Quest Engineering IQ Compressor Wall Series User manual

IQ SERIES
Compressor Wall
OPERATION AND MAINTENANCE MANUAL
QuestClimate.com
GROW ROOM HVAC

Table of Content
General Information ..............................................................................................................2
Document Scope........................................................................................................................................2
Contact Us..................................................................................................................................................2
Operating Safety (Warnings, Cautions, and Notes)...................................................................................2
Basic Information ..................................................................................................................4
HVAC system View and Options ................................................................................................................4
Air Conditioning Options –Outdoor Air Dry coolers (OAFC).....................................................................7
Equipment Specific Data............................................................................................................................9
Layout and Components ......................................................................................................10
HVAC system Main Components.............................................................................................................10
Control System.........................................................................................................................................13
Dry Cooler Layout and Components........................................................................................................14
Sequence of Operation ........................................................................................................16
Set Points .................................................................................................................................................16
Ventilation ...............................................................................................................................................16
Space Heating ..........................................................................................................................................16
Air Conditioning and Dehumidification ...................................................................................................16
Economiser Option (Eco-Coil)..................................................................................................................18
Basic Maintenance ..............................................................................................................19
Maintenance and Safety..........................................................................................................................19
Maintenance Key Points..........................................................................................................................19
Routine Maintenance Program ...............................................................................................................20
Specific Components Maintenance.........................................................................................................21
Dry Cooler Maintenance..........................................................................................................................22
Equipment Warranty ...........................................................................................................23

Quest IQ Compressor Wall OMM 2September 2020
General Information
Document Scope
This manual provides operation and maintenance information about the Quest IQ Compressor Wall HVAC system
and its operation.
Additional information regarding installation, maintenance, and equipment commissioning and auxiliary devices
(dry cooler, communication interfaces, etc.) is provided with the HVAC system and can also be obtained from the
manufacturer.
Contact Us
Quest
QuestClimate.com
For immediate assistance:
Phone: [phone] (Canada), 1-877-420-1330 (USA)
For unit commissioning, miscellaneous inquirieis, parts requests and warranty:
Email: [e-mail]
Operating Safety (Warnings, Cautions, and Notes)
FOR YOUR SAFETY: READ BEFORE PERFORMING ANY OPERATIONS, MAINTENANCE OR SERVICE TASKS!
Only qualified technicians should install, operate, maintain or service mechanical equipment
including current dehumidification system.
Read this manual before performing any tasks to familiarize yourself with the equipment as well
as with any potential hazards. Always exercise caution!
Beware of electrical power and high electrical voltage!
•Follow proper safety procedures –lockout, tagout, and other respective procedures
•Failure to follow safety procedures can result in serious injury or death
Beware of moving parts and hot surfaces!
•Make sure to stop all moving parts (fans, blowers, etc.) before accessing the equipment’s
internal compartments
•Be aware of hot surfaces (hot refrigeration, space heating pipes, coils, heaters, etc.)
Beware of high pressures and chemicals!
•HVAC systems, equipped with compressors, contain refrigerant under high pressure; oil is
also contained in the compressor and refrigeration circuit(s)
•Some HVAC systems may also contain other liquids such as glycol mixtures

September 2020 3Quest IQ Compressor Wall OMM
The following warnings, cautions, and notes appear throughout this manual and referenced documentation
whenever special care must be taken to avoid potential hazards that could result in equipment malfunction or
damage, personal injury, or death.
WARNING
Indicates a potentially hazardous
situation which could result in
serious injury or death if handled
improperly.
CAUTION
Indicates a potentially hazardous
situation which could result in
moderate injury or equipment
damage if handled improperly.
Note
Indicates a situation that could
result in equipment damage or
improper/ineffective operation if
handled improperly.
Attention: Installation and Service Contractors
WARNING! Any work (installation, start up, service, maintenance, repair, etc.) on any mechanical
equipment (HVAC system, dry cooler, etc.) must be performed in accordance with manufacturer’s
recommendations as well as submittal documentation, local Codes and Regulations, and appropriate field
practices. Failure to do so could result in personal injury, equipment damage or malfunction, and will void
equipment warranty. Only qualified and properly trained individuals should perform tasks on this equipment.
Attention: Maintenance Team
CAUTION. To ensure equipment longevity and proper and efficient operation, the HVAC system and its
auxiliary systems and devices (e.g. dry cooler) should be maintained properly and regularly. Failure to do so could
negatively affect premise comfort levels and people’s health. It could also lead to equipment damage,
malfunction, premature tear and ware and may void equipment warranty.

