2
• Avoid discharging the air directly at people, or over
the water in pool areas.
• If used near a pool or spa, be certain there is NO
chance the unit could fall into the water or be
splashed and that it is plugged into a GROUND
FAULT INTERRUPTER.
• DO NOT use the DHV-150H as a bench or table.
• A drain pan MUST be placed under the unit if
installed above a living area or above an area
where water leakage could cause damage.
Place the DHV-150H on supports that raise the base of
the unit above the top of the flanges on the drain pan
beneath it. Raising the DHV-150H will help the unit drain
with gravity flow. Do not place the DHV-150H directly on
structural building members without vibration absorbers
or unwanted noise may result.
The DHV-150H may be suspended with steel hanger
straps (plumbers tape) or a suitable alternative from
structural members. Remember to place a drain pan
under the unit if it is suspended above a finished area or
above an area where water leakage could cause
damage.
The DHV-150H should be located near the existing air
handling system to minimize the required ductwork for
connecting the DHV-150H to the existing air handling
system. The controls for the DHV-150H are remote from
the unit and must be located in the space that is to be
conditioned. The controls are low voltage (24 volt) and
should be connected to the DHV-150H with low voltage
thermostat cable.
An external insulation kit is available for the DHV-150H.
This will prevent the cabinet from sweating if the unit is
installed in an unconditioned space. This kit will also
increase the efficiency of the unit by eliminating
unwanted heat transfer between the unit and the
unconditioned space. See the optional parts list for
information on the kit.
If fresh air ventilation is desired, thought should be
given to the location for the fresh air ducting. A 6” round
insulated duct will have to be installed on the DHV-
150H and run to the outside of the structure to bring in
fresh air. Use an 8” insulated round duct for lengths of
more than 50 feet or if more than 100 CFM is needed.
Consult local codes for necessary distances from
exhaust ports when installing fresh air return.
2.2 Electrical Requirements
The DHV-150H plugs into a common grounded outlet
on a 15 or 20 Amp circuit. It draws around 12 Amps
under normal operating conditions. If used in a wet area
(pool, spa room, or basement prone to flooding), a
ground fault interrupter protected circuit is required.
Install the remote control panel in a central area of the
structure where it will sense the relative humidity of the
structure accurately. Avoid installing the control panel
near HVAC supply registers, exterior doors, a pool or
spa. The installer must supply the wiring between the
DHV-150H and the control panel. Be sure to safely
route the control wiring to prevent damage during
installation. Be careful not to cross the wires when
connecting the DHV-150H and the remote control panel
or damage to the transformer may result.
The remote controls of the DHV-150H are powered by a
low voltage circuit (24 Vac) and must NEVER contact
or be connected to a high voltage circuit. The control
wires leaving the DHV-150H and the remote control
panels are numbered and color-coded to prevent
confusion. Some of the control wires leaving the DHV-
150H may not be used with certain control panels and
should be left safely disconnected with wire nuts taped
onto the stripped ends. Be sure to consult the electrical
schematic in this manual or inside the access panel of
the DHV-150H before making the control connections.
WARNING: DO NOT ALLOW THE YELLOW LEAD
FROM THE DHV-150H TO CONTACT THE RED
LEAD OR ORANGE LEAD FROM THE DHV-150H
OR DAMAGE TO THE TRANSFORMER WILL
RESULT.
NOTE: RESET THE VENTILATION TIMER BEFORE
ATTEMPTING TO PROGRAM AFTER INITIAL
INSTALLATION. THE TIMER MAY NOT OPERATE
CORRECTLY UNTIL IT IS RESET.
If an extension cord is required, it must have a
minimum of 12 gauge conductors if 25 feet long or less
and 10 gauge conductors if greater than 25 feet long.
2.3 Condensate Removal
Condensate drains by gravity via the clear hose
extending from the unit. Route the hose to a suitable
drain. Use care to keep the hose as flat to the floor as
possible, excessive humps will prevent proper
drainage.
If the DHV-150H is located too far from a drain for the
attached hose to reach, inexpensive 1/2" PVC pipe can
be used to extend it. It is commonly available in 10'
lengths from building supply, plumbing or hardware
stores. It will slide tightly inside the end of the drain
hose. If more than one length of pipe is required, they
can be joined with a short piece cut from the end of the
drain hose.