ClimateMaster TRM Series Guide

Tranquility Modular
(TRM Series)
Vertical Stack
(VHS) Series
Commercial Vertical Stack
Water-Source Heat Pumps
Installation, Operation &
Maintenance Instructions
97B0056N01
Revision: Nov. 5, 2009B
Table of Contents
Model Nomenclature 3
General Information 7
Riser & Cabinet Installation 9
Cabinet Installation 12-14
Piping Installation 15
Water-Loop Heat Pump Applications 16
Ground-Loop Heat Pump Applications 16
Ground-Water Heat Pump Applications 18
Water Quality Standards 20
Electrical Wiring - Line Voltage 21
Electrical Wiring - Low Voltage 22
Thermostat Installation 23
Chassis Pre-Installation 24
Unit Start-Up Preparation 27
Hose Kit & Chassis Installation 28
CXM Controls 32
DXM Controls 33
Safety Features - CXM/DXM Controls 35
Unit Commissioning
and Operating Conditions 36-37
Piping System Cleaning and Flushing 37
Unit and System Checkout 38
Unit Start-Up Procedures 39
Unit Operating Conditions 40-42
Start-Up Log Sheet 43
Preventative Maintenance 44
Troubleshooting 45-46
Troubleshooting Form 47
Warranty 48
Revision History 50

3
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Vertical Stack
Rev.: Nov. 5, 2009B
climatemaster.com
TRM & 816 Model Nomenclature
Cabinet
TOP DISCHARGE OPENINGS BY UNIT SIZE
UNIT SIZE OPENING
816-10 & 15/TRM-09 & 12 10” x 10”
816-20/TRM-15 & 18 13” x 13”
816-28, 30 & 36/TRM-24, 30 &36 17” x 17”
RETURN
AIR
POSITION
FRONT
FRONT
FRONT
FRONT
RIGHT
RIGHT
RIGHT
RIGHT
LEFT
LEFT
LEFT
LEFT
DIGIT
9 & 10
1A
1B
1C
1D
1E
1F
1G
1H
1J
1K
1L
1M
SUPPLY AIR POSITION
FRONT RIGHT LEFT TOP
X- - -
-X--
-- X-
-- -X
X- - -
-X--
-- X-
-- -X
X- - -
-X - -
-- X-
-- -X
QUANTITY OF
AIR FLOW
SUPPLIES
S
I
N
G
L
E
S
U
P
P
L
Y
RETURN
AIR
POSITION
FRONT
FRONT
FRONT
FRONT
RIGHT
RIGHT
RIGHT
RIGHT
LEFT
LEFT
LEFT
LEFT
DIGIT
9 & 10
3A
3B
3C
3D
3E
3F
3G
3H
3J
3K
3L
3M
SUPPLY AIR POSITION
FRONT RIGHT LEFT TOP
XX X-
XX - X
X- X X
-XXX
XX X-
XX - X
X- X X
-XXX
XX X-
XX - X
X- X X
-XXX
QUANTITY OF
AIR FLOW
SUPPLIES
T
R
I
P
L
E
S
U
P
P
L
Y
RETURN
AIR
POSITION
FRONT
FRONT
FRONT
FRONT
FRONT
FRONT
RIGHT
RIGHT
RIGHT
RIGHT
RIGHT
RIGHT
DIGIT
9 & 10
2A
2B
2C
2D
2E
2F
2G
2H
2J
2K
2L
2M
SUPPLY AIR POSITION
FRONT RIGHT LEFT TOP
XX- -
X- X-
X- - X
-XX-
-X-X
-- XX
XX - -
X- X-
X- - X
-X X-
-X-X
-- XX
QUANTITY OF
AIR FLOW
SUPPLIES
D
O
U
B
L
E
S
U
P
P
L
Y
RETURN
AIR
POSITION
FRONT
RIGHT
LEFT
DIGIT
9 & 10
4A
4B
4C
SUPPLY AIR POSITION
FRONT RIGHT LEFT TOP
XXX X
XXXX
XXXX
QUANTITY OF
AIR FLOW
SUPPLIES
LEFT
LEFT
LEFT
LEFT
LEFT
LEFT
2N
2P
2Q
2R
2S
2T
XX - -
X- X-
X- - X
-X X-
-X-X
--XX
QUAD
SUPPLY
RETURN
AIR
POSITION
FRONT
RIGHT
LEFT
DIGIT
9 & 10
0A
0B
0C
SUPPLY AIR POSITION
FRONT RIGHT LEFT TOP
--- -
----
-- --
QUANTITY OF
AIR FLOW
SUPPLIES
NO
SUPPLY
(Zero)
S
U
P
P
L
Y
D
R
A
I
N
R
E
T
U
R
N
BACK
LEFT
FRONT
RIGHT
3
OPTION
C
D
E
F
G
H
L
M
N
P
R
S
X
-
-
-
-
-
X
-
X
X
-
-
W
1
2
3
4
5
6
-
-
-
-
-
-
7
8
O
-
-
NO OPTION
CXM -
X
X
X
X
X
-
X
-
-
X
X
X
X
X
X
X
X
X
X
DXM
X-MOTOR
SURFACE/
REMOTE/
WALL SENSOR
W
W
W
R
S
W
W
R
S
R
S
R
S
R
S
W
W
W
W
-
-
-
-
-
-
-
-
-
-
-
-
X
X
X
X
X
X
X
X
MPC/
LON
M
M
M
L
-
-
L
L
-
-
-
-
-
-
-
-
M
M
L
L
-
-
X
X
X
X
-
-
-
-
-
-
-
-
X
X
-
X
-
X
N.O.
MWV
A
B
C
D
E
H
M
-
X
X
-
X
X
-
-
X
-
X
X
X
-
-
MANUAL AIR VENT
X
-
X
X
-
X
S.S. DRAIN PANHI STATIC MOTOROPTION
A
C
D
E
F
G
H
J
X
-
X
-
-
X
-
-
-
X
-
X
-
-
X
NLLS
-
X
X
X
-
-
BREAKERDISCONNECT SWITCHOPTION
ONO OPTIONS
---
-
2 SPD FAN SW
-
-
-
-
X
X
X
A
B
C
D
E
F
G
H
-
X
-
X
-
X
-
-
X
-
X
-
X
-
X
8” CABINET STAND
-
X
X
-
-
X
88”80”
OPTION
X-X
-
ISO PAD
-
-
-
X
X
X
X
1
2
3
4
5
6
7
O
-
X
X
-
X
X
-
NO OPTIONS
-
X
-
X
X
X
-
-
X
-
X
X
-
X
-
RISER CHASE
-
-
-
-
-
-
X
X
X
X
X
X
X
G
E208-230/60/1
Volt/Hertz/PhazeOPTION
265/60/1
2
3
4
6
-
-
-
X
X
X
-
-
-
-XX
-
-
-
-
-
ELECTRIC HEAT
-
-
-
-
-
-
-
2.5Kw
5.0Kw
7.5Kw
2.5Kw
7
8-XX
-XX-
-5.0Kw
7.5Kw
0 9 S NG 1 AA O O O O A
1 2 3 4 6
8
9 10 11 12 13 14 15
CONTROLS RETURN & SUPPLY AIR
FRONT
LEFT
RIGHT O = STANDARD
STANDARD
A, B, C etc.... = SPECIAL 1, 2, 3 etc....
REVISION LEVEL
O
5
A
7
SUPPLY AIR OPENING SIZES
A = 10”W x 6”H
B = 10”W x 8”H
C = 10”W x 10”H
D = 12”W x 10”H
E = 12”W x 12”H
F = 12”W x 6”H
G = 14”W x 6”H
H = 14”W x 8”H
M = 16”W x 6”H
P = 16”W x 10”H
Q = 16”W x 12”H
R = 16”W x 14”H
O = NO OPENINGS
A = CURRENT R410A UNITS
OPTIONS
POWER TERMINATION
CABINET HEIGHT
VOLTAGE
A = STANDARD
CABINET STYLE
B = STANDARD
C = MASTER
D = SLAVE
E = MASTER
F = SLAVE
P = STANDARD
S = STANDARD
Q = MASTER
R = SLAVE
T = MASTER
U = SLAVE
R22R410A (816)(TRM)
.625 Flange
“H” PANEL
1.250 Flange
“G” PANEL
.625 Flange
“H” PANEL
1.250 Flange
“G” PANEL
SIZE / R22 SIZE / R410A
10 09
15 12
15=(cab size 18)
18
20
2428 3030 3636
UNIT SIZE
(816) (TRM)

