United CoolAir VertiCool CLASSIC Installation, Operation And Maintenance Manual

™

VertiCool

Single Package Vertical Unit (SPVU)

CLASSIC

Installation, Operation and Maintenance Manual

Effective June 2017

Chilled Water and Water Source Heat Pump

Air-Cooled, Water-Cooled,

Contents

Installation, Operation and Maintenance Manual

VertiCool Classic

Important Notice ��4

Use of Symbols ��4

General Information ��5

Inspection Of Equipment ��5

Handling ��5

Mounting And Setting In Place ��5

Unit Vibration Isolation ��6

Location ��6

Clearance ��6

Louver And Ducting ��6

Length of Ductwork for Discharge Air ��7

Application Data ��8

Installation ��8

Air-Cooled Single Package ��8

General Ductwork Recommendations ��9

Plenum Installation ��9

Condensate Drain Connection ��9

Refrigerant Connections ��9

Electrical ��10

Transformer ��11

Wiring ��11

Three Phase Power �� 11

Electric Heat ��11

Voltage Unbalance ��12

Chilled Water Coil Valves Or

Hot Water Coil Valves ��12

Pressure Switches ��12

High Pressure / Low Pressure ��12

Water-Cooled Units ��12

Water Piping and Connections ��13

Chilled Water Sections ��13

System Options ��14

Humidier ��14

Auxiliary Coils (Hot Water or Steam) ��14

Water Side Economizer (Free Cooling Coil) ��14

Air Side Economizer ��14

Split Systems ��15

Evaporator Mounting ��15

Interconnecting Refrigerant Tubing ��15

Condensate Pump ��17

Controls ��18

Thermostat ��18

Microprocessor Controller ��18

Subject to change without notice. 20.10-IM (0617)

Flooded Condenser ��18

Maintenance Procedures��19

Filters ��19

Cleaning The Water-Cooled Condenser��19

Blowers ��19

Blower Motors��19

Blower Speed Adjustment ��20

Blower Bearing Lubrication��20

Belts��20

Refrigerant Systems ��21

Evaporator And Air-Cooled Condenser Coils ��21

Finned Coil Cleaning ��21

Water Side Economizer Coil ��22

Water Valves ��22

Hard Start Kit ��22

Checking Hot Gas Bypass Valve ��22

Adjustment Of Hot Gas Bypass Valve ��22

Sequence Of Operation Cooling - - Air-Cooled ��23

Cooling - - Water-Cooled ��23

Cooling - - Chilled Water ��23

Heating (Other Than Heat Pump) ��23

Heating (Heat Pump, Water Source) ��23

Troubleshooting Guide ��24

Limited Warranty ��27–30

Air-Cooled Unit ��31

Start-Up Procedures (R-410a Systems) ��31

Optional Heating Start Up: ��32

Air-Cooled Unit ��33

Start-Up Procedures ��33

Cooling Mode ��34

Electrical ��34

Heating Mode (Optional) ��34

Water-Cooled Unit ��35

Start-Up Procedures (R-410a Systems) ��35

Optional Heating Start Up: ��36

Water-Cooled Unit ��37

Start-Up Procedures ��37

Cooling Mode ��38

Electrical ��38

Heating Mode (Optional) ��38

Verticool Classic Basic Model Designation��39

LIMITED WARRANTY ��40

FACTORY TESTED ��40

3

Installation, Operation and Maintenance Manual

VertiCool Classic

Important Notice

This manual is the property of the owner.

Please be sure to leave it with the owner when you leave the job.

Use of Symbols

This publication includes warnings, cautions and information icons that point out safety related issues or conditions as well as other pertinent information relative to a safe installation, service or maintenance situation� The following icons should be interpreted as follows:

ELECTRICAL HAZARD

WARNING

CAUTION

INFORMATION

The electrical hazard icon indicates the presence of an electrical hazard which could result in electrical shock or death�

The warning icon indicates a potentially hazardous situation which could result in death or serious bodily injury if not avoided�

The caution icon indicates a potentially hazardous situation which may result in minor or moderate injury if not avoided�

The information icon indicates a situation that may result in equipment or property damage� The information provided alerts the reader to relevant facts and/or conditions�

Subject to change without notice. 20.10-IM (0617)

4

Installation, Operation and Maintenance Manual

General Information

VertiCool Classic

Inspection Of Equipment

Upon receipt of the unit, inspect for visible or concealed interior / exterior damage� Report any damage to the carrier,

and le a damage claim.

Inspect the unit data plate to verify the model unit that was ordered is what has been received�

Some options / accessory items may have been shipped loose in one or more boxes� These may have been delivered to another location, or possibly within the unit� If shipped with

the unit there will be a sticker that identies where in the unit the shipped loose items are located. Conrm that all of

these options / accessory items are also available and that no damage has occurred�

Handling

To facilitate handling, the unit is set on a wooden skid so that it may be picked up with a two-wheel hand truck or fork lift� Under no circumstances should the unit or the skid be “walked” on the corners� Use dolly trucks, pipe rollers or suitable means to move the unit to its proper location�

If a crane, cables or slings are used to move a unit or module, spreader bars must be used to protect each section’s cabinet structure� Some units or modules will be provided with either lifting eyelets or brackets that should be used to lift the sections�

When vertical style units are shipped split, or will be split in

the eld and then reassembled in the space, the condensing

section has refrigerant lines that extend above the top of the cabinet�

When the unit is assembled these ttings are recessed into the evaporator section . These ttings extend approximately

5” for all models (Figure 1)�

The space height needs to be sufcient to handle not only the combined unit height, but also the refrigerant tting

clearance height�

5"

Mounting And Setting In Place

CAUTION

Unit should not be located in space subject to freezing temperatures�

The VertiCool Classic has been designed to be installed as

a single package oor mounted unit.

Unit is to be mounted on a solid oor or supported on a full 100% perimeter frame. Attention must be given to oor

loading limitations� Floor should be level in both horizontal planes�

Before the unit is installed, a thorough study should be made of the structure and proposed installation location� Careful consideration must be given to location of wiring, condensate disposal, ductwork and accessibility for maintenance or service� It is necessary that a minimum clearance of 36” be allowed on the front of the cabinet� Some air path

congurations will also require side access to the evaporator section. Sufcient clearance must be provided to slide the air lter(s) out, either the left or right side.

Consideration must be made for condensate removal, either with a trap or condensate pump�

The units might be shipped as a single package or they might be shipped split� Units that have been ordered with

the optional resealable refrigerant ttings can be split in the eld to accommodate moving into position. Sections are

also bolted together�

When re-assembling the evaporator section to the condensing section, use a sling or other suitable means that

is sufcient to hold the weight of the section. Use spreader

bars to keep the cabinet from being deformed�

Make sure that the evaporator section is positioned correctly for the desired air pattern� Care must be taken when lowering

the evaporator section that the refrigerant resealable ttings

are lined up properly and that they are not damaged in this process� Re-install the fasteners if removed prior�

Figure 1

Subject to change without notice. 20.10-IM (0617)

5

Installation, Operation and Maintenance Manual

VertiCool Classic

Unit Vibration Isolation

When installing any oor mounted unit, it is generally not

necessary to provide any unit vibration isolation� However, some form of vibration isolation may be requested� Please note that the unit frames have not been designed for corner point only loading with vibration isolation methods�

1. If spring mounts are to be used, fabricate a frame to provide support around the entire perimeter of the unit�

Allow sufcient clearance for any door or panel access that is required to provide eld service or maintenance

on the unit� The frame will also need to be designed with suitable cross bracing� (Figure 2)

2. If wafe pad or other similar sound vibration materials

are going to be used, the material needs to be placed under the entirety of the unit base�

Figure 2

Location

Strategically located intake and discharge louvers help to prevent recirculation of discharge and contaminated air

into the intake air stream. Airow around a building and

prevailing wind direction can adversely affect the potential for recirculation and should be factored into louver placement�

In some areas, local codes dictate louver location� Maximize the distance of intake louvers from any exhaust outlet and other contaminants, people, property lines, etc� Avoid placing intakes near idling vehicles�

The bottom of the intake louver should be raised a minimum of 12" from a horizontal surface (roof, sidewalk, etc�) to prevent blockage from debris� If snow accumulations are expected to be greater than 12", raise the bottom of the louver above the average snowfall depth�

If more than one VertiCool unit will be installed in the same area, then the minimum separation of one unit adjacent to another should be 6 feet� A 10 foot separation distance should be maintained where two units are installed one

above the other� It is best to direct discharge air up and away from pedestrian walkways as well�

We do not recommend multiple installations between closely situated buildings where discharge air could collect and be directed back to the intake� Again, recirculation will cause the unit to trip on high head pressure�

Clearance

Clearance of 36" is required on the front side of all units for service and maintenance access�

If a unit has front return, 30" clearance on each side of the unit must be provided for access to the motor and / or refrigerant circuit components, such as the thermostatic expansion valve(s)�

Filters can be accessed from either side of the unit. Sufcient

space must be provided for removal and replacement of all

lters. This can be from one side only or from both sides.

Louver And Ducting

Carefully choosing the right condensing section intake/ exhaust louver(s) and determining the best location for them are critical components to a successful VertiCool installation�

and/or discharge unit openings to allow for optimum velocity and reasonable pressure drop across the louver�

1. Select a louver design that will safely separate the discharge from the intake air stream to ensure that air recirculation will not occur�

2. The intake louver should be designed to minimize and virtually eliminate water penetration at a reasonable face area velocity (fpm)�

3. The discharge duct must be as short and straight as

possible but of sufcient length to guarantee uniform airow distribution through the louver for maximum

velocity�

4. In most cases, the cross-sectional “free area” of the louver must be equal to or larger than the crosssectional areas of the intake and/or discharge unit openings to allow for optimum velocity and reasonable pressure drop across the louver�

5. Ducts should be insulated if the unit is installed and operating in cold climates�

6. Adequate access to both the evaporator and condenser coils as well as the louver must be available for cleaning purposes�

7. All louver manufacturer instructions, local codes, and industry accepted guidelines must be followed for all installations�

Subject to change without notice. 20.10-IM (0617)

6

Installation, Operation and Maintenance Manual

VertiCool Classic

INFORMATION

Discharge air from the condenser air

outlet should be deected away from the

condenser air inlet, to prevent recirculation�

The intake and discharge louver can be in separate frames or combined in one frame�

The combination intake/discharge louver design (Figure 3) offers an advantage over separate louvers because it requires only one wall opening which decreases installation costs�

However, the blades cannot be of uniform conguration (i.e.

the same blade design and angle)� The discharge louver

blades should be angled to direct the airow straight out

horizontally from the unit and the intake blades should be angled down at approximately 45°�

Combination Intake/Discharge

D

“D”

“D” Discharge“I” Intake

“I”

It is also benecial to angle the bottom of the intake ductwork

up from the louver toward the unit opening to minimize the possibility of water carryover reaching the unit and allow for proper drainage Figure 4)�

Figure 4

Discharge Louver

Access panel for condenser coil cleaning�

Inlet Louver

Louvers should be inspected and cleaned on a regular basis� A bird screen is required to deter animals and debris from entering the duct system�

3" Separation Plate

4"

[101�5 mm]

W

Figure 3

It is critical that the two air streams be directed in different directions so that no recirculation of discharge air is allowed to enter the inlet air stream� In some cases it may be necessary

to provide a deector vane or separator between the two air

streams� If recirculation of the discharge air does occur, the unit will likely trip on high head pressure and continue to fail until the louver design is corrected�

Louvers may be manufactured of aluminum (14 gauge) or steel (18 gauge)� Louver widths of 30 inches or more should have additional bracing midway along the blades to maintain proper blade separation� If the louvers are to be installed in a coastal application or any location with environmental concerns, then the louvers should be treated�

Length of Ductwork for Discharge Air

The VertiCool Classic unit should be located a minimum

distance from the louvered wall to maximize efciency of the

blower� Certain conditions and obstructions at the fan inlet and outlet adversely affect fan performance (i�e� elbows, guards, dampers, etc�)� “System Effect” is a term used by the industry to describe these adverse conditions� It is best to design the inlet and discharge ductwork to provide minimum

sufcient straight length of duct to reduce system effect and

allow for uniform air discharge�

Figure 5 below illustrates the discharge air velocity prole at

various distances from the centrifugal blower� It is important to determine the 100% Effective Duct Length to ensure uniform air discharge�

Subject to change without notice. 20.10-IM (0617)

7

Installation, Operation and Maintenance Manual

VertiCool Classic

Based on formulas in ASHRAE Fundamentals – Duct Design, Chapter 34, the following minimum intake and discharge 100% Effective Duct Lengths (EDL) are recommended:

3 thru 5 tons = 3�5 feet 6 & 8 tons = 4 feet 10 thru 15 tons = 5�5 feet

Outlet Area

Blast Area

Cutoff

100% Effective Duct Length

20 tons = 6�5 feet 25 tons = 8 feet 30 & 35 tons = 8�5 feet

25%

50%

75%

Discharge Duct

Figure 5

The VertiCool units are supplied with a standard motor and drive package which provides approximately 0�25” ESP� Upgrades (optional) are available that can raise this capability to 1” ESP or more� The drive packages have some

ability to be adjusted in the eld. You must know the overall

duct design in order to determine what drive package will be required� Normal start-up procedures should be followed including balancing the system following the completed unit installation�

Application Data

Voltage 208 / 230 460 575

Variation 187 / 253 414 / 504 518 / 632

Cooling

(Air Entering Evaporator)

Water-Cooled

DB

(min./max.)

