TCX 850
Installation Guide
Andover Controls Corporation i
Downloaded from - http://www.guardianalarms.net
Version F
Reproduction or d istribution forbi dden.
Copyright 1997 by Andover Controls.
Subject to change without notice.
Order No. 30-3001-173
Copyright
1997
Andover Controls Corporation
300 Brickstone Square
Andover, Massachusetts 01810
All Rights Reserved.
Published by the Engineering Departm ent at Andover Controls Corporation.
IMPORTANT NOTICE
This product is subject to change without notice. This document does not constitute any warranty, express or implied. Andover Controls Corpor ation reserves the right to alte r cap ab ilities, performanc e, and pres e ntation of this
product at any time.
ii TCX 850 Installation Guide
Preface
The Andover Controls TCX 850 Installation Guide presents instru ctions for installing the TCX 850 on an Infinet network. It first presents
site preparation infor mation and then step-by-step ins ta llation
instructions.
Andover Controls Corporation iii
iv TCX 850 Installation Guide
Contents
Setting Up the TCX 850 Controller and Infinet
Site/System Setup Requirements .............................................................2
Controller Dimensions and Weight ...............................................3
Power Requirements ......................................................................3
Cable Limitations . ..... .... ... ..... .. ..... .... ... ...... . ..... .. ..... .... ... ...... . ....... .. .3
Lightning Protection ......................................................................4
Building Ground Requirements ..................................................... 4
Inspecting the Ground ....................................................................5
Environmental Requirem en ts ....... ......... .......... ......... ......... .......... ..5
Output Equipment Requirements ..................................................5
Input Circuit Specifications ...........................................................6
Special Factors for Thermistors .....................................................6
Air Flow Sensor Requirements ......................................................8
Laying Out the Site Setup ..............................................................8
Installing the TCX 850 .............................................................................9
Unpacking ........... ......... .......... ......... ......... .......... ......... .......... .........9
Parts Requir ed ................ .......... ......... .......... ......... .......... ......... .......9
Mounting ............. ......... .......... ......... ......... .......... ......... .......... .........9
Connecting the Battery ................................................................11
Connecting the AC Power ...........................................................1 1
Wiring the Infinet to the TCX 850 ........................ ....... ....... ....... .1 5
Wiring the Infinet to the Infinity CX 9000 ..................................15
Andover Controls Corporation v
Wiring the Inputs .........................................................................16
Connecting the Air Flow Sensor ..................................................2 0
Wiring the Outputs ......................................................................27
Wiring Tristate Output .................................................................27
Wiring Form A Outputs ...............................................................27
Connecting Modules to the Expansion Port ................................28
Powering Up the TCX 850 .....................................................................2 9
Reset Button ............ .......... ......... .......... ......... .......... ......... ......... ...30
Setting the Air Flow Potentiometers ............................................30
Completing the Installation ..........................................................3 0
Connecting the Andover Controls Service Tool .................. ....... .3 0
vi TCX 850 Installation Gu ide
Figures
Figure 1. The Front of the TCX 850 . ... ....... ....... ..... ....... ....... ....... ....... .1 0
Figure 2. Locations of Screw Holes and Parts Inside TCX 850 ......... .1 2
Figure 3. Diagram of the TCX 853 Controller ....................................1 3
Figure 4. Metal Plate and Screw for AC Power Wire .........................14
Figure 5. Infinet Cable Wiring to FASTON Receptacles ....................15
Figure 6. Schematic of Input Wiring for Thermistor ..... ....... ....... ....... .1 8
Figure 7. Schematic of Wiring for Counter or Digital Input ...............18
Figure 8. Schematic of Wiring for Voltage Input ................................18
Figure 9. Schematic of Wiring for Current Input................................ 19
Figure 10. TCX 850—Connecting Tubes/Wiring Air
Flow Sensor in VAV Box (VAV Cooling Only) ................22
Figure 11. TCX 850—Connecting Tubes/Wiring Air Flow
Sensor in VAV Box (One Stage Electric Heat) ...................2 3
Figure 12. TCX 850—Connecting Tubes/Wiring Air Flow
Sensor in VAV Box (Two Stage Electric Heat) ...................24
Figure 13. TCX 850—Connecting Tubes/Wiring Air Flow Sensor in
VAV Box (One Stage Electric Heat and One Fan) ..............25
Figure 14. TCX 850—Connecting Tubes/Wiring Air Flow Sensor in
VAV Box (Two Stage Electric Heat and One Fan) .............26
Figure 15. Schematic of Tristate Output Wiring ...................................27
Figure 16. Schematic of Form A Output Wiring ...................................28
Andover Controls Corporation vii
Table 1. Wire Gauges and Corresponding Maximum
º
Runs for Sensing Temperatures Up to 70
F ..........................7
Table 2. Wire Gauges and Corresponding Maximum
Runs for Sensing Temperatures Up to 100
º
Table 3. Wire Gauges and Corresponding Maximum
Runs for Sensing Temperatures Up to 150
º
Tables
F ........................7
F ........................8
viii TCX 850 Installation Guide
Setting Up the TCX 850
Controller and Infinet
This manual covers the following:
• Site/System Setup Requirement s
• Installing the TCX 850 or any controller in the TCX 850 family
All of the instructions in this manual referring to the TCX 850 apply
to the other TCX controllers, except those for the air flow sensor,
found only on the 850 model.
