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Product Overview
The unit brings in fresh, outdoor air and removes
stale, exhaust air. Prior to discharging the exhaust air,
the energy recovery wheel transfers energy from the
exhaust air to the outdoor air at an efficiency of 70-
80%. Simply put, this unit preconditions the outdoor
air to save money on heating and cooling costs. This
particular unit also has cooling and heating options
available after the recovery wheel to further condition
the fresh air temperature if desired.
Cooling
Units have the following cooling options available:
• Chilled Water
• Split Direct Expansion (DX)
Heating
Units have the following heating options available:
• Hot water
• Electric
Optional Subassemblies
Dampers
There are two locations where dampers can be installed.
Low leakage or insulated low leakage motorized
dampers can be added in the outdoor air intake and/or
the return air intake. A backdraft damper is standard in
the exhaust weatherhood.
Filters
There can be two-inch thick MERV 8 pre-filters in the
outdoor airstream and MERV 8 filters in the exhaust
airstream.
Hot Water / Chilled Water Coils
Water coils can be used for a single purpose such
as heating or cooling, or their function can be
alternated between heating and cooling by changing
the temperature of the water flowing through the coil.
Depending on the application, it may be necessary to
use a glycol mixture to prevent the liquid from freezing.
The water coils are engineered to operate at pressures
up to 250 PSIG and temperatures up to 300°F, but
ancillary equipment such as valves and pumps will often
dictate lower operating temperatures. All water coils
are pressure tested at the factory with 450 PSIG of dry
nitrogen.
Split DX
The unit can be equipped with two evaporator coils
that will be connected to a separate condensing unit
(provided by others). Depending on controlling options,
the condensing unit will be controlled by others or could
receive a call for stage 1 and stage 2 of cooling with the
integral microprocessor controller. The microprocessor
controller will only provide a call for cooling, it will not
send a digital control signal to the compressors. Piping
components such as thermostatic expansion valve, filter
drier, sight glass, etc., shall be field-provided.
4
Model APEX Energy Recovery Ventilator
Electric Post-Heaters
The optional post-heater is used as a heat source for
the building and is integrated into the supply airstream.
A temperature sensor (with a field-adjustable set point)
is mounted in the supply airstream after the post-heater
to turn the post-heater on. A SCR heater allows for
an infinite amount of modulating control of the heat to
provide an accurate discharge temperature during the
call for heat.
As standard, the post-heater control panel is not single
point wired to the unit control center. Separate power
must be supplied to the post-heater disconnect (located
in unit control center). Electric heaters are available in
208, 230, 460, or 575 VAC (refer to heater nameplate for
voltage).
Installation
Unit Weights
Model APEX-200
Without coils
With Hot Water and
Chilled Water Coils
Recommended Roof Openings and
Curb Outside Dimensions
Roof Opening
Curb Outside Dimensions
All dimensions shown are in inches.
Return
W
Side of Unit
2.0
6.0
2.0
1.25
0.75
Roof Curb
Roof Curb Detail
Approx. Weight (lbs)
9,000
12,000
A
B
C
86
44
68 .75
L
W
283 .5
92 .0
Outdoor
Air
Air
Intake
Discharge
D
C
B
L
recommended
roof opening
Base
2 inches Insulation
D
44
A
2.5 inches
from inside
curb to
®
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