Daikin IM 986-2 VHF Instruction Manual

Installation & Maintenance Manual
Vertical Stack Water Source Heat Pumps
Model VHC Vertical Stack Chassis
Model VHF Vertical Stack Cabinet
Unit Sizes 009 – 036 / R-410A Refrigerant
Group: WSHP
Part Number: 669646403
Date: May 2012
IM 986-2
©2012 McQuay International • 800.432.1342 • www.daikinmcquay.com

Page 2 of 48 / IM 986-2

IM 986-2 / Page 3 of 48
Table of Contents
Model Nomenclature ............................ 4-5
Vertical Stack Model VHF (Cabinet)...............4
Vertical Stack Model VHC (Chassis)...............5
Receiving, Storage & Handling ................... 6-7
Disassembling Upper & Lower Cabinet Sections..... 7-8
Dimensional Data.............................. 9-10
Unit Size 009-018..............................9
Unit Size 021-036.............................10
Pre-Installation Considerations ....................11
Cabinet Configurations...........................12
Typical Framing & Discharge Arrangements.........13
Critical Dimensions ..............................14
Framing Locations to Unit Openings..............14
Vertical Riser Stub-Outs Locations to
Unit Knockouts...............................14
Return Air Grille/Panel Dimensions...............15
Installation Procedure......................... 16-26
Risers & Cabinet........................... 16-17
Cleaning & Flushing Water System............ 17-19
Power Wiring From Building to Unit........... 19-20
Connect Condensate Drain Hose to Drain Stubout ...20
Water Connections ......................... 20-21
Installing Unit Chassis .........................22
Making Cabinet to Chassis Wiring Connections . . . . . 22
Installing & Wiring the Remote Control Node ......23
Installing the Return Air Grille/Panel..............24
Installing the Discharge Air Diffuser ..............25
Twin Units Installation .........................26
Controls..................................... 27-34
MicroTech III Unit Controller ...................27
Remote Reset Feature..........................27
MicroTech III Controller Terminal Locations
& Descriptions ............................ 28-29
I/O Expansion Module .........................30
MicroTech III Controller with Lon Module.........31
MicroTech III Controller with BACnet Module .. 32-33
MicroTech III Controller with Lon Module on
Board Diagram ...............................34
Typical Wiring Diagrams ...................... 35-38
MicroTech III Unit Controller, 2-Speed Fan (Toggle or
Thermostat), PSC Motor 208-230/60Hz/1-Phase,
Unit Sizes 009-018............................35
MicroTech III Unit Controller, 2-Speed Fan (Toggle or
Thermostat), PSC Motor 265-277/60Hz/1-Phase,
Unit Sizes 009-036............................36
MicroTech III Unit Controller, 2-Speed Fan (Toggle or
Thermostat), X13 Motor 208-230/60Hz/1-Phase,
Unit Sizes 021-036............................37
MicroTech III Unit Controller, 2-Speed Fan (Toggle or
Thermostat), X13 Motor 265-277/60Hz/1-Phase,
Unit Sizes 021-036............................38
Start-up........................................39
Additional Accessories (General) ................ 39-43
Thermostats & Temperature Sensors ........... 39-43
Troubleshooting .............................. 44-47
The in and outs of R-410A......................44
Refrigeration Circuit...........................45
The Water Source Heat Pump Unit ...............46
General Use & Information .....................47

Page 4 of 48 / IM 986-2
Vertical Stack Water Source Heat Pump – Cabinet (VHF)
Model Nomenclature
Unit Size - Tons
009 - 3/4 Ton
012 - 1 Ton
015 - 1-1/4 Ton
018 - 1-1/2 Ton
021 - 1-3/4 Ton
024 - 2 Ton
030 - 2-1/2 Ton
036 - 3 Ton
Controls
B - MicroTech III
C - MicroTech III With LonWorks
D - MicroTech III With BACnet
Voltage
A - 115/60/1 ph
E - 208-230/60/1 ph
J - 265-277/60/1 ph
Secondary Drain Pan
GL - Standard Galvanized Steel
SS - Stainless Steel
Product
Category
W - WSHP
Product Code
VHF - Cabinet
Design Series
1
2
Cabinet Type
080 - 80" Cabinet Height
088 - 88" Cabinet Height
092 - 92" Cabinet Height
096 - 96" Cabinet Height
Filter Option
S - Standard 1" Throwaway
P - 2" Pleated (Merv 7)
Y - None
Blower Motor
12 - 2-Speed PSC Motor
32 - ECM 2-speed 2.3 Motor
33 - ECM 2-speed X13 Motor
Power Connection
F - Fused Disconnect
N - Non-Fused Disconnect
H - HACR Breaker
Supply Air Conguration
LYY - Single Supply Outlet, Left Side
RYY - Single Supply Outlet, Right Side
FYY - Single Supply Outlet, Front Side
BYY - Single Back Side Supply Outlet
TYY - Single Top Supply Outlet
LFY - Double Supply, Left Side and Front Side
LRY - Double Supply, Left Side and Right Side
LBY - Double Supply, Left Side and Back Side
RFY - Double Supply, Right Side and Front Side
RBY - Double Supply, Right Side and Back Side
BFY - Double Supply, Back Side and Front Side
LTY - Double Supply, Left Side and Top
RTY - Double Supply, Right Side and Top
BTY - Double Supply, Back Side and Top
FTY - Double Supply, Front Side and Top
LFT - Triple Supply, Left Side, Front Side and Top
LRT - Triple Supply, Left Side, Right Side and Top
FRT - Triple Supply, Front Side, Right Side and Top
FBT - Triple Supply, Front Side, Back Side and Top
BRT - Triple Supply, Back Side, Right Side and Top
BLT - Triple Supply, Back Side, Left Side and Top
YYY - Closed Supply Plenum for eld modication
W VHF 1 009 B E DP LRY F 12 S 088
Note: For illustration purposes only. Not all options avail-
able with all models.
Please consult McQuay Sales Representative for
specic availability.