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
4ClimateMaster Water-Source Heating and Cooling Systems
TRM Model Nomenclature
Chassis
TRM = Tranquility High Rise Chassis
T R M
1 2 3
09, 12, 15, 18, 24, 30, 36
09 G
Series
Unit Size
Voltage
Options
S S S C S A
4 5 6 7 8 9 10 11 12
Water Valve & Pump Option
S = No Water valve
M = Normally Closed Water Valve
N = Normally Open Water Valve
P = Secondary Circulating Pump
Standard
S = Standard
Revision Level
A = Current Revision Level
Heat Exchanger Options
7/8 SWEAT
3.0
2.5
2.0
1.5
UNIT
09
E
H
G
F
D
C
5/8 SWEAT
4.0
3.5
3.0
UNIT
15 & 18
2.5
4.0
3.5
3.0
2.0
UNIT
12
4.0
UNIT
24 UNIT 30 UNIT 36
2.5
K
P
N
M
L6.0
8.0
9.0
7.0
6.0
8.0
10.0
9.0
7.0
6.0
J5.05.0 5.0 5.0 6.0
8.0
10.0
9.0
7.0
S = STANDARD - NO FLOW REGULATOR
3.5
7.0
G = 208-230/60/1
S = Standard for use with CXM or DXM
A = Standard w/Stainless Steel Drain Pan
B = Standard w/Return Air Sensor
C = Standard w/Return Air Sensor & Stainless Steel Drain Pan
Auto Flow Regulator
E = 265/60/1
Rev.: 18 June, 2008B
Standard
Extended Range
Non Coated Air Coil Coated Air Coil
Copper Cupro-Nickel Copper Cupro-Nickel
L
F
M
G
C
D
N
E
M = Ultraquiet

5
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Vertical Stack
Rev.: Nov. 5, 2009B
climatemaster.com
VHS Model Nomenclature
Chassis
816 Chassis
8 1 6
1 2 3
10, 15, 20, 28, 30, 36
1 0 G
Model Type
Unit Size
Voltage
Controls
S P S S C O Q
4 5 6 7 8 9 10 11 12 13
Automatic Flow Regulator (US gpm)
Heat Exchanger Options
Water Valve & Pump Option
S = No Water valve
M = Normally Closed Water Valve
N = Normally Open Water Valve
P = Secondary Circulating Pump
Standard
O = Standard
Revision Level
7/8 SWEAT
3.0
2.5
2.0
1.5
UNIT
10
E
H
G
F
D
C
5/8SWEAT
4.0
3.5
3.0
UNIT
20
2.5
4.0
3.5
3.0
2.0
UNIT
15
4.0
UNIT
28 UNIT 30 UNIT 36
2.5
K
P
N
M
L6.0
8.0
9.0
7.0
6.0
8.0
10.0
9.0
7.0
6.0
J5.05.0 5.0 5.0 6.0
8.0
10.0
9.0
7.0
Q = Current Revision Size 20 - 36
S = NO FLOW REGULATOR
C = Copper Coax w/Coated Air Coil
N = Cupro-Nickel Coax w/Coated Air Coil
L = Copper Coax w/Non-CoatedAir Coil
M = Cupro-Nickel Coax w/Non-Coated Air Coil
E = 265/60/1
G = 208-230/60/1
H = Copper, RV Energized in Heating w/Coated Air Coil (Replacement Only)
J = Cupro-Nickel, RV Energized in Heating w/CoatedAir Coil (Replacement Only)
P = Standard (24V N.C. Safeties) for use with CXM or DXM
S = Current Revision Size 10 & 15
Rev.: 06 Nov, 2008B
21
OPTION S.S. Drain
Pan
B
C
D
A
F
G
H
E
J
K
S
L
Insulated
Tubing
X
-
X
-
X
X
-
-
-
X
-
X
-
-
X
X
-
X
-
X
X
-
-
X
AST008
RAS
-
-
-
-
-
-
X
-
X
X
-
X
AST009
RAS
-
X
-
-
X
X
-
X
-
-
-
-

