June 99
parameters outlined in Article 2, provide the
perimeter heat for all locations where winter
outdoor temperature is -6C (20F) and lower.
With perimeter heat, the automatic temperature
control sequence can be set up to maintain the
desired set back temperature during unoccupied
hours of winter nights and holidays without turning
on the HVAC systems to do so. Provide the
perimeter heat by baseboard radiation or radiant
ceiling panels or other suitable terminal devices.
6.
Temperature Control Criteria: The automatic
temperature controls shall be direct digital control
(DDC) with electric or electronic operators for the
controlled devices. For relatively larger projects,
evaluate the use of pneumatic operators.
Evaluate the following control features and
incorporate them in the system design as
required:
a.
The temperature control strategy shall
depend upon the size and configuration of the
building. For smaller projects, in a cooling
mode, a single room or return air thermostat
shall start or stop the refrigeration
compressor(s) without requiring any
individual room temperature control. Control
the heating accordingly; by treating the HVAC
unit as a single zone. For large projects,
provide individual room temperature control
for the following areas:
1. Multipurpose Rooms (Conference
Rooms)
2. Office(s)
For larger projects, ensure that the perimeter
and internal spaces are not grouped together
as one temperature control zone.
b.
Heat miscellaneous spaces, such as,
vestibules, equipment rooms, and storage
spaces by thermostatically controlled
terminal heating units.
3.2
SPECIAL CONDITIONS:
VA Design Guide -- National Cemetery Administration
Page 5 -60
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