Issue:
This article describes how to navigate through an Network Air FM unit display.

Product line:
ACFM, Network Air, IR40.

Environment:
All Serial Numbers.

Cause:
Operation.

Resolution:

System Configuration

The System configuration options are defined both at the factory and during the commissioning of the Modules in the System...
Caution: Changing the settings incorrectly can cause serious malfunctions and damage to your System. Only qualified service personnel should make changes to these settings.
Note: Some System configuration settings may not apply to your APC NetworkAIR FM DX Precision Air Conditioner.

System options

Path: Main > Setup > System # > System Config > System Options

The System Options menu contains settings that identify the hardware installed in this System and the methods used to control that hardware.

Mains In. Indicates the primary operating voltage required for this System. The configuration is based on the voltage of the electrical components in the System.and is printed on the nameplate attached to the door on the right side of the electrical box.

Coil Cfg. Indicates the coil configuration installed in the Modules of this System.

• DX—Direct expansion (DX) coil

• Econ—Economizer and DX coils

• MultiCool—MultiCool® (chilled water) and DX coils

Humid Ctrl. Indicates the humidity control method. The System can control the humidity based on the relative humidity (RH) of the return air and the dew point (DewPt) of the return air.

• Relative humidity (RH): The System activates humidification modes based on the difference between the humidify/dehumidify setpoint and the return humidity value.

• Dew point (DewPt): The dew point method corrects for hotspots near the environmental sensors, and is calculated from the temperature and relative humidity of the room air.

– The System activates humidification based on the dew point setpoint and the calculated dew point in the room.

– The dew point setpoint is calculated from the humidification setpoint and the reheat setpoint.

If there is no reheat mode, then the cooling setpoint is used.

Example. If the reheat setpoint is 20°C (68°F) and the humidification setpoint is 50%, the dew point setpoint is 27°C (80°F). If the room temperature is 23°C (74°F) and the return

humidity is 40% the dew point of the room is 26°C (78°F). The humidifier demand is calculated as the difference between the actual room dew point and the desired room dew

point divided by the sensitivity. In this example: Demand = (49 - 48) / 2 = 0.5 or 50% demand. The humidifier output will be about 50%.

Note: The System will always use the dew point method when the remote sensor readings are used to control the room environment or if the System is part of a redundant Group.

# PCIOMs. Set the number of Programmable Customer Input/Output Modules (PCIOMs) installed in the user interface box. This setting controls the number of input

contacts and output relays available in the

Input/Output menu.See “Contacts and Relays” on page 25 to set up the contacts and relays from the display interface.See the NetworkAIR FM DX 60 Hz

Installation manual to connect the contacts and relays to the Main Module.

# Modules in Sys. Indicates the number of Modules in this System. Up to three Modules can be joined together to work as a single System.

Air Filter. Set the type of air filters installed in the Modules of this System to either standard (30-40%) or high efficiency (65-85%).

Fast Startup. Set the System to bypass the normal start-up sequence and start-up delay the next time power is applied to the System.

Note: The Fast Startup option is not recommended for typical installations.

Airflow. Set the airflow pattern for the Modules in this System.

• Up

• Down

Rej. Method. Indicates the method used for heat rejection by the refrigeration system.

• Air

• Water

• Glycol

Dehum Capacity. The dehumidify mode can be set to use half capacity or full capacity of the cooling coil.

• Half capacity uses one compressor and half of the cooling coil to dehumidify. Rooms with small heat loads should use half capacity to avoid over-cooling while dehumidifying.

• Full capacity uses the entire coil and both compressors. When the unit is in dehumidification mode the dehumidification solenoid valve on the secondary liquid line is not energized and remains closed. All refrigerant is directed through the expansion valve which feeds three quarters of the cooling coil.

Module Rot. The System rotates the order in which the compressors are engaged to equalize the total number of hours that each compressor runs. Set the number of hours at which to change the order in which the compressors are engaged. A setting of zero indicates that the order in which the compressors are engaged should not be changed.

Refrigerant. Set to the type of refrigerant charge used in the direct expansion refrigeration system..

Suction Pressure Compensation. Allows the System to slow the blowers if the suction pressure gets too high. Use this setting if you are using the FM in a high-density application

System delays

Path: Main > Setup > System # > System Config > System DelaysThe System Delays protect the Modules in the System from excessive wear and damage and keep the modes (cooling, reheat, and dehumidify) from working against each other.

Comp Min ON. The delay begins when the compressor engages and then prevents the compressor from disengaging until the delay has expired. It protects the compressors from rapidly cycling between on and off and pushing all of their lubricating oil out into the refrigerant line.

