Stulz E2 Series User Manual

STULZ E
2
SERIES CONTROLLER FOR PERIMETER SYSTEMS OPERATION MANUAL
9
Off by Internal Alarm - Unit is off due to a group
alarm condition. (Only active with grouped units.)
Off by Loss of Power - Displayed on units with
dual power sources and a power loss occurs. It is removed
when a switch over to a good power source occurs.
Off by Damper Failure - If equipped with a damper
and the damper failed to open.
Off by Shadow - If confi gured to be a shadow unit
and the main unit is off.
Off by Water Alarm- Water alarm as confi gured (I.E.
leak detected, CW/WG alarm, humidifi er alarm).
4. If damper control is enabled, a delay occurs to allow
the dampers to open before starting the blower(s). The
blower(s) are allowed to begin operating 20 seconds af-
ter Unit On appears, or after the damper enable delay
expires (if applicable). The STULZ logo in the display is
replaced with a blower symbol and a message Unit
ON NO Airfl ow appears.
Airfl ow is monitored by an air proving sensor. Appro-
priate airfl ow must be detected before the controller
outputs are enabled to perform cooling, heating, hu-
midifi cation and dehumidifi cation. Upon detecting a loss
of airfl ow, the controller shuts down all system outputs
(except the blowers and damper enable) and signals an
alarm.
5. When adequate airfl ow is detected, the status message "No
Airfl ow" disappears and the message "Unit On" remains in
the display. The controller automatically enables the con-
trol outputs as defi ned by the A/C system confi guration
and records the date and time power is re-initialized in the
alarm history log.
6. If the actual room conditions are not within the range of the
programmed setpoints, the system will begin operating in
the mode(s) needed to reach the setpoints (cooling heating,
humidifying or dehumidifying). Symbols (shown below) ap-
pear in the display to indicate the active operating mode(s).
= Blower On
= Cooling Enabled (Compressor 1)
= Cooling Stage 2 Enabled (Compressor 2)
= Cooling Stage 3 Enabled (Compressors 1b +2)*
= Cooling Stage 4 Enabled (Compressors 1a +1b
+2)*
(* Tandem compressor applications; see Section 4.11)
= Cooling Enabled (CW Based Units)
= Cooling Enabled (FC/AWS Based Units)
= Heating
= Two Stages of Heating
= Three Stages of Heating
= SCR Heat
= Humidifying
= Dehumidifying
= Compressor/Humidifi er/Heater Locked Out
= Compressor/Humidifi er/Heater Locked Out
by BMS
/ = CW Coil Flush Cycle On
NOTE:
Bar graph icons are used to indicate certain
proportionally controlled operating modes such as (CW
Cooling, SCR Heat and FC Cooling). The number of
bars appearing in the icon vary and provide a general
indication of the magnitude of the proportional output
signal controlling that mode. That is, four bars ( )
indicate a high output, two bars ( ) indicate a lower
output.
7. Temperature and humidity alarms are masked out for 30
minutes to allow for conditions to stabilize without triggering
nuisance alarms.
8. Operator interface to the display menu screens is available
from the Main screen by pressing the Program (Prg) key.
The controller starts a timer whenever a key sequence is
initiated. Every time a button is pressed, the timer is reset.
If there is no key activity for 60 seconds, the controller will
return to the Main screen.
3.4 Setpoint Adjustment
1. From the Main screen, access the Main menu screen by
pressing the program (Prg) key.
2. Scroll through the Main menu selections with the Up (
) and Down ( ) arrow keys and select the Control menu by
pressing the Enter ( ) key when "CONTROL " appears
in bold letters in the center of the screen. If no password
is active that allows the Control menu to be entered, a
password entry screen will be displayed.
3. To access the Control menu, press the Enter (
) key to
insert a fl ashing cursor in the "Enter Password" fi eld.

Stulz E2 Series Specifications

General

Brand	Stulz
Model	E2 Series
Category	Controller
Language	English