Warranty Registration
Your warranty is effective for 18 months starting on the date the system
is shipped.
Warning
All wiring and installations must comply with local, state, and national
electrical codes.
Hardware Instal lation
Site/System Setup Requirements
Before you proceed to install the system, you should map out where you
plan to install each controller, terminal/workstation, and modem. When
planning the sites, be aware of any electrical interference that may occur. You also need to be aware of cabinet dimensions, power
requirements, cable limitations, an d environm ental requir e ments .
Note
This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the 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
instructions in this 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 own expense.
Note
This digital apparatus does not exceed the Class A limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.
Avis
Le présent appareil numérique n’émet pas de bruits radioélectriq ues
dépassant les limites applicables aux appareils numériques de la class A
prescrites dans le Règlement sur le brouillage radioélectrique édicté par
le ministère des Communications du Canada.
2 TCX 850 Installation Guide
Hardware Installation
Controller Dimensions and Weight
Each TCX 850 is 9 × 5.75 × 2.75 in. and weighs 2.5 lbs.
Power Requirements
Caution
The TCX 850 should receive power from its own independent,
unswitched circuit.
The TCX 850 operates on a power supp ly of 24 VAC +/– 2 0% 5 0
or 60 Hz (fo r s moke control applicat ions, +10/ –1 5%, 60 Hz).
The TCX 850 consu mes 20 VA of power.
Cabl e Limitations
The maximum cable length for Infinet is 4,000 ft at 19,200 baud (up to
32 Infinet controllers). You can extend Infinet beyond 4,000 ft or put
more than 32 Infinet contr ollers on less than 4,00 0 ft by using the In-
fiLink 200 amplification module.
Note
You mu s t use s hie ld ed ca bl es f o r Infinet to ensure compliance with the
Class A FCC limits and to provide reliable communications.
Cables that form Infinet are 24-gauge, single-t wis ted-pair , tin ned,
shielded copper wire. Use the following cables1 or their equivalents:
• Brand Rex # H 9002 (single-pair)
• Anixter # 9J2401021 (single-pair plenum cable)
The cable should have a nominal impedance of 100 Ohms and a
nominal velocity of propagation of 78%.
1. You can also use any cables you may already have in place for ACNET or LBU.
TCX 850 Installation Guide 3
Capacitance of Infinet cable should be nominal, below 12.5 pF/ft between conductors and below 22 pF/ft between the conductor connected
to ground and the next conductor.
Lightning Protection
Each TCX 850 has two 1500 V spark gap capacitors and a metal oxide
varistor built into the board to protect against line transients. However,
this protection is not sufficient to pro tect against lig htning.
Lightning arresters are required at each point where Infinet cable enters
or exits a building. Use the following arrester:
Two pair gas tube arrester, Andover Controls # 01-2100-299
Building Ground Requirements
Hardware Instal lation
Warning
Be sure that all Infi nity products from Ando ver Controls Corporation
are grounded to true earth ground. This kind of ground protects the
equipment from transients and other power surges in the area.
We cannot guarantee that the controller system will operate as
documented unless you properly grou nd all control lers .
Warning
Be sure to have your grounds inspected before you begin the
installation process to be sure your municipality follows the National
Electrical Code. M a ny muni ci palitie s do not an d often have
substandard electrical grounds.
An example of a substandard ground is a galvanized steel cold water
pipe. As the pipe corrodes, it does not act as a true ground. The corrosion acts as an insulator, raising the potential of the pipe with respect to
the ground.
4 TCX 850 Installation Guide
Hardware Installation
When lightning strikes in the area of the ins talla tion, it drastically
changes the potential of the earth. Since properly grounded Andover
Controls units respond to changes in potential more rapidly than poorly
grounded electrical systems, a poorly grounded buildi ng tries to reach
ground through the Andover Controls system. The surge of current can
destroy electronic components on the controller board.
Surges of much lower potential than lightning also impact the reliability
of Andover Controls equipment.
Inspecting the Ground
You can check your ground as follows:
1. Check your ground by first inspectin g the building power
distribution panel for earth ground termination. If the ground
termination is any of the following, it is not adequate and must be
corrected:
• Does not exist.
• Is connected to a corroded or galvanized pipe.
• Is connected using a small gauge wire (less than 14 AWG).
2. Be sure your Andover Controls cabinet is connected to the ground
with a copper conductor that terminates at the distribution panel.
Environmental Requirements
The TCX 850 operates in rooms with temperatures ranging from 32 to
120°F and with humidity up to 85%, non-condensing.
The controller must be in an Underwriter Laboratories listed enclosure.
Output Equipment Requirements
The four outputs on the TCX 850 provide direct digital control for electronic devices and bi-directional motors and actuators . The first three
outputs are Form A (single pole, single throw) and the fourth is Form K
tristate.
TCX 850 Installation Guide 5
Both types of outputs have pulse width modulation (PWM). PWM lets
you modulate valves and dampers to 0.1 sec resolution.
All outputs are programmable. Since there is no manual override
switch, the controller always controls all outputs.
The Form A relay of each output is rated for 5 A at 50 VAC.
Input Circuit Specifications
Caution
Andover Controls inputs are designed to be used with two-wire devices
and do not provide sufficient power to operate sensors or transducers
requiring an external power supply.
