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Modulex Light Commericial Series
CHAPTER 4: Installation Instructions
4.40 CONTROLS AND EMERGENCY FUNCTIONS
Figure 4-44: MODULEX EXT Panel Controls and Indicators
ITEM
Manual Reset High-Limit switch:
A
the boiler and lights the warning lamp (Item D). To reset, remove the cap and
push the reset button.
B
Main Power Switch
C
Fuses: 1 = 6.3 A
D
Warning light of the High-Limit switch
E
E8 Controller Module
F
Pressure gauge (not available in the U.S. and Canada)
Change-over Series/Parallel:
0 = BCM is the primary controller
G*
I = Do not use
II = E8 is the primary controller
Position "I" activates constant setpoint backup if BCM/E8 fails
H*
I*
BCM fault reset switch
YELLOW LED = Blinking = Communication between BMM and BCM is OK.
J*
GREEN LED
RED LED
*See section 5.2, below, for more information regarding the BCM (Boiler Communication
Module).
NOTE:
The emergency function enables the boiler's burners to fire only at 50% and at 50°C in system
return. All the system's heating loads, including the header pump, must be controlled manually.
OMM-0087_J • GF-143 • 11/17/2020
Legend to Figure 4-44
COMPONENT / FUNCTION
When enabled, it cuts the power supply to
2 = 10 A
= ON = Active Pump
= ON = Failure Code Detected
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