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
6ClimateMaster Water-Source Heating and Cooling Systems
Supply Air Grille
Accessory Nomenclature
A 8 1 6 G A1 0 0 6S S
1 2 3 4 5 9 10 11 127 8
Supply Air Grille
Material & Color Dimensions
C = Double Deflection w/Opposed Damper
Grille Deflection
SS = Brushed Aluminum
A = Single Deflection
B = Double Deflection
6
1006 = 10"W x 6"H
Available From 10"H x 6"W to 16"W x 14"H
SP = Painted Aluminum, Polar Ice
O
13
Special Options
O = Standard
Always "O" Unless Special Option
Quoted From Factory
A
14
Revision Level
A = Current
Rev.: 10/04/05D
0 5 0A H H B2
1 2 3 4 5 6 8
Group
AHH = Accessory Hose Kit Hi-Rise
Hose Size
050 = 1/2” Nominal
Length
Revision Level
7
075 = 3/4” Nominal
100 = 1” Nominal
B = Current Revision
2 = Length in Feet
3 = Length in Feet
Rev.: 10/04/05D
Return Air Panel
Hose Kit
A V H S G 1 S F S S
1 2 3 4 5
6
789 11
Accessory Return Air Panel
S = Standard (Polar Ice)
Color
F = Fiberglass
Insulation Type
Style
J = Current Revision (”H” Panel)
Revision Level
AVHSG = G-Panel
AVHSH = H-Panel
L = Current Revision (”G” Panel)
S = G & H Panel - Standard
L = G-Panel - Door w/Key Locks
G = G-Panel - Door W/Grille
L
10
Standard
S = Standard
Unit Size
OPTION
1
2
3
TRM
09 & 12
15 & 18
24, 30 & 36
M = H-Panel - w/Motorized Damper
K = G-Panel - Door w/Key Locks & Grille
Rev.: 10/23/06D

7
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Vertical Stack
Rev.: Nov. 5, 2009B
climatemaster.com
General Information
WARNING! To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must be
serviced only by technicians who meet local, state, and
federal proficiency requirements.
WARNING! All refrigerant discharged from this unit must be
recovered WITHOUT EXCEPTION. Technicians must follow
industry accepted guidelines and all local, state, and federal
statutes for the recovery and disposal of refrigerants. If a
compressor is removed from this unit, refrigerant circuit oil will
remain in the compressor. To avoid leakage of compressor oil,
refrigerant lines of the compressor must be sealed after it is
removed.
CAUTION! To avoid equipment damage, DO NOT use
these units as a source of heating or cooling during the
construction process. The mechanical components and
filters will quickly become clogged with construction dirt
and debris, which may cause system damage.
 WARNING! 
 WARNING! 
 WARNING! 
 CAUTION! 
Safety
Warnings, cautions and notices appear throughout this manual.
Read these items carefully before attempting any installation,
service or troubleshooting of the equipment.
DANGER: Indicates an immediate hazardous situation, which
if not avoided will result in death or serious injury. DANGER
labels on unit access panels must be observed.
WARNING: Indicates a potentially hazardous situation, which if
not avoided could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation or an
unsafe practice, which if not avoided could result in minor or
moderate injury or product or property damage.
NOTICE: Notification of installation, operation or maintenance
information, which is important, but which is not hazard-
related.
WARNING! Verify refrigerant type before proceeding. Units
are shipped with R-22, R-407c and R-410A (EarthPure
®
)
refrigerants. The unit label will indicate which refrigerant is
provided. The EarthPure
®
Application and Service Manual
should be read and understood before attempting to service
refrigerant circuits with R-407c or R-410A.

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
8ClimateMaster Water-Source Heating and Cooling Systems
Inspection
Upon receipt of the equipment, carefully check the
shipment against the bill of lading. Make sure all units
have been received. Inspect the packaging of each unit,
and inspect each unit for damage. Insure that the carrier
makes proper notation of any shortages or damage on all
copies of the freight bill and completes a common carrier
inspection report. Concealed damage not discovered
during unloading must be reported to the carrier within
15 days of receipt of shipment. If not filed within 15 days,
the freight company can deny the claim without recourse.
Note: It is the responsibility of the purchaser to file all
necessary claims with the carrier. Notify your equipment
supplier of all damage within fifteen (15) days of shipment.
Storage
Equipment should be stored in its original packaging in a
clean, dry area. Store chassis in an upright position at all
times. Stack units at a maximum of 2 units high.
Store cabinets horizontally, keeping them on their pallets
to protect the risers. Do not stack multipacks. Stack
single cabinets at a maximum of 3 units high.
Unit Protection
Cover units on the job site with either the original
packaging or an equivalent protective covering. Cap
the open ends of pipes stored on the job site. In areas
where painting, plastering, and/or spraying has not been
completed, all due precautions must be taken to avoid
physical damage to the units and contamination by
foreign material. All openings in cabinet must be covered
during all stages of construction. Physical damage and
contamination may prevent proper start-up and may result
in costly equipment clean-up.
Examine all pipes, fittings, and valves before installing
any of the system components. Remove any dirt or
debris found in or on these components.
Prior to flushing risers with water, be sure that the
temperature in building will always be above freezing.
Pre-Installation
Installation, Operation, and Maintenance instructions
are provided with each unit. The installation site chosen
should include adequate service clearance around the
unit. Before unit start-up, read all manuals and become
familiar with the unit and its operation. Thoroughly check
the system before operation.
Prepare cabinet for installation as follows:
1. Compare the electrical data on the unit nameplate
with ordering and shipping information to verify that
the correct unit has been shipped.
2. Each cabinet has a tag to indicate the location to be
installed and the riser diameter.
3. Keep the cabinet openings and exposed sheet
metal covered until installation is complete and all
plastering, painting, etc. is finished.
4. Inspect all electrical connections. Connections must
be clean and tight at the terminals.
Prepare chassis for installation as follows:
1. Verify refrigerant tubing is free of kinks or dents and
that it does not touch other unit components.
2. Inspect all electrical connections. Connections must
be clean and tight at the terminals.
3.
Remove compressor shipping clips, bracket, or
screws. See chasss pre-installation section for
instructions.
4. If chassis is not installed in cabinet, store in original
carton.
CAUTION! DO NOT store or install units in corrosive
environments or in locations subject to temperature or
humidity extremes (e.g., attics, garages, rooftops, etc.).
Corrosive conditions and high temperature or humidity can
significantly reduce performance, reliability, and service life.
Always move and store units in an upright position. Tilting
units on their sides may cause equipment damage.
NOTICE! Failure to remove shipping brackets from spring-
mounted compressors will cause excessive noise, and could
cause component failure due to added vibration.
 CAUTION! 
 CAUTION! 
CAUTION! CUT HAZARD - Failure to follow this caution
may result in personal injury. Sheet metal parts may have
sharp edges or burrs. Use care and wear appropriate
protective clothing, safety glasses and gloves when
handling parts and servicing heat pumps.
General Information

