iO HVAC CONTROLS Z-2000 Modulating 20 Zone System Installation Guide

Z-2000 Modulating 20 Zone System

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Specifications

• Product: Z-2000 Modulating 20 Zone System

• Compatibility: 2 Heat / 2 Cool conventional or 3 Heat / 2 Cool
  heat pump systems

• Wiring: All low voltage wiring is 18 gauge thermostat wire

• Setup: No computer required for setup, configuration, or
  diagnosis

Product Usage Instructions

Overview

The Z-2000 system controls the system fan and all stages of
heating and cooling. It is designed for compatibility with specific
heating and cooling systems.

Sequence of Operation

The Z-2000 panel is responsible for controlling the system fan
and managing the different stages of heating and cooling. It
operates based on a specific sequence of actions as outlined in the
user manual.

Design and Installation Guidelines

• Zone dampers should not exceed 2 w.c. for applications.

• VAV diffusers should not exceed 0.25 w.c.

• Install zone dampers away from discharge air grills and
  diffusers.

• Use flex duct for the last 5 feet of each branch run.

• Size bypass dampers for 90% of the total system CFM.

• Locate the Z-2000 panel in an accessible location within the
  conditioned space.

Typical Wiring and Layout Guide

Refer to the provided wiring diagram for proper installation of
the Z-2000 system in conjunction with the HVAC unit, bypass damper
system, and other components.

Z-2000 Panel Layout

The Z-2000 panel features various terminals and indicators for
thermostat connections, system power, scheduling clock, discharge
air sensor, economizer, and HVAC system status LEDs. Follow the
user manual for proper setup and configuration of these
components.

Frequently Asked Questions (FAQ)

Q: What systems are compatible with the Z-2000?

A: The Z-2000 is compatible with 2 Heat / 2 Cool conventional or
3 Heat / 2 Cool heat pump systems.

Q: Is a computer required for setting up the Z-2000?

A: No, a computer is not required for setup, configuration, or
diagnosis of the Z-2000 system.

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Installation Guide Version 2001
Z-2000
MODULATING 20 ZONE SYSTEM
Indianapolis, IN 46237

TABLE OF CONTENTS
Overview ……………………………………………………………………………………………………… 3 Sequence of Operation …………………………………………………………………………………… 3
Panel ………………………………………………………………………………………………….. 3 Zone Thermostat ………………………………………………………………………………….. 3 Design and Installation Guidelines ………………………………………………………………… 3,4 Typical Wiring and Layout Guide ………………………………………………………………………. 4 Z-2000 Panel Layout ……………………………………………………………………………………… 5 System Wiring …………………………………………………………………………………………… 6-9 Warning! …………………………………………………………………………………………….. 6 Caution! ……………………………………………………………………………………………… 6 Z-2000 Panel Wiring …………………………………………………………………………… 6,7
System Power ……………………………………………………………………………… 6 HVAC System ……………………………………………………………………………… 6 Discharge Air Sensor ……………………………………………………………………. 6 Night Stat …………………………………………………………………………………… 7 Economizer …………………………………………………………………………………. 7 Heat/Auto/Cool Terminals …………………………………………………………….. 7 Zone Damper Actuator Board …………………………………………………………………… 8 Z-2000-T Zone Thermostat Wiring …………………………………………………………… 8 Optional wiring for electric duct heater or baseboard electric ………………. 9 Panel Setup …………………………………………………………………………………………… 10, 11 Switch Congurations ………………………………………………………………………….. 10 High and Low Limit Settings ………………………………………………………………….. 11 Night Stat Setup and Scheduling ……………………………………………………………….. 11-13 Overview …………………………………………………………………………………………… 11 How It Works ……………………………………………………………………………………… 11 Recommended Setup …………………………………………………………………………… 11 System Switch Settings …………………………………………………………………………. 11 Installer Setup Menu …………………………………………………………………………….. 12 Setting the Clock and Day of Week ………………………………………………………… 12 Daylight Saving Time ………………………………………………………………………….. 12 Programming Events ………………………………………………………………………. 12, 13 Typical 7-Day Schedule ………………………………………………………………………… 13 Zone Thermostat Setup ……………………………………………………………………………. 14-18 Switch Functions ………………………………………………………………………………… 14 Key Functions ……………………………………………………………………………………. 14 Entering Setup Menu ………………………………………………………………………….. 15 Setting the Minimum Damper Position ……………………………………………………. 15 Setting the Maximum Damper Position ……………………………………………………. 15 Setting the Unit Number ………………………………………………………………………. 15 Setting a Zone Number ……………………………………………………………………….. 16 Setting the Heating Limit ……………………………………………………………………… 16 Setting the Cooling Limit ……………………………………………………………………… 16 Setting the Actuator Speed ……………………………………………………………………. 16 Setting the Modbus Address ………………………………………………………………….. 17 Temperature Calibration Offset ……………………………………………………………… 17 Saving Settings and Exiting the Setup Menu …………………………………………….. 17
1

