Daikin VHF Manual

Installation and Maintenance Manual IM 986-11
Group: WSHP
Part Number: 910258818
Date: December 2018
Vertical Stack Water Source Heat Pumps
Model VHF Cabinet
Model VHC Chassis (Standard Range)
Model VHW Chassis (Geothermal Range)
Unit Sizes 009 – 036 / R-410A Refrigerant
Model VHF Model VHC/VHW

Contents
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Model Nomenclature ..........................4
Receiving and Storage.........................6
Receiving and Storage ........................6
Handling ...................................7
General Information ..........................7
Disassembling Upper and Lower Cabinet Sections ..8
Dimensional Data .............................9
Model VHF & VHW – 18" × 18" Cabinet –
Size 009-012 ................................9
Model VHF & VHW – 18" × 20" Cabinet –
Size 015-018 ...............................10
Model VHF & VHW – 24" × 24" Cabinet –
Size 021-036 ...............................11
Pre-Installation Considerations ................12
Cabinet Congurations .......................13
Critical Dimensions ..........................15
Framing Locations and Dimensions .............15
Louvered Return Air Panel Door with Optional
Motorized Outdoor Air Damper .................16
Vertical Riser Stub-Outs Locations to
Unit Knockouts .............................17
Return Air Panel Door(s) Dimensions ............18
Installation..................................19
Risers and Cabinet ..........................19
Water System Quality ........................21
Supply & Return Piping .......................22
Cleaning and Flushing Water System ............22
Operating Limits ............................23
Antifreeze Correction Factors ..................23
Power Wiring From Building to Unit .............24
Typical Connections For Thermostats & Temperature
Sensors Applications.........................24
Unit Piping Connection .......................27
Shutoff/Balancing Valve ......................27
Motorized Valve & Auto Flow Regulator ..........27
Make Flexible Hose Connections to the Supply and
Return Valves From Riser Stub-Outs ............28
Important When Handling Chassis ..............28
Installing Unit Chassis........................28
Making Cabinet to Chassis Wiring Connections ....29
Installing the (Optional) Remote Control Node (RCN)
For Use With The Optional Wireless Thermostat ...29
Installation..................................31
Installing The Return Air Panel Door.............31
Installing The Optional Motorized Outdoor Air Damper
with Louver Panel Door Only ..................32
Installing The Discharge Air Diffuser .............35
Twin Units Installation ........................36
Controls....................................37
Jumper Conguration Settings .................39
MicroTech® III SmartSource Unit Controller .......40
MicroTech SmartSource Controller with LonWorks®
Communication Module ......................41
MicroTech SmartSource Controller with BACnet®
Communication Module ......................41
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Fan Performance for PSC Motor (Sizes 009 - 036) . 43
Fan Performance for Constant Torque EC Motor
(Sizes 009-012).............................44
Fan Performance for Constant CFM EC Motor
(Sizes 015 - 036)............................45
Performance For Constant Torque EC Motor
(Sizes 009 & 012) ...........................46
Typical Wiring Diagrams ......................47
Typical Wiring Diagrams ......................49
Start-Up ....................................53
Information for Initial Start-up ..................53
Check, Test & Start Procedure .................53
Motorized Isolation Valve & Relay...............53
The in and outs of R-410A ....................54
Lubrication.................................54
Charging ..................................54
General Maintenance .........................54
Troubleshooting .............................55
Typical Refrigeration Cycles ...................56
Water Source Heat Pump Equipment Check, Test and
Start Form .................................57
Unit Check / Equipment Data ..................58

