Friedrich 000 BTU/h User manual

920-159-07 (1-11)
NOTE: This manual only applies to 24,000 BT/u models.
For 9,000-18,000 BT/u models refer to manual 920-075-12.
Installation and Operation Manual
Single Package Vertical Air Conditioning System
24,000 BTU/h
VERT-I-PAK A-Series
®

Table of Contents
.................................... 1
.................................... 1
General Instructions ....................................................................................................................
Warnings .....................................................................................................................................
Your Safety and the Safety of Others............. ..............................................................................
General Information
.................................... 1
Installation Recommendations .................................................................................................................................... 4
General Specifications
Model Number Identification Guide ...............................................................................................
Electrical Data.................................................................................................................
Chassis Specifications ..................................................................................................................
................................... 2
Electrical Requirements................................................................................................................................................... 3
Electrical Rating Tables....................................................................................................................................................3
.................................. 2
.................................................2
Installation
Utility Closet Dimensions................................................................................................................................................. 5
Wall Plenum & Architectural Louver Installation .............................................................................................................. 6
Drain Pan Installation .................................................................................................................................................... 10
Condensate Disposal System ....................................................................................................................................... 13
Indoor Return Air Grille Installation................................................................................................................................ 13
Ductwork ....................................................................................................................................................................... 13
Chassis Installation ....................................................................................................................................................... 14
Chassis Final Connection
Final Installation checklist.............................................................................................................................................. 17
.............................................. 17
........................................ 17
...................................... 17
..................................... 17
Chassis Operation
Fresh Air Door .................................................................................................................
Low Ambient Compressor Lock Out ......................................................................................
Room Freeze Protection .........................................................................................................
Emergency Heat Operation.......................................................................................................
Service
Servicing/Chassis Quick Changeouts ........................................................................................................................... 18
Routine Maintenance ............................................................................................................
Electronic Control Error Code Diagnostics and Test Mode .......................................................................................... 18
........................................ 18
Error Codes .................................................................................................................................................................. 19
Remote Thermostat Operation
Remote Thermostat....................................................................................................................................................... 15
Thermostat Connections .......................................................................................................
...................................... 15
Desk Control Terminals ...........................................................................................................
........................................ 15
Auxiliary Fan Control ..........................................................................................................
Electrical and Friedrich Thermostat Wiring Diagrams ..................................................................................................
........................................... 15
16
Accessories....................................................................................................................................................................
............................................... 21
Warranty ........................................................................................................................
20

1
Thank you for your decision to purchase the Friedrich Vert-I-Pak Air Conditioner (VPAK). Your new Friedrich has been carefully
engineered and manufactured to give you many years of dependable, efficient operation, maintaining a comfortable
temperature and humidity level. Many extra features have been built into your unit to assure quiet operation, the greatest
circulation of cool, dry air, and the most economic operation.
This Installation and Operation Manual has been designed to ensure maximum satisfaction in the performance of your unit.
For years of trouble-free service, please follow the installation instructions closely. We cannot overemphasize the importance
of proper installation. We have added new information to the basic instructions to help you achieve success.
Congratulations!
General Instructions
Here are some suggestions to help you use your
new Friedrich most efficiently:
WARNING
Please read this manual thoroughly prior to equipment
installation or operation.
It is the installer’s responsibility to properly apply and
install the equipment. Installation must be in
conformance with the NFPA 70-2008 National Electric
Code or current edition, International Mechanic Code
2009 or current edition and any other applicable local
or national codes.
Failure to do so can result in property damage,
personal injury or death.
WARNING
Refrigeration system under high pressure.
Do not puncture, heat, expose to flame or incinerate.
Only certified refrigeration technicians should service this
equipment.
R410A systems operate at higher pressures than R22
equipment. Appropriate safe service and handling
practices must be used.
Only use gauge sets designed for use with R410A. Do
not use standard R22 gauge sets.
Failure to do so can result in property damage, personal
injury or death.
Your safety and the safety of others are
very important.
CAUTION
NOTICE
WARNING
This is a safety Alert symbol.
This symbol alerts you to potential
hazards that can kill or hurt you and
others.
All safety messages will follow the
safety alert symbol with the word
“WARNING” or “CAUTION”.
These words mean:
Indicates a hazard which, if not followed, can result in
severe personal injury or death and damage to product
or other property.
Indicates a hazard which, if not avoided, can result in
personal injury and damage to product or other property.
All safety messages will tell you what the potential
hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not
followed.
Indicates property damage can occur if instructions are
not followed.
We have provided many important safety messages
in this manual and on your appliance. Always read
and obey all safety messages.
1. Carefully read and follow the installation instructions.
2. Clean the filter frequently (See Routine Maintenance, page
18).
3. Do not block the air flow to and from the unit.
4. A dirty filter or improperly set controls can affect the cooling
ability and overall performance of the unit.
5. If cooling is weak and you have verified that the filter is
clean and the controls are properly set, the unit may need
service, and you should call your Friedrich service provider
to Check the unit.
6. Keep blinds, shades and drapes closed on the sunny side
of the room being cooled for optimum performance.
7. Proper insulation helps your unit maintain the desired inside
temperature.