TABLE OF CONTENTS
Advanced Functions ………………………………………………………………………………………. 17, 18 Damper Position Override ……………………………………………………………………….. 17 Override to Open ………………………………………………………………………………….. 18 Override to Close ………………………………………………………………………………….. 18 Cancelling the Damper Override ………………………………………………………………. 18
Checking Thermostat Status Points ……………………………………………………………………… 18 Unit Number …………………………………………………………………………………………. 18 Zone Number ……………………………………………………………………………………….. 18 Duct Temperature …………………………………………………………………………………… 18 Damper Position …………………………………………………………………………………….. 18
System Status LED Denitions and Functions ………………………………………………………………….. 19 Z-2000 Panel …………………………………………………………………………………………………… 19 Actuator Board …………………………………………………………………………………………………. 19
Z-2000 Panel Time Delays …………………………………………………………………………………………… 19 Staging and Limit Control ……………………………………………………………………………………………. 20
2

OVERVIEW
The Z-2000 (Version 2001) is a commercial, modulating forced air zone control system that allows a single HVAC unit to have up to 20 individual zones. Each zone is controlled by a proprietary space thermostat that wires to a factory mounted actuator board located on a master damper or diffuser serving the zone. The actuator board also wires back to the Z-2000 logic panel which receives calls from each zone thermostat for either heating or cooling and controls the HVAC equipment based on a selected control sequence conguration.
The Z-2000 is compatible with 2 Heat / 2 Cool conventional or 3 Heat / 2 Cool heat pump systems. All low voltage wiring is 18 gauge thermostat wire and no computer is required to setup, congure or diagnose the system.
SEQUENCE OF OPERATION
Z-2000 Panel: The Z-2000 controls the system fan and all stages of heating and cooling. During the
occupied mode, the fan runs continuously. As calls for heating or cooling are received from the individual zone thermostats, the zone control panel establishes the equipment mode of operation based on a selectable Majority Wins or Cooling Priority control algorithm. In addition, the panel is equipped with Minimum Call selector switches designed to prevent the equipment from coming on until a minimum number of calling zones is reached. This feature helps prevent short equipment run times and minimizes high or low limit trip- out when only a few zones are calling. Refer to the Panel Setup and Scheduling section for conguration guidelines. Z-2000-T Zone Thermostat:
The Z-2000-T zone thermostat is an integral part of the Z-2000 zoning system. The thermostat not only signals the panel when the zone requires heating or cooling, but also controls the damper or diffuser serving the zone. The Z-2000-T is a single setpoint thermostat and sends a signal to the Z-2000 panel for heating or cooling when the temperature in the zone deviates 1.5° F above or below the setpoint. The thermostat can be congured for modulating or two-position damper control and interfaces with a duct sensor mounted in the master damper or diffuser to determine if the discharge air is usable for the call. If the discharge air temperature at the damper is warmer than 72° F, the thermostat will open the damper on a call for heating. If the discharge air temperature at the damper is below 72° F, the thermostat will open the damper on call for cooling. Refer to the Zone Thermostat Setup section for conguration guidelines.
DESIGN AND INSTALLATION GUIDELINES
[ ] Extra consideration should be given when applying any zone control system to a building that requires large amounts of cooling in the core zones during cold weather. Consider adding auxiliary heat to external zones or using one system for the core zones and one system for the external zones. [ ] It is recommended that the system installation be limited to 25 tons of cooling capacity. Rooftop units with economizers and relief dampers are strongly recommended for building with core cooling loads. [ ] Using zoning with oversized HVAC equipment is not recommended. This can cause short equipment run times and humidity problems. [ ] Multi-stage equipment is recommended with zone control systems. [ ] The pressure drop through zone dampers is negligible and not a factor when sizing branch runs.
3

DESIGN AND INSTALLATION GUIDELINES
[ ] Zone dampers are rated for applications not exceeding 2″ w.c. VAV diffusers should not exceed 0.25″ w.c.
[ ] Zone dampers should be installed as far back from discharge air grills and diffusers. Flex duct should be used for the last 5 feet of each branch run. [ ] Bypass dampers should be sized for 90% of the total system CFM. [ ] The Z-2000 panel should be located in an accessible location in the conditioned space and never mounted inside the rooftop unit. [ ] The Z-2000 system requires a separate 24VAC, 75VA transformer that provides power to the
TYPICAL WIRING AND LAYOUT GUIDE
HVAC UNIT

