ClimateMaster VZ Series Assembly instructions

Vertical Series
Water Source Heat Pumps
Installation, Operating &
Maintenance Instructions
VZ Series

Page 2
ClimateMaster works continually to improve its products. As a result, the design and specifications of each product at the time for order may be changed
without notice and may not be as described herein. Please contact ClimateMaster’s Customer Service Department at 1-405-745-6000 for specific information
on the current design and specifications. Statements and other information contained herein are not express warranties and do not form the basis of any
bargain between the parties, but are merely ClimateMaster’s opinion or commendation of its products.
TABLE OF CONTENTS
Page
General Information 3
Inspection 3
Introduction 3
Storage 3
Unit Protection 3
Pre-Inspection 3
VZ Series Units location and Access 4
Installation 5
Installation of Supply and Return Piping 5
Condensate Piping 5
Installing a VZ Series Unit 6
Sound Attenuation for VZ Series Units 6
Electrical Wiring 6
Operating Limits 7
Starting Conditions 7
Closed Loop Earth Coupled Applications 8
Introduction 8
Pre-Installation 8
Horizontal Loop Applications 8
VZ Series Loop Applications 8
Building Entry 9
Loop Testing 10
Flushing and Purging 10
Start-Up Preparation 11
System Checkout 13
Unit Start-Up 14
Maintenance 15

Page 3
Inspection
Upon receipt of shipment at the job site, carefully check
the shipment against the bill of lading. Make sure all units
have been received. Inspect the carton or crating housing
of each VZ Series unit and inspect each unit for damage.
Assure that the carrier makes proper notation of any
shortages or damage on all copies of the freight bill and
that he completes a Carrier Inspection Report. Concealed
damage not discovered during unloading must be reported
to the carrier within 15 days of receipt of shipment.
NOTE: It is the responsibility of the purchaser to file
all necessary claims with the carrier. Notify the
ClimateMaster Traffic Department of all damage within
fifteen (15) days of shipment.
Introduction
This Installation and Operation Manual is for Climate
Master VZ Series Heat Pumps.
Electrical data is provided in the Installation section of
this manual. Refer to project submittal drawings for
specific unit technical data and wiring diagrams.
Storage
CAUTION: DO NOT store or install VZ Series 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
units in an upright position. Tilting units on their sides
may cause equipment damage.
Upon the arrival of equipment at the job site, immedi-
ately store units in their shipping cartons in a clean, dry
are. Store units in an upright position at all times.
Stack VZ Series units up to a maximum of 3 units high.
Do not remove equipment from shipping cartons until
equipment is required for installation.
Unit Protection
Cover VZ Series units on the job site with either shipping
cartons, vinyl film, or an equivalent protective covering.
Cap the open ends of pipes stored on the job site. In areas
where painting, plastering, or the spraying of fireproof
material has not been completed, all due precautions must
be taken to avoid physical damage to the units and
contamination by foreign material. 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 found on
these components.
Pre-Installation
Installation, operation and maintenance instructions are
provided with each unit. Before unit start-up, read all
manuals and become familiar with the unit and its
operation. Thoroughly check out the system before
operation.
Prepare VZ Series units 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. Keep both the chassis and the cabinet covered with
the shipping carton until installation is complete and all
plastering, painting, etc. is finished.
3. Verify that refrigerant tubing is free of kinks or dents,
and that it does not touch other unit components.
4. Inspect all electrical connections. Connections must be
clean and tight at the terminals.
5. Loosen compressor bolts on units equipped with
external spring vibration isolations until the compressor
rides freely on the springs. Remove shipping restraints.
Note: Compressors on all units are internally spring
mounted for quiet operation.
sWARNING
To avoid equipment damage, do not use these units as
a source of heat during the construction process. The
mechanical components and filters used in these units
quickly becomes clogged with construction dirt and
debris which may cause system damage.
To avoid the release of refrigerant into the atmo-
sphere, the refrigerant circuit of this unit must only be
serviced by technicians which meet local, state and
federal proficiency requirements.
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.
When a compressor is removed from this unit, system
refrigerant circuit oil will remain in the compressor.
To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is
removed.
!
GENERALINFORMATION