WB

(min./max.)

GPM / Ton

(min./max.)

Leaving Water

(min./max.)

65 / 110

57 / 72

2.5 / 3.5

60 / 115

Installation

The VertiCool Classic units can be shipped as a single package or as a split package which is assembled in the

eld.

Air-Cooled Single Package

1. Move the unit to the desired installation location�

2. Unit contains a full charge of R-410a refrigerant�

3. Install the unit so that controls and access panels are

accessible to the operator and maintenance personnel�

4. Install the condensing section ductwork following the guidelines and industry accepted practices for the condenser air inlet and discharge�

5. Install ductwork on the evaporator as required� If the unit was provided with a discharge plenum having grilles, no ductwork would be required�

6. Install the condensate trap as outlined below�

7. Wire the unit as outlined below�

Air-Cooled Units Shipped Split or Split In The Field For Unit Locating

1. Move the unit to the desired installation location�

2. Unit contains a full charge of R-410a refrigerant�

3. Install the unit so that controls and access panels are

accessible to the operator and maintenance personnel�

4. Install the condensing section ductwork following the guidelines and industry accepted practices for the condenser air inlet and discharge�

5. When re-assembling the evaporator section to the condensing section, use a sling or other suitable means

that is sufcient to hold the weight of the section.

Use spreader bars to keep the cabinet from being deformed�

6. Make sure that the evaporator section is positioned correctly for the desired air pattern� Care must be taken when lowering the evaporator section that the

refrigerant resealable ttings are lined up properly and

that they are not damaged in this process� Re-install the fasteners if removed prior� Systems shipped split from the factory will have the mounting hardware located inside the evaporator section�

7. Install ductwork on the evaporator as required� If the unit was provided with a discharge plenum having grilles, no ductwork would be required�

8. Install the condensate trap as outlined below�

9. Wire the unit as outlined below�

Note: Not all combinations may be valid.

Subject to change without notice. 20.10-IM (0617)

8

Installation, Operation and Maintenance Manual

VertiCool Classic

General Ductwork Recommendations

1. Please make sure that all duct work, evaporator return

and supply air and for air-cooled units the condensing section inlet and discharge air, is connected to the units

using eld supplied exible duct connectors.

2. Make sure that all duct work is supported independently from the equipment�

These two installation requirements are meant to minimize or isolate any unit vibration to help assure that it is not transmitted into the duct work, to the structure and/or out into the space�

All ductwork must be designed in accordance with industry accepted practices� Consult ASHRAE, AMCA or SMACNA guidelines or standards for details� Use of turning vanes is recommended�

Verify that the designed duct external static pressure is in line with the capability of the unit blower / motor provided�

Ducts should be insulated in accordance with applicable industry standards or per local codes, particularly if the unit will be operated during cold weather� The condensing unit intake duct should include a provision to access the inlet side of the coil for periodic cleaning� It is also best to design

for sufcient clearances for servicing the blower motors, expansion valves, lters, and any additional accessories

installed�

This negative pressure can vary from less than 1” up to 2”

column. The condensate trap must be of sufcient depth in water column to permit the condensate to ow from the drain

pan�

The “A” dimension (Figure 6) must equal or exceed the negative static pressure developed by the supply air blower� If it does not, the condensate will not drain properly and

may overow the drain pan. The trap must be at least 2-1/2”

deep to maintain a water seal under all operating conditions, especially during blower start-up�

It is highly recommended that the trap be primed with water prior to unit start-up�

Each trap must be piped to a suitable waste drain�

Unit

“A”

2-1/2"

Figure 6

Plenum Installation

The plenum is typically installed at the factory� However, it may need to be removed to move the unit into position� The plenum is held in position with drive screws�

If the plenum has discharge grilles, the grilles will have to be removed to take the plenum off for re-installation on the evaporator section�

Condensate Drain Connection

Install a eld fabricated condensate trap and drain line or

a condensate pump as required� Route the condensate disposal tubing to a suitable location�

Units are equipped with two 3/4” IPS evaporator drain connections� It is only necessary that one drain connection be utilized� Make sure that the drain connection not being used is plugged�

The drain line must be trapped because the coils are located on the negative side of the blower(s)� The purpose of the condensate trap is to neutralize the negative pressure created within the cabinet by the blower�

Subject to change without notice. 20.10-IM (0617)

Refrigerant Connections

All units are shipped from the factory with a full factory

refrigerant charge. The resealable refrigerant ttings must

be connected and properly tightened to facilitate refrigerant

ow between the evaporator and compressor / condenser

section�

If the unit has been shipped split or has been split to

accomplish installation, the resealable refrigerant ttings

must be connected as follows:

1. On the refrigerant resealable ttings, if not already

accomplished, apply a few drops (5 to 6 droplets are recommended) of refrigerant oil to the male coupling halves before starting the assembly (Ref� to Figure 7)�

2. Align each resealable tting and hand thread the female tting onto the male tting (Ref. to Figure 7).

Continue to hand thread until resistance is observed�

Continued on next page

9

Installation, Operation and Maintenance Manual

VertiCool Classic

3. Once slight resistance is evident, continue to tighten

the ttings using the appropriate size wrenches listed in

Table 1� Please note that it is important to support the

male side of the tting with a wrench when tightening

the female side with a wrench�

4. If the resealable ttings still feel loose, tighten a bit

more as required�

Figure 7

Clockwise Rotation

Female Fitting

Apply oil to male threads Male Fitting

INFORMATION

Count the number of threaded rotations� Use Table 1 to determine how many total rotations are required for proper sealing of

the ttings.

Size Wrench Full Turns Required

3/8" 1-3/16" 6 1/2" 1-3/16" 6 5/8" 1-5/8" 7-3/4 3/4" 1-5/8" 7-3/4 7/8" 1-5/8" 8

1-1/8" 2" 8

Electrical

ELECTRICAL HAZARD

Only a qualied licensed electrician or

other individual that is properly trained in handling live electrical components should perform the wiring installation� Failure to follow all electrical safety precautions and industry accepted practices when exposed to live electrical components could result in death or serious injury�

INFORMATION

Use Copper Conductors Only� Failure to use copper conductors may result in equipment damage�

INFORMATION

All electrical wiring must be in accordance with NEC (National Electrical Code), NFPA (National Fire Protection Agency) most current versions as well as any applicable state or local codes�

INFORMATION

The correct phase sequence of the incoming power supply is a requirement� If the phase sequence is not correct it could cause damage or failure to electrical components� Reverse the incoming wiring to resolve the issue� Do not switch any internal unit wiring�

INFORMATION

If low refrigerant pressure is evident during the start-up process, check the tightness

of all resealable ttings. A tting that is not fully open will restrict refrigerant ow.

Subject to change without notice. 20.10-IM (0617)

Conrm that the incoming power supply

matches the unit data tag�

10

Installation, Operation and Maintenance Manual

VertiCool Classic

INFORMATION

Unit wiring and components have been

designed for the specic unit application

and factory assigned controls� Do not use the unit transformers or alter the unit wiring

to interface any eld supplied accessories

or controls�

A factory provided power block is installed internal to the unit’s electrical control panel� Route the main power wires in accordance with all codes from the disconnect to the unit power block�

A proper ground termination lug has been provided in the unit control panel�

ELECTRICAL HAZARD

Conduit is not an acceptable grounding source� A separate ground conductor must be connected from Earth Ground to the factory supplied grounding lug internal to the unit�

Transformer

Dual voltage units, 208/230, are wired from the factory for the 208 volt power supply� If the power supply will be consistently above 220 volts the transformer should be wired on the 230 volt tap�

Wiring

1. Refer to the wiring diagram that was included with the

unit�

2. Units are completely internally wired at the factory�

3. All units are provided with terminal blocks�

4. Check the unit data tag for the required voltage,

minimum circuit ampacity and maximum fuse size�

5. Route the power wiring through one of the holes provided in the front corner posts�

6. Power wiring must comply with all National or Local codes� The power supply must be suitably fused for wire protection�

7. Use copper conductors only� The unit must be earth grounded using the ground lug provided in the electrical box�

8. Select a location to install the thermostat to avoid vibration, drafts, sun exposure or internal heat sources� Use an inside wall�

9. Route the correct low voltage wire type and size back to the unit and through one of the holes provided in the front corner posts� Connect to the low voltage terminal block per the wiring diagram supplied�

Wire Size1 AWG. Gauge

22 20 19 18 16

40 120 150 190 305

Maximum Wire Length2 Feet

Notes:

1. Soilid, Class II copper wire

2. Based on a voltage drop of 1�2 volts per wire�

3. Total wire length is from unit to room thermostat, and

back to unit�

Three Phase Power

On units with three phase power supply, check for proper blower rotation� If they are running backwards, interchange two of the incoming power leads�

Do not rewire any components inside the unit�

Electric Heat

On larger units having a high amount of electric heat, a second power supply may be required� Run the second power supply to the connections located with the heater� Follow all National Electrical Codes and Local Codes as required� Make sure to run a ground wire to the supplied lug�

Route the low voltage wiring for the heater control to the low voltage terminal block located with the heater�

Subject to change without notice. 20.10-IM (0617)

11

Installation, Operation and Maintenance Manual

VertiCool Classic

Voltage Unbalance

Voltage unbalance occurs when the RMS line voltages on a 3-phase power supply are unequal� Voltages are never balanced between phases, but if the level of the unbalance becomes excessive it will create problems for not only motors but also controls�

The maximum desirable voltage unbalance is 2�0%�

When testing for voltage unbalance, the phase-to-phase voltages should be measured rather than the phase-toneutral voltages since 3-phase motors are connected across phases� Use the following formula to determine the percent of voltage unbalance:

Percent Voltage Unbalance = 100 x (Maximum Voltage Deviation / Average Voltage)

Example:

Phase-Phase voltages

A-B = 479V

B-C = 472V

C-A = 450V

Average Voltage = (479 + 472 + 450) / 3 = 467

Maximum Voltage Deviation from Average =

467 - 450 = 17 (Must always be positive)

Voltage Unbalance = 100 x (17/467) = 3�6%

In this example the percent of voltage unbalance exceeds the desired maximum of 2%� Additional checks should be made

at the unit disconnect to conrm the values. Use accepted

industry practices to check or test the quality of the power supply� Often, it is just a matter of repairing malfunctioning equipment or redistributing loads to improve the unbalance�

If no cause can be located and resolved for the unit power

supply, the building manager or owner should be notied of

the issue to get the proper power supplied to the unit�

It should be noted that the inclusion of a variable frequency drive (VFD) with an unbalanced power supply may result in nuisance tripping and 3rd harmonic currents�

Chilled Water Coil Valves Or Hot Water Coil Valves

Chilled water or hot water valves, if supplied by United CoolAir, are typically 2-way� The optional valves are shipped

loose for installation in the eld. The valves are to be mounted

in the outlet line of the coil�

Pressure Switches

High Pressure

This switch shuts the unit down in the event of excessive high pressure in the discharge line� A manual reset is required at the high pressure switch�

Low Pressure

This switch shuts the unit down in the event of low pressure in the suction line� This switch is auto-reset�

Water-Cooled Units

INFORMATION

Do not reduce the water inlet or outlet connection size as this will restrict water

ow and increase water pressure drop.

