TempMaster OmniElite, Engineering Manual, Page: 9 / 80

9 TEMPMASTER
FORM TPM3-EG1 (518)
Modbus
™
Remote Terminal Unit (RTU) Communications – This communication option
is standard on every TempMaster OmniElite unit and can be used in lieu of the BACnet
communications (only one can be used at a time). See supplemental information for the
available control points.
FILTER OPTIONS
Filter Options –
Cleanable, carbon coated MERV 7 or pleated MERV 8 filters in an an-
gled rack are available. For higher filtration requirements, optional rigid filter racks are
available with 12-inch 65% MERV 11 or 95% MERV 14 efficient rigid filters. Two-inch pre-
filters are included with rigid filter options. The rigid filter rack option is available without
filter media where field-supplied filters are required.
OUTSIDE AIR DAMPER (OA) OPTIONS
Manual Damper – This option includes a manually adjustable outside air (OA) damper. It
is manually adjustable at the unit by setting a mechanical stop between 0–100%.
Two-Position – This OA damper option is controlled to two positions, opened and closed.
Determination of the damper position is based on the occupancy schedule. In the occu-
pied mode, the OA damper is positioned to the manually configured point (set by mechani-
cal stop). In the unoccupied mode, the damper is fully closed.
Modulating Economizer – This option includes modulating OA and return air (RA) damp-
ers that are software interlocked and positioned by fully modulating, solid state damper
actuators. Control of the damper is via a standard ambient OA dry bulb sensor, or optional
single or comparative enthalpy controls.
Airflow Measurement – Optional outside airflow measurement is available on units
equipped with a modulating economizer.
CO
2
Sensors –
Optional carbon dioxide (CO
2
) sensors for occupied space that operate
demand ventilation control opening OA dampers to ventilate building. The CO
2
sensors
can operate in a single or comparative control scheme.
Rain Hoods on Outside Air (OA) Intakes – For all options with OA intake openings, rain
hoods are provided as standard to keep moisture from entering the equipment. The rain
hoods are an integral part of the unit and are rotated into place at the job site.
RELIEF SYSTEM
Barometric Relief – Optional building air exhaust shall be accomplished through baro-
metric relief dampers installed in the return plenum. The dampers will open relative to the
building pressure. The opening pressure shall be adjustable via a spring tension adjust-
ment.
On/Off Powered Exhaust –
This option provides simple building pressure control. It can
be controlled via a building pressure signal, or via OA damper control.
This option is not
available for VAV units
.
Modulating Powered Exhaust with Damper Control – This option consists of a con-
stant-speed exhaust fan with a discharge damper that is modulated to control the flow
of exhaust air. The damper control logic is based on the building static pressure setpoint
within the single package unit controller. The static pressure transducer is provided in
the return plenum of the single package unit, and 5/16-inch or 1/4-inch plastic tubing and
static pressure sensor must be supplied by others and installed in a representative loca-
tion in the building.