Honeywell S7999B User Manual

65-0303-05

The S7999B and S7999C are microprocessor-based touch-

screen Operator Interface (OI) displays that provide an 

operator interface for monitoring and configuring parameters 

in the Sola Hydronic Control and Sola Steam Control system.

The S7999B can be used to monitor an individual boiler but is 

primarily used for multiple boiler applications in a lead/lag 

arrangement. COM 2 port is available for Building Automation 

applications. The S7999B display is flush mounted into a 

panel cutout (8-1/8 in. W x 5-7/8 in. H). Wiring connections to 

the S7999B are through a removable 9-pin wiring header.

The S7999C display is used for individual boiler monitoring. 

The S7999C is mounted:

• onto a panel using the wallplate provided.

• from the front into a panel cutout (7.6 in. W X 5.4 in. H) 

using 4 #6-32 screws and nuts (provided).

• From behind into a panel cutout (5.45 in. W X 4.3 in. H) 

using 4 #6-32 screws, nuts and 4 standoffs (provided).

Wiring connections to the S7999C are made via a 4-pin 

connector on the back of the display.

NOTE: If display S7999B is used to monitor a lead/lag sys-

tem, display S7999C can NOT be used.

— Allows switching view between multiple boilers

— Allows viewing Lead-Lag Master

— Ethernet port for downloading software upgrades 

(when required)

— Real-time data trending analysis and transferring 

saved trend data to Excel spreadsheet.

— Audible Alarm

— COM 2 Modbus port for Building Automation System 

applications.

— LED indicators:

• Power

• Network

• COM  2

• COM  1

— Models available:

• S7999B1026 has Blue Border

• S7999B1067 has Black Border