CAUTION

Ensure that the water pressure to the unit does not exceed any valve rating�

INFORMATION

All eld installed piping must conform to

applicable local, state and federal laws�

The following items are to be eld supplied and applied:

A. Water shut-off valves (Gate or Ball Type)

B. Inlet water strainer with isolation shut off valves on

each side for periodic cleaning�

The standard condenser heat exchangers are co-axial type� These are tube-in-tube type that are chemically cleanable� The inner tube carries the water and the outer tube the refrigerant� When designing and installing the water piping, some consideration for the chemical cleaning should be made, if desired, for future maintenance�

CAUTION

The condensate drain line should not be connected to the condenser outlet, as

ooding will occur.

Subject to change without notice. 20.10-IM (0617)

12

Installation, Operation and Maintenance Manual

VertiCool Classic

INFORMATION

It is advantageous to record the inlet and water outlet temperatures and the heat exchanger pressure drop during the unit start-up procedure� These are then a valid reference point for maintenance considerations in the future�

INFORMATION

Field supplied water piping must include a pet cock or other suitable means at the highest point to bleed air from the water piping�

INFORMATION

High inlet water temperature or low water

ow rate may result in nuisance tripping of

the refrigerant high pressure switch�

INFORMATION

Water-cooled units with a glycol cooling

uid will require a higher GPM / Ton ow

rate� Contact the factory for details�

WARNING

Water-cooled units have been designed for use with fresh water application only� Do not use for brackish water or salt water unless appropriate condenser and water piping has been applied�

INFORMATION

Units have been tested at the factory

before shipment. The test uid at the

factory contains a glycol mixture� It is

important to ush the internal unit piping

and heat exchangers at the job site prior to

start-up or connection to the cooling uid

circuit being used�

Water Piping and Connections

Both the water inlet and outlet of the condensing section

should be equipped with eld supplied shut off valves. This

is needed for shutdown of water supply during long periods of unit shutdown and/or condenser removal, if required�

If the unit does not have water regulating valves or head

pressure control valves, eld supplied balancing valves may

be required�

INFORMATION

Optional Head Pressure Control Valve(s) should be incorporated into the unit water

circuit(s) if the cooling uid will be less

than 65° F�

Install and connect a fresh water strainer (eld supplied) to

the water inlet line� Strainer should be readily accessible for periodic cleaning� Shut off valves on both strainer inlet and outlet are recommended to facilitate cleaning�

Chilled Water Sections

The chilled water section may be supplied with the lower

section for oor mounting. The chilled water section can also

be supplied as a standalone section�

When being used as a standalone chilled water section, care must be taken to properly support the section if suspended� It is advisable to provide a full perimeter frame to assure that the sheet metal does not buckle�

Provide eld supplied and installed vibration isolation as

required�

Care must be taken when mounting the chilled water section to assure that adequate service clearance is provided for access to the components� Make sure that the access panels can be removed�

The chilled water section will have a control panel� Dependent upon the system components, this control panel may be located internal to the evaporator or externally� Wire high and low voltage to this section as required following National Electrical Codes or Local Codes�

On larger units having a high amount of electric heat, a second power supply is required� Run the second power supply to the connections located with the heater� Follow all National Electrical Codes and Local Codes as required� Make sure to run a ground wire to the supplied lug�

Install the chilled water valve per industry accepted practices�

Subject to change without notice. 20.10-IM (0617)

13

Installation, Operation and Maintenance Manual

VertiCool Classic

System Options

Humidier

The optional steam humidier that comes with the unit functions on the electrode principle. As water lls the plastic

steam generator, it immerses metal electrodes then permits

electrical current ow through the water. This current ow

produces heat which then boils the water into steam� This steam is then injected on the downstream side of the cooling

coil to provide humidication for the area being served by

the unit� Water is replenished through tubing and the 1/4”

are located on the evaporator section structure. For further information refer to the Humidier Installation Instruction

which accompanies the unit�

INFORMATION

The humidier should not be subjected

to freezing air conditions� If the unit will be used for outside air applications an

externally mounted humidier should be

used�

Auxiliary Coils (Hot Water or Steam)

A hot water coil or steam coil when used as heat will be

located in the return air stream between the lters and the

evaporator coil� These are typically installed at the factory�

Some units will include Jack Stands to support the auxiliary

coil / lter box. If the unit is shipped as a single package the

jack stands will be attached� Care should be taken when moving the unit from the skid to the installation location so as not to tear or loosen the jack stand where it is attached to the cabinet�

If the evaporator section is shipped loose the auxiliary coil section will be attached to the evaporator� The jack stands, if required, will be placed inside the auxiliary coil section� The mounting hard- ware will be attached to the jack stand

ange.

If an optional hot water valve is ordered, this will be shipped

loose for installation in the eld.

Control wiring will need to be installed from the hot water valve back to the unit control panel� Follow all National Electrical Codes and Local Codes as required�

Any steam valves and other adjunct steam components are

to be eld supplied and installed by others.

Control wiring will need to be installed from the steam valve back to the unit control panel� Follow all National Electrical Codes and Local Codes as required�

A pan is included under any hot water coil or steam coil� A condensate trap will need to be installed for this drain pan� A trap will need to be installed since this line is in a negative air stream� Follow the same procedures for this line as for the unit condensate drain line outlined on page 6�

Pipe the hot water coil or steam coil per industry accepted practices�

Water Side Economizer (Free Cooling Coil)

A water side economizer coil will be located in the return air

stream between the lters and the evaporator coil. These

are typically installed at the factory�

Some units will include Jack Stands to support the water

side economizer / lter box. If the unit is shipped as a single

package the jack stands will be attached� Care should be taken when moving the unit from the skid to the installation location so as not to tear or loosen the jack stand where it is attached to the cabinet�

If the evaporator section is shipped loose the water side economizer section may or may not be attached to the evaporator� The jack stands, if required, will be placed inside the water side economizer section� The mounting hardware

will be attached to the jack stand ange.

If the unit is shipped as a single package, the water piping from the unit to water side economizer coil will be factory installed�

If the water side economizer is shipped as a separate section or if the unit comes with the evaporator and water side economizer as a section, the water piping will be shipped

loose for eld attachment.

Air Side Economizer

The air side economizer option is installed on the rear of the cabinet�

Some units will include Jack Stands to support the air side

economizer / lter box. If the unit is shipped as a single

package the jack stands will be attached� Care should be taken when moving the unit from the skid to the installation location so as not to tear or loosen the jack stand where it is attached to the cabinet�

If the evaporator section is shipped loose the air side economizer section may or may not be attached to the

Continued on next page

Subject to change without notice. 20.10-IM (0617)

14

Installation, Operation and Maintenance Manual

VertiCool Classic

evaporator� The jack stands, if required, will be placed inside the air side economizer section� The mounting hardware will

be attached to the jack stand ange.

The enthalpy sensors for the return air and the outside air

are shipped loose for eld mounting. Follow the instructions

with each sensor for the proper location and mounting�

Field supplied low voltage wiring must be installed between the two sensors and the terminal blocks located in the unit control panel� Make sure to use the correct type and wire gauge size�

When ducting to the air side economizer, exible duct collars

should be utilized to avoid any transmission of vibration into the duct work�

Split Systems

Systems can be eld modied as a split system option.

Evaporator Mounting

In some situations it is necessary to install the system split� The evaporator section may be supplied with the lower

section for oor mounting. The evaporator can also be

supplied as a standalone section�

When being used as a standalone evaporator section, care must be taken to properly support the section if suspended� It is advisable to provide a full perimeter frame to assure that the sheet metal does not buckle�

Provide eld supplied and installed vibration isolation as

required�

Care must be taken when mounting the evaporator to assure that adequate service clearance is provided for access to the components� Make sure that the access panels can be removed�

The evaporator section will have a control panel� Dependent upon the system components this control panel may be located internal to the evaporator or externally� Wire high and low voltage to this section as required following National Electrical Codes or Local Codes�

INFORMATION

Make sure to use the appropriate gauge of low voltage wire based on the total wire length so that no more than a 1�2 volt drop is experienced�

On larger units having a high amount of electric heat, a second power supply may be required� Run the second

power supply to the connections located with the heater� Follow all National Electrical Codes and Local Codes as required� Make sure to run a ground wire to the supplied lug�

Interconnecting Refrigerant Tubing

After the two system sections have been installed, the eld

supplied interconnecting tubing can be run�

(a) Units 10-ton and smaller are provided as standard without

the resealable ttings. In this situation the sections may

be provided with stubbed copper tubing� Follow industry

accepted practices for brazing the eld supplied tubing to the

unit copper tube stubs�

(b) For units supplied with the resealable refrigerant ttings follow

instructions below�

Units are provided with unique self-sealing ttings (Optional

on 10-ton and smaller, standard on 12-ton and larger) on

the refrigerant lines between the sections. These ttings or

couplings allow the two section unit to be separated and reconnected without loosing the refrigerant charge�

When installed as a split system, an optional interconnect kit is required for each refrigerant circuit or hot gas bypass line�

If the unit was dened as a split system when ordered, the ttings will be male on both sections. The interconnect kit will then consist of the matching female ttings. An interconnect

kit is required for the installer to connect refrigerant lines between both sections� Refrigerant piping between the

sections is eld supplied.

Systems not ordered from the factory to be installed as a

split system, and that contain resealable ttings, will include

Female Fittings on the evaporator section and Male Fittings on the condensing section� An optional Interconnect kit(s) must be ordered indicating that a Male / Female Kit is required�

The interconnect kit also contains four (4) Schrader ttings.

The installer can place at least one in each refrigerant line or at one end of the refrigerant line� These enable the refrigerant line to be evacuated and charged as needed, based on the size and length�

In some situations, the desired refrigerant line size may

differ from the self-sealing tting size provided. The line size should be reduced or enlarged at the self-sealing ttings as

necessary�

INFORMATION

On units with more than one refrigerant circuit, be careful not to intermix liquid, suction and/or hot gas lines of the various circuits�

Subject to change without notice. 20.10-IM (0617)

15

Installation, Operation and Maintenance Manual

VertiCool Classic

1. Temporarily hand thread the female halves of the selfsealing couplings (supplied with the interconnect kit) onto the male couplings, approximately 1 to 1-1/2 turns� This is to make sure that the interconnecting tubing will be routed and brazed with the self-sealing couplings

in their nal proper location, so that there will be no difculty when the nal coupling assembly is made.

2. If there is a hot gas bypass option, connect that coupling the same way�

3. Run the interconnecting tubing required� Always follow accepted industry practices for sizing refrigerant lines based on line length and elevation differences� Disconnect the self-sealing couplings that were temporarily installed in step 1 above�

4. The suction line should be pitched downward to the compressor, sloping approximately 1/4” every ten feet to facilitate oil return�

5. “P” traps (eld supplied) are required for all suction

line risers every 15 feet� When the evaporator is above the condensing section, an inverted “P” trap should be incorporated as close as possible to the evaporator

(this minimizes ood back / oil slugging during the off

cycle)� If the condensing section is more than 40 feet

above the evaporator, consult the factory for specic

refrigerant components�

INFORMATION

On units with more than one circuit, be careful not to intermix liquid, suction, and/ or hot gas lines of the various circuits�

7. Leak check line sets with nitrogen at 500 psig� After brazing the tubing to the self-sealing coupling halves, evacuate each line to 300 microns� Check to make sure that each line holds a vacuum after removal of the vacuum pump (indicating no leaks) (micron level should not go above 500 microns within 10 minutes)� Wipe off coupling seals and threaded surfaces with a clean cloth to prevent the inclusion of dirt or foreign material into the system� Lubricate rubber seal and metal seal in the male halves with refrigeration oil� Thread coupling halves together by hand to insure proper mating of threads� Continue to hand-thread each half-coupling to its mating half until resistance is felt (approximately 1-1/2 to 1-3/4 turns)� Complete the connection of the mating half-couplings with a wrench� If the resealable

ttings still feel loose, tighten a bit more as required.