Caution: Reducing the Comp Min ON delay can shorten the compressor life by causing excessive wear and damage.

Comp Min OFF. TheThe delay begins when the compressor disengages and then prevents the compressor from engaging until the delay has expired. It protects the compressors from rapidly cycling between on and off and pushing all of their lubricating oil out into the refrigerant line.

Caution: Reducing the Comp Min OFFdelay can shorten the compressor life by causing excessive wear and damage.

Cndsr Vlv Dly. The condenser fluid valve close delay begins when the compressors disengage, and then keeps coolant flowing through the heat exchanger until the delay expires. Once the delay expires, the condenser fluid valve closes.

Intrstg Dly. The interstage delay begins when the first compressor (stage 1) in a Module engages. It prevents a second compressor (stage 2) in a System from engaging until the delay has expired.

Start-up Dly. The start-up delay begins when the System is started and initialized. The System cannot begin operation until this delay has expired. Use the start-up delay to restart equipment sequentially in your room after a power loss.

Mode Dly. The start-up delay begins when the blowers start. It allows the sensors to obtain an accurate reading of the room conditions and it allows the System to check for major alarms before engaging environmental control functions.

Communication Loss Shutdown Delay. Set the communication loss shutdown delay. The delay begins when an Expansion Module loses communication with the Main Module of a System. If communication is not restored before the delay expires, the Expansion Module will shut down. Set the delay for up to twenty-four hours, or set the Expansion Modules to continue operating if communication with the Main Module is lost by selecting Disabled.

Building management

Path: Main > Setup > System # > System Config > Building Management
If you are using a building management system with your Module, you must set the following values:

Address. The address of the Main Module on the RS-485 bus.

Baud Rate. The baud rate for the RS-485 bus.

Parity. The parity for the RS-485 bus.

Stop Bits. The stop bits for the RS-485 bus. See the NetworkAIR FM DX 60 Hz Installation manual to wire the electrical connections of the building management system to the RS-485 bus of the Module.

Sensor setup

Path: Main > Setup > System # > System Config > Sensor Setup

Specify the set of sensors the Module will use to calculate the environmental control demands.

Temp/Hum Snsrs. Choose the set of temperature and humidity sensors the controller will use when determining the need for environmental control. The return sensors and the remote sensor string are available.
Note: Any optional remote temperature and humidity probes installed must be supported by the NetworkAIR FM DX.

Dflt Snsrs. Choose the sensor group that the System will use when the System settings are reset to their default values.

Rmt Snsr Data. When determining the environmental controls, choose the measurement from the remote sensors for the controller to use.

• Max—Use the maximum value reported by a sensor on the string.

• Avg—Use the average reported values of all of the sensors on the string.

Settings for fluid-cooled options

Modules using the Economizer or MultiCool options have several settings that must be defined. To accommodate the heat of the rejection method, the valve and piping settings must be configured.The following table lists the settings that apply to each type of fluid-cooled option. Refer to the rest of this section for detailed descriptions of each setting:

Valve types

Path: Main > Setup > System # > System Config > Valve Types

Flow Switch. Set the location of the optional flow switch in this System. The flow switch detects if there is adequate liquid coolant (glycol or water) flow to maintain coil operation. If the flow switch detects inadequate flow in a MultiCool or Economizer coil, it will switch the cool or dehumidify mode to the direct expansion coil. If the flow switch detects inadequate coolant flow at the heat exchanger it will disable the compressors.

The Flow Switch setting indicates where the flow switch is installed:

• DX—for the water or glycol line entering the heat exchanger (to maintain head pressure in DX Systems).

• Multi—for the chilled water input to the MultiCool coil or chilled water coil (Systems using chilled water only).

• None—for air-cooled Modules with no MultiCool coil.

Cndsr Vlv. The condenser fluid valve controls the flow of coolant into the heat exchanger or to the Economizer coil. Set the condenser fluid valve as a three-way valve.

Note: Economizer valves are always three-way valves.

Coil Fluid. The coil fluid valve controls the flow of coolant to either the MultiCool, Chilled Water, or Economizer coil. Set the coil fluid valve as a three-way valve.

Actuator types

Path: Main > Setup > System # > System Config > Actuator Types

Cndsr Vlv. Set the type of condenser valve actuator; the actuator can be set as Flt Ctrl or None.

• Floating Control maintains the position of the valve when the power is off.

• None indicates that no condenser valve is installed. Air-cooled Systems with no external water piping do not require a condenser valve actuator.

Coil Fluid. Set the coil fluid valve actuator to Flt Ctrl, or None.

• Floating Control maintains the position of the valve when the power is off.

