Rooftop Condenser Assembly; Rooftop Condenser Installations; Table 3-3 Roof--Mount Cond. Dimensions - Carrier Transport Air Conditioning Installation Procedures Manual

3.5 KR-4 ROOFTOP CONDENSER ASSEMBLY
The Carrier Transport Air Conditioning KR4 condensers
are designed to be installed on the roof of the bus. They
are available in single and dual loop configurations.
Refer to Table 3-3 for Rooftop Condensers dimensions.
Table 3-3 ROOF- -MOUNT COND. DIMENSIONS
Condenser Width
KR-2 37.86 inch
KR-3 50.11 inch
KR-4 52.75 inch

3.5.1 ROOFTOP CONDENSER INSTALLATIONS

To install the KR4 rooftop condenser utilize the following
installation procedures:
a. Select a location on the bus roof where the condenser
and/or mounting channels will span three roof bows.
(Three (3) are preferred, but never no less than two
(2) roof bows.
The ideal location will be close to the evaporator
inside the bus as well as spanning three roof
bows.
b. Remove the rooftop condenser from the shipping
box. Locate the two mounting channels (if used) and
mounting hardware.
Certain applications will not require the mount-
ing channels due to the contour of the bus roof.
c. Remove rooftop cover. Install the mounting rails (if
used) with the inclosed hardware. Refer to inclosed
installation drawing or see Figure 3-7.
Do not tighten the mounting channel hardware
at this time. They will have to be removed later.
d. Carefully place the condenser at the predetermined
location on the bus roof. Center the condenser side-
to-side on the bus roof. Determined if the mounting
channels are needed at this time. See Figure 3-8 and
Figure 3-9.
T--311
Height Length
9.25 inch 36.55 inch
9.25 inch 36.55 inch
7.25 inch 73.22 inch
Note
Note
Note
The Rooftop Condenser assembly must
contact the bus roof in the center. If not,
damage will occur. Consult factory as op-
tional mounting may be required.
e. Trace around both mounting channels or condenser
mounting surface. See Figure 3-7.
f. When installing the KR4, also trace around the loca-
tion where you will be attaching the feed-thru plate(s)
(See Figure 3-12 or Figure 3-13).
g. Remove mounting channels (if used) from condenser
assembly.
It is recommended that a drill stop be used
when drilling through the bus roof.
All 3/16 and 1/4 In. rivet engagement thick-
ness (grip range) must be between 0.080
and 0.625. Using rivets other than those
specified may allow the condenser assem-
bly to come loose from the bus roof.
h. If using mounting channels drill (6 places each rail)
13/64 In. Dia. holes thru the bus roof skin using the
mounting channel holes as a guide. Apply sealant to
the mounting channels or bus roof. Use 3/16 In. Dia.
steel rivets to attach mounting channels to bus roof.
Drill 17/64 In. Dia. holes thru the mounting channels
and bus roof bows. Apply sealant to 1/4 In. Dia. steel
rivets and rivet to the roof bows (minimum of two riv-
ets per roof bow). Apply sealant to the rivet heads and
around the mounting rails to prevent water leaks. At-
tach condenser to mounting channels using the en-
closed hardware. Torque to 20 Ft. Lbs. Refer to en-
closed installation drawing or see Figure 3-10.
i. If not using mounting channels, remove the condens-
er assembly to expose outline tracing. Apply sealant
where the condenser will be installed. Place condens-
er back over the outline tracings. Drill 17/64 In. Dia.
holes thru the bus roof skin (6 places each side) and
the roof bows (minimum of two rivets per roof bow).
Apply sealant to 1/4 In. Dia. steel rivets and rivet to
the roof and roof bows. Apply sealant to the rivet
heads and around the mounting rails to prevent water
leaks. Refer to enclosed installation drawing or see
Figure 3-11.
3--6
CAUTION
Note
CAUTION