McQuay RCS User Manual

IM-738 Page 27
RPS Factory Split at Condenser
Field reassembly of an RPS/RDT unit that has shipped split at
the condenser takes place in three phases:
Phase 1. Setting the sections and mechanically
recoupling the cabinet.
Phase 2. Reconnecting refrigerant piping.
Phase 3. Reconnecting power and control wiring.
Phase 1. Setting the Sections and Cabinet
Reassembly
The steps required to set the unit and reassemble the cabinet
are shown in Figure 29, Figure 33 on page 30, Figure 34 on
page 30, Figure 35 on page 31, Figure 37 on page 32 and
Figure 38 on page 32. The following items should be noted:
1. Top cap on air handler section and wire cover on condens-
ing section must be removed before sections are set
together. Refer to Step 1 and Figure 29.
2. Piping brackets and clamps on both sections should be
loosened so refrigerant lines can be moved out of the way
to prevent interference and damage as the sections are set
together. Refer to Step 1 and Figure 29.
3. If unit is to be post-and-rail mounted on a structural beam
that runs the full length of the unit, Refer to Step 2 and
Figure 33 on page 30 (installation of condenser supports)
may be omitted. In this case, the bolts and lifting brackets
shown in Step 1 should be left in place.
Phase 2. Reconnecting Refrigerant Piping
All refrigerant piping required to reconnect the two sections is
provided so that, when the piping closures are cut off, piping
from the air handler and condenser sections will line up. Pip-
ing can then be connected using field supplied couplings.
Like the 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, the unit should be
inspected for line breakage or loosening of fittings, and it
should be pressure tested as described in the previous “Hold-
ing Charge” section which is under “RFS Air Handler and
RCS Condenser” above.
Leak testing, evacuation, charging the system, and refrigerant
charge requirements for the split-at-condenser unit should be
done per the procedures described in the “RFS Air Handler
and RCS Condenser” section above.
Note: Refrigerant charge requirements for the RPS/RDT
split-at-condenser can be determined from Table 5.
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.
Step 1. Set the main unit in place and prepare the unit for reassembly as shown in Figure 29.
Figure 29. RPS/RDT Split at Condenser Reassembly - Step 1
Note: RFS units with front discharge do NOT include refrigerant piping to the DX coil. Field piping is required.
R e m o v e T o p C a p a n d
s a v e f o r S t e p 4
R F S
A i r H a n d l e r
U n i t
L o o s e n p i p i n g c l a m p s
a n d m o v e p i p e s
t o p r e v e n t p i p i n g
i n t e r f e r e n c e d u r i n g
r e a s s e m b l y ( s u c t i o n ,
l i q u i d , a n d h o t g a s
b y p a s s l i n e s )
R C S
C o n d e n s i n g
U n i t
R e m o v e b o l t a n d
s a v e f o r S t e p 2
R e m o v e b o l t a n d
s a v e f o r s t e p 4
S e e S t e p 2
A f t e r m a i n u n i t i s i n s t a l l e d , r e m o v e
l i f t i n g b r a c k e t o n b o t h s i d e s a n d
d i s c a r d . S a v e b o l t s f o r S t e p 2 .
N o t e : W i r e c o v e r m u s t b e
r e m o v e d a n d d i s c a r d e d
b e f o r e u n i t s a r e
r e a s s e m b l e d .
R e m o v e p i p i n g c o v e r
a n d d i s c a r d . R e i n s t a l l
s c r e w s i n h o l e s t o
p r e v e n t w a t e r l e a k a g e .

McQuay RCS Specifications

General

Brand	McQuay
Model	RCS
Category	Air Handlers
Language	English