Hardware Instal lation
The following specifications apply to the four TCX 850 inputs :
• Voltage Range—0 to 5.115 V
• Resolution—0.005 V
• Accuracy—+/–0.015 V
• Maximum Pulse Frequency—5 Hz at a duty cycle of 50% with a
minimum pulse width of 100 ms
• Input Impedance—10K Ω referenced to 5.120 V
• Filtering—Corner Frequency at 15 Hz, –20 db/decade
• Over-Voltage Protection—24 VAC RMS or 24 VDC indefinitely on
any single channel; +/–1500 V transient for 50 µs on all channels
• Calibration—Per manent (f actory)
Special Factors for Thermistors
To keep thermistor errors minimal, lay out your site so you can limit the
length of wire runs to the maximum for the gauge wire you select.
6 TCX 850 Installation Guide
Hardware Installation
Table 1 shows the maximum runs for wires of various gauges to keep
errors within .5°F, .25°F, and .10°F when sensing temperatures up to
70°F.
Table 1. Wire Gauges and Corresponding Maximum Runs
for Se nsing Temperatures Up to 70
Gauge
#14 26,700 ft
#16 16,700 ft
#18 10,500 ft
#20 6600 ft
#22 4100 ft 2000 ft 800 ft
1
/
°
2
F Error
1
F Error
°
/
4
13,300 ft
8300 ft
5200 ft
3300 ft
°
F
1
F Error
°
/
10
5300 ft
3300 ft
2100 ft
1300 ft
Table 2 shows the maximum runs for wires of various gauges to keep
errors minimal when sensing temperatures up to 100°F.
Table 2. Wire Gauges and Corresponding Maximum Runs
for Se nsing Temperatures Up to 100
°
F
Gauge
#14 12,600 ft
#16 7900 ft
#18 5000 ft
#20 3100 ft
#22 1900 ft 900 ft 300 ft
1
/
°
2
F Error
1
F Error
°
/
4
6300 ft
3900 ft
2500 ft
1500 ft
1
F Error
°
/
10
2500 ft
1500 ft
1000 ft
600 ft
Table 3 shows the maximum runs for wires of various gauges to keep
errors minimal when sensing temperatures up to 150°F.
TCX 850 Installation Guide 7
Hardware Instal lation
Table 3. Wire Gauges and Corresponding Maximum Runs
°
for Se nsing Temperatures Up to 150
F
Gauge
#14 4100 ft
#16 2600 ft
#18 1600 ft
#20 1000 ft
#22 600 ft 300 ft 100 ft
1
/
°
2
F Error
1
F Error
°
/
4
2000 ft
1300 ft
800 ft
500 ft
Air Flow Sensor Requirements
Air flow sensors each require a 5 micron air filter that is shipped with
the TCX 850. Each also requires two 1/4-in OD pneumatic tubes for
connecting the pitot tube or cross flow sensor to the air flow sensor.
The pneumatic tubes can be up to 15 in. long
Laying Out the Site Setup
1
F Error
°
/
10
800 ft
500 ft
300 ft
200 ft
You may want to draw a map of where you plan to put each controller
and store it in a notebook.
Find the tag attached to each controller that gives the number of the controller. Before you remove any tags, be sure the tag has all of the
following information on it:
• Location of the controller.
• Serial number.
• Model name and number.
• Communications port the Infinet connects to on Infinity CX 9000.
Then collect the tags. You will need to know where your controll ers are
located when you later assign a name to each controller and each input
and output.
8 TCX 850 Installation Guide
Hardware Installation
Installing the TCX 850
Unpacking
Be careful when unpacking the unit to not damage the packaging
material—you must reuse it if you ship the produ ct back for repair.
Parts Required
• TCX 850 Controller
• AC Power Cable
• Input and Output Wires
• Two 1/4-in. Diameter Tubes for Air Flow Sensor
• Three to six varistors
• 5-micron Ramay Filter (shipped with TCX 850)
• Infinet Cable (twisted pair)
• InfiLink 200s as Hubs, Repeaters, or Cable Switching Boxes
Mounting
Caution
You must encase the TCX 850 in a UL listed cabinet to keep its Open
Class rating.
1. Before you begin, look at the top of the TCX 850 cabinet.
Figure 1 shows the front and top of the TCX 850.
2. The top of the TCX 850 has a finger-cutout. Insert your index finger
in the cutout and pull. The snap latch releases and the front cover
disconnects from the unit.
3. Remove the front cover and place it to one side.
TCX 850 Installation Guide 9
Figure 1. The Front of the TCX 850
Finger
Cutout
Hardware Instal lation
MIN MAX SP
–+ –+–+
CPU
TD
RD
10 TCX 850 Installation Guide
Hardware Installation
Warning
Never drill holes in the TCX 850 cabinet or boards. A metal shaving
could easily short circuit the electronics.
4. Screw the TCX 850 to the wall using standard No. 6 screws in the
.156 diameter pre-cut holes in the four corners of the base plate.
Figure 2 shows the locatio n of the corner screw holes. It also shows the
locations of the openings on the side of the TCX 850 that access inputs,
outputs, and the Infinet connection. Note that many parts are labeled in
this drawing. You may want to refer to this figure throughout the
installation process for locations of other parts.
Connecting the Battery
When you have the controller mounted, find the AA battery in the
lower right corner (see Figure 2). Remove the plastic tab under the clip
on the battery to activate the battery.