Page 4
VZ Series Units Location and Access
VZ Series Units are typically installed in a floor level
closet or in a small mechanical room. Refer to Figure 1
for an illustration of a typical installation. Install units
with adequate clearance to allow maintenance and
servicing. Conform to the following guidelines when
selecting unit location.
1. Provide adequate clearance for filter replacement and
drain pan cleaning. Do not block filter access with
piping, conduit or other materials. Refer to Table 1 for
VZ Series Unit Dimensions.
2. Provide access for fan and fan motor maintenance and
for servicing the compressor and coils without removal
of the unit.
3. Provide an unobstructed path to the unit within the
closet or mechanical room to enable removal of the
unit if necessary.
4. Provide access to water valves and fittings, and
screwdriver access to the unit side panels, discharge
collar and all electrical connections.
Table 1 -VZ Series Unit Dimensions
Dimensions in inches (LxWxH)
Unit Size
017, 024 23-1/4 x 23-1/4 x 37-1/2
Note: Dimensions shown above do not include duct collar
Figure 1 - VZ Series Installation
Note: A minimum of 8"
of clearance must be
provided between unit
and remote filter/grille
when no return air duct
is used
System Water in
Condensate
Remote Filter/
Grille (by others)
Note: Adequate
clearance must be
provided on all
sides of unit when
remote filter/grill is
not used
High Pressure Flexible
Hose Kit (Optional)
Controls
Electrical
(By others)
System
Water Out

Page 5
tight plus one quarter turn. Tighten steel fittings as
necessary.
Ensure that the trap is filled with water before operating
the unit to avoid condensate pan overflow at initial start-
up.
WARNING: Do not bend or kink supply lines or
hoses.
Optional pressure-rated hose assemblies designed
specifically for use with ClimateMaster units are avail-
able. Similar hoses can be obtained from alternate
suppliers. Supply and return hoses are fitted with swivel-
joint fittings at one end to prevent kinking during installa-
tion.
Refer to Figure 2 for an illustration of a Supply/Return
Hose Kit. Male adapters secure hose assemblies to the
unit and risers. Install hose assemblies properly and check
them regularly to avoid system failure, reduced service
life and possible damage to surrounding furniture and
carpets.
CAUTION: Corrosive system water requires corro-
sion-resistant fittings and hoses and may require
water treatment.
Condensate Piping
Units are typically installed directly above each other on
successive floors with condensate drains located near the
units.
Connect the unit condensate drain connection to the
building condensate drain with a flexible, non-pressure-
rated 3/4 inch ID plastic hose. Ensure that the hose is
without kinks to maintain an unobstructed flow of
condensate from the unit to the drain.
The horizontal run of a condensate hose is usually too
short to cause drainage problems, however pitch the
horizontal run of the condensate line at least 1 inch for
every 10 feet of run in the direction of flow. Avoid low
points and unpitched piping since dirt collects in low or
level areas and may cause stoppage and overflow.
INSTALLATION
The installation of VZ Series Water Source Heat Pump
units and all associated components, parts and accesso-
ries that make up the installation shall be in accordance
with the regulations of ALL Authorities having jurisdic-
tion and MUST conform to all applicable Code. It is the
responsibility of the Installing Contractor to determine
and comply with ALL applicable Codes and Regulations.
Installation of Supply and Return
Piping
Follow these piping guidelines. WARNING: Piping
must comply with all applicable Codes.
1. Install a drain valve at the base of each supply and
return riser to facilitate system flushing.
2. Install shut-off/balancing valves and unions at each
unit to permit unit 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.
Table 2- Metal Hose Minimum Bend Radii
Minimum Bend Radius
2-1/2
4
5-1/2
6-3/4
Hose in Inches
1/2
3/4
1
1-1/4
This is an extended wide range unit that can operate with
water temperature ranges well below the dew point. All
water piping must be insulated.
Pipe joint compound is not necessary when Teflon
threaded 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
male pipe threads of the fitting adapters. Prevent sealant
from reaching the flared surfaces of the joint.
Anti-free must be used with these units. Assure that the
anti-freeze is compatible with teflon tape and pipe joint
compound used.
Maximum allowable torque for brass fittings is 30 foot-
pounds. If a torque wrench is not available, tighten finger-
Figure 2- Supply/Return Hose Kit
MPT
Rib Crimped MPT
Brass
Fitting
MPT
2 Foot length Standard