8
HEAT/COOL OR
HEAT PUMP

3
Z-2000-NS NIGHT STAT

120/208/240/480 VAC

BYPASS DAMPER SYSTEM DUCTED RETURN
RETURN

SUPPLY

24VAC

STATIC PRESSURE CONTROL

BYPASS ACTUATOR

STATIC PRESSURE
PROBE
PRESSURE TUBING
4

BYPASS DAMPER SYSTEM OPEN RETURN

RETURN

SUPPLY

STATIC PRESSURE
PROBE

CEILING

24VAC
PRESSURE TUBING
BYPASS ACTUATOR
STATIC PRESSURE CONTROL

Z-2000 PANEL LAYOUT
3

26

4 AMP

4 AMP

4

25

OFF ON

SETUP

1 2 3 4 5 6

MAJORITY COOLING PRIORITY

HC

HP

SYSTEM

O

B REV VALVE

OFF 3 ZONES MIN

OFF 2 ZONES CALLS

OFF

ON

E HEAT

5

44

160

42

46

23

40

48

LOW LIMIT

150

170

24

140

175

HIGH LIMIT

1

22

21 20 19 18 17 6
16 7
8

15

9

10
W3/AUX/EH

2

2 AMP

2 AMP

.. REMOVE JUMPER FOR RH – RC

2 AMP

14 1. Zone 1-12 Thermostat Terminals with Heat/Cool LED Indication 2. Cool/Auto/Heat Terminals 3. 4 AMP System Power Fuse 4. 24VAC System Power Terminals (Input) 5. Zone 13-20 Thermostat Terminals with Heat/Cool LED Indication 6. Scheduling Clock Terminals 7. 24VAC Clock Power Terminals (Output) 8. Discharge Air Sensor Terminals 9. Economizer Terminals

13

12

11

10. HVAC System Terminals 11. 2 AMP RC Fuse 12. RH/RC Jumper 13. 2 AMP RH Fuse 14. 2 AMP Spare Fuse 15. HVAC System Status LEDs 16. Occupied LED 17. System Status LED

5

18. Heat Status LED 19. Cool Status LED 20. Discharge Air Sensor LED 21. Speed UP Mode LED 22. Speed UP Mode Button 23. Low Limit Adjustment 24. High Limit Adjustment 25. System Conguration Switches 26. 4 AMP Spare Power Fuse

SYSTEM WIRING
WARNING! 1. Turn power off to HVAC equipment and control panel during installation to prevent serious injury from electrical shock and/or damage to the system. 2. Use extreme care when making duct openings and handling sheet metal to avoid injury. 3. Install all components in a manner that provides easy access for test, check and startup. CAUTION! 1. Installation of this system must be in compliance with all applicable codes. 2. HVAC system must be properly sized and balanced to assure optimum system performance. 3. An electronic bypass damper or VFD (Variable Frequency Drive) must be installed to maintain proper system static pressure. 4. All low voltage wire must be 18 gauge. 5. All wiring should be color coded and tagged for proper identication. Z-2000 PANEL WIRING System Power 1. Wire a 24VAC, 75VA transformer to the 24VAC R’ andC’ terminals on the Z-2000 panel.

24VAC

120/208/240/480 VAC

HVAC System

TR-75 TRANSFORMER

2. Wire the HVAC equipment to the HVAC SYSTEM terminals on the Z-2000 panel.

CONVENTIONAL HEAT/COOL SYSTEM
HEAT PUMP SYSTEM

C

C

DO NOT WIRE EQUIPMENT COMMON TO PANEL

Discharge Air Sensor 3. Mount the Z-2000-DAS Discharge Air Sensor in the main supply plenum as far down stream from the evaporator coil but prior to any duct transitions and dampers. Wire the discharge air sensor to the DAS terminals on the Z-2000 panel.

Z-2000-DAS
6

SYSTEM WIRING
Night Stat 4. Remove the factory jumper on the Z-2000 panel from the NS CLOCK CONTACT terminals. Wire the Z-2000-NS Night Stat as shown in the wiring diagram. The Z-2000-NS Night Stat should be located in an area that represents the general load characteristics of the building. If the thermostat is located in an equipment room, a remote sensor may be required. In applications where 24 hour occupancy exists, a night stat may not be necessary.

NOT USED

Optional Z-2000-S1
Remote Sensor Terminals

Z-2000-NS NIGHT STAT

BATTERY COMPARTMENT

MOUNTING HOLES

WIRE ACCESS
HOLE

W2 MOUNTING

S2 SC S1 AUX AUX O/B

HOLE

MOUNTING HOLES
Y1 Y2 W1 G R C

Economizer If the HVAC unit has an economizer, the auxiliary contacts on the Z-2000-NS Night Stat can be used with the ECONO contacts on the Z-2000 panel so that the economizer is only energized during the occupied period. Wire the Night Stat as illustrated above and the ECONO terminals as illustrated below. Refer to the Z-2000-NS Installation Manual on assigning the auxiliary contacts.
Z-2000-NS NIGHT STAT

BATTERY COMPARTMENT

MOUNTING HOLES

WIRE ACCESS
HOLE

W2 MOUNTING

S2 SC S1 AUX AUX O/B

HOLE

MOUNTING HOLES
Y1 Y2 W1 G R C

TO ECONOMIZER
Heat/Auto/Cool Terminals The Z-2000 panel has a set of terminals that can be used to place the panel in heating only, cooling only or auto changeover mode. A simple jumper wire can be placed between the COM and H for heat only or, COM and C for cool only mode. If a jumper is not used, the panel is in Auto Changeover. The terminals can also be used with a 3-position selector switch for remote applications.