• None indicates that the Module does not have a MultiCool or Economizer coil.

Economizer isolation valve (optional)

When multiple Modules having three-way valves are connected to a common coolant source, coolant flow through a Module exists even when there is no cooling demand. The Economizer (coolant) isolation valve is used in these instances to stop coolant flow through a Module during times of no cooling demand in applications where a variable speed coolant pump is used.

• Econ Isolator Close Dly

• Econ Isolator Open Dly

• Econ Isolator Valve Enable

• Econ Isolator— mapped to an output relay

Path: Main > Setup > System # > System Config > System Delays

Econ Isolator Valve Delay: Close. When there is no longer a demand for cooling, the Economizer isolation valve actuator closes the valve. The valve remains open during the close delay, keeping coolant flowing through the coil and the heat exchanger until the delay expires.

Econ Isolator Valve Delay: Open. When there is a demand for cooling, the Economizer isolation valve actuator opens the valve. The compressors will not engage until the open delay has elapsed.

Note: If you are using different types of actuators for the Modules in your System, set the open delay to accommodate the valve that takes the longest to open.

Path: Main > Setup > System # > System Config > Coil Fluid Options

Econ Isolator Valve: Enable. Use this setting to indicate that an Economizer isolation valve is installed in the coolant piping for this System.

Path: Main > Setup > System # > Input/Output > Output Relays

Econ Isolator Output Relay. To use the Economizer isolation valve, you must map the ECON

ISOLATOR event to one of the output relays. When you set up the relay for the Main Module, it will copy the settings to the Expansion Modules.

Coil fluid temperature activation threshold and deadband

Path: Main > Setup > System # > System Config > Coil Fluid Options

The Coil Fluid Options help control the optional MultiCool coil or Economizer coil in equipped Systems. Set the temperature threshold and deadband for using the MultiCool coil or the Economizer

coil. The System will compare the actual coolant temperature with the setpoint and deadband to determine if the coolant is at a temperature low enough to operate the coils.

Coil Fluid Temp Activation: Threshold. Set the coil fluid activation threshold. The coolant temperature must be below the threshold to use the optional MultiCool coil or Economizer coil.

Coil Fluid Temp Activation: Deadband. Set the MultiCool or Economizer activation deadband. The deadband is the sensitivity range above the

Coil Fluid Temp Activation: Threshold that the coolant temperature can reach before the controller will stop using the MultiCool or Economizer coil. For example, if the threshold is 10°C (50°F) and the deadband is 2.2°C (4°F), then the controller will disengage the MultiCool coil or Economizer coil when the coolant temperature exceeds 12.2°C (54°F) and will not reengage the coil until the coolant temperature reaches 10°C (50°F).

Input contacts

Path: Main > Setup > System # > Input/Output > Input Contacts

Each Main Module supports up to 16 user-defined input contacts. Each contact monitors a sensor and responds to changes in the state of the sensor (open or closed).

Name. Provide a unique name for each input contact.

Normal. Choose the normal state of the sensor. If the state changes, the controller takes the action defined by the Alarm Map setting.

Delay. Set how long the contact should be out of its normal state before the controller takes action (controlled by the Alarm Map setting).

Action. Set the System controller to respond to the change of status for an input in one of the following ways:

Output relays

Path: Main >Setup >System # >Input/Output >Output Relays

The Main Module supports up to 16 user-defined output relays. Output relays respond to internal alarms and events by changing states to notify outside devices.

Relay Out. Choose the relay number to view or modify.

Map. Choose alarms or events to map to this relay:

• The first line of the map field displays the location of the event that is mapped to this relay. It can be a System, Main Module, Expansion Module 1, or Expansion Module 2 event.

• The second line displays the name of the event mapped to this relay.

Note: Any input contact or output relay available in this System can be mapped to this relay.If you have installed an Economizer automatic coolant isolation valve (Econ Isolator), you need to

map the Econ Isolator event to a relay connected to the isolation valve actuator.Caution: When using the Economizer automatic isolation valve, map only the Econ

Isolator event to the relay connected to the valve actuator. See the NetworkAIR FM DX 60 Hz Installation manual for instructions on wiring the relay connection to the automatic isolation valve actuator.

If you have installed an Economizer automatic coolant isolation valve (Econ Isolator), you need to map the Econ Isolator event to a relay connected to the isolation valve actuator.

Action.

The Action field changes as you scroll through the list of events that can be mapped to this relay. Remove indicates that the event is already associated with this relay. Add indicates that the

event is not associated with this relay. Press the ENTER key and change the setting to map the displayed event to this relay or remove the displayed event from the list of events mapped to this relay.

