Mechanical Installation
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IM 926-3 • ROOFPAK APPLIED SYSTEMS
Mechanical Installation
NOTICE
The installation of this equipment shall be in accordance
with the regulations of authorities having jurisdiction and
all applicable codes. It is the responsibility of the installer
to determine and follow the applicable codes. Low head
pressure may lead to poor, erratic refrigerant feed control at
the thermostatic expansion valve. The units have automatic
control of the condenser fans which should provide adequate
head pressure control down to 50°F (10°C) provided the unit
is not exposed to windy conditions. The system designer
is responsible for assuring the condensing section is not
exposed to excessive wind or air recirculation.
WARNING
Sharp edges on sheet metal and fasteners can cause
personal injury.
This equipment must be installed, operated, and serviced
only by an experienced installation company and fully trained
personnel.
Receiving Inspection
When the equipment is received, all items should be carefully
checked against the bill of lading to be sure all crates and
cartons have been received.
If the unit has become dirty
during shipment (winter road chemicals are of particular
concern), clean it when received .
All units should be inspected carefully for damage when
received. Report all shipping damage to the carrier and file
a claim. In most cases, equipment ships F.O.B. factory and
claims for freight damage should be filed by the consignee.
Before unloading the unit, check the unit nameplate to make
sure the voltage complies with the power supply available.
Cabinet Weather Protection
CAUTION
Transportation, rigging, or maintenance can damage the
unit’s weather seal. Periodically inspect the unit for leakage.
Standing moisture can promote microbial growth, disease, or
damage to the equipment and building.
This unit ships from the factory with fully gasketed access
doors and cabinet caulking to provide weather resistant
operation. After the unit is set in place, inspect all door gaskets
for shipping damage and replace if necessary.
Protect the unit from overhead runoff from overhangs or other
such structures.
Recaulk field-assembled options such as external piping or
vestibules per the installation instructions provided with the
option.
Unit Clearances
Service Clearance
Allow an approximate service clearance as indicated in
. Also, Daikin recommends providing a roof
walkway to the rooftop unit as well as along two sides of the
unit that provide access to most controls and serviceable
components.
Ventilation Clearance
Below are minimum ventilation clearance recommendations.
The system designer must consider each application and
provide adequate ventilation. If this is not done, the unit will not
perform properly.
Unit(s) surrounded by a screen or a fence:
1.
The bottom of the screen or fence should be at least 1 ft.
(305 mm) above the roof surface.
2.
The distance between the unit and a screen or fence
.
3.
The distance between any two units within a screen or
fence should be at least 120" (3048 mm).
Unit(s) surrounded by solid walls:
1.
If there are walls on one or two adjacent sides of the unit,
the walls may be any height. If there are walls on more
than two adjacent sides of the unit, the walls should not
be higher than the unit.
2. The distance between the unit and the wall should be at
least 96" (2438 mm) on all sides of the unit.
3.
The distance between any two units within the walls
should be at least 120" (3048 mm).
Do not locate outside air intakes near exhaust vents or other
sources of contaminated air.
If the unit is installed where windy conditions are common,
install wind screens around the unit, maintaining the
clearances specified (see
). This is particularly
important to prevent blowing snow from entering the outside air
intake and to maintain adequate head pressure control when
mechanical cooling is required at low outdoor air temperatures.
Summary of Contents for RoofPak RPS Series
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