9
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Vertical Stack
Rev.: Nov. 5, 2009B
climatemaster.com
Supply and Return Piping
1. Install a drain valve, shut-off/balancing valves, flow
indicators and drain tees at the base of each supply
and return riser to enable system flushing at start-up,
balancing and during servicing.
2. Install strainers at the inlet of each circulating pump.
3. Insulate loop water piping which runs through
nonconditioned areas or outside the building.
Because loop temperature is normally between 60° F
and 90° F, piping does not sweat or suffer heat loss
under ambient conditions.
Condensate Piping
Condensate connection between the drain pan assembly
and condensate riser is factory installed and trapped in
VHS cabinet.
Riser Connections
1. NOTE: Cabinet and riser assemblies are designed
to accommodate a maximum of 1-½" expansion
and 1-½” contraction. If the calculated riser stack
expansion or contraction exceeds 1-½”, expansion
devices must be provided.
2. Slab slot opening must allow for how cabinet will
be set upright (see submittal). Openings should be
aligned from floor to floor.
NOTE: All riser modifications necessitated by variations
in floor-to-floor dimensions including cutting off or
extending risers or modifications due to misalignment is
the sole responsibility of the installing contractor.
Cabinet Installation
1. Each cabinet was ordered and built for a specific
location in building. Check tag information before
installing. Tag is located on bottom and lower front of
cabinet. Do not remove and discard shipping brace
until chassis is installed. For proper cabinet/riser
installation, installer must have access to all sides.
2. Move cabinet into position. CAUTION: Keep risers
Riser & Cabinet Installation
 CAUTION! 
CAUTION! To ensure correct riser positioning and to
compensate for variations in floor-to-floor dimensions, do
not allow the unit to unit riser joint to bottom out.
 WARNING! 
WARNING! To avoid damage from clogged coil surfaces,
clogged motor ventilation openings, seized fan blades
and potential unit failure, DO NOT OPERATE UNIT without
complete enclosure, supply grille, return air grille and filter
in place.
5
1
3
(Optional)
Low Voltage Exit
For Remote Thermostat
(Optional Whip Exit)
2
R
S
6
High Voltage Entry
4
Do not
drive screws
into this area
Service Area
24” Min From
Finished Wall
 WARNING! 
WARNING! To prevent electrical shorts and drain pan leaks,
assure that screws do not penetrate unit components when
driving screws near the unit control box or drain pan. Do not
allow screws or nails to penetrate chassis, risers, electrical
junction boxes, raceways or to interfere with chassis
removal. To avoid motor or compressor damage, keep
wallboard dust out of the unit.
1Supply, Return, and
Condensate Risers }Install Now
2 Cabinet
3 Optional Frame
4 Chassis }Install Later
5 Return Air Panel
6 Supply Air Grille
7 Thermostat (Not shown)
8 Hoses (Not shown)
Figure 1: Vertical Stack Unit Components

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
10 ClimateMaster Water-Source Heating and Cooling Systems
Riser & Cabinet Installation
off the floor while moving cabinet. Look into risers
and remove any debris. From the bottom of the riser,
measure up 2” and mark. See 6B.
3. Raise the cabinet upright, align it and fit 3 risers into
the risers below. The top of each riser is equipped
with a 3" swagged section. Insertion must be 1”
minimum to 2” maximum. Modify risers or use
extensions if needed.
4. Center risers in the slab opening and shim the
cabinet level. Plumb risers in two planes to assure
proper unit operation and condensate drainage.
5. Attach the cabinet assembly to the floor on at least
two sides using sheet metal angles. If risers are
secured to building structure and clamped to cabinet,
mounting angles are not required. A base vibration
dampening pad is recommended to help eliminate
transfer of any vibration to the structure. Material of
0.070 to 0.125 inches thick should be applied to the
perimeter of the cabinet base. Additional anchorage
can be provided by installing brackets at the top of
the cabinet.
6. DO NOT attach drywall studs to cabinet. When all
units on a riser are anchored into place, complete
riser joints as follows:
A. Center the horizontal supply and return runouts
in the expansion slots provided in the back panel
of the cabinet assembly. Assure that runouts are
perpendicular to the back panel.
B. Verify that all riser joints are vertically aligned and
that risers penetrate 1” to 2” into the swaged joint
of the riser below. DO NOT let riser joint bottom
out.
C. Braze riser joints with a high-temperature alloy
(such as Phos-copper or Silfos). Soft solder (50-
50, 60-40 or 85-15) or low-temperature alloys are
NOT suitable for this application.
D. Anchor built-in risers to the building structure
with at least one contact point. To accommodate
vertical expansion and contraction DO NOT
fasten risers rigidly within the unit.
E. Verify that unit shut-off valves are closed. DO
NOT OPEN VALVES until the system has been
cleaned and flushed.
F. Pressure check riser - locate and repair leaks.
G. Check condensate drain - clean pan if needed.
Slowly pour 1 to 2 quarts of water into pan. Water
should drain freely. check for water on floor. Note:
If cabinet is slave, make sure P-Trap Hose is
connected and clamped to master.
H. Repair or replace any damaged or missing
insulation on risers.
I.
To facilitate cleaning and flushing, install the hose
Optional G and H Panel Frame
Position studs in front of cabinet and install frame in
opening. Seal the gap between the cabinet and the
opening. If fresh air motorized damper assembly is used,
field fabricate and install duct from outside to frame
opening. Assembly is installed later. See instructions with
assembly. NOTICE! Allow for wallboard thickness under
frame front flange.
Optional Field Supplied Duct Installation
When return air is required to enter the unit through
openings in a stud wall, supply and field install an
optional duct. Seal duct against the return air grille.
Add a blockoff above and below the chassis to ensure
that all air entering the unit passes through the filter
and refrigerant-to-air coil. Sheet metal ductwork must
not be attached to the cabinet. A canvas type flexible
connection should be used between the cabinet and the
ductwork.
When supply air is ducted from unit, sheet metal
ductwork must not be attached to the cabinet. A canvas-
type flexible connection should be used between the
cabinet and the ductwork.
kit at the end farthest from the pump and connect
the ends of the hoses with the riser flush adapter
(Kit - AFL5751). Then open both valves before
pumping fresh water through the system, close the
valves when the system is clean. Remove the flush
adapter before installing the chassis.
NOTE: Refer to System Flushing Section of this
manual for more information.
J. Install vents in piping loop as required to bleed
the system of air accumulated during installation.
Optional factory installed air vents may be
ordered.
Electrical Connections
Complete all electrical connections prior to enclosing
cabinet. See Electrical Section.
 CAUTION! 
CAUTION! ClimateMaster strongly recommends all piping
connections, both internal and external to the unit, be
pressure tested for leakage by an appropriate method
prior to any finishing of the interior space or before access
to all connections is limited. ClimateMaster will not be
responsible or liable for damages from water leaks due
to inadequate or a lack of pressurized leak testing during
installation.

