Page 32 - DeltaT

AC Fan Control Systems

PT/4 Automatic/Manual Fan Control Systems

Delta “T” Systems
600-PT4 Automatic Ventilation
Control System
INSTALLATION &
OPERATION MANUAL

Project Number
Proprietary Material - All Rights Reserved - Delta “T” Systems, Inc. - Copyright 2009

Overview - The P/T4 Series Ventilation Control System Auto Mode: The P/T4 control system start sin Auto Mode
is a state-of-the-art digital ventilation control systems when the engines are started. When the P/T4 system
that has been designed and manufactured specifically switches to Auto Mode, the exhaust fan(s) speed is
for the rigors of the marine engine room. adjusted automatically as the temperature increases,
Delta “T” Systems has supplied thousands of the P/T4 measured by a sensor located within the engine room.
Fan Control Systems to vessels all over the world, and The intake fan(s) speed is controlled by an engine room
has added the features that the captains and ship’s pressure sensor. This sensor requires a sensing tube
engineers have requested to make the PT4 the control to the outside atmosphere as well as to the engine
system of choice for offshore vessels of every type. room space to measure the differential pressure. As the
engines demand greater volumes of air and the exhaust
The P/T4 may be run in automatic or manual mode. Nor-
mal operation is in automatic mode which goes into effect fan(s) flow increases and as temperature rises, the
as soon as the vessel’s engines are started. In Automatic intake fan(s) speed will increase to supply the required
mode, engine room temperature and combustion air intake airflow, thus maintaining the correct pressure and volume
are automatically controlled to optimum levels based on in the engine room under any conditions.
temperature and pressure. Quiet Run: Upon main engine shut down, the P/T4
The system includes a color touch screen Fan Control ventilation control system switches to the Quiet
Interface (FCI) and an integrated alarm output that can Run Mode which cools the engine room down at
be connected to a vessel’s central alarm system. Help a user specified fixed fan speed. Once the user
screens and simplified parameter and monitoring screens specified temperature has been reached, the fans
make operation and adjustment fast and easy. The will stop thermostatically.
P/T4 Series Systems allow the variable speed control of Manual Mode: In addition to the two automatic
two or more three-phase fans via a digital touch screen modes of operation there is also a Manual Mode. The
Fan Control Interface (FCI). Each system may be Manual Mode allows the operator to control the fans
configured to accept single or three phase AC input speed and direction independently for maintenance within
power to the ASDs (Adjustable Speed Drives), de- the engine room or unusual situations. This mode of op-
pending on the available power aboard the vessel. eration is not recommended for use when underway and
the main engines are running.

Delta T Systems, Inc. 858 West 13th Court, Riviera Beach, Florida 33404 561-204-1500 www.deltatsystems.com