Water Furnace SAH Series Installation Manual page 6

SAH AIR HANDLER INSTALLATION MANUAL
General Installation Information cont.
Air Handler Sizing Selection
The SAH Air Handlers are designed for R410a refrigerant and should be matched with Indoor/Outdoor Split series
compressor section from your manufacturer according to the table below.
Air Handler
SAH022***1*R1S1*
SAH026***1*R1S1*
SAH030***1*R1S1*
SAH036***1*R1S1*
SAH036***1*R1S1*
SAH042***1*R1S1*
SAH048***1*R1S1*
SAH048***1*R1S1*
SAH060***1*R1S1*
SAH060***1*R1S1*
SAH066***1*R1S1*
SAH066***1*R1S1*
Moving and Storage
If the equipment is not needed for immediate installation it
should be left in its shipping carton and stored in a clean,
dry area. Units must only be stored or moved in the normal
"up" orientation.
Unit Location
Locate the unit in an indoor area that allows for easy
removal of the filter and access panels (the air handler
units are not approved for outdoor installation). Location
should have enough space for service personnel to perform
maintenance or repair. Provide sufficient room to make
refrigerant, electrical and duct connections. If the unit is
located in a confined space, such as a closet, provisions
must be made for return air to freely enter the space by
means of a louvered door, etc. The air handler section may
be installed on any level surface strong enough to support
its weight. When installed in a closet or on a stand, it should
be mounted on vibration absorbing material slightly larger
than the base to minimize vibration transmission to the
building structure.
When installed in an attic or above a drop ceiling, the
installation must conform to all local codes. If the unit
is suspended and installed in the horizontal position,
the entire length of the unit should be supported. If the
application requires the air handler to be installed on the
attic floor then the unit should be set in a full size secondary
drain pan. In this case the secondary drain pan should be
set on top of a vibration absorbing mesh. The secondary
drain pan is usually placed on a plywood base.
A secondary drain pan should be used when equipment
is installed over a finished living area to provide
protection from water damage in case of plugging of
the air handler primary drain line. The secondary drain
Indoor Split Model
(Single) Split Model (Dual Capacity)
022
-
030
036
-
042
048
-
060
-
070
-
Indoor/Outdoor
-
026
-
-
038
-
-
049
-
064
-
072
line should terminate somewhere that is easily visible by
the homeowner. Be certain to show the homeowner the
termination location of the secondary drain line and to
explain its purpose.
Duct System
Many of the problems encountered with heating and
cooling systems can be linked to improperly designed or
installed duct systems. It is therefore highly important for
a successfully operating system that the duct system be
designed and installed properly.
The duct system should be sized to handle the design
airflow quietly and efficiently. To maximize sound
attenuation of the unit blower, the supply and return
plenums should include an internal duct liner of fiberglass or
constructed of ductboard for the first few feet. On systems
employing a metal duct system, canvas connectors should
be used between the unit and the ductwork. If air noise or
excessive airflow is a problem, the blower speed can be
changed. When installing a central air return grille in or near
the living space, it is recommended to design the ductwork
so that the grille is not in direct line with the return opening
in the air handler. One or two elbows will also assure a
quieter installation and system. Application of the unit to
un-insulated metal ductwork in an unconditioned space
will cause poor unit performance and allow condensation
to form on the duct and possibly cause damage to the
structure.
If the unit is connected to existing ductwork, check the duct
system to ensure that it has the capacity to accommodate
the air required for the unit application. If the duct is too
small, as in the replacement of heating only systems, larger
ductwork should be installed. All existing ductwork should
be checked for leaks and repaired as necessary.
6
Rated
Electric Heat (kW)
Airflow(CFM)
800
850
1000
1200
1200
1300
1500
1500
1800 10, 15, 20
1800 10, 15, 20
2000 10, 15, 20
2000 10, 15, 20
5
5
5
5, 10
5, 10
10, 15
10, 15
10, 15
1/31/2017