Installation, Operation and Maintenance Manual SQ Series

Installation, Operation and
Maintenance Manual
SQ Series
Portable Chillers
5 to 14 Tons
Page Intentionally Blank
Table of Contents
Foreword ............................................................................................................................................................................. 1
Installation .......................................................................................................................................................................... 1
Receiving Inspection ................................................................................................................................................................ 1
Rigging, Handling, and Locating Equipment ............................................................................................................................. 1
Electrical Power ........................................................................................................................................................................ 2
Table 1 - Voltage Utilization Range ....................................................................................................................................... 2
Water Cooled Condenser Water Lines ..................................................................................................................................... 2
Table 2 - Condenser Water Flow Requirements ................................................................................................................... 3
Air Cooled Condenser Air ......................................................................................................................................................... 3
Chilled Water Lines .................................................................................................................................................................. 3
Table 3 - SQ Series Chilled Water Flow Requirements ......................................................................................................... 3
Figure 1 - Recommended Overhead Piping .......................................................................................................................... 4
Remote Air Cooled Condenser Interconnecting Refrigerant Piping ......................................................................................... 4
Start-Up ............................................................................................................................................................................... 4
Table 4 – Required Ethylene Glycol Solutions (% Glycol by Weight) .................................................................................... 5
Table 5 - Required Propylene Glycol Solutions (% Glycol by Weight) .................................................................................. 5
Controller Operation ........................................................................................................................................................... 8
Table 6 - Microprocessor Control Fault Logic ....................................................................................................................... 8
Power ....................................................................................................................................................................................... 9
Start .......................................................................................................................................................................................... 9
Stop .......................................................................................................................................................................................... 9
Alarm Reset .............................................................................................................................................................................. 9
Alarm Silence ............................................................................................................................................................................ 9
Lower Set Point Temperature .................................................................................................................................................. 9
Raise Set Point Temperature .................................................................................................................................................... 9
No Flow .................................................................................................................................................................................... 9
High Refrigerant Pressure ...................................................................................................................................................... 10
Low Refrigerant Pressure ....................................................................................................................................................... 10
Freezestat ............................................................................................................................................................................... 10
Low Oil Pressure ..................................................................................................................................................................... 10
Over Set Point ........................................................................................................................................................................ 10
Under Set Point ...................................................................................................................................................................... 10
Pump On................................................................................................................................................................................. 10
Compressor On....................................................................................................................................................................... 11
Partial Load ............................................................................................................................................................................ 11
Water Make-Up...................................................................................................................................................................... 11
Low Water Level ..................................................................................................................................................................... 11
High Water Temperature ....................................................................................................................................................... 11
Probe Fault ............................................................................................................................................................................. 11
Changing Temperature Display Scale ..................................................................................................................................... 12
Diagnostic Error Codes ........................................................................................................................................................... 13
Table 7 - Diagnostic Error Codes ......................................................................................................................................... 13
Control Options ................................................................................................................................................................. 14
Return Water Temperature Display ....................................................................................................................................... 14
Remote On/Off Contacts ........................................................................................................................................................ 14
Remote Alarm Contacts ......................................................................................................................................................... 14
Alarm Horn ............................................................................................................................................................................. 14
Remote Control Panel ............................................................................................................................................................ 14
SPI Communications............................................................................................................................................................... 14
Table 8 - SPI Baud Rate Adjustment ................................................................................................................................... 15
Chiller Operation ............................................................................................................................................................... 15
Coolant Circuit ........................................................................................................................................................................ 15
Refrigerant Circuit .................................................................................................................................................................. 15
Chiller Construction ........................................................................................................................................................... 16
Compressor ............................................................................................................................................................................ 16
Air Cooled Condenser............................................................................................................................................................. 16
Water Cooled Condenser ....................................................................................................................................................... 16
Condenser Water Regulating Valve ....................................................................................................................................... 16
Remote Air-Cooled Condenser ............................................................................................................................................... 17
Evaporator .............................................................................................................................................................................. 17
Thermostatic Expansion Valve (TXV) ...................................................................................................................................... 17
Refrigerant Sight Glass ........................................................................................................................................................... 17
Refrigerant Filter Drier ........................................................................................................................................................... 17
Fusible Plug ............................................................................................................................................................................ 17
Hot Gas Bypass Valve ............................................................................................................................................................. 17
Reservoir ................................................................................................................................................................................ 18
Coolant Pump ......................................................................................................................................................................... 18
Pressure Gauge ...................................................................................................................................................................... 18
Y-Strainer................................................................................................................................................................................ 18
High Refrigerant Pressure Switch ........................................................................................................................................... 18
Low Refrigerant Pressure Switch ........................................................................................................................................... 18
Freezestat ............................................................................................................................................................................... 18
Coolant Flow Switch ............................................................................................................................................................... 18
Automatic Water Make-Up (Optional) ................................................................................................................................... 19
Upgraded Pumps (Optional)................................................................................................................................................... 19
Preventive Maintenance ................................................................................................................................................... 19
Once a Week .......................................................................................................................................................................... 19
Once a Month ........................................................................................................................................................................ 19
Every Three Months ............................................................................................................................................................... 20
Preventive Maintenance Checklist ..................................................................................................................................... 21
Troubleshooting ................................................................................................................................................................ 22
Charts and Drawings .......................................................................................................................................................... 24
Table 9 - SQ2A05, SQR05, SQ2W05, SQ2A08 & SQ2W08 Electrical Specifications ............................................................ 24
Table 10 - SQ2A10, SQ2R10, SQ2W10, & SQ2A14 Electrical Specifications ....................................................................... 25
Figure 2 - 60 Hz Pump Curves ............................................................................................................................................. 26
Warranty ........................................................................................................................................................................... 27
Foreword
The intent of this manual is to serve as a guide for placing your portable chiller in service and operating and maintaining it
properly. This manual is supplemented as required to accommodate any special items that may have been provided for a
specific application. The written information contained in this manual, as well as various drawings, are intended to be
general in nature. The schematics included in this manual are typical only. Actual schematics are included in the electrical
enclosure of the chiller and should be referred to for troubleshooting and servicing of the unit. Additional copies of wiring
diagrams are available upon request. We strive to maintain an accurate record of all equipment during the course of its
useful life. While every effort is made to standardize the design features of these chillers, the various options may make it
necessary to rearrange some of the components; therefore, some of the general drawings in this manual may differ from
your specific unit.
Specific references to current applicable codes, ordinances, and other local laws pertaining to the use and operation of this
equipment are avoided due to their ever-changing nature. There is no substitute for common sense and good operating
practices when placing any mechanical equipment into operation. We encourage all personnel to familiarize themselves
with this manual's contents. Failure to do so may unnecessarily prolong equipment down time.
The chilling equipment uses chemical refrigerants for heat transfer purposes. This chemical is sealed and tested in a
pressurized system containing ASME coded vessels; however, refrigerant gas can be released if there is a system failure.
Refrigerant gas can cause toxic fumes if it is exposed to fire. These units must be placed in a well-ventilated area, especially
if open flames are present.
Failure to follow these instructions could result in a hazardous condition. Consult the unit serial tag for information about
the refrigerant type and charge amount. Customers are advised to immediately implement a refrigerant management
program including a survey of all equipment to document the type and quantity of refrigerant in each machine. All
refrigeration service technicians must be certified by an EPA approved organization. It is recommended that good piping
practices are followed and that the information in this manual is adhered to. We cannot be held responsible for liabilities
created by substandard piping methods and installation practices external to the chiller.
We trust your equipment will have a long and useful life. If you should have any questions, please contact our Customer
Service Department specifying the serial number and model number of the unit as indicated on the nameplate.