The battery is a 850 mA-hr 3.6 V primary lithium battery that maintains
RAM when AC power goes out.
Connecting the AC Power
Warning
Be sure the AC power cable is not connected to an electrical power
source while you are wiring the controller, or you could receive an
electrical shock that is life-threatening.
The AC power connection is in the upper left corner of the controller
(see Figure 2). You must wire the AC cable to the three screws on the
1
-- 2
far left.
TCX 850 Installation Guide 11
Hardware Instal lation
Figure 2. Loca tions of S crew Holes and Parts Inside TCX 850
.24
2 PLACES
.72
2 PLACES
.78
3.09
8.100
2 PLACES
G
N
D
N
E
U
H
O
T
IN1
RET
IN2
RET
IN3
RET
IN4
RET
5.45
4.000
2 PLACES
AC Power
Connection
+
Inputs
High Low
Port
INPUT 8
P1 P2
Reset Button
+
IN5 IN6 IN7
MIN
Potentiometers
Port
Infinet
Connection
MAX
Service
Port
OUT1
OUT2
OUT3
OUT4
+
–
SP
SHLD
Outputs
C
NO
C
NO
C
NO
C
ON
ON
+
2.18
6.73
8.70
–
Battery
+–
Expansion
Module
(The TCX 85 1 is the same as the TCX 850, but it has only the first four inputs.)
12 TCX 850 Installation Guide
Hardware Installation
Figure 3 shows the TCX 853 controller. This pa rticular controlle r ha s
inputs and outputs similar to those on the TCX 850, only in this case 7
and 8 are both air flow sensors.
Figure 3. Diagram of the TCX 853 Controller
G
N
D
N
E
U
H
O
T
+
IN1
RET
IN2
Inputs
RET
IN3
RET
IN4
RET
IN5
RET
IN6
RET
Inputs
INPUT 7
+
OUT1
OUT2
OUT3
OUT4
+
–
C
NO
NO
NO
ON
ON
C
C
C
Outputs
INPUT 8
+
SHLD
–
+–
TCX 850 Installation Guide 13
Hardware Instal lation
Caution
Be sure to connect all three wires, HOT, NEUTRAL, and GROUND.
Otherwise, the controller could malfunction.
Note the parts of the controller labeled here. You may want to refer to
this figure for assistance in loca ting pa rt s dur ing the ins ta llation process.
The three screws are labeled HOT NEU GND. The three wires at the
end of your AC cord are black, white, and green.
Take the following steps to connect the AC power wire:
1. Place the green wire under the metal plate behind the top screw,
labeled GND.
2. Tighten the screw with a flathead screw driver.
Figure 4 shows the position of the plate, where to place the wire, and
how the screw fits on the plate. You can see how the screw holds
the plate in place once you tighten it.
Figure 4. Metal Plate and Screw for AC Power Wire
Metal Plate
Insert Wire Here
3. Place the white wire under the metal plate behind the middle screw,
labeled NEU.
4. Tighten the screw with a flathead screw driver.
5. Place the black wire under the metal plate behind the bottom screw,
labeled HOT.
6. Tighten the screw with a flathead screw driver.
14 TCX 850 Installation Guide
Hardware Installation
Wiring the Infinet to the TCX 850
Figure 5 illustrates how to w ire the Infinet cable to the FASTON
terminals in the lower right corner of the TCX 850.
Figure 5. Infinet Cable Wiring to FASTON Receptacles
WHITE
BLACK
WHITE
+
SHLD
–
BLACK
1. Trim back the shield over the wires.
2. Using a right angled fast-on connector, clip the appropriate wire to
the first terminal labeled with a plus sign.
3. Using a right angled fast-on connector, clip the appropriate wire to
the first terminal labeled with a minus sign.
4. Using a right angled fast-on connector, clip the appropriate wire to
the second terminal labeled with a plus sign.
5. Using a right angled fast-on connector, clip the appropriate wire to
the second terminal labeled with a minus sign.
Later when you want to break the Infinet for testing purposes, you
need only disconnect one set of wires.
6. Connect the shields from both th e first and second controller s to the
terminal labeled SHLD. Use a right angled fast-on connector to clip
the s h ield to the term inal.
Wiring the Infinet to the Infinity CX 9000
You connect the last piece of Infinet cabl ing to the Infinity CX 9000.
See the Infinity CX 9000 Hardware Installation Guide for instruction s.
TCX 850 Installation Guide 15
Wiring the Inputs
Caution
Do not remotely ground any part of the sensor wiring. Remote grounds
connected to the TCX 850 return terminal could make the co ntroller
operate incorrectly or damage the equipment. The signal return is not
true earth ground. It is an electronic reference point necessary to
interpret the sensor properly. Do not externally ground sensor or switch
terminals that return to the TCX 850.
Caution
Although inputs usually function properly with unshielded sensor wire,
Hardware Instal lation
you may need shielded wire if you run the wire as follows:
• In the same conduit with other noise-generating conductors such as
60 Hz AC power.
• In long runs close to large power-consuming or power-generating
equipment that can produce 60 Hz noise.
We recommend you run input wiring in a conduit separate from AC
power or output wiring and avoid long wiring runs.
16 TCX 850 Installation Guide
Hardware Installation
Caution
Follow the rules below when wiring inputs and outputs:
• Never lay wires across the surface of t he printed circuit board. You
should bring input wires in from the left and output wires in from the
right.
