMENT: The relay board activates from the WarmFlo II main board as WarmFlo II interprets the
"Y" input voltage in relationship to both temperature sensor requirements. However, the "Y" input
also directly controls the Stage 1 triac and the staging relays. Whenever the "Y" input goes to 0 volts
(at the end of the cycle) the relay output immediately goes off and strip heat is turned off and not
necessarily stepped down as shown by the WarmFlo II monitor Red LED's. This is a safety feature;
strip heat cannot be accidentally kept on by WarmFlo II internal logic if there is no "Y" input.
01/10/2008
Monitor Light
13
HI321
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