Honeywell Local Operator Interface S7999B Users Manual 65 0303—05 S7999C SOLA

S7999B to the manual 456a2910-1b89-498d-8cf2-13e9a7b07b76

2015-01-23

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S7999B, S7999C SOLA
Local Operator Interface
PRODUCT DATA
• 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 system, display S7999C can NOT be used.

FEATURES
• Individual boiler status, configuration, history, and
diagnostics.
• Allows configuration and monitoring of the Sola
Controls (R7910A Hydronic Controls or R7911 Steam
Control) burner control sequence, flame signal,
diagnostics, historical files, and faults.

APPLICATION
The S7999B and S7999C are microprocessor-based touchscreen 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).

• S7999B OI Display only:
— 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
• S7999C OI Display only:

Contents
Preface .............................................................................
Specifications ...................................................................
Installation Instructions (S7999B OI Display) ...................
Wiring (S7999B OI Display) .............................................
Starting the S7999B OI Display ........................................
Configuration ....................................................................
Details ..............................................................................
R7910A or R7911 Diagnostics .........................................
S7999B or S7999C Display Setup and Diagnostics .........
Advanced Setup ...............................................................
Table 61 Configurable Parameters. ..................................
Table 62 Other Tables. .....................................................

2
3
4
4
7
20
38
44
47
48
53
61

65-0303-05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

—

MMC Port for installing software upgrades (when
required)
— LED indicators:
• Power
• COM
— Models available:
• S7999C1008 has white border
• S7999C1016 has blue border
• S7999C1040 has black border
• Allows for lead/lag commissioning.

Use the Product Data Sheet for the Sola Controls (form 650303) as a guide and explanation of the parameters that are
being programmed.

SOFTWARE UPGRADE
S7999B Only
You can download new software for the OI Display through
the Internet. Downloading software should only be done when
recommended by Honeywell. This feature is intended to
permit field upgrades for bug fixes and to install new features.

• Locates attached boiler(s).
• Allows boiler naming.
• Color 3.5 in. x 4.625 in. (5.7 in. diagonal) user interface
display.

Requirements for downloading new software:
• Ethernet connection for Internet access (RJ45 male
connector). Carefully insert the RJ45 connector into the
Ethernet jack in the lower right corner on the back of the
display to ensure no damage to the jack.
• Dynamic IP addressing (from DHCP server).

• Graphic user interface.
• Touch screen.
• Communication between the OI Displays and the
SOLA Controls uses Modbus™.

IMPORTANT
If these requirements can’t be met at the location of
the OI Display, this procedure should not be done or
the OI Display should be moved to a location where
these requirements can be met. Failure to satisfy
these requirements can result in the OI Display
becoming inoperable when the upgrade steps are
followed.

• LED indicators (S7999C):
• Power
• COM
• Flush mounting.
• Touch screen disable for screen cleaning.
• 12 Vdc power supply (included).
• Screen saver.

The above requirements can be checked prior to execution of
the software upgrade procedure on the Ethernet Setup page
(see Advanced Setup section). On the Ethernet Setup page a
connectivity check can be performed to validate whether
access to the Honeywell server is possible.

• Contrast control.
• Volume control.

PREFACE

The OI Display must be reset to initiate the download
procedure. Initial boot procedure of the device permits the
user to enter into Advanced Startup options within the first five
seconds after power up.

This User Guide is intended to provide a general overview of
the S7999B or S7999C Operator Interface (OI) Displays. The
general overview goes to page 20 and the actual configuration
begins on page 20.

Follow these steps:
1. Select the Advanced Startup Options button. A Warning
message is displayed. If you don’t want to proceed with
the software upgrade, you can cancel the procedure at
this time.
2. Select OK to proceed.
3. Select the “Force Application Update” checkbox.
4. Deselect the “Use Existing Application” checkbox.
5. Select the Continue button.

It is intended to guide you through the features and operation
of the OI Display as you interface with the R7910A or R7911
Sola control and establish the Parameter points of the system.
Note that this sheet shows all parameters. The actual product
may have parameters made invisible or Read Only by
Honeywell as they may not apply to the product.

ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Storage/Shipping Temperature: -40°F to 158°F
(-40°C to 70°C).

The software upgrade is automatic after the above steps. The
OI Display connects to the Honeywell server, which verifies the
configuration file, erases the old application and downloads the
new one.

Humidity:
85% maximum relative humidity.

The OI Display may have difficulty finding the new
configuration file at first. In this case, the procedure
automatically starts over again until it works.

Approvals:
FCC Part 15, Class A Digital Device
Underwriter’s Laboratories, Inc. (UL) (cUL) Component
Recognized (for non-continuous operation): File Number
MH20613 (MCCZ)
Canada: ICES-003

S7999C Only
Software upgrades for S7999C OI Display (when needed) will
be provided by Honeywell and are accomplished through the
MMC port located on the top back of the device.

Dimensions: See Fig. 1.

Replacement Parts (S7999B)

SPECIFICATIONS

• 9-pin connector—50020034-001
• Power Supply—Manufactured by MeanWell,
Model S-25-12 (order from manufacturer).
• #6-32 X1-in. screws(4) with nuts (4)

Electrical Ratings:
+12 Vdc input, maximum of 500 mA current drain.
Included Power Supply for S7999B:
Inputs: 85 to 264 Vac, 47 to 63 Hz; 120 to 370 Vdc.
Output: 12 Vdc; 0 to 2.1 A.
Power: 25 W.
Included Power Supply for S7999C:
Inputs: 100 to 240 Vac.
Output: 12 Vdc; 0.42 A.
Power: 25 W.

Supplied Parts (S7999C)
• Mounting Plate - see Fig. 9 for dimensions and hole
locations.
• #6-32 X 1-in. screws (4) with nuts (4)
• Standoffs 5/16-in. dia. X 3/8 in. long (4)
• Power Supply—Manufactured by V-infinity
Model FSC-S5-12U (order from manufacturer).

Operating Temperature: 32°F to 122°F (0°C to 50°C)

9-7/16 (240)
8-15/16 (227)

7-19/32 (193)

3-1/2
(89)

6-21/32
(169)

5-13/32
(137) 1

PANEL HOLE CUTOUT SIZE 7-19/32 (193) WIDE X 5-13/32 (137) HIGH FOR S7999B DISPLAY 7.6 WIDE X 5.4 HIGH..

1-33/64
(39)

M29867A

Fig. 1. OI Display dimensions (S7999C shown) in in. (mm).
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be
3

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

required to correct the interference at his own expense.

COM2 (a)

COM2 (b)

N/C

Read all documentation carefully and respond appropriately to
all error messages.

COM1 (a)

The OI Displays contain software that incorporates many
features that are designed to guide you safely through the
commissioning process. Safety, however, is your responsibility.

COM1 (b)

+12V

SAFETY FEATURES

COMMON (c)

This Class A digital apparatus complies with Canadian ICES-003.
Cet Appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

WARNING

Explosion Hazard.
Improper configuration can cause fuel buildup and
explosion.
Improper user operation may result in PROPERTY
LOSS, PHYSICAL INJURY or DEATH.

M28859A

Fig. 2. S7999B OI Display connector terminals.
7.

Using the OI Displays to change parameters, must be
attempted by only experienced and/or licensed
burner/boiler operators and mechanics.

8.
9.
10.

INSTALLATION INSTRUCTIONS
(S7999B OI DISPLAY)

11.
12.

NOTE: For S7999C OI Display installation instructions, see
page 9.

13.

Mounting the S7999B OI Display and
Power Supply

WIRING (S7999B OI DISPLAY)

The OI Display can be mounted on the door panel of an
electrical enclosure.
1.
2.
3.
4.
5.
6.

Select a location inside the enclosure for mounting the
power supply.
Using the power supply as a template, mark the locations of the two mounting holes in the enclosure.
Remove the power supply.
Drill 1/4 in. holes through the panel at the marked locations and secure the power supply with the two #6-32
screws and nuts provided.
Remove the 9-pin connector plug from the back of the OI
Display.
Wire the connector to the power supply and the RS-485
cables using the wiring diagram in Fig. 3.
Ensure the 9-pin connector plug is aligned with the
header pins when inserting the 9-pin connector plug
back onto the Display. Secure firmly.

The S7999B OI Display must be appropriately wired for both
power and communications. An external 12V power supply
(provided) with an appropriate power rating is connected to
pins 1, 2 and 3 to power the device.

Select the location on the door panel to mount the display; note that the device will extend into the enclosure
at least one inch past the mounting surface.
Provide an opening in the panel door 8-1/8 in. wide by 57/8 in. high.
Place the OI Display in the opening and use it as a template to mark the location of the four mounting screw
holes. Remove the device.
Using pilot holes as guides, drill 1/4 in. holes through the
door panel.
Place the display in the opening, aligning the mounting
holes in the device with the drilled holes in the panel.
Secure the display to the panel with four #6-32 screws
and nuts provided.

Communication is done over a RS-485 bus:
• COM1 connected directly to the SOLA Device J3 connector
to either Modbus (MB1 or MB2).
• COM2: A bus to the Building Automation System.
See Fig. 2 for S7999B Display connector terminals. Wiring
connections are listed in Table 1. See Fig. 3 for wiring.
Table 1. 9-pin Connector Terminals
Pin #

65-0303—05

Function

12V input

Common (Power, COM 1)

COM 1 (b) to MB1 or MB2 terminal

COM 1 (a) to MB1 or MB2 terminal

Not used

COM 2 (a)

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 1. 9-pin Connector Terminals
Pin #
9

Function
COM 2 (b)

S7999B
AS LOCAL DISPLAY
COM2

COM1
120
VAC

+12

GND
(C)

(B)

(A)

L1
L2

6
N/C

N/C

(A)

(B)

BAS

MEAN WELL S-25-12
POWER SUPPLY

NEUTRAL (L2)

120VAC (L1)

EARTH
GROUND
12 DC OUT +

V+

DC OUT
(COMMON GND)

V-

2
A

B
MB1

V ADJ

1
B

MB2

ECOM J3

SOLA CONTROL
WIRING KEY
LINE VOLTAGE
LOW VOLTAGE
DATA

DO NOT CONNECT THE S7999B TO TERMINALS 1 2 3. THIS WILL RENDER THE DISPLAY INOPERABLE.

DISPLAY CAN ALSO BE CONNECTED TO MB2; A, B, C.

M32004

Fig. 3. S7999B wiring diagram.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

S7999B
120
VAC

L1
L2

MEAN WELL S-25-12
POWER SUPPLY

AS SYSTEM DISPLAY
COM1

NEUTRAL (L2)

120VAC (L1)

COM2

+12

GND
(C)

(B)

(A)

N/C

(A)

(B)

EARTH
GROUND
12 DC OUT +

V+

DC OUT
(COMMON GND)

V-

VADJ
A
WIRING KEY

DO NOT CONNECT THE S7999B TO TERMINALS 1 2 3.
THIS WILL RENDER THE DISPLAY INOPERABLE.

DISPLAY CAN ALSO BE CONNECTED TO MB2; A, B, C
AND THE SOLA SLAVES NEED TO BE WIRED TO MB1.

SOLA LL MASTER
AND SLAVE 1

MB1

ECOM J3

MB2

LINE VOLTAGE
LOW VOLTAGE
DATA

B
MB1

ECOM J3

MB2
SOLA SLAVE 2

CONTROLLER HAS TWO AVAILABLE MODBUS
CONNECTIONS: THIS CONFIGURATION REQUIRES ONE
FOR CONTROL LEAD LAG COMMUNICATION AND ONE
FOR A S7999B SYSTEM DISPLAY.
THERE IS NOT A CONNECTION AVAILABLE FOR A
LOCAL TOUCHSCREEN DISPLAY (S7999C).
A

THE ECOM CONNECTION IS AVAILABLE FOR
CONNECTIONS OF A LOCAL KEYBOARD
DISPLAY MODULE.
4

MB1

ECOM J3

MB2
SOLA SLAVE 3

UP TO A MAXIMUM OF 8 SOLA SLAVES IN A
LEAD LAG NETWORK.

A
4

MB1

MB2

ECOM J3

SOLA SLAVE 4
M32005

Fig. 4. S7999B wiring diagram for lead lag.

BUILDING AUTOMATION
SYSTEM (BAS)
CONFIGURATION

Ensure all S7999B devices have unique Modbus addresses as
defined in Fig. 5.

Connect the BAS Modbus wiring to COM2 of the S7999B as
shown in Fig. 5.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

BAS

COM 2

S7999B

COM 1

1
SOLA

2
SOLA

UP TO 8
SOLAS

4
SOLA

SOLA

EACH SOLA IN THE BAS WILL HAVE A DIFFERENT MODBUS ADDRESS.
M32006

Fig. 5. S7999B in a Building Automation System.
If the screen is dim, check the pin 1 and 2 wiring connections.

BAS Modbus message timeout should be set to 1.0 seconds or
higher. This means it could take up to 1.0 seconds (max) for
the System Display to reply to a BAS message.

NOTE: An Advanced Startup screen displays for five seconds
after power-up before the Home page displays. This
screen allows the user to upgrade the software in the
System Display (see “Preface” on page 2) and should
normally be bypassed.

Retries: BAS must setup retries upon timeout to ensure the
Modbus request is accepted.
BAS Modbus poll rate should be set to 1.0 seconds. This
means that the BAS should wait for a minimum of 1.0 seconds
after receiving a Modbus message from Sola before sending a
new Modbus message.

Three LEDs exist for I/O traffic: one for the Ethernet network
port and two for Modbus™ ports. The ethernet port should only
be used if instructed by Honeywell that an update is necessary.
Modbus Com Port 2 is not active on this device.

QUICK SETUP (S7999B OI
DISPLAY)
1.
2.

1.
2.

Make sure the S7999B 9-pin connector is properly
aligned and pressed firmly in place.
Make sure the wires between the 9-pin connector and
the controller are properly wired and secure.

WARNING

Home Page (S7999B OI Display)

Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Line voltage is present at the 120 Vac power supply.

Make sure the Power and COM1 LEDs are blinking.
If the LEDs are not blinking:
a. Make sure the proper connections have been made
between the Modbus COM1 Port and the first controller device in the Modbus network.
b. See “Wiring (S7999B OI Display)” on page 4 for
proper wiring of the OI Display 9-pin Header
Connections.
If connected to a BAS application, COM2 LED will blink
indicating BAS traffic.