Installation
Receiving Inspection
Each unit is skid mounted and boxed or crated to protect it during shipping. If the chiller has a remote air-cooled condenser,
the chiller and the condenser will ship skid mounted and will contain a holding charge of nitrogen. Before accepting
delivery, check the box or crate for visible damage. If damage is evident, it should be properly documented on the delivery
receipt and the box or crate should be immediately removed to allow for detailed inspection of the unit. Check for broken
refrigerant lines, oil leaks, damaged controls, or any other major component torn loose from its mounting point. Any sign of
damage should be recorded and a claim filed immediately with the shipping company. In order to expedite payment for
damages it is important to record and document damage. An excellent way to do this is by taking pictures. Our Customer
Service Department will provide assistance with the preparation and filing of your claims, including arranging for an
estimate and quotation on repairs.
Rigging, Handling, and Locating Equipment
The units have a welded steel tube frame that has been designed to allow the unit to be positioned with a forklift. Proper
rigging methods must be followed to prevent damage to components. Avoid impact loading caused by sudden jerking when
lifting or lowering the chiller. Use pads where abrasive surface contact is anticipated.
The unit is designed for indoor use. If it is necessary to store the chiller in an unheated area when not in use, be sure that all
water is drained or that an adequate amount of antifreeze is added to prevent freeze-up of the unit. A primary concern
when designing your unit was serviceability, therefore, the chiller should be located in an accessible area.
1
Electrical Power
All wiring must comply with local codes and the National Electric Code. Minimum circuit ampacities and other unit electrical
data are on the unit nameplate and are shown in the Electrical Specification section at the back of this manual. A specific
electrical schematic is shipped 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 in Table 1.
Table 1 - Voltage Utilization Range
Rated Voltage
Utilization Range
230
208 to 254
460
414 to 506
575
516 to 633
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%.
A terminal block is provided 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. A separate lug for grounding the unit is also
provided in the main control panel. Electrical phase sequence must be checked at installation and prior to start-up.
Operation of the compressor with incorrect electrical phase sequencing will result in mechanical damage to the
compressors. The phasing must be checked 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). All components requiring electric power are wired inphase at the factory. Do not interchange any load leads that are from the unit contactors or the motor terminals.
WARNING: It is imperative that L1-L2-L3 are connected in the A-B-C phase sequence to prevent equipment damage due to reverse
rotation.
CAUTION: The unit requires the main power to remain connected during off-hours to energize the compressor’s crankcase heater.
Disconnect main power only when servicing the chiller. The crankcase heater should remain on when the compressor is off to ensure
liquid refrigerant does not accumulate in the compressor crankcase.
WARNING: The control panel and safeties are wired such that connecting the appropriate power source to the main terminal block
energizes the entire electric circuitry of the chiller. A control transformer has been factory wired to step down the incoming power to
the 115-volt control power. Electric power at the main disconnect should be shut off before opening access panels for repair or
maintenance. The unit must be properly grounded in compliance with local and national codes.
Water Cooled Condenser Water Lines
The performance of the condenser is dependent on maintaining the proper flow and temperature of water through the
heat exchanger. Insufficient water flow or high condenser water supply temperatures will result in the reduction of cooling
capacity of the chiller. Extreme conditions will eventually result in the chiller shutting down due to high refrigerant
pressure. Performance can be adversely affected if the condenser is allowed to plug up from contaminants in the condenser
2
water stream. In order to reduce maintenance costs and chiller downtime, a water treatment program is highly
recommended for the condenser cooling water. If any condenser does become plugged, contact our Customer Service
Department for assistance in the proper procedure for cleaning out the condenser.
The standard cooling capacity is based upon 85°F (29°C) condenser cooling water supply. Under normal operating
conditions there will be a 10°F (6°C) rise through the condenser resulting in 95°F (35°C) exiting water temperature from the
condenser. To ensure proper water flow through the condenser, the condenser water pump should be able to handle up to
2
25 PSI (1.75 Kg/cm ) pressure drop through the condenser. While the design pressure loss is much lower than 25 PSI (1.75
2
Kg/cm ), we recommend the pumping system be sized for this loss to ensure there will be sufficient supply pressure to the
condensers. To prevent damage to the condenser or regulating valve, the condenser water pressure should not exceed 150
2
PSIG (10.5 Kg/cm ). The condenser water regulating valve controls the condenser water flow. The chiller loading and
condenser water inlet temperature will determine the actual flow. Table 2 shows minimum condenser water flow
requirements for the different size chillers at different supply temperatures.
Model Number
SQ2W05
SQ2W08
SQ2W10
Table 2 - Condenser Water Flow Requirements
GPM (L/min) @ GPM (L/min) @ GPM (L/min) @ GPM (L/min) @
70°F (21°C)
75°F (24°C)
80°F (27°C)
85°F (29°C)
9 (34)
11 (42)
14 (53)
20 (76)
12 (45)
15 (57)
19 (72)
27 (102)
17 (64)
20 (76)
26 (98)
38 (144)
GPM (L/min) @
90°F (32°C)
Call Factory
Call Factory
Call Factory
The minimum flows are determined using the condenser water regulating valve setting of 210 PSI for a given supply
temperature. The supply temperature range is from 70°F (24°C) to 90°F (32°C). Supply temperatures beyond this range are
not recommended and may lead to improper chiller operation.
Air Cooled Condenser Air
In order to accommodate the air-cooled condenser, the chiller must be located in a well-ventilated area. A minimum of
three feet of clearance is required at both the condenser air inlet and condenser air discharge. Improper clearance or poor
ventilation will reduce the cooling capacity of the chiller and may cause high refrigerant pressure problems. The condenser
air inlet temperature should be maintained above 60°F (15°C) in order to avoid possible low refrigerant pressure safety trips
during start-up.
Chilled Water Lines
All chilled water piping should be adequately insulated to prevent condensation. If water is allowed to condense on the
piping, the state change of the water from gas to liquid will result in a substantial heat load that becomes an additional
burden for the chiller. Standard portable chillers have been designed to provide 50°F (10°C) coolant to the process. Under
normal operating conditions there will be a 10°F (6°C) rise through the process resulting in 60°F (16°C) return coolant
temperature to the chiller.
Table 3 - SQ Series Chilled Water Flow Requirements
Nominal Flow
Pressure Drop
Model
GPM (L/min)
PSI (Kg/cm2)
SQ2A05
13 (49)
1 (.07)
SQ2W05
13 (49)
1 (.07)
SQ2A08
18 (68)
3 (.21)
SQ2W08
18 (68)
3 (.21)
SQ2A10
24 (91)
5 (.35)
SQ2W10
26 (98)
5 (.35)
SQ2A14
31 (117)
8 (.56)
The importance of properly sized piping between the chiller and process 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 chiller performance is poorly designed piping. Avoid unnecessarily long lengths of hoses or quick disconnect
fittings that offer high resistance to water flow. When manifolds are required for water distribution, they should be
installed as close to the use point as possible. Provide flow-balancing valves at each machine to assure adequate water
distribution in the entire system. The connection labeled “Chilled Water Supply” delivers fluid to the process and the
connection labeled “Chilled Water Return” receives water back from the process. Typically when piping is overhead with a
total run length over 90 feet (27 M) there should be a valve in the supply line and an inverted P trap with a vacuum break
valve installed as shown in Figure 1.
3
Figure 1 - Recommended Overhead Piping
12" ABOVE HIGHEST
POINT OF SYSTEM
1/2" VACUUM BREAK
CHECK VALVE
NOTE:
IF PIPING IS ABOVE CHILLER AND EXCEEDS
90 FEET IN TOTAL LENGTH, INSTALL TRAP AND
VACUUM BREAK TO THE RETURN LINE AND
ADD A CHECK VALVE TO THE SUPPLY LINE.