Quest IQ Compressor Wall OMM 4September 2020
Basic Information
HVAC system View and Options
Standard AG series HVAC systems are semi-custom: while basic concept and layout is the same, options and
specific systems and components layout and location may vary from one HVAC system to another. One of the
typical HVAC system arrangement is shown on Pic.C.1.
Pic. C.1

September 2020 5Quest IQ Compressor Wall OMM
HVAC system Options
•Indoor or outdoor installation.
oNote: Pic. C.1. shows outdoor model.
•Capacity (number of 2-stage compressor pods or modules) –(see HVAC system Optional Arrangement below
for more details):
o2-compressor modules AG-012 & AG-016
o3-compressor modules AG-020
o4-compressor modules AG-024 & AG-030
o6-compressor modules AG-036 & AG-045
o9-compressor modules AG-055
•Airflow/ductwork connection *. Pic. C.1 shows some options only; each option location availability depends on
the HVAC system installation (indoor or outdoor) and other options:
oReturn Air (RA) ductwork connection - top, bottom, end, sides.
oSupply Air (SA) ductwork connection –top, bottom, sides.
•Optional Space Heating - hot water coil, electric or gas heater **.
•Optional Economizer Coil –for additional cooling.
•Air Conditioning (AC)* –external water cooling or dry cooler (packaged or separate).
oNote: Pic. C.1 shows outdoor model with “packaged” dry cooler (mounted with the HVAC system).
“Packaged’ AC option is available for outdoor models only; alternatively, indoor and outdoor models
could be fitted for separate/remote AC option –remote dry cooler or other external cooling media
source.
* Some available options (tonnage, ductwork connections, AC options etc.) are shown. Refer to the submittal
and other relevant documentation for your HVAC system’s options.
** For specific details on space heating (hot water, gas, electric) option, refer to the submittal and other
documentation:
•Gas-fired duct heater can be installed internally (fitted inside the HVAC system at the factory).
•Electric heater or hot water coil, depending on capacity, model, size, etc., mounted internally. Refer to your system’s
submittal documentation.
Attention! Equipment Clearances and Dimensions!
CAUTION! For equipment proper operation, maintenance and service, respective clearances should be
maintained. Generally, 30” clearances to the equipment must be kept for the maintenance and service purposes.
For the specific required clearances information, as well as HVAC system overall dimensions, distances to pipe
connections, duct connections etc., refer to the submittal documentation.

Quest IQ Compressor Wall OMM 6September 2020
HVAC system External Systems Connection
Pic. C.1 shows provisions for external systems connections, including ductwork, electric power and control wires
and various piping connections.
Except for the condensate, all other piping systems are optional and may not be present in each HVAC
system
•Condensate Drain Line –bottom, side (through the HVAC system base).
•Air Conditioning (AC) Connection.
oPackaged AC option (outdoor HVAC system with outdoor dry cooler (OAFC) incorporated with the
HVAC system), does not require piping connection to external AC system or device.
Pic 1.C. shows packaged outdoor model with OAFC mounted at the end of the HVAC system;
alternatively, if requested, OAFC could be mounted on the roof of the HVAC system.
oRemote (“split”) AC option (indoor or outdoor HVAC system, connected to external cooled
water/glycol system or remote dry cooler) –side connection.
•Space heating (Hot Water connection) –bottom, side.
oSome connection location options for space heating pipe lines are limited to indoor installation only –
refer to submittal documentation
•Space Heating (Gas Heater connection, gas line). If the HVAC system is equipped with a gas heater (boiler, gas
furnace etc.) for space heating purposes, the gas line connection is to be brought to the gas heater directly.
•Electric Power and Control Connection. Electric power is normally brought to the HVAC system disconnect,
normally incorporated with main electric panel (see Pic. C.1). If HVAC system is not equipped with the
disconnect, power lines to be brought directly to the main electric panel.
CAUTION! Current manual shows general/default connections’ location. For details regarding specific HVAC
system’s connections (actual location, piping sizes and position dimensions, circuit type and flow direction etc.),
refer to the HVAC system’s submittal documentation as well as HVAC system’s labels and stickers.
NOTE. HVAC system MUST be equipped with a P-trap at the condensate connection for proper operation! If
HVAC system is requested from the factory without P-trap, one MUST be installed on site prior to HVAC system
being commissioned. Refer to the Installation Manual for details.
WARNING! Gas Line. The gas line must be installed in accordance with respective device documentation
(boiler, furnace, etc.) and local codes and regulations.

