Network Thermostat TEC-N2 Series User manual

1
www.networkthermostats.com
Note: In this document, Building Automation System (BAS) is a generic
term that refers to the Metasys® Network (Network Control
Module [NCM] or N30 series), Companion™, and Facilitator™
supervisory systems. The specific system names are used when
referring to system specific applications.
The TEC-N2 series includes two nonprogrammable models: multi stage
heat pump (HP32-N2) and multi stage gas/electric (GE22-N2). The appli-
cations include furnace, air conditioner, heat pump, and rooftop units.
The TEC-N2 incorporates fuzzy logic for precise control in a thermostat
type package.
All TEC-N2s have Metasys N2 communication capability. This communi-
cation allows the user to view and adjust parameters from a remote work-
station. It also provides information, such as outside air temperature, to the
TEC-N2 units on the bus. The thermostat is easy to operate and normally
displays room temperature and mode of operation using cooling (j) or
heating (i) icons. When there is a call for cooling, the snowflake icon (j)
blinks. Likewise, on a call for heating, the flame icon (i) blinks. When the
temperature is satisfied, neither will blink. In the auto mode, both icons
(ji) display continuously when satisfied. Light-emitting diodes (LEDs)
on the top of both models use binary inputs (BIs) to indicate a clogged fil-
ter and external service. A unique temperature alarm (BI 2) indicates that
the zone temperature has not been satisfied in 45 minutes.
IInnttrroodduuccttiioonn
DDeessccrriippttiioonn
TEC-N2 Series Thermostat
Used to display outside
temperature (optional).
LEDs indicate system activity
or problems (see Table 3).
Used to select heating, cooling,
auto, off, or emergency heat
(E ht; available on HP32-N2
only) mode of operation.
Used to run fan
continuously.
Used to alternate between
day and night setpoints.
Time occuppied mode when
keyboard locked.
Used to increase/decrease values
or change between °C or °F.
Outdoor
Day/Night
Mode
Fan
}
75
Figure 1: TEC-N2
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2TEC-N2 Series Thermostat
Table 1: Specifications
Product HP32-N2 Thermostat with N2 Bus, 3 Heat/2 Cool Heat Pump
GE22-N2 Thermostat with N2 Bus, 2 Heat/2 Cool
Compatibility GE22-N2 TEC1101-1 (Johnson Controls)
TEC1103-1 (Johnson Controls)
HP32-N2 TEC1102-1 (Johnson Controls)
Power Requirements 20-30 VAC, 50-60 Hz, Class 2, 24 VAC nominal, 2.4 VA maximum not including
driven loads
Relay Contact Rating Maximum Inductive: 1 ampere with surges to 3 amperes, 24 VAC Class 2
Maximum Resistive: 1 ampere, 24 VDC (2000 VA maximum for all outputs)
Minimum: 10 mA for 24 VAC circuit; 10 mA for a 24 VDC circuit
Binary Inputs 20-30 VAC or 22-30 VDC (Negative on 24V [C] terminal). Switches at 2 VDC.
(LED 1, LED 2, CLK1)
Recommended Wire Size 18 gauge at 100 feet/22 gauge at 20 feet
Thermostat 28° to 124°F (0° to 48°C)
Measurement Range
Outdoor Air -50° to 124°F (-48° to 48°C)
Temperature Indication
Range
Control Range Heating: 38° to 88°F in 1° increments (5° to 30°C in 1° increments)
Cooling: 60° to 88°F in 1° increments 16° to 40°C in 1° increments)
Display Resolution 1°F (1°C)
Minimum Deadband 1°F (2°C) between heating and cooling
°C/°F Conversion 20°C = 68°F, each Celsius degree above or below 20°C is 2°F
N2 Communications Isolated bi-directional, RS-485, 9600 baud
Ambient Operating 32° to 131°F (0° to 55°C); 5% to 90% RH noncondensing
Conditions
Ambient Storage -30° to 131°F (-34° to 55°C)
Temperatures
Dimensions (H x W x D) 4-1/2 x 4 x 7/8 in. (114.3 x 101.6 x 22.2 mm)
Shipping Weight 0.37 lb (0.171 kg)
UL and cUL Listing UL 873 Multiple Class 2 Device, UL94HB Plastic Enclosure
CE Compliance CISPR 22, Residential Class B, CE Directive (89/336/EEC, EN50081/1,
EN50082/2) Industrial and Residential
FCC Compliance This equipment has been tested and found to comply with the limits for a Class
A digital device and verified to Class B pursuant to Part 15 of FCC Rules. These
limits are designed to provide reasonable protection against harmful interference
when this 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 required to
correct the interference at his/her own expense.
This device complies with Class A Part 15 of the FCC rules. It was also verified to Class B. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause undesired operation.
This Class A digital apparatus meets all of the requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numerique de
la classe A respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada.