Remote Air Cooled Condenser Interconnecting Refrigerant Piping
Remote air cooled condenser chillers ship with a nitrogen holding charge and has a full charge of oil, excluding the
additional charge for field piping. Proper evacuation is required prior to charging with refrigerant. The chiller is for use only
with the air-cooled condenser provided with the unit. The following section covers the required piping between the chiller
and the provided air-cooled condenser.
Caps are located on the discharge and liquid lines. These line sizes do not necessarily reflect the actual line sizes required
for the piping between the chiller and the air-cooled condenser. The installing contractor need only provide the
interconnecting piping between the chiller and the air-cooled condenser.
Refrigerant piping size and piping design has a significant effect on system performance and reliability. For specific pipe
sizing and configuration, refer to the SQR Series Chiller Remote Air Cooled Condenser Installation Guidelines Manual. All
piping should conform to the applicable local and state codes. Use refrigerant grade copper tubing only and isolate the
refrigeration lines from building structures to prevent transfer of vibration. Do not use a saw to remove end caps. This
might allow copper chips to contaminate the system. Use a tube cutter or heat to remove the caps. When sweating copper
joints it is important to flow dry nitrogen through the system. This prevents scale formation. Do not use soft solders. For
copper-to-copper joints use a phos-copper solder with 6% to 8% silver content. Use a high silver content brazing rod for
copper-to-brass or copper-to-steel joints. Only use oxy-acetylene brazing.
Start-Up
Every unit is factory set to deliver chilled water in accordance with the standard operating specifications for that particular
chiller. Due to variables involved with different applications and different installations, minor adjustments may be required
during the initial start-up to ensure proper operation. The following start-up procedure should be followed in sequence. If
trouble is encountered during start-up, the fault can usually be traced to one of the control or safety devices. This outline
can be used as a checklist for the initial start-up and for subsequent start-ups if the chiller is taken out of service for a
prolonged period of time.
1.
4
Assure the main power source is connected properly, that it matches the voltage shown on the nameplate of the unit,
and that it is within the voltage utilization range given in Table 1. Electrical phase sequence must be checked at
installation and prior to start-up. Operation of the compressor with incorrect electrical phase sequencing will result in
mechanical damage to the compressors. The phasing must be checked 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). All
components requiring electric power are wired in-phase at the factory. Do not interchange any load leads that are from
the unit contactors or the motor terminals. Once proper power connection and grounding have been confirmed, turn
the main power on.
WARNING: It is imperative that L1-L2-L3 are connected in the A-B-C phase sequence to prevent equipment damage due to reverse
rotation.
Note: The main power must be on for 24 hours prior to starting the compressor to allow the crankcase heater to sufficiently vaporize any liquid
refrigerant that may be present in the compressor.
Check to make sure that all process chilled water piping connections are secure. Open the cabinet and fill the chilled
water reservoir with the proper water or water/glycol solution. Use glycol with a corrosion inhibitor only. See Table 4
and Table 5 for recommended glycol solutions.
Chiller Set Point
Chiller Set Point
2.
80°F (27°C)
75°F (24°C)
70°F (21°C)
65°F (18°C)
60°F (16°C)
55°F (13°C)
50°F (10°C)
45°F (7°C)
40°F (4°C)
35°F (2°C)
30°F (-1°C)
25°F (-4°C)
20°F (-7°C)
15°F (-9°C)
10°F (-12°C)
5°F (-15°C)
0°F (-18°C)
80°F (27°C)
75°F (24°C)
70°F (21°C)
65°F (18°C)
60°F (16°C)
55°F (13°C)
50°F (10°C)
45°F (7°C)
40°F (4°C)
35°F (2°C)
30°F (-1°C)
25°F (-4°C)
20°F (-7°C)
15°F (-9°C)
10°F (-12°C)
5°F (-15°C)
0°F (-18°C)
40°F
(4°C)
0%
0%
0%
0%
0%
0%
0%
0%
5%
15%
20%
25%
30%
35%
35%
40%
45%
Table 4 – Required Ethylene Glycol Solutions (% Glycol by Weight)
Coldest Ambient Condition Chiller Exposed To
35°F
30°F
25°F
20°F
15°F
10°F
5°F
0°F
-5°F
(2°C)
(-1°C)
(-4°C) (-7°C)
(-9°C) (-12°C) (-15°C) (-18°C) (-21°C)
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
0%
5%
15%
20%
25%
30%
35%
35%
40%
5%
5%
15%
20%
25%
30%
35%
35%
40%
15%
15%
15%
20%
25%
30%
35%
35%
40%
20%
20%
20%
20%
25%
30%
35%
35%
40%
25%
25%
25%
25%
25%
30%
35%
35%
40%
30%
30%
30%
30%
30%
30%
35%
35%
40%
35%
35%
35%
35%
35%
35%
35%
35%
40%
35%
35%
35%
35%
35%
35%
35%
35%
40%
40%
40%
40%
40%
40%
40%
40%
40%
40%
45%
45%
45%
45%
45%
45%
45%
45%
45%
40°F
(4°C)
0%
0%
0%
0%
0%
0%
0%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
Table 5 - Required Propylene Glycol Solutions (% Glycol by Weight)
Coldest Ambient Condition Chiller Exposed To
35°F
30°F
25°F
20°F
15°F
10°F
5°F
0°F
-5°F
-10°F
-15°F
-20°F
(2°C)
(-1°C)
(-4°C) (-7°C)
(-9°C) (-12°C) (-15°C) (-18°C) (-21°C) (-23°C) (-26°C) (-29°C)
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
0%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
10%
10%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
15%
15%
15%
20%
25%
30%
35%
40%
40%
45%
45%
50%
20%
20%
20%
20%
25%
30%
35%
40%
40%
45%
45%
50%
25%
25%
25%
25%
25%
30%
35%
40%
40%
45%
45%
50%
30%
30%
30%
30%
30%
30%
35%
40%
40%
45%
45%
50%
35%
35%
35%
35%
35%
35%
35%
40%
40%
45%
45%
50%
40%
40%
40%
40%
40%
40%
40%
40%
40%
45%
45%
50%
40%
40%
40%
40%
40%
40%
40%
40%
40%
45%
45%
50%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
50%
-10°F
(-23°C)
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
-15°F
(-26°C)
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
45%
-20°F
(-29°C)
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
Note: When your application requires the use of glycol, use industrial grade glycol specifically designed for heat
transfer systems and equipment. Never use glycol designed for automotive applications. Automotive glycols typically
have additives engineered to benefit the materials and conditions found in an automotive engine; however, these
additives can gel and foul heat exchange surfaces and result in loss of performance or even failure of the chiller. In
addition these additives can react with the materials of the pump shaft seals resulting in leaks or premature pump
failures.
3.
(SQ2W Models Only) Check the condenser water lines to make sure all connections are secure. Make sure sufficient
condenser water flow and pressure are available, the condenser water supply is turned on, and all shut-off valves are
opened.
5
4.
(SQR Models Only) Check the refrigerant lines to make sure all connections are secure and that a proper evacuation of
the chiller, the field piping, and the remote condenser has occured.
5.
Charge the chiller with refrigerant. For SQR chillers, please refer to the SQR Series Chiller Remote Air-Cooled Condenser
Installation Guidelines Manual to determine the required refrigerant charge. SQA and SQW chillers come factory
charged and should require no additional refrigerant.
6.
(SQR Models Only) Check the remote condenser main power and control wiring to ensure all connections are secure.
7.
Verify that all refrigerant valves are open.
CAUTION: Do not operate the unit with the compressor or liquid line service valves “CLOSED”. Failure to have these “OPEN” may
cause serious compressor damage.
8.
