Therma-Stor Products Group XT150H - Manual (Page 5)

Install the remote control panel in a central area of the structure
where it will sense the relative humidity of the structure accurately.
Do not install the control panel where it may not accurately sense
the relative humidity such as near HVAC supply registers, near
exterior doors, or near a pool or spa. The installer must supply the
wiring between the Ultra-Aire XT150H 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
Ultra-Aire XT150H and the remote control panel or damage to the
transformer may result.
The remote controls of the Ultra-Aire XT150H 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 Ultra-Aire
XT150H and the remote control panels are numbered and color-
coded to prevent confusion. Some of the control wires leaving the
Ultra-Aire XT150H 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 Ultra-Aire XT150H before
making the control connections.
3.3 Condensate Water Removal
Condensate drains by gravity via the drain port. Use 3/4" male NPT
PVC pipe. Route drain pipe to drain. Install a trap if possible. Take
care when installing drain pipe to drain port. Use an adjustable
wrench to secure the drain port. An optional condensate pump kit
may be installed if a lift is required to dispose of the condensate.
The condensate pump kit can be ordered directly from the factory.
See the optional parts list for information on the kit.
3.4 Ducting
3.4A Installing Duct Collars
The Ultra-Aire XT150H is equipped with 10" and 6" round inlet
collars and a 10" round (ovaled) exhaust collar. Follow instructions
included with collars.
3.4B Ducting for Dehumidification
For the ideal installation, draw air from the central part of the
home and return it to the isolated areas of the home like the
bedrooms, den, utility room, or family room. The ductwork of the
existing heating system can be used to supply air to the home. If
the existing supply goes to isolated areas of the home, discharge
the supply of the Ultra-Aire XT150H into the supply of the existing
heating system. If the existing heating system incorporates a
central supply, installation of a separate supply duct from the Ultra-
Aire XT150H to each isolated area is recommended. DO NOT draw
air directly from the kitchen, laundry, or isolated basement. You
may draw air from a basement that is open to the home. All flexible
ducting connected to the Ultra-Aire XT150H should be UL listed.
The inlet of the Ultra-Aire XT150H is the 10" diameter hole in the
filter enclosure of the unit. A 10" round collar is supplied with the
unit to attach to round duct. The duct may be permanently attached
to the collar. A 6" round collar is provided with the unit to attach to
the 6" hole in the filter enclosure. The 6" collar should be capped
if fresh make-up air is not desired. If fresh make-up air is desired,
see Section 3.4C.
A 10" round (ovaled) collar is supplied with the unit for the outlet of
the Ultra-Aire XT150H.
A length of flexible ducting on all Ultra-Aire XT150H duct
connections is recommended to reduce noise and vibration
transmitted to rigid ductwork in the structure.
Ducting the Ultra-Aire XT150H as mentioned in Sections 3.4A-3.4G
requires consideration of the following points:
Duct Sizing: For total duct lengths up to 25', use a minimum 10"
diameter round or equivalent rectangular. For longer lengths, use a
minimum 12" diameter or equivalent. Grills or diffusers on the duct
ends must not excessively restrict airflow.
Isolated Areas: Effective dehumidification may require that ducting
be branched to isolated, stagnant areas. Use 8" or larger diameter
branch ducting to each of two or three areas, use 6" or larger to
each of four or more areas.
Connecting to existing HVAC systems: An optional 10" check
damper is available from the factory to prevent reverse flow
through the Ultra-Aire XT150H. If the Ultra-Aire XT150H is ducted
to the supply ducting air handler, it is recommended that the check
damper be placed in the Ultra-Aire XT150H supply duct. Contact
the factory when connecting to a static pressure of greater than or
equal to +.5" WG.
FOR HVAC INSTALLER ONLY
5 Ultra-Aire XT150H Installer’s & Owner’s Manual
1.00"
External drain trap on unit
is recommended