Trane MUA-SVP01A-EN User Manual

Controls Programming Guide

Direct-Fired Indoor and Outdoor Make-Up Air Units

DFIA DFOA

January 2007 MUA-SVP01A-EN

Overview

A glossary has been provided to assist the reader in understanding distinctive terms and phrases. These terms and phrases appear in italics.

Trane's Digital Control System, AdaptAire, is designed to give the user the ultimate in unit performance and operational flexibility, adaptability, and reliability in a user-friendly package. The AdaptAire DDC system is a standard component on Trane heating and cooling units. Non-recirculating units,

equipped with the AdaptAire system, do not have return air capabilities, and all functions related to recirculating units are not relevant. Where a function is similar but different between recirculating and

non-recirculating units, the function is explained separately. AdaptAire accepts single or multiple units on the system network. Each unit can

be provided with a local user interface. The operating parameters for individual units may be input through the local interface. A PC may also be connected to the network. This allows the user to configure eac h unit separately, or all units can be configured simultaneously. A controls contractor can provide assistance in networking.

Operational modes include time scheduling, filter monitoring, and multiple damper control and temperature control schemes. All of these modes provide the maximum in unit operational flexibility.

The optional airflow station imparts unparalleled adaptability into the operation of each unit. A daily self-calibration enables AdaptAire to detect the total air volume and the exact ratio of outside and return air entering the unit. Then AdaptAire daily fine-tunes the unit's operation based on these new parameters. Air volume can vary because of changes in static pressure conditions due to loading filters, VAV boxes, and building dynamics. These varying conditions influence the ventilation air provided by the unit. On certain models of recirculating direct-fired heaters this impacts the allowable equivalent temperature rise of the unit that is allowed under the latest ANSI standard for direct-fired heaters.

AdaptAire diagnostic capabilities insure swift response to abnormal unit conditions. A fault is generated anytime the operational parameters and actual unit operation are at odds. An indication of trouble is displayed at the local user interface and system PC in text format. In the Diagnostics section of this manual is a list of all faults and possible causes and solutions.

All of the features of the AdaptAire system are designed to provide the user with real time information. At any time the user can display all of th e o per at io n al parameters, make changes, if necessary, and observe the various temperature, pressure, and damper readings. The system's diagnostic capa bilit ies provide the user with up to the minute status reporting. (BACview service module or WebCTRL internet connection is required for these features.)

NETWORKING

AdaptAire is adaptable to a variety of different network architectures and protocols. Each controlle r h as built-in pr otocol t ran slation a nd ca n be conf ig ured for operation on ARCnet156 or EIA-485 communication networks. See Appendix IV for specific controller specifications.

The AdaptAire system can be connected to most existing building automation systems. Some systems may require the use of special controllers and network communication devices. See Appendix I for Device Parameters and Cache Setup information.

ADAPTAIRE DEFAULT SETTINGS

The following is a list of AdaptAire DDC controller defaults. These are the def ault operating parameters set at the factory prior to shipment.

Table 1. Default settings

ITEM DEFAULT RANGE

Unit Network Address 002 binary dips 000 – 255 binary dips

Unit Operating Mode OFF OFF – MANUAL - AUTO Time Clock Schedule None 4 Daily - 12 Holiday - 2

Heating/Cooling Operating

Mode

Damper Operating Mode Manual MANUAL - BUILDING

Fuel Selection Natural Gas NATURAL - PROPANE Heating Night Setback 55°F 40°F - 80°F Cooling Night Setback 100°F 75°F - 120°F

Room Temperature Setpoint 65°F 55°F - 90°F

Freezestat 45°F 35°F - 50°F

Outside Air Economizer

Setpoint

Minimum Discharge

Temperature Setpoint

Maximum Discharge

Temperature Setpoint

Mixed Air Temperature

Setpoint

Building Pressure Setpoint 0” W. C. -0.05” - +0.05” W. C.

