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TEC2664Z-3 BACnet® MS/TP Rooftop Controller for Stand-Alone and Networked Zoning Systems 
Installation Instructions 

13

Sequence of Operation

The sequence of operation of the zones is commanded 
from the TEC2664Z-3 Rooftop Controller on a Change 
of Value (COV) basis. The rooftop controller transmits 
its current sequence mode to the zones, depending on 
the highest or highest average PI demand. The 
available sequence values at the zones are heating 
and cooling. There is a 2-minute delay when toggling 
between the heating and cooling modes. This delay 
only applies when the system is switching over from 
the network demand. The delay is not active when 
working with the 

Comm Lost

 parameter using the 

return air temperature sensor or the room air 
temperature sensor. If the system mode of the rooftop 
controller is set to off, the sequence value at the zone 
is cooling by default.

Note:

If no return air sensor is installed and loss of 

communication occurs, control of the rooftop unit is 
based on the onboard sensor readings of the rooftop 
controller.

The user can choose between a single highest 
PI demand, an average of the three highest 
PI demands, or an average of the five highest 
PI demands.

Using the five highest PI demands as an example, five 
buffers are required in the BACnet module of the 
rooftop controller for the PI heating demand, and five 
additional buffers are required for the PI cooling 
demand. Each time a new zone sends its PI cooling 
demand, the rooftop controller compares it to the 
lowest of the five values already stored and buffers it (if 
required). The rooftop controller averages these five 
values, and the PI heating demand or PI cooling 
demand controls the rooftop controller.

See Figure 8 through Figure 18 for sequence of 
operation examples.                                

Figure 8: Rooftop Controller Sequence of Operation for

Two-Stage Heating and Two-Stage Cooling

FI

G

:t

w

_s

tg

_ht

ng

_t

w

_

st

g

_

cl

g

PI Demand (Depends on Control Type Selected)

Increase Heating

Stage 2

Start/Stop

(Approx.)

Stage 1

Start/Stop

(Approx.)

Stage 1

Start/Stop

(Approx.)

100%

PI Demand

PI Demand (Depends on Control Type Selected)

Increase Cooling

Stage

1

Stage

2

Stage

1

Stage

2

Stage 2

Start/Stop

(Approx.)

0%

PI Demand

100%

PI Demand

Содержание TEC2664Z-3 BACnet

Страница 1: ...IMPORTANT The TEC2664Z 3 Rooftop Controller is intended to provide an input to equipment under normal operating conditions Where failure or malfunction of the rooftop controller could lead to personal injury or property damage to the controlled equipment or other property additional precautions must be designed into the control system Incorporate and maintain other devices such as supervisory or a...

Страница 2: ...er condensation other liquids or corrosive or flammable vapors of any kind Mount the rooftop controller in an accessible location to allow for easy access to the user interface keys Do not mount the rooftop controller on surfaces that are prone to vibration or in areas where electromagnetic emissions inductive interference or radio frequency signals from other devices or wiring can interfere with ...

Страница 3: ...f you need to install the rooftop controller on an electrical junction box use 2 1 2 x 4 in 63 x 101 mm square boxes with mud ring covers and avoid smaller 1 1 2 x 4 in 38 x 101 mm square or 3 x 2 in 76 x 51 mm boxes This procedure ensures you have enough space for cabling and end of line devices if needed Note For surface mount applications use durable mounting hardware such as Molly bolt anchors...

Страница 4: ...e making electrical connections to avoid electric shock CAUTION Risk of Property Damage Do not apply power to the system before checking all wiring connections Short circuited or improperly connected wires may result in permanent damage to the equipment IMPORTANT Make all wiring connections in accordance with local national and regional regulations Do not exceed the electrical ratings of the TEC26...

Страница 5: ...s RC and RH RH W1 W2 AU Aux DI1 SP Auxiliary Contact for Lighting On Off Actuation Exhaust Fan BPD 0 to 5 VDC Heating Stage II G Fan Output Scom RS OS Outside Air Sensor Discharge Air Sensor Remote Inputs Return Air Sensor Cooling Stage II Cooling Stage I Heating Stage I REF MS TP Connector RH W1 W2 Three Pole Right Top Connector 6 7 8 SP DI1 RS Scom Eight Pole Bottom Connector OS DS AU BPD 9 10 1...

