Specifications - Lord and Son Construction, Inc.

shall be made without prior approval of the Government. Any modifications
made to the system shall be incorporated into the Operations and Maintenance
Instructions, and other documentation affected.
1.10 SURGE PROTECTION
1.10.1 Power-Line Surge Protection
Equipment connected to ac circuits shall be protected against or withstand
power-line surges. Equipment protection shall meet the requirements of IEEE
C62.41.1, IEEE C62.41.2. Fuses shall not be used for surge protection.
1.10.2 Surge Protection for Transmitter and Control Wiring
DDC hardware shall be protected against or withstand surges induced on
control and transmitter wiring installed outdoors and as shown. The
equipment protection shall be protected against the following two waveforms:
a. A waveform with a 10-microsecond rise time, a 1,000-microsecond decay
time and a peak current of 60 amps.
b. A waveform with an 8-microsecond rise time, a 20-microsecond decay time
and a peak current of 500 amperes.
1.11 INPUT MEASUREMENT ACCURACY
Sensors, transmitters and DDC Hardware shall be selected, installed and
configured such that the maximum error of the measured value at the SNVT
output of the DDC hardware is less than 150% of the maximum allowable error
specified for the sensor or instrumentation.
1.12 BUILDING CONTROL NETWORK
The building control network shall consist of a backbone and one or more
local control busses as specified. The DDC system shall be an extension of
the existing Metasys ADX server. The application specific controllers used
for this project shall perfectly match the application specific controllers
used in the building 0308 building renovation.
1.12.1 Backbone Media
The backbone shall be a TP/FT-10 network in accordance with CEA-709.3 or an
IP network according to the following criteria:
b. The backbone shall be a TP/FT-10 network otherwise.
1.12.2 Control Network Requirements
The control network shall meet the following requirements:
a. The backbone shall have no control devices connected to it.
b. The backbone shall be installed such that a router at the Building Point
of Connection (BPOC) location as shown may be connected to the
backbone.
Section 23 09 23 Page 11