Complete Compiled Specification.pdf - Peck Ormsby Construction

secondary water differential temperature and water flow to the building.
E. The chilled water supply temperature shall be reset based on outside air temperature
according to the following schedule:
Outside Air Temperature CHS Temperature
95 0 F 45 0 F
55 0 F 50 0 F
F. Interface the BMCS with the chiller interface panel. Provide on-off control and monitoring,
CHS supply temperature control and monitoring, demand limiting and general alarm
monitoring.
4.7 VAV SUPPLY AIR FAN SYSTEMS
A. The air handler shall be equipped with supply fan; hot water preheat and chilled water
coils; angle filter bank; outside air and return air dampers.
B. Systems shall be individually started, stopped and controlled by the building energy
management system (BAS). Provide manual 0-6 hour override timers (2) located as
directed to provide local override of each fan system to the OCCUPIED mode.
C. Supply fan speeds are controlled by VFD's.
D. 0-2" w.c. supply duct static pressure transmitters located where shown on the plans and
acting through DDC controllers shall modulate each VFD to maintain required supply duct
static pressure. Duct static pressure shall be reset from zone requiring most cooling. Duct
static pressure transmitters shall have an accuracy of 2% or better.
E. A manual reset high limit pressure switch sensing discharge duct static shall shut down
the fan if its setting is exceeded.
F. Minimum Outside Air Control - The minimum outside air flow shall be controlled between
the upper and lower air flows by a CO2 sensor, If the CO2 level is below setpoint (800
PPM), the outside air dampers shall close to the lower air flow. The outside air dampers
and return air dampers will modulate to maintain the minimum air flow.
G. During the OCCUPIED mode and when the outdoor air temperature is below 55 F, a
DDC controller shall modulate the boiler water temperature and the outdoor air and
return air dampers in sequence to maintain discharge air temperature according to the
following schedule:
Outdoor Air Temperature Discharge Air Temperature
55 F 55 F
0 F 60 F
H. If the outside air temperature is above 72 F, the outside air damper shall close to the
minimum CFM position and the return air damper shall open correspondingly.
I. The amount of outdoor air passing through the outdoor air damper and the outdoor air
damper position shall be measured and displayed at the boiler room ATC panel.
J. A return air temperature sensor shall prevent the outdoor air damper from opening until
the return air temperature rises above 68 deg, F.
SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION
AUTOMATIC TEMPERATURE CONTROLS 15900-14