Manual Damper Position

Setpoint

Minimum Ventilation

Setpoint

User PID Select Direct Acting DIRECT -REVERSE

High Input Value 0 -9999.99 – 99999.99

Override schedules

Heating HEATING - COOLING

PRESS - MIXED AIR

TEMP

65°F 40°F - 80°F

55°F 40°F - 130°F

100°F 55°F - 130°F

50°F 30°F - 90°F

20% Outside Air 0% - 100%

MUA-SVP01A-EN • Direct-Fired Indoor and Outdoor Units 3

Table 1. Default settings (continued)

ITEM DEFAULT RANGE

Low Input Value 0 -9999.99 – 99999.99

User Control Setpoint 0 -9999.99 – 99999.99

Maximum User Setpoint 0 -9999.99 – 99999.99

Minimum User Setpoint 0 -9999.99 – 99999.99

4 Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN

Contents

NETWORKING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

ADAPTAIRE DEFAULT SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

MDT Controls:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

MRT Controls: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

MRT-Pro Controls: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

MRT-Expert Controls:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Heating/Ventilating/Cooling Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . 12

Heating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Ventilation Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Damper Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

100% Outside Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Minimum Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Freezestat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Clogged Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

User Configured PID Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

DIRECT ACTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

REVERSE ACTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Unit Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Multiplexed Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Clock Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Critical Fault Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . Low Discharge Temperature26

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Circuit Open29

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Burner Status30

FAULT CODE: Burner Hand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flame Failure32

Diagnostics - Non-Critical Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unit off/Fan on33

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unit on/Fan off34

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Check Airflow Switches35

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clogged Filter Switch36

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Energy Save Mode 137

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Energy Save Mode 238

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Energy Save Mode 339

FAULT CODE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Insufficient OA40

Menu Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Menu Selection Tree for BACview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

UNIT MODES HOTKEY - 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

SET POINTS HOTKEY - 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

STATUS MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HOTKEY - 445

MUA-SVP01A-EN 5

Contents

ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HOTKEY - 145

RESETS HOTKEY - 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

SCHEDULES HOTKEY- 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

USER CONFIGURABLE OUTPUT HOTKEY - 8. . . . . . . . . . . . . . . . . . . . . . . . . 46

CLOCKSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HOTKEY - 047

HELP HOTKEY - 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

FUEL SELECT HOTKEY - 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Thermostat Output Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

10 K Ohms Thermistor Output Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Airflow Station Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

I/O Zone 583 Controller Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

6 MUA-SVP01A-EN

MDT Controls:

Unit Operating Modes

There are three different modes that control the supply fan and unit operation:

•Off

•Manual

•Auto There are also four different methods for controlling the operating modes:

• "a remote panel with two rotating knob adjustments ( MDT and MRT controls)

• "a remote panel with one rotating knob and an intelligent room sensor (MRTPro controls)

• "an intelligent room sensor and local user interface panel with LCD display (MRT-

• any of the above controls with a internet-base WebCTRL interface.

MDT, modulating discharge temperature, is the most basic AdaptAire control for discharge temperature . The MDT control syste m includes a re mote control pan el equipped with 1 or 2 potentiometers, 3 or more pilot lights, and up to 2 switc hes.

UNIT OFF MODE

Off Mode is the default unit operational mode. To place the unit in the Off Mode, rotate the "temperature setpoint" knob on the remote control panel counterclockwise to the stop. This will place the unit in the OFF mode and extinguish the "unit enable" light. The OFF mode prevents the unit from starting

UNIT MANUAL MODE

Manual Mode allows the unit to turn on. To place the unit in the Manual Mode, rotate the "temperature setpoint" knob on the remote control panel clockwise to the desired discharge air temperature setpoint. This will place the unit in the MANUAL mode and enable the burner. See Heating/Ventilating/Cooling Modes and Energy Saving Modes of this manual for more information.