2
Vert-I-Pak®
R-410A
23 1/8”
23 1/8”
47 1/4”
Vert-I-Pak®
ELECTRIC HEATER SIZE
25 = 2.5 KW
34 = 3.4 KW
50 = 5.0 KW
75 = 7.5 KW
100 = 10.0 KW
LTR43K
24
AEVREBMUNLEDOM
ENGINEERING CODE
OPTIONS
VOLTAGE
NOMINAL CAPACITY
DESIGN SERIES
SERIES
* Single circuit from main box. Based on copper wire 100' or less, single insulated conductor at 60 º C.
See chart, page 14
NOTE:
.4” water
Heater Watts 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180 2500/2050 3400/2780 5000/4090 7500/6135 10000/8180
Voltage
Heating BTU/h 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918 8500/7000 11600/9500 17000/13900 25598/20939 34130/27918
Heating Current (Amps) 10.9/9.9 14.8/13.4 21.7/19.7 32.6/29.5 43.5/39.3 10.9/9.9 14.8/13.4 21.7/19.7 32.6/29.5 43.5/39.3
Minimum Circuit Ampacity 17.2/15.9 22.1/20.3 30.7/28.1 44.3/40.3 57.9/52.7 17.2/15.9 22.1/20.3 30.7/28.1 44.3/40.3 57.9/52.7
Branch Circuit Fuse (Amps) 25 25 30 45 60 25 25 30 45 60
LRA - Compressor (Amps) 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8 34.8
Cooling Current (Amps) 10.0/10.4 10.0/10.4 10.0/10.4 10.0/10.4 10.0/10.4 10.6/10.9 10.6/10.9 10.6/10.9 10.6/10.9 10.6/10.9
Basic heater Size 2.5 Kw 3.4 Kw 5.0 Kw 7.5 Kw 10.0 Kw 2.5 Kw 3.4 Kw 5.0 Kw 7.5 Kw 10.0 Kw
Power Connection
Recommended Branch
Circuit Wire Sizes* AWG -
American Wire Gauge
10 10 10 6 4 10 10 10 6 4
HARD WIRED
HARD WIRED
VEA24K
VHA24K
230/208
230/208
Electrical Data

