Carrier Em1 Manual

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3-8 u. Assemble, than attach liquid lines from the remote fil-
ter drier/sightglass assembly to the liquid line fitting
on the feed-thru-plate and the evaporator assembly
(See Figure 3-9).
v. Route suction line from the evaporator and discharge
line from the condenser per instructions provided in
Section 4, Hose Routing.
Note
Route the condenser electrical harness through
the feed-thru-plate before bolting on the con-
denser cover.
w.Bolt rooftop cover on to rooftop frame with hardware
supplied....

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3-9 m.Remove any debris from the hose cover and cut-out.
Apply a bead of sealant to bottom of the hose cover.
Rivet hose cover in place with 3/16 India. rivets.
n. Apply sealant to all the rivet heads and all areas open
to the interior to prevent water leakage.
o. Route suction line from the evaporator and discharge
line from the condenser per instructions provided in
Section 4, Hose Routing.Note
Connect the electrical harness that was routed
through the hose cover transition before bolting
on the...

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3-10 3.6 KR-4 ROOFTOP CONDENSER ASSEMBLY
The Carrier Transport Air Conditioning KR-4 condenser
is designed to be installed on the roof of the bus.
To install the KR-4 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.
Note
The ideal location will be close to the evaporator
inside the bus as well as spanning...

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3-11
Roof Bow
Center of condenser assembly center must contact bus roof
Figure 3-15 Condenser Mounted Without Mounting Channels
Roof Bow
Center of condenser assembly center must contact bus roof
Bus RoofMounting
Channel
Figure 3-16 Condenser Mounted With Mounting Channels
Roof Bow Roof BowApply sealant to unit mounting surface
and rivet heads to prevent water leaksBus Roof
Figure 3-17 Condenser Mounted Without Mounting Channels (Side View)
Apply sealant to unit mounting surface
and rivet heads to...

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3-12 3.7 CM-2 AND CM-3 STACKED CONDENSER AS-
SEMBLIES
The Carrier Transport Air Conditioning stacked
condensers are designed to be installed in the skirt of
the bus when there is insufficient room for a standard
installations.
To install Stacked Condensers utilize the following
installation procedures:
NOTE
The top and bottom condenser assemblies can
be assembled as one then installed as a com-
plete stacked condenser assembly to the bus
stringers.
CAUTION
Condenserassemblies must be properly...

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3-13
Front Bracket
Block-Off Plate
Air Inlet Bracket
Air Inlet Bracket
Figure 3-20 Stacked Condenser Assembly (Bus Skirt View) 

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SECTION 4
HOSE ROUTING
4.1 INTRODUCTION
All bus air conditioning systems use a network of
refrigerant hose and fittings to connect the major
components and carry the refrigerant gas and liquid
through the system.
4.1.1 Planning
Extreme care must be used when piping a bus. Plan the
routing of the hose prior to the installation, being careful
to avoid sources of high heat and sharp edges. If the
hose is routed near any heat source it should be
protected with a heat-resistant insulation. When...

T--3114-2 2. Determine what route the hoses will take. Take into
consideration there are going to be obstacles that
the hoses may have to be routed around, such as
seats, wheelchair lifts, windows, etc.
3. Lay out the hose cover backs in the position that they
eventually will be installed, and mark their position
(see Figure 4-- 3). Mark the sides and where they
stop at the floor and wall. This will give you an outline
where the holes for the hoses should be placed.
Figure 4--3 Hose Back Positioning...

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Figure 4--7 Hose Cover Back
Figure 4-- 8 Hose Cover Backs On Rear WallCaution
When drilling into the vehicle wall, always
use a drill stop to help protect against dam-
aging any wiring that might be located be-
hind the wall.
Installation Hint
To help keep hoses, harness, and drain lines
secure and in the center of the hose covers,
3/16 inch holes can be drilled in the hose cover
backs. Insert Tie-Wraps through the holes be-
fore securing the hose cover backs to the wall
(See Figure 4-- 14)....

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Protection
Figure 4--11 Hoses Routed Through Floor
A piece of scrap drain hose or heater hose, split down
the middle, can be used for protection.
11. After hoses and harness are protected, secure them
to the hose cover backs with the Tie-Wraps.
Figure 4-- 12 Hoses/Harness Secured With
Tie-Wraps To Hose Cover Back