AUTO CHANGEOVER

HEAT ONLY

COOL ONLY

JUMPER

JUMPER

7

SYSTEM WIRING

Zone Damper Actuator Board Each master zone damper has an actuator board mounted to the side of the damper motor or diffuser. Run 4-wire cable from the Z-2000 panel to each zone actuator board as illustrated.

ACTUATOR BOARD

DAMPER OR DIFFUSER MOTOR

2001AB Rev2 PO

PC

THERMOSTAT

W

HEAT

R

FACTORY WIRING

C

PO

0

DAMPER

DS

PC

FP45-MOTOR

DS

C

1

Y

DS

45in-lb/5Nm 24VAC/DC

1 Comm 2 Close

C

DS

90S 2.5 VA 1.5W

3 Open

R

R

COOL

Y

W 1 2 3

Z-2000 PANEL

Z-2000-T Zone Thermostat Wiring Each Z-2000-T zone thermostat wires to its master zone damper actuator board. Run 8-wire cable from the thermostat subbase terminals to the actuator board as illustrated.

Z-2000-T
AUTO CHANGEOVER SPACE THERMOSTAT

PO DAMPER OPEN (24VAC) PO

PC DAMPER CLOSED (24VAC) PC

W CALL FOR HEAT (24VAC) W

R 24VAC POWER (HOT) R

C 24VAC POWER (COMMON) C

DS DUCT SENSOR

DS

DS DUCT SENSOR

DS

Y CALL FOR COOL (24VAC) Y

TO Z-2000 PANEL

C
FACTORY R JUMPER R
Y
W

THERMOSTAT

ACTUATOR BOARD
2001AB Rev2

DAMPER OR DIFFUSER MOTOR

HEAT

DAMPER

FACTORY WIRING
PO PC C DS DS

0
FP45-MOTOR

1

45in-lb/5Nm 24VAC/DC
90S 2.5 VA 1.5W

1 Comm 2 Close 3 Open

COOL

1 2 3

WIRE TO

DUCT SENSOR (10K OHMS @77°)

OPTIONAL AUXILIARY DAMPERS

8

(UP TO 12 MAY BE WIRED IN PARALLEL)

SYSTEM WIRING
ZONE THERMOSTAT WIRING WITH ELECTRIC DUCT HEATER OR BASEBOARD ELECTRIC Z-2000-T with Electric Duct Heater There are two wiring options when using an electric duct heater in a zone. Option1. A DPDT relay can be used to bring on the electric heat and drive the damper open without relocating the duct sensor. A 15K Ohm resistor must be wired to one side of the relay contact so that when the relay is energized, the resistor will be in parallel with the duct sensor. This will change the ohms value, translating to a higher duct temperature which will drive the damper open. Option 2. The duct sensor can be relocated after the electric duct heater. A SPDT relay with a 24 volt coil can be applied and the coil wired to terminals C and W on the actuator board. The relay contacts are wired in series with the duct heater terminals.

Z-2000-T
AUTO CHANGEOVER SPACE THERMOSTAT

PO DAMPER OPEN (24VAC) PO

PC DAMPER CLOSED (24VAC) PC

W CALL FOR HEAT (24VAC) W

R 24VAC POWER (HOT) R

C 24VAC POWER (COMMON) C

DS

DUCT SENSOR

DS

DS

DUCT SENSOR

DS

Y CALL FOR COOL (24VAC) Y

C R FACTORY JUMPER R Y W

THERMOSTAT

ACTUATOR BOARD
2001AB Rev2
HEAT
PO PC C DS DS
COOL

DAMPER

DAMPER OR DIFFUSER MOTOR

0
FP45-MOTOR

1

45in-lb/5Nm 24VAC/DC
90S 2.5 VA 1.5W

1 Comm 2 Close 3 Open

1 2 3

C R
WIRE TO THERMOSTAT W TERMINAL WIRE TO THERMOSTAT C TERMINAL

OPTION 1
24 V COIL
RY2 RELAY

REMOVE FACTORY JUMPER WIRE TO W TERMINAL WIRE TO R TERMINAL

OPTION 2

24 V COIL

RY1 RELAY

NC C NO NC C NO

DUCT SENSOR (10K OHMS @77°)
WIRE TO DS TERMINAL WIRE TO DS TERMINAL 15K Ohm Resistor
WIRE TO DUCT HEATER COIL
WIRE TO DUCT HEATER COIL

NC C NO

Z-2000-T with Electric Baseboard Heat Option 2 above would apply for electric baseboard heat with the exception that the duct sensor would not have to be relocated. The contact rating of the relay must be determined for the specic electric baseboard application.
9

PANEL SETUP

The Z-2000 panel has a row of slide switches that are used to congure the panel for the specic equipment application along with other options. Switch denitions are as follows:

OFF ON

SETUP

1 2 3 4 5 6

MAJORITY COOLING PRIORITY

HC

HP

SYSTEM

O

B REV VALVE

OFF 3 ZONES MIN

Switch 1 – Priority:

OFF 2 ZONES CALLS

OFF

ON

E HEAT

OFF = Majority

When the Priority switch is placed in the OFF position, the panel treat calls for heating and

cooling based on a Majority Wins control algorithm. This means that the panel will energize

the equipment in the mode that represents the greatest number of calls. In the event of a tie,

cooling will receive priority.

