Johnson Controls METASYS TC-9102 Series Manual de servicio

System 91 Manual

TC-9102

Technical Bulletin

Issue Date 0698

Order No. MN-9100-2117

Introduction Page 3

•

Model Types 4

•

Controller Functions 5

•

Output Types 10

•

Fan Output Types 12

Installation 15

•

Mounting 15

•

Wiring 16

•

Jumper and Switch Selections 22

•

Startup 23

•

Commissioning 23

Specifications & Technical Data 25

•

Factory-Set Parameters 26

•

Parameters for Supervisory System 27

•

Ordering Codes 28

TC-9102 Fan Coil Unit Controller

2 Technical Bulletin—TC-9102

Technical Bulletin—TC-9102 3

Introduction

The TC-9102 series of microprocessor-based controllers is designed for

the control of Fan Coil Units (FCUs) with heating and cooling, and a

single-speed, 3-speed or variable-speed fan. The controller can regulate

water valves, one or 2-stage electric heating, or a cooling unit where the

compressor has its own short cycle protection.

The comfort temperature set point of the controller may be adjusted via a

TM-9100 Series Room Command Module, and the occupied and

unoccupied control modes of operation temporarily changed. A window

open sensing contact may be connected to switch the controller to the off

mode, and a low temperature limit protection feature is available.

The controller is factory-configured to control with default operating

parameters so that no external setup devices are necessary. However, a

software package for a PC is available to verify the correct operation of

the controller and to modify the configuration, if necessary.

Winter and summer compensation may be enabled when the controller

receives outdoor air temperature data via the communications bus, and

modes of operation may be set by time scheduling programs or control

processes in the supervisory system.

2357 2664

Figure 1: TC-9102 Controller Figure 2: TM-9160 Room

Command Module

4 Technical Bulletin—TC-9102

2333

Figure 3: TM-9180 Room Command Module

The TC-9102 Controller is available in several model types according to

the type of outputs and the range of the integrated or remote set point

input. Refer to Ordering Codes at the end of this bulletin for details.

Model Types

Technical Bulletin—TC-9102 5

The controller can be connected to a Room Command Module, from

which it receives the room temperature, the remote set point and other

override signals. The TM-9180 intelligent Room Command Module

provides these signals via a serial bus connection to the controller. The

other Room Command Modules (TM-9150/9160/9170) provide the

signals as individually connected physical inputs to the controller. In

addition, an NTC temperature sensor is available for mounting within the

FCU.

For installations without a Room Command Module, the controller is

available with an integrated set point adjuster. Alternatively, the remote

set point and fan override controls may be incorporated into a custom

FCU control panel. Refer to the Specifications and Technical Data

section of this bulletin for details of the components required.

Occupancy Sensor

Window Contact

Room Temp.*

Remote Setpoint

Occupancy Button

Fan Override

(3-speed only)

Output Heating

Output Cooling

Fan Control

Controller

Room

Command

Module

Communications Bus

(Supervisory Control,

Outdoor Air Temp.) NTC sensor may be

mounted in FCU.

tc2cwrcm

Figure 4: Controller with Room Command Module

Occupancy Sensor

Window Contact

Room Temp.

NTC Sensor

Fan Override

(3-speed only)

Output Heating

Output Cooling

Fan Control

Controller

(Setpoint)

Communications Bus

(Supervisory Control,

Outdoor Air Temp.)

tc2cwspa

Figure 5: Controller with Integrated Setpoint Adjuster

Controller

Functions

6 Technical Bulletin—TC-9102

The controller operates in standalone mode when it is not connected to a

supervisory system via the communications bus nor to a TM-9180 Room

Command Module. In standalone mode the controller may operate in one

of three control modes:

•COMFORT (occupied): control at comfort set point

•STANDBY (unoccupied): control at a standby level set point

•OFF (not in use): low limit control only

The control modes are set by the window contact and occupancy sensor

inputs, and may be modified by the occupancy button on the Room

Command Module as shown in Table 1.

Table 1: Standalone Modes

WINDOW CONTACT OCCUPANCY SENSOR CONTROL MODE ALTERNATE MODE

(OCCUPANCY BUTTON)

WINDOW OPEN NO ACTION OFF NO ACTION

WINDOW CLOSED OCCUPIED COMFORT STANDBY

UNOCCUPIED STANDBY COMFORT

When connected to a supervisory system via the communications bus or

to a TM-9180 Room Command Module, the controller may operate in

COMFORT, STANDBY or OFF control modes, and additionally in

NIGHT mode:

NIGHT (scheduled unoccupied): control at a night level set point.

