CEMP-E
TI 811-12
18 August 1998
(b)
The building area served by the AHU.
(c)
Type of temperature control system.
(d)
Types of coils (hot water, steam, electric, chilled water, etc.).
(e)
Types of damper controls (fixed, modulating, economizers, etc.).
(f)
Starter and motor type and size.
(g)
Start up and operational items associated with the system.
(h)
Summer/winter operational data.
(i)
Equipment constraints.
(j)
Valves.
Survey Sheet 1, Air Handling Unit Survey Observations, lists the noteworthy items.
in exterior zones of buildings and are typically sized to match the heat losses from walls, windows, and
(a)
The type of perimeter radiation system (steam, hot water, electric, etc.).
(b)
The building area served by the perimeter radiation system.
(c)
The type of temperature control system.
(d)
Start up and operational items associated with the system.
(e)
Kilowatt (kW) rating of the equipment.
Survey Sheet 2, Perimeter Radiation Survey Observations, lists noteworthy items.
(3) Boiler and Converter Systems. When central boiler systems provide heating to buildings via
steam to hot water or hot water to steam converters, the converter capacities (including any storage and
associated pump sizes) should be noted. On such systems, the UMCS will normally interface with the
existing control loop to regulate the temperature or pressure output of the unit. It is necessary to inspect
the control system to see what local control loops exist and if additional control valves will be required.
On most hot water systems, an important energy saver is outside air reset. The existing control systems
should be inspected to see if local reset controls already exist. On hot water systems, pumps should be
noted as candidates for UMCS controlled equipment. Survey Sheet 3, Boiler and Converter Survey
Observations, lists noteworthy items.
(4) Chillers and Compressors. When surveying chiller and compressor units it is important to
identify which unit serves which air handling units. This is necessary to know whether an air conditioning
compressor system is serving AHUs which can be shut down during unoccupied hours or AHUs which
condition critical areas where the chiller needs to provide cooling 24 hours a day (i.e., computer areas,
hospitals, mission critical facilities, etc.). The following information must be obtained:
(a)
The type of chiller or compressor system.
(b)
Rated capacity of the system.
(c)
The compressor and auxiliaries motor data.
C-8
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