Model noMenClature
Note: Text displayed in Bold-Italics designate standard offering.
Category Code Item Code Option Code Designation & Description (Bold-Italic = Standard)
Product Category 1 1 W = Water Source Heat Pump
Model Type 2 2, 3, 4 VHC = Vertical Stacked Heat Pump Chassis
VHF = Vertical Stacked Heat Pump Cabinet
VHW = Vertical Stacked Geothermal Chassis only
Design Series 3 5 3 = 3rd Design
4 = 4th Design (Sizes 015 only)
Unit Size 4 6, 7, 8 009 = 9,000 Btuh Nominal Cooling
012 = 12,000 Btuh Nominal Cooling
015 = 15,000 Btuh Nominal Cooling
018 = 18,000 Btuh Nominal Cooling
021 = 21,000 Btuh Nominal Cooling
024 = 24,000 Btuh Nominal Cooling
030 = 30,000 Btuh Nominal Cooling
036 = 36,000 Btuh Nominal Cooling
Controls 5 9 B = MicroTech III Unitary Controller - Standalone
C = Microtech III Unitary Controller w/LonWorks Comm Module
D = Microtech III Unitary Controller w/BACnet Comm Module
F = Microtech III Unitary Controller w/BACnet Comm Module - WSHP System
Voltage 6 10 A = 115/60/1
E = 208-230/60/1
J = 265-277/60/1
Secondary Drain Pan 7 11, 12 GL = Standard Galvanized
SS = Stainless Steel - IAQ Option
YY = None
Refrigerant 8 13 A = R410A
Motorized 2-way Isolation Valve 9 14 C = 2-Way Motorized 1/2" Iso-Valve, General Close-Off Pressure N.C.
(Normally Closed)
V = 2-Way Motorized 1/2" Iso-Valve, General Close-Off Pressure N.O.
(Normally Open)
H = 2-Way Motorized 1/2" Iso-Valve, High Close-Off Pressure N.C. (Normally Closed)
D = 2-Way Motorized 3/4" Iso-Valve, General Close-Off Pressure N.C. (Normally Closed)
K = 2-Way Motorized 3/4" Iso-Valve, General Close-Off Pressure N.O. (Normally Open)
J = 2-Way Motorized 3/4" Iso-Valve, High Close-Off Pressure N.C. (Normally Closed)
E = 3-Way Motorized 1/2" Iso-Valve, General Close-Off Pressure N.C. (Normally Closed)
G = 3-Way Motorized 1/2" Iso-Valve, High Close-Off Pressure N.C. (Normally Closed)
M = 3-Way Motorized 3/4" Iso-Valve, General Close-Off Pressure N.C. (Normally Closed)
P = 3-Way Motorized 3/4" Iso-Valve, High Close-Off Pressure N.C. (Normally Closed)
B = Auto-Reg-PT
Y = None
Chassis Construction Type 10 15 A = 1/2" Fiberglass Skin Faced
E = 3/8" Closed Cell Foam
Note: F = 1/2" Fiberglass - Foil Faced
A compressor sound blanket is not recommended Y = None
for units with a rotary compressor 16 M = Mass Plate & Comp Blanket (Unit Sizes 024-036 Only)
(Unit sizes 009-021) S = Mass Plate Only
Coaxial Heat Exchanger
Construction 11 18 C = Copper Inner Tube - Steel Outer Shell
S = Cupronickel Inner Tube - Steel Outer Shell
Discharge Air 13 20 B = Primary Supply - Back
F = Primary Supply - Front
L = Primary Supply - Left
R = Primary Supply - Right
T = Primary Supply - Top
Y = None
21 B = Secondary Supply - Back
F = Secondary Supply - Front
L = Secondary Supply - Left
R = Secondary Supply - Right
T = Secondary Supply - Top
Y = None
22 T = Tertiary - Top
Power Connection 14 23 F = Fused Disconnect with Wire Harness
N = Non-Fused Disconnect with Wire Harness
H = HACR Breaker
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Model noMenClature
Note: Text displayed in Bold-Italics designate standard offering.
Category Code Item Code Option Code Designation & Description (Bold-Italic = Standard)
Blower Motor 15 24 1 = Standard PSC
3 = EC Motor
25 2 = 2 Speed Fan - T'Stat Controlled
3 = 2 Speed Fan - Unit Toggle Switch
4 = 4 Position Fan Speed Selection Switch (Units with EC motor)
Power & Control Access 16 26 S = Side
T = Top
Flow Control 17 27 B = Auto Flow Regulator 1.5 GPM
C = Auto Flow Regulator 2.0 GPM
D = Auto Flow Regulator 2.5 GPM
E = Auto Flow Regulator 3.0 GPM
F = Auto Flow Regulator 3.5 GPM
G = Auto Flow Regulator 4.0 GPM
H = Auto Flow Regulator 4.5 GPM
I = Auto Flow Regulator 5.0 GPM
J = Auto Flow Regulator 5.5 GPM
K = Auto Flow Regulator 6.0 GPM
L = Auto Flow Regulator 7.0 GPM
M = Auto Flow Regulator 8.0 GPM
N = Auto Flow Regulator 9.0 GPM
O = Auto Flow Regulator 10.5 GPM
YY = None
28 S = Strainer
Filter Type 18 29 S = Standard 1"Fiberglass
Y = None
M = 1" Merv 8
Cabinet Height 19 30, 31, 32 080 = 80" Cabinet Height
088 = 88" Cabinet Height
092 = 92" Cabinet Height
096 = 96" Cabinet Height
Cabinet Insulation 20 33, 34 AY = Standard 1/2" Fiberglass
EY = 3/8" Closed Cell Foam (IAQ)
FY = 1/2" Foil Faced
YY = None
Riser Mounting 21 35 F = Factory Supplied Shipped with Cabinet - for Field Installation
J = Factory Supplied Shipped Separate from Cabinet - for Field Installation
Riser Location 22 36 L = Left Cabinet Piping
R = Right Cabinet Piping
B = Back Cabinet Piping
Heating Options 23 37 H = Hydronic Heat
Y = None
Heating Control Option 39 A = 3-Way 1/2" Motorized Valve
B = 3-Way 3/4" Motorized Valve
Y = None
Wireless T'Stat Option 24 40 N = Factory Installed Wireless RF Receiver with Non-Programmable Thermostat
P = Factory Installed Wireless RF Receiver with 7-Day Programmable Thermostat
Y = None
Packaging 30 50 1 = Multipack Chassis or Single Crated Cabinet
2 = Multipack Cabinets - Multiple Cabinets on one pallet group
Extended Warranty 31 51 Y = None
V = 1 Year Extended Compressor Only Parts Warranty
W = 1 Year Extended Refrigerant Circuit Parts Warranty
E = 1 Year Extended Complete Unit Parts Warranty
C = 4 Year Extended Compressor Only Parts Warranty
R = 4 Year Extended Refrigerant Circuit Parts Warranty
P = 4 Year Extended Complete Unit Parts Warranty
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reCeiving and storage
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Receiving and Storage
Upon receipt of the equipment, check the carton and pallets
for visible damage. Make a notation on the shipper’s delivery
ticket before signing. If there is any evidence of rough handling,
immediately open the cartons to check for concealed damage.
If any damage is found, notify the carrier within 48 hours to
establish your claim and request their inspection and a report.
The Warranty Claims Department should then be contacted.
4'
6'
Cabinet Stacking (1 unit per crate)
Do not stack over three crates high at any time during trans-
portation or storage.
Unit back
Pallet front
Risers
Risers are factory supplied with
cabinet for eld installation.
Unit front
Note: Packaging has been tested and certied in accordance with the
International Safe Transit Association (ISTA), test procedure 3B.
Chassis (4 per skid)
Do not stack over two skid high at any time during transporta-
tion or storage. For storing, each carton is marked with “up”
arrows.
Storage and Operating Environment
Temporary storage at the job site must be indoor, completely
sheltered from rain, snow, etc. Units should not be installed in
environments that fall below freezing or exceed 140°F ambient.
Table 1: Cabinet packaging overall dimensions
Unit Size Cabinet Size
18 x 18 18 x 20 24 x 24
009-012
With Risers121"W x 29"H x 91.50" to 124.50"L – –
Without Risers 21"W x 27"H x 91.50" to 107.50"L – –
015-018
With Risers1_ 21"W x 31"H x 91.50" to 124.50"L –
Without Risers _ 21"W x 29"H x 91.50" to 107.50"L –
021-036
With Risers1_ – 27"W x 35"H x 91.50" to 124.50"L
Without Risers _ – 27"W x 23"H x 91.50" to 107.50"L
Note: 1 Risers are factory supplied with cabinet for eld installation.