Normal. Set the normal state for this relay. If the state of an alarm or event mapped to this relay changes from the normal state, the relay also changes state.

Reset Mappings. Clear all of the output mappings back to their default setting.

Configure Module

Paths: Main > Setup > Module > Main Module > Module Config > Config Module

Main > Setup > Module > Expansion Module 1 > Module Config > Config Module

The Config Module menu settings define the optional equipment available in the Module.

• Output Cap – Indicates the output capacity of the Module, in kilowatts.

• Heater – Indicates the type of heating equipment installed to run the reheat mode.

• Humid – Indicates the type of humidifier equipment installed to run the humidification mode.

• Conds Pump – Indicates the presence of a condensate pump. The pump feeds the condensate from the reservoir into the drain.

• Blower – Indicates the type of blower controller for this Module.

• ElecHeater Cap – Indicates the capacity of the electric heater.

Alarm detectors

Paths: Main > Setup > Module > Main Module > Module Config > Set Alarm Detectors

Main > Setup > Module > Expansion Module 1 > Module Config > Set Alarm Detectors

The Set Alarm Detectors settings indicate the presence of sensors in the Modules.

• Smoke – Indicates whether a smoke detector is installed in the Module.

• Fire – Indicates whether a fire detector (thermal sensor) is installed in the Module.

Note: Thermal sensors for fire detection are not intended for personnel safety.

The devices are intended to supplement, not replace, building fire detection systems.

• Water – Indicates whether water leak detectors (loop detectors) are installed in the Module.

The Module Control options are configured and tuned during the commissioning of each Module.

Caution: The settings in the Module Control menu are defined at the factory. Changing the settings incorrectly can cause serious malfunctions and damage to your System. Only

qualified service personnel should make changes to these settings.

Calibrate airflow manually

Note: The System must be on and the blowers must be operating to calibrate the airflow manually. If either condition does not exist, the display will prompt you to turn on the System and blowers.

Nom Coil DP. Set the nominal coil differential pressure.

Blower Spd. Adjust the frequency of the blower.

Coil DP. Displays the coil differential pressure. The coil differential pressure changes as the blower frequency is adjusted. The Std Dry value in the table below gives the recommended coil differential

pressure for the FM DX Precision Air Conditioner.

Calibrate airflow automatically

Nom Coil DP. Set the nominal coil differential pressure.

Start/Abort. Start the automatic calibration. If calibration is in progress, this line displays: Abort.

Coil DP. Displays the coil differential pressure. The coil differential pressure changes as the blower frequency is adjusted. When the Coil DP values match the Nom Coil DP value, the System will display

Calibration Complete. If the System cannot align the two values, the System will display

Calibration Failed after two minutes. You must manually calibrate the airflow if automatic calibration fails.

Reset Variable Frequency Drive

Paths: Main > Setup > Module > Main Module > Module Control > Reset VFD#

Main > Setup > Module > Expansion Module 1 > Module Control > Reset VFD#

The Reset VFD option resets the variable frequency drive (VFD). The drive shuts down during a VFD # Fault Tolerance Exceeded alarm. The alarm occurs when the VFD detects three faults within thirty

minutes. Use this function to restart the drive manually when the alarm condition is resolved. Caution: VFD Fault Tolerance Exceeded alarms indicate a problem with the VFD or

blowers. Check the event log for other alarms before resetting the VFD.

Reset humidifier

Paths: Main > Setup > Module > Main Module > Module Control > Reset Humidifier

Main > Setup > Module > Expansion Module 1 > Module Control > Reset Humidifier

The Reset Humidifier option resets the humidifier. The humidifier shuts down during a Humidifier

Fault Tolerance Exceeded alarm. The alarm occurs when the humidifier detects three faults within thirty minutes. Use this function to restart the humidifier manually when the alarm condition is resolved.

Caution: Humidifier Fault Tolerance Exceeded alarms indicate a problem with the humidifier. Check the event log for other humidifier alarms before resetting the humidifier.

Set up humidifier

Paths: Main > Setup > Module > Main Module > Module Control > Set Up Humidifier

Main > Setup > Module > Expansion Module 1 > Module Control > Set Up Humidifier

The Set up Humidifier option controls the steam-electrode humidifier mode.

Humidifier Model. The steam-electrode humidifier can be set to one of three modes:

• Off—Removes power from the electrodes in the humidifier while the cylinder remains filled.

• Drain—Removes power from the electrodes and drains the cylinder.

• Auto—Applies power to the humidifier and sets the humidifier to operate according to the Module controller.

Note: The steam-electrode humidifier must be in Auto mode to operate.

Publié pour:APC Canada (French)