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Following are optional features, select as needed
K.
[Reheat coil with factory installed modulating hot gas reheat
humidity control and is connected to the compressor.
L.
[Optional electric heater:] Electric heater shall be SCR control and shall be controlled by the
microprocessor controller. It shall include a temperature sensor with field adjustable set
point, located in the outdoor air stream after the heater. Heat output of the post-heater shall
be infinitely variable.
M.
[Optional indirect gas furnace]
- Shall be ETL Certified as a component of the Makeup Air Unit.
- Shall be constructed and configured to use [natural gas][LP gas].
- Shall have an integral exhaust gas blower
- Shall be ETL Certified for installation downstream of a cooling coil.
- Shall have 4-pass tubular heat exchangers, constructed of [aluminized steel][stainless
steel]
- [Shall be controlled by a microprocessor controller]
- Shall be encased in a weather-tight metal housing with intake air vents. Large, insulated
metal lift-off or hinged door shall provide easy access to the enclosed vest plate, control
circuitry, burner train, burner assembly and exhaust blower.
N.
[Factory installed motorized damper for Intake Air shall be of low leakage type.]
O.
[Dirty Filter Switch]
P.
[Fire Stat Type III]
Q.
[120V / 24V Smoke Detector]
R.
Sensors are considered to be part of various optional operational modes or device
controllers and are to be factory supplied and installed as specified by the A / E.
Sensors Installed by Factory
S.
[Curb Assembly:] A curb assembly made of 14 gauge galvanized steel shall be provided by
the factory for assembly and installation as part of this division. The curb assembly shall
provide perimeter support of the entire energy recovery unit and shall have duct adapters for
Supply Air. Curb assembly shall enclose the underside of the unit and shall be sized to fit
into a recess in the bottom of the MAUt. Contractor shall be responsible for coordinating with
roofing contractor to ensure curb unit is properly flashed to provide protection against
weather/moisture penetration. Contractor shall provide and install appropriate insulation for
the curb assembly.
T.
[Service outlet] 120 VAC GFCI service outlet shall be factory-provided and installed by this
contractor in a location designated by the A / E.
2.4
BLOWER SECTION
A.
Blower section construction, Supply Air: Belt drive motor and blower shall be assembled on
a 14 gauge galvanized steel platform and shall be equipped with [1.125 inch thick neoprene
vibration isolation devices][spring type vibration isolation] devices.
B.
Blower assemblies: Shall be statically and dynamically balanced and designed for
continuous operation at maximum rated fan speed and horsepower.
C.
Fan: Airfoil plenum fan statically and dynamically balanced, AMCA certified for air and sound
performance, mounted on ground and polished steel fan shafts with ball bearing pillow
blocks. Bearings shall be selected for a minimum L10 life in excess of 50,000 hours at
maximum cataloged speeds.
D.
Blower section motor source quality control: Blower performance shall be factory tested for
flow rate, pressure, power, air density, rotation speed and efficiency. Ratings are to be
established in accordance with AMCA 210, "Laboratory Methods of Testing Fans for Rating".
Product Specifications: Packaged Outdoor Heating and Cooling Make-Up Air Conditioners with Packaged DX (08/10)
Copyright © 2010 Greenheck Fan Corporation
Electric heater size / capacity shall be as specified by A / E.
valve]The reheat coil is for
See IOM /
Page 5 of 7
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