Connecting To Side-Mounted Evaporators; And Cm-3 Stacked Condenser Assemblies - Carrier Transport Air Conditioning Installation Procedures Manual

3.6.1 Connecting To Side-Mounted Evaporators

The preceding steps are for connecting a rooftop
condenser assembly to a rear mounted evaporator
assembly. The standard feed-thru-plate should not be
used with side mounted evaporators. Refrigerant hoses
should be routed between the inner and outer skins of
the bus ceiling and roof. When connecting to side
mounted evaporators utilize the following procedures:
When drilling into the bus ceiling and pulling the
refrigerant hoses, care must be taken to re-
move as little insulation as possible from the
bus ceiling.
j. Cut 4-1/2 In hole behind the side mounted evapora-
tor, or, if ducted system, within the duct area.
k. Use a fish-tape or wire to pull the liquid and discharge
lines up to the condenser assembly from inside the
bus.
The inside cut-out must be protected with trim-
lock or similar material to help keep the refriger-
ant hoses and harness from chaffing.
l. Connect the refrigerant hoses to the feed-thru plate.
m. Apply sealant to all the rivet heads and all areas open
to the interior to prevent water leakage.
n. Route suction line from the evaporator and dis-
charge line from the condenser per instructions pro-
vided in Section 4, Hose Routing.
Connect the electrical harness that was routed
through the feed-thru plate before bolting on the
condenser cover.
o. Bolt rooftop cover on to rooftop frame with hardware
supplied.
p. Clean condenser cover with a mild cleaning solution
and clear all debris from the roof of the bus.
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
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the bus when there is insufficient room for a standard
installations.
To install Stacked Condensers utilize the following
installation procedures:
The top and bottom condenser assemblies can
be assembled as one then installed as a com-
plete stacked condenser assembly to the bus
stringers.
Condenser assemblies must be properly
installed using graded hardware. The CM-2
condenser assembly requires at least 4
bolts and the CM-3 requires at least 6 bolts.
a. Install top condenser to the bus stringers (floor) as de-
scribed in paragraph 3.3
b. Assemble bottom condenser assembly to the top
condenser assembly with the hardware supplied in
the appropriate (2 or 3) stacked condenser kit. Refer
to the enclosed installation drawing or Figure 3-16
and Figure 3-17.
c. Place air inlet stiffener over air inlet bracket and
loosely attach to the top condenser assembly. Repeat
on other side of assembly.
d. Loosely attach air outlet bracket to top condenser as-
sembly. Repeat on other side of condenser assembly.
e. Attach bottom condenser assembly to top assembly
using the air inlet stiffener bracket, air outlet brackets,
and the required hardware.
f. Attach block-off plate to both air inlet brackets.
g. Slide air inlet bracket and block-off plate against the
bus skirt.
h. Tighten all bolts.
The CM-3 Condenser assembly requires the
installation of a front bracket. See Figure 3-17.
This bracket helps to support the bottom con-
denser assembly.
i. Install air inlet brackets to both sides of the condenser
and the block-off plate to the bottom.
j. Install condenser screens (2) to the bus skirt.
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