
11 6 VAV-PRC011M-EN
DDC Controls
VariTrane™ DDC Retrofit Kit
A VariTrane DDC-UCM, an electronic differential pressure transducer, and a six-pin connector with
wiring for an actuator, make up the assembly of the retrofit kit. All are housed inside a metal
enclosure. For maximum flexibility, the kit is available with one of two actuators or without an
actuator. If a kit is ordered without an actuator, ensure the actuator used has 24VAC three-wire
floating control. Other accessories are available with the retrofit kit which include zone sensors,
flow bars (used with units without a flow sensor), power transformers, control relays, and E/P
solenoid valves.
Retrofit Kit Actuator
Specifications
Actuator Design
on-off/floating-point
Actuator housing
Housing Type-NEMA type 1
Housing Material Rating- UL 94-5V
Direction of Rotation
Reverse wires terminals 2 and 3
Angle of Rotation
Max 95º, adjustable with mechanical stops
Electrical Rating
Power Supply – 24 VAC ± 20% 50/60 Hz 24 VDC ± 10%
Power Consumption – 2 W
Transformer Sizing – 3 VA (Class 2 power source)
Manual Override
External push button
The retrofit kit provides the system advantages of VariTrane DDC controls to
building owners for existing systems. The kit can be applied when
converting from pneumatic or analog controlled systems to a DDC
controlled system. The kit may be used on existing single-duct units with hot
water and electric reheat (three stages), dual-duct units, and all fan-powered
units (both series and parallel) with hot water and electric reheat (two
stages).
This actuator is available with the DDC Retrofit Kit and is a 3-terminal,
floating-point control device. It is direct-coupled over the damper shaft so
there is no need for connecting linkage. The actuator has an external manual
gear release to allow manual positioning of the damper when the actuator
is not powered. A three-foot plenum-rated cable with bare ends will be sent
separately. The actuator is listed under Underwriters Laboratories Standard
873, CSA 22.2 No. 24 certified, and CE manufactured per Quality Standard
SO9001.
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