ON = Cooling

When the Priority switch is placed in the ON position, the panel gives priority to any cooling

call regardless how many heating calls are taking place.

Switch 2 – System:

OFF = HC

When the System switch is placed in the OFF position, the panel is congured for

conventional heating/cooling systems with up to 2 stages of heat and 2 stages of cooling.

ON = HP

When the Priority switch is placed in the ON position, the panel is congured for heat pump

systems with up to 3 stage heat / 2 stage cool.

Switch 3 – Rev Valve: (Applies to heat pump operation only)

OFF = O

In heat pump conguration, when the Rev Valve switch is OFF, the reversing valve will

energize on a call for cooling.

ON = B

In heat pump conguration, when the Rev Valve switch is ON, the reversing valve will

energize on a call for heating.

Switch 4 and 5 – Min Call:

4 OFF and 5 OFF = No Minimum Call Requirement

When both Min Call switches are OFF, any single zone can initiate an equipment call.

4 ON and 5 OFF = 2 Zones

When switch 4 is ON and switch 5 is OFF, at least two zones must be calling in the same

mode before the panel will energize the equipment.

4 OFF and 5 ON = 3 Zones

When switch 4 is OFF and switch 5 is ON, at least three zones must be calling in the same

mode before the panel will energize the equipment.

4 ON and 4 ON = 5 Zones

When both switch 4 and 5 are ON, at least ve zones must be calling in the same mode

before the panel will energize the equipment.

Switch 6 – E Heat (Applies to heat pump operation only)

OFF = No Emergency Heat

When switch 6 is OFF, the panel uses the compressor(s) and auxiliary heat for normal

heating

calls.

ON = Emergency Heat

10

PANEL SETUP

High and Low Limit Settings The panel has adjustable High and Low Limit potentiometers. When the low or high limit discharge air setpoint is reached, the panel will lock out the equipment while maintaining fan operation and initiate a time delay before the equipment is allowed to come back on. In conventional heating and cooling conguration, the time delay only applies to the cooling cycle. In heat pump conguration, the time delay applies to both heating and cooling.

44

160

42

46

150

170

40

48

LOW LIMIT

140

175

HIGH LIMIT

NIGHT STAT SETUP AND SCHEDULING

OVERVIEW: The Z-2000-NS programmable touchscreen thermostat can be used for occupied and unoccupied scheduling of the Z-2000 panel. When wired and configured properly, the thermostat takes the place of a separate 7-day clock, night stat and override timer. The Z-2000-NS Programmable Fan option is used to trigger the G’ fan relay to open or close the Clock ContactNS’ terminals on the Z-2000 panel that places the system in the occupied or unoccupied mode of operation. The thermostat can also be used with a Z-2000-S1 Indoor Remote Sensor. 24 volt power to the thermostat is supplied by the Z-2000 panel through dedicated Clock Power terminals R’ andC’. The thermostat also has battery backup to maintain the real-time clock in the event of a power failure. The thermostat can be configured to provide 7-day scheduling with 2 or 4 events per day. For commercial schedules, 2 events per day is typical. HOW IT WORKS: The Z-2000-NS does not control the HVAC equipment and only uses the `G’ fan relay to set the Z-2000 panel in either the occupied or unoccupied mode. This is accomplished by using the Programmable Fan option so that the fan relay is energized during occupied mode (Always On) and de-energized during unoccupied mode (Automatic). When in Automatic mode, the fan relay will only energize when the temperature falls below or rises above the programmed unoccupied heating and cooling setpoints. RECOMMENDED SETUP: Refer to the Installation Instructions to configure the thermostat. Leave all other setup menu items not shown below in factory default. SYSTEM SWITCH SETTINGS: The Z-2000-NS contains a set of four system switches located on the thermostat printed circuit board. Make sure the system switches are set as follows:
Sw 1 = OFF Sw 2 = ON Sw 3 = OFF Sw 4 = OFF

11

NIGHT STAT SETUP AND SCHEDULING

INSTALLER SETUP MENU CHANGES: After the thermostat is powered up, touch and hold both the Clock and Mode section for 5 second to enter the Installer Menu. Touch Next to advance forward through the menu or touch Back to backup.

REQUIRED MENU CHANGES:

02= 2 04 = 1

(Program Schedules) (Programmable Fan)

DAYLIGHT SAVING TIME: The Z-2000-NS default setting compensates for Daylight Saving Time. In areas of the country where DST is not observed, the feature can be disabled by entering Installer Menu 30. Touch the UP or DOWN arrows to change the selection to 0.

After the changes have been made, touch and hold Next until the thermostat exits the Installer menu. All changes will be stored in non-volitile memory.

