MrCool MHWH199NC U Series, Руководство по установке

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NOTE
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Measuring Vent Length
Vent
Size
Max. Equivalent Lengths
Length
2 in 60 ft (18 m) Reduce the maximum vent length accordingly for each elbow used:
• Each 90° elbow equates to 5 linear ft. (1.5 m) of vent length.
• Each 45° elbow equates to 2.5 linear ft. (0.8 m) of vent length.
• The number of 90° elbows cannot exceed 7.
• The number of 45° elbows cannot exceed 14.
NOTE: The use of a PVC or polypropylene concentric termination counts as 5 linear feet (1.5 m) of vent.
The maximum vent length when using 2 in. exhaust ducts is 60 ft (18 m). The intake duct
length may be identical to the exhaust duct length. One foot straight pipe and an 90° elbow
are not included in the vent length. The maximum vent length is reduced by the number of elbows used, as
shown in the table below:
When the exhaust pipe is too long, the gas load will be reduced due to the influence of
air resistance.
DO NOT
exceed the maximum length of the vent. Excessive length may result in heater
shutdown and property loss.
DO NOT
make the exhaust pipe shorter than the minimum length allowed. If the length of the
pipe is too short, the exhaust gas generated by gas combustion could enter into the air inlet of
the machine, which could lead to incomplete combustion, and result in heater failure,
property loss, personal injury, or death.