Make sure a screen similar to Fig. 6 appears after the OI
Display has completely powered up.
On System applications, each SOLA Control is represented on
the Home page by an icon and name. Pressing the icon allows
the user to zoom in on that boiler and see its specific details.
These details are provided on a new page, which can include
additional buttons that display additional detail and operation
information, which itself leads to other pages. The pages are
traversed in a tree structure method, as shown in Fig. 8.

Make sure the power supply is connected securely to the
120 Vac power source.

STARTING THE S7999B OI
DISPLAY

The Sola icons will appear in one of four colors indicating the
boiler status.

Power-up Validation

• Blue: Normal operation
• Red: Lockout condition
• Gray: Standby mode (burner switch off)

The Home page will appear and the “Power” LED will be
blinking when the device is properly powered. Select the 1234
Setup button to adjust the contrast and sound as desired.
7

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

• Gray and crossed out: communication error (disconnected
or powered off)
Up to 8 Systems can be displayed on the Home page. The
name of each boiler is displayed next to the Sola icon button.
When Lead Lag is enabled, the system header temperature
and firing rate are displayed for each System. When the burner
is in standby or not firing the firing rate is not displayed.
NOTE: The boiler name may be cut off on the Home page
when all icons are present.
The Home page also includes a System Analysis button that
allows the user to view status information on a system-wide
(that is, multiple boiler) basis. The user can choose which
status information to compare from the SOLA Controls in the
system.
Pressing the 1 2 3 4 Setup button on the Home page displays
miscellaneous setup and diagnostic functions beginning on
page 47 (see also Table 61 on page 53). It also contains the
setup configuration for BAS applications, under the Advanced
Setup button.

Fig. 6. S7999B Home page (Boiler 1 in normal operation).

Pressing the SOLA icon opens that control’s status page. Go to
“Configure Button” on page 13 to continue.

Fig. 7. S7999B Lead Lag Home page.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

HOME
PAGE

1234
SETUP

PROGRAM
MODULE

KEY

CLEAN
SCREEN

BUTTON FLOW
BACK ICON FLOW
HOME ICON ALWAYS TAKES
YOU TO THE HOME PAGE

SYSTEM
CONFIG.

SUMMARY
PAGE

ADVANCED
SETUP

CONFIGURE

Configuration
Groups

Logout

OPERATION

DIAGNOSTICS

DETAILS

HISTORY

Diagn.
Test

History

Burner
Control

Alerts

Lockouts

Diagn.

Alerts

Analysis

Silence

DHW

Digital
I/O

MODULATION

SETPOINTS

PUMPS

?
Verify

Analog
I/O

M13965

Fig. 8. S7999B display page flow.

INSTALLATION INSTRUCTIONS
(S7999C OI DISPLAY)

2-3/4 (70)
1/2
(13)

NOTE: For S7999B OI Display installation instructions, see
page 4.

1-21/32
(42)

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).

3-13/64
(81)

1-13/16 (46)

Mounting the S7999C OI Display
using the wallplate (provided)
1.
2.
3.
4.
5.

M27606

Fig. 9. S7999C wallplate dimensions in in. (mm).

Select the location to mount the OI display; this could be
a location up to 1000 feet from the SOLA control.
Use the device wallplate as a template to mark the location of three or four mounting screw holes. See Fig. 9.
Drill 3/16 in. holes for mounting the wallplate.
Secure the wallplate with three or four #6-32 screws.
Bring power and communication wire through the wall
plate and attach to the terminals on the back of the display before installing the display to the wall plate.

Mounting the S7999C OI Display
directly to the Door Panel
1.
2.

Select the location to mount the display.
Cut an opening to facilitate mounting the display into the
door panel. See Fig. 1 for the dimensions for mounting
the display from the front of the door. See Fig. 10 for
mounting the display to the back of the door. If desired,
cut a notch so the LEDs will be visible as well. Tear off
templates are also available on the back pages of this
Manual (see Fig. 121 on page 63 and Fig. 122 on page
65).
Fit the display into the opening and use the screw holes
in the device as a template to mark the location of the
four mounting screw holes.
65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Drill 3/16 in. holes for mounting the display.

Secure the OI Display to the panel using the four #6-32
screws and nuts, as shown in Fig. 10. (Standoffs are provided for mounting the OI Display from the back of the
door.)
CUTOUT

OPTIONAL
CUTOUT

SPACER (4)

WALL

M29868

Fig. 10. Mounting the S7999C OI Display behind the door panel.

S7999C OI Display Power supply
mounting.
1.
2.
3.
4.

Table 2. 4-pin Connector Terminals (located on the
back of the S7999C OI Display).
Pin #

Select a location inside the enclosure for mounting the
power supply.
Using the power supply as a template, mark the locations of two mounting holes in the enclosure.
Remove the power supply.
Drill 1/4 in. holes through the panel at the marked locations and secure the power supply with the two #6-32
screws and nuts provided.

WIRING (S7999C OI DISPLAY)

12Vdc input

12Vdc Input

Data (+) Output (Modbus a)

120
VAC

The S7999C OI display must be appropriately wired for both
power and communications.
1.

65-0303—05

N
L

V-INFINITY
FSC-S5-12U

V+
V–

S7999C CAN BE
S7999C MIDCONNECTED TO
LEVEL DISPLAY EITHER MB1 OR
Y + − G MB2 A, B, C
TERMINALS

1
A

B C A B C 1 2 3
MB2
MB1
ECOM J3
R7910 HYDRONIC CONTROL OR
R7911 STEAM CONTROL

DO NOT CONNECT S7999C TO TERMINALS 1 2 3 AS THIS WILL RENDER
M32008
THE DISPLAY INOPERABLE.

Fig. 11. S7999C wiring diagram.

WARNING

Table 2. 4-pin Connector Terminals (located on the
back of the S7999C OI Display).
Y

WIRING KEY
LINE VOLTAGE
LOW VOLTAGE
DATA

Wire the power supply and the RS-485 communication
cables per Table 2 and the wiring diagram in Fig. 11.
• Y and G are connected directly to the display and
either SOLA Control connector J3 Modbus (MB1) or
Modbus (MB2).
Make sure the 12 Vdc power supply (supplied with the
S7999C) is connected securely to the 120 Vac power
source.

Pin #

Function

Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Line voltage is present at the power supply.

Function
Data (-) Output (Modbus b)
10

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

S7999C
MID-LEVEL DISPLAY
Y

120
VAC

V-INFINITY
FSC-S5-12U

DISPLAY CAN BE CONNECTED TO MB1
OR MB2; A, B, C AS LONG AS THE
REMAINING MB TERMINAL IS USED
FOR THE SLAVE COMMUNICATIONS.

WIRE V-INFINITY POWER SUPPLY
TO + AND - TERMINALS.

S7999C CONNECTED TO THE MASTER
CAN CONFIGURE THE MASTER.

MB2

ECOM J3

SOLA
LL MASTER AND SLAVE 1

MB1
2

S7999C
MID-LEVEL DISPLAY
Y

ECOM J3

SOLA SLAVE 2

3
+

–

MB2

ECOM J3

SOLA SLAVE 3

MB1

S7999C CONNECTED TO EACH SLAVE
CAN ONLY CONFIGURE THAT SLAVE AS
WELL AS MONITOR THAT SLAVE’S ACTIVITY.

–

S7999C
MID-LEVEL DISPLAY
Y

MB2

MB1

IT CAN ALSO CONFIGURE THE SLAVE
INFORMATION IN THIS CONTROL AS WELL
AS MONITOR THIS SLAVE’S ACTIVITIES.

V-

LINE VOLTAGE
LOW VOLTAGE
DATA

DO NOT CONNECT THE S7999C TO
TERMINALS 1 2 3. THIS WILL RENDER
THE DISPLAY INOPERABLE.

–

V+

WIRING KEY

S7999C
MID-LEVEL DISPLAY
Y

–

UP TO A MAXIMUM OF 8 SOLA SLAVES
IN A LEAD LAG NETWORK.

MB1
5

MB2

ECOM J3

SOLA SLAVE 4

1
M32007

Fig. 12. S7999C wiring diagram for lead lag.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

STARTING THE S7999C OI
DISPLAY

The “COM” LED exists for I/O traffic.
1.
2.

Power-up Validation
The Home page will appear and the “Power” LED will be on
continuously and the “COM” LED will be blinking when the
device is properly powered and communicating to the Sola
Control.

Make sure the LED is blinking.
If the LED is not blinking:
a. Make sure the proper connections have been made
between the display and the Sola Control.
b. See “Wiring (S7999C OI Display)” on page 10 for
proper wiring of the display connections.

HOME
PAGE

CONFIGURE

OPERATION

CONFIGURATION
GROUPS

LOGOUT

DHW

VERIFY

DIAGNOSTICS

HISTORY

DIAGNOSTIC
TEST

ALERTS

BURNER
CONTROL
DIGITAL I/O

ANNUNCIATION

DISPLAY
SETUP

DETAILS

MODULATION

SETPOINTS

LOCKOUTS

DIAGNOSTIC

ALERTS

ANALYSIS

SILENCE

PUMPS
?

ANALOG I/O

PROGRAM
MODULE

KEY
BUTTON FLOW
BACK ICON FLOW
HOME ICON ALWAYS
TAKES YOU TO THE
HOME PAGE

CLEAN
SCREEN
SYSTEM
CONFIGURATION
ADVANCED
SETUP

M29774

Fig. 13. S7999C display page flow.

PAGE NAVIGATION

Status or Home Page

The Sola OI Displays present information and options in a
paged manner. Pages are displayed in a tree structure in which
the user navigates up and down to arrive at the desired
Function (see Fig. 8 for S7999B or Fig. 13 for S7999C). The
page descriptions are provided below so that you can
understand the purpose of each and view the selections,
parameters, and information that is available or required on
each.

The boiler name associated with the burner control is
displayed in the title on the status page.

A status (summary) page (Fig. 14) is displayed when the
S7999C display is connected. This status page appears on the
S7999B when the Sola control icon is pressed on the “Home”
page. The status page displays the current condition of the
burner control and displays some of the more important
configuration settings.

NOTE: When the burner control has no boiler name defined,
Modbus address is used to identify the boiler.

Common OI Display Page Symbols
Most pages have a Home button

The initial status page displayed contains summary status
information as shown in Fig. 14. Any status information not
applicable for the installation is grayed/blanked out on the
screen.

in the top-left corner of

the screen and a Back button
in the top-right corner of
the screen. The Home button returns the user to the Home
page and terminates any operation in progress. The Back
button returns the user to the previous page.

Buttons on this screen include:
• Configure: used to configure the burner control (see
“Configure Button” on page 13 for more details).
• Operation: used to perform daily or frequent functions with
the burner control, such as setpoint adjustment, etc. See
“Operation Button” on page 18 for details.
• Diagnostic: used to view burner control diagnostic
information (see “Diagnostics Button” on page 19 for more
details).
• Details: used to view burner control detail status
information (see “Details” on page 38).

Two other icons may be noticed near the boiler name.
A bell
will be displayed if the system is in Lockout that
reset will be required.
A padlock
will be shown on screens that require a password
to change the parameter. An unlocked padlock indicates the
password has been entered to change the parameter.
65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

• History: used to view burner control history (see “History
Button” on page 16 for more details).
• ?: used to expand the pump status information.
• Modulation: used to toggle between status displays: pump,
setpoints, and modulation.

Fig. 15. Configuration menu page. Shown is the S7999C on
a Hydronic Control.
No specific order for configuration is required. All parameters
are enabled for editing, though some may not be applicable
(e.g., a configuration parameter may disable a control feature).
Selecting a parameter group from the menu displays
parameters exclusively applicable for the functional group on
the page (see Fig. 16). These parameters can be edited, and
when the user is finished, control returns back to the
configuration menu page.

Fig. 14. Summary status page (Hydronic Control shown).

Configure Button
Pressing the Configure button (bottom left) on the Status page
opens the Configuration page. The Configuration page shown
in Fig. 15 is for the S7999C OI display.
The S7999B Configuration page does not have a “Display
Setup” button.
Display Setup (S7999C only): Pressing the Display Setup
button displays miscellaneous S7999C OI Display setup and
diagnostic functions (See page 47 for options). (The same
function as the 1234 Setup on the S7999B home page.)
The configuration page allows the user to view and set
parameters that define how the connected R7910A functions in
the hydronic heating system or the R7911 steam heating
system.
The configuration page contains a menu of parameters
grouped into functional areas that the user selects for
configuration (see Fig. 16). See Table 61 on page 53 for all
parameters available for configuration. If some parameters are
not visible, they have been made invisible by Honeywell.

Fig. 16. Sample configuration page for the S7999B
Hydronic Control.
Each parameter is displayed in its group. If there are more
parameters than will fit on the screen, a vertical scroll bar
allows the user to scroll up and down to view all parameters.
The parameter name is displayed on the left and the current
setting is displayed in the text box on the right.

Configuration Password
Some parameters require a valid configuration password be
entered by the user before the parameter can be changed. The
password need only be entered once while the user remains
on the configuration pages. Leaving the configuration pages
ends the scope of the password.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

The user is not required to enter a configuration password for a
parameter that has a lower access level than the access level
achieved by an earlier password entry for any configuration
group (as long as the user stays in the configuration pages).
The user only needs to enter a password once until a
parameter that has a higher access level is selected.

Three levels of access to Sola Control parameters are
permitted. Each access level has defined rights when
interfacing with configuration and status parameters within the
controls.
• End user: The end user can read or view the control
parameters and be allowed to change some operating
parameters, CH setpoint as an example.
• Installer: The installer can read all control parameters and
change Honeywell's allowed parameters. This access level
is used to customize the control for a particular installation.
• OEM: The OEM can read and change all parameters,
change sensor limits and burner control safety parameters.

Keyboard
Some pages request user entry of characters. When this type
of input is required, a keyboard page appears, as shown in Fig.
18. The text box at the top of the screen displays the current
(or default) setting of the user input. The user can add to this
text, clear it, or change it.

Different passwords exist in the Sola Control for each access
level. The end user level requires no password, but the
installer and OEM levels have unique passwords defined for
them.

The Shift key on the left side of the screen shifts between
upper and lowercase characters. Pressing the Shift key
toggles the keyboard from one mode to the other (continuous
pressing of the Shift button is not required). The OK button
should be pressed when the user is done entering the text
input. The Cancel button on the bottom of the screen allows
the user to ignore any text changes that have been made and
keep the original text value. Pressing the OK or Cancel buttons
returns the user to the page displayed prior to the keyboard
page.