• Bundle excess wires toward the back of the cabinet to avoid any
contact with circuit boards.
• Wires should never be within 1 in. of any component on the printed
circuit board.
• Keep cabinet free of foreign materials (extra power supplies, relays,
and so on).
• Be careful when stripping wire not to drop small pieces of wire
inside the cabinet.
If you violate any of these rules, the controller could malfunction.
Caution
Never apply a voltage to a thermistor. Doing so alters the thermistor’s
accuracy and reliability. You should replace a thermistor that has had
voltage applied to it. Never bring a soldering iron to within 3 inches of
the thermistor’s sensing tip.
The first four inputs are on the upper left side of the TCX 850, below the
AC power connection. Notice that the inputs are labeled IN1, RET,
IN2, RET and so on. Each return terminal goes with the preceding input.
Inputs 5, 6, and 7 are labeled MIN, MAX, and SP, in that order. They
are to the right side of the TCX 850, below the outputs . Input 8 is the
air flow sensor connection just below and to the left of the center on the
TCX 850 board. Input 8 has the P1 and P2 port labels.
TCX 850 Installation Guide 17
Hardware Instal lation
Figure 6 shows a thermistor attached to an input point. One lead
connects to the numbered input terminal, the other to a return terminal.
Figure 6. Schematic of Input Wiring for Thermistor
IN1 (input point 1)
RET (return)
Follow these steps to connect Inputs 1 through 4:
1. Using a right angled fast-on connector, clip the first wire for the first
sensor to the terminal labeled for input 1.
2. Again, using a right angled fast-on connector, clip the ground wire
for the first sensor to the first terminal labeled RETURN.
3. Repeat the steps 1 and 2 for each input.
Figure 7 shows a counter wired to an input point.
Figure 7. Schematic of Wiring for Counter or Digital Input
1 (input point 1)
RET (return)
Figure 8 shows a voltage sensor wired to an input point.
Figure 8. Schematic of Wiring for Voltage Input
1 (input point 1)
V
RET (return)
18 TCX 850 Installation Guide
Hardware Installation
Figure 9 shows a current sensor wired to an input point. You must wire
a resistor across the input.
Figure 9. Schematic of Wiring for Current Input
V
Ref
= 5.120
R
Pullup
= 10K
1 (input point 1)
R
= 249Ω with wattage
Sensor
rating
1
-- -
≥
4
Watt
RET (return)
The exact number of Ohms resistance required varies based on the range
of current—while we recommend 249Ω for a 0 to 20 mA input, yo u can
also calc u late the appropriate resistance with th e fo llowing for mul a:
S
10
R
IN
V
---------------------------------------------------------=
max
KI
S
R
5.120+×
10 K+
For 20 mA (the maximum current), the input voltage is approximately
5 V if you have a sensor resistance of 249 Ω. The input voltage must be
between 0 and 5.115 V.
To account for the input current rising slightly above the maximum
(such as slightly over 20 mA), you should choose a value slightly below
the maximum resistance that solves the equation. You then select the
next standard resistor wi th a 0.1% or 1% tolerance. (The accur acy of the
input is directly proportional to the tolerance of the resistor. So the lower the tolerance, the greater the accurac y.) The wattage rating should be
1
greater than or equal to watt. Be sure you check the Andover Controls
-- 4
Infinity CX Programmer’s Guide for details on how to convert the voltage from a current input to other units.
TCX 850 Installation Guide 19
Connecting the Air Flow Sensor
Follow these steps to connect Input 8, the air fl ow sensor:
1. Attach the 5 micron filter to one piece of 1/4-in. OD tubing for the
air flow sensor.
2. Run the tubing through the side opening on the controller.
3. Connect one end of the tubing with the filter on it to the sensor tube
marked high port (P1) on the controller.
See Figure 10 to determine where you connect the 1/4-in. tubing to
the controller and to the VAV box. This drawing illustrates how to
wire the inputs for a VAV box that does cooling only.
4. Connect the other end of the tubing to the HI opening on the VAV box.
Hardware Instal lation
5. Connect one end of the tubing with no filter on it to the sensor tube
marked low port (P2) on the controller.
6. Connect the other end of the tubing to the LO opening on the VAV
box.
7. When you wire the damper motor on the VAV box (again, see
Figure 9), you connect a varistor from the COMMON connection to
the OPEN connection and from the COMMON connection to the
CLOSE connection. When the contact is open (the motor stopped),
the magnetic field in the motor produces a large electrical spike.
Varistors at the source arrest the spike.
20 TCX 850 Installation Guide
Hardware Installation
Caution
In rare cases, you may install varistors at the alternate location (shown
in Figures 10 through 14), but if you do, you must not directly terminate
them to the TCX 850 or the controller will fail.
Figure 11 shows the VAV connections for cooling with one stage
electric heat.
Figure 12 shows the VAV connections for cooling with two stage
electric heat.
Figure 13 shows the VAV connections for cooling with one stage
electric heat and one fan.
Figure 14 shows the VAV connections for cooling with two stage
electric heat and one fan.
TCX 850 Installation Guide 21
Hardware Instal lation
120 VAC to 24 VAC Transformer
Bi-Directional Damper Motor
Control Wire
Tubing (1/4 Inch O.D.)
