Condensate Disposal System; Indoor Return Air Grille Installation; Ductwork; Indoor Air Flow Data - Friedrich VERT-I-PAK A Serie Manuel D'installation Et D'utilisation

Condensate Disposal System

The Condensate Disposal System increases energy
efficiency utilizing a factory installed fan that slings the cold
condensate onto the hot outdoor coil.
When high outdoor humidity prevents the slinger from
disposing of all the condensate, the excess condensate
overflow into the condensate drain pan and out of the 3/4"
internal drain connection.
NOTE: If the Condensate Disposal System fails to remove
all of the condensate from unit, any excess condensate will
overflow from a spillway in the rear of the unit directly into
the wall plenum, and drain outside the building, This is your
indication that the chassis or drain requires servicing.
WARNING
Moving parts hazard
Turn off electric power before servicing
this component.
Fan can start automatically.
Failure to do so can result in property
damage, personal Injury and/or death.

Indoor Return Air Grille Installation

There are two indoor Return Air Grille operations as shown
in Figure 15. Choose the option that best suits your needs.
Use the installation instructions provided with accessories
for installation details.
Figure 15
Return Air Grille Options
NOTE: All Vert-I-Pak chassis are shipped with a 20" x
14" filter installed. If an accessory filter holder is to be
used. You MUST remove the factory shipped filter from
the chassis. Do NOT use two filters.
Option 1
VPRG4 Return Air Grille
with Access Panel
A field-supplied (25" x 20") filter is
mounted inside the hinged access
door.
Kit contains hinge bracket for
mounting the door with the return
air opening high or low on the door
for optimal sound attenuation.
For 24,000 /Btus models, it is
recommended to install the hinge
on the left side with the return air
openings low on the door.
Option 2
Field Supplied
Return Grille
Must have a minimum of 250
square inches of free area.
NOTES:
These are the Friedrich recommended return air
grille filter/access panel arrangements. Consult
Friedrich Air Conditioning on other arrangements.
Improper return air arrangements will cause perfor-
mance problems.
Return air arrangements are shown from the front,
but can also be installed from the right or left side of
the unit.

Ductwork

The supply duct system should be designed via a recogni-
zed method such as the equal friction method, or velocity
reduction method, using the appropriate duct calculator(s)
for the type(s) of duct (i.e. metal duct, duct board, or flex
duct) being used in the system. The duct system should be
designed for a maximum friction rate of .40" water column
taking into consideration all fittings, registers and/or
diffusers. DO NOT operate unit without a supply duct
attached.
The return air to Vert-I-Pak "A" series units MUST NOT be
ducted, and all units MUST have a free return air configura-
tion to perform properly.

Indoor Air Flow Data

Indoor air flow may be determined by measuring the exter-
nal static pressure (ESP) of the duct system using an
inclined manometer or magnehelic gauge, then consulting
chart "A" to determine actual air flow. Rated air flow for
each unit is obtained at .10" water column when operating
with a clean filter and a dry coil (i.e. heating) on the indica-
ted speed at 230 Volts. Use the air flow correction multi-
pliers contained in chart "B" to determine accurate air flow
under the listed conditions. Under no circumstances should
the Vert-I-Pak equipment be operated at an external static
pressure in excess of .40" water column. Operation of the
Vert-I-Pak under these conditions will result in inadequate
air flow leading to poor performance and/or premature
component failure.
For LOW speed operation, connect the fan output terminal
from the thermostat to the GL terminal of the electronic
control. For HIGH speed operation, connect the fan output
terminal from the thermostat to the GH terminal of the
electronic control. For thermostats with two-speed fan
capabilities, connect the LOW speed output to the GL
terminal, and the HIGH speed output to the GH terminal.
(See Figure 18, page 16)
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