Wash. Admin. Code § 51-11C-40392 - Section C403.11-Mechanical systems outside the building envelope
C403.11
Mechanical systems located outside of the building thermal
envelope. Mechanical systems providing heat outside of the thermal
envelope of a building shall comply with Sections C403.11.1 through C403.11.3.
C403.11.1
Heating outside a
building. Systems installed to provide heat outside a building shall be
radiant systems.
Such heating systems shall be controlled by an occupancy sensing device or a timer switch, so that the system is automatically deenergized when no occupants are present.
C403.11.2
Snow- and ice-melt system
controls. Snow- and ice-melting systems, supphed through energy service
to the building, shall include automatic controls configured to shut off the
system when the pavement temperature is above 50°F (10°C) and no
precipitation is falling and an automatic control that is configured to shut
off when the outdoor temperature is above 40°F (4°C) so that the
potential for snow or ice accumulation is negligible.
C403.11.3
Freeze protection system
controls. Freeze protection systems, such as heat tracing of outdoor
piping and heat exchangers, including self-regulating heat tracing, shall
include automatic controls configured to shut off the systems when outdoor air
temperatures are above 40°F (4°C) or when the conditions of the
protected fluid will prevent freezing.
Notes
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