IM 986-2 / Page 5 of 48
Model Nomenclature
Vertical Stack Water Source Heat Pump – Chassis (VHC)
Unit Size - Tons
009 - 3/4 Ton
012 - 1 Ton
015 - 1-1/ 4 Ton
018 - 1-1/2 Ton
021 - 1-3/4 Ton
024 - 2 Ton
030 - 2-1/2 Ton
036 - 3 Ton
Controls
B - MicroTech III
C - MicroTech III With LonWorks
D - MicroTech III With BACnet
Voltage
A - 115/60/1 ph
E - 208-230/60/1 ph
J - 265-277/60/1 ph
Product
Category
W - WSHP
Product Code
VHC - Chassis
Design Series
1
2
Coax Coil Construction
C - Copper Inner - Steel Outer
S - CuproNickel Inner - Steel Outer
X - Special
Chassis Construction
AYY - Standard Fiberglass Insulation
EYY - IAQ - Cellular Insulation
AMY - Standard w/Compressor Blanket
EMY - IAQ w/Compressor Blanket
AYC - Standard w/E-Coated Air Coil
EYC - IAQ - Cellular w/E-Coated Air Coil
AMC - Standard w/Comp Blanket and Coated Air Coil
EMC - IAQ w/Comp Blanket and Coated Air Coil
Motorized 2-Way Isolation Valve
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)
Y - None
X - Special
Refrigerant
A - R-410A
X - Special
W VHC 1 012 B E A C AMY C
Note: For illustration purposes only. Not all options
available with all models.
Please consult McQuay Sales Representative
for specic availability.

Page 6 of 48 / IM 986-2
Cabinet Skid (4-units per skid)
Never stack cabinets higher than as illustrated in Figure
1 at any time during transportation or storage or damage
may occur.
Figure 1: Unit Cabinet Skid as Shipped and Stored
Chassis Skid (4 per skid, stored two skids high)
Never stack chassis´ higher than as illustrated in Figure
2 at any time during transportation or storage or damage
may occur.
Figure 2: Chassis Skids Stacked 2 High Maximum
Storage and Operating Environment
Temporary storage at the job site must be indoor,
completely sheltered from rain, snow, etc. High or low
temperatures naturally associated with weather patterns
will not harm the units. Excessively high temperatures,
140°F (60°C) and higher, may deteriorate certain plastic
materials and cause permanent damage.
Storage Temperature:
-40ºF (-40ºC) to 140ºF (60ºC)
Operating Temperature:
32ºF (0ºC) to 140ºF (60ºC)
Humidity:
10%RH to 90%RH Non-condensing
PCB Material and Flammability Rating:
IPC/ANSI FR or CEM material as required to meet UL
94V-0 ammability rating.
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.
For storing, each carton is marked with “up” arrows.
IMPORTANT
This product was carefully packed and thoroughly
inspected before leaving the factory. Responsibility for its
safe delivery was assumed by the carrier upon acceptance
of the shipment. Claims for loss or damage sustained in
transit must therefore be made upon the carrier as follows:
VISIBLE LOSS OR DAMAGE
Any external evidence of loss or damage must be noted
on the freight bill or carrier’s receipt, and signed by the
carrier’s agent. Failure to adequately describe such
external evidence of loss or damage may result in the
carrier’s refusal to honor a damage claim. The form
required to le such a claim will be supplied by the carrier.
CONCEALED LOSS OR DAMAGE
Concealed loss or damage means loss or damage which
does not become apparent until the product has been
unpacked. The contents may be damaged in transit due
to rough handling even though the carton may not show
external damages. When the damage is discovered upon
unpacking, make a written request for inspection by the
carrier’s agent within fteen (15) days of the delivery date
and le a claim with the carrier.
4'
6'