The installer and OEM passwords can be changed in the Sola
Control after logging in with the current password. When the
password is changed, it is saved for all future logins.
NOTE: For the S7999B System OI display, each boiler in a
multi-boiler configuration has its own set of installer
and OEM passwords. To avoid user confusion, the
passwords should be changed to the same password
in each control, but there is no requirement to do so.
Make sure to record your password.

Login
Pressing the Login button allows entering the password from a
keyboard as shown in Fig. 18. After the password is entered,
the OK button is selected. The Cancel button aborts the
password login.

The user is notified that a new password is needed to change a
parameter (or until a password is entered successfully)—see
Fig. 17. The user can continue viewing the configuration
parameters regardless of whether a password is entered
successfully.

Fig. 18. Device login screen.

WARNING

Fig. 17. Login required. (S7999B Hydronic Control Shown.)

Explosion Hazard.
Improper configuration can cause fuel buildup and
explosion.
Improper user operation may result in PROPERTY
LOSS, PHYSICAL INJURY or DEATH.

The Sola Controls maintain a password time-out that limits the
scope of the password entry. Once a password is successfully
entered, the control starts an internal timer that expires after 10
minutes of inactivity. After the timer expires, the user is
required to re-enter a password before a parameter can be
changed.

65-0303—05

Using the OI Displays to change parameters must be
attempted by only experienced and/or licensed
burner/boiler operators and mechanics.

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Change Parameter Settings

Like operating parameters, safety parameters can be viewed
without the need to enter a password.

Change parameter settings by selecting the parameter on the
page. A dialog box displays for the parameter with controls
allowing the user to change the value (see Fig. 19). After
changing the setting to a new value, press the OK button.
Pressing the Cancel button leaves the parameter unchanged.

Safety parameter blocks that have been changed require
verification. The verification steps do not have to be completed
immediately; the installer can move between and change
parameter groups before the verification is done. A Verify
button is enabled that allows the installer to conduct verification
sessions (the example of the Verify button in Fig. 15 is not yet
enabled because the installer hasn’t logged in).

The changed setting is reflected on the screen and sent to the
control when the OK button is pressed.

NOTE: When the installer proceeds with the safety parameter
configuration, the control unlocks the safety parameters in this group and marks them unusable. Failure to
complete the entire safety configuration procedure
leaves the control in an un-runnable state (lockout 2).
All safety configuration parameters in the group should have
the same access level. If this condition isn’t so, the user is
asked to enter another password when a higher access level is
needed.
Successful login is noted by the lock icon, which changes to
“unlocked” on the page. The installer may begin to change
safety parameters (or any other parameters) at that time. (See
Fig. 21.) If the Sola Control is in an unconfigured (or new)
state, then this warning doesn’t appear. All parameters that
need changes should be changed during the login.

Fig. 19. Change configuration parameter page example of
a Hydronic Control.

Verify
Pressing the Verify button displays safety configuration
parameters for an additional verification step to commit the
changes.
Safety parameters are grouped into blocks that include only
safety parameters, not a mixture of safety data and non-safety
data. All parameters within the safety group undergo a
verification process. A safety parameter group is identified on
the display to indicate when the configuration parameters are
safety-related. Each safety parameter group is verified one at a
time until all have been verified. See Fig. 20.

Fig. 21. Edit safety data.
If the safety configuration session is terminated after it has
started (in the Edit or Verify stages), the Sola Control is left in
an unconfigured (unrunnable) state.
The installer can terminate the session by pressing the Menu
button or by attempting to leave the Verification page with the
Home or Back buttons (top-left and -right screen corners,
respectively). However, leaving the session at this point leaves
the control in an unrunnable state and confirms whether the
installer still wants to do so.
The settings of all parameters in each safety block must be
verified to save them in the control.
When the installer is done changing safety parameters,
pressing the Verify button on the configuration screen begins
the Verification process. The settings for all safety parameters
in each changed block are presented and Verified by the
installer (see Fig. 22).

Fig. 20. Safety verification.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Safety lockouts are indicated on each configuration page as an
alarm bell symbol. At the home (for S7999C) or status page
(for S7999B), the History button turns red. If the S7999B is
displaying the system status icons, the control in alarm will turn
red.
The lockout history can be displayed by pressing on the
History button. The state information about each lockout is
displayed along with the date/time that the lockout occurred
(see Table 3). Current date/time stamp is a display setup
feature.
NOTE: In the event of a power interruption, the date/time
must be reset. The OI Display does NOT have a
backup means.
Table 3. Sola Control Lockout History.
Data
Fig. 22. Safety parameter confirmation.
Press the Yes button to confirm each safety parameter block. If
the No button is selected, the safety parameter block remains
unconfirmed and the Configuration menu page is displayed.
The control remains in an unconfigured state in this case.
After all safety parameter blocks have been confirmed, the
installer is asked to press and hold the Reset button on the
Sola Control to complete the safety verification session (see
Fig. 23).

Comment

Lockout time

Set by display

Fault code

Unique code defining which
lockout occurred.

Annunciator first out

First interlock in limit string
results in a shutdown.

Description

Fault description

Burner Lockout/Hold

Source/reason for lockout/
hold

Burner control state
Sequence time

Burner control state timer at
time of fault

Cycle

Burner control cycle

Run Hours

Burner control hours

I/O

All digital I/O status at time of
fault

Annunciator 1-8 states

All annunciator I/O status at
time of fault

Fault data

Fault dependent data

An alert log can be displayed for each control by pressing the
Alert button on the bottom of the history status page. A
description of the alert is displayed along with the time when
the alert occurred (see Table 4).
Table 4. Sola Control Alert Log.
Data

Fig. 23. Safety parameter reset.

Comment

Alert time

Set by display

When the Reset button is pressed and held for 3 seconds the
confirmed safety parameters are saved in the control. The
above Reset dialog box automatically closes when this step is
completed.

Alert code

Unique code defining which
fault occurred.

Description

Alert description

If this step is not performed, the control remains in a safety
lockout state until the installer resolves the unverified safety
parameters.

History Button
The History button on the Home page serves not only as a
button, but also displays Sola Control lockouts, holds, and
alerts as they occur. The History button can be selected at any
time, regardless of which type of information is displayed, to
view history information. Pressing the History button displays a
dialog box (see Fig. 24) that allows the user to select the type

Fault/Alarm Handling
Each Sola Control reports to the OI display when a safety
lockout or an Alert occurs.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

of history to view. The user can also silence an audible alarm
generated by the control during a lockout or alert by alarm
condition.

The date and time that each fault occurred is displayed in the
lockout history. The lockout timestamp displays in both the
lockout summary and detail information.

This History dialog box provides an exploded view of the status
information displayed in the History button (the font is larger).
One of the four buttons (OK, Lockouts, Alerts, or Silence) can
be selected. If none of these buttons are selected the dialog
box closes after 30 seconds.

The Sola Control does not maintain date or time of day
information. The date and time stamp is assigned by the OI
display. When the OI display first obtains the lockout and alert
history from the control (during the display data
synchronization), no timestamps are assigned since the times
that the lockouts occurred are unknown. All new lockouts that
occur after the synchronization are assigned timestamps.
NOTE: The system time can be set in the OI display to
ensure that correct timestamps are given to the controls’ lockouts and alerts. Power interruptions will
require the time to be reset as the display DOES NOT
have a time backup means.
The Clear Lockout button allows the user to acknowledge and
clear (reset) the lockout when in lockout state, much the same
as pressing the reset button on the front of the Sola Control.
The user can toggle between displaying the controls’ lockout
history and alert log by pressing the Alerts or Lockouts button
on the bottom of the pages.

Fig. 24. Hydronic history example shown—exploded view.
Two types of historical data can be displayed on the history
page: lockout history and alert log.
The entire 15 fault code history is displayed in a scrollable list
with the most recent fault displayed first followed by the next
most recent fault. Summary information is displayed for each
fault entry, including the burner cycle count, fault code, and
fault number with description. Detailed information for a
specific fault entry that also includes burner control sequence
state, burner run-time hours, annunciation status, etc., is
viewed by selecting (touching the History line) the lockout entry
in the list (see “Fault/Alarm Handling” on page 16 for details).
Fig. 26. Alert log example shown.
To see additional detail about a lockout or alert, touching on the
lockout or alert in the list expands the view of that lockout or
alert, as shown in Fig. 27 and 28.

Fig. 25. Lockout history example shown.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Fig. 27. Control expanded lockout detail.

Fig. 29. Hydronic operation page shown.

Fig. 28. Control expanded alert detail.

Fig. 30. Programmable annunciation.

Operation Button
The operation button displays the SOLA Control running
operation, including setpoint and firing rate values. From this
page the user can change setpoints, manually control the
boiler’s firing rate, manually turn pumps on, view annunciation
information, and switch between hydronic heating loops
(Central Heat and Domestic Hot Water), as shown in Fig. 22. If
a password is required to change any of the settings on this
page, the user can press the Login button to enter the
password.
Annunciation information is shown in Fig. 23 and Fig 24.

Fig. 31. Fixed annunciation.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Diagnostics Button

System Configuration
(S7999B OI DisplayOnly)

The Diagnostics button displays analog and digital I/O status of
the SOLA Control. A snapshot of the diagnostic status is
displayed and updated once per second as it changes in the
control. See “R7910A or R7911 Diagnostics” on page 44 for
more information about this status.

The OI Display has some functions related to general
configuration for the control in the end user installation.
Pressing the Display Refresh button invokes a search
procedure (see Fig. 34). A new R7910A Hydronic Control or
R7911 Steam Control is identified by “Unknown” status next to
its name in the boiler system list (see Fig. 35). “Unknown”
indicates that configuration data has not been retrieved from
the control yet.

The digital I/O data is displayed as LEDs that are either on
(green) or off (red) (See Fig. 23). Not all digital I/O can be
displayed at the same time on the page, so a horizontal scroll
bar is used to move the view left and right to show all digital
I/O data.

Fig. 34. System refresh.
Fig. 32. Diagnostic page (digital I/O).
The control analog I/O can also be viewed on the OI Display. A
snapshot of the diagnostic status is displayed and updated as
it changes in the control.
The analog I/O data is displayed as bar charts with I/O level
represented in the I/O range (see Figure 24.) Analog I/O that is
not enabled for the installation displays a blank I/O level. Not
all analog I/O can be displayed at the same time on the page,
so a horizontal scroll bar is used to move the view left and right
to show all analog I/O status.

Fig. 35. System configuration page.
The control connected to the Modbus network is indicated to
the user after the search procedure has concluded.
Once the control is located it must be synchronized with the OI
Display before it can be displayed. New controls are not
displayed on the Home page until this synchronization (see
below) is performed.

System Synchronization
(S7999B OI Display Only)

Fig. 33. Diagnostics page (analog I/O).

The user can manually synchronize configuration data from the
connected controls at any time.
19

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 5. Functional Configuration Groups.

A new control is visible when configuration and status data is
gathered from it. This collection procedure takes a few
minutes. The control is marked as “Unknown” when no
configuration information exists. Normally, control configuration
data collection only needs to be performed when the control is
initially installed. However, a re synchronization is necessary
after the OI Display is reset. See Fig. 36.

T-Rise Limit
Anti-condensation

Burner Control Flame Failure

The user presses the Synchronize button to begin
synchronization with the control. See Fig. 36.

Frost Protection
Configuration

System Configuration

Annunciation Configuration

Fan Configuration

Burner Control Interlocks

Lead Lag Configuration

Hydronic Control

Steam Control

Heat Exchanger High Limit

Burner Control Timings and
Rates
Burner Control Ignition
Burner Control Flame Failure
System Configuration
Fan Configuration
Sensor Configuration
Lead Lag Slave
Configuration
Lead Lag Master
Configuration
Most of this configuration is performed by either the contractor/
installer or at Honeywell. Each functional group is displayed on
the Configuration menu page.
Fig. 36. System synchronization.

Parameters in functional groups that are not applicable for the
installation can be ignored. In some cases, features in a
functional group are disabled by default and are enabled when
needed for the installation.

Status of the synchronization is reflected in the dialog box. The
synchronization can be aborted by selecting the Cancel button.

Configuration

R7910A HYDRONIC CONTROL,
R7911 STEAM CONTROL
CONFIGURATION
PARAMETERS

The SOLA Control can be configured from the OI Display. The
control configuration is grouped into the functional groups seen
in Table 5.
Table 5. Functional Configuration Groups.
Hydronic Control

Steam Control

System Identification and
Access

Steam Identification and
Access

CH - Central Heat

Steam Configuration

Outdoor Reset

Modulation Configuration

DHW - Domestic Hot Water

Pump Configuration

The following pages list the configuration parameters available
for the R7910A or R7911 installed.
NOTE: Individual Configuration pages may differ from this
text as features are added or amended by Honeywell.
A password is required to make changes to the Configuration
Parameters. The SOLA Control will be in a Lockout 2 “waiting
for safety data verification” as received or will go to a Lockout 2
when changes are made to the safety data.

DHW Storage
DHW Plate
Warm Weather Shutdown

WARNING

Demand Priority
Modulation Configuration

Statistics Configuration

Pump Configuration

Stack Limit

Statistics Configuration

Annunciation Configuration

High Limit

Burner Control Interlocks

Stack Limit

Burner control Timings and
Rates

Explosion Hazard.
Improper configuration can cause fuel buildup and
explosion.
Improper user operation may result in PROPERTY
LOSS, PHYSICAL INJURY or DEATH.
The OI Display used to change parameters, must be
attempted by only experienced and/or licensed
burner/boiler operators and mechanics.

Delta T Limits

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Central Heat Parameters
(R7910A Hydronic Control Only)
Table 8 displays Central Heat Hydronic Control configuration
parameters.

Fig. 37. System identification and access configuration.
(Hydronic Screen Shown.)
Table 6 displays System Identification and Access parameters.
Fig. 38. Central Heat hydronic configuration.

Table 6. System Identification and Access Parameters.
Parameter

Comment

Boiler Name

Name to identify boiler (up to 20
characters)

Installation

Notes regarding installation (up to 20
characters)

Table 8. Central Heat Hydronic
Configuration Parameters.
Parameter

Comment

CH enable

Disable or Enable Central Heating
Loop

Demand switch

Sensor for Central Heat demand:
Sensor only
Sensor & STAT terminal
Sensor & Remote Stat
LCI & Sensor

Outdoor reset

Default parameter settings for installer and Honeywell
passwords are “sola” and “solaoem,” respectively. These
passwords most likely have been changed by Honeywell.

Enabled
Disabled

CH has priority over
Lead Lag

Yes, No, Cancel

Factory Data gives Honeywell an option to display a brand
name other than Sola on this configuration page. Additional
information displayed on this page is listed in Table 7.

