5
3.5.4 Pre-conditioning Equipment
For the PSG to operate at peak efficiency, certain pre-conditioning
equipment may be required. When supplied by Parker, this equip-
ment should be installed per unit System Layout Drawing and unit
Electrical Drawings. Incorrect installation of such devices as cool-
ing coils or other equipment may alter system performance and
void the unit warranty.
3.5.5 Order of Installation
When the PSG is shipped in sections refer to the unit System Lay-
out Drawing for proper installation.
The PSG unit should be secured with appropriate hard-
ware by the installing contractor.
3.5.6 Leveling
As base-mounted sections are installed, each section should be
leveled to ensure proper drainage and mutual alignment. If a unit
is not level within 1/8” (front-to-back and side-to-side), place suit-
able Shims between unit and support structure surface. Shims
should run the entire length of the mating surfaces. Skidded sys-
tems should be level to within 1/8” per 4 feet of length and width.
3.5.7 Blowers with Vibration Isolators
Skid mounted units with blowers are normally shipped with vibra-
tion Isolators between blower and skid. Refer to Figure 4. These
assemblies are shipped with isolators in a restrained condition,
remove shipping bands.
3.5.8 Drain Pipe Connections
The PSG modular cabinet is supplied with drain connections refer
to unit System Layout Drawing. The number of drain connections
will depend on the PSG model. All PSG cabinet drain connections
should be connected to one main drain pipe with a drain trap and
properly sloped to the building drain pipe connection. Refer to Fig-
ure 5. Air passing through the system is under negative pressure.
A drain trap is required serving as a vacuum break and to assure
proper drainage during system operation. The trap “height is equal
to the system static pressure, plus three additional inches of water.
Cleanout plugs should be installed to the trap to facilitate cleaning.
If required per code a grease trap should be installed. Drain pipes
should be heat traced and insulated if particulate tends to solidify
at expected ambient temperatures. This precaution also applies to
drain and water pipes exposed to cold climates.
3.5.9 Wash Water Supply Connections
Wash water is required for systems with In-Place Cleaning, refer to
the unit System Layout and the In-Place Cleaning Owner’s Manual
for installation, operation and specifications.
3.5.10 Heating/Cooling Coils
For systems with heating or cooling coils, refer to unit System Lay-
out Drawing.
!
WARNING
3.4 Unit Storage or Delay to System Installation
If PSG installation is delayed for an extended period (one month or
more), protect system components as follows:
1. Store in a cool, dry location. Do not disassemble. Do not re-
move components.
2. Cover duct and unit openings with plastic sheeting and duct
tape; cover plumbing openings with plastic hole plugs.
3. Cover skidded systems with plastic sheeting and seal with
duct tape. Do not use black plastic sheeting. When removing
components from storage, check gaskets, seals and electrical
components for long term effects of exposure to moisture and
dust before proceeding with installation.
4. The system exhaust blower should be protected from the
weather. Failure to do so could damage the motor, bearings,
belts, and electrical components. The following are guidelines.
• Store in an area with no vibration.
• Cover blower with a tarp do not use a black tarp which
will promote condensation.
• Remove drive belts.
• Rotate fan wheel monthly
Also consult the blower manufacturer for storage and
start up recommendations.
3.5 Installing The System
Skidded PSG systems arrive from the factory ready for final plumb-
ing and wiring, with proper planning refer to Section 2, Installation
Planning final installation should be straightforward. When PSG sub-
assemblies are to be installed on customer’s structure, further in-
structions are in order.
3.5.1 PSG Systems
The majority of skidded systems are shipped with unicells and filter
installed. The system may be lifted into place without removing
the unicells and filter. However, when job circumstances and or
shipping requirements dictate, unicells and filters are shipped on a
separate skid. These components should not be installed until the
system is in place. Individual units should be rigidly mounted, with
front-to-back bearing support in the direction of airflow. Clearance
for plumbing access should be provided under each unit, refer to
Installation Planning. The PSG main drain pipe should have a drain
trap and multiple passes require drain connection(s) for each pass.
Structural field installed support channels should not interfere with
proposed plumbing and wiring. Where the PSG is to be suspend-
ed, refer unit System Layout Drawing. Do not support ducting,
plumbing or other field hardware from the PSG.
3.5.2 Inlet/Outlet Plenums
As supplied by Parker, transition plenums have all-welded seams.
Inlet plenums include baffle filters or aluminum media to promote
even air distribution across subsequent system components.
3.5.3 Motor/Blowers
Motor/blower assemblies installed in the field should be equipped
with vibration isolators and adequate structural support. When
supplied by others, the motor/blower assemblies should meet air
volume specifications to the PSG model; refer to unit System Lay-
out Drawing.