Page 6
A= Two power wires on single-phase units: three power wires on three-phase units. B= 1 heat /1 coo l /manual / or Auto Change-over
remote 24V thermostat-4 wires. Note: All customer-supplied wiring to be copper only and must conform to NEC and local electrical
codes. Wiring shown with dashed lines must be field-supplied and field-installed.
Field Installed Wiring
CAUTION
USE COPPER CONDUCTORS ONLY
TO PREVENT EQUIPMENT DAMAGE
WARNING
DISCONNECT ELECTRICAL POWER
SOURCE TO PREVENT INJURY OR
DEATH FROM ELECTRICAL SHOCK
Optional Remote
Room Thermostat
Field Supplied
Disconnect Switch
Heat Pump
A
B
sWarning
A condensate trap is factory installed in each VZ
Series unit. To avoid water damage, DO NOT
installation an external trap.
Installed each unit with its own connection to the
condensate line. Provide a means to flush or blow-out
the condensate drain line.
Install a vent in the condensate line of any application
which may allow dirt or air to collect in the line. Always
vent when the application requires a long, horizontal run,
when some sagging in the condensate line may be
anticipated (as in a long line of plastic pipe) or when
"double trapping" may occur.
Installing a VZ Series Unit
VZ Series units are typically installed on the floor or on
shelves designed to support the weight of the unit. Install
the unit on a piece of rubber or neoprene for sound
isolation. The pad should be 1/2" to 3/8" in thickness.
Extend the pad beyond all four edges of unit.
Sound Attenuation for VZ Series
Units
Sound minimization is achieved by enclosing the unit
within a small mechanical room or a closet. Additional
measures for sound control include the following:
1. Mount the unit so that the return air inlet is 90°to the
return air grille. Refer to Figure 3. Install a sound
baffle as illustrated to reduce line-of-sight sound
transmitted through return air grilles.
2. Mount the unit on a rubber or neoprene isomode pad to
minimize vibration transmission to the building struc-
ture. Extend the pad beyond all four edges of the unit.
ELECTRICAL WIRING
sWARNING
To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and
secure it in an open position during installation.
CAUTION: Use only copper conductors for field
installed electrical wiring. Unit terminals are not
designed to accept other types of conductors.
All field installed wiring, including electrical ground,
must comply with the National Electrical Code as well as
all applicable local codes. In addition, all field wiring
must conform to Class II temperature limitations de-
scribed in the NEC.
Refer to the unit wiring diagrams included with submittal
drawings for fuse sizes and a schematic of the field
Figure 3 - VZ Series Sound Attenuation
!
!
Isolator Pad
Return Air Louver or Grille
Insulated Sound Baffle
(Open bother ends and bottom)

Page 7
connections which must be made by the installing (or
electrical) contractor.
Consult the unit wiring diagram located on the inside of
the compressor access panel to ensure proper electrical
hookup.
Units rated 208-230 volts that have a 24 volt transformer
must have the transformer connection modified if the
actual power supply is 230 volts. Refer to the unit wiring
diagram for details of this procedure.
All final electrical connections must be made with a
length of flexible conduit to minimize vibration and sound
transmission to the building.
For additional wiring information pertinent to units
supplied with a ClimateMaster CMC-2000 Series control
board, refer to the CMC-2000 Series Installation, Opera-
tion and Maintenance Manual (p/n 69626505) supplied
with this unit.
Operating Limits
Environment -This unit is designed for indoor installa-
tion ONLY.
Power Supply - A voltage variation of +/- 10% of
nameplate utilization voltage is acceptable. Three-phase
system imbalance shall not exceed 2%.
Optional Hot Water Generator
When the unit is equipped with an optional hot water
generator it will contain a coaxial tube-in-tube, vented
double-wall heat exchanger.
CAUTION: To avoid equipment damage, do not seal
the vents located at each end of the coaxial coil.
A single blue wire with a wire nut is fastened to the top of
the electrical control box. Two (2) FPT connections are
located on the front of the unit labeled "HWG IN" and
"HWG OUT" which connect to the hot water generator.
Connect the heat exchanger as follows:
1) Plumb the unit to the water tank as described in the
ClimateMaster Geo-Thermal Heat Pump Manual
Volume 3.
2) Fill the system with water.
3) Purge the system of air.
4) Connect the blue wire on the top of the electrical
control box to terminal 5 of the low voltage terminal
block. Activate the circulating pump. The circulating
pump cycles with the compressor when there is a
demand for hot water.
CAUTION: To avoid damage to the circulating pump,
do not connect the wire until plumbing is complete
and the system is purged of air and filled with water.
Starting Conditions
All Models - Units start and operate in an ambient of
40°F with entering air at 40°F with both air and water at
the stated flow rates of ARI Standard 325 rating test for
initial winter start-up.
NOTES
1. These are not normal or continuous operating condi-
tions. This assumes a winter start-up to bring the
building space up to occupancy temperatures.
2. Voltage utilization range complies with ARI Standard
110.
3. When using 100 percent outside air as a source of
ventilation, a 40°F DB minimum and a 78°F WB are
acceptable but the cabinet may sweat during hot
weather.
4. Determination of operating limits is dependent prima-
rily upon 3 factors: 1) return air temperature 2) water
temperature and 3) ambient temperature. When any
one of these factors is at minimum or maximum levels,
the other two factors should be at normal levels to
ensure proper unit operation.
5. Extreme variations in temperature and humidity, and
corrosive water or air adversely affect unit perfor-
mance, reliability and service life.
Air Limits
Min Ambient Air
Rated Ambient Air
Max. Ambient Air
Min. Entering Air
Rated Entering Air db/wb
Max Entering Air db/wb
Water Limits
Min. Entering Water
Normal entering Water
Max Entering Water
All Models
Heating
40°F
70°F
85°F
40°F
70°F
80°F
25°F
70°F
80°F
Cooling
40°F
80°F
100°F
50°F
80/67°F
110/83°F
40°F
85°F
110°F
Table 3 - Operating Limits

