Rheem RARL-JEC Installation Instructions - Page 37

ADVANCED SETTINGS All adjustments for airflow are made at the thermostat at this point. Items that can be changed are Airflow trim adjustment Dehumidification Setpoint and mode of operation. The thermostat also has a wide range of fault and history information. The following tables show all of the available options by unit type. To go down into a menu press Install Config to move back up press the Menu button. See Installation Instructions. 17.2 REPLACEMENT OF COMFORT CONTROL2 SYSTEM™ CONTROL 17.2 BOARD Each control board in the Comfort Control2 System™ needs information specific to the unit the control is installed in. This information is called shared data because it is distributed (shared) on the HVAC network. The shared data for a unit contains information that allows the unit to operate correctly. FIGURE 10 COMFORT CONTROL2 SYSTEM™ CONTROL BOARD REPLACEMENT TETHER AND MEMORY CARD When a control board requires replacement, it is important that the replacement board gets the shared data from the old control. The primary way the replacement control gets this information is by the memory card that should be installed on the old control. Remove the memory card from the old control, but leave it attached to the unit by the plastic tether, replace the control and reinstall the memory card on the new control. If for some reason the memory card has been damaged or is missing, the shared data from the network (air handler) will be used by the control. The network shared data is considered a back up for a lost or missing memory card. Never remove the memory card from the unit or cut the tether of the memory card as it is the most effective way to transfer the shared data. If the memory card is damaged or missing a new memory card can be ordered from Pro Stock. The unit will operate without the memory card, but a D4 error will be displayed on the seven segment displays. The memory card from a different unit should never be used. 37