Carrier 16DF013-050 - Manual (Page 16)

SET POINT AND DIP (Dual In-Line Package) SWITCHES
(Fig. 13-16) — These switches are used to adjust chilled wa-
ter and hot water capacity control temperature set points (also
see Automatic Capacity Control section, page 31); to select
the type of remote control signal; to display temperatures of
the various machine temperature control sensors; and for serv-
ice selections.
Chilled/Hot Water Control Location — SW11 switch 2
(Fig. 16) determines whether the capacity controller will use
the chilled/hot water inlet nozzle sensor (UP position), or
the outlet nozzle sensor (DOWN position).
NOTE: DOWN is the typical selection.
Chilled Water Capacity Control Temperature Set Point — The
chilled water control temperature is determined by the set-
ting on SW2 (Fig. 13, right side). The settings are incre-
ments of 1° C (1.8° F) from 0° to 9° C (0° to 16° F), and the
control temperature is the SW2 setting above a base tem-
perature of 5 C (41 F), for an adjustable range of 5 to 14 C
(41 to 57 F). For example, a selection of 2 on SW2 would
be a setting of 2° C plus 5 C (7 C total) (3.6° F plus 41 F =
44.6 F total).
Hot Water Capacity Control Temperature Set Point — The
hot water control temperature is determined by the settings
on SW1 (Fig. 13, left side) and on SW10 switches 1 and 2
(Fig. 15). The SW1 settings are increments of 1° C (1.8° F)
from 0° C to 9° C (0° to 16° F). The SW10 1 and 2 selec-
tions are for a base temperature of either 40 C (104 F),
50 C (122 F), 60 C (140 F), or 70 C (158 F). The control
temperature is the SW2 setting above the selected base
temperature, for an adjustable range of 40 to 79 C (104 to
174 F). For example, a selection of 2 on SW1 and placing
both SW10 switches in the UP position would be a setting
of 2° C plus 70 C (72 C total) (3.6 F plus 158 F =
161.6 F total).
Chilled and Hot Water Temperature Limit Settings on SW9
(Fig. 14) and Capacity Control Response Speed on SW10
(Fig. 15) — The purpose and selection of these settings are
explained in the Automatic Capacity Control section.
Remote ON/OFF Signal — When the Local/Remote Opera-
tion toggle switch (Fig. 12) is in the REMOTE position, SW11
switch 1 (Fig. 16) will determine whether the remote signal
is to be a remotely powered on/off voltage signal to the ma-
chine control circuit (UP position), or is from machine con-
trol circuit power through remote dry contacts (DOWN
position).
Digital Temperature Display — The temperatures being mea-
sured by the machine’s analog sensors will be displayed in
°C by the 3-character indicator on the front of the control
panel when DIP switch 6 on SW11 (Fig. 16) is placed in the
UP position. Otherwise this switch should be left in the DOWN
position for normal operating status indication. The tem-
peratures will be shown in 8 sequential displays, with the
first of the 3 characters indicating the channel (sensor) and
the second and third characters showing the temperature. The
first 6 channels indicate temperatures of 0° to 99 C (32 to
210 F) directly, and the seventh indicates, by code, 0° to 200
C (32 to 392 F). See Table 7.
Indicator LEDs — Fig. 17 shows the status of the ma-
chine’s light-emitting diode (LED) indicator lights for DIP
switch 5 of SW11 (Fig. 16).
Table 7 — Digital Temperature Display Codes
FIRST CHARACTER SECOND AND THIRD CHARACTERS
CONDITION SENSED
CHANNEL NUMBER (TEMPERATURE IN °C)
0 00 to 99 Chilled/hot water leaving temperature
1 00 to 99 Weak solution leaving absorber temperature
2 00 to 99 High-stage generator vapor temperature
3 00 to 99 Chilled/hot water entering temperature
4 — Not used at this time
5 — Not used at this time
6 — Not used at this time
7 Code display High-stage generator leaving solution temperature
CHANNEL 7
TEMPERATURE CODE
SECOND CHARACTER
CODE
BASE
THIRD CHARACTER TEMPERATURE
C F
7
A 100 212
This is the unit of temperature
in 1° C increments (1.8° F) added to
the base temperature*
B 110 230
C 120 248
D 130 266
E 140 284
F 150 302
H 160 320
*Example: A display showing 7C3 means channel 7 measures 123 C (253.4 F).
SW1 — Hot Water Temperature Setting
SW2 — Chilled Water Temperature Setting
Fig. 13 — Load Water Temperature
Adjustment Switches
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