Quest IQ Compressor Wall OMM
10
September 2020
Layout and Components
The general layout and components location is the same for all HVAC systems of current type, however some may
vary, based on the HVAC system
’s specific
options
–
refer to submittal documentation. Pic. D.1 below shows
all/most available options, some of which may not be present on your HVAC system.
HVAC system Main Components
•
Main Blower
(1) is a supply fan array located next to the
Main Electric Panel
(2). Number of blowers may vary
based on airflow requirements. In the compressor wall design variation used by Quest, EC supply fans are
mounted to the fan wall.
•
Min Outdoor Air (OA) Opening
(not shown) has a motorized damper and filter(s). Motorized damper is used
to provide the option of space ‘purge’. I
t could be equipped with modulating actuator for automatic
adjustment of outdoor air intake.
o
Outdoor-installed HVAC system would have
louver(s)
(76) installed at the OA opening.
•
Min Exhaust Fan(s)
(EF)
Assembly
(not shown) (fan and motorized damper), while unlikely on a Quest
product, is technically possible. If provided, the EF assembly is located on the HVAC system
’s return air side;
Exhaust Air opening in outdoor-installed HVAC system is equipped with
louver(s)
(76) also.
o
Min Exhaust Fan Assembly is hinged and could be opened for better access to the fan electric box.
•
Economizer functionality (cooling/dehumidification) will be provided by the water-side economizer coil.
•
The
Main Filter Rack
(9) is typically face-loaded on each of the compressor modules on units not equipped
with economiser coils.
•
Refrigeration
Evaporator
coils (7) are located directly downstream from the
Main Filter Rack
(9) on each
compressor module.
•
Water/glycol
Reheat
coils (8) are located directly downstream of the compressor modules.
o
Current compressor wall design has a fixed bypass through each module.
o
Each compressor circuit has its own evaporator coil(s) set while all reheat coils are manifolded
together and serve all compressor circuits together.
•
Space heater
location, if the HVAC system is equipped with one, depends on the heater type:
o
Hot water coil
or
Electric heater
(11a) is usually located directly downstream of the
reheat
coil;
o
Gas heater
(not shown) is located downstream of the main blower(s).