TEC-N2 Series Thermostat 3
Table 2: TEC-N2 Series Accessory Ordering Information
Item Product Code Number
Optional Accessories (includes mounting hardware)
Remote or Averaging Indoor Temperature Sensor with Communication Module NT-IDS
Outdoor Air Sensor with Outdoor Air Temperature Communication Module NT-ODT
Duct Mounted Supply Air Sensor with Outdoor Air Temperature
Communication Module
NT-DSCHG
Duct Mounted Return Air Sensor with Indoor Remote Temperature
Communication Module
NT-DUCT
Table 3: Alarm Indicators (AP32-N2 Heat Pump and GE22-N2 Multistage)
LED Position Function BI
Right ( )Indicates a fault. Controlled by external switch on LED 2, which displays a
wrench icon and reports Change-of-State (COS) to the Metasys system and
causes the Network Dial Modem (NDM) to dial out.
1
Center
(no symbol)
(HP32-N2 heat pump only.) Indicates when emergency (auxiliary) heat
(E ht) is activated. Internally controlled. No COS.
N/A
Left ( ) Indicates filter needs to be changed. Controlled by external switch on LED 1,
which displays the filter icon and reports a COS to the Metasys system and
causes the NDM to dial out.
3
Temperature
Alarm (no LED)
If the room temperature is more than 1°F (1°C) away from the setpoint after
45 minutes of operation, a COS will occur which causes the NDM to dial out.
Once the temperature reaches the setpoint, the alarm returns to normal.
2
Note: Either binary input (LED 1 or LED 2) can be used as a fan proving switch for other applications.
Table 4: Applications
Application Recommended Model
Fan Coil Unit GE22-N2
Heat Pump HP32-N2
Packaged Heating/Cooling GE22-N2
Unit Heaters GE22-N2
Packaged Rooftop GE22-N2

4TEC-N2 Series Thermostat
The tools needed to install the TEC-N2 series thermostat are:
• drill
• 3/16 in. drill bit
• 1/8 in. and 1/4 in. flat-blade screwdrivers
• hammer
• marking pencil
• wire stripper
Note: Two plastic anchors with screws and the cover lock are included
with the TEC-N2s.
Note: Mount the TEC-N2 series thermostat on an interior wall, approxi-
mately 1.5 m (5 ft) above the floor in a location of average tem-
perature (e.g., 72°F). Do not mount the thermostat on outside
walls or behind doors. Be sure to install the thermostat away from
direct sunlight or radiant heat, air discharge grilles, stairwells, or
outside doors. Keep the thermostat away from steam or water
pipes, warm air stacks, areas with no airflow, or sources of electri-
cal interference.
To mount:
1. Lift the thermostat cover and insert a small coin into the slot located
in the bottom center of the thermostat case.
2. Twist 1/4 turn (Figure 2).
3. Grasp the base from the bottom two corners, and separate from the
thermostat.
4. Swing the thermostat out from the bottom, and lift up and out from
the base.
Note: When replacing an existing thermostat, use wire tags to identify
terminal designations.
IInnssttaallllaattiioonn
Required
Installation Tools
MMoouunnttiinnggtthhee
TTEECC--NN22SSeerriieess
TThheerrmmoossttaatt
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Figure 2: Separating and Mounting the TEC-N2

TEC-N2 Series Thermostat 5
5. Place the rectangular opening in the base over the equipment control
wires.
6. Use the base as a template, and mark the location of two mounting
holes.
7. Drill two 5 mm (3/16 in.) holes at the marked locations.
8. Tap nylon anchors (included) flush to wall surface.
9. Place thermostat mounting holes over anchors, and screw the thermo-
stat into place using the included anchor screws (Figure 2).
Follow these steps to wire the TEC-N2s:
1. Connect the wires from the existing system to the thermostat termi-
nals. Refer to Figure 3, and Figure 5 for wiring diagrams.
2. Push any extra wire back into the wall. The wires must be flush to
the plastic base.
3. Plug the hole in the wall to eliminate air drafts on the sensor.
Select Dual Inline Package (DIP) switches to perform a variety of differ-
ent functions: fan runtime delay, keyboard disable, and multistage heating
or cooling.
Note: Before selecting a minimum on/off time for the TEC-N2 series,
verify the equipment can tolerate the following hourly maximum
cycle rates: 7.5 cycles per hour when using 4-minute on/off (pre-
ferred for energy savings) or 15 cycles per hour when using
2-minute on/off.
Wiring the TEC-N2
Series
Thermostats
Setting the DIP
Switches