Make sure the Freezestat is set appropriately for the operating conditions of the chiller. The Freezestat is located inside
the main electrical control panel. It should be set at 10°F (5°C) below the minimum chilled water temperature setting
that the chiller will be operating. Reference Table 4 and Table 5 to be sure the coolant solution has sufficient freeze
protection (glycol) to handle at least 5°F (2.8°C) below the Freezestat setting. All chillers are shipped from the factory
with the Freezestat set at 38°F (3°C). This is done to protect against a possible freeze-up if no glycol has been added to
the coolant. Once the proper glycol solution has been added, the Freezestat can be adjusted to the appropriate setting.
Note: The manufacturer’s warranty does not cover the evaporator from freezing. It is vital that the Freezestat is set properly.
9.
Turn on the control power by turning the Power button to "On". The panel displays should now be illuminated.
10. Due to extreme ambient temperatures that the unit may be exposed to during shipment, the High Refrigerant Pressure
switch may have tripped. If this is the case, disconnect the main power and reset the High Refrigerant Pressure by
depressing the manual reset button located on the switch. Reconnect the main power and turn the control power on
by pressing the Power button. Clear the alarm condition by pressing the Alarm Reset button.
11. Establish flow through the evaporator. Standard units are provided with an internal pump that can be energized by
pressing the Start button. If the unit has been customized and does not have an internal pump, the external pump
should be energized to establish flow through the evaporator.
Note: The compressor will not start as long as the flow switch is open. A positive flow must be established through the evaporator before the
compressor can operate.
12. Set water flow through the evaporator as indicated in Table 3. A significant increase in flow beyond the recommended
rate may damage the evaporator and create excessive pressure drops that influence the overall efficiency of the
system.
WARNING: Chilled water maintenance is extremely important to ensure optimal chiller performance and reliable operation. The
pH of your water system is critical to the performance of your new chiller. A pH of 7.4 should be maintained and at no times
should the pH be below 7.0 or above 8.0. Should this happen, possible catastrophic failure of the chiller system could occur
leading to significant repair costs which are not covered under warranty.
13. Set the desired leaving water temperature on the control panel using the Up and Down buttons. The chiller should now
be controlling to the selected temperature. Please note that if there is insufficient load the compressor may cycle on
and off causing swings in temperature.
WARNING: Under no circumstance should the High Refrigerant Pressure or the Low Compressor Pressure switch be deactivated.
Failure to heed this warning can cause serious compressor damage, severe personal injury or death.
14. Regulation of the chiller temperature is based on return water temperature. Unless otherwise specified, it is factory set
to deliver coolant at 50°F (10°C). Adjust to the desired operating temperature. Resetting the temperature will change
the operating conditions of the chiller. Any lower readjustment of the controller must be done only after referencing
Table 4 and Table 5 to ensure that the coolant has adequate antifreeze protection.
6
15. Operate the system for approximately 30 minutes. Check the liquid line sight glass. The refrigerant flow past the sight
glass should be clear. Bubbles in the refrigerant indicate either low refrigerant charge or excessive pressure drop in the
liquid line. A shortage of refrigerant is indicated if operating pressures are low and subcooling is low. Normal
subcooling ranges are from 10°F (5.5°F) to 20°F (11°C). If subcooling is not within this range, check the superheat and
adjust if required. The superheat should be approximately 10°F (5.5°C). Since the unit is factory charged, adding or
removing refrigerant charge should not be necessary. If the operating pressures, sight glass, superheat, and subcooling
readings indicate a refrigerant shortage, gas-charge refrigerant as required. With the unit running, add refrigerant
vapor by connecting the charging line to the suction service valve and charging through the backseat port until
operating conditions become normal.
CAUTION: A clear sight glass alone does not mean that the system is properly charged. Also check system superheat, subcooling,
and unit operating pressures. If both suction and discharge pressures are low but subcooling is normal, a problem other than
refrigerant shortage exists. Do not add refrigerant, as this may result in overcharging the circuit.
Once proper flow and temperature are achieved, press the Stop button.
The unit is now ready to be placed into service.
7
Controller Operation
TO PROCESS
SET POINT
?
The chiller includes a microprocessor controller designed to perform all control functions directly from the front panel.
When a button is depressed, a click will be felt and the corresponding LED will be energized. Only one button should be
pressed at a time. Table 6 shows the basic control fault logic for the microprocessor controller.
Table 6 - Microprocessor Control Fault Logic
Fault
Alarm
Indication
Compressor
Shutdown
Pump
Shut Off
No Flow
LED
Yes
Yes
High Refrigerant Pressure
LED
Yes
Yes
Low Refrigerant Pressure
LED
Yes
No
Freezestat
LED
Yes
No
Low Oil Pressure
LED
Yes
Yes
Over Set Point
LED
No
No
Under Set Point
LED
Yes
No
Low Water Level
LED
No
No
High Water Temperature
LED
No
No
Probe Fault
LED
Yes
Yes
Low Power
Pr OFF
Yes
Yes
Pump Overload
Err 126
Yes
Yes
Compressor Overload
Err 127
Yes
Yes
High Temperature Safety
Err 128
Yes
Yes
1
Alarm Reset button or Stop button on control panel must be pressed.
2
Safety control must be manually reset before the controller can be reset.
3
Activates the alarm horn (if included) and closes the alarm contact (if included).
8
Alarm
Reset
Required1
No
Yes
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Manual
Reset
Required2
No
Yes
No
No
Yes
No
No
No
No
No
No
Yes
No
No
Remote
Alarm
Activated3
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Power
Depressing the Power button will switch the control power on or off. Control power must be initiated before either the
Start button or remote on/off contacts can start the chiller.
Start
Depressing the Start button will start the pump and enable the compressor. The compressor (and condenser fans or
blowers if the chiller is air cooled) will start only if the microprocessor is calling for cooling because the actual To Process
temperature is higher than the Set Point temperature.
Note: Once the compressor has cycled off, it will not restart for 2.5 minutes because of an internal anti-cycle time delay.
Stop
Depressing the Stop button will shut off the compressor, pump, condenser fans or blowers (if the chiller is air cooled), and
clear all fault signals.
Alarm Reset
Depressing the Alarm Reset button will reset any fault indicator that has been activated on the control board. This includes
any LED indicators or alarm codes. The High Refrigerant Pressure, Low Oil Pressure, and Pump Overload require a
mechanical safety to be manually reset before the control board can be reset.
Note: If the condition still exists that originally caused the alarm indication, the alarm may be reactivated as soon as it is reset.
Alarm Silence
The Alarm Silence button is only functional if the Alarm Horn option and/or Remote Alarm Contact option has been
purchased. If the Alarm Horn option has been purchased, depressing the Alarm Silence button will disable the horn. The
horn will not reactivate until the alarm has been reset and a subsequent alarm has been triggered. If the Remote Alarm
contacts option has been purchased, depressing the Alarm Silence button will open the contact that was closed when the
alarm occurred. The contact will not close again until the alarm has been reset and a subsequent alarm has been triggered.
Lower Set Point Temperature
Each time the Lower Set Point Temperature button is depressed and released the Set Point temperature will decreased by
1°F (or 1°C). If the Lower Set Point Temperature button is held down, the Set Point temperature will continue to decrease
until the button is released.
Raise Set Point Temperature
Each time the Raise Set Point Temperature button is depressed and released the Set Point temperature will increased by
1°F (or 1°C). If the Raise Set Point Temperature button is held down, the Set Point temperature will continue to increase
until the button is released.
No Flow
The No Flow LED will be illuminated if the flow through the chiller is below the preset acceptable level. When the Start
button is depressed, this safety is defeated for a period of 20 seconds in order for the pump to establish flow. The No Flow
LED may remain illuminated during this 20 second period. This safety will shut off the pump and the compressor. If the
chiller has been shut down by the No Flow safety, the Start button must be depressed in order to restart the pump and
reset the 20 second time delay.