SETTING THE CLOCK AND DAY OF WEEK: It is important that the time of day and day of the week is set properly so that occupied and unoccupied programs start on time.

1. Touch the Clock until the hour flashes. Tap the UP or DOWN arrow to select the hour. Note: Make sure hour is correctly set for AM or PM.

2. Touch Clock again and the minutes will flash. Tap the UP or DOWN arrow to select the correct minutes.

3. Touch Clock again and month will flash. Tap the UP or Down arrow to select the correct month.

4. Touch Clock again and the day will flash. Tap the UP or Down arrow to select the day of the month.

5. Touch Clock again and the year will flash. Tap the UP or Down arrow to select the year.

6. To exit the menu, touch Clock again. The proper day of the week will automatically be displayed with the clock and calendar.

PROGRAMMING EVENTS: When the thermostat is configured to provide 2 schedules per day (Occupied/Unoccupied), 7 day per week, each event is displayed on the LCD as DAY (Occupied) and NIGHT (Unoccupied).

1. Touch Program until Mon (Monday) flashes.

2. Tap Program again until the hour flashes and Day is displayed on the LCD. Use the UP or DOWN arrow to set the hour start time. Note: Make sure hour is correctly set for AM or PM.

12

NIGHT STAT SETUP AND SCHEDULING

3. Tap Program again until the minutes flash. Use the UP or DOWN arrow to set the minutes. 4. Tap Program again and the heating setpoint will flash. Leave the setpoint at the factory default. 5. Tap Program again and the cooling setpoint will flash. Leave the setpoint at the factory default. 6. Tap Program again and the fan option Automatic will flash. Use the UP or DOWN arrow to set the
fan option to Always On. 7. Tap Program again until the hour flashes and Night is displayed on the LCD. Use the UP or
DOWN arrow to set the hour start time. Note: Make sure hour is correctly set for AM or PM. 8. Tap Program again until the minutes flash. Use the UP or DOWN arrow to set the minutes. 9. Tap Program again and the cooling setpoint will flash. You can use the UP or DOWN arrow to
change the cooling setpoint or use the factory default of 82 degrees. 10. Tap Program again and the heating setpoint will flash. You can use the UP or DOWN arrow to
change the heating setpoint or use the factory default of 60 degrees. 11. Tap Program again and the fan option Automatic will flash. Leave fan option set to
Automatic. 12. Tap Program again and CPY (Copy) will appear on the LCD. If you wish to copy the Monday
program to additional days of the week, use the UP or DOWN arrow to add additional days. Example: Mon Tue Wed Thu Fri 13. Once you have selected the days to be copied, touch Program. CPY will begin to flash and then the next programming day will flash. Example: If you copy the Monday schedule through Friday, Sat (Saturday) will flash. Simply repeat the programming steps for any day where the building will be unoccupied. The only required change is that both the Day and Night fan option should be set to Automatic and the heating and cooling setpoints for Day should reflect the unoccupied setpoints for Night. 14. Once programming is completed, make sure the thermostat is set in the Auto mode of operation. 15. Make sure the 2 AA batteries are installed in the thermostat even though it will be powered by
24 VAC. In the event of a power failure, the batteries will maintain the real time of day. Batteries should be replaced once a year or whenever the low battery symbol appears on the LCD.

TYPICAL 7-DAY SCHEDULE HAVING 2 EVENTS PER DAY WITH SATURDAY/SUNDAY UNOCCUPIED

PROGRAM DAYS

SCHEDULE START TIME

HEAT

COOL

SETPOINT SETPOINT

FAN MODE

MON THRU
FRI
SAT AND SUNDAY

DAY NIGHT DAY NIGHT

7:00 AM 5:00 PM 7:00 PM

70

75

FACTORY DEFAULT FACTORY DEFAULT

ALWAYS ON

62

78

FACTORY DEFAULT FACTORY DEFAULT

AUTOMATIC

62

78

AUTOMATIC

5:00 PM

62

78

FACTORY DEFAULT FACTORY DEFAULT

AUTOMATIC

13

ZONE THERMOSTAT SETUP
SWITCH FUNCTIONS The Z-2000-T contains a set of dip switches numbered 1 through 8. Only dip switches 1, 2, 3, 6 and 7 are active.

FACTORY DEFAULT SETTING FOR ALL SWITCHES IF OFF

ON 1 2 3 4 5 6 7 8

…… ….
AB CD EF
Switch 1 – Switch 1 is used to lock the thermostat after setup is completed. When the thermostat is locked (ON position) a padlock icon will show on the LCD. When locked, only setpoint changes and status functions can be accessed by the user. Do not set Switch 1 in the ON position until all setup functions are completed. Switch 2 – Switch 2 is used to display the space temperature, duct temperature and setpoint in Celsius (ON position) or Fahrenheit (OFF position). Select Celsius or Fahrenheit before proceeding to the thermostat setup menu. Switch 3 – Switch 3 is used to select two-position (ON position) or fully modulating (OFF position) damper control to best suit the specific application requirement. Switch 6 – When switch 6 is ON, Heat or Cool are not displayed. Switch 7 – When switch 7 is ON, the space temperature is replaced by the setpoint.
KEY FUNCTIONS A = ON/OFF KEY – When the Z-2000-T is not locked, this key allows the thermostat to be turned ON or OFF. When in the OFF position, the damper is also driven closed. B = STATUS KEY – Pressing the STATUS key repeatedly scrolls through the UNIT number, ZONE number, DUCT temperature and DAMPER position. C and D = UP and DOWN KEYS – Used to increase and decrease the setpoint, as well as change thermostat setup values. E = SETUP KEY – Used to toggle through the thermostat setup menu. F = ENTER KEY – Used to enter changes as well as exit the setup menu.
14