6TEC-N2 Series Thermostat
HP32-N2 Heat Pump Wiring Configuration and DIP Switch Settings
Table 5: HP32-N2 Heat Pump DIP Switch Selections
DIP
Switch
Selection Description
1On Compressor/Auxiliary Interlocked: turns off the compressor when the auxiliary heat
(E Ht) is on. The compressor will remain off for 2 minutes after the auxiliary heat is
turned off to ensure that the heat pump coil has cooled.
Off Compressor/Auxiliary Normal: allows the compressor and auxiliary heat to be on
simultaneously.
2Off Not used. Switch should remain in the OFF position.
3On Allows 2-minute minimum on/off time for heating or cooling equipment.
Off Allows 4-minute minimum on/off time for heating or cooling equipment (preferred).
4On* Locks the keyboard, disabling buttons to prevent tampering. DAY/NIGHT mode button
can select 1-hour override.
Off Unlocks the keyboard.
5On Comfort: allows the auxiliary heat to be energized when the room temperature error is
greater than 1°F (0.5°C) for 1.5 hours.
Off Economy: minimizes the use of auxiliary heat. If the room temperature error is 1°F
(0.5°C) for 3 hours, auxiliary heat is energized.
6On Allows multistage heating or cooling.
Off Allows single-stage heating or cooling.
7On Liquid Crystal Display (LCD) filter icon ( ) turns on with LED 1 contact closure to
24 VAC.
Off No filter icon.
8On LCD wrench icon ( ) turns on with LED 2 contact closure to 24 VAC.
Off No wrench icon.
*Note: When DIP switch 4 is on, only the DAY/NIGHT mode button can be used to select 1-hour override to
occupied setpoints if in night mode. All other buttons are read-only. The N2 address can also be viewed.
Figure 3: HP32-N2 Heat Pump, Factory-Set DIP Switch Settings,
and Wiring Configuration
145678
ON
23
Compressor/Auxiliary
Normal
Not Used
Heat/Cool: 4 Minute
Minimum On/Off
Keyboard Unlocked
Compressor/Auxillary
Interlocked
Not Used
Heat/Cool: 2 Minute
Minimum On/Off
Keyboard Locked
Comfort
Multistage
LED1 icon (Filter)
LED2 icon
(Wrench/Fault)
Economy
Single-Stage
LED1 icon Off
LED2 icon Off
LED1 Y2 2nd Stage Compressor
HP32-N2
Auxiliary Heating
1st Stage Compressor
Fan
24VAC Power In
24VAC Common
Cool Reversing Valve
Heat Reversing Valve
W1
Y1
G
R
24V
24V(C)
O
B
LED2
CLK1
CLK2
RS2
RS1
RS+V
N2+
N2-
N2 REF

TEC-N2 Series Thermostat 7
Table 6: HP32-N2 Heat Pump Output Terminal Designations
Terminal Function
Y2 Energizes compressor 2 on call for second stage heating or cooling.
W1 Energizes auxiliary heat as third stage heating or emergency heat.
Y1 Energizes compressor 1 on call for first stage heating or cooling.
GEnergizes fan on call for heating or cooling or by pressing FAN button.
RProvides independent switching voltage.
24V Provides 24 VAC from equipment transformer.
24V(c) Provides 24 VAC (common) from equipment transformer.
LED 1, LED 2 LED 1 or LED 2 contact closure to 24 VAC from remote switch.
CLK1, CLK2 Connects remote clock/timer for alternate setpoints.
RS2, RS1, RS+V Connects outdoor air temperature or indoor remote sensors; refer to instructions included
with sensors.
OEnergizes reversing valve in the cooling mode.
BEnergizes reversing valve in the heating mode.
N2+, N2-, Ref N2 Bus
Figure 4: HP32-N2 Heat Pump Wiring Schematic
W1 Y1 Y2 G O B RS1
RS2
N2+ N2- REF
CLK1
CLK2
R24V
T1 T2
24V(c)
LED2
LED1
RS+V
First Stage
Compressor
Auxiliary
Heat
Fan
Reverse
Valve
Heating
Remote
Sensor
(if used)
Electronics
Remote
Clock/Timer
(if used)
Metasys
CPN, FAC,
NCM
Reverse
Valve
Cooling
Second
Stage
Compressor
Jumper
If the transformer (T2) is to power all of the loads, the
yellow pin jumper must be inserted connecting
R to 24V. The jumper is located on the electronics board
above the relays. If a separate 24V transformer (T1) is to
be used, it must be connected between R and 24V(c), and
the jumper should be removed between R and 24V.
Field Contact Switches
Thermostat
Equipment

