Thermal Care TWC Series Instruction Manual

Table of Contents
Foreword .................................................................................................................................................................................................................. 1
Pre-Installation....................................................................................................................................................................................................... 2
Receiving Inspection ....................................................................................................................................................................................... 2
Unit Storage........................................................................................................................................................................................................ 2
Installation - Mechanical.................................................................................................................................................................................... 2
Foundation.......................................................................................................................................................................................................... 2
Unit Location ...................................................................................................................................................................................................... 2
Rigging.................................................................................................................................................................................................................. 2
Fluid Distribution Piping................................................................................................................................................................................ 2
Installation - Electrical......................................................................................................................................................................................... 3
Controller Operation ........................................................................................................................................................................................... 4
Start-Up .................................................................................................................................................................................................................... 4
Table 1 –Factory Default Controller Settings ................................................................................................................................... 4
Step 1 –Connect Chemical Feed Lines .................................................................................................................................................... 4
Step 2 –Check Water Make-Up and Drain Lines................................................................................................................................. 4
Step 3 - Connect Power ................................................................................................................................................................................. 4
Preventive Maintenance..................................................................................................................................................................................... 5

Page Intentionally Blank

1
Foreword
The water treatment system contains a controller,
chemical feed pumps, a water meter, and a blow
down valve intended to provide control of scale and
biological growth in an open-loop evaporative
cooling tower system.
This manual is to serve as a guide for installing,
operating, and maintaining the equipment. Improper
installation, operation, and maintenance can lead to
poor performance and/or equipment damage. Use
qualified installers and service technicians for all
installation and maintenance of this equipment.
This manual is for our standard product. The
information in this manual is general in nature. Unit-
specific drawings and supplemental documents are
included with the equipment as needed. Additional
copies of documents are available upon request.
Due to the ever-changing nature of applicable
codes, ordinances, and other local laws pertaining to
the use and operation of this equipment, we do not
reference them in this manual.
Safety Guidelines
Observe all safety precautions during installation,
start-up, and service of this equipment. The
following is a list of symbols used in this manual and
their meaning.
General Warning
Electricity Warning
Sharp Element Warning
Hot Surface Warning
Flammable Material Warning
Explosive Material Warning
General Mandatory Action
Wear Eye Protection
Wear Protective Gloves
Wear Ear Protection
Disconnect Before Carrying Out Maintenance or
Repair
Connect an Earth Terminal to Ground
Only qualified personnel should install, start-up, and
service this equipment. When working on this
equipment, observe precautions in this manual as
well as tags, stickers, and labels on the equipment.
WARNING: Any use or misuse of this equipment
outside of the design intent may cause injury or harm.
WARNING: This equipment contains hazardous
voltages that can cause severe injury or death.
WARNING: This equipment contains hot water or
coolant under pressure. Accidental release of hot water
or coolant under pressure can cause personal injury
and or property damage.
WARNING: This equipment may contain fan blades or
other sharp edges. Make sure all fan guards and other
protective shields are securely in place.
WARNING: The exposed surfaces of motors, piping,
and other fluid circuit components can be very hot
and can cause burns if touched with unprotected
hands.
CAUTION: Disconnect and lock out incoming power
before installing, servicing, or maintaining the
equipment. Connecting power to the main terminal
block energizes the entire electric circuitry of the unit.
Shut off the electric power at the main disconnect
before opening access panels for repair or
maintenance.
CAUTION: Wear eye protection when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.