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Air Conditioning Options –Outdoor Air Dry coolers (OAFC).
Basic views of standard air conditioning options are shown on Pic.C.4 (below); standard combinations of the HVAC
system and dry cooler models (based on their capacities) are shown in Table C.1. Note, that depending on ambient
conditions, HVAC system may have different cooler provided with it - refer to the HVAC system’s submittal
documentation for more details.
Standard dry coolers used with this model of HVAC system is NG-V series,
composed of number of “two-coils-two-fans” blocks, based on required
capacity of the cooler:
•Dry cooler NG-V-12 (Pic.C.4, Fig.1) is composed of one such block;
NG-V-22 (Fig.2) composed of two such blocks etc. largest single dry
cooler, NG-V-62 (Fig.3) composed of six of them.
As an option, each block of dry cooler could be equipped with the pump package (as shown on Fig.1 for NG-V-12).
Table C.1
HVAC system
Dry cooler
AG012 & AG016
NG-V-11
AG020, AG024
& AG030
NG-V-21
AG036
NG-V-12
AG045 & AG055
NG-V-22

Quest IQ Compressor Wall OMM 8September 2020
Attention! Equipment Clearances!
Proper clearances should be maintained for adequate airflow and heat rejection! Generally, up to 36” side and
96” top clearances are required. For more information on clearances as well as equipment dimensions and other
details, refer to the submittal documentation.
Pic. C.4

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Equipment Specific Data
Specific information for individual HVAC systems is provided in the following methods:
Nameplate (Pic. C.5):the manufacturer tag
attached to the front of the system includes
the system’s most critical data:
General data including:
oSerial number
oHVAC system model
(nomenclature)
oDesign room conditions (air
temperature and humidity)
Operational data, including:
oRefrigeration (refrigerant type,
charge, etc.)
oElectrical/airflow (HVAC system
voltage, CFM, etc.)
oOther applicable data
(space/auxiliary heating features,
etc.)
Labels and Stickers: attached when applicable
to the exterior and interior of the HVAC
system to show:
External systems connections
location/direction
(space heating, cooling circuits,
condensate)
Air filter locations, quantity, and size.
Additional Info (warning, caution stickers, etc.)
Wiring Diagrams: attached to the interior side of the
HVAC system, depict HVAC system control and power
wiring.
Remotely installed cooler would have its specific information provided in similar manner (labels etc.).
Attention! Glycol Circuits.
Unless otherwise indicated, equipment fluid circuits (except for refrigeration fluid circuit) such as compressor
glycol loop, dry cooler etc., are normally filled/to be filled with water/glycol mixture; normally, rust inhibitor-
infused food-grade propylene glycol is used.
Glycol mixture concentration is normally shown on Main Label –refer as needed.
Note: The main label shown above is just an example.
Pic. C.5

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’. It could be equipped with modulating actuator for automatic
adjustment of outdoor air intake.
oOutdoor-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.
oMin 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.
oCurrent compressor wall design has a fixed bypass through each module.
oEach 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:
oHot water coil or Electric heater (11a) is usually located directly downstream of the reheat coil;
oGas heater (not shown) is located downstream of the main blower(s).

