CEMP-E
TI 810-11
30 November 1998
(4) Delete the economizer controller from the interior door layout.
(5) Delete the signal selector and relays associated with the economizer controller from the back
panel layout.
(6) Delete the economizer controller terminals from the terminal block layout.
b. Control systems other than a single-zone control system can be modified to delete the
economizer mode by deleting additional devices as follows:
(1) Delete the mixed air temperature control loop and associated devices from the schematic.
(2) Delete the mixed air temperature controller and associated devices from the equipment
schedule.
(3) Delete the mixed air temperature controller from the interior door layout.
(4) Delete the mixed air temperature controller terminal blocks from the terminal block layout.
c. To show the results of the previously described procedures, the single-zone system shown in
figures 4-19a through 4-19j has been modified to show a single-zone, non-economizer control system as
figures 5-15a through 5-15j.
Figure 5-15a. Control system schematic for single-zone HVAC system without economizer control
mode.
Figure 5-15b. Control system ladder diagram for single-zone HVAC system without economizer control
mode.
Figure 5-15c. Control system equipment for single-zone HVAC system without economizer control
mode.
Figure 5-15d. Control panel interior door layout for single-zone HVAC system without economizer
control mode.
Figure 5-15e. Control panel back panel layout for single-zone HVAC system without economizer control
mode.
Figure 5-15f. Control panel terminal block layout for single-zone HVAC system without economizer
control mode.
Figure 5-15g. DDC control system schematic for single-zone HVAC system without economizer control
mode.
Figure 5-15h. DDC control system ladder diagram for single-zone HVAC system without economizer
control mode.
5-8
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