UNIT AUTO MODE

Auto Mode has four different funct ions that cont rol the unit o peration. They are a time clock, heating and cooling night setbacks, and a signa l from an external source.

The MDT control does not support the time clock, night setback, or auxiliary unit enable functions.

MUA-SVP01A-EN • Direct-Fired Indoor and Outdoor Units 7

MRT Controls:

Unit Operating Modes

MRT, modulating room temperature, is the most basic AdaptAire control for room temperature. The MRT control system includes a remote control panel equipped with 1 or 2 potentiometers, 3 or more pilot lights, and up to 2 switc hes.

UNIT OFF MODE

Off Mode is the default unit operational mode. To place the unit in Off Mode rotate the "temperature setpoint" knob on the remote control panel counterclockwise to the stop. This will place the unit in the OFF mode and extinguish the "unit enable" light. The OFF mode prevents the unit from starting.

UNIT MANUAL MODE

Manual Mode allows the unit to turn on To place the unit in Manual Mode rotate the "temperature setpoint" knob on the remote control panel clockwise to the desired room temperature setpoint. This will place the unit in the MANUAL mode. The burner will be enabled if the room air temperature is 2° below the room temperature setpoint and will be deactivated when the room air temperature is above the room temperature setpoint. The cooling output will be enabled if the room air temperature is 2° above the room temperature setpoint and will be deactivated when the room air temperature is below the room temperature setpoint.

MRT-Pro Controls:

UNIT AUTO MODE

Auto Mode has four different funct ions that cont rol the unit o peration. They are a time clock, heating and cooling night setbacks, and a signa l from an external source.

The MRT control does not support the time clock, night setback, or auxiliary unit enable functions.

The AdaptAire MRT-Pro, modulating room temperature control, provides some limited information regarding unit operation on an LCD display and allows the user to adjust a few basic operational parameters. The MRT-Pro must be placed in the MANUAL or AUT O mode in the contro ller progr am using a BA Cv iew or PC in order for it to operate. The Off, Manual, and Auto modes will then function as described in the following sections.

UNIT OFF MODE

Off Mode is the default unit operational mode. The OFF mode prevents the unit from starting and overrides the Time Clock and Night Setback functions. A BACview or PC is required to change from this mode. See the section related to the MRT Expert for instructions on how to use the BACview for programming.

8 Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN

Unit Operating Modes

UNIT MANUAL MODE

Manual Mode allows the unit to turn on regardless of the Time Clock or Night Setback functions. A BACview or PC is required to change to this mode. See the section related to the MRT Expert for instructions on how to use the BACview for programming.

UNIT AUTO MODE

Auto Mode has four different funct ions that cont rol the unit o peration. They are a time clock, heating and cooling night setbacks, and a signa l from an external source. A BACview or PC is required to change to this mode. See the section related to the MRT Expert for instructions on how to use the BACview for programming.

Unoccupied/Occupied Control. Once the unit is placed in the Auto Mode, the unit can be controlled from the keypad on the MRT-Pro room sensor. The MRTPro room sensor display will indicate the unit is in the un-occupied period. To turn the unit on and place it in the occupied per iod press the " Manual On" b utton on the face of the MRT-Pro room sensor. Pressing the "Warmer" button can increase the amount of "on" time. Pressing the "Cooler" button can decrease the amount of "on" time. Each press decreases the time in 30-minute increments. Each press increases the time in 30-minute incr ements to a maximum of 9 hours of "on" time.

To turn the unit off and place it in the un-occupied period press the "Manual On" button on the face of the MRT-Pro room sensor. The display will indicate the amount of "on" time remaining. Press the "Cooler" button repeatedly until the time reaches zero, and the unit shuts off. Each press decreases the time in 30minute increments.

Auto Mode has four different funct ions that cont rol the unit o peration. They are a time clock, heating and cooling night setbacks, and a signa l from an external source.