3
Electrical Data
Turn OFF electric power before service or
installation.
Unit must be properly grounded.
Unit must have correct fuse or circuit breaker
protection.
Unit’s supply circuit must have the correct
wire conductor size.
All electrical connections and wiring must be
installed by a qualified electrician and
conform to the National Electrical Code and all
local codes which have jurisdiction.
Failure to do so can result in property
damage, personal injury and /or death.
Electrical Requirements
Wire Size
Sample Nameplate
120524
COOLING EQUIPMENT
FOLLOWING ITEMS
OUTDOOR GRILLE
INDOOR GRILLE
SAMPLE
Electrical Rating Tables
Use ONLY wire size recommended for
single outlet branch circuit.
Use ONLY type and size fuse or HACR
circuit breaker indicated on unit’s rating
plate (See sample below). Proper over
current protection to the units is the respon-
sibility of the owner.
Unit MUST be grounded from branch circuit
to unit, or through separate ground wire
provided on permanently connected units.
Be sure that branch circuit or general
purpose outlet is grounded.
Use recommended wire size given in tables
and install a single branch circuit. All wiring
must comply with local and national codes.
NOTE: Use copper conductors only.
NOTE: All field wiring must comply with NEC and local
codes. It is the responsibility of the installer to insure that
the electrical codes are met.
NOTE: Use copper conductors ONLY. Wire sizes are per
NEC. Check local codes for overseas applications.
AWG --- American Wire Gauge
* Single circuit from main box.
** Based on 100’ or less of copper, single insulated con-
ductor at 60° C
Electrical shock hazard.
WARNING
Nameplate Maximum Circuit
Breaker Size AWG Wire Size
25A 10
30A 10
45A 6
60A 4
Recommended branch circuit wire sizes

4
For proper unit performance and maximum operating liferefer to the minimum installation clearances below.
Figure 2
Figure 1
12"
24"60"
KAPVKAPVKAPV
POLE
FENCE
MAJOR OBSTRUCTION
BUILDING
OUTDOOR
CONDENSING
UNIT
72"
24"
SHRUB
A
B
60"60"
60"
60"
LARGER RECESS OK. IF A> 5xB
12"
6"
60"
60"
60"
6"
60"
60"
6"
60" 60"
SMALL RECESS OK
VERT-I-PAK®units must be installed on an outside wall. Confined spaces and/or covered areas should be
avoided. Units should be installed no closer than 12" apart when two units are side by side. If three or more
units are to operate next to one another allow a minimum of 60" between units or pairs of units. Also, a vertical
clearance of 60" should be maintained between units. Units installed on the bottom floor should be mounted at
least 6" off of the ground.
Any time obstructions are present use the
following guidelines for proper spacing
from the VERT-I-PAK louver:
For minor obstructions such as lamp
poles or small shrubbery a clearance
of 24” from the outdoor louver should
be maintained.
For major obstructions such as a solid
fence, wall or other heat rejecting
device like a condensing unit, a
minimum distance of 72” should be
kept.
•
•
®
The above suggestions are for reference only and do not represent all posible installations. Please contact Friedrich for informa-
tion regarding affects of other installation arrangements.
By following these simple recommendations you can be confident that your Friedrich Vert-I-Pak will provide years of worry-free
operation.

5
Installation
Utility Closet Dimensions
electrical
entrance
control box
Figure 4
Top View
Recommended utility closet dimensions and a typical indoor installation are illustrated in Figure 3. Three inches minimum clearance
on three sides of the unit must be allowed for return airflow, installation access and service access. See Figures 3 & 4 for clearances
and reference dimensions.
NOTICE
Drain pan must be installed in closet prior to chassis
insertion into plenum. See Page 10 for drain pan insta-
llation details. Failure to do so can result in property
damage.
Figure 3
Typical Utility Closet Chassis Shown in Closet, on Optional Platform
Exterior Wall
Flexible Ductwork
Rigid Ductwork
VPAWP1-8/1-14Wall Plenum
Plenum
VPDP1 drain pan beneath
unit is required on all
VEA/VHA24 units.Drain
pan must be installed prior
to chassis installation
Chassis is
shipped with
vibration
isolators
installed
3" Clearance on all
three sides minimum for
service and installation
Optional Platform
Field-supplied
Filter (25" x 20")
58"
29"
Recommended field
installed drain pan
VPRG4 Access Panel &
Return Air Filter Grille
Power
Disconnect
Vert-I-Pak Chassis 2-ton dimensions:
23 1/8" wide x 23 1/8" deep x 47 1/4" high.
See Figure 16, page 14 for proper chasis
installation.