reCeiving and storage
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Handling
Carefully check items against the bills of lading to verify all
crates and cartons have been received.Cabinets and Chassis
normally ship four to a pallet.
Carefully inspect all units for shipping damage. Report
damage immediately to the carrier and le a claim.
Check the unit data plate to be sure the unit electrical agrees
with the power supply available (Figure 1).
DO NOT handle units by the riser piping. Riser clamps hold the
riser in position; they are not designed to support the cabinet
weight. The clamps are removed after the unit is installed.
Figure 1: Unit components & descriptions - received as
assembled cabinet with chassis shipped separate
1
1a
1b
1b
2
3
4
Unit
Data Plate
Stub-out
Seals
Chassis
Data Plate
Component Descriptions (Assembled Cabinet)
1. Cabinet assembly complete (without chassis)
1a. Pipe riser sets (return, supply and condensate)
1b. Inner front panel and lter bracket
2. Cooling and heating chassis (shipped separate)
3. Return air grille/panel (accessory)
4. Double-deection diffuser (accessory)
Unit cabinets are factory assembled and wired and have
individual thermostat control capability. They are installed by
stacking one unit on top of the other. While installing, prevent
dirt and other foreign matter from entering the risers and plug-
ging lines or valves.
General Information
Daikin Vertical Stack units are designed for use in multiple oor
apartments, ofce buildings, hotels, nursing homes and other
similar applications. They require a minimum amount of oor
space and are designed for multiple discharge arrangement.
Installation and maintenance must follow accepted industry
practices as described in the ASHRAE Handbook, the National
Electric Code, and other applicable standards. Install this
equipment in accordance with regulations of authorities having
jurisdiction and with all applicable codes.
CAUTION
Sharp metal edges are a hazard, use care when servicing
to avoid contact with them.
WARNING
The installer must determine and follow all applicable
codes and regulations. This equipment presents hazards
of electricity, rotating parts, sharp edges, heat and weight.
Failure to read and follow these instructions can result in
property damage, severe personal injury or death. This
equipment must be installed by experienced, trained
personnel only.
CAUTION
Installation and maintenance are to be performed by
qualied personnel who are familiar with local codes and
regulations, and experienced with this type of equipment.