The control modes are set by the supervisory system or TM-9180, and are

modified by the occupancy sensor input and occupancy button on the

Room Command Module as shown in Table 2. The window contact input

always switches the controller to OFF control mode, and a MANUAL

mode is available from the supervisory system to inhibit the action of the

occupancy sensor and occupancy button.

Table 2: Supervisory Modes

WINDOW

CONTACT SUPERVISORY

MODE OCCUPANCY

SENSOR CONTROL MODE ALTERNATE MODE

(OCCUPANCY BUTTON)

OPEN ANY MODE NO ACTION OFF NO ACTION

OFF OCCUPIED OFF OFF

UNOCCUPIED OFF OFF

NIGHT OCCUPIED NIGHT COMFORT (T)*

UNOCCUPIED NIGHT COMFORT (T)*

STANDBY OCCUPIED STANDBY COMFORT

CLOSED UNOCCUPIED STANDBY COMFORT (T)*

COMFORT OCCUPIED COMFORT STANDBY

UNOCCUPIED STANDBY COMFORT

OFF/MANUAL OFF

NIGHT/MANUAL NO ACTION NIGHT NO ACTION

STANDBY/MANUAL STANDBY

COMFORT/MANUAL COMFORT

*(T) = Timed (Returns to Control Mode after 1 hour.)

Standalone

Mode

Supervisory

Mode

Technical Bulletin—TC-9102 7

The set point in all control modes may be modified from the integrated

set point adjuster or from the remote set point dial/control panel on the

Room Command Module, according to the controller model type. The

controller models with a remote set point of 12-28°C require that a Room

Command Module or an external potentiometer is connected to give the

set point. Controllers with a remote set point of +/-3 K have internal

factory set points of 20°C for heating and 22°C for cooling.

The set point is decreased or increased in the STANDBY control mode

by the factory-set “Standby Bias Heating” and “Standby Bias Cooling”

values to reduce the heating or cooling energy required when the room is

temporarily unoccupied.

When a supervisory system is connected, the set point can be further

decreased or increased in the NIGHT control mode to further reduce

energy requirements during scheduled unoccupied periods such as nights,

weekends and holidays.

In the controller there are two “comfort” set points (Comfort Set Point

Heating and Comfort Set Point Cooling), and the difference between

these two values determines the zero energy band where neither heating

nor cooling is required. The controller calculates two working set points

(WSP Heating and WSP Cooling), which are the sum of the comfort set

point values, the “Remote Set Point” value coming from the integrated

set point adjuster or the Room Command Module, and the “Common Set

Point” value. In the supervisory mode an adjustment may be made to the

working set points either by changing the “Comfort Set Points,” or by

changing the value in the “Common Set Point” parameter of the

controller which enables the supervisory system operator to adjust the

setpoints for heating and cooling at the same time without affecting the

zero energy band. In summary:

Working Set Point (Heating) = Comfort Set Point (Heating) (Supervisory System)

+ Remote Set Point (integrated adjuster or Command Module dial)

+ Common Set Point (Supervisory System)

+ STANDBY or NIGHT Bias Heating (if mode is active)

Working Set Point (Cooling) = Comfort Set Point (Cooling) (Supervisory System)

+ Remote Set Point (integrated adjuster or Command Module dial)

+ Common Set Point (Supervisory System)

+ STANDBY or NIGHT Bias Cooling (if mode is active)

When the room temperature is below the working set point for heating,

the heating output increases according to the proportional band and

integral time parameters set for the heating control loop. When the room

temperature is above the working set point for cooling, the cooling output

increases according to the proportional band and integral time parameters

set for the cooling control loop. Heating and cooling control is illustrated

in figures 8 and 9.

Controller Set

Points

8 Technical Bulletin—TC-9102

When pressed for about one second, the occupancy button on the Room

Command Module changes the mode of operation of the controller to the

“Alternate Mode” or back to the normal “Control Mode” as shown in

Table 2. The “COMFORT (T)” alternate mode is active only for a period

of one hour, after which the controller reverts to the normal control

mode.

