Honeywell EXCEL 12: FCU + LIGHT PRODUCT DATA

INTEGRATED ROOM CONTROL SOLUTIONS: FCU + LIGHT

 2-wire FTT-10A LONWORKS® bus interface
 LonMark® certified
 Easily-accessible service button and service LED
 Application can be configured to user-specific needs

via LNS™-based plug-in

 Applications can be downloaded via L

flash memory (thus increasing flexibility)

ONWORKS into

Excel 12

PRODUCT DATA

FEATURES

 Two-in-one controller for HVAC and lighting reduces

hardware costs and engineering effort (one

ONWORKS® node instead of two)

L

 HVAC application supports three sequences (heat,

cool or change-over) and min. / max. control limits and
air-quality control

 Light application supports three lamps. Up to two of

the three light loops can be constant light control
loops. Light switching can be done depending on light
level and occupancy (configurable via plug-in)

 Unused inputs can be utilized for monitoring via the

ONWORKS network

L

 Unused digital outputs (relay or triacs) can be

switched via L

 Different kinds of HVAC actuators are supported

(PWM, thermal, staged, floating, or analog actuators)

 Inputs / outputs can be freely assigned
 DIN rail (wiring cabinet / fuse box) mounting and wall-

mounting supported

 Different power supply variants available
 Optional terminal protection covers for wall mounting
 Optional swivel label holders for wiring information

ONWORKS

free

inputs

room

temp.

source

temp.

CO2
ppm

%

Excel 12

light #1 (corridor)
light #2 (corridor)
light #3 (window)

three-stage fan

sequence #1
sequence #2
sequence #3

MAX. / MIN. CONTROL LIMIT

VALV E

POSITION

T

END

AIR-QUALITY CONTROL LIMIT

DAMPER

POSITION

CO2

START

Fig. 1. Functional overview

T

START

CO2

range of

range of

END

operation

operation

SOURCE

TEMP.

CO2
PPM

free

outputs

thermal, floating,

0...10V, PWM, or
staged actuators

12

9 3

6

C

C

GENERAL

The Excel 12 FCU + Light application is LONMARK® certified,
and can thus be used in all open L

Excel 12 supports the following LONMARK® objects:

 one Node Object (LONMARK® object #0)
 one Space Comfort Controller Fan Coil Object (profile

#8501)

 three Lamp Actuator Objects (profile #3040)
 one Occupancy Sensor Object (profile #1060)
 two Open Loop Actuator Objects (L

A variety of hardware models with different power supplies
are available. Page 7 provides a detailed overview of the
available models.

Select the model fitting your particular needs.
The application can be downloaded into the Excel 12's

FLASH memory.
Honeywell's LNS™ plug-in allows you to configure the

application to match your specific requirements (e.g.
configure the heating / cooling sequences, the light
functionality and usage of otherwise unused inputs for
monitoring according to your needs).

The Excel 12 controller is designed for maintained zones.

ONWORKS® environments.

ONMARK® object #3)

® U.S. Registered Trademark
Copyright © 2010 Honeywell Inc. • All Rights Reserved EN0B-0470GE51 R0110

EXCEL 12: FCU + LIGHT

A

APPLICATION

The Excel 12 Fan Coil Unit (FCU) + Light application supports
three HVAC sequences (HEAT, COOL, or CHANGEOVER)
with control limits, air-quality control, free inputs, free outputs,
and up to three lights.

The application is delivered together with the plug-in and must
be downloaded into the Excel 12 controller's flash memory
during start-up. The user can customize the application using
Honeywell's LNS™ plug-in with CARE or any LNS™ tool (e.g.
LonMaker for Windows™). Customizations can be saved /
reloaded for easy configuration of multiple devices.

Application Overview

HVAC Application:

 Three sequences configurable for HEAT, COOL, and

CHANGEOVER

 Support of thermal actuators, floating actuators, PWM,

0...10 Vdc, and staged output via triac outputs or relay
outputs

 3-stage fan via triac outputs or relay outputs
 Binary inputs for condensation, occupancy sensor,

window contact, etc.

 Up to two limits (any combination of temperature limits

and/or air-quality limits)

 Min./max. limits can be used to limit the sequence output

according to you requirements. The limits are valid only in
the occupancy mode.
The example below shows that a heating valve will be
opened as soon as the source temperature drops below
T

. T

Start

Start, TEnd

configured using the plug-in.

MAX. / MIN. CONTROL LIMIT

VALVE

POSITION

T

END

NOTE: The min./max. limits have a higher priority than the

normal control output.

 The air-quality can be controlled by opening a damper in

dependence on the CO2 level. The CO2 ramp is defined
by CO2
(entered using the plug-in).

Example:

 CO2
 CO2
 range of operation = 50%

The damper starts opening as soon as the level of 1000 ppm
is reached. The maximum value (range of operation) is
reached at position CO2

START

START

= 2000 ppm

END

and the range of operation can be

range of

operation

SOURCE

T

START

Fig. 2. Minimum Heating Example

, CO2

, and the range of operation

END

= 1000 ppm

.

END

TEMP.

IR-QUALITY CONTROL LIMIT

range of

DAMPER

POSITION

CO2

START

CO2

Fig. 3. Air-quality control (example)

Example:

 sequence 1: heating via radiator
 sequence 2: cooling via damper
 setpoint: 20 °C
 CO2 control for sequence 2
 CO2
 CO2

= 1000 ppm

START

= 1500 ppm

END

 range of operation = 50%

1 2

1000

ROOM TEMP.