9
High Refrigerant Pressure
If the compressor discharge refrigerant pressure exceeds the setting on the high refrigerant pressure safety, the
compressor and pump will shut off and the High Refrigerant Pressure LED will be illuminated. Pressing the Alarm Reset
button will reset the High Refrigerant Pressure fault, as long as the High Refrigerant Pressure switch located at the
discharge of the compressor has been manually reset.
Low Refrigerant Pressure
If the compressor suction pressure drops below the setting on the low refrigerant pressure safety, the compressor will shut
off, the pump will remain running, and the Low Refrigerant Pressure LED will be illuminated. Pressing the Alarm Reset
button will reset the Low Refrigerant Pressure fault, as long as the refrigerant pressure has risen back up above the safety's
cutout level.
Freezestat
If the coolant temperature being delivered to the process drops below the setting on the Freezestat, the compressor will
shut off, the pump will remain running, and the Freezestat LED will be illuminated. The Freezestat should be set 10°F (5°C)
above the freezing point of the glycol solution and 10°F (5°C) below the minimum operating temperature. The Freezestat is
factory set at 38°F (3°C). In order to reset the Freezestat fault press the Alarm Reset button after resetting the mechanical
thermostat (labeled Freezestat) inside the electrical enclosure.
Low Oil Pressure
This LED is nonfunctional on standard units and will be activated only if the unit has been modified to include a low oil
pressure sensor (typical for semi-hermetic reciprocating compressor units). If the unit has a low oil pressure sensor and the
oil pressure in the compressor crankcase drops below the factory set level on the oil pressure switch, the compressor and
pump will shut off, and the Low Oil Pressure LED will be illuminated. In order to reset the Low Oil Pressure fault, press the
Alarm Reset button after resetting the mechanical pressure switch located inside of the cabinet near the Compressor.
Over Set Point
The Over Set Point LED will be illuminated if the To Process temperature exceeds the Set Point temperature by more than
5°F (3°C). This fault causes only an alarm indication (horn and/or remote contact) and the chiller will continue to operate.
Although the Over Set Point LED will turn on immediately whenever the temperature is out of range, the alarm relay is
disabled for 30 minutes after start-up or after a change in set point. The alarm will automatically clear when the To Process
temperature is no more that 5°F (3°C) above the Set Point temperature.
Under Set Point
The Under Set Point LED will be illuminated if the To Process temperature drops below the Set Point temperature by more
than 10°F (5°C). This fault will shut off the compressor, but the pump will continue to run. Although the Under Set Point LED
will turn on immediately whenever the temperature is out of range, the alarm relay is disabled for 30 minutes after start-up
or after a change in set point. Pressing the Alarm Reset button will reset this fault.
Pump On
The Pump On LED will be illuminated whenever the pump is running. If the pump is shut off due to a safety, the Pump On
LED will turn off. The Start button must be pressed in order to restart the pump.
10
Compressor On
The Compressor On LED will be illuminated whenever the compressor is running. The Compressor On LED will cycle on and
off with the compressor. The compressor will not come on unless the pump is already running and the To Process
temperature is above the Set Point temperature.
Note: During normal operation, the compressor may cycle on and off. An internal anti-cycle time delay will not allow the compressor to restart for 2.5
minutes after it has cycled off. For air cooled units the fans or blowers will cycle off with the compressor.
Partial Load
The Partial Load LED will be illuminated whenever the microprocessor energizes the hot gas bypass solenoid valve. This
valve is cycled in order for the chiller to maintain a constant To Process temperature even when there is only a partial load.
The longer that this LED stays on, the more unused excess capacity is available from the chiller. If the Partial Load LED stays
off, the chiller is fully loaded by the heat from the process. If the Partial Load LED stays on, the chiller has a very small load
on it from the process. If this low load condition persists, the To Process temperature may begin to drop below the Set
Point temperature, and when it reaches 5°F (3°C) below the Set Point temperature, the compressor will cycle off. The
compressor will come back on when the To Process temperature rises back up to the Set Point temperature and the anticycle 2.5 minute time delay relay has timed out.
Water Make-Up
This LED is nonfunctional on standard units and will be active only if the Water Make-Up option has been purchased. When
the water level in the reservoir drops below the lower limit of the float switch, the water make-up solenoid valve is opened
and the Water Make-Up LED is illuminated. When the water level rises to the upper limit of the float switch, the water
make-up solenoid is closed and the Water Make-Up LED turns off. The microprocessor will also close the water make-up
solenoid valve if it has been open for 10 minutes. This is done to help prevent further problems if a water leak has
developed in the system. If this occurs, the Water Make-Up LED turns off and the Low Water Level LED remains illuminated.
Low Water Level
This LED is nonfunctional on standard units and will only be active if the Low Water Level option or the Water Make-Up
option has been purchased. When the water level in the reservoir drops below the lower limit of the float switch, the Low
Water Level LED is illuminated. When the water level rises to the upper limit of the float switch, the Low Water Level LED
will shut off.
High Water Temperature
The High Water Temperature LED will be illuminated if the To Process temperature rises more than 10°F (or 5°C) above the
Set Point temperature. The High Water Temperature LED will turn off when the water temperature is less than 10°F (or 5°C)
above the Set Point temperature. This fault will not stop operation of the chiller.
Probe Fault
The Probe Fault LED will illuminate if the signal from the thermocouple is out of tolerance. This fault will also shut off the
compressor and the pump. Pressing the Alarm Reset button will reset this alarm.
11
Changing Temperature Display Scale
This unit was shipped to display temperatures in either °F or °C. The following step can be followed to determine what
temperature scale is in use and will provide instructions as to how to change from one scale to another.
1.
With the power connected and the control power off, hold down the Stop button. While holding the Stop button down,
press the Power button. When the controller illuminates, release both buttons.
2.
The To Process display will read "Unt". The Set Point display will show either "F" or "C" depending on the current
display units selected. If "F" is displayed the temperature display is in °F mode. If "C" is displayed the temperature
display is in °C mode.
3.
To change from °F to °C press the Lower Set Point Temperature button. To change from °C to °F press the Raise Set
Point Temperature button.
4.
The Set Point display now indicates the desired display units.
5.
Press and release the Start button to store the new selection into the controller memory.
6.
Press and release the Power button once to exit the function. Press and release the Power button again to restore
controller power.
12
Diagnostic Error Codes
Several different error codes may be displayed on the digital readouts labeled To Process and Set Point. Most of the
possible error codes indicate some type of failure in the microprocessor controller. Below is a list of the error codes. If there
are any error codes other than the one listed below, try to reset the unit by shutting the power off and then turning it back
on. If this does not work, make a note of the error code and contact our Customer Service Department for further
assistance.
Table 7 - Diagnostic Error Codes
Error
Description
Cause/Corrective Action
Brown Out Indication
The Pr Off code will be indicated on the display if the chiller is running and main power is discontinued or
drops more than 10% below the normal operating voltage, the unit will shut down and the Pr OFF fault will
be indicated on the digital displays. Pressing the Power button will clear this fault condition.
101
EEPROM Failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
102
A/D Converter Failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
103
Controller serial bus failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
105
CJC Error
Controller requires servicing. Contact Manufacturer for repair or replacement.
109
Unused memory byte changed
Controller requires servicing. Contact Manufacturer for repair or replacement.
110
Device or communication
configuration change or invalid
Controller requires servicing. Contact Manufacturer for repair or replacement.
111
Fixed parameter associated with
range invalid
Controller requires servicing. Contact Manufacturer for repair or replacement.
112
Setpoint out of temperature range Controller requires servicing. Contact Manufacturer for repair or replacement.
113
RAM hardware failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
114
Invalid device configuration
Controller requires servicing. Contact Manufacturer for repair or replacement.
