1. ĐIỆN TRỞ SƯỞI ỐNG GIÓ RDIF – Commercial Insert Duct Heater

ĐIỆN TRỞ SƯỞI ỐNG GIÓ RDIF – Commercial Insert Duct Heater

Điện trở sưởi ống gió

RDIF – Commercial Insert Duct Heater-The Ruffneck™ RDIF Commercial Insert Duct Heater with finned tubular (Calrod® type*) elements is designed for use in comfort heating applications, such as make-up air heating, air pre-heating, air handling equipment, fan coils, terminal reheating, multi-zone reheating, heat pump auxiliary systems and return air heating. The finned tubular elements are constructed using a steel tube with a corrugated steel fin wrapped around it and brazed together, which increases the heat transfer surface of the element resulting in a lower operating temperature than the non-finned tubular element designs.

APPLICATION RDIF – Commercial Insert Duct Heater:

Ruffneck™ air duct heaters are for use in comfort heating applications.
Typical applications include:
• Make-up air heating
• Air pre-heating
• Air handling equipment
• Fan coils
• Terminal reheating
• Multi-zone reheating
• Heat pump auxiliary
systems
Type RDFF is a flanged duct heater with finned tubular heating
elements.
Type RDIF is an insert duct heater with finned tubular heating elements.
Type RDFT is a flanged duct heater with Incoloy® (non-finned) tubular
heating elements.
Type RDIT is an insert duct heater with tubular heating elements

FEATURRES:

Certified for use in ordinary (nonclassified) locations
Designed for use in commercial comfort heating applications
Finned tubular element increases heat transfer surface area resulting in lower operating temperature
Primary and secondary cutouts for overheat protection are standard on all models

STANDARD FEATURES:

Primary linear cutout: 160°F (71°C), 277/600 Vac, 25/10 amp
non‑inductive
• Secondary linear cutout: Manual reset complete with back-up
magnetic contactor on units under 300 V, 30 kW and less, 225°F
(107°C) 277/600 Vac, 25/10 amp non‑inductive
Optional Auxiliary Duct Heater Controls
These controls are available as factory installed on the duct heater or as
an EEMAC rated (specify) control panel for wall mount:
• Wall thermostats:
– T498A
– T6051A (1 stage)
– T6052A (2 stage)
– T921A (0 – 135 ohm)
• Duct thermostats”
– T675A (1 stage)
– T678A (2 stage)
– T991A (0 – 135 ohm)
• Bulb holders
• Silent contactors
• SCR controllers
• Sail switch
• Differential pressure switch
• Main disconnect
• Pneumatic electric switches
• ON-OFF switch
• Magnetic contactors
• Step controllers
• HRC fusing
• Control transformers
• Fan interlock relay
• Pilot lights