Setpoint source

Local
S2 (J8-6) 4-20mA

Setpoint

Setpoint for normal Central Heat
modulation:
-40 °F to 266 °F (-40 °C to 130 °C)

Table 7. System Identification Information.

Time of day setpoint

Setpoint when Time Of Day switch is
on. -40 °F to 266 °F (-40 °C to 130 °C)

Status

Off hysteresis

Differential above setpoint when boiler
is turned off.
32 °F to 266 °F (0 °C to 130 °C)

On hysteresis

Differential from setpoint when boiler
is turned on. 32 °F to 266 °F (0 °C to
130 °C)

4 mA water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

20 mA water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Modulation sensor

Outlet sensor, Inlet sensor, S5 (J8-11)

Installer password

Change installer password setting

OEM password

Change OEM password setting

Factory Data

OEM name to associate with boiler
(up to 20 characters)

When the burner name is changed, the name is saved in the
R7910A or R7911 and displayed in the title of all pages that
zoom into the control.

Product Type

Comment
Type of product that the burner is

OS Number

Model number associated with burner

Software Version

Version of software running in the
R7910A or R7911

Date Code

Date when R7910A or R7911 was
assembled

Application Revision

Version of application data in the
R7910A or R7911

Safety Revision

Revision of safety data in the R7910A
or R7911

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 8. Central Heat Hydronic
Configuration Parameters. (Continued)
Parameter

Table 9. Steam Configuration Parameters
Parameter

Comment

Modulation Rate
Sensor

Local

Steam pressure on
hysteresis

P-gain

Gain applied for the P portion of the
PID equation
0-400

Differential from setpoint when boiler
is turned on.
Adjustable 0 to 15 or 0 to 150 (sensor
dependant)

Steam hysteresis
step time

Time between hysteresis changes 0 to
600 seconds (0=disable)

I-gain

Gain applied for the I portion of the
PID equation
0-400

Steam P Gain

Gain applied for the P portion of the
PID equation
0-400

D-gain

Gain applied for the D portion of the
PID equation
0-400

Steam I Gain

Gain applied for the I portion of the PID
Equation - 0-400

Hysteresis step time

Time between hysteresis step
changes: 0-600 seconds (0=Disable
hysteresis stepping)

Steam D Gain

Gain applied for the D portion of the
PID equation
0-400

Steam 4-20 ma
remote control

uses 4-20ma remote control function to
control either the setpoint or
modulation for Steam
Disable, setpoint, modulation

Outdoor Reset Parameters
(R7910A Hydronic Control Only)
Table 10 displays Outdoor Reset configuration parameters.
Pressing the left or right arrow displays Lead Lag, which lists
the same parameters.

Fig. 39. R7911 Steam Configuration.

Table 9. Steam Configuration Parameters
Parameter

Comment

Steam enable

Disable/enable steam feature

Steam demand
source

Sensor and LCI
Sensor and Remote Stat
Sensor and Stat Terminal
Sensor Only

Steam pressure
setpoint

Setpoint for normal modulation
Adjustable 0 to 15 or 0 to 150 (sensor
dependant)

Steam time of day
setpoint

Setpoint when TOD switch on
Adjustable 0 to 15 or 0 to 150 (sensor
dependant)

Minimum steam
pressure

Establishes setpoint for the 4ma. input.
Adjustable 0 to 15 or 0 to 150 (sensor
dependant)

Steam pressure off
hysteresis

Differential below setpoint when boiler
is turned off
Adjustable 0 to 15 or 0 to 150 (sensor
dependant)

65-0303—05

Fig. 40. Outdoor reset configuration.

Table 10. Outdoor Reset Configuration Parameters.
Parameter

Comment

Maximum outdoor
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Minimum outdoor
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Low water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Minimum water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Maximum off point

-40 °F to 266 °F (-40 °C to 130 °C)

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Domestic Hot Water (DHW)
Configuration Parameters
(R7910A Hydronic Control Only)

Table 11. Domestic Hot Water (DHW)
Configuration Parameters. (Continued)

Table 11 displays Domestic Hot Water (DHW) configuration
parameters.

Parameter

Comment

Hysteresis step
time

___hour ___min ___sec

DHW priority vs CH Which system has priority:
Central Heat over Domestic Hot
Water, or
Domestic Hot Water over Central Heat
DHW priority vs
Lead Lag

Which system has priority:
Lead Lag over Domestic Hot Water,
Domestic Hot Water over Lead Lag

DHW P-gain

Gain applied for the P portion of the
PID equation
0-400

DHW I-gain

Gain applied for the I portion of the
PID equation
0-400

DHW D-gain

Gain applied for the D portion of the
PID equation
0-400

DHW Storage Configuration
Table 12 displays DHW Storage configuration parameters.

Fig. 41. Domestic Hot Water (DHW) configuration.

Table 12. DHW Storage Configuration Parameters.

Table 11. Domestic Hot Water (DHW)
Configuration Parameters.
Parameter

Parameter

Comment

DHW storage
enable

Enabled, Disabled

Storage time

___hour ___min ___sec

Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Enable

Disable or Enable Domestic Hot
Water Loop

Demand switch

Sensor for Central Heat demand:
DHW sensor only,
DHW sensor & Remote Stat,
DHW switch & inlet sensor, or
DHW switch & outlet sensor

Priority source

Which system has priority:
Disabled or
Heat Demand

DHW Plate Heat Exchanger
Configuration

Priority method

Boost during priority time
Drop after priority time

Table 13 displays DHW Plate Heat Exchanger configuration
parameters.

Modulation sensor

DHW Sensor
Outlet Sensor
Inlet Sensor
Auto: DHW (S6) or Inlet Sensor
Auto: DHW (S6) or Outlet Sensor

Setpoint

Off hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

On hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

Table 13. DHW Plate Heat Exchanger
Configuration Parameters.
Parameter

-40 °F to 240 °F (-40 °C to 115 °C)

Comment

Tap detect degrees -0 °F to 180 °F (-17 °C to 82 °C)

Time of day setpoint Setpoint when Time Of Day switch is
on. -40 °F to 240 °F (-40 °C to 115 °C)

Tap detect on
recognition time

___hour ___min ___sec

Off hysteresis

Differential above setpoint when boiler
is turned off. -40 °F to 240 °F (-40 °C
to 115 °C)

Tap detect on
threshold

-0 °F to 180 °F (-17 °C to 82 °C)

On hysteresis

Differential from setpoint when boiler
is turned on.
2 °F to 234 °F (-16 °C to 112 °C)

DHW priority
override time

Tap detect minimum ___hour ___min ___sec
on time
Tap stop inlet-DHW -0 °F to 180 °F (-17 °C to 82 °C)
degrees

___hour ___min ___sec

Tap stop outlet-Inlet -0 °F to 180 °F (-17 °C to 82 °C)
degrees

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 13. DHW Plate Heat Exchanger
Configuration Parameters. (Continued)
Parameter

Table 14. Warm Weather Setpoint
Configuration Parameters.

Comment

Parameter

Comment

Plate preheat
setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Enable

Enabled, disabled

Plate preheat on
recognition time

___hour ___min ___sec

Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Plate preheat on
hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

Plate preheat off
hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

Demand Priority Configuration
Parameters
Fig. 42 displays R7910A Hydronic Control Demand Priority
configuration options. Press the arrows to change the priority
order.

Plate preheat detect -0 °F to 180 °F (-17 °C to 82 °C)
on threshold
Plate preheat detect -0 °F to 180 °F (-17 °C to 82 °C)
off threshold
Plate preheat
minimum on time

___hour ___min ___sec

Plate preheat delay ___hour ___min ___sec
after tap

Warm Weather Shutdown
Configuration
Table 14 displays Warm Weather Setpoint configuration
parameters.

Fig. 42. Demand priority configuration.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Modulation Configuration
Parameters

Steam Modulation Configuration
Parameters

Table 15 displays R7910A Hydronic Control Modulation
configuration parameters.

Table 16 displays R7911 Steam Modulation Configuration
parameters.

Fig. 43. Modulation configuration.

Fig. 44. Steam modulation configuration.

Table 15. R7910A Hydronic Control Modulation Configuration Parameters.

Table 16. R7911 Steam Modulation Configuration
Parameters.

Parameter

Comment

CH maximum
modulation rate

RPM or %

CH maximum
modulation rate

RPM or %

DHW maximum
modulation rate

RPM or %

Minimum modulation RPM or %
rate

CH forced rate time

0-600 seconds

CH forced rate time

0-600 seconds

CH forced rate

RPM or %

CH forced rate

RPM or %

0-10/4-20 mA Output
hysteresis

DHW forced rate time 0-600 seconds
DHW forced rate

RPM or %

CH slow start enable Enabled
Disabled
DHW slow start
enable

Enabled
Disabled

Slow start degrees

-40 °F to 266 °F (-40 °C to 130 °C)

Slow start ramp

RPM /minute or %/minute

0-10/4-20 mA Output
hysteresis

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Pump Configuration Parameters

NOTE: The R7911 Steam Control does not have pumps, but
the outputs are available to operate air dampers or
accessories. CH Pump, Boiler Pump and System
Pump are used for these output options.

Table 17 displays Pump configuration parameters. Use the left
and right arrows to switch between Central Heat, Boiler, DHW,
System, Auxiliary 1, and Auxiliary 2 pumps. The parameters
are the same for all pumps.

Table 17a. Pump Configuration Parameters for R7911
Steam Modulation Configuration Parameters.

Pressing the Advanced Settings button brings up a number of
other advanced configuration options for each pump. Press the
Control Settings button to return to the screen shown in Fig.
45.

Parameter

Fig. 45. Pump configuration.

Auxiliary pump control

Auto
On

Auxiliary pump is on when

CH pump is ON
Slave command

Auxiliary pump output

Pump A
Pump B
Pump C
None

Boiler pump control

Auto
On

Boiler pump output

Pump A
Pump B
Pump C
None

Boiler pump overrun time

0-600 seconds
0 = Not configured

CH pump control

Auto
On

CH pump output

Pump A
Pump B
Pump C
None

CH pump overrun time

0-600 seconds
0 = Not configured

System pump control

Auto
On

System pump output

Pump A
Pump B
Pump C
None

System pump ourrun time

0-600 seconds
0 = Not configured

Pump exercise time

0-600 seconds
0= Not configured

Table 17. Pump Configuration Parameters for
R7910A Hydronic System.
Parameter
Pump control
Pump output

Pump start delay
Overrun time

Comment
Auto
On
Pump A
Pump B
Pump C
None
___hour ___min ___sec
___hour ___min ___sec

*Table 61 on page 53 has more parameters listed.

65-0303—05

Comment

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Statistics Configuration Parameters

High Limit Configuration Parameters
(R7910A Hydronic Control Only)

Table 15 displays Statistics configuration parameters.

Table 19 displays outlet high limit configuration parameters.

Fig. 46. Statistics configuration.
Fig. 47. High Limits configuration.

Table 18. Statistics Configuration Parameters.
Parameter

Comment

Table 19. High Limit Configuration Parameters.

Auxiliary pump cycles 0-999,999
Boiler pump cycles

Parameter

0-999,999

Burner cycles

0-999,999

Burner run time

0-999,999

CH pump cycles

0-999,999

DHW pump cycles

0-999,999

System pump cycles 0-999,999
Auxiliary 2 pump
cycles

0-999,999

Comment

DHW high limit

Enabled
Disabled

DHW high limit
response

Recycle & hold
Lockout

DWH high limit
setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Outlet high limit

Enabled
Disabled

Outlet high limit
response

Recycle & hold
Lockout

Outlet high limit
setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Stack Limit Configuration Parameters

Delta T Limit Configuration
Parameters
(R7910A Hydronic Control Only)

Table 20 displays stack limit configuration parameters.

Table 21 displays other limit parameters. Use the left and right
arrows to switch between Inlet to Outlet Flow and Exchanger to
Outlet Flow. The parameters are the same for all pumps.

Fig. 48. Stack Limit configuration.

Table 20. Stack Limit Configuration Parameters.
Parameter
Stack limit

Comment

Stack limit delay

___hour ___min ___sec

Stack limit response

Lockout
Recycle & delay

Stack limit setpoint

32 °F to 266 °F (0 °C to 130 °C)

65-0303—05

Fig. 49. Delta T Limit configuration.

Enabled dual sensor safety
Enabled single sensor non safety
Disabled

Table 21. Delta T Limit
Configuration Parameters.
Parameter
Delta T enable

Comment
Enabled
Disabled

Delta T degrees

0 °F to 234 °F (-17 °C to 112 °C)

Delta T delay

___hour ___min ___sec

Delta T response

Recycle & delay
Recycle & Delay with retry limit
Lockout

Delta T retry limit

0–100

Delta T rate limit
enable

Enabled
Disabled

Delta T inverse limit
time

___hour ___min ___sec

Delta T inverse limit
response

Recycle & delay
Recycle & delay with retry limit
Lockout

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

T-Rise Limit Configuration
Parameters

Anti-Condensation Configuration
Parameters (R7910A Hydronic
Control Only)

Table 22 displays T-Rise limit parameters.

Table 24 displays anti-condensation parameters. Use the left
and right arrows to switch between Central Heat, Domestic Hot
Water, Frost Protection, and Priority parameters.

Table 22. T-Rise Limit Configuration Parameters.
Parameter

Comment

Outlet T-rise enable

Enabled
Disabled

Heat exchanger Trise enable

Enabled
Disabled

T-rise degrees

0 °F to 234 °F (-17 °C to 112 °C)/sec

T-rise response

Recycle & delay
Recycle & delay with retry limit
Lockout

T-rise retry limit

0 to 100

T-rise delay

___hour ___min ___sec

Heat Exchanger High Limit
Configuration Parameters
Table 23 displays T-Rise limit parameters.
Fig. 50. Anti-condensation configuration.

Table 23. Heat Exchanger High Limit
Configuration Parameters.
Parameter

Table 24. Anti-Condensation Configuration Parameters.

Comment

Heat exchanger high Enabled
limit enable
Disabled

Parameter

Heat exchanger high -40 °F to 266 °F (-40 °C to 130 °C)
limit setpoint
Heat exchanger high Recycle & delay
limit response
Recycle & delay with retry limit
Lockout
Heat exchanger retry 0 to 100
limit
Heat exchanger high ___hour ___min ___sec
limit delay

Comment

CH Enable

Enabled
Disabled

CH Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

DHW Enable

Enabled
Disabled

DHW Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Frost Protection
Enable

Enabled
Disabled

Anticondensation
Priority

Anticondensation is more important
than (check those that apply):
Stack limit
Delta T limit
Slow start
Forced rate
Outlet high limit

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Frost Protection Parameters
(R7910A Hydronic Control Only)

Annunciation Configuration
Parameters

Table 25 displays frost protection parameters.