Prior to installing
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Disassembling Upper and Lower Cabinet
Sections
The Vertical Stack unit cabinet ships completely assembled. If
required, it may be disassembled into two (2) sections (upper-
fan/discharge cabinet) and (lower chassis/return air cabinet) to
make it easier to handle. To disassemble, do the following.
1. Remove risers (if received attached).
2 Remove the three (bottom row) screws on the back of the
unit as shown in Figure 2.
Note: Retain all screws for later use to reassemble unit in
reverse order as described in steps 1-6. Number of
screws will vary depending on unit size.
3. Carefully lay the unit down on its back and remove the
remaining eight (8) screws on the left and right side of the
cabinet (Figure 3).
4. Remove the ten (10) screws and lift off the front panel/lter
rack to gain access to the cabinet interior (Figure 4).
5. Locate and remove the six (6) screws located inside the
cabinet joining the upper and lower cabinet sections
(Figure 5).
Note: Pull the insulaton away from the walls of the cabinet
interior to get access to the screws.
6. Separate the lower return air cabinet section from the upper
blower/discharge cabinet section (Figure 6).
Figure 2: Remove three (3) screws (bottom row) on the
back of the unit.
Back of Unit
Three screws (bottom row)
Figure 3: Remove remaining eight (8) screws on the left
and right sides of the cabinet
Four (4) screws located
on left side of cabinet
Figure 4: Remove the ten (10) screws from the front panel/
filter rack.
Figure 5: Remove the six (6) screws located on the interior
of the unit.
Return air cabinet
section interior
Figure 6: Separate the lower cabinet section from the
upper cabinet.

