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Position and Install Panel
Position the panel almost par-
allel with the unit (figure 2, Detail D) with the screw side" as
close to the unit as possible. Then, in a continuous motion:
Slightly rotate and guide the lip of top tab inward (figure 2,
Details A and C); then upward into the top slot of the
hinge corner post.
Rotate panel to vertical to fully engage all tabs.
Holding the panel’s hinged side firmly in place, close the
right−hand side of the panel, aligning the screw holes.
When panel is correctly positioned and aligned, insert the
screws and tighten.
A − Control Box (Figure 3)
SSB*H4 units are not equipped with a 24V transformer. All
24 VAC controls are powered by the indoor unit. Refer to
wiring diagram.
Electrical openings are provided under the control box cov-
er. Field thermostat wiring is made to color-coded pigtail
connections.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect electronic com-
ponents. Take precautions during unit installation
and service to protect the unit’s electronic controls.
Precautions will help to avoid control exposure to
electrostatic discharge by putting the unit, the con-
trol and the technician at the same electrostatic po-
tential. Neutralize electrostatic charge by touching
hand and all tools on an unpainted unit surface be-
fore performing any service procedure.
FIGURE 3
DUAL CAPACITOR
(C12)
COMPRESSOR
CONTACTOR
(K1)
CONTROL BOX
GROUNDING
LUG
1 − Compressor Contactor K1
The compressor is energized by a single−pole contactor lo-
cated in the control box. See figure 3. K1 is energized by the
indoor thermostat terminal Y1 (24V) when thermostat de-
mand is present.
2 − Dual Capacitor C12
The compressor and fan in SSB*H4 series units use per-
manent split capacitor motors. The capacitor is located
inside the unit control box (see figure 3). A single dual"
capacitor (C12) is used for both the fan motor and the
compressor (see unit wiring diagram). The fan side and
the compressor side of the capacitor have different MFD
ratings. See side of capacitor for ratings.
CAUTION
In order to avoid injury, take precaution when
lifting heavy objects.
B − Two−Stage Scroll Compressor (B1)
FIGURE 1
TWO−STAGE MODULATED SCROLL
solenoid actuator coil
slider ring
The scroll compressor design is simple, efficient and re-
quires few moving parts. A cutaway diagram of the scroll
compressor is shown in figure 1.The scrolls are located in
the top of the compressor can and the motor is located just
below. The oil level is immediately below the motor.
The scroll is a simple compression concept centered around
the unique spiral shape of the scroll and its inherent proper-
ties. Figure 2 shows the basic scroll form. Two identical
scrolls are mated together forming concentric spiral shapes
(figure 3 ). One scroll remains stationary, while the other is
allowed to orbit" (figure 4). Note that the orbiting scroll does
not rotate or turn but merely orbits" the stationary scroll.
