Reassembly Of Split Units - Daikin RoofPak RPS Series Installation And Maintenance Manual

Reassembly of Split Units

Although RoofPak units typically ship from the factory as
complete units, they may be split at the factory in one of three
possible configurations.
1. The RFS air handler section and RCS condenser section
ship as two separate units, each with its own power
supply and unit nameplate. This configuration is ordered
when the condenser is intended to remain remote
from the air handler because of space or structural
constraints.
On all units except the RFS with end discharge,
refrigerant piping is stubbed out the exterior of the
cabinet for convenient field piping between the RCS and
RFS units, and all necessary refrigeration components
are provided. Detailed instructions starting on
2. The RPS/RDT unit factory split at the condenser ships
as an air handler section and a condenser section that
is recoupled together on the roof. This configuration is
ordered if a packaged RPS unit is desired, but cannot
go to the job site because of shipping length or weight
limitations. A single nameplate is attached to the air
handler section and power is fed to both sections through
the main control box, as in a non-split RPS/RDT unit.
Detailed instructions starting on
All interconnecting piping and refrigeration components
are provided so that when the sections are coupled
together, only field-provided couplings are required to
connect the piping.
3. The RPS unit factory split at the fan ships as two pieces,
split at the supply fan bulkhead, to recouple together
on the roof. Like the RPS/RDT unit factory split at the
condenser, this configuration is ordered if shipping length
or weight limitation prevents a packaged RPS/RDT from
being ordered. Splitting at the fan has the advantage
of leaving all factory refrigerant piping intact so field
evacuation and charging is not required.
A single nameplate is attached to the air handler section
and power is fed to both sections through the main
control box, as in a non-split RPS/RDT unit.
IM 926-3 • ROOFPAK APPLIED SYSTEMS
page 37.
page 28.
RPS/RDT Factory Split at Fan
Field reassembly of an RPS/RDT unit that shipped split at the
fan takes place in three phases:
(1) setting the sections,
(2) mechanically recoupling the cabinet, and
(3) reconnecting power and control wiring.
Phase I. Set sections
1. Remove top cap and save for Phase II, Step 1.
2. Remove screws on fan panel, leaving retainer clips in
place to secure bulkhead. Save screws for Phase II,
Step 5.
3. Remove plywood and retaining angles from unit and
discard.
4. Carefully lower both sections of unit (fan end and
discharge end) into place, making sure the roof curb
engages the recesses in the unit base.
Phase II. Reassemble cabinet
1. Reinstall top cap removed in Phase I, Step 1.
2. Caulk (watertight) ends of splice cap.
3. Caulk (watertight) vertical seam.
4. Install #10 screws (provided).
5. Install screws (0.25–20 × 0.75) removed in Phase I,
Step 2.
6. Install splice cover (provided).
28
Mechanical Installation
(Figure 43)
(Figure 44)
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