diMensional data
Model VHF & VHW – 18" × 18" Cabinet – Size 009-012
Dimensions
Unit Size 009–018 (18" ˣ 18") Cabinet (Dimensions in inches)
Unit Height
‟A” B C D E F G J K L M N P Q R S T U V
80, 88,
92, 96 18.07 18.11 37.50 0.88 58.09 2.38 3.125 2.0 2.0 6.72 12.4 7.9 3.3 3.0 3.0 3.3 4.5 4.5
Discharge Openings (Dimensions in inches)
Unit Size Single Double Triple Single- Top Opening
009–012 W H W H W H W H
14 16 14 8 NR NR 12 12
Notes: NR = Not Recommended
80" high cabinet not available with side discharge, top discharge only.
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diMensional data
Model VHF & VHW – 18" × 20" Cabinet – Size 015-018
Dimensions
Unit Size 015–018 (18" ˣ 20") Cabinet (Dimensions in inches)
Unit Height
‟A” B C D E F G J K L M N P Q R S T U V
80, 88,
92, 96 18.07 20.00 37.50 0.88 58.09 2.38 3.125 2.0 3.0 6.72 12.4 7.9 3.3 4.0 3.0 3.12 4.5 4.5
Discharge Openings (Dimensions in inches)
Unit Size Single Double Triple Single- Top Opening
015–018 W H W H W H W H
14 16 14 8 14 8 12 12
Note: 80" high cabinet not available with side discharge, top discharge only.
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diMensional data
Model VHF & VHW – 24" × 24" Cabinet – Size 021-036
Dimensions
Unit Size 021–036 (24" ˣ 24") Cabinet (Dimensions in inches)
Unit Height
‟A” B C D E F G J K L M N P Q R S T U V
80, 88,
92, 96 24.00 24.04 37.50 0.88 58.08 2.38 4.54 2.0 3.0 6.72 12.13 7.63 3.13 3.09 3.10 3.12 4.5 4.5
Discharge Openings (Dimensions in inches)
Unit Size Single Double Triple Single- Top Opening
021–024 W H W H W H W H
NR NR 18 10 18 10 18 18
030–036 NR NR 18 14 18 10 18 18
Notes: NR = Not Recommended
80" high cabinet not available with side discharge, top discharge only.
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Pre-installation Considerations
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1. To prevent damage to equipment, do not operate
supplementary heating and cooling during the construction
period.
2. Inspect the carton for any specic tagging numbers
indicated by the factory per a request from the installing
contractor. At this time the voltage, phase and capacity
should be checked against the plans.
3. Check the unit size against the plans to verify that the unit
is being installed in the correct location.
4. Before installation, check the available dimensions of the
area where the unit is to be installed versus the dimensions
of the unit.
5. Note the location and routing of water piping, condensate
drain piping, and electrical wiring. The locations of these
items are clearly marked on submittal drawings.
6. The installing contractor will nd it benecial to confer with
piping, sheet metal, and electrical foremen before installing
any unit.
Note: Check the unit data plate for correct voltage with the
plans before installing the equipment.
WARNING
Make sure all electrical ground connections are made in
accordance with local code.
WARNING
The contractor shall cover the units to protect the machines
during nishing of the building. This is critical while
spraying reproong material on bar joists, sandblasting,
spray painting and plastering.
For Optimum Unit Performance and to Help Minimize
Noise and Vibration
● Adhere to the "Critical Dimensions" for locations of framing
and distances to the cabinet.
● Be sure there are no kinks and that the stainless steel
braided hoses do not come in contact with and vibrate on
chassis and cause noise.
● Be sure there are no kinks in the condensate drain hose
that can restrict ow of condensate to the drain riser.
● Ensure there is no metal-to-metal contact between return
air grille and cabinet and the discharge diffuser and the
cabinet, use provided gaskets.
● Air balancing in ducted applications is critical for proper
airow at each diffuser.
● It is recommended that all unused openings in the cabinet
be sealed to eliminate any air leakage from the cabinet.
Figure 7: Typical side by side unit installation
NOTICE
Top air discharge units will require turning vanes and/
or a volume damper for proper air ow and balancing, to
minimize turbulence. These components must be eld-
installed and furnished in accordance with SMACNA
guidelines.

Cabinet Configurations
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Figure 8: Single side discharge
Figure 9: Double side discharge
Figure 10: Closed plenum – field modification required
Figure 11: Side & top discharge (see Notice on page 12)
Figure 12: Double side & top discharge (see Notice on
page 12)
Figure 13: Top discharge (see Notice on page 14)
= Return Riser = Supply Riser = Drain
= Return Air = Discharge Air = Top Discharge
Note: 80" high cabinet not available with side discharge, top discharge only.