2
CAUTION: The equipment will exceed 70 dBA sound
pressure at 1 meter distance and 1 meter elevation
when operating. Wear ear protection as required for
personal comfort when operating or working in close
proximity to the chiller.
CAUTION: Wear protective gloves when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.
Pre-Installation
Receiving Inspection
When the unit arrives, verify the information on the
unit nameplate agrees with the order
acknowledgement and shipping papers. Inspect the
equipment for any visible damage and verify all
items shown on the bill of lading are present. If
damage is evident, document it on the delivery
receipt by clearly marking any item with damage as
“unit damage” and notify the carrier. In addition,
notify our Customer Service Department and they
will provide assistance with preparing and filing
freight damage claims, including arranging for an
estimate on repair costs; however, filing the shipping
damage claim is the responsibility of the receiving
party. Do not install damaged equipment without
getting the equipment repaired.
Shipping damage is the responsibility of the carrier.
To protect against possible loss due to damage
incurred during shipping and to expedite payment
for damages, it is important to follow proper
procedures and keep records. Photographs of
damaged equipment are excellent documentation
for your records.
Start unpacking the unit, inspect for concealed
damage, and take photos of any damage found.
Once received, equipment owners have the
responsibility to provide reasonable evidence that
the damage did not occur after delivery. Photos of
the equipment damage while the equipment is still
partially packed will help in this regard. Refrigerant
lines can be susceptible to damage in transit. Check
for broken lines, oil leaks, damaged controls, or any
other major component torn loose from its
mounting point.
Record any signs of concealed damage and file a
shipping damage claim immediately with the
shipping company. Most carriers require concealed
damages be reported within 15 days of receipt of
the equipment. In addition, notify our Customer
Service Department and they will provide assistance
with preparing and filing freight damage claims,
including arranging for an estimate on repair costs;
however, filing the shipping damage claim is the
responsibility of the receiving party.
Unit Storage
When storing the unit it is important to protect it
from damage. Blow out any water from the unit;
cover it to keep dirt and debris from accumulating
on or getting in and store in an indoor sheltered
area that does not exceed 145°F.
Installation - Mechanical
Foundation
Install the unit on a rigid, non-warping mounting
pad, concrete foundation, or level floor suitable to
support the full operating weight of the equipment.
When installed the equipment must be level within
¼ inch over its length and width.
Unit Location
The unit is available in many different configurations
for various environments. Refer to the proposal and
order acknowledgement document for the
equipment to verify the specific design conditions in
which it can operate.
To ensure proper airflow and clearance space for
proper operation and maintenance allow a minimum
of 12 inches of clearance between the sides of the
equipment and any walls or obstructions. Avoid
locating piping or conduit over the unit to ensure
easy access with an overhead crane or lift to lift out
heavier components during replacement or service.
Rigging
The unit has a base with casters to facilitate easy
movement and positioning. Follow proper rigging
methods to prevent damage to components. Avoid
impact loading caused by sudden jerking when
lifting or lowering the unit. Use pads where abrasive
surface contact may occur.
Fluid Distribution Piping
Proper insulation of chilled process fluid piping is
crucial to prevent condensation. The formation of

3
condensation adds a substantial heat load to the
cooling system.
The importance of properly sized piping cannot be
overemphasized. See the ASHRAE Handbook or
other suitable design guide for proper pipe sizing. In
general, run full size piping out to the process and
then reduce the pipe size to match the connections
on the process equipment. One of the most
common causes of unsatisfactory unit performance
is poor piping system design. Avoid long lengths of
hoses, quick disconnect fittings, and manifolds
wherever possible as they offer high resistance to
water flow. When manifolds are required, install
them as close to the use point as possible. Provide
flow-balancing valves at each machine to assure
adequate water distribution in the entire system.
Install shut-off valves at each machine to allow for
isolation of the unit.
Installation - Electrical
All wiring must comply with local codes and the
National Electric Code. Minimum Circuit Amps (MCA)
and other unit electrical data are on the unit
nameplate. A unit specific electrical schematic ships
with the unit. Measure each leg of the main power
supply voltage at the main power source. Voltage
must be within the voltage utilization range given on
the drawings included with the unit. If the measured
voltage on any leg is not within the specified range,
notify the supplier and correct before operating the
unit. Voltage imbalance must not exceed two
percent. Excessive voltage imbalance between the
phases of a three-phase system can cause motors to
overheat and eventually fail. Voltage imbalance is
determined using the following calculations:
% Imbalance = (Vavg –Vx) x 100 / Vavg
Vavg = (V1 + V2 + V3) / 3
Vx = phase with greatest difference from Vavg
For example, if the three measured voltages were
442, 460, and 454 volts, the average would be:
(442 + 460 + 454) / 3 = 452
The percentage of imbalance is then:
(452 –442) x 100 / 452 = 2.2 %
This exceeds the maximum allowable of 2%.
There is a terminal block for main power connection
to the main power source. The main power source
should be connected to the terminal block through
an appropriate disconnect switch. There is a separate
lug in the main control panel for grounding the unit.
Check the electrical phase sequence at installation
and prior to start-up. Operation of the unit with
incorrect electrical phase sequencing will result in
improper pump performance. Check the phasing
with a phase sequence meter prior to applying
power. The proper sequence should read “ABC” on
the meter. If the meter reads “CBA”, open the main
power disconnect and switch two line leads on the
line power terminal blocks (or the unit mounted
disconnect). Do not interchange any load leads that
are from the unit contactors or the motor terminals.
WARNING: This equipment contains hazardous
voltages that can cause severe injury or death.
WARNING: This equipment contains hot water or
coolant under pressure. Accidental release of hot water
or coolant under pressure can cause personal injury
and or property damage.
WARNING: This equipment may contain fan blades or
other sharp edges. Make sure all fan guards and other
protective shields are securely in place.
WARNING: The exposed surfaces of motors, piping,
and other fluid circuit components can be very hot
and can cause burns if touched with unprotected
hands.
CAUTION: Disconnect and lock out incoming power
before installing, servicing, or maintaining the
equipment. Connecting power to the main terminal
block energizes the entire electric circuitry of the unit.
Electric power at the main disconnect should be shut
off before opening access panels for repair or
maintenance.
CAUTION: Wear eye protection when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.
CAUTION: Wear protective gloves when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.
CAUTION: Wire the unit ground in compliance with
local and national codes.