Страница 6: ...end of line terminator is required if a supervisory controller is not at the end of the segment If a supervisory controller is at the end of the segment then the end of line terminator switch on the supervisory controller must be set in the ON position Note See Table 6 for end of line terminator ordering information For applications with a supervisory controller on the MS TP Bus set the supervisor...

Страница 7: ... See Main User Menu on page 8 access the Installer Configuration Menu or to exit the menu See Configuring the TEC2664Z 3 Rooftop Controller on page 8 Use the UP DOWN arrow keys to change the configuration parameters and to activate a setpoint adjustment Light Emitting Diodes LEDs Three LEDs are included to indicate the fan status and to show a call for heating or a call for cooling The LED is on w...

Страница 8: ...parameter displays use the YES key to choose the desired selection option 4 Press the YES key and then the NO key to continue scrolling through the parameters When the rooftop controller is in the Installer Configuration Menu and left unattended for approximately 8 seconds the rooftop controller reverts to the Auto Scroll Display Refer to the TEC Zoning Control System for Stand Alone and BACnet MS...

Страница 9: ...e three highest PI Heating or Cooling demands controls the rooftop controller AV_H5 The average of the five highest PI Heating or Cooling demands controls the rooftop controller Dis HL4 Sets the Discharge Air High Limit temperature value at which the heating stages are locked Default 120 0 F 49 0 C Range 70 0 F 21 0 C to 150 0 F 65 5 C Dis LL4 Sets the Discharge Air Low Limit temperature value at ...

Страница 10: ...r Service A Service alarm is displayed on the rooftop controller when the input is energized This input can be tied into the air conditioning unit control card which provides an alarm should there be a malfunction TOccTime Sets the duration of the Temporary Occupancy Time when the heating or cooling setpoints in the Occupied mode are established by an Override Function enabled in the Main User Men...

Страница 11: ...ct open Occupied contact closed Unoccupied n o Contact closed Occupied contact open Unoccupied Note The contact toggles with the internal Occupied Unoccupied schedule or the remote NSB contact if DI1 is used Prog rec Enables Progressive recovery Default off Note Progressive recovery is automatically disabled if DI1 is configured for remote NSB on Progressive recovery enabled Note The programmed Oc...

Страница 12: ...500 Pa 1 RTC MAC is the unique device address of the rooftop controller from 004 to 127 on the MS TP network 2 Local Unocc Override appears only when in the Unoccupied mode 3 When adjusting the numeric value press the UP or DOWN arrow key to change the value by single increments press and hold the UP or DOWN arrow key to change the numeric value in increments of ten 4 When adjusting the temperatur...

Страница 13: ... the onboard sensor readings of the rooftop controller The user can choose between a single highest PI demand an average of the three highest PI demands or an average of the five highest PI demands Using the five highest PI demands as an example five buffers are required in the BACnet module of the rooftop controller for the PI heating demand and five additional buffers are required for the PI coo...

Страница 14: ... Cooling Setpoint Heating Setpoint AO1 FIG cntrl_crv_1 Figure 10 Zone Controller Set for No Reheat AO2 0 VDC and BO5 Off Rooftop Controller in Heating Mode Cooling Setpoint Heating Setpoint AO1 FIG cntrl_crv_2 Figure 11 Zone Controller Set for Analog Duct Reheat Only BO5 Off Rooftop Controller in Cooling Mode Cooling Setpoint If AO2 stage is locked then AO1 minimum position Heating Setpoint AO1 AO...

Страница 15: ...troller Set for Analog Duct Reheat Only BO5 Off Rooftop Controller in Heating Mode Cooling Setpoint Heating Setpoint AO1 AO2 FIG cntrl_crv_4 Figure 13 Zone Controller Set for On Off Duct Reheat Only AO2 0 and On Off Reheat Time Base 10 Seconds Rooftop Controller in Cooling Mode Cooling Setpoint Heating Setpoint A01 B05 FIG cntrl_crv_5 ...

Страница 16: ...troller Set for On Off Duct Reheat Only AO2 0 and On Off Reheat Time Base 15 Minutes Rooftop Controller in Cooling Mode Cooling Setpoint Heating Setpoint AO1 B05 FIG cntrl_crv_6 Cooling Setpoint Heating Setpoint AO1 B05 FIG cntrl_crv_7 Figure 15 Zone Controller Set for On Off Duct Reheat Only AO2 Off Rooftop Controller in Heating Mode ...