Cabinet Configurations
Figure 14: Typical framing & discharge arrangements
= Return Air
= Discharge Air
Typical Ducted
Application
Double Side Discharge
NOTICE
Top air discharge units will require turning vanes and/
or a volume damper for proper air ow and balancing, to
minimize turbulence. These components must be eld-
installed and furnished in accordance with SMACNA
guidelines.
Note: All ducted applications require a unit that utilize an EC motor
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CritiCal diMensions
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Framing Locations and Dimensions
Location of framing around unit is critical for proper t-up and
will help reduce sound levels due to the transfer of vibration
when properly installed.
Figure 15: Framing locations and dimensions
Refer to page 18 for dimension “F” requirements
Refer to Table 2 through
Table 4 for “B” dimension
IMPORTANT
If an optional subbase is used, add its height of either 2",
3", 4" or 5" to the vertical dimensions shown in Figure 15.
Table 2: Letter dimensions for Figure 15 (18" x 18" unit)
Dimension
Framing Locations
18" ˣ 18" Unit - Sizes 009-012
Unit Height "A"
80" 88" 92" 96"
B14"
C2.07"
D5.75"
E122.25"
F58.75"
G260.75" 68.75" 72.75" 76.75"
H278.75" 86.75" 90.75" 94.75"
J3.125"
K33.125" Min./Max.
Table 3: Letter dimensions for Figure 15 (18" x 20" unit)
Dimension
Framing Locations
18" ˣ 20" Unit - Sizes 015 & 018
Unit Height "A"
80" 88" 92" 96"
B14"
C2.07"
D5.75"
E122.25"
F58.75"
G260.75" 68.75" 72.75" 76.75"
H278.75" 86.75" 90.75" 94.75"
J3.125"
K33.125" Min./Max.
Table 4: Letter dimensions for Figure 15 (24" x 24" unit)
Dimension
Framing Locations
24" ˣ 24" Unit - Sizes 021-036
Unit Height "A"
80" 88" 92" 96"
B18"
C2.125"
D5.75"
E128.25"
F58.75"
G262.75" 70.75" 74.75" 78.75"
H278.75" 86.75" 90.75" 94.75"
J4.54"
K33.125" Min./Max.
Notes: 1Dimension “E” ± 0.125
2
Dimension “G” and “H” will vary based on cabinet height selected and
choice of upper or lower discharge knockout.
Refer to "Dimensional Data" on page 9 through page 11.
3
Dimension “K” is critical, and that it be no more or no less than 3.125"
from the nished wall surface to the front of the unit when using the
hinged perimeter return air panel door or the louvered return air panel
door. Refer to page 18.

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Louvered Return Air Panel Door with
Optional Motorized Outdoor Air Damper
1. Based on the location of the hinges on the ordered
louvered panel door, construct the framing to accomodate
the ducting for connecting the motorized outdoor air
damper, see Figure 16. Also refer to "Return Air Panel
Door(s) Dimensions" on page 18 and "Installing The
Optional Motorized Outdoor Air Damper with Louver Panel
Door Only" on page 33 for details.
Note: It is the responsibility of the installing contractor to
install the ductwork that connects the outdoor air
opening in the panel door frame to the source of the
outdoor intake opening in the building. All ductwork
should conform to industry standards of good practice
as described in the ASHRAE Systems Guide. Also refer
to good installation practices as outlined in ED 18529.
CritiCal diMensions
Figure 16: Louvered panel door with motorized outdoor air damper
Note: The outdoor air duct can be located on either side of the cabinet and routed around the side- to the back of the cabinet, or
run straight- parallel to the front of the cabinet.

CritiCal diMensions
www.DaikinApplied.com 17 Vertical Stack WSHP • IM 986-11
Vertical Riser Stub-Outs Locations to Unit
Knockouts
Figure 17: Riser stub-outs knockouts locations
2.38"
37.50"
58.08"
1/2" Conduit Fitting
for Electrical Supply
Unit Size 021-036 = 4.54"
Unit Size 009-018 = 3.125"
Unit Front
Return Air
3"
Table 5: Letter dimensions for Figure 17 (18" x 18" unit)
Dimension
Riser Stub-Outs Locations
18" ˣ 18" Unit - Sizes 009-012
Unit Height
80" 88" 92" 96"
L3.3"
M7.9"
N12.4"
Table 6: Letter dimensions for Figure 17 (18" x 20" unit)
Dimension
Riser Stub-Outs Locations
18" ˣ 20" Unit - Sizes 015 & 018
Unit Height
80" 88" 92" 96"
L3.3"
M7.9"
N12.4"
Table 7: Letter dimensions for Figure 17 (24" x 24" unit)
Dimension
Riser Stub-Outs Locations
24" ˣ 24" Unit - Sizes 021-036
Unit Height
80" 88" 92" 96"
L3.13"
M7.63"
N12.13"