11
THE SMART SOLUTION FOR ENERGY EFFICIENCY
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climatemaster.com
Riser & Cabinet Installation
Wallboard Installation
NOTICE! If you have the surface mounted thermostat
option, make sure before you install the wallboard that
the 2x4 tile ring is in the correct orientation. Turn if
needed. Check your thermostat.
Install studs and wallboard using conventional
construction methods. Secure drywall to studs with
low profile, pan-head sheet metal screws. Wallboard
must not be fastened to drain pan edges or control box
enclosure. Do not attach drywall studs to cabinet. Do
not install wallboard using adhesive alone.
Vacuum all drywall dust and construction debris from
cabinet insulation coils, drain pans and blower discharge
plenum after cutting out supply and return holes for
grilles. Insulation should be placed between the drywall
and the cabinet for sound attenuation.
When installation is complete, cover all cabinet openings
and exposed sheet metal. (Cardboard from unit shipping
cartons can be used). Do not allow paint or wall texture
over-spray to contact coil, fan or other unit components.
Warranties are void if paint or other foreign debris is
allowed to contaminate internal unit components.
Do not adjust the Sight and Sound X-baffle (see Figure
2). It is not designed to be used as a damper.

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
12 ClimateMaster Water-Source Heating and Cooling Systems
Cabinet Installation
Table 1: Supply Grille Sizes and Arrangements
Figure 2: Cabinet
Supply Grille Installation
Cabinet opening should be sealed to wall. Use
canvas-type flex collar or field supplied duct
extension if needed.
Refer to Table 1 to make sure that the grille size
is correct based on the type and size of the
supply air grille.
• Install the grille into the cabinet discharge
opening. Assure that the grille flange rests
against the drywall covering the cabinet. Do
not caulk.
•
Secure the grille to the drywall with the screws
provided.
Unit Size Single Discharge Double Discharge Triple Discharge
TRM09 12” x 10” 10” x 6” N/A
TRM12 12” x 12” 10” x 6” N/A
TRM15 16” x 12” 14” x 8” 14” x 6”
TRM18 16” x 12” 14” x 8” 14” x 6”
TRM24 N/A 16” x 10” 16” x 6”
TRM30 N/A 16” x 12” 12” x 10”
TRM36 N/A 16” x 14” 16” x 10”
Sight and
Sound Baffle
Condensate Hose
(7/8” I.D.)
Internally trapped
Control Box
Conduit For
Electrical
SIDE VIEW
Wallboard
Flanges Field
Fabricate
Extensions
If Required
Shipping
Brace Riser Clamp -
Top and Bottom
Riser runouts must be
centered in slot. They may have
moved durring shipping.
Loosen clamps and readjust
if needed. Then re-tighten clamps.
Riser
Shutoffs
Riser
Runout
3” Swage
Do not remove
until framing
and wall board
is complete

13
THE SMART SOLUTION FOR ENERGY EFFICIENCY
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climatemaster.com
For correct fit of G Panel:
Drywall (2 layers of 5/8” thick)
attached to front of cabinet
or
1 layer of drywall
and recessed cabinet
Slab
88”
2”
Opening 2¼ x 3¾
for A9155727
or similar 2½”
57½”
6”
16”
17” Slab
2”
Opening 10” x 12”
For Supply Air Grille
A816GASS1210OA,
(cut openings for your grille)
88”
8” Stand
Option
16”
17”
Opening for
“G” Panel
57½”
14”
Whip (Optional)
Cabinet
Fig. 2A
Cabinet
Fig. 2B
Note 2
1¼” 1¼”
Cabinet Installation
Notes:
1. Whip ends with 9 pin molex connector.
2. Field-supplied 2x4 Box must be a type that the side can be removed so molex can be put inside.
3. Special 25, 35 and 45 foot whips and BX armor available.
4. Special 1” to 10” stands available.
5. When stands are used, make sure riser length and position is calculated correctly. 3” above and tailpiece
always from cabinet. Stand raises everything up.
Drywall Openings
for 09SG0P0A1A00DOA
on floor
Drywall Openings
for 09SG0P0A1A00DOA
With 8” Stand and Whip Option
NOTICE - Drywall openings shown below are
for specific cabinets.
Cut openings for your cabinet.

