9
SECTION 1 - INSTALLATION
FORM 145.10-IOM4
ISSUE DATE: 2/27/2019
1
Supply
Air
Return Air
Filters
Return
Air
Low
Ambient
Damper
Condenser
Discharge
Condenser
Intake
When damper blades are fully open, en-
sure they do not contact the unit.
LD26857 LD26858
FIGURE 3 - VERTICAL UNIT DAMPER
1. Mount the pressure control panel in the compres-
sor/condenser section immediately behind the
compressor side access panel (see Figure 4 on
page 10 and Figure 5 on page 11). In hori-
zontal DSH units, mount the pressure control pan-
el to the interior base pan. In vertical DSV units,
mount the panel to the base rails. Fasten the panel
bracket to the vertical ange of the interior base
pan (recommended) or to the horizontal surface
of the pan using the provided self-drilling screws.
2. Using the pre-terminated two-wire harness (red
and white) from the kit, connect the pressure con-
trol panel to the microprocessor board's R and C
terminals that are located in the main electrical
panel of the condensing unit. The harness must be
fed through the electrical routing hole.
• On horizontal DSH units, the hole is located
at the intake end of the condenser coil (see
Figure 4 on page 10).
• On vertical DSV units, the hole is located at
the low voltage end of the electrical panel
(see Figure 5 on page 11).
3. Route the harness across the blower section of the
unit. For horizontal DSH units, route the harness
into the back of the electrical panel via the low
voltage entrance hole.
4. Using the self-adhesive mounts provided, secure
the harness. This ensures that the wiring is kept
well clear of the belt-driven blower and motor as-
sembly.
5. On the microprocessor board, connect the red
harness lead to the R terminal and the white har-
ness lead to the C terminal (see Figure 12 on page
15 and Figure 13 on page 16).
6. Within the compressor compartment, secure the
harness to the existing compressor wiring. Route
the terminated ends to the 2-pole terminal block
on the pressure control panel. Attach the termi-
nated harness ends to the appropriate terminals
(red-to-red and white-to-white).
PRESSURE CONTROL PANEL INSTALLATION AND WIRING
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