September 2020 11 Quest IQ Compressor Wall OMM
1
2
76
9
7
8
11a
21
24

Quest IQ Compressor Wall OMM 12 September 2020
Compressor Module (detailed; see Pic.D.1C).
•Each compressor module contains a Compressor (13), Plate heat exchanger (14), Evaporator Coil (15), and
other refrigeration components to complete a self-contained refrigerant circuit within each module. Each
module also includes a Control Module (17).
•Common to the compressor modules is the Glycol Pump (16a), that circulates water/glycol to reject
compressor-generated heat.
oMotorized water/glycol Reheat (79) and AC (80) valves’ opening position determines how much fluid
is diverted to respective coil(s) (reheat and dry cooler or external heat sink).
13
17
Pic. D.1C
14
15
16a
17
79
80

September 2020 13 Quest IQ Compressor Wall OMM
oControl sub-panel with Main Control
Board (not shown) and Operator Panel
(not shown) is normally mounted with the
Main Electric Panel (2) on the compressor
stand frame.
•Main Electric Panel (2) contains main
Disconnect (77), if one is installed, and
other electrical and control components
(contactors, fuses, control transformer
etc.).
•Packaged Dry Cooler (19), if HVAC system
is equipped with it, is normally mounted
at the end of the HVAC system, adjacent
to compressor compartment/supply air
end (see Pic. D.1D).
Control System
The HVAC system control system is composed of sensors, spread throughout the HVAC system, Main Control
Board, Operator Panel and other electric components, located in the Main Electric Panel.
Temperature Sensors (Pic. D.2):
a) Temperature sensors (thermistors) are used to monitor
various temperatures (air, water, compressor, etc.);
b) Combo sensor is used to monitor air temperature and
humidity.
Compressor operation is monitored with pressure sensors (Pic. D.3):
c) Pressure Transducers (only a single set of transducers on the lead
circuit only for information purpose, not used for control) and
d) Pressure Switches (fast-reacting backup safety).
Note. Sensors and safeties approximate location is shown on Pic. D.1B and
D.1C –refer as needed.
•RA Combo Sensor (21) measures temperature and humidity of the pool room air (Return Air) entering the
HVAC system. It is located at the return air ductwork connection to the HVAC system.
•SA temperature sensor (24) measures the temperature of the air leaving the HVAC system (supplied to the
premise). It must be located downstream of the space heater:
oSA temperature sensor of HVAC system, equipped with gas heater, would be composed of four
regular temperature sensors, installed in different points at supply duct connection, averaging
temperature reading.
19
Pic. D.1D
b
a
c
d
Pic.D.3
Pic. D.2

Quest IQ Compressor Wall OMM 14 September 2020
oEach compressor module is equipped with High and Low Pressure switchesTransducer and High
Pressure Switch to protect the compressor and control its operation.
Main Electric Panel, apart from devices listed above (control board, OP, etc.) also contains Voltage Monitor; some
optional control sensors and devices such as an air pressure differential sensor, current sensor(s). It may also be
located in main electrical panel or in the HVAC system in general.
Dry Cooler Layout and Components.
The general layout of AC options is shown on Pic.D.5 below with the dry cooler NG-V-12, equipped with additional
pump package (Fig.1) and NG-V-32 (Fig.2) as an example. While layout and main components are similar for all
applicable AC options, there are some deviations (number of fans, composition, etc.). Refer to AC Options Basic
View (Basic Information chapter) for additional information.
•Cooling (AC) coils (31) (where heat from glycol mixture is rejected to the ambient air) is mounted onto metal
frame, upstream (before) the fans (32), that pulls the air through the coils to absorb the heat.
oNormally, dry cooler would have multiple coils and fans. Cooler NG-V-12 (Fig.1), comprised of two
coils, mounted on the angle to each other, and two fans, presents a single block. Depending on the
capacity, cooler could be comprised of up to six such single blocks, stacked side by side on the same
frame and manifolded together –NG-V-32 is comprised of three such blocks.
•Cooler piping connections (33) are identified respectively (IN –OUT);
oIn some cases, dry cooler piping connection(s) may be located within pump package box (37), if dry
cooler is provided with one.
32
36
35
33
37
31
Pic. D.5
33
31

