Northern Railway Tender

Supply & Installation of Interconnecting refrigerant pipe work with (19mm/13mmthick) 30 closed cell elastomeric nitrile rubber tubular insulation between each set of indoor & outdoor units as per specifications, all piping inside the building shall be properly supported with MS hanger. 22.2 mm O.D (Insulation19 mm)

Supply, fixing, testing and commissioning of 380mm sweep, 1400 rpm (approx) propeller type exhaust fan complete as per IS, IE rule & site requirement. Make Usha, Orient, Bajaj or equivalent.

"Wall mounted (Highwall type) unit without drain pump": All indoor units as specified shall have; in general, noise levels less than 48db. For critical applications requiring noise levels below these limits,indoor units should be designed accordingly to meet noise level requirement. i) Each unit shall have electronic control valve to control refrigerant flow rate respond to load variation 27 of the room. ii) The address of the indoor unit shall be set automatically or through central controller in case of individual and group control. iii) The fan shall be Turbo, multi-blade type, statically &dynamically balanced to ensure low noise and vibration free operation of the system. The fan shall be direct driven type,mounted directly on motor shaft having support from housing.iv) The cooling coil shall be made out of seamless copper tubes and having continuous aluminum fins. The fins shall be spaced by collars forming an integral part. The tubes shall be staggered in the direction of air flow.The tubes shall be hydraulically/mechanically expanded for minimum thermal contact resistance with fins. Each coil shall be factory tested at 600psi minimum (or as recommended by OEM) air pressure under water. v) Indoor unit shall have cleanable type filter with mould resistant resin net fixed to an integrally moulded plastic frame. The filter shall be slide in and neatly insert able type. It shall be possible to clean the filters either with compressed air or water. vi) Each indoor high wall unit shall be with corded/ cord less remote controller as standard features. The controller shall be able to change fan speed and angle of swing flap(for high wall) individually as per requirement. vii) Al lindoor Units should have force shut option to connect with fire alarm adaptor, so that the unit can be integrated with other systems to stop automatically such as in case of fire. (viii)High wall indoor units with corless remote to be supplied and confirming to specification at TechSpec-I. 1.6 TR/438CFM