CritiCal diMensions
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Return Air Panel Door(s) Dimensions
Location of studs in relation to the unit and the return air
panel door are critical for proper installation and t up. When
installed, the return air grille gasket must compress and seal
completely against the outer edge of the cabinet and around
the inner front panel and lter bracket. Refer to "Installing The
Return Air Panel Door" on page 32 and Figure 15 on page
15.
Figure 18: Hinged panel door
Figure 19: Louvered panel door
K
G
E
F
Section D-D
Scale 1:4
Section B-B
Scale 1:2
J
BB
D
D
H
LM
N
Dimensions
Uniit Size E F G H J K Outdoor Air Opening
L M N
009-018 2.92" 17.69" 21.69" 52.53" 54.60" 23.75" 1.88" 7.00" 11.08"
021-036 23.69" 27.69" 29.75"

installation
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!
CAUTION
Installation and maintenance is to be performed only by
qualied personnel who are familiar with, and in compliance
with state, local and national codes and regulations, and
experienced with this type of equipment. Sharp edges and coil
surfaces are potential injury hazards. Avoid contact with them.
Risers and Cabinet
1. Position the cabinet and risers within the building pipe
chase and align with the unit on the oor above and/or
below (Figure 20).
Figure 20: Position the cabinet and risers
Supply, Return
and Condensate
Risers
Riser Expanded Pipe
(Factory-Installed Option) to
Connect to Unit Above
Risers Through
Floor Opening
Stud Wall Floor Plate
and Finish Wall
Location
Riser Expanded
Pipe Connect to
Unit Above
IMPORTANT
The cabinet must be centered between the wall studs and
plumb vertically for the grille/panel frame and diffuser to
properly align and seal to the cabinet. Use of a 4' level is
recommended.
Note: Refer to Figure 21 Critical Dimension Notice to
determine the correct recess depth from the front of
the unit to the drywall face. When the installation is
complete, the return air grille/panel frame must meet
to seal with the cabinet discharge opening and the
discharge air diffuser duct must meet and seal with the
discharge opening.
2. Using the riser extensions, make preliminary riser
connections between the units above and or below
to assure proper riser alignment (supply, return and
condensate). Figure 20.
3. After all components are aligned properly, anchor the unit
cabinet to the oor using the Daikin provided mounting
brackets (Figure 21).
4. Locate the two (2) mounting brackets in the parts bag
and position them near the back corners of the unit, or
one on a side and one on the back, whichever location or
combination is most suitable, as illustrated in Figure 21.
Contractor is responsible for the appropriate fasteners to
secure the brackets to the oor, as local codes dictate.
Figure 21: Position the cabinet for securing to the floor
with mounting brackets (2)
Provided Mounting
Brackets (2)
Fasteners (by others)
Finished Wall
Stud Wall Floor Plate
Unit Front
Cabinet edge 3
-
1/8" from face
of nished wall
Back of
Unit
NOTICE
Critical Dimension!

installation
IM 986-11 • Vertical Stack WSHP 20 www.DaikinApplied.com
Note: Apply the provided seal to the interior of the cabinet
around the stub-outs. Be sure there are no voids
between the stub-outs and the stub-out seal which
helps prevent air inltration into the cabinet
Figure 22: Center the riser stub-outs within the knockouts
and apply provided seal to the cabinet interior
Riser Knockouts
Stub-Out Connections
with Valves Centered
within Knockouts
Provided loose,
Stub-Out Seal
(Field Installed)
Cabinet
Interior
Knockouts
on Cabinet
Exterior
No Gaps in Seal to
Prevent Air Infiltration
CAUTION
The unit is not designed to support the weight of the risers.
Anchor them securely to the building structure..
5. Anchor risers to the building structure to prevent vertical
riser movement greater than, plus or minus one inch to
allow for riser expansion or contraction.
6. Solder all supply and return riser connections to units
above and/or below.
7. Remove riser ties used to secure the risers to the cabinet
during shipping.
WARNING
Before furring-in units, hydrostatically test the risers and
unit connection joints in accordance with local building
codes, to make sure they are leak-proof.
Note: Perform "Cleaning and Flushing Water System" on
page 22
CAUTION
When furring-in units make sure that no screws or nails
penetrate the unit cabinet.
8. Layout the stud wall oor plates and frame-in unit
referencing "Typical framing & discharge arrangements" on
page 14 and Figure 15 on page 15.
Note: Before cutting and hanging drywall, remove the
appropriate discharge air opening knockout. See
Table 8). Protect unit from construction debris with a
protective cover.
Table 8: Discharge knockout openings
Unit
Size
Discharge Openings
Single Double Triple Single-Top
Opening
W H W H W H W H
009–012 14" 16" 14" 8" NR NR 12" 12"
015–018 14" 16" 14" 8" 14" 8" 12" 12"
021–024 NR NR 18" 14" 18" 10" 18" 18"
030–036 NR NR 18" 14" 18" 10" 18" 18"
NR = Not Recommended