Carrier 33ZCSECTRM Specifikace stáhnout pdf (Strana 7)

REMOTE TIMED OVERRIDE — Pressing the timed over-

ride button on the 33ZCT55SPT or 33ZCT56SPT sensors ini-

tiates a timed override. If the override is activated in a zone that

is using a network time schedule, then the override will be re-

ported to the global schedule. When using a global schedule,

all the zones assigned to that schedule will go occupied when

any of the space temperature override buttons are pressed by

the user. For zones that require individual override, those zones

are required to use a local schedule.

If the mode is currently unoccupied and the override func-

tion is activated, the mode will change to occupied for the peri-

od of time configured. The control will interpret a 1 to 10 sec-

ond button press as a user initiated timed override command.

If the override button is held for less than 1 second or more

than 10 seconds, the control will not enter override. If the over-

ride button is held for more than 60 seconds, a Space Tempera-

ture alarm will be generated.

SUPPLY AIR TEMPERATURE SENSOR (SAT) — The

SAT sensor consists of a thermistor encased within a stainless

steel probe. The probe is 6-in. nominal length. See Fig. 3. The

sensor has 114-in. of unshielded, plenum-rated cable (2 con-

ductors, 22 AWG). The range of the sensor is –40 to 185 F with

a nominal resistance of 10,000 ohms at 77 F. The sensor mea-

sures temperature with an accuracy of ± 0.36 F (0.2 C) from

0° to 70 C. The sensor is supplied with a gasket and two self-

drilling mounting screws.

PRIMARY AIR TEMPERATURE SENSOR (PAT) — The

PAT sensor consists of a thermistor encased within a stainless

steel housing with 5-in. of exposed length. See Fig. 4. The sen-

sor has 2 teflon insulated, stranded conductors (24 AWG). The

range of the sensor is –40 to 185 F with a nominal resistance of

10,000 ohms at 77 F. The sensor measures temperature with an

accuracy of ± 0.36 F (0.2 C) from 0° to 70 C.

Table 1 — Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Return-Air

Temperature Sensor, and Supply-Air Temperature Sensor

TEMP

(C)

TEMP

(F)

RESISTANCE

(Ohms)

–40 –40 335,651

–35 –31 242,195

–30 –22 176,683

–25 –13 130,243

–20 –4 96,974

–15 5 72,895

–10 14 55,298

–5 23 42,315

0 32 32,651

5 41 25,395

10 50 19,903

15 59 15,714

20 68 12,494

25 77 10,000

30 86 8,056

35 95 6,530

40 104 5,325

45 113 4,367

50 122 3,601

55 131 2,985

60 140 2,487

65 149 2,082

70 158 1,752

.39

.08

FOAM GASKET

.40'' O.D.

.250 ±.01Dia

5.5 ±.5

PLENUM RATED CABLE

114'' +/-6

3.90

3.00

.175 DIA

x .600

3.00

1.50

ø0.50

CLEARANCE HOLE

ENGAGEMENT HOLE FOR

MOUNTING SCREW (2)

Fig. 3 — Supply Air Temperature Sensor Dimensions

1 2 3 4 5 6 7 8 9 10 11 12 ... 43 44

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