Carrier 33ZCVAVTRM Specifications download pdf (Page 140)

OUTDOOR AIR TEMPERATURE SENSOR (Fig. 16-19) —

The OAT sensor must be located properly. For outdoor loca-

tions use sensor 33ZCSENOAT. For duct mounting in the

fresh air intake, use sensor 33ZCSENPAT. The sensor must be

installed immediately upstream from outdoor-air damper

where it will accurately sense the temperature of the outdoor

air entering the mixing box. See Fig. 16 and 17. For applica-

tions without economizer, the sensor may be located in the out-

door air duct near the outdoor-air intake (Fig. 17) or on the

exterior of the building (Fig. 16). The thermistor has a range of

–40 to 245 F and a resistance of 10,000 ohms at 77 F.

Do not mount the sensor in direct sunlight. Inaccurate read-

ings may result. Do not mount the sensor near the exhaust from

air-handling units or compressors, near leakage drafts of indoor

air, or near shrubbery or trees, or under direct water runoff.

If the sensor is installed outdoors, perform the following in-

structions. Install the

-in. conduit connector into the rear

opening. Tighten the conduit connector securely to prevent

water leakage into the assembly. Mount the assembly onto the

-in. conduit and secure by tightening the conduit nut. After

the sensor wiring is completed, secure the gasket and cover in

place using the screws provided with the cover. See Fig. 18.

If the sensor is to be mounted in the outdoor air duct, use the

33ZCSENPAT sensor which has a 2 x 4-in. by 1

-in. deep

electrical box. Remove the cover and enter the knockout from

the rear of the box. Install the sensor through the opening so

that the sensor leads are inside the electrical box. Secure the

sensor to the electrical box using a field-supplied

-in. con-

duit nut. Drill a

-in. hole in the outdoor-air duct about a foot

upstream of the outdoor-air damper. Apply a

-in. bead of sil-

icone type sealer around the opening and install the sensor

through the hole. Secure the electrical box to the duct using 2

field-supplied, no. 10 sheet metal screws. See Fig. 19.

FACTORY-INSTALLED CONTROLLER — The Premier-

Link™ controller is available as a factory-installed option on

some units. Additional terminal boards are provided for wiring.

Sensors and input devices are wired to terminal boards instead

of directly to the Premierlink controller. See Fig. 20.

Connect Discrete Inputs — If used, wire the dry con-

tact switches, compressor safety switch, and supply fan status

switch to the PremierLink controller. See Fig. 21 for wiring.

Fig. 16 — Outdoor Air Temperature Sensor

Installation — Located on Building Wall

(P/N 33ZCSENOAT)

RETURN

AIR

OAT

OUTDOOR

AIR

ROOF TOP

UNIT

Fig. 17 — OAT Sensor Location

in Outside Air Duct (P/N 33ZCSENPAT)

1 2 ... 135 136 137 138 139 140 141 142 143 144 145 ... 315 316

Comments to this Manuals

No comments

Carrier 33ZCVAVTRM Specifications Page 140

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 33ZCVAVTRM