MRL
Series
Standards, Certifications, and Government Regulations
Installation of this tube heater must conform with all applicable local, state, and national specifications,
regulations, and building codes. Contact the local building inspector and/or fire marshal for guidance.
In the absence of local codes, the installation must conform to the latest edition of:
United States: National Fuel Gas Code, ANSI Z223.1 (NFPA 54).
Canada: CAN/CGA B149.1 and .2, Canadian Electrical Code C22.1
Copies of the standards can be viewed or purchased through their respective publishers.
Not For Use in Indoor Living Spaces. Installing this unit in residential indoor living spaces or sleeping
quarters, such as bedrooms, basements, or garages, may result in property damage, serious injury, or
death. This unit is approved for unvented outdoor use only.
Sprinkler Heads:
Fire sprinkler heads must be located at an appropriate distance from the heater to avoid accidental
discharge of the fire suppression system. This distance may exceed the published clearances to
combustibles (see Chart 2.2 on page 9). Certain applications will require the use of a higher classification of
sprinkler heads or relocation of the heaters. Chart 2.1 is derived from NFPA 13 Table 3-2.5.1. Some
manufacturers may supply sprinklers with temperature ratings that vary from the chart below. Consult the
manufacturer of the sprinkler heads and NFPA 13 for more information.
Chart 2.1
•
Sprinkler System Temperature Ratings
Classification
Ordinary
Intermediate
High
Extra High
Very Extra High
Ultra High
Ultra High
2.0
WARNING
!
Max. Ceiling
Sprinkler Activation
Temperature
Temperature
100°F
135°F - 170°F
150°F
175°F - 225°F
225°F
250°F - 300°F
300°F
325°F - 375°F
375°F
400°F - 475°F
475°F
500°F - 575°F
625°F
Safety
•
Standards, Certifications, and Government Regulations
Glass Bulb
Orange (135°F)
Red (155°F)
Yellow (175°F)
Green (200°F)
Purple
Black
Black
650°F
Black
7
Color
Fusible Link Color
Black or No Color
White
Blue
Blue
Red
Green
Orange
Orange
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