Page 8
CLOSED LOOP EARTH COUPLED APPLICATIONS
Introduction
sCAUTION
The following instructions represent industry accepted
installation practices for Closed Loop Earth Coupled
Heat Pump Systems. They are provided to assist the
contractor in installing trouble free ground loops. These
instructions are recommendations only. State and Local
Codes MUST be followed and installations MUST
conform to all applicable Codes. It is the responsibility of
the Installing Contractor to determine and comply with
ALL applicable Codes and Regulations.
Closed Loop Earth Coupled Heat Pump systems are com-
monly installed in one of three configurations: horizontal,
vertical and pond loop. Each configuration provides the
benefit of using the moderate temperature of the earth as a
heat source/heat sink. Piping configurations can be either
series or parallel.
Series piping configurations typically use 1-1/4", 1-1/2" or 2"
pipe. Parallel piping configurations typically use 3/4" or 1"
pipe for loops and 1-1/4", 1-1/2" or 2" pipe for headers and
service lines. Parallel configurations require headers to be
either "closed-coupled" short headers or reverse return design.
Select the installation configuration which provides the most
cost effective method of installation after considering all
application constraints.
Refer to IGSHPA publication Closed Loop/Ground Source
Heat Pump systems Installation Guide (Sections 4-6) for
complete ground loop design, materials requirements and
joining information.
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.
Horizontal Applications
To install Horizontal earth couplings, dig trenches using
either a chain-type trenching machine or a backhoe. Dig
trenches approximately 5 feet apart. Trenches must be at least
5 feet from existing utility lines, foundations and property
lines and at least 10 feet from privies and wells. Trenches may be
curved to avoid obstructions and may be turned around corners.
When multiple pipes are laid in a trench, space pipes properly and
backfill carefully to avoid disturbing the spacing of the pipes in the
trench.
Vertical Applications
To install Vertical earth couplings, drill boreholes using any size
drilling equipment. Regulations which govern water well installations
also apply to vertical ground loop installations. Vertical applications
typically require multiple boreholes. Space boreholes a minimum of
10 feet apart.
Unless other requirements are mandated by code, use the following
guideline when locating boreholes:
•5feetfromfoundationsandlotlines
•10feetfromutilitylinesanddrainfields
•20feetfromnon-publicwells
•50feetfrompublicwells
•100feetfromcesspools,feedlots,lagoons,privies,seepagepits
and septic tanks.
The minimum diameter for 3/4" or 1" U-bend well bores is 4 inches.
Larger diameter boreholes may be drilled if convenient unless local
code requires an expensive method of backfilling. Assemble each U-
bend assembly, fill with water and pressure test prior to insertion into
the borehole.
To add weight and prevent the pipe from curving and digging into
the borehole wall during insertion, tape a length of conduit, pipe or
reinforcing bar to the U-bend end of the assembly. This technique is
particularly useful when inserting the assembly into a borehole filled
with water or drilling mud solutions, since a water filled pipe is
buoyant under these circumstances. Tape the pipes together
approximately every 10 feet to prevent the assembly from separating
under downward pressure and bowing out against the borehole wall.
Carefully backfill the boreholes to within 10 feet of the surface.
Follow IGSHPA specifications for backfilling unless local codes
mandate otherwise.
When all U-bends are installed, dig the header trench 4 to 6 feet deep
and as close to the boreholes as possible. Use a spade to break
through from ground level to the bottom of the trench. At the
bottom of the trench, dig a relief to allow the pipe to bend for
proper access to the header.
!