Sheet Metal Screws
AIR
FLOW
----------
----------
----------
----------
----------
11114
TCX 850 to VAV Terminations
COM
OPEN
CLOSE
VAV Box
39 V Varistors
(Preferred Location)
PARTS LIST
39 VAC Varistor
5 Micron Ramay Filter
TCX Mounted on Plate
If alternate position must be used, varistors must not
Varistors should be installed at actuators if possible.
be dire ctly terminated to TC X or TCX f ailure may occur.
Part No. Description Qty. Part No. De scription
01-2020-030
----------
----------
1/4 Inc h O.D. Tygon or Equivalent Tubing for
Distances Less Than or Equal To 15 Inches (TYP)
311
ANDOVER CONTROLS BOX MANUFACTURER’S
Qty.
(VAV Cooling Only)
39 V Varistors
(Alternate Location
If Absolutely Necessary)
INFINET
+
-
SHLD
( + )
( + )
( – )
( – )
120 V Constant
Fused Power
Earth
Ground
OUTPUTS
Low PortHigh Port
.
g
of Filter
120 VAC24 VAC39 V
See Note
24 VAC
INPUTS
FILTER
OUT IN
Note Direction
Typical TCX 850 En closure
39 V Varistor
(Not Necessarily Provided by Andover Controls)
To Oth e r
VAV Boxes
Fi
As Required
22 TCX 850 Installation Guide
Note: If the installation requires the secondary of the 24V
transformer to be grounded, always connect the "neutral"
to ground and only ground it at the transformer
Hardware Installation
ELE
AIR
CTRICREHE
FLOW
39 V Varistor Installed
Across Relay Coil
120 VAC to 24 VAC Transformer
Bi-Directional Damper Motor
Control Wire
Tubing (1/4 Inch O.D.)
Sheet Metal Screws
24 VAC, DPDT, 10 A Relay----------1
Relay
T
A
Heater
Stage 1
COM
Circuit
Control
----------
----------
----------
----------
11114
----------
TCX 850 t o VAV Terminations
COM
OPEN
CLOSE
VAV Box
PARTS LIST
39 VAC Varistor
5 Mic ron Ramay Filter
TCX Mounted on Plate
be directly terminated to TCX or TCX failure may occur.
Varistors should be installed at actuators if possi ble.
If alternate position must be used, varistors m ust not
39 V Varistors
Part No. Description Qty. Part No. Description
01-2020-030
----------
----------
(Preferred Location)
(VAV Cooling Only with One Stage Electric Heat)
120 V Constant
39 V Varistors
(Alter nate Loca tion
If Absolutely Necessary)
Fused Power
Earth
Ground
OUTPUTS
1/4 Inch O.D. Tygon or Equivalent Tubing for
Distances Less Than or Equal To 15 Inches (TYP)
Low PortHigh Port
411
ANDOVER CONTROLS BOX MANUFACTURER’S
Qty.
INFINET
+
-
SHLD
( + )
( + )
( – )
( – )
.
u
g
of Filter
120 VAC24 VAC39 V
39 V Varistor
See Note
24 VAC
INPUTS
OUT IN
FILTER
Note Direction
Typical TCX Enclosure
(Not Necessarily Provided by Andover Controls)
To Other
VAV Boxes
Fi
As Required
TCX 850 Installation Guide 23
Note: If the installation requires the secondary of the 24V
transformer to be grounded, always connect the "neutral"
to ground and onl y ground it at the transformer
ELE
VAV Box
39 V Varistors
CTRICREHE
(Preferred Location)
COM
AIR
A
OPEN
Hardware Instal lation
FLOW
39 V Varistor Installed
Across Relay Coil
Stage 1
T
Heater
CLOSE
COM
Circuit
Control
PARTS LIST
1/4 Inch O.D. Tygon or Equivalent Tubing for
Distances Less Than or Equal To 15 Inches (TYP)
ANDOVER CONTROLS BOX MANUFACTURER’S
120 VAC to 24 VAC Transformer
---------11114
39 VAC Varistor
Part No. Description Qty. Part No. Description
01-2020-030
511
Qty.
Bi-Directional Damper Motor
Control Wire
----------
----------
5 Micron Ramay Filter
TCX Mounted on Plate
----------
----------
Tubing (1/4 Inch O.D.)
Sheet Metal Screws
24 VAC, DPDT, 10 A Relay----------2
----------
----------
be dir ectly terminated to TCX or TCX failure may occur.
Varistors should be installed at actuators if possible.
If alternate position must be used, varistors must not
g
(VAV Cooling Only with Two Stage Electric Heat)
TCX 850 to VAV Terminations
39 V Varistors
(Alternate Location
If Abso lutely Nece ssary)
INFINET
+
-
SHLD
( + )
( + )
( – )
120 V Const ant
Fused Power
Earth
Ground
OUTPUTS
Low PortHigh Port
( – )
230 VAC24 VAC39 V
39 V Varistor
See Note
24 VAC
OUT IN
INPUTS
To Other
VAV Boxes
Fi
As Required
24 TCX 850 Installation Guide
of Filter
FILTER
Note Direction
Typical TCX Enclosure
(Not Necessarily Provided by Andover Controls)
.
