AERCO BMS II BOILER - Manual (Page 38)

OPERATION
3-6
I/O STATUS
I/O (Input/Output) STATUS is displayed as a hexadecimal number. The meaning of each bit is as
indicated below. The higher 4 bits, or most significant digit (MSD), indicate which inputs are activated.
The lower 4 bits, or least significant digit (LSD), indicate which relay outputs are activated.
MSD: Bit 7 =(empty)
Bit 6 = Interlock 1
Bit 5 = Interlock 2
Bit 4 = Setback
LSD: Bit 3 = (empty)
Bit 2 = Sys Start Relay
Bit 1 = Fault Relay
Bit 0 = Aux Relay
RETURN TEMP
The RETURN TEMP (°F) option is displayed only if an optional Return Sensor is installed in the boiler
water return line. When installed, it is connected to terminals 5 and 6 on the BMS II. This optional sensor
is used for external monitoring purposes ONLY.
3.5 SETUP MENU
The SETUP MENU permits the operator to set the unit password which is required to change any of the
menu options. To prevent unauthorized use, a previously entered password entry will time-out after 1
hour. Therefore, the password must be reentered when required. In addition to permitting password
entries, the Setup Menu is also used to enter the date and time. Descriptions of the Setup Menu options
follow.
ENTER PASSWORD
The ENTER PASSWORD option allows the Level 1 (159) or Level 2 (6817) to be entered.
Once the valid Level 1 password (159) is entered, options in all Menus, except the Calibration Menu, can
be changed.
The Level 2 password (6817) must be entered to view or change options in the Calibration Menu. Only
factory trained personnel should use this Menu.
Date and Time Menu Options
The Setup Menu options associated with date and time are as follows:
• SET MONTH
01 -12
• SET DATE
01 – 31
• SET YEAR
00 – 99
• SET HOUR
00 -23
• SET MINUTE
00 – 59
• SET DAY OF WEEK
SUNDAY TO SATURDAY