AERCO BMS II BOILER - Manual (Page 51)

PROGRAMMING BMS II
4-1
CHAPTER 4 - PROGRAMMING BMS II OPERATING MODES
4.1 INTRODUCTION
Prior to programming, the BMS-II must be mounted and all required wiring completed. In addition, all
connections should be checked for accuracy. Once these items are completed, the BMS-II is ready to be
programmed for the desired mode of operation for the boiler plant. The steps for programming will vary
somewhat, depending on whether the Outdoor Reset, Remote Setpoint or Constant Setpoint operating
mode is selected.
NOTE
The Level 1 Password (159) must be entered prior to
programming the BMS II for operation in any of the modes
described in paragraphs 4.2 through 4.4. Refer to Chapter 3 for
instructions on password entry and basic menu processing
procedures.
4.2 OUTDOOR RESET MODE
The Outdoor Reset mode operates based on outside air temperature. In this mode, the header supply
water temperature will vary up or down in accordance with outside air temperature. Therefore, in order to
set up and operate in this mode, an outdoor air sensor MUST be installed. This mode requires entries to
be made in the Field Adjust Menu, Configuration Menu and Relay Menu. For Modulex installations an
entry will also be required in +the Calibration Menu. The required entries are as follows:
• FIELD ADJUST MENU
o HEADER SET MODE
o RESET RATIO
o BLDG REF TEMP
• CONFIGURATION MENU
o BOILER OPERATING MODE
o BLR START LEVEL
o BLR STOP LEVEL
• RELAY MENU
o SYSTEM START RELAY TEMP
• CALIBRATION MENU (Required Only For Modulex Installations)
o LOAD START PCT
The programming set-up instructions for the above menu options are provided in paragraphs which
follow.