Table 26 displays annunciation configuration parameters.

Fig. 51. Frost Protection configuration.

Fig. 52. Annunciation configuration example.

Table 25. Frost Protection Configuration Parameters.

Table 26. Annunciation Configuration Parameters.

Parameter
CH frost protection
enable

Parameter

Comment

DHW frost protection Enabled
enable
Disabled
Lead Lag frost
protection enable

Enabled
Disabled

Outdoor frost
protection setpoint

-40 °F to 266 °F (-40 °C to 130 °C)
(applicable for CH only)

Lead Lag frost
protection rate

___%

CH pump frost
overrun time

___hour ___min ___sec

DHW pump frost
overrun time

___hour ___min ___sec

Comment

Annunciation enable Enabled
Disabled

Enabled
Disabled

Annunciator (1–8)
location

01 - Annunciator 1
02 - Annunciator 2
03 - Annunciator 3
04 - Annunciator 4
05 - Annunciator 5
06 - Annunciator 6
07 - Annunciator 7
08 - Annunciator 8
PII - Pre-Ignition ILK
LCI - Load Control Input
ILK - Interlock

Annunciator (1–8)
short name

Up to 3 characters

Annunciator (1–8)
name

Up to 20 characters

Safety Configuration Parameters
Table 27 through 30 display safety parameters.
NOTE: Login is required to change Safety Parameters and
the SOLA Control will go to a Lockout 2 “waiting for
safety data verification” when a change is made.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Fig. 53. Burner Control Interlocks control.

Fig. 54. Burner Control Timings and Rates configuration.

Table 27. Burner Control
Interlocks Configuration.

Table 28. Burner Control Timings and Rates Configuration.

Parameter

Comment

PII enable

Enabled
Disabled

Prepurge rate

RPM or %

LCI enable

Enabled
Disabled

Prepurge time

___hour ___min ___sec

Run stabilization time ___hour ___min ___sec

Interrupted air switch Enable during purge and ignition
(IAS) enable
Disabled
Enable during purge
Interlock (ILK) start
check enable

No ILK check
ILK check

ILK/IAS open
response

Recycle
Lockout

Standby Rate

RPM or %

Postpurge rate

RPM or %

Postpurge time

___hour ___min ___sec

Forced recycle
interval time

___day ___hour ___min

ILK bounce detection Enabled
enable
Disabled
Purge rate proving

Fan Speed
High Fire Switch
None

Lightoff rate proving

Fan Speed
Low Fire Switch
None

Fig. 55. Burner Control Ignition configuration.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 30. Burner Control Flame
Failure Configuration. (Continued)

Table 29. Burner Control Ignition Configuration.
Parameter

Comment

Ignite failure retries

1, 3, or 5
Recycle
Lockout

Pilot test hold

On
Off

MFEP flame failure
response

Ignition source

Hot Surface Igniter
External ignition
Internal ignition

Run flame failure
response

Recycle
Lockout

Fan speed error
response

Recycle
Lockout

Pilot type

Direct burner constant ignition
Direct burner pulsed ignition
Intermittent
Interrupted

Lightoff rate

RPM or %

Preignition time

___hour ___min ___sec

Pilot Flame
Establishing Period

15 secs
10 secs
4 secs

Igniter on during

1st half of PFEP
Pilot Flame Establishing Period

Main Flame
Establishing Period

15 secs
10 secs
5 secs

Flame Threshold

μA/V

Safety Parameter Verification
When any of the safety configuration parameters are changed,
the safety parameter verification procedure must be performed
before the control will resume burner control. The control
enters a lockout state, if not already in one, and remains locked
out until this verification procedure is performed.
Safety parameter verification lockout occurs when safety
parameter setting is changed. See Fig. 57.

Fig. 57. Safety verification lockout.
The user must log in before verification can be completed, as
shown in Fig. 58.
Fig. 56. Burner Control Flame Failure configuration.

Table 30. Burner Control Flame
Failure Configuration.
Parameter

Comment

Ignite failure
response

Lockout
Recycle
Recycle & hold
Recycle & lockout

Ignite failure delay

___hour ___min ___sec

Fig. 58. Safety verification login.
65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

After the first safety parameter group has been confirmed by
the user (by pressing the Yes button), the next safety
parameter group waits for verification as shown in Fig. 61.

After successful login, the user presses the Begin button to
start safety parameter verification. See Fig. 59.

Fig. 59. Begin safety verification.

Fig. 61. Safety parameter settings confirmed; next group
waiting for confirmation.

The first group of safety configuration parameters that needs
verification is displayed. The user is asked to confirm that the
settings are correct, as shown in Fig. 60.

The user has 30 secs to confirm each safety configuration
group’s settings. If the user takes too long to confirm the
settings, an error message is displayed, as shown in Fig. 62.

Fig. 60. Confirm safety parameter settings.
Fig. 62. Confirmation timed out.
After all safety parameter groups have been verified, the user
must press the Reset button on the control within 30 seconds
to confirm the correct device. See Fig. 63.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

If for some reason the user does not press the Reset button on
the control within 30 seconds, the configuration is cancelled,
as shown in Fig. 65.

Fig. 63. Reset R7910A or R7911.
When the user has pressed the Reset button on the control,
completing verification procedure, a Verification Complete
screen is displayed, as shown in as shown in Fig. 64.

Fig. 65. Control reset timed out.

Fig. 64. Safety parameter configuration complete.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Individual R7910A or R7911
Configuration Parameters

Table 32. R7911 System
Configuration Parameters. (Continued)
Parameter

Table 31 and Table 32 displays system configuration
parameters for individual controls.

Comment

Anti short cycle time

___hour ___min ___sec

Alarm silence time

___day ___hour ___min

Power up with lockout

Clear lockout
Do NOT clear lockout

Inlet connector type

0-15 psi
0-150 psi
UNCONFIGURED

Stack connector type

10k NTC dual safety
10k NTC single non-safety
12k NTC single non-safety
UNCONFIGURED

Header

4-20ma
UNCONFIGURED

Fan Parameters
Table 33 displays fan parameters.

Fig. 66. System configuration (R7911 shown).
Table 31. R7910AHydronic
System Configuration Parameters.
Parameter

Comment

Flame sensor type

Flame rod
UV power tube
UV power tube with spark interference
None

Modulation output

4-20mA
0-10V
Fan PWM

Blower/HSI

Blower
Hot surface ignition

Temperature units

Fahrenheit
Celsius

Anti short-cycle time

___hour ___min ___sec

Alarm silence time

___hour ___min ___sec

Power up with
Lockout

Clear lockout
Do NOT clear lockout

STAT & EnviraCOM
remote stat

Enabled
Disabled

Fig. 67. Fan configuration.

Table 33. Fan Configuration Parameters.
Parameter

Table 32. R7911 System
Configuration Parameters.

Comment

Absolute maximum
fan speed

500–12000 RPM

Absolute minimum
fan speed

500–12000 RPM

Fan gain down

0-100

Fan gain up

0-100

Flame sensor type

Flame rod
UV

Minimum duty cycle

1-100%

Modulation output

4-20ma
0-10V
Fan PWM

PWM frequency

Blower/HSI

Blower
Hot surface ignitor

1000
2000
3000
4000

Slow down ramp

0-12000 RPM/sec

Temperature units

Fahrenheit
Celsius

Speed up ramp

0-12000 RPM/sec

Parameter

Comment

Pulses per revolution 1-10

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Lead Lag Slave Configuration
Parameters (Hydronic Control Only)

Use the left and right arrows to switch between Modulation,
CH, DHW, Frost Protection, Warm Weather Shutdown,
Algorithms, Rate Allocation, Add stage and Drop stage
parameters.

Table 34 displays Lead Lag Slave Configuration parameters.

Fig. 68. Lead Lag slave configuration.

Fig. 69. Lead Lag master configuration and Advanced
Settings button.

Table 34. Lead Lag Slave
Configuration Parameters.

Table 35. Lead Lag Master Configuration Parameters.

Parameter

Comment

Slave enable

Slave
ModBUS slave
Disabled

Master enable

Enabled
Disabled

CH setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Slave mode

Use first
Use last
Equalize run time

CH time of day
setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Base load rate

0–6000 rpm

ModBus port

Slave sequence
order

0–8

MB1
MB2
No port

ModBus address

1–250

Demand to firing
delay

___hour ___min ___sec

Fan rate during off
cycle

0–12000 rpm

ModBus port

MB1
MB2
No port

ModBus address

0–250

Table 36. Lead Lag Master Configuration
Advanced Settings: Modulation Parameters.
Parameter

Comment

Modulation backup
sensor

Lead outlet sensor
Slave outlet sensor average
Disabled

Off hysteresis

Lead Lag Master Configuration
Parameters (Hydronic Control Only)

0 °F to 234 °F
(-17 °C to 112 °C)

On hysteresis

0 °F to 234 °F
(-17 °C to 112 °C)

Table 35 displays Lead Lag Master Configuration parameters.

Hysteresis step time

___Hour ____Minute _____Second

Click the Advanced Settings button to see available advanced
parameters as shown in Table 36–44.

P gain

0 - 400

I gain

0 - 400

D gain

0 - 400

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 37. Lead Lag Master Configuration
Advanced Settings: Central Heat Parameters.
Parameter
Demand switch

Setpoint source

Table 41. Lead Lag Master Configuration
Advanced Settings: Algorithms Parameters.

Comment

Parameter

Comment

Stat
Remote Stat
ModBus Stat
Disabled

Lead selection
method

Local
ModBus
4-20 ma

Lead rotation time

___day ____hour _____min

Force lead rotation
time

___day ____hour _____min

Lag selection method Sequence order
Measured run time

Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Time of day setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

4 ma water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

20 ma water
temperature

-40 °F to 266 °F (-40 °C to 130 °C)

Outdoor reset

Enabled
Disabled

Table 42. Lead Lag Master Configuration
Advanced Settings: Rate Allocation Parameters.
Parameter
Base load common

Parameter

Comment

Priority source

DHW heat demand
Disabled

Priority method

Boost during priority time
Drop after priority time

DHW priority override ___Hour ____Minute _____Second
time

Comment

Method

Error threshold
Firing rate threshold
Disabled

Detection time

___Hour ____Minute _____Second

Error threshold

0 °F to 234 °F (-17 °C to 112 °C)

Rate offset

+ ________ %

Interstage delay

___Hour ____Minute _____Second

Table 44. Lead Lag Master Configuration
Advanced Settings: Drop Stage Parameters.

Table 39. Lead Lag Master Configuration
Advanced Settings: Frost Protection Parameters.
Parameter

Comment
? %

Table 43. Lead Lag Master Configuration
Advanced Settings: Add Stage Parameters.

Table 38. Lead Lag Master Configuration
Advanced Settings: DHW Parameters.
Parameter

Sequence order
Measured run time

Parameter

Comment

Enable

Enabled
Disabled

Method

Outdoor setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

Detection time

___Hour ____Minute _____Second

____%

Error threshold

0 °F to 234 °F (-17 °C to 112 °C)

Frost protection rate

Table 40. Lead Lag Master Configuration Advanced
Settings: Warm Weather Shutdown Parameters.
Parameter

Error threshold
Firing rate threshold

Rate offset

+ ________ %

Interstage delay

___Hour ____Minute _____Second

Comment

Enable

Enabled
Disabled

Setpoint

-40 °F to 266 °F (-40 °C to 130 °C)

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

DETAILS

R7910A or R7911 Status
Data in Tables 45–Table 56 are displayed on the R7910A
Hydronic or R7911 Steam status pages. A complete list of
Status tables can be found in Table 60 on page 53.

Details of the hydronic or steam system is accomplished
through the detail status pages. The detail status page is
shown below.

The CH status data shown in Table 45 displays first when the
CH Hydronic heating loop is selected on the Home page.

Screens will appear only if they are configured for your system.
Information shown is current status. For example: firing rate is
the current fan speed or motor position; timing shown is current
time Sola is at.

Table 45. CH Hydronic Status.
Data
CH enable

Enabled, Disabled

CH burner demand

On or Off

CH pump

On or Off

CH pump demand

On or Off

CH pump overrun
time

Running overtime for CH pump
(seconds)

CH requested rate

RPM or %

CH OFF setpoint

Setpoint plus hysteresis

CH setpoint

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

CH ON setpoint

Setpoint minus hysteresis

CH setpoint source

Normal, TOD, Outdoor reset, Remote
control

CH status

Disabled, Normal, Suspended

Demand source

Sensor only, Sensor and Stat terminal,
Sensor and Remote Stat, LCI and
sensor

Outlet high limit

Yes or No

Outlet high limit
setpoint

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

Outlet sensor state

None, Normal, Open, Shorted,
Outside high range, Outside low
range, Not reliable (None = no outlet
sensor)

Outlet temperature

Outlet temperature (same as bar
graph)

Fig. 70. Hydronic CH detail status page.
Status information on the detail status page is organized into
groups and displayed on the page one group at a time. The
user moves from one group to another using the left and right
arrow buttons.
Status data on the detail status page is displayed in a menu for
the group that is currently displayed. If more status items exist
in the group than will fit on the screen, a vertical scroll bar
allows the user to see all status data. If the user selects a line
of status data in the menu, it will expand in bigger, more easily
readable text, as show in Fig. 71. Additional information about
Status data and groups that are displayed are provided in the
R7910A or R7911 Status section of this document.

Comment

Fig. 72. CH Hydronic Status menu (top).
Fig. 71. Hydronic “expanded” detail status.
65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 46. DHW Hydronic Status. (Continued)
Data

Comment

DHW high limit

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

DHW high limit
setpoint

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

DHW priority override 0-600 seconds
time
DHW pump

On or Off

DHW pump demand On or Off
DHW pump overrun
time

Running overrun time for DHW pump
(seconds)

DHW requested rate RPM or %
DHW sensor state

None, Normal, Open, Shorted,
Outside high range, Outside low
range, Not reliable (None = no outlet
sensor)

DHW OFF setpoint

Setpoint plus hysteresis

DHW setpoint

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

DHW ON setpoint

Setpoint minus hysteresis

Fig. 73. CH Hydronic Status menu (middle).