117
Invalid program counter
Controller requires servicing. Contact Manufacturer for repair or replacement.
118
Infinite software loop detect
Controller requires servicing. Contact Manufacturer for repair or replacement.
119
Data direction register failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
120
Communication data register
failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
121
Timer data register failure
Controller requires servicing. Contact Manufacturer for repair or replacement.
122
Hardware watchdog data register
Controller requires servicing. Contact Manufacturer for repair or replacement.
failure
123
Option data register failure
125
Jumper for temperature controller The Err 125 fault code will be indicated on the digital displays if the jumper is loose or missing on the
missing
control circuit board.
126
Pump overload on chiller
The Err 126 fault code will be indicated on the digital displays if the pump overload has tripped. In order to
reset this fault; press the Alarm Reset button after resetting the pump overload inside the electrical
enclosure.
Compressor overload on chiller
The Err 127 fault code will be indicated on the digital display if the internal compressor motor winding
thermostat or the external compressor motor overload has tripped. This fault will also shut off the pump.
The internal compressor motor winding thermostat will automatically reset when the temperature drops
back into the normal operating range. The external compressor motor overload must be manually reset.
The compressor motor overload is located inside the electrical enclosure. Once the internal compressor
motor winding thermostat resets and/or the external compressor overload has been reset, press the
Alarm Reset button to reset the fault.
128
Chiller high temperature safety
The Err 128 fault code will be indicated on the digital displays if the chiller has been shut off due to the
high temperature safety. This safety will shut off both the pump and compressor. This safety is triggered if
the To Process temperature rises more than 10°F (5.5°C) above the maximum operating temperature for
that particular chiller. The maximum operating temperature for each chiller is noted on the nameplate.
The To Process temperature must be over the limit for three minutes before this safety will be triggered,
and the fault is defeated for a period of thirty minutes from the time the Start button is pressed or the Set
Point temperature is changed. Pressing the Alarm Reset button will reset this fault.
129
Input Contact Chatter
Pr Off
127
Controller requires servicing. Contact Manufacturer for repair or replacement.
13
Control Options
Return Water Temperature Display
This option allows the To Process digital display to indicate To Process or Return Water temperatures. To view the Return
Water temperature, hold down the Lower Set Point Temperature and Raise Set Point Temperature buttons simultaneously.
Once the buttons are released, the display will return to the To Process temperature.
Remote On/Off Contacts
This option allows the unit to be turned on and off via a remote contact closure. Two terminals are provided in the control
panel to be wired to a remote contact closure device. Switching the contacts from open to close simulates pressing the
Start button on the control panel. Switching the contacts from closed to open simulates pressing the Stop button. Please
note that the Remote On/Off contacts are nonfunctional until the Power button has been depressed and the control circuit
has been energized. This option also includes a remote/local toggle switch that allows the operator to disable the remote
contacts for safety purposes while the unit is being serviced.
Note: Do not introduce any external voltage to these contacts as this will result in damage to the microprocessor, which will not be covered by the
warranty.
Remote Alarm Contacts
This option includes a set of dry (no voltage induced by chiller), normally open contacts that will close when there is an
alarm condition. Refer to Table 6 for the Microprocessor Control Fault Logic to determine which faults will trigger the
Remote Alarm contacts. The contacts will reopen by clearing the fault or by pressing the Alarm Silence button.
Alarm Horn
This option includes an alarm horn that will be activated by certain faults. Refer to Table 6 for the Microprocessor Control
Fault Logic to determine which faults will trigger the Alarm Horn. The Alarm Horn will be silenced by clearing the fault or by
pressing the Alarm Silence button. If this option is selected in conjunction with the remote control panel, the Alarm Horn
will be mounted on the chiller and not the remote control panel.
Remote Control Panel
This option removes the display and control buttons from the chiller and places them in a small hand-held NEMA-1
enclosure. Included with this option is a 50 foot (15 M) cable to connect the controller and the chiller. All control functions
are available to the operator at the location of the remote panel and no control functions are available at the location of
the chiller.
SPI Communications
This option provides an RS-485 communication port located below the control panel on the front of the chiller. The serial
communications will be multi-drop, half duplex, SPI 3.01 compatible and will allows the unit to communicate with another
piece of equipment that also has SPI protocol capabilities.
The following SPI communications are supported by the microprocessor.
Process Temperature Set Point
High Temperature Deviation
Low Temperature Deviation
Process Status
To Process Temperature
The microprocessor is designed to accept inputs and deliver outputs according to SPI protocol. There must also be a
computer or another piece of equipment that is equipped with the SPI protocol in order for the communications from the
chiller to be of any use. The programming of this computer and/or other equipment is not the responsibility of the
manufacturer.
Note: The manufacturer is not responsible for SPI protocol programming beyond what is included in the microprocessor controller.
14
When the SPI option is purchased, there is a second set of DIP switches included on the back of the main control panel. This
set of DIP switches is labeled "COMM". All DIP switch adjustments that follow are to be made on the COMM set. Do not
adjust any DIP switches on the CONFIG set.
Note: All DIP switch changes must be made with power disconnected.
In order to activate the SPI protocol, DIP switch #8 must be set to the "On" position. To deactivate the SPI communication,
set DIP switch #8 to the "Off" position.
If more than one piece of equipment is going to be on the same communications network, the base address will have to be
changed so that each unit has a unique address. This is done by changing one or more of the DIP switches to the "Off"
position. The base address is 32 decimal. Changing these switches causes the following address change.
DIP Switch 1 OFF adds one to base address
DIP Switch 2 OFF adds two to base address
DIP Switch 3 OFF adds four to base address
DIP Switch 4 OFF adds eight to base address
DIP Switch 5 OFF adds sixteen to base address
The BAUD rate can be adjusted to the appropriate setting by using the information found in Table 8.
BAUD Rate
1200
2400
4800
9600
Table 8 - SPI Baud Rate Adjustment
DIP Switch #6
DIP Switch #7
ON
ON
Off
ON
ON
Off
Off
Off
Chiller Operation
Coolant Circuit
The pump draws coolant from the reservoir and circulates it through the evaporator. It is in the evaporator where the heat
is transferred from the coolant to the refrigerant. The temperature of the coolant being delivered to the process is
controlled by adjusting the amount of heat transferred in the evaporator.
After leaving the evaporator, the coolant passes the Freezestat and thermocouple. The Freezestat is a safety control that is
connected to the microprocessor. The thermocouple senses the temperature of the coolant being delivered to process and
communicates this temperature to the microprocessor.
The coolant then exits the unit through the process water supply connection on the back of the chiller. It is delivered out to
the process where it picks up heat and returns to the process return connection. From this connection, the coolant passes
the Flow Switch and returns to the reservoir thereby completing the cycle. The Flow Switch is a safety control that is
connected to the microprocessor.
A small coolant bypass line runs between the supply and return manifolds. This line allows the chiller to operate with
sufficient flow through the evaporator even if the flow is restricted or completely shut off through the process. The bypass
line is a hose that runs from the process supply line directly back into the reservoir. There is a ball valve located in this line
where it tees into the supply line. This valve can be adjusted depending on how much flow is required by the process.
Note: Closing this valve off too far may result in a situation that could damage components in the chiller. The main purpose of the bypass line is to
avoid deadheading of the pump and reduce the possibility of an evaporator freeze-up.
Refrigerant Circuit
The heat that is transferred in the evaporator from the coolant to the refrigerant is used to change the state of the
refrigerant from a liquid to a gas. After leaving the evaporator, the refrigerant passes to the compressor.
15
The compressor is the heart of the refrigeration circuit. It takes the cool, low-pressure gas entering the compressor and
compresses it, which creates the hot, high-pressure gas that exits the compressor. Since the compressor is not 100%
efficient, some extra heat is added to the refrigerant as it is being compressed.
