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Manual 2100-670I

Page

34 of 47

air filters. After the time has expired and on a call for
cooling, the economizer will open again to sample the
air. The wall-mount unit will either return to normal
operation or remain locked out for another 5 minutes.

Emergency Cooling Mode

If the shelter temperature is above the high temperature
alarm setpoint on the LV, the unit will be commanded
into emergency cooling mode. In this mode, the
unit will operate the economizer regardless of the
economizer setup, as long as the outdoor temperature is
below the indoor temperature. The cooling demand will
be automatically set to 100% in this mode, meaning
mechanical cooling should be operating at full capacity
while this mode is active. This will stay active until the
LV returns the unit to normal operation. This mode is
only available when connected to the LV.

Emergency Ventilation Mode

If a hydrogen detector is connected to the LV/FUSION-
TEC system and there is a hydrogen alarm event, the
system will go into emergency ventilation mode. In
emergency ventilation mode, the economizers on the wall
units will be commanded to 100%. After 2 minutes, the
blowers will turn on in order to exhaust any hydrogen
gas buildup within the shelter. Once the hydrogen alarm
clears, the system will resume normal operation. This
mode is only available when connected to the LV.

Model/Serial Number Configuration

FUSION-TEC wall-mount units configure some settings
based on the model number that is input into the
unit. The model and serial numbers are entered at
the factory and should be retained during a software
update. However, after a software update, it is best
practice to verify that the model and serial numbers are
still present and accurate. If the model and/or serial
number is missing or incorrect, they will need to be
re-entered.

NOTE:

When re-entering the model number, only valid

model number entries will be accepted by the

PLC.

To update model/serial numbers:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter

ENGINEER password 9254.

3. Press UP or DOWN keys to scroll to

Adv Sys

Config

; press ENTER key.

4. Press UP or DOWN keys to scroll to

Factory

Settings (B1)

5. Press ENTER key to advance the cursor to the digit

that needs changed in the model/serial number.

6. Press UP or DOWN keys to change value of the

digit.

7. Continue Steps 5 and 6 until the model/serial

number(s) are correct and reflect the number on
the product label.

For more information on the options and settings
available for specific model numbers, please see the
model number breakdown in Figure 57 on page 38.

Electric Heat Option

Electric Heat Components

Electric Heating Element

The unit is optionally equipped with a 1.5kw or 5kw
heat strip. The heat strip is located next to the blower
assembly and uses resistive heat.

Thermal Overload

The heater assembly has a thermal overload wired in
series with the heating element. This device has a
cycling limit which opens at 130°F and resets at 80°F.
The limit is also equipped with a redundant thermal
fuse that will open at 150°F.

Electric Heat Operation

The heat strip will be activated on a call for heat. This
call can be generated by the LV or the wall-mount unit
operating in stand alone mode.

TABLE 8

Economizer Default Settings

* In Enthalpy mode, outdoor temperature, humidity and calculated dew point are all considered for economizer operation.

Mode

Consideration

Economizer Available for Cooling

Economizer Not Available for Cooling

Temp

Only

Temp & Humidity