Page 9
Building Entry
Seal and protect the entry point of the earth coupling into
the building as shown in Figures 4-7 below.
Slab on Grade Construction
New Construction: When possible, position the pipe in the
proper location prior to pouring the slab. To prevent wear
as the pipe expands and contracts, protect the pipe with a
layer of insulation as shown in Figure 4. When the slab is
poured prior to installation, create a chase through the slab
for the service lines with 4" PVC street elbows and
sleeves. Refer to Section 4 of the IGSHPA manual for
details.
Figure 5
Figure 6
Finished Grade
4-6'
Loop Pipe
Insulation Inside
Protective Shield
Finished Grade
4-6'
Loop Pipe
Enter Building As
Soon As Possible
Insulation Inside
Protective Shield
Retrofit Construction: Trench as close as possible to the
footing. Bring the loop pipe up along the outside wall of
the footing until it is higher than the slab. Enter the
building as close to the slab as the construction allows.
Shield and insulate the pipe to protect it from damage and
the elements as shown in Figure 5.
Below Grade Entry
New and Retrofit Construction: Bring the pipe through the
wall as shown in Figure 7. For applications in which loop
temperature may fall below freezing, insulate pipes at least
4 feet into the trench to prevent ice forming near the wall.
Pier and Beam (crawl space)
New and Retrofit Construction: Bury the pipe beneath the
footing and between piers to the point that it is directly
below the point of entry into the building. Bring the pipe
up into the building. Shield and insulate piping as shown
in Figure 6 to protect it from damage.
Insulation
Finished Grade
4-6'
Loop Pipe
Figure 4
4-6 Feet
Masonry
Wall
4" Schedule
40 PVC Pipe
Loop Pipe
4" Compression
Well Seal
Existing Grade
Figure 7

Page 10
Table 4
Approximate Fluid Volume per 100' of Pipe
Loop Testing
Upon completion of the ground loop piping, pressure test
the loop to assure a leak free system.
Parallel systems: Test Parallel systems as each leg is
completed. Test again prior to the connection of the
headers. Test the system for a final time when the entire
loop is assembled and all legs are attached.
Series Systems: Test individual loops as installed. Test
entire system when all loops are assembled.
Horizontal Systems: Test individual loops as installed.
Test entire system when all loops are assembled.
Vertical U-Bends and Pool Loop systems: Test Vertical U-
bends and pond loop assemblies prior to installation with a
test pressure of at least 100 psi. Either water or air may be
used as the testing medium.
Flushing and Purging
Upon completion of system installation and testing, flush
the system to remove all foreign objects and purge to
remove all air. See Table 4 below for approximate fluid
volumes.
Refer to Section 7 of the IGSHPA manual for more
information on flushing and purging Closed Loop Earth
Coupled Systems.
Add antifreeze if necessary. Refer to the IGSHPA manual
for the correct type and amount of antifreeze to add.
sWARNING
Do not use calcium chloride in ClimateMaster units.
The use of calcium chloride voids the equipment
warranty.
Flushing, Purging, Adding Anti-Freeze and
Pressurizing the System
Refer to Closed Loop Earth Coupled Systems Application
Manual (document number 70-MI110-9410) for complete
instructions on flushing, purging, adding anti-freeze and
pressurizing the system.
!