The hot, high-pressure gas that exits the compressor is delivered to the condenser. In the condenser, the heat is transferred
from the refrigerant into the air or water that is passing through the condenser. As the heat is transferred, the refrigerant
changes from a gas to a liquid. The condenser has been sized to remove the heat from the process load and the heat that
was added by the compressor.
After leaving the condenser, the liquid refrigerant passes through the service ball valve, filter drier and sight glass. The filter
drier removes any particles or moisture from the refrigerant. The sight glass is used to monitor the stream of liquid
refrigerant. The liquid refrigerant then passes through the thermal expansion valve (TXV) which meters the flow into the
evaporator where the process starts all over again.
Capacity and temperature control is accomplished with a hot gas bypass system. If the chiller were catering to a partial load
from the process, the coolant supply temperature would normally tend to drop. The microprocessor senses this drop in
temperature, and opens the hot gas bypass solenoid valve. When this valve is open, some of the hot compressor discharge
gas is directed to the inlet of the evaporator instead of going through the condenser. This reduces the chillers cooling
capacity and puts an additional heat load on the evaporator, which brings the coolant temperature back up to set point.
The microprocessor cycles the hot gas solenoid valve as is needed to maintain the coolant temperature to within 1°F (1°C)
of the set point even with loads as low as 10% to 25% of full capacity.
If the process heat load is extremely low, or even nonexistent, the hot gas bypass system may not be able to put enough of
a load on the evaporator, and the coolant temperature will begin to drop. When the coolant temperature drops 5°F (3°C)
below the set point temperature, the controller will shut the compressor off. When the coolant temperature rises back to
the set point temperature, the compressor comes back on. The compressor will remain off for at least two minutes to
prevent short cycling.
Chiller Construction
Compressor
The chiller is equipped with a hermetic scroll compressor. Both the compressor and the motor are encased together and
solidly mounted in the cabinet. The compressor is unidirectional and will only pump refrigerant when properly phased. The
cool refrigerant suction gas cools the motor windings, and there is an internal thermal overload to protect the windings
from overheating. The compressor is lubricated with oil that travels throughout the system with the refrigerant.
Air Cooled Condenser
The condenser is provided on all air cooled condenser models and are constructed of heavy gauge copper tubing and
aluminum fins for maximum heat transfer capabilities. The condenser has been generously sized so the chiller can operate
with full cooling capacities in ambient air temperatures of up to 95°F (35°C). When the ambient air temperatures are above
95°F (35°C) the chiller will lose approximately 1% of its cooling capacity per 1°F (0.5°C) above 95°F (35°C). The chiller should
be able to operate with ambient temperatures of up to 105°F (41°C).
The fan(s) draw cool air through the condensers and discharges warm air out the top of the cabinet. The unit is designed to
draw sufficient air through the chiller as long as there are no obstructions. The fans are not designed to draw air through
ductwork or discharge air through ductwork. The discharge air will be approximately 35°F (20°C) warmer than the intake
air.
Water Cooled Condenser
The water cooled condenser is provided on all water cooler condenser models and is a horizontal tube-in-tube type
constructed of a steel outer tube with removable end plates and enhanced copper inner tubes. The condenser water passes
through the copper inner tubes, while the refrigerant passes around the tubes, in the outer steel tube.
Condenser Water Regulating Valve
A condenser water regulating valve is provided on all water cooled condenser models. This valve is located in the condenser
water piping at the inlet of the condenser. It regulates the flow of water through the condenser in order to maintain the
16
high-pressure side of the refrigeration circuit. This valve is set at the factory and should only be adjusted by a qualified
refrigeration technician. The valve only passes as much water as is required to maintain the refrigerant pressure, so less
water will be required if the water temperature is lower than the design 85°F (29°C).
Note: The condenser water regulating valve may not completely shut-off water flow when the chiller is not operating. If flow must be completely
stopped for any reason, a shut-off valve (manufactured by others) must be used. Make sure the shut-off valve is reopened before restarting the chiller.
Remote Air-Cooled Condenser
A remote air cooled condenser is provide with all remote air cooled condenser models. The remote air cooled condenser
has a copper tube and aluminum fin coil with multiple fans. The refrigerant passes through the copper tubes, while the air
passes over the fins. The condenser supplied is equipped to vary the header fan(s) speed and operate the remaining fans as
needed to control the refrigerant discharge pressure under varying ambient and chiller loading conditions. Please see the
air-cooled remote condenser installation instructions for proper mounting and connection of the condenser.
Evaporator
The evaporator is constructed of stainless steel plates and copper brazing. The refrigerant passes between every other set
of plates, while the coolant flows on the other side of the plates in the opposite direction.
Thermostatic Expansion Valve (TXV)
The TXV separates the high pressure/high temperature side of the refrigeration circuit (the condenser side) from the low
pressure/low temperature side of the refrigeration circuit (the evaporator side). The TXV maintains constant superheat at
the evaporator outlet, regardless of process load, by precisely metering the amount of refrigerant into the evaporator.
Superheat is the difference between the saturated evaporative temperature and the actual measured temperature at the
TXV sensor bulb. The superheat is factory set for 10°F to 12°F (5°C to 6°C) and should never exceed 15°F (8°C). Only a
trained refrigeration technician should adjust this valve.
Refrigerant Sight Glass
The refrigerant sight glass is located in the liquid line immediately ahead of the expansion valve. It allows the operator or
service technician to observe the flow of liquid refrigerant. Prolonged periods of foaming in the sight glass may indicate a
low refrigerant condition or a restriction in the liquid line.
Note: Occasional bubbling in the sight glass may occur at a time when load conditions are changing and the thermostatic expansion valve is adjusting
to the new conditions. This momentary occurrence is a result of normal chiller operation.
The sight glass can also be used to check if there is moisture in the refrigeration system. If there is moisture in the system,
the green dot in the center of the sight glass will turn yellow. If this occurs, the chiller should be serviced immediately.
Refrigerant Filter Drier
The filter drier is located in the liquid line between the condenser and the refrigerant sight glass. It is designed to remove
any moisture and/or foreign matter that may have gotten into the refrigerant stream. Moisture and foreign matter can
cause serious damage to the components of a refrigeration system. For this reason, it is important that the chiller be
equipped with a clean filter drier. Replace the filter drier if any of the following conditions occur.
1.
2.
The refrigeration system is opened to the atmosphere for repairs or maintenance.
Moisture is indicated in the sight glass (the green dot has changed to yellow).
3.
An excessive pressure drop develops across the filter drier. This is indicated by a significant temperature difference
between the filter inlet and outlet.
Fusible Plug
The Fusible Plug is located in the liquid line after the condenser. It is designed to relieve refrigerant pressure under severe
conditions in order to protect the refrigeration circuit components from damage.
Hot Gas Bypass Valve
This valve is located in the refrigerant line that runs from the compressor discharge to the evaporator inlet. It is designed to
artificially load the chiller when the chiller is catering to a partial load from the process. This is accomplished by directing
some of the hot compressor discharge gas directly back into the evaporator instead of going through the condenser. The
17
microprocessor controller controls the amount of hot gas used. Eliminating cycling of the compressor is extremely desirable
as it significantly extends its lifetime expectancy.
Reservoir
The reservoir is mounted to the inside of the cabinet. The reservoir is made of polyethylene and is fully insulated. A level
glass is included so the coolant level can be observed. There is a removable cover on the top of the reservoir. During chiller
operation the reservoir should be at least half full. For most installations the reservoir has sufficient capacity to handle
coolant drain back from the process equipment which occurs during chiller shut down. For installations with overhead
piping runs of over 90 feet (27 M) special precautions will have to be made during installation (see Installation Section,
Figure 1).