6
Wall Plenum and Architectural Louver Installation
Install the wall plenum components in accordance with the installation instructions provided.
Flashing
Caulk
1" –3" Screws to attach
the plenum assembly
to the wall studs
Header materials /
wall studs
Shim
There are two parts to a Wall Plenum:
A) 1-Outside Assembly (Part A)
B) 1-Inside Assembly (Part B)
Figure 6
Field Supplied Parts:
Figure 5
Included Parts
PART A CORRECT ORIENTATION:
!LOUVER ATTACHMENT
FLANGES TOWARD THE BUILD-
ING OUTSIDE, 45°
DRIP LEDGE AT THE BOTTOM.
PART B CORRECT ORIENTATION:
!LARGE OPENING TO BOTTOM
3/4" FLANGE TOWARD THE INSIDE
OF THE BUILDING.
45° Drip
Ledge
Part B
Inside
Plenum
Part A Out-
side Plenum
Caulk, Attachment screws and Flashing
are field supplied. Silicone caulk is
recommended.
VPAWP1-8 adjusts for walls 5.5 - 8.0" thick.
VPAWP1-14 adjusts for walls 8 - 14.0" thick.
Both installations are similar.
CAULK
NOTE: IMPORTANT REMINDER FRIEDRICH WALL PLENUM IS NOT DESIGNED TO CARRY STRUCTURAL LOADS.
PROPER WALL HEADER CONSTRUCTION IS REQUIRED. THE PLENUM REQUIRES PROPER FLASHING, SHIM
AND CAULK FOR A WEATHER RESISTANT INSTALLATION.
YOUR WALL PLENUM WILL WORK ONLY IF INSTALLED CORRECTLY. TAKE NOTICE TO INSTALL IT IN THE
CORRECT ORIENTATION AS SHOWN IN THE ILLUSTRATIONS. ALWAYS FOLLOW LOCAL AND NATIONAL CODES
FOR PROPER INSTALLATION.

7
24000 BTU/h
24
5
/
8
"
30
7
/ 8 "
11/2"
Floor to top
of frame
Figure 7
Measure and frame out the outside wall plenum opening
Figure 8
Install Architectural Louver on the Outside Plenum
LOUVER
OUTSIDE PLENUM
PART A
NOTE: The VPAL2 Architectural
Louver is best installed onto the
Outside Plenum (Part A) prior to
Wall Plenum installation. Louver
installation is easier at this point,
and it will help keep the Wall
Plenum square during installa-
tion.
IMPORTANT: THE WALL PLENUM IS NOT DESIGNED TO CARRY STRUCTURAL LOADS. A PROPER
HEADER OPENING MUST BE BUILT INTO THE ROUGH OPENING. THE PLENUM REQUIRES FLASHING,
SHIM AND CAULK FOR A WEATHER-RESISTANT INSTALLATION.
IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO PROPERLY INSTALL THE PLENUM AND MEET
BUILDING CODE REQUIREMENTS.
The plenum cut out dimensions are 24 5/8"
wide x 30 7/8" high. The bottom of the rough in
opening must be 1 1/2" from the surface the unit
will sit on.
If the installation will utilize an auxiliary drain
pan the drain pan must be a maximum of 1 ½”
tall. If the drain pan to be used is taller, the unit
must be raised within the auxiliary pan by the
difference in height of the drain pan and 1 ½”
Measure your outside wall as shown in the illus-
tration. Cut, frame, and square rough opening.
The Wall plenum has a 3/4" break all the way
around to cover the rough cut opening or
required shim.

