TM 9-4520-257-12&P 0005 00 0005 00-6 Assembling The Stack For H-45 Type I (Solid Fuel) Heater Operation WARNING Ensure the stack pipe sections seat together securely. Poorly fitted stack sections may allow a hot stack to fall on the tent and start a fire or allow deadly carbon monoxide to leak into the tent. It is important to stake the exhaust stack securely. This will keep the exhaust stack vertical and seated firmly within the stack adapter with a downward force. This also stabilizes the heater and helps prevent it from being knocked over if bumped by equipment or people inside the tent. The tent needs to be securely staked to prevent the tent roof and walls from flapping during snowy and windy conditions. If the tent itself is not tightly staked, the roof and sidewalls can flap, getting close to the heater and creating a fire danger. (Refer to the tent-specific operator manual on the proper staking of the tent.) During operation, the H-45 heater produces harmful carbon monoxide and other gases. Carbon monoxide is a colorless, odorless, and tasteless gas. Remember that although carbon monoxide has no telltale odor, it may mix with other odors that mask its presence; therefore, carbon monoxide can be present within a mix of seemingly harmless odors. Mild cases of carbon monoxide poisoning can cause symptoms such as nausea, dizziness, or headaches. Severe cases of carbon monoxide poisoning can result in brain damage, heart damage, or death. To prevent carbon monoxide poisoning, ensure that the H-45 heater exhaust stack sections fit together snugly and that the exhaust gases are properly vented through the roof of the tent. Keep the H-45 heater in good working order. Ensure that all possible sources of carbon monoxide leakage have been repaired and that the operating space is well ventilated. NOTE All six stack pipe sections and stack cap assembly must be assembled, put securely in place on the top heater shell flange, and tied down during heater operation. Failure to use all six sections will adversely affect heater performance, increase soot buildup, and increase maintenance. The type of tent, use of a step aid (if available), and height and strength of the persons assembling the stack may alter the following stack assembly procedures. 1. When the H-45 Type I (Solid Fuel) Heater is first delivered, the stack assembly sections are provided as curved sheet-metal sections. All six stack sections must be formed into cylinders and their seams locked. Refer to the section entitled “Assembling the Stack Sections for the H-45 Type I (Solid Fuel) Heater” in WP 0009 00 for information on assembling the sections before initial use.
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