Note: If the installation requires the secondary of the 24V
transformer to be grounded, always connect the "neutral"
to ground and onl y ground it at the transformer
Hardware Installation
VAV Box
ELE
CTRIC
REH
Air
Flow
T
E
A
Heater
Stage 1
COM
Circuit
Control
39 V Varistor
Heating
Stage 1
Fan
Power
120 VAC to 24 VAC Transformer
Bi-Directional Damper Motor
Control Wire
Tubing (1/4 Inch O.D.)
Sheet Metal Screws
24 VAC, DPDT, 10 A Relay----------2
39 V Varistor
Fan
COM
OPEN
CLOSE
PARTS LIST
----------
----------
----------
----------
11114
39 VAC Varist or
5 Micron Ramay Filter
TCX Mounted on Plate
----------
Varistors should be installed at actuators if possibl e.
If alternate position must be used, varistors m ust not
be dire ctly terminated to TCX or TCX failure may occur.
TCX 850 to VAV Terminations
39 V Varistors
Part No. Description Qty. Part No. Description
01-2020-030
----------
(Preferred Location)
1/4 Inc h O.D. Tygon or Equivalent Tubing for
Distances Less Than or Equa l To 15 Inch es (TYP)
(VAV Cooling Only with One Stage Electric Heat
and One Fan (Int e gral or Constant))
39 V Varistors
(Alternate Location
If Absolutely Necessary)
120 V Constant
Fused Power
Earth
Ground
OUTPUTS
Low PortHigh Port
Infinet
( + )
ANDOVER CONTROLS BOX MANUFACTURER’S
INFINET
+
SHLD
( + )
120 VAC24 VAC39 V
24 VAC
FILTER
OUT IN
----------
511
Qty.
-
( – )
( – )
of Filter
Note Direction
Typical TCX 850 Enclosure
39 V Varistor
See Note
INPUTS
(Not Necessarily Provided by Andover Controls)
u
g
To Other
VAV Boxes
Fi
As Required
TCX 850 Installation Guide 25
transformer to be grounded, always connect the "neutral"
to ground and only ground it at the transformer.
Note: If th e install ation requires th e secondar y of the 24V
Hardware Instal lation
Air
Flow
Stage 1
ELE
CTRICREHE
T
A
Heater
Stage 2
COM
Circuit
Control
39 V Varistor
Heating
Stage 2
Stage 1
120 VAC To 24 VAC Transformer
Bi-Directional Damper Motor
Control Wire
Tubing (1/4 Inch O.D.)
----------
----------
----------
----------
11114
Sheet Metal Screws
24 VAC, DPDT, 10 A Relay----------2
----------
Fan
Power
Heating
39 V Varistor
Fan
VAV Box
COM
OPEN
CLOSE
PARTS LIST
Varistors should be installed at actuators if possible.
If alternate position must be used, varistors must not
be directly terminated to TCX or TCX failure may occur.
39 V Varistors
39 VAC Varistor
5 Micron Ramay Filter
TCX Mounted on Plate
(Preferred Location)
1/4 Inch O.D. Tygon or Equivalent Tubing for
Distan ces Less Than or Equal To 15 Inches (TYP)
(VAV Cooling Only with Two Stage Electric Heat
and One Fan (Integral or Constant) )
TCX to VAV Terminations
39 V Varistors
(Alternate Location
If Absolutely Necessary)
Infinet
120 V Constant
Fused Power
Earth
Ground
OUTPUTS
( + )
Low PortHigh Port
120 VAC24 VAC39 V
24 VAC
OUT IN
Part No. Description Qty. Part No. Description
01-2020-030
----------
----------
611
ANDOVER CONTROLS BOX MANUFACTURER’S
Qty.
INFINET
+
-
SHLD
( + )
( – )
( – )
of Filter
FILTER
Note Direction
Typical TCX Enclosure
g
See Note
39 V Varistor
i
F
To Other
VAV Boxes
As Required
INPUTS
(Not Necessarily Provided by Andover Controls)
transformer to be grounded, always connect the "neutral"
to ground and only ground it at the transformer.
Note: If th e installation re quires t he secondar y of the 24V
26 TCX 850 Installation Guide
Hardware Installation
Wiring the Outputs
The outputs are along the upper right side of the TCX 850. All output
wires should enter from the right. Notice that the first three outputs,
Form A, are labeled from the top down C, NO, C, NO, C, NO. The last
output is the tristate one, label ed C, +, –.
Wiring Tristate Output
Only the fourth output is tristate. To wire it, you connect three terminations only—Common (C), Plus (+), and Minus (–).
1. Wire the tristate output as shown in the diagram.
Figure 15 shows the diagram.
2. Use a right angled fast-on connector and clip the appropriate wire to
each terminal.
Figure 15. Schematic of Tristate Output Wiring
Note that all tristate outpu ts fail in the OFF stat e if there is no power.
They are forced to the OFF position for 2 min upon reset or powerup
before being program controlled.
Wiring Form A Outputs
You wire the outputs for Form A as follow s:
1. Use a right angled fast-on connector and clip the C and NO wires to
the C and NO terminals.
C
+ON
–ON
2. When switching inductive loads (relays, contactors, motors, or
valves), be sure to install metal oxide varistors across the coil of the
device being switched.
TCX 850 Installation Guide 27
Hardware Instal lation
Figure 16 shows the schematic for wiring a Form A output.
Figure 16. Schematic of Form A Output Wiring
C
NO
Connecting Modules to the Expansion Port
The expansion port at the bottom center of the controller board allows
you to connect modules to expand the capabilities of the controller. Refer to the installation guide for the model for how to install a particular
expansion module.