After the rough cut opening is prepared, you are ready to assemble the two wall plenum parts. Before
caulking and permanent attachment, dry t the outside plenum into the rough opening and check for t
and level. Caulk (silicone recommended ) the parts well and insert them into the wall as shown.
A) Apply caulk and insert Outside Part A into the hole.
B) Apply caulk and insert Inside Part B into Part A. Be sure that Part A does not back out of the wall hole.
Figure 9
Plenum Installation
NOTE: Proper header and wall penetration must conform to all national and local building codes.
Proper Header
Proper
Flashing
Proper Flashing
Proper Caulking
Outside
Wall
Proper
Caulking
Architectural louver VPAL2
mounted on the outside
wall plenum (Part A)
Inside Wall Plenum (Part B)
8
Caulk all 8 ange
corners and unused
holes
Install anchor screws approxima-
tely four inches from the top and
bottom of the plenum. Do not
make penetration through the top
or bottom of the plenum

9
Figure 10
Adjust the Divider
NOTE:
Let the caulk cure completely before installing the
chassis. This completes the plenum installation.
Adjustment
Loosen the two screws located on the top side of the divider.
Slide the top part of the divider toward the outside until the
sealing strip makes contact with the outdoor louver. Tighten
the divider screws to complete the adjustment.
Figure 11
Wall Plenum Preparations
When completed, the wall plenum installation for the 24000 Btu/h unit should look like Figure B. Figure
B is shown with the VPDP1 drain pan installed. The drain pan is required for all 24000 units.
IMPORTANT:
This step must be performed to ensure that the chassis installs and seals properly in
the wall plenum.
From the inside of the closet locate the top portion of the factory installed weatherseal gasket, See
Figure A. Cut the gasket in the upper left and right hand corners of the plenum. Carefully remove the
entire top piece of gasket.
Figure A Figure B
Cut here

10
STEP 1: CUT OPENING IN
GASKET
STEP 2: SEAL AND SET
PAN
A
DETAIL A
8.00
B
2.00
DETAIL B
Sealant
Drain Pan Installation
Remove an 8" portion of the weather seal
gasket from the bottom left surface of the
plenum.
To remove: Cut the gasket in the lower left
corner of the plenum. Then make a
second cut 8" from the left corner. The
gasket should peel away from the plenum
leaving a clean mounting surface (See
detail A).
NOTE: THE ACCESSORY DRAIN PAN (VPDP1) MUST BE INSTALLED BEFORE INSTALLING THE UNIT.
1. The accessory drain pan has two (2) provisions (left & right) for connecting an external condensate drain.
2. A field supplied condensate drain system must be connected to one of the two ¾” FPT connections.
3. The remaining connection must be plugged using the ¾” pipe plug (provided) and field supplied Teflon tape or pipe joint
compound.
4. Failure to follow these procedures may result in serious property damage.
5. This is the primary drain pan. A field supplied secondary condensate pan is recommended and may be required.
Check with your local and national codes.
Prior to placing the drain pan into the
opening run a 1/4" bead of sealant the
entire width of the removed gasket.
The secondary overflow lip must
extend into the plenum to prevent
water leaks. The pan should be moun-
ted against the 3/4" flange of the
plenum (See detail B).
Figure 12

11
STEP 3: INSTALL DRAIN PAN
STEP 4: INSTALL DRAIN
PLUG
Attach the drain pan to the cl oset floor with
the appropriate field supplied hardware.
IMP OR TANT: To prevent water lea ks u se only
the factory supplied mounting holes. N EVER
make penetrations in the drain pan itself.
The drain pan comes with both left and
right-hand drain connections locations.
Determine which of the two
connections will be used to drain the
condensate. Then, with the factory
supplied drain plug, pl ug the unused
opening.
NOTE: Proper sealant must be applied
to the connection to prevent leaks.
Figure 13

