Specifications

147
NLUO PMC CONTRACTOR
SIGNATURE AND SEAL SIGNATURE AND SEAL SIGNATURE AND SEAL
1.7 Fan and Motor: ELECTRONICALLY COMMUTATED DRIVES
Fans: Unit must be provided with direct drive backward curved fans each running with DC drive electronically
communicated motors, the fans should be aligned and balance statically and dynamically. Low efficient front curved fans
which can generate only lower static pressures shall not provided. The EC Motors shall be with step less speed control. The
fan speed must be controlled based on the room return air temperatures and also must have automatic speed control without
manual intervention. The fans can be one /two/ three no’s as per the manufacturer’s standard. Units with latest innovative
EC fan technology with “COMPOSITE “Blade material (Radical Fans) is required to have power saving. Composite blade
EC fan saves more energy compared to Standard EC fan with aluminum blade. Units shall be factory balanced in
accordance with Section 15071, Mechanical Sound and Vibration Control. Only direct drive fans to be provided in offered
units and centrifugal fans with belt drive is strictly not acceptable. Noise Level: 70 db from 1 MT of unit in free filed
conditions.
1.8 Accessibility: Service Area:
• The unit shall be accessed from front which will be enabling to access all the main components of the machine from the
front for installation purposes and routine servicing. The unit shall be serviceable from the front with a maximum
service space required of 1 mtr.
1.9 Elecrical Heating
• The electric heating elements shall operate at a level not exceeding 60 KW / sqm. The low watt density elements shall
be of finned tubular nickel plated steel construction. The heating circuit shall include dual safety protection through loss
of air and high temperature controls.
2.0 Humidification
• Humidity shall be achieved by using Immersed-electrode type humidifier by which steam shall be produced and the
steam shall be distributed evenly into the bypass air-stream of the process cooling unit. The Humidifier operation should
have periodic flushing cycle. The Humidifier should guarantee a perfect efficiency with low energy consumption and
greater durability of components. The humidifier shall be fully serviceable with replaceable electrodes. Steam