8
920-075-09
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
Indoor Return Air Grille Installation
There are two Indoor Return Air Grille options as shown in Figure 9.
Choose the option that best suits your needs. Use the installation
instructions provided with accessories for installation details.
Return Air Grille Options
Figure 9
Option 2
Field Supplied
Return Air Grille
Must have a minumum of 250
square inches of free area.
Notes:
A. These are the Friedrich recommended return air grille/
filter/access panel arrangements. Consult the factory on
other arrangements. Improper return air arrangements
will cause performance problems.
B. Return air arrangements are shown from the front, but
can also be installed from the right or left side of the unit.
Drain Pan Installation
Condensate Disposal System
The VPDP1 drain pan features two ¾ female PVC fittings to at
-
tach a drain connection to on the left or right side of the drain pan.
Condensate piping can be routed to the left, right or beneath the
unit platform. See drain pan installation manual for more information.
Part 1:
The system’s first stage increases energy efficiency
utilizing a factory installed fan that slings the cold
condensate onto the hot outdoor coil.
Part 2:
When high outdoor humidity prevents the slinger
from disposing of all the condensate, the excess
condensate overflows into the condensate drain pan
and out of the ¾" internal drain connections.
Part 3:
If Parts 1 & 2 fail for any reason, excess condensate
overflows from a spillway directly into the wall plenum
to the outside of the building.
IF THIS OCCURS,
THIS IS A WARNING THAT THE CHASSIS OR
DRAIN NEEDS SERVICING.
Option 1
VPRG4 Return Air Grille
with Access Panel
A field-supplied (25" x 20")
filter is mounted inside the
hinged access door.
CAUTION
The unit basepan has three (3) provisions (left, right,
and rear) for connecting an external condensate drain.
A field supplied condensate drain system
must
be
connected to one of the three (left, right, or rear) 3/4"
FPT connections on the unit basepan. Use of rear
fitting may result in staining of the outside wall.
The remaining two connections
must
be plugged
using the two 3/4" pipe plugs (provided) and field
supplied teflon tape or pipe joint compound.
The addition of a secondary drain pan may be
required. Follow all applicable codes.
Failure to follow these procedures may result in
serious property damage.
A field supplied secondary condensate pan may be
applied. Check with local codes.
Drain Connection
and Location
8
7
/
8
"
7
1
/
8
3"
17 x 2
1
/
8