12
IMPORTANT: The drain pan and line must be kept free from debris. Prior to installing the chassis ensure that there are
no blockages in the drain pan or line.
Option 1
Run condensate line
to right of unit
Option 3
Run condensate line
to left of unit
Option 2
Run condensate line
beneath unit platform
Option 4
Do not run
condensate line
back toward unit
STEP 5: INSTALL DRAIN LINE
Condensate line routing options are shown below. Choose the one that best suits your installation. Never run the
condensate line as shown in Option 4 below, as the drain line will come into contact with the factory-installed
isolators beneath the unit.
Figure 14

13
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.
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.
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.
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)
Moving parts hazard
WARNING
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.

2
3
/ 8
Chassis to
plenum gasket
Chassis Installation /Installed View
Figure 16
The V ert-I-Pak chassis must be inserted into the wall plenum so that the plenum divider gasket makes contact with the condenser
baffle in the unit.The chassis will fit approximately 2 3/8” into the wall plenum.
NOTE: Prior to installing the chassis, ensure that the drain pan and line are free from debris.
C. Place the chassis into the closet with the outdoor side
facing the wall plenum opening.
D. Slide the chassis into the wall plenum until the plenum
divider seal is established and the factory-installed
chassis to plenum gasket has sealed to the top flange of
the plenum. (See Figure 16)
Chassis Installation
NOTE: Prior to installing the chassis, ensure that the drain
pan and line are free from debris.
A. Ensure that the wall plenum is installed in accordance
with the VPAWP1-8/1-14 Installation Manual.
B. Ensure that the VPDP1 drain pan is installed correctly
(see Figure 16).Using the 3/4" plugs supplied with the
pan, plug the unused condensate drain hole. Connect a
drain to the condensate exit location. Be sure to use
teflon tape or approved pipe sealant on all drain
connections and plugs (see Figure 16).
ESP (") Low High
.00" 690 740
.10" 610 700
.20" 560 640
.30" 510 580
.40" 450 520
Model
VEA24/VHA24
Highlighted values indicate
rated performance point.
Excessive Weight Hazard
CAUTION
Use two or more people when
installing your air conditioner.
Failure to do so can result in back
or other injury.
Cut/Sever Hazard
CAUTION
Some edges may be sharp, use
gloves or other hand protection
when handling unit.
Failure to do so can result in minor
to moderate personal injury.
For single speed thermos-
tats connect to the GL
terminal for Low speed or
GH terminal for High
speed. Two speed control
thermostats will use both.
14

15
Remote Thermostat and Low Voltage Control Connections
Remote Thermostat
To connect the wall-mounted thermostat:
1) Pull the disconnect switch.
2) Unscrew and remove the control box panel.
3) After selecting which side you want to run your thermostat
wire through, run the wires through the side hole in the box
to reach the connection terminal for the wiring.
4) Make the wire connections, appropriately matching the
wires as shown in the wiring diagram.
5) Once each wire is matched and connected, the unit is now
ready for operation.
6) Reattach the control box cover.
Desk Control Terminals
Maximum Wire Length for Desk Control Switch
Wire Size Maximum Length
#24 400 ft.
#22 600 ft.
#20 900 ft.
#18 1500 ft.
#16 2000 ft.
Thermostat Connections
C = Common Ground
W = Call for Heating
Y = Call for Cooling
R = 24V Power from Unit
GL = Call for Fan (Low Speed)
GH = Call for Fan (High Speed)
B = Reversing Valve Energized in heating mode
All Friedrich Vert-I-Pak units are factory configured to be con-
trolled by using a single stage heat/cool remote wall mounted
thermostat.
The thermostat may be auto or manual changeover as long as the
control configuration matches that of the Vert-I-Pak unit.
The Friedrich VERT-I-PAK has built-in provisions for connection to
an external switch to control power to the unit.
The switch can be a central desk control system or even a
normally open door switch.
For desk control operation, connect one side of the switch to the
D1 terminal and the other to the D2 terminal (See figure 17).
Whenever the switch closes, the unit operation will stop.
NOTE: The desk control system and switches must be field
supplied.
Other manufacturer’s units and even older Friedrich models
may have different control wiring connections. Questions
concerning proper connections to the unit should be directed to
the factory.
Improper connection of the thermostat
control wiring and/or tampering with the
unit's internal wiring can void the
equipment warranty and can result in
property damage, personal injury and/or
death.
Electrical shock hazard.
WARNING
Control Board
Figure 17

