Adjusting Set Points - Carrier 48FP Controls Operation And Troubleshooting

Fig. 36 — Auxiliary Switch Stroke Adjustment
Fig. 37 — Auxiliary Switch Adjustment
1
2. Use / -in. straight blade screwdriver to make
8
adjustments.
Do not turn motor shaft by hand or with wrench. Damage
to the gear train will result.
3. Adjustments should be made to the blue cam only. The
pointer on the red cam should remain centered and at
the top, as this will deenergize motor no. 2 properly.
4. Each click of the blue cam changes the switch setting
by approximately 3 degrees of travel.
5. If motor no. 2 was energized too soon (Step 4 of the
test above was yes), turn blue cam one click to left (see
Fig. 37). If motor no. 2 was not energized (Steps 4 and
5 of the test above were no), turn blue cam one click to
the right (see Fig. 37).
6. Repeat the quick test.
7. Repeat Steps 5 and 6 as necessary until proper opera-
tion is observed.
8. Replace damper motor top cover.

Adjusting Set Points

SET POINT FUNCTION — The Set Point function allows
the user to view the current values set for the unit. From this
function, the user can change the values. See Table 46.
Reading and Changing Set Points — To change the set point
of a particular feature, enter the appropriate subfunction and
scroll to the variable desired. Once the desired variable has
been reached, type in the new value and press
value will appear in the display.
For example, the occupied cool set point is currently set at
the default value of 78 F. To change the occupied set point to
72 F:
1. Press
point function. The display will read OCSP 78.
2. Press
ENTER
Set points can be changed by the user provided that the val-
ues are within the allowable range for the input. If the input is
not within the allowable range, the original value will remain
displayed. See Table 47A and 47B for allowable ranges and de-
fault values.
To change the demand limit set points, the functions must
first be enabled in the field configuration subfunction. (See
Table 48 for more details on operation modes.)
(Set point) — The system set point subfunction dis-
plays the occupied and unoccupied heat and cool set points, as
well as the static pressure, supply air, and humidity set points.
(Loadshed set point) — This subfunction displays the
loadshed set point (in percent of unit capacity).
The demand limit/loadshed feature is activated by a redline
alert and loadshed commands from the CCN loadshed option.
Before any set points can be changed for demand limit, the user
must first log into the system. Refer to example below for de-
tails on how to log in.
To disable demand limit:
1. Press for the user configuration.
2. Press to scroll down until the display reads DLEN.
3. Press to disable the demand limit option. The
ENTER
display now reads DLEN DSB.
To use demand limit, first enable the demand limit option
(see example below), and then enter the loadshed set point.
NOTE: The demand limit function must be enabled in order to
function and may be turned off when its operation is not
desired.
47
. The new
ENTER
to enter the occupied cool set
and the display will read OCSP 72.