Daikin RoofPak RPS Series Installation And Maintenance Manual page 31

RPS/RDT Factory Split at Condensing Unit
Do not damage piping components while setting condensing
unit in place.
Support condenser unit by crane during when moving since
condenser support rail is not designed to withstand the heavy
lateral forces of a unit being slid over it.
Field reassembly of an RPS/RDT unit that has shipped split
at the condenser takes place in three phases: (1) setting
the sections and mechanically recoupling the cabinet, (2)
reconnecting refrigerant piping, and (3) reconnecting power
and control wiring.
Phase I. Set sections and reassemble cabinet
1. Before setting sections together, remove top cap on air
handler section and wire cover on condensing section.
See Figure 47. Discard wire cover.
2. Remove piping cover and discard. Reinstall screws in
holes to prevent water leakage.
3. Loosen piping brackets and clamps on both sections
so refrigerant lines can be moved out of the way to
prevent interference and damage as the sections are set
together. See Figure 47.
4. Physically rig the air handler section into place.
5. After air handler is installed, remove lifting bracket and
adjacent bolts on air handler unit (see
save for Step 7. Discard lifting bracket.
If unit is post-and-rail mounted on a structural beam
that runs the full length of the unit, leave bolts and lifting
brackets in place.
6. On condenser unit, remove bolts adjacent to lifting
bracket and save for Step 12.
7. Install condenser support on air handler unit as shown in
Figure 48. Fill unused holes in unit base with bolts saved
in Step 6.
If unit is post-and-rail mounted on a structural beam that
runs the full length of the unit, bolts and lifting brackets
were not removed. Omit this step.
8. Lower the condenser unit until nearly level with main unit.
See Figure 49.
9. Carefully shift condenser unit until it rests against the
main unit. See Figure
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CAUTION
CAUTION
Figure 47) and
49.
10. After condenser unit is set in place, install the top cap
saved
11. Caulk (watertight) ends of splice cap and vertical seam.
See Figure 50.
12. Install 1/2" bolt removed in Step 5. See
Step 1.
13. Install splice cover (provided), see
Phase II. Reconnect refrigerant piping
All refrigerant piping required to reconnect the two sections is
provided so when the piping closures are cut off, piping from
the air handler and condenser sections lines up.
1. Connect piping using field-supplied couplings.
2. As with RFS/RCS units, both sections of the RPS/
RDT split-at-condenser unit ship from the factory with
a holding charge. Before removing the piping closures,
inspect the unit for line breakage or loosening of fittings.
3. Perform pressure testing as described in the
Testing on page
4. Perform evacuation, charging the system, and refrigerant
charge requirements for the split-at-condenser unit per
procedures on page
NOTE: Use Table 11
refrigerant charge requirements for the RPS/
RDT split-at-condenser. Because no field-installed
refrigerant piping is required, the total charge per
circuit is the sum of the base R-22 charge and the DX
coil charge.
31 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Mechanical Installation
Figure
Figure 50.
38.
38.
through Table 15 to determine
47. in
Leak