4
Controller Operation
The system uses a controller that monitors the
amount of make-up water added to the system. It
controls a blow down valve and two chemical feed
pumps. Contact your chemical supplier for expert
review of your water chemistry needs and for
assistance in properly programing and setting up the
controls and your water monitoring and
maintenance program.
Start-Up
Use a qualified technician to perform the start-up
procedure in sequence. The following serves as a
checklist for the initial start-up and for subsequent
start-ups if the unit is out of service for a prolonged
time.
The factory default values in the controller are as
follows.
Table 1 –Factory Default Controller Settings
Item
Parameter
Default Setting
Relay 1
Name
BLOW (blow down valve)
Setpoint
1000 micro Ohms
Deadband
30 micro Ohms
Timeout
3 hours
Bio-Lockout
Yes
Relay 2
Name
INHB (scale inhibitor)
By
Water Meter
Setpoint
50 gallons
Feed Time
1 minute
Bio-Lockout
No
Relay 3
Name
BIO (biocide)
By
BioSchedule
Day
Wednesday
Feed Duration
1 hour
Lockout
2 hours
Relay 4
Name
ALRM (alarm)
By
Alarm
Activate
All alarms
Alarms
High
1,200 micro Ohms
Low
750 micro Ohms
Meters
Make-up contacts
per gallon
1” turbine = 60
2” turbine = 15
Clock
Time Zone
Central Standard Time
WARNING: This equipment contains hazardous
voltages that can cause severe injury or death.
WARNING: This equipment contains hot water or
coolant under pressure. Accidental release of hot water
or coolant under pressure can cause personal injury
and or property damage.
WARNING: This equipment may contain fan blades or
other sharp edges. Make sure all fan guards and other
protective shields are securely in place.
WARNING: The exposed surfaces of motors, piping,
and other fluid circuit components can be very hot
and can cause burns if touched with unprotected
hands.
CAUTION: Disconnect and lock out incoming power
before installing, servicing, or maintaining the
equipment. Connecting power to the main terminal
block energizes the entire electric circuitry of the unit.
Electric power at the main disconnect should be shut
off before opening access panels for repair or
maintenance.
CAUTION: Wear eye protection when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.
CAUTION: Wear protective gloves when installing,
maintaining, or repairing the equipment to protect
against any sparks, debris, or fluid leaks.
CAUTION: Wire the unit ground in compliance with
local and national codes.
Step 1 –Connect Chemical Feed Lines
Connect the chemical feed lines from the chemical
feed pumps to the drums of chemicals.
Step 2 –Check Water Make-Up and Drain
Lines
Check the drain line is properly connected and any
valves leading from the unit to the drain are open. In
addition, check the water make-up line is connected
and properly installed and any valves in the make-up
line are fully open.
Step 3 - Connect Power
Connect main power properly ensuring it matches
the voltage shown on the nameplate of the unit.
After making proper power connection and
grounding, turn the main power on.
The unit is now ready for service.

5
Preventive Maintenance
Once your unit is in service, the maintenance is
simple. Periodically check the chemical levels and
make sure they are adequate for normal operation.
Also, check all chemical and water for leaks and
repair as needed. As recommended by your chemical
provider perform periodic water chemistry tests to
check water chemistry and make any controller
settings adjusted as needed to maintain the desired
water chemistry of the system.

Notes

5680 W. Jarvis Ave. •Niles, IL 60714
New Equipment Sales
Customer Service
Parts Department
847-966-2260 •[e-mail]
847-966-2260 •847-966-9358(fax)
847-966-2636
847-966-8560 •847-966-9358(fax)
www.thermalcare.com
[e-mail]
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TWC IOM 00