Location Considerations; Drain Installation; Condensate Pump And Float Switch - Aprilaire 1872 Installation And Operating Manual

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LOCATION CONSIDERATIONS

• Allow sufficient clearance for filter removal and
to prevent airflow obstruction
• Electrical service access will require the removal
of the side panel shown� Allow sufficient space
for service on this side of the unit�

DRAIN INSTALLATION

The drain outlet on the dehumidifier can be hard piped using a 3/4" PVC Slip x 3/4" MNPT fitting and 3/4" nominal drain tubing or the provided 3/4"
MNPT x 3/4" hose barb fitting and 3/4" clear PVC tubing can be used to drain the dehumidifier� Always maintain a constant downward slope from the
dehumidifier to the drain and do not allow soft tubing to curl up which may result in air lock� Note: PTFE thread seal tape is recommended for the
threaded connection and hand tighten only� If hard pipe is used, PVC primer and cement is recommended for the slip fit connection�
A level surface is required to ensure proper drainage from the dehumidifier�
Always install the dehumidifier in a condensate pan when locating in or above a finished space� Adhere to local codes regarding draining of the
condensate pan�

CONDENSATE PUMP AND FLOAT SWITCH

If a condensate pump is needed, install it in the condensate pan if
installed�
Install a condensate overflow safety switch (i�e� float switch) in the
condensate pan, remove the factory installed jumper wire between
the Float Switch terminals on the control and wire the float switch to
the dehumidifier as shown in FIGURE 3� Overflow safety switches on
condensate pumps can be wired to the Float Switch terminals in a
similar fashion�
FIGURE 2 – FILTER ACCESS CLEARANCE
ELECTRICAL SERVICE ACCESS THIS SIDE
6 FT. POWER CORD
TOP VIEW
FIGURE 3 – FLOAT SWITCH WIRING
20"
MINIMUM
FILTER
CLEARANCE
FOR FILTER
(EITHER SIDE)
NORMALLY CLOSED
FLOAT SWITCH
6" MINIMUM
CLEARANCE
FOR PROPER
AIR FLOW
90-2020
90-1857
3

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