INFORMATION

Count the number of threaded rotations� Use Table 1 to determine how many total rotations are required for proper sealing of

the ttings.

Size Wrench Full Turns Required

3/8" 1-3/16" 6 1/2" 1-3/16" 6 5/8" 1-5/8" 7-3/4 3/4" 1-5/8" 7-3/4 7/8" 1-5/8" 8

1-1/8" 2" 8

Table 1 - Resealable Fitting Turns

INFORMATION

When brazing tubing to the self-sealing couplings, use a water soaked wet rag, running water bath or chill blocks on the quick-connects to prevent overheating the valves and damaging the seals� Always

apply heat toward the eld installed

refrigerant line� Do not apply heat toward the coupling valve and seal�

6. Install the Schrader valve ttings into the tubing before

brazing the couplings onto the ends of the tubing� Use a 1/4" hole to mount the valve� Clean and debur the tubing before doing any brazing to ensure that no chips or debris are left in the refrigerant circuit� Remove the Schrader valve cap and core before doing any brazing�

Subject to change without notice. 20.10-IM (0617)

INFORMATION

If low refrigerant pressure is evident during the start-up process, check the tightness

of all resealable ttings. A tting that is not fully open will restrict refrigerant ow.

The drawing below illustrates a typical piping arrangement for factory ordered split systems

A - Male self-sealing ttings on unit sections

B - Refrigerant piping between sections (eld-supplied)

C - Female self-sealing ttings in interconnect kit (4)

D - Schrader ttings in interconnect kit (4)

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Installation, Operation and Maintenance Manual

VertiCool Classic

A

Evaporator

Section

A

D

C

D

C

D

B

D

B

C

A

Condensing

Section

A

8. Size refrigerant lines per industry accepted practices�

9. Refrigerant piping shall be insulated in accordance with

local codes and / or applicable ASHRAE Standards� Insulation exposed to weather shall be suitable for outdoor use� Provide protection from water and shielding from solar radiation as necessary�

10. Max. total equivalent line length is 100 feet.

(a)

Max. elevation difference between Evap. And Cond. Is 40 feet.

(a) Contact the factory for installations with elevation

differences greater than 40 feet or total equivalent lengths greater than 100 feet� Alternate line sizes and

specic additional refrigerant circuit components may be

required�

(b) If condensing section is 20 feet or more above the

evaporator an oil separator is to be included for each circuit�

(a) (b)

11. Split must contain refrigerant circuit items as follows:

Equivalent Feet

Oil Separator

Accumulator

Quench Valve

Solenoid Valve

Liquid Line

c. For 5/8” liquid line – add 1�8 oz� per foot

d. For 7/8” liquid line – add 2�4 oz� per foot

Condensate Pump

If an optional condensate pump is to be used, it will be mounted external to the unit�

Follow pump manufacturer instructions�

A 115 volt power supply must be eld supplied for the pump.

INFORMATION

The condensate line out of the unit must be trapped before going into the condensate pump�

Refer to Figure 8 for the termination of the condensate tubing inside the pump�

Refer to Figure 9 for the inverted “U” trap that is to be installed for the condensate line�

Cut tubing at an angle so that bottom of reservoir doesn’t close it� Be sure tubing does not interfere

with oat.

Discharge Line > 100 X

Ext. Hot Gas Bypass Line > 50 X

Liquid Line Net Down >50 X

Suction Line >100 X X X

Suction Line Ambient > 100° F >50 X X

Suction Line Down > 50 X

12. Add the appropriate charge of R-410a Refrigerant using the Schrader valves to compensate for the additional interconnecting tubing as follows:

a. For 3/8” liquid line – add 0�6 oz� per foot

b. For 1/2” liquid line – add 1�2 oz� per foot

Subject to change without notice. 20.10-IM (0617)

Max� Pump Lift

17

Figure 8

To

Drain Inverted “U” Trap

Figure 9

Installation, Operation and Maintenance Manual

VertiCool Classic

Controls

Thermostat

Conrm that the correct thermostat is being applied based

on the number of cooling stages and heating if applicable�

Follow the thermostat manufacturer instructions�

Microprocessor Controller

For units controlled by a microprocessor refer to the specic

instructions for that device�

Flooded Condenser

When the outdoor ambient temperature falls, the condensing pressure falls� This causes the discharge pressure to fall� Since the pressure differential across the thermostatic

expansion valve port affects the rate of refrigerant ow, low discharge pressure generally causes insufcient refrigerant to be fed to the evaporator. Failure to have sufcient head

pressure will result in low suction pressure and/or iced evaporator coils�

The purpose of a ooded condenser is to hold back enough

of the condensed liquid refrigerant so that some of the condenser coil surface is rendered inactive� This reduction of active condensing surface results in a rise in condensing

pressure and sufcient liquid line pressure for normal system

operation�

The effective range for this option is down to –30° F�

A three–way modulating valve and a receiver tank make up

the ooded condenser refrigerant components.

The valve is placed in the liquid line after the condenser coil� The receiver is downstream of the valve� The valve limits

the ow of liquid refrigerant from the condenser while at the same time regulating the ow of discharge gas around the

condenser to the receiver�

During periods of low ambient operation, the receiver pressure falls until it approaches the setting of the control point of the valve (typically 295 psig for R-410a)� The valve

then throttles to restrict the ow of liquid from the condenser.

This raises the condenser pressure� Since it is the receiver pressure that is being maintained, the valve will then start to throttle open the discharge port when the differential between the condensing pressure and the receiver pressure exceeds 20 psi� The hot discharge gas serves to heat up the cold liquid being passed from the condenser to the receiver�

Thus the liquid reaches the receiver warm and with sufcient

pressure to assure proper expansion valve operation�

The receiver is required to hold all the excess/additional liquid refrigerant in the system, since the refrigerant will be returned to the receiver when the high ambient conditions exist�

In the off-cycle the refrigerant can “migrate” to the condenser, during periods of low outdoor ambient� On a call for startup, the evaporator pressure may not build up to the cut-in point of the low pressure control� The result may be a failure of the compressor to start or to short cycle� To eliminate this potential problem, a time delay is added to bypass the low pressure switch during start-up to allow the discharge pressure to build, in turn increasing the suction pressure�

Subject to change without notice. 20.10-IM (0617)

18

Installation, Operation and Maintenance Manual

Maintenance Procedures

VertiCool Classic

ELECTRICAL HAZARD

Turn OFF power and lockout service before conducting any maintenance� Keep hands, clothing and tools clear of electrical terminals�

WARNING

Make sure to keep hands and clothing clear of any moving belts, blowers and motors while performing any maintenance� Failure to do so could result in death or serious bodily injury�

CAUTION

Any maintenance should be conducted

by qualied HVAC service personnel only.

Potentially hazardous situations which may result in personal injury, equipment or property damage�

Filters

Do NOT run unit without lters.

Throwaway lters are supplied which are pleated extended

surface type� Filters should be checked monthly for dirt accumulation and changed when necessary� Replacement

lters must be the same type as originally supplied.

INFORMATION

Unit must be shut off at the disconnect

switch before the lters are serviced. Be sure to check that the air ow direction arrows on the lters point in the correct direction of air ow.

Cleaning The Water-Cooled Condenser

Any uid that is used to carry the heat away through the

condenser contains, minerals, dust from a cooling tower or other foreign materials� Over time these contaminants will build up on the walls of the heat exchanger�

This scale or fouling will result in a reduction in water ow,

less water temperature difference between inlet and outlet,

high condensing temperature and higher uid pressure drop. All of these affect the operating performance and efciency

of the system and need to be addressed�

Cleaning a water-cooled condenser helps to improve the

heat transfer rate, reduce operational cost, restore efciency,

prolong heat exchanger life and reduce pressure drop pumping costs� Deposits from water or water treatments, such as scale, lime, rust or mud are removed�

Each installation is unique. Therefore, the uid quality and

operating conditions will dictate when the heat exchanger needs to be cleaned�

During the start-up process record the water pressure drop across the heat exchanger� Also record the inlet and outlet water temperatures� After a period of time these values can be checked to see how much loss of operating performance has occurred� If a 10% or greater change has occurred, it

would be benecial to clean the heat exchanger.

There are a number of commercially available products for cleaning a heat exchanger� Follow all industry practices to safely and effectively clean the heat exchanger�

Blowers

Disconnect power and lockout the service before doing any service or maintenance�

Air-cooled units are provided with adjustable belt drive blower packages for both the evaporator and condensing sections� Check that the blower wheel is tight on the shaft and does not contact the housing� Bearings are permanently sealed, but should be checked periodically for signs of wear� Check for restrictions or foreign material in the air circuit� The drive may be adjusted for different static pressures� If such an adjustment is made, check that the motor current draw does not exceed the motor nameplate current by more than 10%�

Blower Motors

All blower motors are equipped with thermal overload protectors�

WARNING

Open disconnects to unit before doing any service or maintenance� A motor that is off on thermal overload can start any time when the automatic thermal overload resets�

Subject to change without notice. 20.10-IM (0617)

19

Installation, Operation and Maintenance Manual

VertiCool Classic

Blower Speed Adjustment

Blower speed may be changed by adjusting the variable diameter sheave provided on the blower drive motor� Sheave may be adjusted by removing the belt and loosening

the setscrew located in the hub of the outer ange. With the setscrew loosened, the ange may be turned clockwise

to increase blower speed or counter-clockwise to reduce blower speed�

Typically the motor and drive packages have been sized and

designed for the specic CFM and external static pressure (ESP) of the application. Before making any changes conrm

what the performance was designed for and what the actual performance is�

INFORMATION

Setscrew must be positioned directly

above the at section of the threaded

sheave shaft before tightening to hold adjustment�

INFORMATION

Reduction of airow through excessive

external air friction losses, lowered blower

speed operation with dirty lters, or obstructed air ow may result in excessive

condensation at air outlets, short cycling, or total unit shut- down due to evaporator coil icing�

INFORMATION

Verify that the motor current draw does not exceed the motor nameplate current by more than 10%�

Blower Bearing Lubrication

INFORMATION

Unit must be shut off at the disconnect switch before the blowers are serviced�

Bearings on the smaller units are permanently sealed, but should be checked periodically for signs of wear�

Larger units have pillow block bearings� Bearings will need to be lubricated based on the use of the equipment�

Duty Grease Interval

Low Usage 12 Months

Periodic 6 Months

Continuous 1 – 2 Months

Use a high quality lithium grease for blower pillow block

bearings. Wipe off the “Zerk” tting with a rag before adding

grease so as not to introduce dirt into the bearing�

Slowly rotate the shaft while pumping it in� Pump the grease in slowly so as not to blow out the bearing seal� When the grease starts to “seep” out of the bearing you have put in enough new lubricant�

Over lubricating can cause a bearing to fail from overheating or it can blow out the seal�

Both excessive or inadequate grease may cause premature failure� Provided there is some grease in the bearings for lubrication, under lubrication is better than over lubrication as grease can easily be added but not removed� Always allow a slight bead around the circumference of the seals to

protect the bearing from foreign matter and helps ush out

the bearing as well�

Wipe off the “Zerk” tting with a rag after adding grease

Belts

Excessive belt tension is the number one cause for blower bearing failure� Proper belt tension and pulley alignment are essential for trouble free operation�

Deection is the amount the belt gives when force is applied, usually by nger, to the belt at the approximate center point

to the belt span�

Insufcient deection indicates that the belt tension is

entirely too tight, and if not loosened somewhat, noise due to excessive vibration, premature bearing failure, shortened belt life, and a reduction in supply air blower performance may result� Tight belts may also overload the motor and

cause the efciency to drop considerably or even premature

motor failure as well�

Excessive deection is an indication that the belt is not tight

enough� If not corrected, slippage may occur causing loss of blower speed and belt failure� The belts will glaze then crack or even break due to increased temperatures caused by slippage� Belts may slip during start-up, but slipping should stop as soon as the fan reaches full speed�

If the midpoint (midway between the blower and motor shaft) of the belt is pressed inward, there should be about 1/2” to a

1” of deection when the belt is properly tensioned.

