UNT Controller—Unitary (UNT) Controller
11
The UNT120/121 low temperature rated controller must be installed in an
enclosure as suggested below, unless it is mounted within the enclosed,
low voltage electrical compartment of the mechanical unit being
controlled. The BZ-1000-7 enclosure is the common package for a
UNT120/121 mounted in the air stream or in the mixed air chamber of a
mechanical unit.
The BZ-1000-7 enclosure is the recommended size for optimum
performance of the UNT120/121. Venting the BZ-1000 enclosure
(possibly removing unused knockouts), using the AS-ENC100-0 or
EN-EWC10-0, or using a larger enclosure is recommended for
environments that regularly exceed 32°C (95°F).
The UNT120/121 series controller has the following dimensions:
•
165 x 163 x 56 mm (6.5 x 6.4 x 2.2 in.) H x W x D without enclosure
•
259 x 249 x 76 mm (10.2 x 9.8 x 3 in.) H x W x D with the
BZ-1000-7 enclosure
•
229 x 406 x 191 mm (9.0 x 16.0 x 7.5 in.) H x W x D with the
EWC10 or UNTxxx-101 version
Before installation, position the controller and enclosure on the proposed
mounting surface to ensure that the calculated mounting area is correct.
Precise distance measurements can be made between controller terminals
and sensor/actuator mounting points on the air handling equipment if the
equipment is in place. Confirm electrical power source and conduit
requirements at this time.
Note: You can install a UNT100/101, UNT110/111, or UNT140/141
series controller in a control panel, or in an AS-ENC100-0 or
EN-EWC10-0 enclosure. You must enclose the UNT120/121
series controller in a BZ-1000-7 enclosure or another enclosure of
comparable dimensions.
Mount the UNT in a convenient location using the predrilled mounting
holes. The controller must be mounted vertically on a wall or panel where
it can be easily wired through the enclosure cover. This also applies to
remote location packages.
Enclosures for
Mounting a
UNT 120/121
Positioning
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