Page 11
proper supply and return the connections to each of the
VZ Series units. Refill the system and bleed off all air.
9. Test the system pH with litmus paper. The system
water should be slightly alkaline ( pH 7.5 to 8.5). Add
chemicals as appropriate to maintain acidity levels.
CAUTION: Do Not use “Stop-Leak” or any similar
chemical agent in this system. Addition of these
chemicals to the loop water can foul the system and
inhibit unit operation.
10. When the system is successfully cleaned, flushed,
refilled and bled, check the main system panels, safety
cutouts, and alarms. Set the controls to properly
maintain loop temperatures.
Internally Mounted Loop Circulating
Pumps and Purging Assembly
To Fill the System: Fill the system prior to flushing and
purging. Refer to Figure 8 and perform the steps de-
scribed below.
1) Connect a water supply hose to valve D. Assure that
the hose is full of water and free of air bubbles.
2) Connect a discharge hose to valve C. Run hose to a
floor drain.
3) Assure that valve B is closed.
4) Assure that valves A, C and D are open.
5) Turn on water supply.
6) Allow system to fill until a steady stream of water
flows from the discharge hose.
7) Turn off supply water.
8) Close valves C and D.
9) Open valve B
10) Remove hoses.
To Flush and Purge the System: To avoid equipment
damage, flush and purge the system on start-up and any
time the water circuit is opened. Use a purging assembly
recommended by the International Ground Source Heat
Pump Association (IGSHPA).
1) Connect the purge pump discharge hose to valve D
2) Connect the return hose to Valve C.
3) Assure that valve B is closed.
4) Assure that valves A, C and D are open.
When the installation is complete and the system is cleaned and flushed, follow the System Checkout procedure outlined below .
START-UPPREPARATION
System Cleaning and Flushing
Cleaning and flushing the unit is the single most impor-
tant step to ensure proper start-up and continued efficient
operation of the system.
Follow the instructions below to properly clean and flush
the system:
sWARNING
To prevent injury or death due to electrical shock or
contact with moving parts, open unit disconnect before
servicing unit.
1. Verify that electrical power to the units is discon-
nected.
2. Install the system with the supply hose connected
directly to the return riser valve. Use a single length of
flexible hose.
3. Open all air vents. Fill the system with water. Do not
allow system to overflow. Bleed all air from the
system. Check the system for leaks and repair appro-
priately.
4. Verify that all strainers are in place. Start the pumps
and systematically check each vent to ensure that all
air is bled from the system.
5. Verify that make-up water is available. Adjusted make-
up water appropriately to replace the air which was
bled from the system. Check and adjust the water/air
level in the expansion tank.
6. Set the boiler to raise the loop temperature to approxi-
mately 85°F. Open a drain at the lowest point in the
system. Adjust the make-up water replacement rate to
equal the rate of bleed.
7. Refill the system and add trisodium phosphate in a
proportion of approximately one pound per 150
gallons of water. Reset the boiler to raise the loop
temperature to about 100°F.
CAUTION: To avoid possible damage to piping
systems constructed of plastic piping, DO NOT allow
loop temperature to exceed 110°F.
Circulate the solution for a minimum of eight to 24
hours. At the end of this period, shut off the circulat-
ing pump and drain the solution. Repeat system
cleaning if desired.
8. When the cleaning process is complete, remove the
short-circuited hoses. Re-connect the hoses to the
!

Page 12
12) Replace valve plugs.
Maintenance: When maintenance of the Heat Pump Water
Circuit, the Building or the in-ground piping loop is
required, close valves A and B to isolate the heat pump
water circuit from the building and in-ground piping.
sWarning
To avoid allowing air into the system which demands
that the system be refilled, flushed and purged, do not
open the heat pump water circuit.
When maintenance requires the removal of the heat pump
or the disconnection of the piping loop from the heat pump
for any length of time, close Valves A and B in the heat
pump and cap the piping loop connections to avoid
contamination of the heat pump water circuit.
Note: A pete's plug is located on the water coil side of the
water pump to assist in checking the system temperature
and/or pressures.
Figure 8: Heat Pump Water Circuit
sWarning
To prevent equipment damage, flush/purge with the
purge pump discharge hose connected to Valve D and
the return hose connected to Valve C. Any other
configuration may force dirt, trash, pipe trimmings or
other foreign materials into the heat pump water
circuit.
5) When hoses are connected, allow the purging container
to fill with water.
6) Start the pump and flush/purge as recommended by
IGSHPA.
7) When filling the system, add water as necessary to
maintain a constant water level in the purging con-
tainer throughout the flush/purge process.
8) When filling, flushing and purging is complete, add
antifreeze (if used) as recommended by IGSHPA
9) When pressurization is complete, close Valves C and
D.
10) Open valve B
11) Disconnect purging assembly hoses
!
!
PURGE/ Fill In
PURGE/ Fill Out
Condensate Drain
H.W.G. In
H.W.G. Out
Water Inlet
Water Outlet
Valve D
Valve B
Valve C
Valve A
Pump
Water Outlet
Water Inlet
Purge/ Fill Out
Purge/ Fill In