Subject to change without notice. 20.10-IM (0617)

20

Installation, Operation and Maintenance Manual

VertiCool Classic

Refer to Figure 10 – Belt Tensioning below�

Deection Point

Belt Span

Figure 10 – Belt Tensioning

For proper tensioning, an excellent method to use is listed in the following equation�

Deection = Belt Span

64

Belt span is in inches from center pulley to center pulley (see Figure 10)�

Belt tension is adjusted by using the adjusting bolt on the end of the motor mounting frame�

Check the alignment of the sheaves to make sure that the sheave faces are in the same plane� Check this by placing a straight edge across the face of the sheaves� Any gap between the edge and sheave faces indicates misalignment

When the indicator is pink or purple, an abnormal condition exists, servicing is required�

INFORMATION

After installation and during equipment start-up, the sight glass may appear pink or purple� This occurs during prolonged periods of non-operation and should turn blue after several hours (up to 12) of operation�

Evaporator And Air-Cooled Condenser Coils

The nned coils in a unit should be checked at least every

six (6) months or more frequently based on experience of

the specic application.

Evaporator nned coils can become “fouled” due to a build

up of contaminants in the air path that are not caught or

captured in the air lters. Over time this build up on the n

surface can reduce heat transfer and increased resistance

to air ow. The end result might be higher operating costs or

occupant discomfort

A dirty condenser coil will cause high condensing pressures, resulting in higher power consumption and possibly system shut-down by high pressure safety control� A dirty evaporator coil will reduce unit capacity and eventually will cause system shut-down by the low pressure safety control�

Finned Coil Cleaning

Note: This alignment method is only valid when the width of

the surfaces between the belt edges is the same for both sheaves. When they are not equal or when using adjustable pitch pulleys, adjust so that the belts have approximately equal tension. Both shafts should be at right angles to the belt. Check the setscrew and/or bushing bolt tightness.

Belts tend to stretch somewhat after installation� Recheck belt tension after several hours of operation�

Refrigerant Systems

All refrigerant circuits contain a liquid line sight glass� If bubbles appear in the sight glass, the system is either undercharged with refrigerant or there may be a restriction in the liquid line upstream of the sight glass� However, bubbles will appear every now and then in units with the hot gas bypass option� Bubbles will also appear upon compressor start up, but normally clear to pure liquid after a few minutes of operation�

The sight glass contains a moisture indicator which changes color when moisture is present in the refrigerant circuit� This indicator is the circular dot in the center of the sight glass� If the color of this indicator is blue, the refrigerant is okay�

Subject to change without notice. 20.10-IM (0617)

Before cleaning any nned coils, remove the lters. Remove

any large debris or visible dirt accumulation�

WARNING

Make sure to follow all safety precautions when cleaning any coil with a commercially available coil cleaner� Follow all recommendations for safety clothing and gear� Failure to follow all safety instructions could result in death or serious injury�

CAUTION

Clean coils only with cold water and a suitable detergent or a commercially available coil cleaner� DO NOT use hot water or steam to clean a coil containing refrigerant as this may cause a high pressure situation that could damage the coil and associated safety devices or refrigerant components�

21

Installation, Operation and Maintenance Manual

VertiCool Classic

CAUTION

Conrm that any coil cleaning agents,

detergents or solutions are suitable for

use on a copper tube/aluminum n coil. If

the cleaning agent is to acidic or alkaline,

damage to the coil ns may result.

Rinse all coils thoroughly after any coil cleaning�

Use a suitable n comb after the coil cleaning to straighten any bent ns.

Water Side Economizer Coil

If a unit contains the optional water side economizer coil it may also require a periodic cleaning� These coils will need to be cleaned using a chemical solution� These are available commercially� Follow all manufacturer recommendations and safety warnings�

Water Valves

At least once a quarter check the water vales to make sure that no leaks are present� Look at the valve stem and all piping joints�

If any leaks are found follow the manufacturers recommendations for tightening any seals or replacing any gaskets�

Hard Start Kit

A start assist device is utilized on all single phase units� The purpose of this device is to assist the compressor in starting under low voltage conditions�

A capacitor in conjunction with a Positive Temperature

Coefcient (PTC) relay is installed across the run and

start windings of the motor� The PTC device utilizes a ceramic element with a predictable thermal response to the introduction of electric current� When the compressor is called upon to start, the start capacitor provides a voltage boost to the start winding of the motor and causes the motor to turn� As the starting current is introduced across the start windings, the PTC element begins to warm� When the PTC device reaches approximately 250° F (corresponding to 0�6

- 0�8 seconds), the resistance in the element increases and creates an open switch that releases the start winding from the circuit and the motor continues to run� If the compressor does not start before the device heats to 250° F, it will not start until the PTC device cycles through a cool-down period (usually 2 - 3 minutes)� A compressor off-cycle timer is included in the electrical circuit for this purpose�

The time delay also helps the refrigerant system pressures to equalize at the end of the run cycle� This helps the compressor during the starting process in that it is not attempting to start against a high discharge pressure�

INFORMATION

Verify that this timer is set for 3 or more minutes�

Checking Hot Gas Bypass Valve

1. Connect a calibrated thermocouple lead to the outlet

line at the hot gas bypass valve� Tie wrap and insulate the lead�

2. Connect a low pressure refrigerant gauge to the suction line�

3. Connect a high pressure refrigerant gauge to the liquid line�

4. Operate the air conditioner in the cooling mode until the system is stabilized� (Approximately 15 minutes)

5. If the high side pressure is not at or above 400 psig, block off the condenser inlet air stream until the pressure is above this threshold� This will simulate system performance level close to the design condition of 95° F ambient�

6. The hot gas bypass valve setting is 104 psig�

A. If the suction pressure is 104 psig the

thermocouple reading should be approximately 117° F or higher� Please note that it may be necessary to block off some of the evaporator air in order to check this condition�

B. If the suction pressure is above 104 psig the

thermocouple reading should be less than 117° F�

C. If the suction pressure is below 104 psig the hot

gas bypass valve should be adjusted to raise the pressure�

Adjustment Of Hot Gas Bypass Valve

The function of the hot gas bypass valve is to prevent the suction pressure from falling below a predetermined set point, thereby balancing the system� The set point is typically 104 psig (R-410a)�

1. Connect a low pressure refrigerant gauge to the suction line�

2. Operate the air conditioner in the cooling mode until system is stabilized� (Approximately 15 minutes)

3. Remove the seal cap that covers the adjustment screw of the hot gas bypass valve�

4. Adjust the valve by turning the stem� A CLOCKWISE turn will increase the pressure setting� A COUNTERCLOCKWISE turn will decrease the pressure setting� One complete turn is equal to approximately 4 psi change�

Subject to change without notice. 20.10-IM (0617)

22

Installation, Operation and Maintenance Manual

VertiCool Classic

Adjustments should be made in small increments, allowing the system to stabilize after each turn.

5. Vary the evaporator load to test at various conditions

that the suction pressure does not fall below the set point (104 psig for R-410a)�

6. Replace the seal cap on the hot gas bypass valve�

Sequence Of Operation Cooling - - Air-Cooled

The following sequence is based on the unit being controlled by a suitable room thermostat� If another control type is being utilized, reference the instructions for that device�

a. Raise thermostat set point to highest level�

b. Set System switch to “OFF” position�

c. Set Fan switch to the “AUTO” position�

d. Moving the Fan switch to the “ON” position should

cause the evaporator blower motor to run� Moving the Fan switch back to “AUTO” should stop the blower�

e. Move the System switch to the “COOL” position�

Slowly lower the thermostat setting to call for cooling� The evaporator blower should start (assuming the Fan switch is set to “AUTO”) and the System lead compressor should start� The condenser blower on an air-cooled unit should start when the compressor is activated�

f. On those units with multiple compressors, if the

thermostat set point continues to be lowered, the second compressor should then start� Please note that there may be a time delay between stages�

g. Set room thermostat at desired space temperature and

the Fan switch to “AUTO” or “ON”� The unit will cycle as required to maintain conditions�

Cooling - - Water-Cooled

A water-cooled unit sequence will be the same as above, except that air-cooled blower will be replaced by a pump or

valve being activated for water ow through the condenser.

Cooling - - Chilled Water

Chilled water unit sequence is the same as the above, except that the compressor and condenser blower activation is replaced by the chilled water valve function�

Heating (Other Than Heat Pump)

The following sequence is based on the unit being controlled by a suitable room thermostat� If another control type is being utilized, reference the instructions for that device�

a. Lower thermostat set point to lowest level�

b. Set System switch to “OFF” position�

c. Set Fan switch to the “AUTO” position�

d. Moving the Fan switch to the “ON” position should

cause the evaporator blower motor to run� Moving the Fan switch back to “AUTO” should stop the blower�

e. Move the System switch to the “HEAT” position� Slowly

raise the thermostat setting to call for heating� The evaporator blower should start (assuming the Fan switch is set to “AUTO”) and the heat type (electric, hot water or steam) should start�

f. On those units with multiple heat stages, if the

thermostat set point continues to be raised, the additional heat stages should then start� Please note that there may be a time delay between stages�

g. Set room thermostat at desired space temperature and

the Fan switch to “AUTO” or “ON”� The unit will cycle as required to maintain conditions�

Heating (Heat Pump, Water Source)

The following sequence is based on the unit being controlled by a suitable heat pump room thermostat� If another control type is being utilized, reference the instructions for that device�

a. Lower thermostat set point to lowest level�

b. Set System switch to “OFF” position�

c. Set Fan switch to the “AUTO” position�

d. Moving the Fan switch to the “ON” position should

cause the evaporator blower motor to run� Moving the Fan switch back to “AUTO” should stop the blower�

e. Move the System switch to the “HEAT” position�

Slowly raise the thermostat setting to call for heating� The evaporator blower should start (assuming the Fan switch is set to “AUTO”) and the System lead compressor should start� A pump or valve should also

be activated for water ow through the condenser.

f. On those units with multiple compressors, if the

thermostat set point continues to be raised, the additional heat stages should then start� Please note that there may be a time delay between stages�

g. Set room thermostat at desired space temperature and

the Fan switch to “AUTO” or “ON”� The unit will cycle as required to maintain conditions�

Subject to change without notice. 20.10-IM (0617)

23

Installation, Operation and Maintenance Manual

Troubleshooting Guide

VertiCool Classic

ELECTRICAL HAZARD

WARNING

CAUTION

INFORMATION

PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION

Control is

erratic

Blower fails

to start

Compressor

fails to start

Compressor short cycles

1. Control wiring not installed

correctly

2. Loose control connections

3. Broken wiring

1. Controller not set properly

2. Motor failure

3. Defective contactor

4. Overload tripped

5. Controller alarm

6. VFD not functioning properly

1. Controller not set properly

2. Loss of refrigerant charge

3. High head pressure

4. Low line voltage

5. Controller alarm

1. Reduced air ow

2. Loss of refrigerant charge

3. Short cycling of conditioned air

4. Drain pan switch open

Turn OFF power to unit before conducting any troubleshooting, unless the tests you are performing require system operation� Keep hands, clothing and tools clear of electrical terminals�

Make sure to keep hands and clothing clear of any moving belts, blowers and motors while performing any tests� Failure to do so could result in death or serious bodily injury�

Any troubleshooting or test procedures are to be conducted by qualied HVAC

service personnel or electricians only� Potentially hazardous situations which may result in personal injury, equipment or property damage�

For operating and troubleshooting instructions for microprocessor controller,

refer to specic controller instructions that accompany the unit.