DHW setpoint source Normal, TOD, Outdoor reset
DHW status

Disabled, Normal, Suspended

DHW temperature

DHW temperature (same as bar
graph)

The bar graph displayed for the CH control loop (hydronic) is
the outlet sensor temperature; for the DHW control loop it is
the DHW sensor temperature. When no analog DHW sensor is
installed (digital switch instead), the inlet sensor temperature is
displayed.

Fig. 74. CH Hydronic Status menu (bottom).
The status data in Table 46 displays first when the DHW
Hydronic heating loop is selected on the Home page. Scrolling
through the status groups eventually shows both.
Table 46. DHW Hydronic Status.
Data

Comment

DHW enable

Enabled, Disabled

Demand source

Unknown, No source demand, CH,
DHW, Lead Lag, CH frost protection,
DHW frost protection, No demand due
to burner switch

DHW burner demand On or Off

Fig. 75. DHW Hydronic Status menu (top).

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 47. Burner Control Status. (Continued)
Data

Comment

Firing rate

% or RPM. Adjustable when firing rate
control set to Manual.

Firing rate control

Auto or Manual

Flame signal

Flame signal strength

Hold code

Description of hold message if locked
out

Lockout

Description of lockout message if
locked out

Pilot test hold

Off or Hold

Remote STAT

On or Off

Note: Steam will show Steam psi as the bar graph
The bar graph displayed for this status is the outlet sensor
temperature.

Fig. 76. DHW Hydronic Status menu (middle).

Fig. 77. DHW Hydronic Status menu (bottom).

Fig. 78. Burner Control Status menu (top).

Burner Control Status
The Burner Control status page will display the status data
shown in Table 47.
Table 47. Burner Control Status.
Data

Comment

Alarm reason

Description for alarm being on (maybe
lockout or a hold message)

Annunciator first out

First annunciator input related to
lockout

Annunciator hold

First annunciator input related to hold

Burner state

Disabled, Locked out, Anti-short cycle,
Unconfigured safety data, Standby
Hold, Standby, Delay, Normal
Standby, Preparing, Firing, Postpurge

Sequence time

Running time for timed burner control
operation (seconds)

Delay time

Running display of delay time when
burner control in delay state.

65-0303—05

Fig. 79. Burner Control Status menu (bottom).
Burner control can be turned on and off in the R7910A or
R7911 by the user.
40

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Hydronic Demand and Modulation
Status
Table 49 displays the status page data for R7910A.
Table 48. Hydronic Demand and Modulation Status.
Data

Comment

Demand source

CH, DHW, Lead Lag, or Frost
Protection (parameter that has current
priority)

Firing rate

% or RPM. Adjustable when firing rate
control set to Manual.

Demand rate

% or RPM.

Rate limiter

None, Outlet high limit, Delta T limit,
Stack limit, Slow start limit, Anticondensation, Minimum modulation,
Forced rate

Limited rate

% or RPM

Rate override

Burner control default, Burner control,
manual firing rate off, None

Inlet Temperature Status

Override rate

% or RPM

Table 49 displays the status page data for R7910A inlet
temperature.

Fig. 81. Demand and Modulation Status menu (bottom).

The bar graph displayed for this status is the outlet sensor
temperature.

Table 49. Inlet High Limit Status.
Data

Comment

Inlet sensor state

None, Normal, Open, Shorted,
Outside high range, Outside low
range, Not reliable (None=no outlet
sensor)

Inlet temperature

Inlet sensor temperature (same as bar
graph)

The bar graph displayed for this status is the inlet sensor
temperature.

Fig. 80. Demand and Modulation Status menu (top).

Fig. 82. Inlet High Limit Status menu.

Fan Status
Table 50 displays the status page data for the fan in the control.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 50. Control Fan Status.
Data

Comment

Fan speed

% or RPM (current fan speed)

Maximum fan speed

Setpoint of maximum fan speed (% or
RPM)

Minimum fan speed

Setpoint of minimum fan speed (% or
RPM)

The bar graph displayed for this status is the fan speed.

Fig. 84. Hydronic CH pump status menu.

Flame Detection Status
The status data shown in Table 52 is displayed for flame
detection in the R7910A or R7911.
Table 52. Flame Detection Status.
Data

Fig. 83. Control Fan Status menu.

Hydronic Pump Status
Table 51 displays the status page data for this example,
Central Heat pump in the R7910A. Screens available for DHW,
Boiler, System, Aux1 and Aux2 will be the same if that pump is
configured.

Comment

Flame detected

Yes or No

Flame signal

Flame signal strength (same as bar
graph)

Pilot test hold

Off or hold

The bar graph displayed for this status is the flame signal.

Table 51. Hydronic CH Pump Status.
Data

Comment

CH Pump

On or Off

Controlling Pump
Terminal

Pump A, B, or C

Status

On, Off, or Not Used

Delay time

Duration of delay time

Overrun time

Duration of overrun time

Frost overrun time

Duration of frost overrun time

Idle days

Number of days idle

Cycle count

Number of cycles
Fig. 85. Flame Detection Status menu.
NOTE: This same status is also displayed for burner control
status. A separate status group is defined to provide a
bar graph of the flame signal.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Statistics Status

Stack Limit Status

Table 53 displays the statistics status page data for the
R7910A or R7911. Though the Steam control will not have a
pump, the output can be used to run some other auxiliary
equipment.

Table 54 shows the status page data for the control Stack Limit.
Table 54. Stack Limit Status.
Data

Table 53. Control Statistics Status.
Data

Comment

Burner cycles

Number of cycles

Burner run time

Duration of run time

CH pump cycles

Number of cycles

System pump cycles Number of cycles
Controller cycles

Number of cycles

Controller run time

Duration of run time

The bar graph displayed for this status is the outlet sensor
temperature.

Comment

Stack limit enable

Enabled or Disabled

Stack limit

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

Stack limit setpoint

Temp setting between -40 °F to 266 °F
(-40 °C to 130 °C)

Stack sensor state

None, Normal, Open, Shorted,
Outside high range, Outside low
range, Not reliable (None=no stack
temp sensor)

Stack temperature

Stack sensor temperature (same as
bar graph)

The bar graph displayed for this status is the stack sensor
temperature.

Fig. 86. Control Statistics Status menu (top).
Fig. 88. Stack Limit Status menu.

Lead Lag Slave Status - Hydronic
Only
Table 55 shows the status page data for Lead Lag Slave.
Table 55. Lead Lag Slave.
Data
Type

Comment
Slave

Command Received Yes/No
Demand

Off

Request Rate

RPM

Burner Control

Standby

Modulating

Priority

Fig. 87. Control Statistics Status menu (bottom).

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Fig. 89. Lead Lag Slave Status menu.

Fig. 90. Lead Lag Master Status menu.

Lead Lag Master Status - Hydronic
Only

R7910A OR R7911
DIAGNOSTICS

Table 56 shows the status page data for Lead Lag Master.

The diagnostic page displays analog and digital I/O status of
the control. The digital I/O data is displayed as LEDs that are
either on (green) or off (red) (see Fig. 91–93). Not all digital I/O
can be displayed at the same time on the page, so a horizontal
scroll bar is used to move the view left and right to show all
digital I/O data.

Table 56. Lead Lag Master.
Data

Comment

Master enabled

Enabled

Status

normal

Demand source

Lead lag slave

Active Service

None

Off setpoint

160 °F (71 °C)

Setpoint

150 °F (66 °C)

On setpoint

145 °F (63 °C)

operating
temperature

150 °F (66 °C)

Sensor state

normal

Sensor temperature

150 °F (66 °C)

Slave firing

Stager state

idle

Stager timer
CH demand
CH frost demand

DHW frost demand

65-0303—05

Fig. 91. Diagnostic digital I/O page (left).

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 57. Control Digital I/O Data.
Data

Fig. 92. Diagnostic digital I/O page (center).

Comment

Pump C

On/Off

Blower/HSI

On/Off

Pilot valve

On/Off

Main valve

On/Off

Load Control Input

On/Off

STAT

On/Off

Pre-ignition interlock

On/Off

Interlock

On/Off

External ignition

On/Off

Alarm

On/Off

Pilot test hold

On/Off

Time Of Day

On/Off

Safety relay

On/Off

Low Gas

On/Off

High Gas

On/Off

Annunciator 3

On/Off

Annunciator 4

On/Off

Annunciator 5

On/Off

Annunciator 6

On/Off

Annunciator 7

On/Off

Annunciator 8

On/Off

PM Lead/Lag

On/Off

“On” status is indicated by a green LED and “Off” status is
indicated by a red LED.
Table 58. Control Analog I/O Data.
Data

Fig. 93. Diagnostic digital I/O page (right).

Comment

Outlet

Temperature sensors or pressure sensors also display the
current sensor state, (i.e., whether there is a fault condition or
the sensor is in a normal monitoring state). The user can toggle
between displaying the control digital and analog I/O (the initial
display is the digital I/O). The Digital or Analog button on the
bottom of the diagnostic page changes the I/O displayed to the
type indicated by the button.
The following data is displayed on the control diagnostics page
(see Fig. 91–93).

Inlet

If enabled

Firing rate

% or RPM

Flame signal

Fan speed

RPM (if applicable). Should
match with firing rate.

Domestic Hot Water

If enabled

Stack

If enabled

Outdoor

If enabled

Table 57. Control Digital I/O Data.

Header

If enabled

Data

Analog I/O data is displayed as bar charts depicting the I/O
level (see Fig. 94). Analog I/O that is not enabled for the
installation displays a blank I/O level. To see all analog I/O, use
the horizontal scroll bar to move the view left and right.

Comment

Pump A

On/Off

Pump B

On/Off

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

INSTALLER CHECKOUT
Diagnostics Tests
Pressing the Diagnostics Test button launches the diagnostic
tests. The first test displayed on the right side of the screen is
the last selected test shown, as seen in Fig. 97.
This screen enables the user to perform the following tests:
Modulation Test: enables the user to verify that the burner is
firing at the correct rate. (See Fig. 97.)
Pilot Test: enables the user to verify that the pilot valve is
functioning properly. The user can also perform burner
adjustments for the pilot flame. (See Fig. 98.)
Pump Test: enables the user to verify that the correct pump is
on or off. The Start Test button will test all pumps; pressing an
individual pump tests that pump only. (See Fig. 99.)
Burner Switch: this button turns the burner on or off.
Start Test: runs the test for 5 minutes.
Fig. 94. Diagnostics analog I/O page (left).

Fig. 97. Modulation test.
Fig. 95. Diagnostics analog I/O page (center).

Fig. 98. Pilot test.
Fig. 96. Diagnostics analog I/O page (right).

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

If Contrast or Volume are changed, Fig. 101 displays to allow
saving these changes.

Fig. 99. Pump test.

S7999B OR S7999C
DISPLAY SETUP AND
DIAGNOSTICS

Fig. 101. Setup settings changed.

Cleaning the Screen
When the user wants to clean the touch screen, the CLEAN
SCREEN button is selected to freeze touch input temporarily for
30 seconds to allow the user to clean the screen. (See Fig. 102.)

The following pages apply to display setup and diagnostics for
the S7999B or S7999C OI Displays.

Setup
The Setup button on the Home page (for S7999B OI Display)
or Display Setup Button on the Configuration Screen for the
S7999C OI Display is selected to go to these pages. The Setup
screen (see Fig. 100) is displayed first. It allows for some OI
Display settings. The Advanced Setup button permits the user
to run some diagnostic functions for the display and to set
advanced features for run-time operation. See “Advanced
Setup” on page 48 for these features.

Fig. 102. Clean screen setup.
A countdown screen (Fig. 103) displays during the screen
disable period. It disappears when the touch screen is
re-enabled.

Fig. 100. R7910A setup.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Fig. 105. Ethernet settings.

Fig. 103. Screen disabled for cleaning.

A Honeywell software server connectivity check can be
performed by selecting the Check button. This button is only
enabled when the Ethernet interface is enabled and active.
The connectivity check tries for 15 seconds to connect to the
Honeywell software server. Successful connection displays a
“CONNECTED” message on the screen. An unsuccessful
attempt displays “NOT CONNECTED.”

Pressing the SYSTEM CONFIGURATION button starts up the
system configuration. For more information, see “System
Configuration (S7999B OI DisplayOnly)” on page 19.
Pressing the ADVANCED SETUP button starts the Advanced
Setup.

ADVANCED SETUP

The MAC (Media Access Control) address is a hardware
address that uniquely identifies the S7999B on the network.
This information is likely only of interest to the network
administrator.

Pressing the ADVANCED SETUP button on the Setup page
displays more options that can be set by the user (Fig. 104).

The IP (Internet Protocol) address is the address that the
S7999B has been assigned by the DHCP server in the local
network to use for others to access the S7999B. This address
is necessary for the remote user to identify the S7999B in an
FTP (File Transfer Protocol) application for transferring trend
analysis information. Like the MAC address, it is displayed for
informational purposes for the network administrator.
If the IP address has a private network designation (192.x.x.x),
remote access from outside the local network may not be
possible. Contact the network administrator for assistance in
this case. If the IP address is 255.255.255.255, then no IP
assignment has been made, and there is no connection to the
network. This possibility could be due to no physical
connection to an Ethernet network, or there is no DHCP server
present on the Ethernet network. Check with the network
administrator for assistance.
The Gateway IP address is displayed for informational
purposes for the network administrator. The gateway node
provides remote access for devices located off of the local
network to the S7999B.

Fig. 104. Advanced Setup.

The Enable Network checkbox specifies that the Ethernet
interface is on or not when the S7999B is powered up. The
selection must be saved to permanent storage (flash) with the
Save button for it take effect at boot time. This checkbox
should normally be disabled, and enabled when Ethernet
access to the S7999B is necessary. This interface must also
be enabled for the Software Server Connectivity check to
function properly (the Check button). If the Ethernet interface is
disabled, the check procedure fails.

Ethernet Settings (S7999B Only)
Ethernet Settings is used to enable Ethernet communications
for remote diagnostics, file transfers, and remote support, and
is not typically enabled (Fig. 105). This feature should remain
disabled unless directed to do so for remote troubleshooting.
Once the feature is enabled, the S7999B must be reset to start
it at power-up. The Ethernet interface can also be used to
transfer profile curve files to/from the S7999B over a local
intranet or the Internet.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

The status variable with the largest range (minimum to
maximum) is used as the Y-axis range in the graph.

The S7999B must be assigned an IP address by a DHCP
server for it to operate on the local network, so the Use DHCP
box should be checked. However, because the S7999B
requires this feature, it ignores the checkbox and always
regards it as checked. The checkbox is included for future
purposes when dynamic IP addressing isn’t required.

