IO-123090-GFW-020113
- 3 -
©2013 AirMark
secondary to keep droplets out but allow trapped
condensate into secondary fittings.
CAUTION
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. Airmark will
NOT
be
responsible for any damages resulting from failure
to follow these instructions.
2" MINIMUM
3" MINIMU
FLEXIBLE
TUBING-HOSE
OR PIPE
A POSITIVE
LIQUID SEAL IS
REQUIRED
DRAIN
CONNECTION
Fig.1. Typical drain line trap set up
Ductwork
Duct systems should be installed in accordance
with standards for air-conditioning systems,
National Fire Protection Association Pamphlet No.
90A or 90B. They should be sized in accordance
with National Environmental System Contractors
Association Manual K, or 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 can, if poorly installed, amplify the
slightest vibration to the annoyance level.
All main supply and return air drops should be
properly sized as determined by the designer of
the duct system and should not necessarily be the
size of the duct flange openings of the unit.
These models have a bottom or front return.
Discard the drain access panel in the bottom of the
unit if this is a bottom return application. In case of
a front return application, the front access panel
should be removed and discarded. If an accessory
grill as shown in Fig 2. is being used; the front
access panel should be removed and discarded.
A filter rack is provided for
"
20
"
20
"
1
nominal
size filter. Inspect and clean or replace fliter every
month. A blocked filter can reduce air flow to the
coil and hinder the performance of the system.
It is recommended that wherever supply and return
air sheet metal ducts 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.
Fig.2. GFW air handler grill and drain connections
Installation
CAUTION
Ensure that the unit is adequately
sized. The tonnage of the outdoor unit should
never exceed the tonnage of this unit.
WARNING
The coil was manufactured with a
dry nitrogen pre-charge. Release the pressure
through the Schrader valve test port prior to
installation. If holding pressure is not present,
return coil to distributor for exchange.
Clean coil fins with degreasing agent or mild
detergent and rinse fins clean prior to installation.
All connection joints should be burr-free and clean.
Not removing burr and cleaning may increase the
chance of a leak. It is recommended to use a pipe
cutter to remove the spun closed end of the
suction line.