1. Check wiring connections against schematic�

2. Check all connections for tightness�

3. Check wire continuity�

1. Turn on and set controller for desired operation

2. Replace motor

3. Replace contactor

4. Check cause and resolve then reset manual overload

(internal overloads will have to reset themselves)

5. Resolve alarm condition

6. Conrm VFD programming and operation

1. Turn on and set controller for desired operation

2. Repair leak, evacuate and recharge refrigerant system

3. Conrm proper uid ow quantity through condenser

4. Conrm acceptable uid temperatures entering the

condenser

5. Resolve incoming voltage issue

6. Resolve alarm condition

[Note: Compressor internal overload may require an extended period of time (1 hour or more) to reset]

1. Check lters and coil for any blockages

2. Replace lters if dirty

3. Repair leak, evacuate and recharge refrigerant system

4. Make sure that supply air is not short cycling back into

return air stream

5. Conrm that unit condensate is draining properly.

Subject to change without notice. 20.10-IM (0617)

24

Installation, Operation and Maintenance Manual

PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION

Evaporator

coil ices

1. Lack of air ow

2. Low return air temperature

3. Loss of refrigerant charge

4. VFD not functioning properly

1. Check lters and coil for any blockages

2. Replace lters if dirty

3. Verify that blower is rotating in the proper direction

4. Make sure that supply air is not short cycling back into return

air stream

5. Repair leak, evacuate and recharge refrigerant system

6. Conrm VFD programming and operation

Noisy

compressor

1. Expansion valve stuck open

2. Worn or scarred compressor

bearings

3. Excessive head pressure

4. Broken compressor valve

(compressor knocking)

5. Liquid slugging

1. Ensure thermal expansion valve bulb is tight on suction line

2. Conrm thermal expansion valve bulb is located properly on

suction line

3. Check superheat

4. Replace compressor

5. Reduce head pressure

6. System overcharged� Reclaim excess refrigerant from the

high side of the system�

System short

of capacity

1. Flash gas in liquid line

2. Expansion valve stuck open or

possibly obstructed

3. Clogged lter drier

4. Iced or clogged evaporator coil

5. Head pressure control valve not

operating properly

6. Condenser needs cleaned

1. Check for refrigerant leaks

2. Repair leak, evacuate and recharge refrigerant system

3. Check sub-cooling

4. Ensure thermal expansion valve bulb is tight on suction line

5. Conrm thermal expansion valve bulb is located properly on

suction line

6. Replace thermal expansion valve

7. Replace lter drier

8. Check lters and coil for any blockages

9. Replace lters if dirty

10. Verify that blower is rotating in the proper direction

11. Conrm proper uid ow quantity through condenser

12. Conrm acceptable uid temperatures entering the condenser

13. Clean condenser

Head

pressure

too high

Head

pressure

too low

1. Possible non-condensable in

system

2. Overcharge of refrigerant

3. Condenser water ow not

adequate

4. Condenser entering uid

temperature too hot

5. Condenser air intake, duct or coil blocked�

6. Condenser blower not operating or running backwards�

1. Condenser water ow too high

2. Entering uid temperature too

low

3. Excessive air ow across

1. Repair leak, evacuate and recharge refrigerant system�

Install new lter drier.

2. Reclaim excess refrigerant from high side of system

3. Conrm proper uid ow quantity through condenser

4. Conrm acceptable uid temperatures entering the condenser

5. Verify that head pressure control valve is operational

6. Reset high pressure safety switch if tripped

7. Clean away debris from condenser air circuit�

8. Check phase of incoming power to unit (3 ph units only)�

Reverse any two incoming power supply wires (except ground)�

1. Conrm proper uid ow quantity through condenser

2. Conrm acceptable uid temperatures entering the condenser

3. Conrm proper air ow amount. Adjust blower drive package

as necessary�

condenser�

VertiCool Classic

Subject to change without notice. 20.10-IM (0617)

25

Installation, Operation and Maintenance Manual

PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION

Suction

pressure

too low

1. Flash gas in liquid line

2. Obstructed expansion valve

3. Loss of uid in expansion valve bulb

4. Clogged lter drier

5. Lack of air ow

6. Entering WB too low

7. Evaporator blower running

backwards

1. Check for refrigerant leak

2. Repair leak, evacuate and recharge refrigerant

system�

3. Replace thermal expansion valve

4. Replace lter drier

5. Check lters and coil for any blockages

6. Verify that blower is rotating in the proper direction

7. Conrm that entering return air conditions fall within

acceptable range

8. Reset low pressure safety switch if necessary

9. Check phase of incoming power to unit (3 ph units only)�

Reverse any two incoming power supply wires (except ground)�

No cooling 1. Controller not set properly

2. Control wiring issue

3. Controls in an alarm condition

4. High or low pressure switch open

5. Compressor thermal overload open

1. Turn on and set controller for desired operation

2. Check wiring connections against schematic�

3. Check all connections for tightness�

4. Check wire continuity�

5. Refer to controller troubleshooting

6. Reset high or low pressure switch

7. Compressor internal overload may require an

extended period of time (1 hour or more) to reset

Condensate

carry over

System short of

capacity in free

cool (water coil)

1. Air ow too high 1. Reduce air ow

2. Conrm VFD programming and operation

1. Check control wiring to the free cool

solenoid valve

1. Check wiring diagram and rewire�

2. Check source of water

2. Low water ow rate

mode

Condensate

pump does

not run

1. Check to see that power to the

pump is present

2. Conrm that oat is moves freely

1. Locate and repair electric issue�

2. Clean oat and sump

3. Conrm that dirt or algae is not

interfering with oat action

Condensate

pump runs

with no

discharge

1. Tubing blocked or kinked

2. Check valve blocked

3. Impeller blocked

4. Tubing elevation or run exceeds

1. Inspect, clean or straighten as necessary�

2. Clean check valve

3. Remove debris from pump impeller

4. Verify tubing run is within pump head limitations�

head capability�

VertiCool Classic

Subject to change without notice. 20.10-IM (0617)

26

Installation, Operation and Maintenance Manual

Limited Warranty

VertiCool Classic

Important Notice!

This Limited Warranty specically provides that all installation,

operation and repairs of product and parts covered under this limited warranty must be made with authorized parts and by a licensed HVAC service provider� The product(s) must be properly installed, and maintained by a licensed HVAC service provider in accordance with the installation, operation, and maintenance instructions provided by United

CoolAir Corporation. Failure to conform to such specications

and/or instructions shall void this limited warranty� United CoolAir may request written documentation showing the proper preventative maintenance�

United CoolAir warrants this product to be free from defects in factory workmanship and material under normal use and service and will, at its option, repair or replace any parts that prove to have such defects within a period of one (1) year from the date of product installation� This warranty extends only to the original consumer purchaser in accordance with the then current Terms and Conditions and is nontransferable�

For this warranty to apply, the product must be installed according to United CoolAir recommendations and

specications, and in accordance with all local, state,

national and provincial codes� The product must not be moved from its original place of installation� The replacement part assumes the unused portion of this warranty�

This limited warranty applies only to products installed in the continental United States, Alaska, Hawaii and Canada�

Exclusions

This Limited Warranty does not cover any:

1. Shipping, labor or material charges�

2. Damages resulting from transportation, installation or

servicing�

3. Damages resulting from accident, abuse, re, ood,

alteration or acts of God�

4. Tampering with, altering, defacing or removing the product serial number will serve to void this warranty�

5. Damages resulting from use of the product in a corrosive atmosphere (such as concentrations of acids or halogenated hydrocarbons)�

6. Damages resulting from inadequacy or interruption of electrical service, improper voltage conditions, blown fuses, or other like circumstances�

7. Cleaning or replacement of lters or belts.

8. Damages resulting from failure to properly and

regularly clean air and/or water side of condenser and evaporator�

9. Damages resulting from: (I) freezing of condenser water or condensate; (II) use of corrosive water; (III)

fouling or restriction of the air/water circuit by foreign material or like causes�

10. Damages resulting from operation with inadequate or interrupted supply of air or water�

11. Damages resulting from use of components or accessories not approved by United CoolAir�

12. This warranty does not apply to the installation, plumbing and wiring not integral to the product�

13. Damages resulting from improper application or sizing of unit�

This warranty is in lieu of all other warranties, expressed or implied, including the implied warranties of merchantability

and tness for a particular purpose.

Some states (provinces) do not allow the disclaimer of implied warranty, so that the above disclaimer may not apply to you�

Some states (provinces) allow only a partial limitation on implied warranties to limit the duration of implied warranties to the duration of the express warranty� In such states (provinces), the duration of implied warranties is hereby expressly limited to the duration of the express warranty on the face hereof�

In no event, whether as a result of breach of warranty or contract, tort (including negligence) strict liability or otherwise, shall United CoolAir be liable for special, incidental, or consequential damages, including but not limited to loss of use of the equipment or associated equipment, lost

revenues or prots, cost of substitute equipment or cost of

fuel or electricity� The above limitations shall inure to the

benet of United CoolAir’s suppliers and subcontractors.

The above limitation on consequential damages shall not apply to injuries to persons in the case of consumer goods�

Some states (provinces) do not allow the exclusion or limitation of liability for consequential damages, or for strict liability in tort, so that the above exclusions and limitations may not apply to you�

United CoolAir does not assume, or authorize any other person to assume for United CoolAir, any other liability for the sale of this product�

This warranty gives you specic legal rights. You may also

have other rights which vary from state to state (province to province)�

To obtain warranty service

Contact the installing or servicing contractor with the details of the problem� Provide the model number, serial number and date of installation� Warranty requests directed to the factory will be referred back through the local distribution network�

Model: ______________ Serial Number: _______________ Date of Installation: ________

Subject to change without notice. 20.10-IM (0617)

27

Installation, Operation and Maintenance Manual

VertiCool Classic

Limited Warranty for Hermetic Compressors

United CoolAir warrants the hermetic compressor in this product to be free from defects in factory workmanship and material under normal use and service and will, at its option, repair or replace the hermetic compressor if it proves to

have such defects within a period of ve (5) years from the

date of product installation� This warranty extends only to the original consumer purchaser in accordance with the then current Terms and Conditions and is non-transferable� If a United CoolAir unit is matched with another manufacturers unit the compressor warranty is limited to 1 year form the date of product installation�

For this warranty to apply, the product must be installed according to United CoolAir recommendations and

specications, and in accordance with all local, state,

national and provincial codes� The product must not be moved from its original place of installation� The replacement part assumes the unused portion of this warranty�

This limited warranty applies only to products installed in the continental United States, Alaska, Hawaii and Canada�

Exclusions

This Limited Warranty does not cover any:

1. Shipping, labor or material charges�

2. Damages resulting from transportation, installation or

servicing�

3. Damages resulting from accident, abuse, re, ood,

alteration or acts of God�

4. Tampering with, altering, defacing or removing the product serial number will serve to void this warranty�

5. Damages resulting from use of the product in a corrosive atmosphere (such as concentrations of acids or halogenated hydrocarbons)�

6. Damages resulting from inadequacy or interruption of electrical service, improper voltage conditions, blown fuses, or other like circumstances�

7. Cleaning or replacement of lters or belts.

8. Damages resulting from failure to properly and

regularly clean air and/or water side of condenser and evaporator�

9. Damages resulting from: (I) freezing of condenser water or condensate; (II) use of corrosive water; (III) fouling or restriction of the air/water circuit by foreign material or like causes�

10. Damages resulting from operation with inadequate or interrupted supply of air or water�

Model: ______________ Serial Number: _______________ Date of Installation: ________

11. Damages resulting from use of components or accessories not approved by United CoolAir�

12. This warranty does not apply to the installation, plumbing and wiring not integral to the product�

13. Damages resulting from improper application or sizing�

This warranty is in lieu of all other warranties, expressed or implied, including the implied warranties of merchantability

and tness for a particular purpose.

Some states (provinces) do not allow the disclaimer of implied warranty, so that the above disclaimer may not apply to you�

Some states (provinces) allow only a partial limitation on implied warranties to limit the duration of implied warranties to the duration of the express warranty� In such states (provinces), the duration of implied warranties is hereby expressly limited to the duration of the express warranty on the face hereof�

In no event, whether as a result of breach of warranty or contract, tort (including negligence) strict liability or otherwise, shall United CoolAir be liable for special, incidental, or consequential damages, including but not limited to loss of use of the equipment or associated equipment, lost

revenues or prots, cost of substitute equipment or cost of

fuel or electricity� The above limitations shall inure to the

benet of United CoolAir’s suppliers and subcontractors.