As the status variables are selected they are listed in a trend
variables list box. The user chooses the status variables from a
drop down menu and then presses the Add button to add each
status variable to the trend variable list. See Fig. 108. After all
status variables have been selected press the Show button to
view the trend analysis graph.

Trend Analysis Page (S7999B Only)
Trend analysis of R7910 or R7911 status data can be viewed
on the S7999B. A graph displays a historical view of R7910 or
R7911 status data over varying time periods.
A 2-dimensional graph with status data values shown on the Y
axis over time specified on the X axis is displayed. Status for
the most recent time is represented on the left side of the
graph with older status running towards the right side of the
graph.

Fig. 108. Trend analysis menu page.
Each status variable displayed in the trend analysis is
represented by a different colored line, as follows:
1.
2.
3.
4.
Fig. 106. Trend analysis page.

First status variable = green
Second status variable = yellow
Third status variable = red
Fourth status variable = blue

No more than two different measurement units (such as
degrees), are allowed for the status variables selected in the
trend analysis graph. Attempts to add a status variable with a
third measurement unit are rejected.

Up to 4 R7910 or R7911 status variables can be viewed at the
same time on one trend analysis graph. Select the status
variables for the graph on the menu page (see Fig. 107). This
menu displays when the Trend Analysis button is selected on
the R7910 or R7911 status page.

A second Y axis is displayed on the right side of the graph to
represent the scale for the second measurement unit. This can
result in minor clipping of the curves on the right side, as
shown in Fig. 109 and 110.

Fig. 107. Trend analysis menu page.

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

the graph so the Y axis depicts different degrees of detail for
the data range. The viewing window can be moved up and
down the graph to see the complete range when zoomed in.
The smallest measurement interval is a single whole digit (no
fractional precision) when the entire range exceeds 10 units,
e.g., 20–30 degrees.
Pressing the Stop button will pause trend data updates of the
graph. The graph “freezes” the view when stopped. However,
trend data sampling from the R7910 or R7911 continues
regardless whether the graph update is stopped or not.
Restarting the updates causes the graph to be refreshed with
the latest data samples.
Pressing the Clear button will clear the trend sample data for
an R7910 or R7911. All trend data for the R7910 or R7911 is
cleared including status variables that are not included in the
graph. The user is asked to confirm this action before
proceeding.
Fig. 109. Trend analysis page with firing rate.

NOTE: For system trend analysis graphs the Clear button
isn’t present, so no status variables can be cleared.
A snapshot of the trend analysis graph can be taken and saved
to the S7999B. The user is asked to confirm the save before it
occurs.
NOTE: While this snapshot is saved, trend data sampling for
all R7910s or R7911s is temporarily halted. Gaps or
static level values occur in the trend data as a result.
The date and time that the snapshot is taken is stored with the
snapshot. Only the status variables displayed in the graph are
stored in the snapshot. All raw sample data for the status
variables are stored so that any sample rate can be viewed
offline.
Sample data stored in snapshot is either the real-time status at
the time that the Save button is pressed or it is the sample data
at the time that the graph is stopped.
Special case trend analysis graphs for PID tuning can be
viewed for CH, DHW, and Lead Lag demands.

Fig. 110. Trend analysis page with demand source.
If any of the status variables has degrees as a unit of
measurement, degrees is used for the main Y axis (on the left
of the graph). The status variables selected are saved and are
displayed by default when the trend analysis menu page is first
displayed. Status data is updated on the graph with new status
at the same rate as the sample time period selected. The
current sample time period is displayed in a button on the page
(in Fig. 109 and 110, the button is “Seconds”).
Status older than the sample time period is dropped from the
right end of the curve as newer status appears on the left end
of the curve.
Trend data can be viewed in one-second (most recent 60
second time period), 15-second (most recent 15-minute time
period), and hour (most recent 24 hour time period) intervals.
NOTE: Full graphs require that the S7999B has been monitoring the R7910 or R7911 for the complete time
period. Partial graphs display if this is not the case.

Fig. 111. PID Trend analysis page.

The buttons at the bottom can be used to change the view of
the graph. The user can change the sample rates of the
display by pressing the Seconds, Minutes, Hours, or Days
button (the button changes depending on what sample rate is
currently displayed). The + and - buttons zoom in and out of
65-0303—05

Data included in the PID analysis graph are:
• Sensor temperature (outlet for CH, DHW for DHW, and
header for Lead Lag)
50

•
•
•
•

Table 59. R7910/R7911 Trend Analysis Data. (Continued)

Setpoint (for corresponding demand source)
Burner firing rate
Hysteresis on (for corresponding demand source)
Hysteresis off (for corresponding demand source)

Data

Comment

Stack temperature

If enabled

The Clear button is disabled for the PID analysis (doesn’t apply to
hysteresis).

Header temperature (R7910
only)

If enabled

The default sample rate is 15 sec periods (a tick mark on the X axis
for every 15 second period, with minutes displayed every 4 tick
marks).

CH setpoint

Actual CH setpoint based on
time of day (TOD).

DHW setpoint (R7910 only)

Actual DHW setpoint based
on TOD.

Special case trend analysis graph for R7910/R7911 vessel heat
exchange can be selected.

Central Heat Operation
Analysis
Domestic Hot Water
Operation Analysis (R7910
only)
Vessel Analysis

Trend Analysis Snapshot
The trend analysis snapshot file is stored in Comma Separated Value
(CSV) format in the S7999B so it can be imported into a spreadsheet
program such as Microsoft Excel.
The trend analysis snapshot file can be viewed in graph form on the
S7999B. It is also accessible in an Ethernet FTP session with the
S7999B. This FTP session can be used to export the trend analysis
snapshot file from the S7999B.

Diagnostics
Fig. 112. Vessel analysis page.

Pressing the Diagnostics button permits some display hardware
diagnostics (see Fig. 104). Normally, these diagnostics are
applicable only for factory testing purposes, but conditions may
arise that warrant this testing.

Data included in the vessel analysis graph are:
•
•
•
•

Outlet temperature
Inlet temperature
Heat exchange (outlet – inlet)
Burner firing rate

Automatic sampling of trend data takes place when the trend
analysis report is displayed. No user intervention is necessary to
invoke sampling.
NOTE: Sample data is collected and stored in the S7999B. The
R7910 or R7911 don’t collect any historical data for trending
purposes. For this reason any S7999B reset causes all
R7910 or R7911 sampling to start over with no data.
Trend analysis of the following data from each R7910/R7911 is
possible:
Table 59. R7910/R7911 Trend Analysis Data.
Data
Demand source

Fig. 113. Display diagnostics.

Comment
CH, DHW, LL (Lead Lag), or
FP (Frost Protection) Steam
Sensor

NOTE: COM 1 Communication test is a factory-only test. Performing this text when not connected to a factory test fixture will
always yield a “Failed” result.

Firing rate

% or RPM

Each test is invoked by pressing the Test button next to the
diagnostic. The results of the diagnostic test (“PASS” or “FAIL”)
display in the text box next to the Test button.

Fan speed

PWM feedback

Flame signal strength

Date and Time

Inlet temperature (R7910
only)

If enabled

DHW temperature (R7910
only)

If enabled

Display time can be configured in the S7999B and S7999C OI
Displays and applied to the R7910A or R7911. A date and time is
entered by the user at the display and any data that is timestamped is
marked with the current time and date in the display.

Outdoor temperature

If enabled

Outlet temperature (R7910
only)

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

The Display clock is set by selecting the Date and Time button
on the Advanced Setup page. A screen similar to the following
figure (Fig. 114) displays.
NOTE: It’s important that the time be set in the Display so
correct timestamps are given to the R7910A or
R7911 lockouts. The display’s time and date need
to be set should power be interrupted to the display.

Fig. 116. Code Version—bottom view.

User Preferences
The User Preferences button displays General options as well
as those for for COM1 and COM2.

Fig. 114. Display Date and Time.
Edit the date and time and press the OK button to set the new
settings. Press the Cancel button to exit without changing the
time or date.

Version
Pressing the Version button on the Advanced Setup page
displays manufacturer and software version information (Fig.
115 and 116).

Fig. 117. General tab.
The General tab (see Fig. 117) contains the following settings:
• Display alerts on Status Summary Bar? This determines
whether non-safety alerts will be shown on the summary bar
of the home page.
• Display empty parameter groups? This cleans up the
home page by hiding unused parameter groups.
• Automatic synchronization with control when
connections is made? This allows automatic display of
new control to update when the connection is identified
instead of manually making the synchronization when the
operator is ready.
• Sound Audio Alarm for faults? This uses the display
speaker to sound an alarm on shutdown for SOLA faults.

Fig. 115. Code version—top view.

The COM1 tab (see Fig. 118) contains the following setting:
• Modbus address range 1-N: Sets the Modbus address for
the connected device (range is 1 to 250).

65-0303—05

Fig. 118. COM1 tab.

S7999B Only
COM2 is a Modbus gateway for Building Automation System (BAS)
networking.

Fig. 120. Processor Reset.
When the Display is reset, the display will reboot and automatically
seek out the Modbus™ device connected to it. When the search is
complete, the display will return to the home page.

Press the COM2 tab (see Fig. 119) to define settings:
• Enable Modbus Gateway: This box must be selected to enable
the COM2 BAS interface.
• Modbus Gateway Speed: Select the baud rate (38400, 19, 200,
or 9600 bps)
• Modbus Gateway Timeout: Defines how long the BAS will wait
after sending a Modbus message before timing out and sending
the next modbus message (currently non-functional; leave at 1.0)

Table 60. Status Tables.
Name

Table #

Page #
38

DHW

Burner Control

Demand and Modulation

Inlet High Limit

Fan

Pump

Flame Detection

Statistics

Stack Limit

Lead Lag Slave

Lead Lag Master

Parameters
A complete list of configurable parameters is shown in Table 61.
Table 61. Configurable Parameters.
Fig. 119. COM 2 tab.
Parameter

Display Reset
The user can reset the display and force a power-up by pressing the
Display Reset button. A pop-up dialog box confirming the reset
request displays (Fig. 120) before the reset proceeds.

Comment

Table Page
#
#

Boiler Name

Name to identify boiler (up to 20 6
characters)

Installation

Notes regarding installation (up
to 20 characters)

Installer
password

Change installer password
setting

OEM
password

Change OEM password setting

Factory Data OEM name to associate with
boiler (up to 20 characters)

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

CH enable

Disable or Enable Central
Heating Loop

CH demand
switch

Sensor for Central Heat
demand:
Sensor only
Sensor & STAT terminal
Sensor & Remote Stat
LCI & Sensor

Table Page
#
#
8

Parameter

Comment

Steam
enable

Disable/enable steam feature

Steam
demand
source

Sensor and LCI
Sensor and Remote Stat
Sensor and Stat Terminal
Sensor Only

Steam
pressure
setpoint

Setpoint for normal modulation
Adjustable 0 to 15 or 0 to 150
(sensor dependant)

Steam time
of day
setpoint

Setpoint when TOD switch on
Adjustable 0 to 15 or 0 to 150
(sensor dependant)

CH Outdoor
reset

Enabled
Disabled

CH has
priority over
Lead Lag

Yes, No, Cancel

CH Setpoint
source

Local
S2 (J8-6) 4-20mA

Minimum
steam
pressure

CH Setpoint

Setpoint for normal Central
Heat modulation:
-40 °F to 266 °F
(-40 °C to 130 °C)

Establishes setpoint for the
4ma. input.
Adjustable 0 to 15 or 0 to 150
(sensor dependant)

Steam
pressure off
hysteresis

CH time of
day setpoint

Setpoint when Time Of Day
switch is on. -40 °F to 266 °F
(-40 °C to 130 °C)

Differential below setpoint when
boiler is turned off
Adjustable 0 to 15 or 0 to 150
(sensor dependant)

CH off
hysteresis

Differential above setpoint
when boiler is turned off. -40 °F
to 266 °F (-40 °C to 130 °C)

Steam
pressure on
hysteresis

Differential from setpoint when
boiler
is turned on.
Adjustable 0 to 15 or 0 to 150
(sensor dependant)

CH on
hysteresis

Differential from setpoint when
boiler is turned on.-40 °F to 266
°F (-40 °C to 130 °C)

Steam
hysteresis
step time

Time between hysteresis
changes 0 to 600 seconds
(0=disable)

4 mA water
temperature

-40 °F to 266 °F
(-40 °C to 130 °C)

Steam P
Gain

Gain applied for the P portion of
the PID equation
0-400

20 mA water -40 °F to 266 °F
temperature (-40 °C to 130 °C)
Modulation
sensor

Modulation
Local
Rate Sensor
Time between hysteresis step
changes: 0-400

CH I-gain

Time between hysteresis step
changes: 0-400

CH D-gain

Time between hysteresis step
changes: 0-400

Hysteresis
step time

Time between hysteresis step
changes: 0-600 seconds
(0=Disable hysteresis stepping)

Steam D
Gain

Gain applied for the D portion of
the PID equation
0-400

Steam 4-20
ma remote
control

uses 4-20ma remote control
function to control either the
setpoint or modulation for
Steam
Disable, setpoint, modulation

CH maximum -40 °F to 266 °F
(-40 °C to 130 °C)
outdoor
temperature
CH minimum -40 °F to 266 °F
outdoor
(-40 °C to 130 °C)
temperature
Low water
temperature

-40 °F to 266 °F
(-40 °C to 130 °C)

Minimum
water
temperature

-40 °F to 266 °F
(-40 °C to 130 °C)

Maximum off -40 °F to 266 °F
point
(-40 °C to 130 °C)

65-0303—05

Steam I Gain Gain applied for the I portion of
the PID Equation - 0-400

Outlet sensor, Inlet sensor, S5
(J8-11)

CH P-gain

Table Page
#
#

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

Table Page
#
#

DHW enable Disable or Enable Domestic Hot 11
Water Loop
DHW
demand
switch

Table 61. Configurable Parameters. (Continued)
Parameter

Tap detect
degrees

Sensor for Central Heat
demand:
DHW sensor only,
DHW sensor & Remote Stat,
DHW switch & inlet sensor, or
DHW switch & outlet sensor

DHW Sensor
Outlet Sensor
Inlet Sensor
Auto: DHW (S6) or Inlet Sensor
Auto: DHW (S6) or Outlet
Sensor

DHW on
hysteresis

Differential from setpoint when
boiler is turned on. 2 °F to
234 °F (-16 °C to 112 °C)

Tap stop
inlet-DHW
degrees

-0 °F to 180 °F (-17 °C to 82 °C)

Tap stop
outlet-Inlet
degrees

-0 °F to 180 °F (-17 °C to 82 °C)

