Electrical duct heater Heatrex Inc. 電氣管道加熱器heatrex Inc.
Characteristics
特點
Power source:
電源：
electrical
電
Description
描述
A job specification can be prepared by using the following information. Simply darken the applicable circles. Material which is part of the basic specification has already been darkened. Additional copies of this specification guide are available from your local Heatrex representative.
可以使用以下信息來編寫工作規范。簡單地將適用的界。材料是基本規格的一部分，已經被黑暗了。本規范指南額外的副本可從您當地的heatrex代表。
Duct heaters shall be Heatrex:
管道加熱器應heatrex：
Type TFHU Standard Slip-in heaters.
標準型tfhu滑加熱器。
Approvals – Heaters and panelboards (if required) shall meet the requirements of the National Electrical Code and shall be listed by Underwriters Laboratories for zero clearance to combustible surfaces and for use with heat pumps and air conditioning equipment.
批準-加熱器和配電盤（如果需要）應符合國家電氣規范的要求，應當由保險商實驗室列為零間隙可燃表面和用于熱泵和空調設備。
Heating elements shall consist of a coil, 80 nickel, 20 chromium, Grade A resistance wire, precisely centered in a stainless steel tube filled with granular magnesium oxide. A stainless steel fin is to be helically wound onto the tube. Elements are to be furnished with mounting flanges, making them individually removable through the terminal box.
加熱元件由一個線圈、80個鎳、20個鉻、一個電阻絲組成，精確地集中在一個不銹鋼管填充粒狀氧化鎂。不銹鋼翅片是螺旋纏繞在管。元件必須配有安裝法蘭，使其單獨可移動通過接線盒。
Heater frames and terminal boxes shall be corrosion resistant steel. Unless otherwise indicated, the terminal box shall be NEMA 1 construction and shall be provided with a hinged, latching cover and multiple concentric knockouts for field wiring.
加熱器和接線盒應為耐腐蝕鋼。除非另有說明，接線盒應符合NEMA 1建筑應設置鉸接，保持現場接線蓋和多個同心擊倒。
Electrical duct heater Heatrex Inc. 電氣管道加熱器heatrex Inc.