The above limitation on consequential damages shall not apply to injuries to persons in the case of consumer goods�

Some states (provinces) do not allow the exclusion or limitation of liability for consequential damages, or for strict liability in tort, so that the above exclusions and limitations may not apply to you�

United CoolAir does not assume, or authorize any other person to assume for United CoolAir, any other liability for the sale of this product�

This warranty gives you specic legal rights. You may also

have other rights which vary from state to state (province to province)�

To obtain warranty service

Contact the installing or servicing contractor with the details of the problem� Provide the model number, serial number and date of installation� Warranty requests directed to the factory will be referred back through the local distribution network�

Subject to change without notice. 20.10-IM (0617)

28

Installation, Operation and Maintenance Manual

Limited Warranty Condensing Section

VertiCool Classic

United CoolAir warrants this product to be free from defects in factory workmanship and material under normal use and service and will, at its option, repair or replace any parts that prove to have such defects within a period of one (1) year from the date of product installation, to begin no later than six (6) months after product shipment from the factory� This warranty extends only to the original consumer purchaser in accordance with the then current Terms and Conditions and is non-transferable�

For this warranty to apply, the product must be installed according to United CoolAir recommendations and

specications, and in accordance with all local, state,

national and provincial codes� The product must not be moved from its original place of installation� The replacement part assumes the unused portion of this warranty�

This limited warranty applies only to products installed in the continental United States, Alaska, Hawaii, Puerto Rico and Canada�

EXCLUSIONS

This Limited Warranty does not cover any:

1. Shipping, labor or material charges�

2. Damages resulting from transportation, installation or

servicing�

3. Damages resulting from accident, abuse, re, ood,

alteration or acts of God�

4. Tampering with, altering, defacing or removing the product serial number will serve to void this warranty�

5. Damages resulting from use of the product in a corrosive atmosphere (such as concentrations of acids or halogenated hydrocarbons)�

6. Damages resulting from inadequacy or interruption of electrical service, improper voltage conditions, blown fuses, or other like circumstances�

7. Cleaning or replacement of lters or belts.

8. Damages resulting from failure to properly and

regularly clean air and/or water side of condenser and evaporator�

9. Damages resulting from: (I) freezing of condenser water or condensate; (II) use of corrosive water; (III) fouling or restriction of the air/water circuit by foreign material or like causes�

10. Damages resulting from operation with inadequate or interrupted supply of air or water�

11. Damages resulting from use of components or accessories not approved by United CoolAir�

12. This warranty does not apply to the installation,

plumbing and wiring not integral to the product�

13. Damages resulting from improper application or sizing of unit�

14. In the event that the refrigerant type is changed, as a result of a compressor failure and the same type of compressor is not available, any subsequent refrigerant circuit component failures will not be covered under the Limited Warranty�

This warranty is in lieu of all other warranties, expressed or implied, including the implied warranties of merchantability

and tness for a particular purpose.

Some states (provinces) do not allow the disclaimer of implied warranty, so that the above disclaimer may not apply to you�

Some states (provinces) allow only a partial limitation on implied warranties to limit the duration of implied warranties to the duration of the express warranty� In such states (provinces), the duration of implied warranties is hereby expressly limited to the duration of the express warranty on the face hereof�

In no event, whether as a result of breach of warranty or contract, tort (including negligence) strict liability or otherwise, shall United CoolAir be liable for special, incidental, or consequential damages, including but not limited to loss of use of the equipment or associated equipment, lost

revenues or prots, cost of substitute equipment or cost of

fuel or electricity� The above limitations shall inure to the

benet of United CoolAir’s suppliers and subcontractors.

The above limitation on consequential damages shall not apply to injuries to persons in the case of consumer goods�

Some states (provinces) do not allow the exclusion or limitation of liability for consequential damages, or for strict liability in tort, so that the above exclusions and limitations may not apply to you�

United CoolAir does not assume, or authorize any other person to assume for United CoolAir, any other liability for the sale of this product�

This warranty gives you specic legal rights. You may also

have other rights which vary from state to state (province to province)�

To obtain warranty service

Contact the installing or servicing contractor with the details of the problem� Provide the model number, serial number and date of installation� Warranty requests directed to the factory will be referred back through the local distribution network�

Continued on Next Page

Model: ______________ Serial Number: _______________ Date of Installation: ________

Subject to change without notice. 20.10-IM (0617)

29

Installation, Operation and Maintenance Manual

VertiCool Classic

Limited Warranty for Hermetic Compressors

United CoolAir warrants the hermetic compressor in this product to be free from defects in factory workmanship and material under normal use and service and will, at its option, repair or replace the hermetic compressor if it proves to have such defects within a period of one (1) year from the date of product installation, to begin no later than six (6) months after product shipment from the factory� This warranty extends only to the original consumer purchaser in accordance with the then current Terms and Conditions and is non-transferable�

For this warranty to apply, the product must be installed according to United CoolAir recommendations and

specications, and in accordance with all local, state, national

and provincial codes� The product must not be moved from its original place of installation� A second compressor failure in the same refrigerant circuit is indicative of an application issue and will not be covered under the Limited Warranty�

This limited warranty applies only to products installed in the continental United States, Alaska, Hawaii, Puerto Rico and Canada�

EXCLUSIONS

This Limited Warranty does not cover:

1. Shipping, labor or material charges�

2. Damages resulting from transportation, installation or

servicing�

3. Damages resulting from accident, abuse, re, ood,

alteration or acts of God�

4. Tampering with, altering, defacing or removing the product serial number will serve to void this warranty�

5. Damages resulting from use of the product in a corrosive atmosphere (such as concentrations of acids or halogenated hydrocarbons)�

6. Damages resulting from inadequacy or interruption of electrical service, improper voltage conditions, blown fuses, or other like circumstances�

7. Cleaning or replacement of lters or belts.

8. Damages resulting from failure to properly and

regularly clean air and/or water side of condenser and evaporator�

9. Damages resulting from: (I) freezing of condenser water or condensate; (II) use of corrosive water; (III) fouling or restriction of the air/water circuit by foreign material or like causes�

10. Damages resulting from operation with inadequate or interrupted supply of air or water�

11. Damages resulting from use of components or accessories not approved by United CoolAir�

Model: ______________ Serial Number: _______________ Date of Installation: ________

12. This warranty does not apply to the installation, plumbing and wiring not integral to the product�

13. Damages resulting from improper application or sizing�

14. Discharge air temperature control, if not provided by

the factory, will void the compressor Limited Warranty�

15. In the event that the refrigerant type is changed, as a result of a compressor failure and the same type of compressor is not available, any subsequent compressor failures will not be covered under the Limited Warranty�

This warranty is in lieu of all other warranties, expressed or implied, including the implied warranties of merchantability

and tness for a particular purpose.

Some states (provinces) do not allow the disclaimer of implied warranty, so that the above disclaimer may not apply to you�

Some states (provinces) allow only a partial limitation on implied warranties to limit the duration of implied warranties to the duration of the express warranty� In such states (provinces), the duration of implied warranties is hereby expressly limited to the duration of the express warranty on the face hereof�

In no event, whether as a result of breach of warranty or contract, tort (including negligence) strict liability or otherwise, shall United CoolAir be liable for special, incidental, or consequential damages, including but not limited to loss of use of the equipment or associated equipment, lost

revenues or prots, cost of substitute equipment or cost of

fuel or electricity� The above limitations shall inure to the

benet of United CoolAir’s suppliers and subcontractors.

The above limitation on consequential damages shall not apply to injuries to persons in the case of consumer goods�

Some states (provinces) do not allow the exclusion or limitation of liability for consequential damages, or for strict liability in tort, so that the above exclusions and limitations may not apply to you�

United CoolAir does not assume, or authorize any other person to assume for United CoolAir, any other liability for the sale of this product�

This warranty gives you specic legal rights. You may also

have other rights which vary from state to state(province to province)�

To obtain warranty service

Contact the installing or servicing contractor with the details of the problem� Provide the model number, serial number and date of installation� Warranty requests directed to the factory will be referred back through the local distribution network�

Subject to change without notice. 20.10-IM (0617)

30

Air-Cooled Unit

Start-Up Procedures (R-410a Systems)

Some of the numbered items below are referenced on the Start Up Form that needs to be completed�

This procedure has been created based on utilizing a standard wall thermostat� If another controller is being utilized some of the steps below may need to be altered�

1. Start up must be performed by a qualied HVAC

Technician�

2. Make certain that all power is disconnected at the main power circuit breaker or service disconnect before starting any of this procedure�

3. Check all electrical screw terminals and wiring lugs for tightness internal to the equipment� Components may have loosened due to vibration during transit or handling� Verify that the main power block lug

connections made in the eld are tight and secure.

4. Conrm that the voltage rating of the equipment data

tag coincides with the power that will be delivered to the unit�

5. Verify that the circuit protection for the unit satises

Local and National Codes according to the unit data tag Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS)�

6. Locate the unit thermostat and check all electrical terminations against the unit electrical diagram and for the unit thermostat�

Note: If using a digital thermostat with a “C” (Common)

terminal, this terminal MUST be terminated to the “C” terminal in the unit. Failure to do so will result in the thermostat shorting out and being destroyed.

7. Leak check the refrigerant system� While the unit was

leak checked at the factory, leaks can develop during transit and / or handling�

8. Conrm that the unit condensate has been adequately

trapped and taken to a suitable point for disposal�

9. Verify that the lters are in place, clean and usable.

10. Switch the unit thermostat to the “OFF” position�

11. Apply power to the unit� Switch the circuit breaker or

eld supplied electrical service disconnect switch to the

on position�

Note: If the unit has the ooded condenser option the scroll

compressors will have crankcase heaters. If the

outdoor ambient is 70˚ F or lower, let the compressors

sit for approximately 24 hours before proceeding.

Installation, Operation and Maintenance Manual

VertiCool Classic

12. Record the voltage at the unit terminals�

13. If possible with the thermostat provided, switch the

evaporator blower to the RUN position� Verify that the evaporator blower is activated�

14. Verify that the evaporator blower is rotating in the correct direction (three phase units only)�

Note: If the evaporator blower motor runs backwards,

shut off all power to the unit. Switch any two of the incoming power leads at the unit terminal block. The unit has been wired and phased properly at the factory. DO NOT change any factory wiring to correct for a phase problem.

Note: Before conducting the following start up sections

connect a suitable refrigerant gauge set to the unit Schrader connections. Install temperature sensors to record the appropriate refrigerant line temperatures. Service gauge access ports have been provided in the cabinet corner posts so that the gauge line hoses can be run outside the cabinet with the access panels installed.

15. Set the thermostat switch to a temperature set point

approximately 5˚ lower than the space temperature. Set

the thermostat fan switch to the AUTO position� Set the thermostat operating mode to the COOL position� This should energize the compressor(s) and both blowers�

Note: Dependent upon the options and/or the thermostat,

there may be a delay for the compressor(s) operation.

16. Verify that the condenser blower rotation is correct�

17. While waiting for the compressor(s) to stabilize,

record the External Static Pressure (ESP) for both the evaporator and condenser blowers�

Note: Make sure all the unit access panels are in place when

taking these readings.