Page 13
SYSTEM CHECKOUT
1. Voltage: Ensure that voltage is within the
utilization range specifications of the unit
compressor and fan motor.
2. Wiring: Ensure that fuses, breakers and wire are
sized correctly and that low voltage wiring is
complete.
3. Piping: Ensure that piping is complete and water
system is cleaned and flushed and that all air is
purged from the water piping. Ensure that the
condensate line is open, trapped and correctly
pitched.
4. System Water Temperature: Ensure that it is
within an acceptable range to facilitate start-up.
(When conducting this check, also verify proper
heating and cooling set points.)
5. System Water pH: Verify system water acidity.
(pH = 7.5 or 8.5) Proper pH promotes the
longevity of hoses and heat exchangers.
6. System Flushing: Properly clean and flush
system periodically. Ensure that all supply and
return hoses are connected end-to-end to
facilitate system flushing and prevent fouling of
the heat exchanger by system water.
7. System water: Water used in the system must be
of potable quality and clean of dirt, piping slag,
and chemical cleaning agents.
8. System return air: Ensure that return air tempera-
ture is between 50°-80°F in heating and 60°-95°
F in cooling.
9. Closed-loop Cooling Tower (Open Tower with
Heat Exchanger): Check equipment for proper
temperature set points and operation.
10. Compressor: Ensure that shipping blocks are
removed and that compressor mounting bolts are
loosened to reduce vibration noise.
11. Water Flow: Balance Water Flow Rate to Heat
Pump.
12. Standby Pump: Verify that the standby pump is
properly installed and in operating condition.
13. System Controls: To ensure that no catastrophic
system failures occur, verify that system controls
are functioning and that the sequencing is
correct. If the system uses a CMC-2000 Series
controller, refer to document 04-MI100-9301 for
additional information.
14. Freeze Protection for Water System: Verify that
freeze protection is provided for the outdoor
portion of the loop water system. Inadequate
freeze protection can lead to expensive tower and
system piping repairs.
15. Site Temperature: Do not allow the construction
site to fall below freezing once the system is
installed and tested. Condenser coils never fully
drain by themselves and can freeze unless
winterized with glycol.
16. System Water Loop: Verify that all air is bled
from the system. Air in the system impedes unit
operation and causes corrosion in the system
piping.
17. Unit Filters: To avoid system damage, ensure
that the unit filter is in place and clean.
18. Unit Fans: Manually rotate fans to assure free
rotation. Ensure that fans are properly secured to
the fan shaft. Do not oil fan motors on start-up
since they are lubricated at the factory.
19. System Control Center: To ensure control of the
temperature set-points for operation of the
system’s heat rejector and boiler, examine the
system control and alarm panel for proper
installation and operation.
20. Cabinet: Ensure that all cabinet panels are
properly in place.
21. Miscellaneous: Note any questionable aspects of
the installation.

Page 14
Use the procedure outlined below to initiate proper unit
start-up:
sWARNING
When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise
caution when working with energized equipment.
1. Turn thermostat fan position to "ON". Blower should
start.
2. Balance air flow at registers.
3. Adjust all valves to their full open position. Turn on
the line power to all heat pump units.
4. Operate unit in cooling cycle. Room temperature
should be approximately 70°to 75°F DB, and 61°to
65°F WB. Loop water temperature entering the heat
pumps should be between 70°F and 110°F.
5 Three factors determine the operating limits of a VZ
Series unit- (a) return air temperature, (b) water tempera-
ture, and (c) ambient temperature. When any one of these
factors is at a minimum or maximum level, the other two
factors must be at normal levels to ensure proper unit
operation.
a. Adjust the unit thermostat to the coolest position.
Slowly reduce thermostat setting until the
compressor activates.
b. Check for cool air delivery at the unit grille
within a few minutes after the unit has begun to
operate.
NOTE: Units have a 5 minute time delay in the control
circuit.
c. Verify that the compressor is on and that the
water flow rate is correct by measuring pressure
drop thorough the heat exchanger using the
Pete's plugs and comparing to the heat pump
specification sheet.
d. Check the elevation and cleanliness of the
condensate lines. Dripping may be a sign of a
blocked line. Check that the condensate trap
includes a water seal.
UNIT START-UP
!
e. Refer to Table 7. Check the temperature of both
supply and discharge water. If temperature is
within rage, proceed with test. If temperature is
outside operating range, check cooling refrigerant
pressures.
f. Check air temperature drop across the coil when
both compressors are operating. Air temperature
should drop between 16°F and 20°F.
g. Turn thermostat to "OFF" position. A hissing noise
indicates proper functioning of the reversing
valve.
3. Operate the heat pump in the heating cycle immediately
after checking cooling cycle operation. Allow five (5)
minutes between tests for pressure to equalize.
a. Turn thermostat to lowest setting and set thermo-
stat switch to "HEAT" position.
b. Slowly turn thermostat to a higher temperature
until the compressor activates.
c. Check for warm air delivery at the unit grille
within a few minutes after the unit has begun to
operate.
d. Check the temperature of both supply and
discharge water. Refer to Table 7. If temperature
is within rage, proceed with test. If temperature is
outside operating range, check heating refrigerant
pressures.
e. Check air temperature rise across the coil when
both compressors are operating. Air temperature
should rise between 25°F and 35°F.
f. Check for vibration, noise and mater leaks.
5. If unit fails to operate perform System Checkout (page
14). If the check described fail to reveal the problem
and the unit still does not operate, contact a trained
service technician to ensure proper diagnosis and repair
of the equipment.
6. When testing is complete, set system to maintain desired
comfort level.
Water Flow Rate (GPM) Rise Drop
Closed Loop *
Open Loop**
9°F - 12°F
10°Max
4°F - 8°F
4°F - 8°F
Table 5: Water Temperature Change Through Heat Exchanger
* Earth Coupled or Cooler/Boiler System use 3 GPM/ton
**Flow rate adjusted for temperature

