AERCO Modulex EXT 1530 - 3060 - Manual (Page 70)

MODULEX EXT 1530, 1912, 2295, 2677, 3060 Boilers
Installation, Operation & Maintenance Manual
3.38 Controls and Emergency Functions
Figure 3-34: MODULEX EXT Panel Controls and Indicators
ITEM COMPONANT/FUNCTION
A
GLT (General Limit Thermostat): when enabled, it cuts the power supply to 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 2 = 10 A
D Warning lamp of the Thermostatic Lockout from GTL (General Limit Thermostat).
E Main Switch
F*
Change-over Series/Parallel:
0 = Emergency is active or the control is managed by PLC or BMS.
I = Series connection (the cascade is managed by the BCM)
II = Parallel connection (condition of supply).
G*
In position “I” the plant will operate when requested at “CONSTANT SETPOINT”:
70°C – Max heat output 50%.
H* Enables burner reset in case of lock-out.
I*
YELLOW LED = Blinking = Communication between BMM and BCM is OK.
GREEN LED = ON = Active Pump
RED LED = ON = Failure Code Detected
*See section 4.2 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.
Page 70 of 138 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0095_0E
12/01/14 Phone: 800-526-0288 GF-139