IM 986-2 / Page 7 of 48
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.
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 plugging lines or valves. See
"Cleaning & Flushing Water System" on page 16.
General Information
McQuay 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.
WARNING
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.
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.
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 (Figures 3).
Component Descriptions (Assembled
Cabinet)
1. Cabinet assembly complete (without chassis)
1a. Pipe riser sets (inlet, outlet 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)
Figure 3: 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
CAUTION
Sharp metal edges are a hazard, use care when servicing
to avoid contact with them.
!

Page 8 of 48 / IM 986-2
Figure 5: Remove remaining eight (8) screws on the left and
right sides of the cabinet
Figure 6: Remove the ten (10) screws from the front panel/
lter rack.
Figure 7: Remove the six (6) screws located on the interior
of the unit.
Figure 8: Separate the lower cabinet section from the upper
cabinet
Four (4) screws located
on left side of cabinet
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 4.
Note: Retain all screws for later use to reassemble
unit in reverse order as described in steps 1-7.
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 5).
5. Remove the ten (10) screws and lift off the front
panel/lter rack to gain access to the cabinet interior
(Figure 6).
6. Locate and remove the six (6) screws located inside
the cabinet joining the upper and lower cabinet
sections (Figure 7).
Note: Pull the insulaton away from the walls of the
cabinet interior to get access to the screws.
7. Separate the lower return air cabinet section from
the upper blower/discharge cabinet section
(Figure 8).
Figure 4: Remove three (3) screws (bottom row) on the back
of the unit.
Back of Unit
Three screws (bottom row)
Return air cabinet
section interior

IM 986-2 / Page 9 of 48
Front View
Left Side View
Top View
Dimensional Data
Figure 9: Model VHC/VHF – 18" × 18" Cabinet – Size 009-018
Dimensions
Unit Size A B C D E F G J K L M N P Q
80" 18.07" 18.11" 37.50" .88" 58.09" 2.38" 3.125" 2" 2" 6.72" 12.4" 7.9" 3.3"
009–018 88" 18.07" 18.11" 37.50" .88" 58.09" 2.38" 3.125" 2" 2" 6.72" 12.4" 7.9" 3.3"
18" × 18" 92" 18.07" 18.11" 37.50" .88" 58.09" 2.38" 3.125" 2" 2" 6.72" 12.4" 7.9" 3.3"
Cabinet 96" 18.07" 18.11" 37.50" .88" 58.09" 2.38" 3.125" 2" 2" 6.72" 12.4" 7.9" 3.3"
A R S T U V
80" 3" 3" 3.3" 4.5" 4.5"
88" 3" 3" 3.3" 4.5" 4.5"
92" 3" 3" 3.3" 4.5" 4.5"
96" 3" 3" 3.3" 4.5" 4.5"
Discharge Openings
Unit Size Single Double Triple Single-Top Opening
W H WH WH W H
009 – 012 14" 16" 14" 8" NR NR 12" 12"
015 – 018 14" 16" 14" 8" 14" 8" 12" 12"
Table 1.
NR = Not Recommended

Page 10 of 48 / IM 986-2
Front View
Left Side View
Top View
Discharge Openings
Unit Size Single Double Triple Single-Top Opening
W H WH WH W H
021 – 024 NR NR 18" 10" 18" 10" 18" 18"
030 – 036 NR NR 18" 14" 18" 10" 18" 18"
A R S T U V
80" 3.09" 3.10" 3.12" 4.50" 4.50"
88" 3.09" 3.10" 3.12" 4.50" 4.50"
92" 3.09" 3.10" 3.12" 4.50" 4.50"
96" 3.09" 3.10" 3.12" 4.50" 4.50"
Dimensions
Unit Size A B C D E F G J K L M N P Q
80" 24" 24.04" 37.50" .88" 58.08" 2.38" 4.54" 2" 3" 6.72" 12.13" 7.63" 3.13"
021–036 88" 24" 24.04" 37.50" .88" 58.08" 2.38" 4.54" 2" 3" 6.72" 12.13" 7.63" 3.13"
24" × 24" 92" 24" 24.04" 37.50" .88" 58.08" 2.38" 4.54" 2" 3" 6.72" 12.13 7.63" 3.13"
Cabinet 96" 24" 24.04" 37.50" .88" 58.08" 2.38" 4.54" 2" 3" 6.72" 12.13" 7.63" 3.13"
Table 1.
NR = Not Recommended
Dimensional Data
Figure 10: Model VHC/VHF – 24" × 24" Cabinet – Size 021-036