Page 15
UNIT INSPECTION: Visually inspect the unit annually.
Pay special attention to hose assemblies. Repair any leaks
and replace deteriorated hoses immediately.
COMPRESSOR: Conduct an amperage checks on the
compressor annually. Amperage draw should not exceed
normal full load or rated load amps by more than 10
percent of the values noted on the unit nameplate.
Maintain a log of amperage values to detect deterioration
prior to component failure.
sWarning
When replacing the compressor contactor or lockout
relay in a unit with electromechanical controls, use
only ClimateMaster replacement parts. Substitution
other components may result in an inoperative safety
circuit and may cause a hazardous condition.
HEAT EXCHANGERS: Clean heat exchangers annu-
ally. Inspect heat exchangers regularly and clean more
frequently if the unit is located in a “dirty” environment.
Safety Control Reset
All ClimateMaster VZ Series units are furnished with
high and low pressure cutouts to prevent the machine
from operating at abnormal or damaging temperature or
water flow conditions.
The contacts of the high-pressure control used on VZ
Series units are designed to open at 380 psig and auto-
matically close at 300 psig. The contacts of the low-
pressure switch open at 10 psig and close at 32 psig. The
contacts of the low-temperature switch open at 33.5°F
and re-close at 45°F. A lockout relay, electrically linked
with these cutouts, interrupts unit operation. The unit
must be reset manually.
Note: If the unit must be reset more than twice, check the
unit for a dirty filter, abnormal entering water tempera-
ture, inadequate or excessive water flow and internal
malfunction. If the unit continues to cutout, contact a
trained service technician.
Maintenance Procedures
Perform the maintenance procedures outlined below
periodically as indicated.
sWARNING
To prevent injury or death due to electrical shock or
contact with moving parts, open unit disconnect switch
before servicing unit.
FILTERS: Inspect filters. Establish a regular mainte-
nance schedule. Clean filter and maintenance frequently
depending upon need.
To remove the filter from a VZ Series unit, slide the filter
out of its frame located in the return air opening at the
bottom front of the unit. When re-installing the filter, use
the slide-in rails of the filter frame to guide the filter into
the proper position.
CAUTION: To avoid fouled machinery and extensive
unit clean-up, do not operate units without filters in
place. Do not use equipment as a temporary heat
source during construction.
CONDENSATE PANS: Check condensate drain pans
for algae growth every three months. If algae growth is
apparent, consult a water treatment specialist for proper
chemical treatment. The application of an algaecide every
three months typically eliminates algae problems in most
locations.
FAN MOTORS: Lubricate fan motors annually. All
ClimateMaster VZ Series units are fully lubricated at the
factory. Do not oil during installation.
Conduct amperage checks annually. Amperage draw
should not exceed normal full load or rated load amps by
more than 10 percent of the values noted on the unit
nameplate. Maintain a log of amperage values to detect
deterioration prior to component failure.
MAINTENANCE
!
!

ClimateMaster works continually to improve its products. As a result, the design and specifications of each product at the time for order may be changed
without notice and may not be as described herein. Please contact ClimateMaster’s Customer Service Department at 1-405-745-6000 for specific information
on the current design and specifications. Statements and other information contained herein are not express warranties and do not form the basis of any
bargain between the parties, but are merely ClimateMaster’s opinion or commendation of its products.
1-01-IM102 © ClimateMaster 1994 Rev. 5/98
7300 S.W. 44th Street
Oklahoma City, OK 73179
405-745-6000
Fax [phone]
www.climatemaster.com
Part #:69197321