The controllers with on/off fan control switch the fan on when the room

temperature is below the working set point for heating and above the

working set point for cooling, and switch the fan off when the room

temperature has entered the zero energy band by the value set for the fan

differential. The fan can optionally be set to continue running in the zero

energy band in the COMFORT (occupied) mode, using the software

commissioning tool.

In controllers with 3-speed fan control outputs, the fan stages are

switched in sequence as the room temperature decreases or increases, and

Speed 1 remains on in the zero energy band.

In controllers with a 0 to 10 VDC output for a fan speed controller, the

output increases as the room temperature falls below the working set

point for heating or rises above the working set point for cooling, and

maintains a minimum output (set by default at 50%) when the room

temperature has entered the zero energy band.

For all controllers, in OFF mode the fan is switched off and the heating

and cooling outputs are set to the fully closed or off level. Fan control

sequences are shown in figures 10, 11 and 12.

3-Speed Fan Override

The speed of a 3-speed fan may be set manually from the Room

Command Module when the controller is in COMFORT (occupied)

mode. In the “AUTO” position the speed is set by the controller

according to the room temperature. In the manual “OFF-1-2-3” positions

the fan runs at the selected speed. The fan override is not active in

STANDBY, NIGHT or OFF modes.

In controller models with 2-stage on/off heating and cooling outputs, all

outputs are switched off when the fan speed is set to “OFF” to protect

electrical heating and cooling devices that require a minimum air flow for

normal operation. This feature can be enabled for other types of outputs,

if required, using the software commissioning tool. Refer to

Commissioning later in this document.

Low Limit Mode

The low limit mode is active when the room temperature falls below the

low limit set point. The fan is switched on at full speed and the heating

output is set to the maximum level until the room temperature rises by the

low limit differential value.

Alternate Mode

Fan Control

Technical Bulletin—TC-9102 9

When the controller is connected to a supervisory system, the winter

and/or summer compensation modes may be enabled. The supervisory

system must be programmed to set the outdoor air temperature via the

communications bus on a periodic basis. After a power interruption the

winter and summer compensation modes are temporarily disabled until a

new outdoor air temperature value is received. When the outdoor

temperature falls below the winter set point, the working set point of the

controller will be raised or lowered in accordance with the winter

authority slope. When the outdoor temperature rises above the summer

set point the working set point of the controller will be raised in

accordance with the summer authority slope. The maximum amount of

compensation is limited by the Winter Authority Limit and the Summer

Authority Limit.

The effect of the winter and summer compensation on the controller set

point is shown below.

-5

-4

-3

-2

-10

-20-30

-1 10 20

40 50

Winter Authority Slope

(+0,1)

Winter Authority

Limit (-3 K))

Winter

Setpoint

(10°C)

Summer

Setpoint

(24°C)

Summer Authority Limit

(+5 K)

Summer Authority

Slope (+0,2)

Setpoint

Compensation

(K)

Outdoor Air

Temperature

(°C)

Winter Authority

Slope (-0,1)

tc2winsu.drw

Figure 6: Winter/Summer Compensation

Winter/Summer

Compensation

10 Technical Bulletin—TC-9102

When the controller is connected to a remote N2 Bus and supervised by a

Metasys N2 Dialer (NU-NDM101-0) which is linked to a Metasys

network by a telephone line, the following alarm conditions in the

controller will initiate the automatic dial feature:

•Window Open

•Low Limit mode

•High or low alarm limit violation of the room temperature when alarm

limits have been set by the supervisory system.

When any one of these alarm conditions occurs, the N2 Dialer will detect

the alarm and connect the remote N2 Bus to the Metasys network. When

the telephone line connection is established the controller alarm status

will automatically be reset and the controller is then ready to report

further alarm conditions as they occur. Refer to the Technical Bulletin of

the NU-NDM101-0 for further information.

The heating and cooling outputs are one of the following types,

depending on the controller model code:

The output is an analog voltage between 0 and 10 VDC in direct

proportion to the controller output from 0 to 100%.

The DAT output is a triac which is switched on for a duration within the

set heating or cooling valve cycle time in direct proportion to the

controller output from 0 to 100%. To avoid unnecessary switching of the

valve actuator when the output is between 0 and 5% the triac remains off,

and when the output is between 95 and 100% the triac remains on. The

default cycle time is 300 seconds.

OFF

ON 50% Output 30% Output

DAT C

cle Time

DAT C

cle Time

Figure 7: DAT Output

Auto-dial

Feature

Output Types

0 - 10 VDC

DAT - Duration

Adjust Type

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