Quick Start Guide

Application Sheet 1 – Single Zone Using Internal Control
Figure 3 Wiring (shown without “disable with
AC” feature being used)
Parts Needed (additional parts may be required):
__ Model 1830/1850/1870 __ Thermostat wire
__ Insulated duct __ 20A Outlet (1870 only)
__ Duct fittings & hardware
__ Grilles (if required)
__ Drain Pan and Float Switch (if required)
Figure 1 Dehumidifier Ducted to HVAC System
Figure 2 Dehumidifier Ducted Directly
Sequence of Operation
The dehumidifier will automatically “sample”
the air by turning on its blower (and the HVAC
blower if this option has been wired – see
Figure 3), and measuring the relative humidity
(RH) once every hour. Sampling will also occur
when the RH setting is lowered using the UP or
DOWN buttons on the control.
During sampling, if the RH of the air is above
the setting the dehumidifier, the compressor
will turn on. The compressor, dehumidifier
blower and HVAC system blower (if on) turns
off when the RH of the air is 3% RH below the
setting.
HVAC EQUIPMENT
RETURN
SUPPLY
HVAC EQUIPMENT
RETURN
SUPPLY
HVAC EQUIPMENT
RETURN
SUPPLY
Main Return to Main Supply
Main Return to Main Return - Recommended
Dedicated Return to Main Supply or Return