Stulz CeilAir CW - Operating the Unit; Shut-Down Procedure; Start-Up Procedure

65OCH0006F08/13/2024
CEILAIR
®
CW & DX IOM
3.2.2 STARTUP PROCEDURE
5. Test heating operation by setting the temperature set-point above the actual room temperature. The
heater will energize to increase the discharge air temperature.
6. Test humidifier operation by creating a demand for humidification. Use an amp meter to determine the
current draw of the humidifier. Visually check for vapor leaving the steam head or feel if the cylinder
is warm to verify the humidifier is operational. In all cases, one to six hours might be required to see a
desired level or rise in humidity in the conditioned space. Once room conditions have been programmed
or set, a repeat visit to the conditioned space may be required to ensure the humidifier is meeting the
room’s requirements.
An operation and maintenance manual for the humidifier is available separately. Refer to that manual for
detailed information on humidifier operation.
7. Test dehumidification operation by creating a demand for dehumidification. If necessary, set the
dehumidification setpoint 10% below actual room conditions. The cooling circuit(s) will turn on to begin
the dehumidification process. While in this mode, room temperature may decrease and the reheat
function may activate. As conditions in the room change, you may have to readjust the setpoint as you
check the unit's operation. An adequate heat load within the room is required.
8. For electric reheat, use an amp meter on the heater circuit to determine if the heater is operational.
For hot water reheat, ensure the control signal has energized the control valve and the temperature of
the water has decreased as it passes through the unit. In all cases, one to six hours might be required
to see a desired level or decrease in humidity in the conditioned space. Once room conditions have
been programmed or set, a repeat visit to the conditioned space may be required to ensure the
dehumidification mode is meeting the room’s requirements.
3.2 Operating the Unit
This section provides simple instructions for powering an OHS unit on and off. The procedures differ
depending on the installed controller.
3.2.1 Shut-down Procedure
1. For E
2
equipped units, press and hold the Enter key for 3 seconds.
2. For all units, turn off power at the unit main power disconnect.
3.2.2 Start-up Procedure
1. Power on the unit at the main power disconnect.
2. ATech-equipped units will start automatically. For E
2
equipped units, if the controller is programmed for
automatic start, the unit will enter an operational state automatically; otherwise, a status message will
appear stating manual start-up is required. Press the Enter key to start the unit.