Technical Specifications; Tec26X7-2 Series Bacnet Ms/Tp Networked Thermostats With Two Outputs (Part 1 Of 2) - Johnson Controls TEC2627-2 Installation Instructions And Operators Manual

Table 7: Troubleshooting Details
Symptom Probable Causes
Thermostat Will See the probable causes listed in the Multiple Symptoms section earlier in this table.
Not Come Online
A thermostat may be connected to the wrong bus.
A baud rate may be specified in the new thermostat that is incompatible with the running network.
No device on the network is configured to use a specific baud rate (normally the NAE), but all devices
are set to use auto baud. At least one device, typically the bus supervisor (NAE), must have an
assigned baud rate. Set the baud rate in the bus supervisor and set all other devices to auto baud.
1. For common MS/TP troubleshooting information, refer to the MS/TP Communications Bus Technical Bulletin
(LIT-12011034).
Table 8: Display Messages
Display Function
Service Indicates that there is a service alarm in accordance with the programmable Binary Input (BI2).
Filter Indicates that the filter(s) is dirty in accordance with the programmable Binary Input (BI2).
Window Indicates that an outside window or door is open and has cancelled the thermostat heating or cooling
action in accordance with the programmable Binary Input (BI1).

Technical Specifications

TEC26x7-2 Series BACnet MS/TP Networked Thermostats with Two Outputs (Part 1 of 2)

Power Requirements
Relay/Triac On/Off and
Contact Floating
Rating Control
Analog Proportional
Output Rating Control
Auxiliary Triac Output
Output Rating
Digital Inputs
Temperature Sensor Type
Wire Size
MS/TP Network Guidelines
Temperature Backlit
Range Display
Heating
Control
Cooling
Control
Accuracy
Minimum Deadband
Ambient Operating
Conditions
Storage
24 TEC26x7-2 Series BACnet® MS/TP Networked Thermostats with Two Outputs Installation Instructions
1
(Part 2 of 2)
19 to 30 VAC, 50/60 Hz, 2 VA (Terminals 4 and 5) at 24 VAC Nominal, Class 2 or
Safety Extra-Low Voltage (SELV)
30 VAC, 1.0 A Maximum, 15 mA Minimum, 3.0 A In-Rush, Class 2 or SELV
0 to 10 VDC into 2k ohm Resistance (Minimum)
30 VAC, 1.0 A Maximum, 3.0 A In-Rush
Voltage-Free Contacts across Terminal Scom to Terminals BI1, BI2, or UI3
Local 10k ohm Negative Temperature Coefficient (NTC) Thermistor
18 AWG (1.0 mm Diameter) Maximum, 22 AWG (0.6 mm Diameter) Recommended
32 Devices Maximum; 4,000 ft (1,219 m) Maximum Cable Length
-40.0°F/-40.0°C to 122.0°F/50.0°C in 0.5° Increments
40.0°F/4.5°C to 90.0°F/32.0°C
54.0°F/12.0°C to 100.0°F/38.0°C
±0.9F°/±0.5C° at 70.0°F/21.0°C Typical Calibrated
2F°/1C° between Heating and Cooling
32 to 122°F (0 to 50°C); 95% RH Maximum, Noncondensing
-22 to 122°F (-30 to 50°C); 95% RH Maximum, Noncondensing