Plate preheat -0 °F to 180 °F (-17 °C to 82 °C)
off hysteresis
Plate preheat -0 °F to 180 °F (-17 °C to 82 °C)
detect on
threshold
Plate preheat -0 °F to 180 °F (-17 °C to 82 °C)
detect off
threshold

Time between hysteresis step
changes: 0-600 seconds
(0=Disable hysteresis stepping)

Plate preheat ___hour ___min ___sec
minimum on
time

DHW priority Which system has priority:
vs CH
Central Heat over Domestic Hot
Water, or
Domestic Hot Water over
Central Heat

Plate preheat ___hour ___min ___sec
delay after
tap

DHW priority Which system has priority:
vs LL
Lead Lag over Domestic Hot
Water,
Domestic Hot Water over Lead
Lag
DHW P-gain Time between hysteresis step
changes: 0-400
DHW I-gain

___hour ___min ___sec

Plate preheat -0 °F to 180 °F (-17 °C to 82 °C)
on hysteresis

DHW priority ___hour ___min ___sec
override time
DHW
hysteresis
step time

Tap detect
minimum on
time

Plate preheat ___hour ___min ___sec
on
recognition
time

DHW time of Setpoint when Time Of Day
day setpoint switch is on. -40 °F to 240 °F
(-40 °C to 115 °C)
Differential above setpoint
when boiler is turned off. -40 °F
to 240 °F (-40 °C to 115 °C)

Plate preheat -40 °F to 266 °F
setpoint
(-40 °C to 130 °C)

-40 °F to 240 °F
(-40 °C to 115 °C)

DHW off
hysteresis

-0 °F to 180 °F (-17 °C to 82 °C) 13

Tap detect on -0 °F to 180 °F (-17 °C to 82 °C)
threshold

DHW Priority Boost during priority time
method
Drop after priority time

DHW
setpoint

Table Page
#
#

Tap detect on ___hour ___min ___sec
recognition
time

DHW Priority Which system has priority:
source
Disabled or
Heat Demand

DHW
Modulation
sensor

Comment

Warm
Weather
Setpoint
Enable

Enabled, disabled

Warm
Weather
Setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Time between hysteresis step
changes: 0-400

DHW D-gain Time between hysteresis step
changes: 0-400
DHW storage Enabled, Disabled
enable

Storage time ___hour ___min ___sec
Setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Off
hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

On
hysteresis

-0 °F to 180 °F (-17 °C to 82 °C)

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

CH maximum RPM or %
modulation
rate

Table Page
#
#
15

Parameter

Comment

Auxiliary
Auto
pump control On
Auxiliary
pump is on
when

RPM or %

Minimum
modulation
rate

RPM or %

CH forced
rate time

0-600 seconds

Boiler pump
control

Auto
On

CH forced
rate

RPM or %

Boiler pump
output

DHW forced
rate time

0-600 seconds

Pump A
Pump B
Pump C
None

DHW forced
rate

RPM or %

Slow start
degrees

-40 °F to 266 °F
(-40 °C to 130 °C)

Slow start
ramp

RPM /minute or %/minute
0-10/4-20 mA Output hysteresis

CH pump
control

Auto
On

CH pump
output

Pump A
Pump B
Pump C
None

System
Auto
pump control On
System
Pump A
pump output Pump B
Pump C
None

Pump control Auto
On

System
0-600 seconds
pump ourrun 0 = Not configured
time

Pump
0-600 seconds
exercise time 0= Not configured

Pump output Pump A
Pump B
Pump C
None

Auxiliary
0-999,999
pump cycles
Boiler pump
cycles

___hour ___min ___sec

0-999,999

Burner cycles 0-999,999

Overrun time ___hour ___min ___sec
Pump A
Pump B
Pump C
None

Burner run
time

0-999,999

CH pump
cycles

0-999,999

DHW pump
cycles

0-999,999

System
0-999,999
pump cycles
0-999,999
Auxiliary 2
pump cycles

65-0303—05

CH pump
0-600 seconds
overrun time 0 = Not configured

4-20 mA
input
hysteresis

Boiler pump
output

Boiler pump 0-600 seconds
overrun time 0 = Not configured

0-10/4-20 mA
Output
hysteresis

Pump start
delay

Auxiliary
Pump A
pump output Pump B
Pump C
None

CH slow start Enabled
enable
Disabled
Enabled
Disabled

CH pump is ON
Slave command

DHW
maximum
modulation
rate

DHW slow
start enable

Table Page
#
#

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

DHW high
limit

Enabled
Disabled

DHW high
limit
response

Suspend DHW
Recycle & hold
Lockout

Table Page
#
#
19

Parameter

DHW high
-40 °F to 266 °F
limit setpoint (-40 °C to 130 °C)
Outlet high
limit
response

Recycle & hold
Lockout

Outlet high
-40 °F to 266 °F
limit setpoint (-40 °C to 130 °C)
Stack limit

Enabled
Disabled

Stack limit
delay

0-600 seconds

Stack limit
response

Lockout
Recycle & delay

Stack limit
setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Delta T
enable

Enabled
Disabled

Delta T
degrees

-40 °F to 266 °F
(-40 °C to 130 °C)

Delta T delay 0-600 seconds
Delta T
response

Recycle & delay
Lockout

Delta T retry
limit
Delta T rate
limit enable

Enabled
Disabled

Delta T
inverse limit
time

___hour ___min ___sec

Delta T
inverse limit
response

Recycle & delay
Recycle & delay with retry limit
Lockout

Outlet T-rise
enable

Enabled
Disabled

0 °F to 234 °F
(-17 °C to 112 °C)

T-rise
response

Recycle & delay
Recycle & delay with retry limit
Lockout

T-rise retry
limit

0 to 100

T-rise delay

___hour ___min ___sec

Heat
exchanger
high limit
enable

Enabled
Disabled

Heat
exchanger
high limit
setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Heat
exchanger
high limit
response

Recycle & delay
Recycle & delay with retry limit
Lockout

Heat
exchanger
retry limit

0 to 100

Heat
exchanger
high limit
delay

___hour ___min ___sec

CH anticondensation
enable

Enabled
Disabled

CH anticondensation
pump

Normal (no change)
CH pump forced off

CH anticondensation
setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

DHW anticondensation enable

Enabled
Disabled

DHW anticondensation pump

Normal (no change)
DHW pump forced off

DHW anticondensation setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Table Page
#
#
23

Anticondensa Anticondensation is more
tion Priority important than (check those
that apply):
Stack limit
Delta T limit
Slow start
Forced rate
Outlet high limit

Heat
Enabled
exchanger T- Disabled
rise enable
T-rise
degrees

Comment

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

CH frost
protection
enable

Enabled
Disabled

DHW frost
protection
enable

Enabled
Disabled

Lead Lag
frost
protection
enable

Enabled
Disabled

Table 61. Configurable Parameters. (Continued)

Table Page
#
#
25

Parameter

DHW pump ___hour ___min ___sec
frost overrun
time
26

Annunciator 01 - Annunciator 1
(1–8) location 02 - Annunciator 2
03 - Annunciator 3
04 - Annunciator 4
05 - Annunciator 5
06 - Annunciator 6
07 - Annunciator 7
08 - Annunciator 8
PII - Pre-Ignition ILK
LCI - Load Control Input
ILK - Interlock
Up to 3 characters

Annunciator
(1–8) name

Up to 20 characters

65-0303—05

LCI enable

Enabled
Disabled

ILK/IAS open Recycle
response
Lockout

CH pump
___hour ___min ___sec
frost overrun
time

Annunciator
(1–8) short
name

Enabled
Disabled

No ILK check
Interlock
ILK check
(ILK) start
check enable

___%

Annunciation Enabled
enable
Disabled

PII enable

Table Page
#
#

Interrupted
Enable during purge and
air switch
ignition
(IAS) enable Disabled
Enable during purge

Outdoor frost -40 °F to 266 °F
protection
(-40 °C to 130 °C)
setpoint
(applicable for CH only)
Lead Lag
frost
protection
rate

Comment

ILK bounce
detection
enable

Enabled
Disabled

Purge rate
proving

Fan Speed
High Fire Switch
None

Lightoff rate
proving

Fan Speed
Low Fire Switch
None

Prepurge
rate

RPM or %

Prepurge
time

0-600 seconds
0 = Not configured

Run
stabilization
time

0-600 seconds
0 = Not configured

Standby Rate RPM or %

Postpurge
rate

RPM or %

Postpurge
time

0-600 seconds
0 = Not configured

Forced
recycle
interval time

___hour ___min ___sec

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

Pilot test hold On
Off

Table 61. Configurable Parameters. (Continued)

Table Page
#
#

Ignition
source

Hot Surface Igniter
External ignition
Internal ignition

Pilot type

Direct burner constant ignition
Direct burner pulsed ignition
Intermittent
Interrupted

Modulation
output

4-20mA
0-10V
Fan PWM*

Blower/HSI

Blower
Hot surface ignition

RPM or %

Preignition
time

0-600 seconds
0 = Not configured

Pilot Flame
Establishing
Period

15 secs
10 secs
4 secs

Igniter on
during

1st half of PFEP
Pilot Flame Establishing Period

Main Flame
Establishing
Period

15 secs
10 secs
5 secs

Flame
Threshold

μA/V

Ignite failure
response

Lockout
Recycle
Recycle & hold
Recycle & lockout

Ignite failure
delay

Comment

Flame sensor Flame rod
type
UV power tube
UV power tube with spark
interference
None

Lightoff rate

Parameter

Table Page
#
#
31

Temperature Fahrenheit
units
Celsius
Anti shortcycle time

0-600 seconds
0 = Not configured

Alarm silence 0-600 minutes
time
0 = Not configured
Power up
Clear lockout
with Lockout Do NOT clear lockout
STAT &
EnviraCOM
remote stat
30

Enabled
Disabled

Flame sensor Flame rod
type
UV

Modulation
output

4-20ma
0-10V
Fan PWM

0-600 seconds
0 = Not configured

Blower/HSI

Blower
Hot surface ignitor

Ignite failure
retries

1, 3, or 5

Temperature Fahrenheit
units
Celsius

MFEP flame
failure
response

Recycle
Lockout

Anti short
cycle time

Run flame
failure
response

Recycle
Lockout

Fan speed
error
response

Recycle
Lockout

0-600 minutes

Alarm silence 0-600 minutes
time

Power up
with lockout

Clear lockout
Do NOT clear lockout

Inlet
connector
type

0-15 psi
0-150 psi
UNCONFIGURED

Stack
connector
type

10k NTC dual safety
10k NTC single non-safety
12k NTC single non-safety
UNCONFIGURED

Header

4-20ma
UNCONFIGURED

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)
Parameter

Comment

Absolute
RPM
maximum fan
speed

Table 61. Configurable Parameters. (Continued)

Table Page
#
#
33

Parameter

RPM
Absolute
minimum fan
speed

Comment

Modulation
backup
sensor

Lead outlet sensor
Slave outlet sensor average
Disabled

Off
hysteresis

0 °F to 234 °F
(-17 °C to 112 °C)

Fan gain
down

0-100

On
hysteresis

0 °F to 234 °F
(-17 °C to 112 °C)

Fan gain up

0-100

Hysteresis
step time

___Hour ____Minute
_____Second

Minimum
duty cycle

1-100%

P gain

0 - 400

Pulses per
revolution

1-10

I gain

0 - 400

PWM
frequency

1000
2000
3000
4000

Slow down
ramp
Speed up
ramp

D gain

0 - 400

Demand
switch

Stat
Remote Stat
ModBus Stat
Disabled

0-12000 RPM/sec

Setpoint
source

0-12000 RPM/sec

Local
ModBus
4-20 ma

Setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Time of day
setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

4 ma water
temperature

-40 °F to 266 °F
(-40 °C to 130 °C)

20 ma water
temperature

-40 °F to 266 °F
(-40 °C to 130 °C)

Outdoor
reset

Enabled
Disabled

Priority
source

DHW heat demand
Disabled
Boost during priority time
Drop after priority time

Slave enable Slave
ModBUS slave
Disabled
Slave mode

Use first
Use last
Equalize run time

Base load
rate

0–6000 rpm

Slave
sequence
order

0–8

Demand to
firing delay

___hour ___min ___sec

Priority
method

Fan rate
during off
cycle

0–12000 rpm

DHW priority ___Hour ____Minute
override time _____Second

ModBus port MB1
MB2
No port
ModBus
address

0–250

Master
enable

Enabled
Disabled

CH setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

CH time of
day setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

ModBus port MB1
MB2
No port
ModBus
address

65-0303—05

0–250

Enable

Enabled
Disabled

Outdoor
setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Frost
protection
rate

____%

Enable

Enabled
Disabled

Setpoint

-40 °F to 266 °F
(-40 °C to 130 °C)

Table Page
#
#
36

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Table 61. Configurable Parameters. (Continued)

Table 61. Configurable Parameters. (Continued)
Parameter
Lead
selection
method

Comment
Sequence order
Measured run time

Table Page
#
#
41

Parameter

Table Page
#
#

Comment

Method

Error threshold
Firing rate threshold
Disabled

Lag selection Sequence order
method
Measured run time

Detection
time

___Hour ____Minute
_____Second

Lead rotation ___day ____hour _____min
time

Error
threshold

0 °F to 234 °F
(-17 °C to 112 °C)

Force lead
rotation time

___day ____hour _____min

Rate offset

+ ________ %

Base load
common

? %

Interstage
delay

___Hour ____Minute
_____Second

Method

Error threshold
Firing rate threshold
Disabled

Detection
time

___Hour ____Minute
_____Second

4-pin Connector Terminals

Error
threshold

0 °F to 234 °F
(-17 °C to 112 °C)

Lockout History

Alert Log

Rate offset

+ ________ %

Digital I/O Data

Interstage
delay

___Hour ____Minute
_____Second

Analog I/O Data

Table 62. Other Tables.
Name

Table #

Page #

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

65-0303—05

.330 (8)

3.50 (89)

.205 (5)

5.40 (137)

8.93
(227)

5.45
(138)

M28852

Fig. 121. S7999C front-mount template.
63

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

65-0303—05

M28851

Fig. 122. S7999C rear-mount template.

65-0303—05

4.30 (109)

5.45
(138)

8.93
(227)

1.50 (38)

.92 (23)

.75 (19)

5°

.330 (8)

3.50 (89)

.205 (5)

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

65-0303—05

S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE

Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
customer.honeywell.com

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Honeywell Local Operator Interface S7999B Users Manual 65 0303—05 S7999C SOLA

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