8TEC-N2 Series Thermostat
GE22-N2 Multistage Wiring Configuration and DIP Switch Settings
Table 7: GE22-N2 Multistage DIP Switch Selections
DIP Switch Selection Description
1On Allows 2-minute minimum on/off time for heating or cooling equipment.
Off Allows 4-minute minimum on/off time for heating or cooling equipment
(preferred).
2On* Locks the keyboard, disabling buttons to prevent tampering. The DAY/NIGHT
mode button can select 1-hour override.
Off Unlocks the keyboard.
3Off Not used. Switch should remain in the OFF position.
4On Allows multistage heating or cooling.
Off Allows single-stage heating or cooling.
5LED 1 icon
On/Off
Optional selection: LCD filter icon ( ) comes on with LED 1 contact closure
to 24 VAC.
6LED 2 icon
On/Off
Optional selection: LCD wrench icon ( ) comes on with LED 2 contact
closure to 24 VAC.
*Note: When DIP switch 2 is on, only the DAY/NIGHT mode button can be used to select 1-hour override to
occupied setpoints if in night mode. All other buttons are read-only. The N2 address can also be viewed.
N
Figure 5: GE22-N2 Multistage Factory-Set DIP Switch Setting and
Wiring Configuration
1456
ON
23
Heat/Cool: 4 Minute
Minimum On/Off
Heat/Cool: 2 Minute
Minimum On/Off
Not Used
Multistage
Not Used
Keyboard Unlocked Keyboard Locked
Single-Stage
LED 1 icon (Filter)LED 1 icon Off
LED 2 icon
(Wrench/Fault)
LED 2 icon Off
LED1 Y2
GE22-N2
1st Stage Heating
1st Stage Cooling
Fan
24VAC Power In
Common
2nd Stage Heating
W1
Y1
G
R
24V
24V(c)
W2
LED2
CLK1
CLK2
RS1
RS2
RS+V
N2+
N2-
N2 REF
2nd Stage Cooling

TEC-N2 Series Thermostat 9
To connect the N2 Bus:
1. Observe the polarity when connecting the N2 Bus wires to the
TEC-N2.
Note: Each TEC-N2 has self-terminating End-of-Line (EOL) resistors.
However, one EOL is needed at the BAS (two are preferred at
opposite ends).
2. Continue this process for each TEC-N2 using the daisy chain wiring
method (Figure 7).
Connecting the
N2 Bus
Table 8: GE22-N2 Multistage Output Terminal Designations
Terminal Function
W2 Energizes on call for second stage heat.
Y2 Energizes on call for second stage cooling.
W1 Energizes on call for first stage heat.
Y1 Energizes on call for first stage cooling.
GEnergizes fan on call for heating or cooling or by pressing the FAN button.
RIndependent switching voltage.
24V 24 VAC from equipment transformer.
24V(c) 24 VAC (common) from equipment transformer.
LED 1, LED 2 Input connection that energizes LED 1 or LED 2 from remote status device to 24 VAC.
CLK1, CLK2 Connections for remote clock/timer for alternate setpoints.
RS2, RS1, RS+V Connection for outdoor temperature sensor and/or indoor remote sensor option; refer to
instructions included with sensors.
N2+, N2-, REF Metasys N2 Bus connections
Figure 6: GE22-N2 Multistage Wiring Schematic
W1 Y1 W2 Y2 G RS1
RS2
N2+ N2- REF
CLK1
CLK2
R24V
T1 T2
24V(c)
LED2
LED1
RS+V
Fan
Remote
Sensor
(if used)
Electronics
Remote
Clock/Timer
(if used)
Metasys
CPN, FAC,
NCM
First
Stage
Compressor
Second
Stage
Compressor
Jumper
If the transformer (T2) is to power all of the loads, the
yellow pin jumper must be inserted connecting
R to 24V. The jumper is located on the electronics board
above the relays. If a separate 24V transformer (T1) is to
be used, it must be connected between R and 24V(c), and
the jumper should not be connected between R and 24V.
Field Contact Switches
Thermostat
Equipment
First Stage
Heat
Second
Stage
Heat

10 TEC-N2 Series Thermostat
Connecting to
N30 Series
Connecting to
the Companion/
Facilitator
System
Figure 7: Connecting the TEC-N2 to an NCM
TEC-N2
N2 REF
To
Next
N2
Device
N2-
N2+
N2+
81
72
36 SFT
HRD
NCM200 Series
(TB1 or Communicator
Terminal Board)
NCM300 Series
Port 1 - N2 Bus
GRD
GRD
REF
or SFT
GRD
N2+
N2-
N2-
N2 REF
N2+
N2-
N2
REF
{
TEC-N2
N2 REF
To
Next
N2
Device
N2-
N2+
N2+
N2+
24 VAC
N30
N2-
REF
S
DS2
DS1
DS3
N2-
N2 REF
N2+
N2-
N2
REF
{
Figure 8: Connecting the TEC-N2 to the N30 Series
Figure 9: Connecting the TEC-N2 to the
Companion/Facilitator System
TEC-N2
N2+
24VAC N2+
N2-
REF
N2 Bus
Connector
24VAC
GND
N2-
Companion/Facilitator
Transformer
N2 REF
N2+
N2-
REF