Scheduling Time Clock. This function requires the purchase of a BACview or a direct PC interface to the unit controller. See the section related to the MRT Expert for instructions on how to use the BACview for programming.

Heating Night Setback. The Heating Night Setbac k function automatica lly cycles the unit "on" if the room temperature falls below the Heating Night Setback temperature setpoint, and the unit is sc heduled to be "off". If t he unit is sc heduled to be "off" and the Heating Night S etbac k f unction turns the unit "on", the unit will be cycled "off" once the room air temperature has risen 2° above the Heating Night Setback setpoint. The default for this setpoint is 55°F and is fixed at 10° below the Heating setpoint. Changing the Heating setpoint changes the Heating Night Setback setpoint

MUA-SVP01A-EN • Direct-Fired Indoor and Outdoor Units 9

Unit Operating Modes

to be "off" and the Cooling Night S etbac k function t urns the unit "on", the unit will be cycled "off" once the room air temperature has fallen 2° below the Cooling Night Setback setpoint. The default for this setpoint is 100°F and is fixed at 27° above the Cooling setpoint. Changing the Cooling setpoint changes the Cooling Night Setback setpoint.

Auxiliary Unit Enable. The Auxiliary Unit Enable function overrides all other Auto Mode functions and automatically cycles the unit into operati on. This function is activated whenever a contact is closed between the appropriate terminals on the unit's terminal strip located in the unit's main control panel. S ee the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information. This function can be used with a twist timer, toggle switch, door switch, exhaust fan interlock, or any other dry contact to override the time clock schedule.

MRT-Expert Controls:

The AdaptAire MRT-Expert, modulating room temperature control, provides full information regarding unit operation and allows the user to adjust all operational parameters using the include d BACview panel.

UNIT OFF MODE

Off Mode is the default unit operational mode. To place the unit in Off Mode scroll through the Unit Modes menu tree, locate the AUT O/OFF/MANUAL branch, and select OFF. This will place the unit in the OFF mode. The OFF mode prevents the fan and burner from starting. This mode will override the Time Clock and Night Setback functions.

UNIT MANUAL MODE

Manual Mode allows the supply fan to turn on regardless of the Time Clock or Night Setback functions. Heating and cooling functions use the Night Setback Setpoints. To place the unit in Manual Mode scroll through the Unit Modes menu tree, locate the AUTO/OFF/MANUAL branch, and select MANUAL. This will place the unit in the MANUAL mode.

UNIT AUTO MODE

Auto Mode has four different functions that control the supply fa n and unit operation. They are a time clock functi on, heating and cooling night setbacks, and a signal from an external source to an auxiliary digital input. To place the unit in Auto Mode scroll through the Unit Modes menu tree, locate the AUTO/OFF/ MAN branch, and select AUTO. This will place the unit in the AUTO mode. This activates the four Auto mode functions.

Scheduling Time Clock. The primary Auto Mode function is the Time Clock Schedule. The Time Clock function allows the user to schedule the operational times of the unit. There are four dif ferent sc hedules ava ilable: 24 hour continuous operation, daily, holiday, and override. The daily schedule can be programmed

10 Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN

Unit Operating Modes

for up to 4 separate On/Off events with any combination of days. The normal schedule sets the typical On/Off times for the unit. The holiday schedule can be programmed for up to 12 separate On/Off events with any combination of days. The holiday sche dule sets the Of f times for holidays and other shutdo wn periods. The override schedule can be programmed for up to 2 separate On/Off events with any combination of days. The ov erride schedule sets the On times that will override the holiday schedule. This scheduling system allows the user to program a diverse array of On/Off operations. An example of a typical schedule would be to have the unit On Monday through Friday from 6:00 AM to 5:00 PM, except during the weeks of Thanksgiving and Christmas when the units will be Off. Howeve r they will run eac h weekday during the Thanksgiving shutdown from 8:00 AM until noon while a maintenance crew is in the building. AdaptAire has no preset operational schedule.