Страница 17: ...ontroller Set for On Off Peripheral Reheat Only AO2 0 Rooftop Controller in Cooling Mode Cooling Setpoint Heating Setpoint AO1 B05 AO1 FIG cntrl_crv_8 Figure 17 Zone Controller Set for Terminal Reheat on AO2 and Peripheral Heating on BO5 Rooftop Controller in Cooling Mode Cooling Setpoint Heating Setpoint AO1 AO2 B05 FIG cntrl_crv_9 ...

Страница 18: ...nd Alone and Networked Zoning Systems Installation Instructions 18 Figure 18 Zone Controller Set for Terminal Reheat on AO2 and Peripheral Heating on BO5 Rooftop Controller in Heating Mode Cooling Setpoint Heating Setpoint AO1 AO2 B05 FIG cntrl_crv_10 ...

Страница 19: ... 3 Rooftop Controller See Rooftop Controller User Interface Keys on page 7 for a description of the five user interface keys Figure 19 shows a flow chart of the Main User Menu The system mode can be set to either Off or Auto The Auto mode allows the rooftop controller to determine from the average PI demand if a network is detected or from the return air sensor PI demands if a network is not detec...

Страница 20: ...wer failure of more than 6 hours DAS Alrm This alarm indicates a high or low alarm at the discharge air sensor If no discharge air sensor is connected 40 0 F 40 0 C reading the associated functions such as lockouts and alarms are disabled If the discharge air sensor is shorted 122 0 F 50 0 C reading the associated functions such as lockouts and alarms are enabled Service This alarm indicates there...

Страница 21: ... F or C Pressure x x W C or Pa Zone Seq Cool Zone Seq Heat Effective PI Heat Demand at the Rooftop Unit Effective PI Cool Demand at the Rooftop Unit Highest PI Heat Demand Zone Address Highest PI Cool Demand Zone Address Heat Out xxx Cool Out xxx Heat MAC xxx Cool MAC xxx 1 The outdoor temperature displays only if an outside air temperature sensor is installed If an outside air temperature sensor ...

Страница 22: ...tion Figure 20 Heating Cooling Stages Handling FIG htng_clng Figure 21 Bypass Damper Sequence Start G Fan Output On Bypass Damper Output Based on Static Pressure Input No Yes Bypass Damper Loop Disabled Bypass Damper Position 100 Forced Open 10 VDC Exit Exit FIG byps_dmpr Figure 22 System Mode and Fan Operation FIG systm_mde_fn_oprtn ...

Страница 23: ...ions 23 Figure 23 Zone Sequence Selection System Mode Off Zone Sequence Cool Avg PI Heating Demand Avg PI Cooling Demand Zone Sequence Heat NO NO Avg PI Cooling Demand Avg PI Heating Demand Zone Sequence Cool NO Avg PI Cooling Demand Avg PI Heating Demand Zone Sequence Stays in Existing Mode FIG zn_sqnc_slctn ...

Страница 24: ...rol TEC2664Z 3 Rooftop Controller for Control of Up to Two Stages of Heating and Two Stages of Cooling in Rooftop Proportional Bypass Damper Fan and Zone Demand Strategies Table 6 Accessories Order Separately Code Number Description SEN 600 1 Remote Inside Air Temperature Sensor TE 6361M 11 Duct Mount Air Temperature Sensor Metal Enclosure TE 6363P 11 2 Outside Air Temperature Sensor Plastic Enclo...

Страница 25: ...lines 32 Devices Maximum 4 000 ft 1 219 m Maximum Cable Length Temperature Range Backlit Display 40 0 F 40 0 C to 122 0 F 50 0 C in 0 5 Increments Heating Control 40 0 F 4 5 C to 90 0 F 32 0 C Cooling Control 54 0 F 12 0 C to 100 0 F 37 5 C Accuracy 0 9F 0 5C at 70 0 F 21 0 C Typical Calibrated Minimum Deadband 2F 1C between Heating and Cooling Ambient Conditions Operating 32 to 122 F 0 to 50 C 95...

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