2
IO-123163 Effective 01-14-2016
4. Installation Preparation
Read all the instructions in this guideline carefully while paying
special attention to the WARNING and CAUTION alerts. If any of
the instructions are unclear; clarify with certified technicians. Gather
all the tools needed for successful installation of the unit prior to
beginning the installation.
If the unit is to be installed in garages, warehouses or other areas
where they may be subjected to physical damage, adequate
protective barriers must be installed. Unit shall be installed 18” away
from source of ignition.
If the unit is located in high humidity areas like attics or unconditioned
garages; the air handler casing might experience nuisance sweating.
In such installation scenarios, wrapping the casing with a 2” fiberglass
insulation with vapor barrier shall be used.
The drain lines must be installed with ¼” per foot pitch to provide free
drainage. A condensate trap MUST be installed on the primary drain
line to ensure proper drainage of the condensate. The trap must be
installed in the drain line below the bottom of the drain pan (Fig.
4D-1)
Since coil is upstream of the blower, all
drains MUST be trapped or sealed. Failure
to do so will result in condensate overflow
from the drain pan. Aspen will NOT be responsible for any
damages resulting from failure to follow these instructions.
CAUTION
!
Ductwork for air conditioning systems should be installed in
accordance with standards of the National Fire Protection Association
Pamphlet No. 90A or 90B, and also be sized in accordance with
National Environmental System Contractors Association Manual K,
whichever is applicable.
On any job, non-flammable flexible collars should be used for the
return air and discharge connections to prevent transmission of
vibration. Although these units have been specially designed for
quiet vibration-free operation, air ducts can act as soundboards, and
if poorly installed, amplify the slightest vibration to the annoyance
level.
All main supply and return air drops should be properly size as
determined by the designer of the duct system and should not
necessarily be the size of the duct flange openings of the unit. When
installing a central air return grille in or near the living space, it is
advisable to design the ductwork so that the grille is not in direct
line with the opening in the unit. The use of one or two elbows and
acoustical duct liner will also ensure quieter system operation.
It is recommended that wherever supply and return air sheet metal
duct pass through unconditioned areas, they be insulated to prevent
excessive heat loss during heating operation. When applied in
conjunction with summer air conditioning, sheet metal duct routed
through unconditioned areas should be insulated and have an
outside vapor barrier to prevent formation of condensation.
The drain pan has primary (white) and secondary (red) drain
connections. If a secondary drain line is required, it should be run
separately from the primary and should terminate in a highly visible
location. Condensate disposal through the secondary drain line
indicates that the primary drain line is plugged and needs cleaning. If
a secondary drain line will not be provided, plug the secondary drain.
Drain plugs are NOT to be reused without plumbers tape or putty.
The drain line connectors should be hand tightened to a torque of
approximately 35-40 lb (4-5 turns).
Fig 4A-1. Air Handler Dimensions
Fig 4D-1. Condensate Drain Trap
3. Inspection
ü
On receiving the product, visually inspect it for any major shipping
related damages. Shipping damages are the carrier’s responsibility.
Inspect the product labels to verify the model number and options
are in accordance with your order. Manufacturer will not accept
damage claims for incorrectly shipped product.
Drain lines from the auxiliary drain pan
should NOT be connected to the primary
drain line of the coil.
CAUTION
!
If the drain pan is constructed of nylon
or plastic, use Teflon tape to connect the
drain lines to the threads in the drain pan.
DO NOT USE SOLVENT-BASED PIPE DOPE. THIS WILL
REDUCE THE LIFE OF THE PAN.
CAUTION
!
The GFT series of horizontal ceiling mount air handlers are designed
for zero clearance installation on the sides and back.
4A.
Clearances
4B.
Installation Options
4C. Condensate Drain
4D. Ductwork
ENCLOSURE DIMENSIONS
UNIT MODEL
A”
B”
C”
GFT 18-24
51-3/4
36-7/8
40
GFT 30-36
66-1/2
48-7/8
55