To set the time clock function for 24 hour continuous ope ration scroll through the menu tree and locate the SCHEDULES page. Set the 24 Hr Op eration to yes. E nter the Daily section of the menu and set the Use tab to yes. Finally select the days for 24 hour operation.

To set the operational times of the unit scroll through the SCHEDULES menu tree, and locate the desired Daily, Holiday, or Override bra nc h. Enter the days and times for the unit to operate. In the Daily or Override section these times should correspond to the desired "on" times for the unit's operation. In the Holiday section these times should correspond to the desired "off" times for the unit's operation.

See the CLOCK SET section of this manual for setting the time, date and Daylight Savings function.

Heating Night Setback. The Heating Night Setbac k function automatica lly cycles the unit "on" if the room temperature falls below the Heating Night Setback temperature setpoint, and the unit is sc heduled to be "off". If t he unit is sc heduled to be "off" and the Heating Night S etbac k f unction turns the unit "on", the unit will be cycled "off" once the room air temperature has risen 2° above the Heating Night Setbac k setpoint. The def ault for this setpoint is 55°F. To change the Heating Night Setback setpoint scroll through the SETPOINTS menu tree, locate the Heating Night Setback setpoint and enter a new temperature. The allowable temperature range is 40°F - 80°F.

Cooling Night Setback. The Cooling Night Setbac k funct ion automatically cycle s the unit "on" if the room temperature rises above the Cooling Night Setback temperature setpoint and the unit is sc heduled to be "o f f". If the unit is scheduled to be "off" and the Cooling Night S etbac k function t urns the unit "on", the unit will be cycled off once the room air temperature has fallen 2° below the Cooling Night Setback setpoint. This function toggles digital output DO1. The default for this setpoint is 100°F. T o c hange the Cooling Night Setbac k setpoint scroll through the SETPOINTS menu tree, locate the Cooling Night S etback setpoint and enter a new temperature. The allowable temperature range is 75°F - 125°F.

Auxiliary Unit Enable. The Auxiliary Unit Enable function overrides all other Auto Mode functions and automatically cycles the unit into operati on. This

MUA-SVP01A-EN • Direct-Fired Indoor and Outdoor Units 11

Unit Operating Modes

function is activated whenever a contact is closed between the appropriate terminals on the unit's terminal strip located in the unit's main control panel. Heating and cooling functions use the Night Setback Setpoints. See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information. This function can be used with a twist timer, toggle switch, door switch, exhaust fan interlock, or any other dry contact to override the time clock schedule.

Heating/Ventilating/Cooling Operating Modes

The AdaptAire DDC controller automatically switches between the heating, ventilating and cooling modes of operation.

Heating Mode

Heating Mode allows the burner to operate as needed a nd is activated when ever the room temperature is 2° below the heating setpoint.

General Burner Control

In the Heating Mode the burner will modulate to maintain a constant temperature. To change t he desired heating di sc harge or room temperature of a n MDT or MRT control system, rotat e the tempe rature set point knob on the remote panel clockwise to the desired temperature.

To change the desired heating room temperature of an MRT-Pro control system, depress the Warmer button to increase the desired room temperature setpoin t or depress the Cooler button to decrease the desired room temperature setpoint. Each push of a button changes the temperature setpoint by 1°F. The setpoint can be changed a maximum of ±10°F from the default of 72°F.

To change the desired heating room temperature of an MRT-Expert control system, scroll through the SETPOINTS menu tree using the BACview, locate the Occupied Heating Setpoint, and enter a new temperature. The allowable temperature range is 55°F - 90°F. The burner will modulate using a PID loop to maintain this temperature.

Additionally, on all controls systems except the MDT the control system modulates the burner to maintain the suppl y air temperature within a defined operating window. This window defines the maximum and minimum discharge temperatures.