ZONE THERMOSTAT SETUP
ENTERING THE SETUP MENU Press and hold the SETUP key until the word DAMPER appears on the LCD. (Figure 1)

FIGURE 1

FIGURE 2

SETTING THE MINIMUM DAMPER POSITION Press the SETUP key again and the LCD will display the minimum damper position. The factory

default is 10% which means the damper is driven 90% closed after a heating or cooling call is

satisfied. Press the UP and DOWN keys to change the minimum damper position. Position may be

adjusted in 10% increments. (Figure 2)

FIGURE 3

FIGURE 4

SETTING THE MAXIMUM DAMPER POSITION Press the SETUP key again and the LCD will display the maximum damper position for heating and cooling. The factory default is 100% which means the damper can drive fully open with a call for heating or cooling. Position may be adjusted in 10% increments using the UP and DOWN keys. (Figure 3)

SETTING A UNIT NUMBER Press the SETUP key again and the LCD will display the word UNIT. The factory default is 00. This number can be used to assign the Z-2000-T to a particular HVAC unit. Use the UP and DOWN keys to assign a UNIT number from 00 to 99. (Figure 4)
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ZONE THERMOSTAT SETUP
SETTING A ZONE NUMBER Press the SETUP key again and the LCD will display the word ZONE. The factory default is 00. This number can be used to identify each Z-2000-T thermostat wired to a Z-2000TM zone control panel or when used in multiple stand-alone applications. Use the UP and DOWN keys to assign a ZONE number from 00 to 99. (Figure 5)

FIGURE 5

FIGURE 6

SETTING THE HEATING LIMIT Press the SETUP key again and the LCD will display the heating limit. The factory default is 76° F.

Press the UP and DOWN keys to change the heating limit setting. It is strongly recommended that

the limit not be set above the factory default setting. (Figure 6)

SETTING THE CFIOGUORLEIN7 G LIMIT

FIGURE 8

Press the SETUP key again and the LCD will display the cooling limit. The factory default is 68° F.

Press the UP and DOWN keys to change the cooling limit setting. It is strongly recommended that

the limit not be set below the factory default setting. (Figure 7)

SETTING THE ACTUATOR SPEED Press the SETUP key again and the LCD will display the actuator speed. The factory default is 90 seconds which is the time it takes the actuator to drive the damper blade fully open or fully closed. This is a critical step in the Z-2000-T setup since the thermostat can be used with a variety of 24 Volt actuators. If you are unsure of the actuator speed, place the actuator in the fully closed position and then apply 24 Volts to common and normally open. The time it takes to drive the damper blade fully open equals the actuator speed setting. (Figure 8)
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ZONE THERMOSTAT SETUP
SETTING THE MODBUS ADDRESS Press the SETUP key again and the LCD will display the Modbus communications address. The factory default is 01. The Z-2000-T has integrated Modbus communications capability for remote monitoring and control. For more information on Modus Communications, contact iO HVAC controls.

FIGURE 9
TEMPERATURE CALIBRATION OFFSET

FIGURE 10

SENSOR LOCATION

Press the SETUP key again and the LCD will display the temperature calibration offset. The factory

default setting is 0. Typically, it is not necessary to adjust the temperature calibration offset, as the

Z-2000-T has been factory calibrated. If calibration is necessary, a high quality electronic digital

thermometer must be used. Place the thermometer sensor probe next to the thermostat sensor and

allow five minutes before comparing the temperature readings. Use the UP and DOWN keys to

adjust the temperature calibration. The range is +/- 9° F.

(Figure 10)

SAVING SETTINGS AND EXITING THE SETUP MENU Press the ENTER key and the Z-2000-T will save the setup menu settings and exit the program. The LCD will display the space temperature along with other normal operating functions. To review the thermostat settings, simply press and hold the SETUP key until the setup menu is displayed and then toggle through the settings. Press the ENTER key to exit the setup menu.