September 2020 15 Quest IQ Compressor Wall OMM
oPiping connection location may vary –refer to particular cooler labels, stickers, submittal and other
documentation.
•Electric power is normally to be brought to disconnect (35) (if cooler is equipped with such), which feeds it to
the electrical box (36), that contains cooler power and control apparatuses.
oDepending on dry cooler specifics, location of electrical box may slightly differ; in some cases,
electrical box may be incorporated into pump package or located on the opposite side of the dry
cooler.
Dry Coolers Pump Package.
Dry Coolers, if equipped with such option, would have a pump package box. Pic.D.6 below shows general layout of
pump packages, used for NG-V model dry coolers. Note, that the package could be mounted onto the dry cooler
directly (standard) or provided separately.
•Pump (38) establishes glycol mixture circulation through
the dry cooler and HVAC system;
•Expansion tank (39) compensates for temperature-
based glycol volume fluctuation;
•The pump package electrical sub-panel (40) contains the
pump package electrical power and control apparatuses.
•The pump package manifolds are usually equipped with
pressure gauges, automatic air venting valve, draining
and other valves.
Pic. D.6
38
40
39

Quest IQ Compressor Wall OMM 16 September 2020
Sequence of Operation
The HVAC system’s ventilation system establishes the required airflow through the HVAC system. The control
system compares air temperature and humidity to their desired values (set points) and proceeds to dehumidify,
cool or heat the recirculating air.
Set Points
The control system is constantly adjusting HVAC system operation to achieve and maintain said parameters within
couple degrees/percent of the set point.
•Grow room temperature and humidity set point may vary based on the pre-set schedule (“lights on”,
“lights off” etc.).
Note: Refer to the HVAC system’s main label for the design value of control parameters.
Ventilation
The main blower runs continuously, establishing required airflow. The main blower speed is pre-set via adjustable
variable signal.
HVAC system can control the outdoor air intake (OA1) damper and the external minimum exhaust fan (EF1) (to
bring outdoor fresh air in and to directs portion of return air outdoors, respectively).
•If such option is used, exhaust fan speed would be controlled, like the main blower, via adjustable (pre-set)
variable signals: the exhaust fan speed may vary depending on scheduled ventilation mode.
•Note. Externally installed Exhaust Fan(s) and Outdoor Air damper(s) could be also controlled by the HVAC
system control system for Exhaust/Purge purposes.
Space Heating
When premise air temperature drops below the set point, the HVAC system control system issues a call for Space
Heating Mode and engages space heater (electric heater, hot water coil with valve, gas boiler etc.) by sending space
heating signal, respective to space heater control type - on/off, variable (0-10VDC), etc.
Air Conditioning and Dehumidification
When premise air temperature goes over (exceeds) its set point, the HVAC system control system issues a call for
Air Conditioning Mode. Respectively, when premise air humidity goes over (exceeds) its set point, the HVAC
system control system issues a call for Dehumidification Mode. In some instances, these calls may co-exist.
To execute Dehumidification or Air Conditioning (Cooling) mode, control system, depending on current conditions,
would resort to available means of cooling or dehumidification.

September 2020 17 Quest IQ Compressor Wall OMM
Compressors
Whenever the compressor operates, the evaporator is always dehumidifying and cooling the return air. The heat
removed from the air at the evaporator, as well as the heat from the compressor's action, must be rejected to one
of three heat sinks: grow room (premise) air or outdoors. The control system will direct the heat to where it is
needed based on grow room air temperatures:
•If room air is needed to be warmed up –more heat is diverted towards reheat coil;
•Rest of the heat (if any) is diverted towards outdoors (dry cooler)
Compressor Circuit Operation
Piping schematic for compressor circuit is shown on Pic. E.2.
•Schematic shows single compressor module (additional compressor modules schematic is the same) and
common to all compressor modules’ glycol cooling circuit.
•Compressor operation below applies to all modules; compressors are staged –if first compressor’s capacity is
not enough to satisfy the call, second compressor will be engaged after certain time delay.
When a demand requires the compressor to operate, the following sequence occurs:
•Once blower operation, related safeties and timers are confirmed by the control system, following occurs:
oCompressor glycol pump starts, establishing cooling glycol/water flow through the compressor fluid
circuit - plate heat exchanger(s) and fluid cooling coils (reheat and/or dry cooler or external cooling
source).
oPump down solenoid valve opens and once pressure stabilizes, the compressor starts.
Pic. E.2