28 TCX 850 Installation Guide
Hardware Installation
Powering Up the TCX 850
Before you proceed, be sure the following are correct:
1. Be sure the battery is connected.
2. Be sure the AC power is wired properly. Check to be sure all three
wires have been connected.
3. Be sure the controller has a true earth ground.
4. Be sure you have used the proper cables and wires and correct
lengths.
5. Be sure you have properly labeled the tag with the name of the
controller before removing it.
6. Be sure the Infinet cable has been properly wired.
7. Be sure the Infinet cable shields are properly connected.
If you have completed all previous sections in this manual, you are now
ready to power up the controller.
Turn on the AC power source (or close the power connection) and the
controller starts automatically. The following occurs (also occurs when
you press RESET):
1. If the controller has been off, relays remain off. If you have pressed
RESET, relays de-e nergize.
2. The CPU light flashes every .2 sec after you let go of the button.
3. The TD light immediately starts flashing after you let go of the
button to show data is being transmitted.
4. The RD light begins flashing only if data is being received from
other controllers on the network. This may not happen immediately.
5. If the CPU light flashes ever y . 1 sec, the CPU has failed an internal
test. See the Andover Controls Inf inet Controller Troubles hooting
Guide.
TCX 850 Installation Guide 29
Reset Button
The reset button is the red square button just left of the horizontal center
of the board near the bottom. You press it to initiate a warm start. The
same process that occurs when you power up AC power occurs when
you press RESET.
Setting the Air Flow Potentiometers
Three air flow potentiometers are on the front of the cabinet:
• MIN—Sets the minimum air flow.
• MAX—Sets the ma ximum a ir flow.
• SP—Special. You can program it for any purpose you want, such as
to set the setpoint.
Hardware Instal lation
The controller reads the information from these three pots as Inputs 5,
6, and 7. You set these three inputs manually. They read voltage, from
0 to 5.12 V. You can program them as you choose. (For more information, see the Andover Controls Infinity CX Programmer’s Guide.)
Turn the pots clockwise to increase the voltage.
Turn the pots counterclockwise to decrease the voltage.
Completing the Installation
To complete the installation of your TCX 850 replace the cabinet cover
by snapping the cover onto the board.
Connecting the Andover Controls Service Tool
The SERVICE PORT on the far right side of the bottom of the controller is to connect the Andover Controls Service Tool to the TCX 850.
The service tool wi l l access all Infinet controllers on the same network.
The connector is a 4-pin Berg connector. You need the Andover Controls adaptor cable to connect the Service Tool, which normally plugs
into an RJ 11 (phone) connector.
30 TCX 850 Installation Guide
Hardware Installation
For information on availabi lity of the Andover Controls Ser vic e Tool
and adaptor, contact your Andover Controls representative.
TCX 850 Installation Guide 31
Hardware Instal lation
32 TCX 850 Installation Guide
A
AC power
connecting 11
accuracy
wire gauge factors 7
air flow sensor
connecting 20
Andover Controls Service Tool
using 30
B
backup power
connecting 11
battery
connecting 11
C
cabinet
dimensions 3
cable
for Infinet 3
length 3
circuit requirements for power 3
configuration
planning 8
counter inputs
wiring 18
cover
removing front 9
replacing 30
current sensors
wiring 19
D
dimensions
cabinet 3
E
enclosure
Underwriter Laboratories requirements
5, 9
environments
for operating 5
expansion modules
connecting 28
expansion port
purpose of 28
F
Form A outputs
wiring 27, 28
front cover
removing 9
replacing 30
G
ground
correcting 5
inspecting 5
requirements 4
H
holes
for mounting screws 12
I
Infinet
lightning arrester for 4
Infinet cable
connecting 15
Infinet cable numbers 3
inputs
circuit specifications 6
wiring rules 17
inside controller
parts 12
installation
parts required for 9
L
lightning
protection against 4
lightning arrester
for Infinet 4
TCX 250 Installation Guide Index-1
line transients
protection against 4
M
magnetic field
avoid electrical spikes from 20
mounting
screw holes for 12
O
outputs
equipment requirements 5
wiring 27
wiring rules 17
P
parts
found inside controller 12
required for installation 9
points
air flow inputs 20
counter inputs 18
current inputs 19
thermistor inputs 18
voltage inputs 18
power
battery backup 11
power requirements
circuit 3
power surges
preventing 4
powering up
preparations for 29
protection
against lightning 4
against line transients 4
R
RESET button 30
S
screw holes
for mounting 12
locations for mounting 11
sensors
air flow 20
counter 18
current 19
thermistor 6, 7, 18
voltage 18
service port
purpose of 30
shields
required for sensor wire 16
T
temperatures
for operating 5
thermistors
reducing errors 6
wiring 18
tristate outputs
wiring 27
U
Underwriter Laboratories
enclosure requirements 5, 9
V
varistors
where and when to use 20
voltage sensors
wiring 18
W
wires
gauge for thermistors 7
wiring
AC power connection 11
connecting Infinet cable 15
counter inputs 18
current sensors 19
outputs 27
rules for inputs and outputs 17
thermistors 18
voltage sensors 18
Index-2 TCX 250 Installation Guide
30-3001-173 TCX 850 Installation Guide Rev F
Loading...