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
14 ClimateMaster Water-Source Heating and Cooling Systems
Cabinet Installation
Outside Wall
Insulation
Field Supplied
Insulated
Ductwork
Field Supplied Grille with
Insect Screen
Field Supply
Flex Duct Collar
or Fabricate Extension.
Seal to Cabinet and Wall.
G or H Panel Frame Motorized Air Damper
Assembled to Frame.
Connect Molex Wire Harness
to Chassis Control Box.
Cut Hole
in Stud
and Seal.
See IOM
with Kit for
Location
and Size.
Drywall
Supply Air
Grille Opening
Fig 2C
TOP VIEW
Cabinet with Frame
and Optional Outside Air
Notes:
1. All units with outside air option must use motorized air damper. Damper to be closed when unit not
operating.
2. Duct can be on right or left side.
3. On all installations, return air must be 50°F (10°C) to 95°F (35°C).
4. On all installations, the ambient temperature behind interior wall must be above freezing.
5. Prevent condensate on all installations of risers and loop piping insulate if required.
1” Min
5½ Max
62½”
A
Slab
Fig 2D: H Panel
Drywall Opening
(with frame)
09-12
15-18
24-36
A
17”
20”
24”
B
16”
19”
23”
6”
57½”
B
Slab
Fig 2E: G Panel
Drywall Opening
(with frame)

15
THE SMART SOLUTION FOR ENERGY EFFICIENCY
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climatemaster.com
CAUTION! Corrosive system water requires corrosion re-
sistant fittings and hoses, and may require water treatment.
Installation of Supply and Return Piping
Follow these piping guidelines.
1. Install a drain valve at the base of each supply and
return riser to facilitate system flushing.
2. Factory standard cabinets have shut-off valves and
hoses have swivel-joint fittings to permit chassis
removal for servicing.
3. Place strainers at the inlet of each system
circulating pump.
4. Select the proper hose length to allow slack between
connection points. Hoses may vary in length by +2%
to -4% under pressure.
5. Refer to Table 2. Do not exceed the minimum bend
radius for the hose selected. Exceeding the minimum
bend radius may cause the hose to collapse, which
reduces water flow rate. Install an angle adapter to
avoid sharp bends in the hose when the radius falls
below the required minimum.
Insulation is not required on loop water piping except
where the piping runs through unheated areas, outside
the building or when the loop water temperature is
below the minimum expected dew point of the pipe
ambient conditions. Insulation is required if loop water
temperature drops below the dew point (insulation is
required for ground loop applications in most climates).
Pipe joint compound is not necessary when Teflon®
thread tape is pre-applied to hose assemblies or when
flared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on
the external pipe threads of the fitting adapters. Prevent
sealant from reaching the flared surfaces of the joint.
Note: When anti-freeze is used in the loop, insure
that it is compatible with the Teflon tape or pipe joint
compound that is applied.
Maximum allowable torque for brass fittings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
finger-tight plus one quarter turn. Tighten steel fittings
as necessary.
Pressure-rated hose assemblies designed specifically for
use with ClimateMaster units should be used. Supply and
return hoses are fitted with swivel-joint fittings at one end
to prevent kinking during installation.
Refer to Figure 3 for an illustration of a typical supply/
return hose kit. Adapters secure hose assemblies to
the unit and risers. Install hose assemblies properly and
check regularly to avoid system failure and reduced
service life.
Table 2: Metal Hose Minimum Bend Radii
Hose Diameter Minimum Bend Radii
1/2" [12.7mm] 2-1/2" [6.4cm]
3/4" [19.1mm] 4" [10.2cm]
1" [25.4mm] 5-1/2" [14cm]
1-1/4" [31.8mm] 6-3/4" [17.1cm]
CAUTION! Do not bend or kink supply lines or hoses.
NOTICE! Do not allow hoses to rest against structural
building components. Compressor vibration may be
transmitted through the hoses to the structure, causing
unnecessary noise complaints.
Figure 3: Supply/Return Hose Kit (AHH Series)
 CAUTION! 
 CAUTION! 
 CAUTION! 
Piping Installation
CAUTION! Piping must comply with all applicable codes.

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
16 ClimateMaster Water-Source Heating and Cooling Systems
Commercial Water Loop Applications
Commercial systems typically include a number of
units connected to a common piping system. Any unit
plumbing maintenance work can introduce air into the
piping system; therefore air elimination equipment is
a major portion of the mechanical room plumbing. In
piping systems expected to utilize water temperatures
below 50°F [10°C], 1/2” (13mm) closed cell insulation is
required on all piping surfaces to eliminate condensation
(extended range units required). Metal to plastic
threaded joints should never be used due to their
tendency to leak over time.
Teflon tape thread sealant is recommended to minimize
internal fouling of the heat exchanger. Do not over
tighten connections and route piping so as not to
interfere with service or maintenance access. Hose
kits are available from ClimateMaster in different
configurations for connection between the unit and the
piping system. Depending upon selection, hose kits
may include shut off valves, P/T plugs for performance
measurement, high pressure stainless steel braided
hose, “Y” type strainer with blow down valve, and/or “J”
type swivel connection. Balancing valves and an external
low pressure drop solenoid valve for use in variable
speed pumping systems may also be included in the
hose kit.
The piping system should be flushed to remove dirt,
piping chips, and other foreign material prior to operation
(see “Piping System Cleaning and Flushing Procedures”
in this manual). The flow rate is usually set between 2.25
and 3.5 gpm per ton [2.9 and 4.5 l/m per kW] of cooling
capacity. ClimateMaster recommends 3 gpm per ton
[3.9 l/m per kW] for most applications of water loop heat
pumps. To insure proper maintenance and servicing,
P/T ports are imperative for temperature and flow
verification, as well as performance checks.
Water loop heat pump (cooling tower/boiler) systems
typically utilize a common loop, maintained between 60 -
90°F [16 - 32°C]. The use of a closed circuit evaporative
cooling tower with a secondary heat exchanger between
the tower and the water loop is recommended. If an
open type cooling tower is used continuously, chemical
treatment and filtering will be necessary.
Ground-Loop Heat Pump Applications
Pre-Installation
Prior to installation, locate and mark all existing
underground utilities, piping, etc. Install loops for new
construction before sidewalks, patios, driveways, and
other construction has begun. During construction,
accurately mark all ground loop piping on the plot plan
as an aid in avoiding potential future damage to the
installation.
Piping Installation
All earth loop piping materials should be limited to
polyethylene fusion only for in-ground sections of the
loop. Galvanized or steel fittings should not be used at
any time due to their tendency to corrode. All plastic to
metal threaded fittings should be avoided due to their
potential to leak in earth coupled applications. A flanged
fitting should be substituted. P/T plugs should be used
so that flow can be measured using the pressure drop of
the unit heat exchanger.
Earth loop temperatures can range between 25 and
110°F [-4 to 43°C]. Flow rates between 2.25 and 3 gpm
per ton [2.41 to 3.23 l/m per kW] of cooling capacity is
recommended in these applications.
CAUTION! The following instructions represent industry
accepted installation practices for closed loop earth
coupled heat pump systems. Instructions are provided
to assist the contractor in installing trouble free ground
loops. These instructions are recommendations only.
State/provincial and local codes MUST be followed and
installation MUST conform to ALL applicable codes. It is the
responsibility of the installing contractor to determine and
comply with ALL applicable codes and regulations.
CAUTION! Ground loop applications require extended range
equipment and optional refrigerant/water circuit insulation.
 CAUTION! 
 CAUTION! 
Water-Loop Heat Pump Applications