Quest IQ Compressor Wall OMM 18 September 2020
•Based on the premise air temperature, the Reheat and AC valves would adjust their opening position (open
more/close more), reducing or increasing fluid flow to and through the respective fluid coils:
Reheat and AC valves are controlled in the same manner with opposite effect: for example,
when AC valve opens 10% more, Reheat valve closes 10% more etc.
oif more heat is required by the room air, the Reheat valve opens more, and AC valve closes more, thus
diverting more fluid to the reheat coils (heat is rejected to the premise);
oif more cooling is required by the room air, the AC valve opens more, and Reheat valve closes more,
thus diverting more fluid to the dry cooler (heat is rejected outdoors).
oOutdoor dry cooler fans are engaged only if at least some fluid is diverted towards outdoor dry cooler
and compressor pressure is higher than pre-set level (see Outdoor Dry Cooler Operation below).
•Once demand for the compressor’s operation is removed (respective call is satisfied), the pump down solenoid
valve closes; once the compressor suction pressure reaches the pre-set pressure, the glycol pump and
compressor stop.
Outdoor Dry Cooler Operation.
Respective signal(s) are sent by control system to engage EC-type fans via a variable 0-10VDC signal (proportional
to the compressor head pressure level). Refer to the wiring diagram if/when needed.
If the dry cooler is equipped with the built-in pump package (to establish cooling fluid flow between HVAC system
and the dry cooler or to serve as additional/booster pump), the said pump is also engaged along with dry cooler
fans –pump would stay engaged while fans are engaged (regardless of the fans’ speed).
Economiser Option (Eco-Coil).
HVAC system, equipped with eco-coil and dry cooler, can take an advantage of economiser option and use outdoor
air to cool the premise without resorting to compressor operation.
•When Air Conditioning (cooling) mode is requested and outdoor air conditions warrant (outdoor air and,
respectively, cooling media in the dry cooler are cool enough), ECV (eco-coil mixing valve) would divert
cool media from dry cooler into eco-coil, thus cooling recirculating air without running the compressor.

September 2020 19 Quest IQ Compressor Wall OMM
Basic Maintenance
Although equipment is built for minimal service downtime, periodic preventative maintenance is required to
ensure maximum reliability, safety, and operating efficiency.
Maintenance and Safety
Only qualified/properly trained personnel should attempt to perform respective maintenance tasks.
•When it is necessary to work with live electrical components, have a licensed electrician or other qualified
professional perform the required task.
•Be properly trained and equipped. Some maintenance tasks may involve usage of power tools, chemicals, etc.
Refer to such tools and materials data (manuals, MSDS, etc.). Personnel performing such maintenance tasks
should be:
oProperly trained to handle such tools and materials safely
oEquipped with proper personal protective equipment
•Turn the power off. Before performing any maintenance, disconnect all electrical power, including remote
disconnect, and discharge all energy storing devices (VFDs, etc.) before servicing. Follow proper lockout
procedures to ensure that power cannot be accidentally restored. Failure to follow provided safety warnings
and labels could result in serious injury or death.
•Be aware of potential hazards. The equipment contains moving mechanical parts, components under high
refrigerant pressures and surfaces with high temperatures. Before entering the HVAC system and/or
performing any equipment maintenance work, make sure that all moving parts are stopped, and it is safe to
perform required task.
Maintenance Key Points
Here are some basic/key maintenance considerations, pertinent to all HVAC systems and their auxiliary systems:
•HVAC system in mechanical room. No chemicals should be stored in the same mechanical room where the
HVAC system is installed. Chemical fumes/off-gas can cause premature deterioration of the equipment.
oStore chemicals in a separate, well-ventilated room.
•Access to the Equipment. Ensure that the equipment is accessible (minimum clearances are maintained):
approaches to the HVAC system are not restricted/limited with materials in mechanical room (indoor
installed) or with snow (outdoor installed HVAC systems, OACC and OAFC).
•“MUST DO” maintenance task. Although all other maintenance tasks are as important, these two maintenance
tasks are the most common and most helpful:
oMaintain clean air filters (return, outdoor air filters, etc.). Make sure to replace dirty filters regularly.
oMaintain clean air-side coils (especially Dry Cooler). Make sure to clean coils regularly.
WARNING! To ensure equipment longevity and proper and efficient operation, the HVAC system and its
auxiliary systems and devices (e.g. dry cooler) must be maintained properly and regularly. It is recommended to
create a facility-specific Routine Maintenance Program.
Failure to maintain the equipment properly and regularly could result in personal injury, equipment damage or
malfunction and will void the equipment warranty.