RT6
THERMOSTAT
(FRONT)
16
RT5 Electrical & Thermostat Wiring Diagrams
Figure 18
NOTE: THE DIAGRAM ABOVE, ILLUSTRATES THE TYPICAL THERMOSTAT WIRING FOR TWO SPEED
FAN OPERATION. SEE THE UNIT CONTROL PANEL FOR THE ACTUAL UNIT WIRING DIAGRAM
AND SCHEMATIC.
WHITE
WHITE
WHITE
BLUE
RED
WHITE
RED
WHITE
BLACK
GREEN
BROWN
BROWN
BROWN
C
GREEN
FAN
HERM
BLACK
L1 L2
C
ELECTRONIC CONTROL
HERM
" F "
R
S
C
FAN
TERMINAL DETAIL
BLACK
BLUE
BLUE
BLACK
BLACK
BLUE
HEATER
2.5 KW & 3.5 KW
5.0 KW
BLACK (TO L1)
BLACK
RED
PRESSURE
SWITCH
COMPRESSOR
CONTACTOR
QUICK DISCONNECT COIL SOLENOID
TO MOTOR
MOUNT FAN MOTOR
CAPACITOR
BLOWER
MOTOR
TO MOTOR
MOUNT
WHITE 520 (TO L2)
CAPACITOR
COMPRESSOR
GASKET
TEMINAL COVER
WASHER
NUT
HARNESS COMPRESSOR
F1
GL
GH
F2
RC
W
RH
C
D1 D2
R
BC
GH
GL O Y
B
YW
W Call for Heating
B Reversing valve Energized in heating mode
GL Call for Low Fan
GH Call for High Fan
RT5-Two Speeds Fan T-STAT-Field Provided
Field Wiring
R 24VAC Power From Unit Y Call for Cooling
THERMOSTAT CONNECTIONS
00
PART NO. REV
LEGEND
BROWN
RED
INDOOR COIL SENSOR
OUTDOOR COIL SENSOR
SERVICE DISPLAY
AMBIENT AIR SENSOR
L2 or ACN
L1
VOLTAGE SELECTION SWITCH
SET VOLTAGE TO 220V
RV RELAY
FAN 4 RELAY
FAN 3 RELAY
FAN 2 RELAY
FAN 1
RELAY
HEAT RELAY
HEAT RELAY
COMP RELAY
VOLTAGE SWITCH
WIRING DIAGRAM HEAT PUMP EH
7.5KW, 10.0KW
VHA 24K