ADVANCED FUNCTIONS
DAMPER POSITION OVERRIDE The Z-2000-T has a damper position override feature to assist in air balancing and bypass damper setup. With the thermostat unlocked, press twice and hold the SETUP key until the word DAMPER appears on the LCD.(Figure 11)

FIGURE 11
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ZONE THERMOSTAT SETUP
OVERRIDE TO OPEN Press the UP or DOWN key until the word OPEN appears on the LCD and then press the ENTER key. The damper will drive open and remain in the open position until the override is cancelled. (Figure 12)

FIGURE 12

FIGURE 13

OVERRIDE TO CLOSE Press the UP or DOWN key until the word CLOSED appears on the LCD and press the ENTER key. The damper will drive closed and remain in the closed position until the override is cancelled. (Figure 13)

CANCELLING THE DAMPER OVERRIDE In order for the Z-2000-T to return to normal operation, the override must be cancelled. Press and hold the SETUP key until the word DAMPER OPEN or DAMPER CLOSE appears on the LCD. Use the UP or DOWN key until only the word DAMPER is displayed and then press the ENTER key. The thermostat will then resume normal operation. (Figure 14)

CHECKING THERMOSTAT STATUS POINTS

FIGURE 14

When the thermostat is first powered, it goes through a synchronization process to confirm the

damper position before becoming operational, after which status points can be checked by

repeatedly pressing the STATUS key and toggling through the following:

UNIT – Displays the HVAC unit number assigned to thermostat.

ZONE – Displays the thermostat zone number.

DUCT – Displays the duct temperature.

DAMPER – Displays the damper position in one degree increments.

(0% = fully closed and 100% = fully open)

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SYSTEM LED STATUS DEFINITIONS

Z-2000 LED FUNCTION

COLOR

STATUS

Zones (1-20)
Time Delay Speed Up Mode DAS Active COOL

Red Green
Red Green Green

HEAT

Red

OCCUPIED O/B G Y1 Y2 W1 W2 W3/AUX/EH

Green Green Green Green Green Green Green Green

ACTUATOR BOARD LED FUNCTION

HEAT

Red

ON when there is a heating call. ON when there is a cooling call. OFF in normal mode. Blinks in speedup mode. Manual ON/OFF button with 10 minute auto- reset. On when DAS is connected. ON when system is in cooling mode. Blinks when system down-stages or goes out on cooling limit. ON when system is in heating mode. Blinks when system down-stages or goes out on heating limit. On when system is in occupied mode. OFF during unoccupied mode. ON when reversing valve is energized. ON constantly during occupied mode and for 5 minutes after panel goes unoccupied. ON with 1st stage cooling or compressor. ON with 2nd stage cooling or compressor. ON with 1st stage heating. ON with 2nd stage heating. ON with 3rd stage auxiliary heat or E. Heat. ON when space temperature drops 1.5° F below setpoint sending signal to Z-2000 panel.

COOL

Green

Z-2000 PANEL TIME DELAYS

ON when space temperature rises 1.5° F above setpoint sending signal to Z-2000 panel.

FUNCTION MINIMUM TIME IN HEAT OR COOL MODE Once system is in the heat or cool mode, it will remain there for a minimum of 15 minutes. The equipment may or may not be on during this period. MINIMUM CHANGEOVER TIME BETWEEN HEAT OR COOL CALL UPSTAGE TIMING MINIMUM ON/OFF TIME FAN RUN TIME AFTER CLOCK CONTACTS OPEN

NORMAL MODE 15 MIN
5 MIN 10 MIN
5 MIN 5 MIN

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SPEEDUP MODE 60 SEC
20 SEC 40 SEC 20 SEC 20 SEC

STAGING AND LIMIT CONTROL SEQUENCE
Discharge Air Temperature Setpoints for Conventional Heating Any time the discharge air temperature goes above the adjustable high limit setting of 145° F to 175° F, stage 1 heat will drop out. Any time the discharge air temperature drops below 135° F, stage 1 heat will come on. Any time the discharge air temperature goes above 125° F, stage 2 heat will drop out. Any time the discharge air temperature drops below 115° F, stage 2 heat will come on. Discharge Air Temperature Heating Setpoints for Heat Pump Mode Only Any time the discharge air temperature goes above 110° F, stage 1 will drop out. Any time the discharge air temperature drops below 105° F, stage 1 will come on. Any time the discharge air temperature goes above 100° F, stage 2 will drop out. Any time the discharge air temperature drops below 95° F, stage 2 will come on. Any time the discharge air temperature goes above 120° F, stage 3 will drop out. Any time the discharge air temperature drops below 115° F, stage 3 will come on. When stage 3 is energized, heat pump stage 1 and 2 are locked on and their limits ignored. When the discharge air temperature goes above 120° F, stage 3 is drops out and a 2 minute time delay is initiated before stage 1 and 2 limits are activated. Discharge Air Temperature Setpoints for Conventional Cooling and Heat Pump Any time the discharge air temperature drops below the adjustable low limit of 40° F to 48° F, stage 1 cooling will drop out. Any time the discharge air temperature goes above 53° F, stage 1 cooling will come on. Any time the discharge air temperature drops below 52° F, stage 2 cooling will drop out. Any time the discharge air temperature goes above 57° F, stage 2 cooling will come on.

www.iohvaccontrols.com For Technical Support Call Toll Free: 866-225-5032

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iO-06-1402-062724

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