To change the desired minimum supply or discharge air temperature scroll through the SETPOINTS menu tree, locat e the HTG MIN D A S etpoint, and enter a new temperature. This temperat ure must not be greater than the HTG MAX DA Setpoint. The allowable temperature range is 40°F - 130°F. This sets the lowest discharge air temperature that will leave the unit.

To change the desired maximum supply or discharge air temperature scroll through the SETPOINTS menu tree, locate the HTG MAX DA Setpoint, and enter a new temperature. This temperature must not be less than the HTG MIN DA

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Unit Operating Modes

Setpoint. The allowable temperature range is 55°F - 130°F. This sets the highest discharge air temperature that will leave the unit.

If the maximum and minimum discharge temperature setpoints are set for the same temperature, the supply air temperature will be the same as the setpoint regardless of the room temperature setpoint or actual room temperature.

Recirculating Direct-Fired Heaters. Using different controller software, the AdaptAire DDC system can accommodate three distinct types of recircu la t in g direct-fired units: those that return air before the burner and employ a special airflow station, those that return air before the burner and do not employ a special airflow station, and those that recirculate air after the burner. Recirculating direct-fired units, like all direct-fired units, deliver all of their products of combustion directly to the heated air space. For this reason it is extremely important that the proper ventilation ra te be maintained to dilute these emissions.

AdaptAire units, that recirculate air before the burner and employ an airflow measuring station, utilize a control scheme that measures air pressure to determine the ratio of outside air and return air. These units are listed by an independent third party testing agency and use the equivalent temperature rise control scheme to limit burner modulation. The AdaptAire system accurately measures the ratio of outside and return air, calculates the allowable equivalent temperature rise and automatically lim its the burne rs firing rate. This in sures the products of combustion, delivered to the space by the unit, are held at or below allowable OSHA thresholds. The outside air percentage is the driving parameter for this function. A greater percentage of outside air or dilution air enables the unit to generate a higher allowable equi valent temperature rise.

AdaptAire units that recirculate air before the burner and do not employ an airflow measuring station utilize a control scheme that measures damper position to determine the percentage of return air. These units are not listed by an independent third party te sting a gency but do use the equivalent temperature rise control scheme to limit burner modulation.

AdaptAire units that recirculate air after the burner are physically constrained to limit the percentage of return air. These constraints are meant to provide the proper dilution air . An independent third party testing agency and do not use the equivalent temperature rise control scheme to limit burner modulation does not list these units.

In order of lowest to greatest priority the burner modulation parame ters are: room temperature, discharge or supply air temperature, and equivalent temperature rise.

There are three Energy Savings modes that could disable the burner.

Energy Savings Mode 1—Mixing Box Recirculating Units. Energy Savings Mode 1 will automatically disable the burner if the mixe d ai r te mperatu re i s e qual t o or greater than the minimum discharge air temperature setpoint, and the room air temperature is 5°F above the room air tempe r ature setpoint. This function is intended to restrain the room temperature from rising uncontrollably in buildings

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Unit Operating Modes

with internal heat gain. In certain conditions it may be necessary to readjust the minimum discharge air or room temperature setpoint upward or adjust the outside/return air ratio to provide a warmer supply air temperature.

Energy Savings Mode 1—Non-Recirculating Units. Energy Savings Mode 1 will automatically disable the burner if the outside air temperature is equal to or greater than the minimum discharge air temperature setpoint, and the room air temperature is 5°F above the room air tempe r ature setpoint. This function is intended to restrain the room temperature from rising uncontrollably in buildings with internal heat gain. In certain conditions it may be necessary to readjust the minimum discharge air or room temperature setpoint upward or adjust the outside/return air ratio to provide a warmer supply air temperature.

Energy Savings Mode 2—Mixing Box Recirculating Direct-Fired Units. Energy Savings Mode 2 will automatically disable the burner if the burner's minimum firing rate exceeds the allowable equivalent temperature rise. This condition is unlikely to occur unless the burner's minimum firing rate is misadjusted and set too high, or the inlet air opening is restricted.

