10
Drain Connection
and Location
NOTICE
Figure 11
Indoor Return Air Grille Installation
Return Air Grille Options
Figure 12
Option 2
Field Supplied
Return Air Grille
Option 1
VPRG4 Return Air Grille
with Access Panel
There are two Indoor Return Air Grille options as shown in
Figure 12. Choose the option that best suits your needs.
Use the installation instructions provided with accessories
for installation details.
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.
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 openings high or low on the
door for optimal sound attenua-
tion.
It is recommended to install the
door with the hinge on the right
side and the return air openings
high on the door.
Must have a minimum of 250
square inches of free area.
There are the Friedrich recommended return air
grille/filter/access panel arrangements. Consult
Friedrich on other arrangements. Improper return air
arrangements will cause performance problems.
Return air arrangements are shown from the front,
but can also be installed from the right or left side of
the unit.
NOTES:
1)
The unit basepan has three (3) provisions (left, right,
and rear) for connecting an external condensate drain.
2) The supplied drain kit must be connected to one of the
three (left, right, or rear) ¾” FPT connections on the
unit basepan. Use of rear fitting without connection to
DWV system (drain, waste, vent) may result in
staining of the outside wall.
3)
Insert the provided ¾” nipple into the determined
connection using field supplied teflon tape or pipe joint
compound.
4)
With the threaded end of the supplied ¾” union,
connect to the nipple with teflon tape or pipe joint
compound.
5)
Hand-tighten all fittings to prevent damage to unit or
fittings.
6)
A field supplied drain system must now be installed to
the slip end of the union. A trap is recommended and
drain connections should be connected to building
DWV system.
7)
Pitch the drain line on a ¼” downward slope for every
foot (1’) of lateral horizontal run to the DWV.
8)
The remaining two connections must be plugged using
the two ¾” pipe plugs (provided) and field supplied
teflon tape or pipe join compound. Hand-tighten to
prevent damage to unit or fittings.
9)
Do not thread metal or copper pipe fittings directly into
unit.
10) Check system for leaks.
11) Failure to follow these procedures may result in
serious property damage.
12) A field supplied secondary condensate pan may be
required. Check with local codes.
Ductwork
The supply duct system should be designed via a recognized
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 .30" water column taking into conside-
ration 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 configuration
to perform properly.