17
THE SMART SOLUTION FOR ENERGY EFFICIENCY
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Rev.: Nov. 5, 2009B
climatemaster.com
Test individual horizontal loop circuits before backfilling.
Test vertical U-bends and pond loop assemblies prior to
installation. Pressures of at least 100 psi [689 kPa] should
be used when testing. Do not exceed the pipe pressure
rating. Test entire system when all loops are assembled.
Flushing the Earth Loop
Upon completion of system installation and testing, flush
the system to remove all foreign objects and purge to
remove all air.
Antifreeze
In areas where minimum entering loop temperatures
drop below 40°F [5°C] or where piping will be routed
through areas subject to freezing, antifreeze is required.
Alcohols and glycols are commonly used as antifreeze;
however your local sales manager should be consulted
for the antifreeze best suited to your area. Freeze
protection should be maintained to 15°F [9°C] below
the lowest expected entering loop temperature. For
example, if 30°F [-1°C] is the minimum expected entering
loop temperature, the leaving loop temperature would be
25 to 22°F [-4 to -6°C] and freeze protection should be at
15°F [-10°C]. Calculation is as follows:
30°F - 15°F = 15°F [-1°C - 9°C = -10°C].
All alcohols should be premixed and pumped from
a reservoir outside of the building when possible or
introduced under the water level to prevent fumes.
Calculate the total volume of fluid in the piping system.
Then use the percentage by volume shown in table
3 for the amount of antifreeze needed. Antifreeze
concentration should be checked from a well mixed
sample using a hydrometer to measure specific gravity.
Ground-Loop Heat Pump Applications
Table 3: Antifreeze Percentages by Volume
Type Minimum Temperature for Low Temperature Protection
10°F [-12.2°C] 15°F [-9.4°C] 20°F [-6.7°C] 25°F [-3.9°C]
Methanol
100% USP food grade Propylene Glycol
Ethanol*
25%
38%
29%
21%
25%
25%
16%
22%
20%
10%
15%
14%
* Must not be denatured with any petroleum based product
Low Water Temperature Cutout Setting
CXM or DXM Control
When antifreeze is selected, the FP1 jumper (JW3) should
be clipped to select the low temperature (antifreeze 13°F
[-10.6°C]) set point and avoid nuisance faults (see “Low
Water Temperature Cutout Selection” in this manual). NOTE:
Low water temperature operation requires extended range
equipment.

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
18 ClimateMaster Water-Source Heating and Cooling Systems
Open Loop - Ground Water Systems
Shut off valves should be included for ease of servicing.
Boiler drains or other valves should be “tee’d” into the
lines to allow acid flushing of the heat exchanger. Shut
off valves should be positioned to allow flow through
the coax via the boiler drains without allowing flow into
the piping system. P/T plugs should be used so that
pressure drop and temperature can be measured. Piping
materials should be limited to copper or PVC SCH80.
Note: Due to the pressure and temperature extremes,
PVC SCH40 is not recommended.
Water quantity should be plentiful and of good quality.
Consult Table 4 for water quality guidelines. The unit can
be ordered with either a copper or cupro-nickel water
heat exchanger. Consult Table 4 for recommendations.
Copper is recommended for closed loop systems and
open loop ground water systems that are not high
in mineral content or corrosiveness. In conditions
anticipating heavy scale formation or in brackish water,
a cupro-nickel heat exchanger is recommended. In
ground water situations where scaling could be heavy
or where biological growth such as iron bacteria will
be present, an open loop system is not recommended.
Heat exchanger coils may over time lose heat exchange
capabilities due to build up of mineral deposits. Heat
exchangers must only be serviced by a qualified
technician, as acid and special pumping equipment
is required. Desuperheater coils can likewise become
scaled and possibly plugged. In areas with extremely
hard water, the owner should be informed that the
heat exchanger may require occasional acid flushing.
In some cases, the desuperheater option should not
be recommended due to hard water conditions and
additional maintenance required.
Water Quality Standards
Table 4 should be consulted for water quality
requirements. Scaling potential should be assessed
using the pH/Calcium hardness method. If the pH
<7.5 and the calcium hardness is less than 100 ppm,
scaling potential is low. If this method yields numbers
out of range of those listed, the Ryznar Stability and
Langelier Saturation indecies should be calculated.
Use the appropriate scaling surface temperature for the
application, 150°F [66°C] for direct use (well water/open
loop) and DHW (desuperheater); 90°F [32°F] for indirect
use. A monitoring plan should be implemented in these
probable scaling situations. Other water quality issues
such as iron fouling, corrosion prevention and erosion
and clogging should be referenced in Table 4.
Expansion Tank and Pump
Use a closed, bladder-type expansion tank to minimize
mineral formation due to air exposure. The expansion
tank should be sized to provide at least one minute
continuous run time of the pump using its drawdown
capacity rating to prevent pump short cycling. Discharge
water from the unit is not contaminated in any manner
and can be disposed of in various ways, depending on
local building codes (e.g. recharge well, storm sewer,
drain field, adjacent stream or pond, etc.). Most local
codes forbid the use of sanitary sewer for disposal.
Consult your local building and zoning department to
assure compliance in your area.
Water Control Valve
Always maintain water pressure in the heat exchanger
by placing the water control valve(s) on the discharge
line to prevent mineral precipitation during the off-cycle.
Pilot operated slow closing valves are recommended
to reduce water hammer. If water hammer persists, a
mini-expansion tank can be mounted on the piping
to help absorb the excess hammer shock. Insure that
the total ‘VA’ draw of the valve can be supplied by the
unit transformer. For instance, a slow closing valve can
draw up to 35VA. This can overload smaller 40 or 50
VA transformers depending on the other controls in the
circuit. A typical pilot operated solenoid valve draws
approximately 15VA.
Ground-Water Heat Pump Applications
 CAUTION! 
CAUTION! Many units are installed with a factory or field
supplied manual or electric shut-off valve. DAMAGE WILL
OCCUR if shut-off valve is closed during unit operation. A
high pressure switch must be installed on the heat pump side
of any field provided shut-off valves and connected to the
heat pump controls in series with the built-in refrigerant circuit
high pressure switch to disable compressor operation if water
pressure exceeds pressure switch setting. The field installed
high pressure switch shall have a cut-out pressure of 300
psig and a cut-in pressure of 250 psig. This pressure switch
can be ordered from ClimateMaster with a 1/4” internal flare
connection as part number 39B0005N02.