Ventilation Mode

Energy Savings Mode 3. Energy Savings Mode 3 will automatically disable the

burner if the outside air temperature is above the Outside Air Economizer setpoint. This function is similar to an inle t duct thermo stat. The burn er will cycle back on if the supply air temperature drops 3°F be low the Outside Air Economiz er setpoint.

To change the desired outside air economizer temperature scroll through the SETPOINTS menu tree, locate the ECONOMIZER Setpoint, and enter a new temperature. The default for this setpoint is 65°F. The allowable temperature range is 40°F - 80°F.

Ventilation Mode occurs when the fan is running but the unit is not providing heating or cooling.

On an MDT control system the heating mode is activated when the remote temperature setpoint knob is turned to start the unit. See Energy Savings Modes for more information.

On all other systems the ventilation mode is dependant on the room temperature. The heating/ventilation/cooling operation is demonstrated below. The dotted line in the middle of the diagram represents the change between room temperature rise and room temperature fall. Select a point on the heavy line in the diagram to determine the mode of operation.

EXAMPLE: Start at point "A". The unit is in the ventilation mode and the room temperature is rising. Follow the dashed line upward. If the room temperatu r e rises to a temperature that is 2°F over the cooling setpoint, the cooling will be enabled, and the unit will be in the cooling mode. Fo llow the solid line clockwise. Once the room temperature has fallen to the cooling setpoint, the cooling mode will be disabled, and the room will be in the ventilation mode. Follow the dashed

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Unit Operating Modes

line downward. If the room temperature falls to a temperature that is 2°F below the heating setpoint, the heating will be enabled, and the unit will be in the heating mode. Continue following the solid line in a clockwise direction to the heating setpoint. Once the room temperature rises to the heating setpoint, the heating mode will be disabled, and the room will be in the ventilation mode.

Figure 1. Cooling Mode

Cooling mode

T E M

+2°F of cooling SP cooling enable

P E

Ventilation

mode

A T U R E

heating SP

R I S E

Heating mode

Cooling mode

-2°F of heating SP

cooling SP

heating enable

Cooling mode

Ventilation mode

Heating mode

T E M P E R A T U R E

F A L L

Heating mode

Cooling Mode

Cooling Mode allows the cooling to operate as needed a nd is activated whenever the room temperature is 2° above the cooling setpoint. In the Cooling Mode the cooling output will cycle to maintain a constant room temperature. The cooling output does not have an anti-cycle delay.

The MDT control system does not support the Cooling Mode. To change the desired cooling room temperature of an MRT control system,

rotate the temperature setpoint knob on the remote panel clockwise to the desired temperature. The allowable temperat ure range is 55°F - 90°F. The cooling will be disabled when the room temperature drops to the Cooling Setpoint.

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Unit Operating Modes

To change the desired cooling room temperature of an MRT-Pro control system, depress the Warmer button to increase the desired room temperature setpoin t or depress the Cooler button to decrease the desired room temperature setpoint. Each push of a button changes the temperature setpoint by 1°F. The setpoint can be changed a maximum of ±10°F from the default of 72°F.

To change the desired cooling room temperature of an MRT-Expert control system, scroll through the SETPOINTS menu tree using the BACview, locate the Occupied Cooling Setpoint, and enter a new temperature. The allowable temperature range is 61°F - 96°F. The burner will modulate using a PID loop to maintain this temperature.

Additionally, on all controls systems except the MDT the control system cycles the cooling output to maintain the supply air temperature within a defined operating window. This window defines the maximum and minimum discharge temperatures.

To change the desired minimum supply or discharge air temperature scroll through the SETPOINTS menu tree, locate the CLG MIN DA Setpoint, and enter a new temperature. This temperature must not be greater than the CLG MAX DA Setpoint. The allowable temperature range is 55°F - 130°F. This sets the lowest discharge air temperature that will leave the unit.

