Therma-Stor Products Group UA-150H - Manual (Page 5)

careful not to cross the wires when connecting the UA-150H and the
remote control panel or damage to the transformer may result.
The remote controls of the UA-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 UA-150H and the
remote control panels are numbered and color-coded to prevent
confusion. Some of the control wires leaving the UA-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 UA-150H before making the control connections.
NOTE:
RESET THE VENTILATION TIMER BEFORE ATTEMPTING
TO PROGRAM AFTER INITIAL INSTALLATION. THE TIMER MAY
NOT OPERATE CORRECTLY UNTIL IT IS RESET.
A decorative picture frame is provided to cover the control panel. The
home owner may use their choice of picture frames.
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.
3.3 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. We do not call for a trap since there is an internal trap with
this unit.
If the UA-150H is located too far from a floor 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.
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 direct from the factory. See the optional parts list for
information on the kit.
3.4 Ducting
3.4A Installing Duct Collars
The UA-150H is equipped with 10” and 6” round inlet collars and
a 10” round exhaust collar. The 10” and 6” round inlet collars are
designed with tabs that fold inside the filter enclosure of the UA-
150H. The 10” round exhaust collar is attached to the UA-150H by
folding the tabs inside the end panel of the UA-150H.
To install the collars; Insert the tabs of the collar into the hole in the
filter enclosure and/or end panel of the UA-150H and fold the tabs
up to attach to UA-150H.
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 UA-150H 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 UA-150H 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 UA-150H
should be UL listed.
The inlet of the UA-150H 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.
The outlet of the UA-150H is located on the end of the unit. A second
10” round collar is supplied with the unit. Cut and remove the safety
grid, then bend the tabs on the collar inside the hole in the cabinet
end.
A length of 6 feet or more of acoustical flex ducting on the outlet of
the UA-150H will reduce air noise from the impeller fan. A length of
flexible ducting on all UA-150H duct connections is recommended
to reduce noise and vibration transmitted to rigid ductwork in the
structure.
Ducting the UA-150H 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
UA-150H. If the UA-150H is ducted to the supply of a high static air
handler the check damper may be placed in the UA-150H 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 150H Installer’s & Owner’s Manual