19
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Vertical Stack
Rev.: Nov. 5, 2009B
climatemaster.com
Flow Regulation
Flow regulation can be accomplished by two methods.
One method of flow regulation involves simply adjusting
the ball valve or water control valve on the discharge
line. Measure the pressure drop through the unit heat
exchanger, and determine flow rate from. Since the
pressure is constantly varying, two pressure gauges may
be needed. Adjust the valve until the desired flow of 1.5
to 2 gpm per ton [2.0 to 2.6 l/m per kW] is achieved. A
second method of flow control requires a flow control
device mounted on the outlet of the water control valve.
The device is typically a brass fitting with an orifice of
rubber or plastic material that is designed to allow a
specified flow rate. On occasion, flow control devices
may produce velocity noise that can be reduced by
applying some back pressure from the ball valve located
on the discharge line. Slightly closing the valve will
spread the pressure drop over both devices, lessening
the velocity noise. NOTE: When EWT is below 50°F
[10°C], 2 gpm per ton (2.6 l/m per kW) is required.
Water Coil Low Temperature Limit Setting
For all open loop systems the 30°F [-1.1°C] FP1 setting
(factory setting-water) should be used to avoid freeze
damage to the unit. See “Low Water Temperature Cutout
Selection” in this manual for details on the low limit
setting.
NOTICE! Ground-water applications for commercial
buildings with more than 2-3 units should include a plate
frame heat-exchanger to isolate the heat pumps from the
ground-water and confine heat exchanger cleanings to one
location and lessen maintenance. Direct use of ground-water
may increase the frequency of heat pump maintenance and
may shorten life expectancy.
Ground-Water Heat Pump Applications

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: Nov. 5, 2009B
20 ClimateMaster Water-Source Heating and Cooling Systems
Table 2: Water Quality Standards
Water Quality Standards
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4VUP[VY[YLH[HZ
ULLKLK 4PUPTPaLZ[LLSWPWLILSV^HUKUVVWLU[HURZ^P[OW/#
/`KYVNLU:\SMPKL/: (SS
 #WWT
([/:%WWTH]VPK\ZLVMJVWWLYHUKJVWWLYUPJRLSWPWPUNVY/?Z
9V[[LULNNZTLSSHWWLHYZH[WWTSL]LS
*VWWLYHSSV`IYVUaLVYIYHZZJHZ[JVTWVULU[ZHYL62[V#WWT
(TTVUPHPVUHZO`KYV_PKLJOSVYPKL
UP[YH[LHUKZ\SMH[LJVTWV\UKZ (SS #WWT
4H_PT\T
4H_PT\T(SSV^HISLH[TH_PT\T^H[LY[LTWLYH[\YL
*OSVYPKL3L]LSZ
-* -* 100¯F (38¯C)
*VWWLY #WWT 59 NR
*\WYV5PJRLS #WWT 59 NR
:: #WWT #WWT <150 ppm
:: #WWT #WWT < 375 ppm
;P[HUP\T %WWT %WWT >375 ppm
,YVZPVUHUK*SVNNPUN
7HY[PJ\SH[L:PaLHUK
,YVZPVU
(SS
#WWTVMWHY[PJSLZ
HUKHTH_PT\T
]LSVJP[`VMMWZBTZD
-PS[LYLKMVYTH_PT\T
TPJYVUBTT
TLZODZPaL
#WWT#WWTZHUKMYLLMVYYLPUQLJ[PVUVMWHY[PJSLZHUKHTH_PT\T
]LSVJP[`VMMWZBTZD-PS[LYLKMVYTH_PT\TTPJYVUBTT
TLZODZPaL(U`WHY[PJ\SH[L[OH[PZUV[YLTV]LKJHUWV[LU[PHSS`
JSVNJVTWVULU[Z
Notes: Rev.: 01/21/09B
s.2Application not recommended.
s.ODESIGN-AXIMUM
s#LOSED2ECIRCULATINGSYSTEMISIDENTIFIEDBYACLOSEDPRESSURIZEDPIPINGSYSTEM
s2ECIRCULATINGOPENWELLSSHOULDOBSERVETHEOPENRECIRCULATINGDESIGNCONSIDERATIONS
(IV]L[OLNP]LUSPTP[ZZJHSPUNPZSPRLS`[VVJJ\Y:JHSPUNPUKL_LZZOV\SKILJHSJ\SH[LK\ZPUN[OLSPTP[ZILSV^
:JHSPUNPUKL_LZZOV\SKILJHSJ\SH[LKH[-B*DMVYKPYLJ[\ZLHUK/>.HWWSPJH[PVUZHUKH[ -B*DMVYPUKPYLJ[/?\ZL
(TVUP[VYPUNWSHUZOV\SKILPTWSLTLU[LK