To change the desired maximum supply or discharge air temperature scroll through the SETPOINTS menu tree, loca te the CLG MAX DA S etpoint, and enter a new temperature. This temperature must not be less than the CLG MIN DA Setpoint. The allowable temperature range is 55°F - 130°F. This sets the highest discharge air temperature that will leave the unit.

Damper Control Modes

There are four different modes that control the unit damper operation: Manual, Mixed Air Temperature, Building Pressure, and 100% Outside Air. Except for the 100% Outside Air mode, these operating modes are selected through the menu tree of the local user interface or PC. Not all damper modes are available on all units.

Manual Mode

Manual Mode is the default damper operational mode. This will set the outside air damper to a fixed position.

MDT and MRT Controls. To place the damper operation in Manual Mode on an MDT or MRT control sy st em b e sure th e ap propria te termin als in the unit cont rol panel are not shorted. See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information. Rotate the damper control knob on the remote panel to the desired percentage of outside air. If the unit served by this control is a direct-fired heater, that recirculates air before the burner, and is

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Unit Operating Modes

operating in the heating mode, the unit will automatically keep the minimum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.

MRT-Pro Controls. To change the damper mode on an MRT-Pro control system requires the use of a BACview or PC. See the section related to the MRT Expert for instructions on how to use the BACview for programming.

MRT-Expert Control. To place the damper operation in Manual Mode scroll through the menu tree, locate the Damper Mode branch and select Manual Pos. Next, scroll through the menu tree, locate the Setpoints branch, select Man Vent SP, and enter the desired damper position. The allowable range is 0% to 100%. If the unit served by this control is a direct-fired heate r, that recirculates air before the burner, and is operating in the heating mode, the unit will automatically keep the minimum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.

Mixed Air Temperature Mode

The Mixed Air Temperature mode varies the percentages of outside air and return air to maintain a constant mixed air t emperature. The AdaptA ire controller computes the mixed air temperature using the outside air and return air temperatures and the ratio of their respective airflows.

MDT and MRT Controls. To place the damper operation in Mixed Air Temperature Mode on an MDT or MRT control system be sure the appropriate terminals in the unit control panel are shorted. See the Typical Wiring Schematic and Multiplexed Input sections of this manual for more information. Rotate the damper control knob on the remote panel to the desired mi xed air temperature. If the unit served by this control is a direct-fired heate r, that recirculates air before the burner, and is operating in the heating mode, the unit will automatically keep the minimum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.

MRT-Expert Control. To place the damper operation in Mixed Air Temperature Mode scroll through the menu tree, locate the Damper Mode branch and select MA Temp Ctrl. Next, scroll through the menu tree, locate the Setpoints branch, select Mixed Air , and enter th e desired temperature. The allow able range is 30°F - 80°F. If the unit served by this control is a direct-fired heater, that recirculates air before the burner, and is operating in the heating mode, the unit will automatically keep the min imum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.

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Unit Operating Modes

Building Pressure Mode

The Building Pressure mode varies the percentages of outside air and return air to maintain a constant pressure within the space. A pressure transducer compares the pressure outside the space to the pressure inside the space and transmits a corresponding signal to the AdaptAire controller. The controller compares this signal to the desired building pressure setpoint and uses a PID loop to modulate the outside air and return air dampers to maintain the specified building pressure.

MDT and MRT Controls. The MDT and MRT control systems do not support building pressure control mode.

MRT-Expert Control. To place the damper operation in Building Pressure Mode scroll through the menu tree, locate the Damper Mode branc h and select Bld g Prs Ctrl. Next, scroll through the menu tree, locate the Setpoints branch, select Bldg Prs, and enter the desired pressure. The allowable ran ge is -0.0 5"wc to +0.05"wc. If the unit served by this control is a direct-fired heater, that recirculates air before the burner, and is operating in the heating mode, the unit will automatically keep the minimum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.

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