17
Chassis Final Connections
With the chassis in place, you are now ready to begin chassis
connections:
A. Move the thermostat switches to "OFF" and "AUTO". This
will keep the thermostat from cycling the chassis until final
connections are complete.
B. Connect the duct work onto the 10" collar. Plastic wire ties
(field supplied) are suggested to secure the duct work in
place. Use 2 wire ties, one for each inner and outer flex
duct sleeve.
C. Review the Final Installation Checklist before replacing
the power quick disconnect, reconnecting power to the
chassis, or operating the chassis.
Chassis Operation
Fresh Air Door
Low Ambient Compressor Cut Out
Room Freeze Protection
Electrical shock hazard.
WARNING
Pull out electrical disconnect on front of
the chassis and turn off all power to the
unit before servicing.
Failure to do so can result in property
damage, personal injury and/or death.
Final Inspection & Start-up Checklist
Inspect and ensure that all components and
accessories have been installed properly and that they
have not been damaged during the installation
process.
Ensure that all installation instructions concerning
clearances around the unit have been adhered to.
Check to ensure that the unit air filter, indoor coil, and
outdoor coil are free from any obstructions.
Ensure that the circuit breaker(s) or fuse(s) and supply
circuit wire size have been sized correctly.
Check the condensate water drain(s) to ensure that
they are adequate for the removal of condensate
water, and that they meet approval of the end user.
Ensure that the entire installation is in compliance with
all applicable national and local codes and ordinances
having jurisdiction.
Secure all access panels (i.e. front cover and/or control
box), apply power to the unit, then start the unit, and
check for proper operation in each mode. Instruct the
owner or operator regarding the unit’s operation, and
the recommended routine maintenance schedule.
NOTE: Maintaining a log for recording the dates of
maintenance and/or service is recommended, and should
be suggested to the owner or operator of the equipment.
Present the owner or operator of the equipment with the
Installation & Operation Manual, all accessory installation
instructions, and the name, address and telephone number
of the Authorized Friedrich Warranty Service Company in
the area for future reference if necessary.
The Fresh Air Door is an “intake” system. The fresh air door
is opened via a slide on the front of the chassis located just
above the indoor coil. Move the slide left to open and right
to close the fresh air door. The system is capable of up to
80 CFM of fresh air @
~.3” H20 Internal static pressure.
Each chassis is equipped with low ambient protection in the
form of a thermistor, wich will prevent compressor
operation at low suction temperature.
This feature will monitor the indoor room conditions and in
the event that the room falls below 40º F the unit will cycle
on high fan with the electric heater. This occurs regardless
of mode.

18
Service & Warranty
Servicing / Chassis Quick Changeouts
.
Routine Maintenance
Performing Routine Maintenance
Replace Air Filter
With the proper maintenance and care, your system will
operate economically and dependably. Maintenance can be
accomplished easily by referring to the following directions.
However, before performing any maintenance, see above
stated WARNING.
Electrical shock hazard.
WARNING
Pull out electrical disconnect on front of
the chassis and turn off all power to unit
before servicing.
Failure to do so can result in property
damage, personal injury and/or death.
Cut/Sever Hazard
CAUTION
Some edges may be sharp, use gloves
or other hand protection when handling
unit.
Failure to do so can result in minor to
moderate personal injury.
Lint and dirt
on the indoor-air coil can damage your unit.
To Remove the Chassis from the Closet:
A. Switch the wall Thermostat off.
B. Pull the Power Disconnect located in the front of the chassis.
C. Disconnect the power coming into the unit from the main
breaker panel or the closet mounted disconnect.
D. Disconnect the electrical connection.
E. Disconnect the duct work.
F. Slide the chassis out of the wall plenum.
G. Lift the chassis out of the utility closet.
Inspect and Clean Indoor-air Coil
Inspect Outdoor-Air (OA) Intake and Exhaust
Inspect and Clean Condensate Drain
Warranty
supply depots.
and could damage it.
All warranty service work must be done by an authorized
servicer. See Product Warranty, and consult your dealer
or contractor for details.
NOTE: Do not operate your system without a filter in
place or block the front of the unit return air opening.
Electronic Control Error Code
Diagnostic and Test Mode
Error Code Diagnostics
The VPAK electronic control continuously monitors the
Vert-I-Pak unit operation and will store error codes if certain
conditions are witnessed. In some cases the unit may
takeaction and shut the unit off until conditions are corrected.
To access the error code menu press the ' ENTER ' button
If error codes are present they will be displayed. If multiple codes
exist you can toggle between error codes using the ' SCROLL '
button. To clear all codes press the 'ENTER' and 'SCROLL'
for three seconds while in the error code mode.
To exit without losing codes press the
'LOW FAN'
button.
buttons