Controls And Emergency Functions - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions

4.38 CONTROLS AND EMERGENCY FUNCTIONS

Figure 4-34: MODULEX EXT Panel Controls and Indicators
TABLE 4-8: Panel Controls and Indicators
ITEM
GLT (General Limit Thermostat): when enabled, it cuts the power supply to the
A
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 lamp of the Thermostatic Lockout from GTL (General Limit Thermostat).
E
Main Switch
Change-over Series/Parallel:
0 = Emergency is active or the control is managed by PLC or BMS.
F*
I = Series connection (the cascade is managed by the BCM)
II = Parallel connection (condition of supply).
In position "I" the plant will operate when requested at "CONSTANT SETPOINT":
G*
70°C – Max heat output 50%.
H*
Enables burner reset in case of lock-out.
YELLOW LED = Blinking = Communication between BMM and BCM is OK.
I*
GREEN LED = ON = Active Pump
RED LED
*See Chapter 5, section 5.2 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.
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09/15/2017
COMPONANT/FUNCTION
2 = 10 A
= ON = Failure Code Detected
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
OMM-0095_0H
GF-139