SEQUENCE 2

SEQUENCE 1

20 °C

CO2 LEVEL

1500 ppm

1000 ppm

100%

50%

0%

100%

0%

ppm

<1000

(1000 ppm, 1500 ppm)

ppm

<1000

(1000 ppm, 1500 ppm)

ppm

DAMPER

OPENS

Fig. 4. Example

1

Before

:

 CO2 level is OK → room temperature control, only
 Temperature at 20 °C

1

CO2 level rises above CO2

 CO2 level is too high, CO2 control starts with priority over

the temperature control

 Damper opens, room temperature drops
 Temperature drops to below 20 °C → heating sequence

starts heating

1500
ppm

>1500

>1500

START

ppm

ppm

operation

END

3

1500
ppm

(1000 ppm, 1500 ppm)

(1000 ppm, 1500 ppm)

DAMPER

CLOSES

:

4

1000
ppm

CO2
PPM

<1000

ppm

<1000

ppm

TIME

TIME

TIME

TIME

EN0B-0470GE51 R0110

2

EXCEL 12: FCU + LIGHT

2

CO2 level rises above CO2

END

:

 Damper reaches max. range of operation
 Heating sequence achieves room temperature of 20 °C

3

CO2 level drops below CO2

END

:

 Damper starts closing
 Room temperature is maintained at setpoint value

4

CO2 level drops below CO2

 CO2 level falls below CO2

T:

STAR

→ room temperature

START

control, only

 Temperature is maintained at 20 °C

NOTE: The temperature limitation and the air-quality control

have priority over the temperature control.

 Relative or absolute temperature setting via wall module.

Light Application:

 Three times ON / OFF switching dependent on:

 Occupancy
 Internal light level: The light will be switched ON if the

light level drops below the "dark level" and it will be
switched OFF if it increases above the "bright level”.
The "dark level" and the "bright level” can be
configured via the plug-in.

NOTE: Do not select the “Auto Off Delay Timer” checkbox

insofar as this functionality is currently not supported.

 Manual switching (via hardwired switches or

L

ONWORKS® wall module)

 Two times dimming / constant light control for two lights

with just one sensor.
Dimming / constant light control is performed via analog

outputs (this requires an HFD [High-Frequency Device] for
dimming with 1...10 Vdc input). An additional relay is
required to switch the light ON/OFF.

Constant light control helps to save additional energy.
Normally, fluorescent tubes lose about 15% of their
illumination over their lifecycle. To compensate for this,
rooms are therefore usually dimensioned with 15% more
illumination than actually necessary. With constant light
control, the light level needs to be only 85% in order to
achieve the required brightness. Further savings and
comfort can be achieved if there is a constant light level in
the room and the light is automatically dimmed when more
outside light enters. The Excel 12 supports window
correction in order to reduce the light output of the window
light. This functionality can be configured via the plug-in.

 Grouping of lights, e.g. switch three lights via a single

pushbutton.

 Soft ON/OFF switching for dimmable lamps.
 Light sensor: The light intensities typically encountered in

everyday life are listed in Table 1, while Table 2 presents
the recommended light levels in various environments as
set forth by DIN5035.

NOTE: One lux is equivalent to 0.0929 foot-candle.

Refer also to the plug-in help information for details.

Table 1. Typical light intensities

ambient conditions intensity (lux)

summer day, cloudless 100,000
summer day, cloudy 20,000
winter day, cloudy 400
night, with full moon 0.3

Table 2. Recommended light intensities (DIN5035)

area intensity (lux)

storage rooms 50...200
washrooms, cloakrooms, technical

rooms, corridors

100

office rooms (near windows) 300
office rooms (minimal outside light) 500
open-plan office rooms 750
schools (daytime) 300
night schools 500
gymnasiums 200
show rooms 300
commercial kitchens 500

NOTE: The intensity level depends on the sensor type and

the mounting location.

NOTE: The indoor light sensor must be suitable for sensing

artificial light, and should be mounted more towards
the corridor.

Free Inputs for Monitoring:

 Unused inputs can be used for monitoring. This

application supports the following free inputs:

 one temperature input (NTC20k)
 one percentage input (0..10 V or 2..10 V)
 three binary inputs

 The input values are communicated via nvoXL12Status.

Free Binary Outputs Can Be Switched Via L

ONWORKS:

 Up to two unused digital outputs (triac or relay outputs)

may be switched via L

ONWORKS® (nviFreeOutput[0/1]).

Occupancy Modes:

 Occupied mode: The Excel 12 operates according to the

"occupied" heating and cooling set-points.

 Bypass: After the bypass button of a hardwired wall

module has been pressed or when corresponding data is
received via the L

ONWORKS® network, the Excel 12

operates temporarily according to the "occupied" heating
and cooling set-points. When the bypass time has
elapsed, the controller reverts to scheduled mode. The
bypass time can be configured via plug-in.

 Standby mode: The Excel 12 operates according to the

"standby" heating and cooling set-points.

 Unoccupied mode: The Excel 12 operates according to

the "unoccupied" heating and cooling set-points.

3 EN0B-0470GE51 R0110