18. Record the return air temperature to the evaporator coil

along with the supply air temperature� (The unit should have operated for at least 15 minutes before taking these readings)�

19. Record the outdoor ambient entering the condenser coil along with the discharge air temperature of the condensing section�

20. Record the suction line pressure and the suction line temperature for each circuit near the compressor�

Continued on next page

Subject to change without notice. 20.10-IM (0617)

31

Start-Up Procedures (R-410a Systems) Continued:

21. Using an appropriate pressure / temperature chart for

R-410a refrigerant, look up and record the saturation temperature corresponding to the suction pressure�

22. Calculate and record the suction superheat for each circuit by taking the difference between the suction line temperature and the saturation temperature corresponding to the suction pressure�

23. Record the liquid line pressure and the liquid line temperature for each circuit near the condenser coil outlet�

24. Using an appropriate pressure / temperature chart for R-410a refrigerant, look up and record the saturation temperature corresponding to the liquid line pressure�

25. Calculate and record the liquid sub-cooling for each circuit by taking the difference between the liquid line temperature and the saturation temperature corresponding to the liquid line pressure�

26. Record the Amps for the evaporator blower motor, each compressor and the condenser blower motor� If the system is single phase, use L1 and L2 only�

a. Make sure the pressures on each compressor circuit

are within the proper limits:

i. 290 – 550 Discharge

ii. 100 – 140 psig Suction

b. Compressor Amperage is below the RLA Amps

listed on the unit data tag�

i. The maximum compressor operating current

(amps) at start up depends a lot on the system loading� The lower the load, the less the current� The higher the load, the higher the current�

c. The blower motor FLA values should never be

exceeded�

i. If the FLA value is exceeded, shut the unit off

27. Document any additional information deemed

appropriate for the specic application or installation.

28. Shut the system down and remove all test instruments and test sensors�

29. Leave the system in the operating mode as appropriate for the customer and the application�

Optional Heating Start Up:

30. If the system has any optional heat, set the room

thermostat approximately 5° higher than the actual room temperature� Set the controller operating mode to the HEAT position�

31. Dependent upon the heating source the heating valve or switch / contactor should be activated�

32. After several minutes of operation, record the return air temperature and the supply air temperature�

33. Based on the heating source, document the appropriate temperatures, pressures, voltage or amp values�

Installation, Operation and Maintenance Manual

VertiCool Classic

and check the duct design, sheave turns open or make sure there is no blockage / obstruction

in the duct or lters.

Subject to change without notice. 20.10-IM (0617)

32

Installation, Operation and Maintenance Manual

VertiCool Classic

Air-Cooled Unit

Job Name: _________________________________ Date:____________

Start-Up Procedures

Complete the form by listing your name, company name, phone and fax number� Sign and date the form and provide a copy as required to all interested parties�

Screw Lugs & Terminals OK? ��Yes ___________ No ___________ Describe any loose connections and action(s) taken:

_________________________________________________________________________________________________

Power Supply Correct Voltage and Phase? ��Yes ___________ No ___________ If not in agreement with unit data tag contact the Distributor� _________________________________________________________________________________________________

Is the Circuit Protection the correct type and does it meet the unit data tag requirements? ��Yes ___________ No ___________

If not correct describe what action(s) have been taken to correct:

_________________________________________________________________________________________________

Unit controller wiring veried? ��Yes ___________ No ___________

“C” Terminal hooked up if necessary? ��Yes ___________ No ___________ _________________________________________________________________________________________________

Unit leak checked OK? ��Yes ___________ No ___________ If leak was located describe where and how repaired:

_________________________________________________________________________________________________

Condensate trapped & run to a suitable disposal point? ��Yes ___________ No ___________ _________________________________________________________________________________________________

Filters are in place, clean & usable?��Yes ___________ No ___________ _________________________________________________________________________________________________

Single Phase Unit Measured Voltage��L1-L2 __________ L1-GND __________ L2-GND _________

Three Phase Measured Voltage��L1-L2 ____________ L2-L3 ____________ L1-L3 _________ _________________________________________________________________________________________________

Evaporator Blower Motor Rotation OK? ��Yes ___________ No ___________ If three phase power and rotation is not correct describe action(s) taken to correct:

_________________________________________________________________________________________________

Condenser Blower Motor Rotation OK? ��Yes ___________ No ___________ If three phase power and rotation is not correct describe action(s) taken to correct:

_________________________________________________________________________________________________

Address: ____________________________________________________

City: ___________________________ State: ________ZIP ____________

Country: ____________________________________________________

Unit Model No.: ______________________________________________

Unit Serial No.: _______________________________________________

Continued on Next Page

Subject to change without notice. 20.10-IM (0617)

33

Installation, Operation and Maintenance Manual

VertiCool Classic

Evaporator External Static Pressure ��(ESP): ____________ In� WG ________________ _________________________________________________________________________________________________

Condenser External Static Pressure ��(ESP): ____________ In� WG ________________ _________________________________________________________________________________________________

Cooling Mode

_________________________________________________________________________________________________

System Air Temperatures ��Return: °F _________ Supply: °F _________________ _________________________________________________________________________________________________

Condenser Coil ��Outdoor Ambient: °F ___________ Condenser Discharge: °F ____________

Compressor 1 Compressor 2

Suction Pressure:

Suction Line Temperature:

Saturation Temperature: °F ________ °F ________

Suction Superheat: ° ________ ° ________

Liquid Line Pressure: psi _______ psi _______

Saturation Temperature:

Liquid Line Temperature:

Sub-cooling: ° ________ ° ________

psi _______

°F ________

psi _______

°F ________

Electrical

Evap� Motor Amps �� L1 ____________ L2 ___________ L3 ____________

Compressor 1 Amps �� L1 ____________ L2 ___________ L3 ____________

Compressor 2 Amps �� L1 ____________ L2 ___________ L3 ____________

Cond� Motor Amps �� L1 ____________ L2 ___________ L3 ____________ _________________________________________________________________________________________________

Heating Mode (Optional)

_________________________________________________________________________________________________

System Air Temperatures ��Return: °F _________ Supply: °F _________________ _________________________________________________________________________________________________

Entering Water Temperature:��Return: °F _________ Fluid Type: _________________

Leaving Water Temperature: ��Return: °F _________

Steam Pressure: ��psi _________

Electric:

kW: __________ Voltage: ___________

Amps: Stage1 �� L1 _____________ L2 ___________ L3 ____________

Stage2 �� L1 _____________ L2 ___________ L3 ____________ _________________________________________________________________________________________________

Misc� ____________________________________________________________________________________________

_________________________________________________________________________________________________

Technician (print name): _____________________________________________________________________________

Company: ________________________________________________________________________________________

Phone: __________________________________________________________ Fax: ____________________________

Signature: ______________________________________________________ Date: ____________________________

Subject to change without notice. 20.10-IM (0617)

34

Water-Cooled Unit

Start-Up Procedures (R-410a Systems)

1. Start up must be performed by a qualied HVAC

Technician�

2. Make certain that all power is disconnected at the main power circuit breaker or service disconnect before starting any of this procedure�

3. Check all electrical screw terminals and wiring lugs for tightness internal to the equipment� Components may have loosened due to vibration during transit or handling� Verify that the main power block lug

connections made in the eld are tight and secure.

4. Conrm that the voltage rating of the equipment data

tag coincides with the power that will be delivered to the unit�

5. Verify that the circuit protection for the unit satises

Local and National Codes according to the unit data tag Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS)�

6. Locate the unit thermostat and check all electrical terminations against the unit electrical diagram and for the unit thermostat�

Note: If using a digital thermostat with a “C” (Common)

terminal, this terminal MUST be terminated to the “C” terminal in the unit. Failure to do so will result in the thermostat shorting out and being destroyed.

7. Leak check the refrigerant system� While the unit was

leak checked at the factory, leaks can develop during transit and / or handling�

8. Conrm that the unit condensate has been adequately

trapped and taken to a suitable point for disposal�

9. Verify that the lters are in place, clean and usable.

10. Switch the unit thermostat to the “OFF” position�

11. Apply power to the unit� Switch the circuit breaker or

eld supplied electrical service disconnect switch to the

on position�

Note: If the unit has crankcase heaters and the surrounding

ambient is 70˚ F or lower, let the compressors sit for

approximately 24 hours before proceeding.

12. Record the voltage at the unit terminals�

13. If possible with the thermostat provided, switch the

evaporator blower to the RUN or ON position� Verify that the evaporator blower is activated�

Installation, Operation and Maintenance Manual

VertiCool Classic

14. Verify that the evaporator blower is rotating in the correct direction (three phase units only)�

Note: If the evaporator blower motor runs backwards,

shut off all power to the unit. Switch any two of the incoming power leads at the unit main power terminal block. The unit has been wired and phased properly at the factory. DO NOT change any factory wiring to correct for a phase problem.

Note: Before conducting the following start up sections

connect a suitable refrigerant gauge set to the unit Schrader connections. Install temperature sensors to

record the appropriate refrigerant line temperatures.

15. Set the thermostat switch to a temperature set point

approximately 5˚ lower than the space temperature.

Set the thermostat fan switch to the AUTO position� Set the thermostat operating mode to the COOL position� This should energize the compressor(s) and evaporator blower�

Note: Dependent upon the options and/or the thermostat,

there may be a delay for the compressor(s) operation.

16. While waiting for the compressor(s) to stabilize, record

the External Static Pressure (ESP) for the evaporator blower�

Note: Make sure all the unit access panels are in place when

taking these readings.

17. Verify that the incoming water / uid pressure does not

exceed the rating for the water / uid control valves.

18. Verify that the unit piping and heat exchangers will not be subjected to freezing conditions�

19. Conrm that no joints are leaking in the cooling uid

circuit(s)�

20. Document the type of uid being used as the cooling

medium� If glycol is being used, make sure the mixture is adequate for any low ambient conditions that may be possible�

21. If possible, record the uid ow rate (GPM).

a. Make sure the ow rate is within the proper limits:

i. Minimum 2�5 GPM / Ton

ii. Maximum 3�5 GPM / Ton

Continued on next page

Subject to change without notice. 20.10-IM (0617)

35

Start-Up Procedures (R-410a Systems) Continued:

22. Record the entering and leaving uid temperatures.

b. Make sure the leaving uid temperature is within the

proper limits:

i. Minimum 60˚ F

ii. Maximum 115˚ F

23. Record the pressure drop of the water / uid across the

unit�

24. Verify that all valves on each uid circuit function

properly�

25. Check the head pressure adjustment, DO NOT assume that this has been set at the factory� Typically this value

is to be 360 psi when 85˚ F water is supplied to the unit

at 3 GPM/Ton�

26. Record the return air temperature to the evaporator coil along with the supply air temperature� (The unit should have operated for at least 15 minutes before taking these readings)�

27. Record the suction line pressure and the suction line temperature for each circuit near the compressor�

28. Using an appropriate pressure / temperature chart for R-410a refrigerant, look up and record the saturation temperature corresponding to the suction pressure�

29. Calculate and record the suction superheat for each circuit by taking the difference between the suction line temperature and the saturation temperature corresponding to the suction pressure�

30. Record the liquid line pressure and the liquid line temperature for each circuit near the condenser heat exchanger outlet�

31. Using an appropriate pressure / temperature chart for R-410a refrigerant, look up and record the saturation temperature corresponding to the liquid line pressure�

32. Calculate and record the liquid sub-cooling for each circuit by taking the difference between the liquid line temperature and the saturation temperature corresponding to the liquid line pressure�

33. Record the Amps for the evaporator blower motor and each compressor� If the system is single phase, use L1 and L2 only�

a. Make sure the pressures on each compressor circuit

are within the proper limits:

i. 290 – 550 Discharge

ii. 100 – 140 psig Suction

b. Compressor Amperage is below the RLA Amps

listed on the unit data tag�

i. The maximum compressor operating current

c. The blower motor FLA value should never be

exceeded�

i. If the FLA value is exceeded, shut the unit off

34. Document any additional information deemed

appropriate for the specic application or installation.

35. Shut the system down and remove all test instruments and test sensors�

36. Leave the system in the operating mode as appropriate for the customer and the application�

Optional Heating Start Up:

37. If the system has any optional heat, set the room

thermostat approximately 5° higher than the actual room temperature� Set the thermostat operating mode to the HEAT position�

38. Dependent upon the heating source the heating valve or switch / contactor should be activated�

39. After several minutes of operation, record the return air temperature and the supply air temperature�

40. Based on the heating source, document the appropriate temperatures, pressures, voltage or amp values�

Installation, Operation and Maintenance Manual

VertiCool Classic

(amps) at start up depends a lot on the system loading� The lower the load, the less the current� The higher the load, the higher the current�

and check the duct design, sheave turns open or make sure there is no blockage / obstruction

in the duct or lters.

Subject to change without notice. 20.10-IM (0617)

36