Note: The reservoir cannot be pressurized. Modifications to the chiller that would result in pressurization of the reservoir will void the warranty.
Coolant Pump
The close-coupled centrifugal pump is equipped with a mechanical seal and is constructed of stainless steel. The pump is
factory tested for the specified operating conditions. The pump motor meets NEMA specifications and industry standards.
Pressure Gauge
A pressure gauge is mounted on the back panel of the chiller. This gauge displays the pressure of the coolant at the
discharge of the pump. It can be used to determine the approximate point on the pump curve in which the pump is
operating.
Y-Strainer
A Y-strainer with a 20-mesh screen is installed in the water line to help protect the evaporator passages from becoming
clogged.
High Refrigerant Pressure Switch
The High Refrigerant Pressure switch is designed to limit the compressor discharge pressure within the design parameters
of the compressor. The switch is located on the discharge side of the compressor and can be reset by first pressing the
manual reset button located on the High Refrigerant Pressure safety switch and then by pressing the Alarm Reset button on
2
the control panel. The setting on this switch is set to cut out at 375 PSIG (26 Kg/cm ) for air cooled units or 300 PSIG (21
2
Kg/cm ) for water cooled units.
Low Refrigerant Pressure Switch
The Low Refrigerant Pressure switch is designed to limit the compressor suction pressure to within the designed
parameters of the compressor. The switch is located in the suction side of the compressor and can be reset by pressing the
2
Alarm Reset button on the control panel. The setting on this switch is set to cut out at 35 PSIG (2.5 Kg/cm ) and cut in at 60
2
PSIG (4.2 Kg/cm ).
Freezestat
The freezestat control is an electronic thermostat that senses the coolant temperature separately from the microprocessor
controller. This safety is designed to limit the temperature of the coolant leaving the evaporator and prevent possible
freeze-up situations. This control should be set 10°F (5°C) below the minimum coolant supply temperature, and there
should be a sufficient glycol concentration for 10°F (5°C) below the freezestat setting.
Note: It is critical that the freezestat is set properly and that there is sufficient glycol in the system to correspond with the freezestat setting. Freeze-ups
can cause extensive damage to several components in the chiller, and the warranty does not cover repairs required due to a freeze-up.
The Freezestat is located inside the main electrical enclosure. If the chiller shuts down due to the Freezestat, the Alarm
Reset button on the control panel must be pressed before the chiller can be restarted.
Coolant Flow Switch
This switch is located in the water piping in the return manifold. It is designed to shut the unit down if there is insufficient
coolant flow through the evaporator. The switch is adjustable; however, no adjustments should be made without prior
approval from the factory. If the chiller shuts down due to low coolant flow, pressing the Start button on the control panel
can restart it. This switch is disabled for 20 seconds after the Start button is pressed so that the pump can develop flow and
make the switch.
18
Automatic Water Make-Up (Optional)
With this option, a water supply can be connected to the chiller so that the water level in the reservoir is automatically
maintained. When the water level in the reservoir drops below the low level on the float switch, a solenoid valve will be
opened to allow fresh water into the system. When the water level reaches the high level on the float switch, the solenoid
valve is closed.
Note: This option is not normally recommended for systems that depend on a glycol solution to prevent freeze-ups. Automatic water make-up may
cause reduction of the glycol concentration, which may result in an evaporator freeze-up.
Upgraded Pumps (Optional)
The standard pumps that have been selected for each size chiller will meet the requirements of most applications;
however, in certain instances, larger pumps may be required to provide the desired flow and pressure for a specific
application. The horsepower of the pump will be indicated on the chiller nameplate.
Preventive Maintenance
Once your portable chiller has been placed into service, the following maintenance procedures should be adhered to as
closely as possible. The importance of a properly established preventive maintenance program cannot be overemphasized.
Taking the time to follow these simple procedures will result in substantially reduced downtime, reduced repair costs, and
an extended useful lifetime for the chiller. Any monetary costs of implementing these procedures will almost always more
than pay for it.
To make this as simple as possible, a checklist should be prepared which lists the recommended service operations and the
times at which they are to be performed. At the end of this section we have included a checklist that can be used for this
purpose. Notice that there are locations for voltage readings, amperages, etc. so that they can be monitored over time.
With this information, maintenance personnel may be able to correct a potential problem before it causes any downtime.
For best results, these readings should be taken with a full heat load from process, preferably with similar operating
conditions each time. The following is a list of suggested periodic maintenance.
Once a Week
1.
(Air Cooled Units Only) Check the surface of the air cooled condenser coil for dirt and debris. To clean, rinse thoroughly
with water. Mild detergent can be used to remove smoke and or grease stains.
2.
Check to make sure that the To Process temperature is maintained reasonably close to the Set Point temperature. If
the temperature stays more than 5°F (3°C) away from the set point, there may be a problem with the chiller. If this is
the case, refer to the Troubleshooting Chart or contact the Customer Service Department.
3.
Check the pump discharge pressure on the gauge on the back panel of the chiller. Investigate further if the pressure
starts to stray away from the normal operating pressure.
4.
Check the coolant level in the reservoir. Replenish if necessary making sure to take proper precautions to maintain the
appropriate glycol concentration.
5.
Check coolant circulation pump for leaks in the seal area. Replace pump seal if necessary.
6.
Check refrigerant sight glass for air bubbles or moisture indication. If the sight glass indicates that there is a
refrigeration problem, have the unit serviced as soon as possible.
Once a Month
Repeat items 1 through 6 as listed above and continue with the following.
7.
With the main disconnect shut off and locked out, check the condition of electrical connections at all contactors,
starters and controls. Check for loose or frayed wires.
8.
Check the incoming voltage to make sure it is within 10% of the design voltage for the chiller.
19
9.
Check the amp draws to each leg of the compressor, (fans or blowers on air cooled units) and pump to confirm that
they are drawing the proper current.
Every Three Months
Repeat items 1 through 9 listed above and continue with the following.
10. Units are equipped with a Y-strainer between the return connection and the evaporator inlet. The strainer basket
should be removed and cleaned if necessary. This may be required more often if contaminants can easily get into the
process water.
11. Have a qualified refrigeration technician inspect the operation of the entire unit to ensure that everything is operating
properly. Have condenser cleaned out if necessary.
20
Preventive Maintenance Checklist
Model # ___________________________
Serial # ___________________________
Maintenance
Activity
Week Number
1
2
3
4
5
6
7
8
9
10
11
12
13
Date
Clean Condenser Coil and Inlet
Filter (air cooled units)
Temperature Control
Pump Discharge Pressure
Coolant Level
Glycol Concentration
Pump Seal
Refrigerant Sight Glass
Electrical Connections
Incoming Voltage
Compressor L1 Amps
Compressor L2 Amps
Compressor L3 Amps
Pump L1 Amps
Pump L2 Amps
Pump L3 Amps
Fan A L1 Amps
Fan A L2 Amps
Fan A L3 Amps
Fan B L1 Amps
Fan B L2 Amps
Fan B L3 Amps
Clean Y-Strainer
Refrigerant Circuit Check
Refrigerant Suction Pressure
Refrigerant Discharge Pressure
Refrigerant Superheat
21
Troubleshooting
Problem
Possible Cause
Remedy
Compressor overload
Check supply voltage, amperage of each leg, contactor and
wiring, overload set point
Compressor contactor
Replace if faulty
Microprocessor control board
Replace if faulty
Compressor failure
Contact Customer Service Department for assistance
Pump overload
Check supply voltage, amperage of each leg, contactor and
wiring, overload set point
Pump contactor
Replace if faulty
Microprocessor control board
Replace if faulty
Pump failure
Replace if faulty
Low refrigerant charge
Contact refrigeration service technician
Refrigerant leak
Contact refrigeration service technician
Low refrigeration pressure sensor
Check for proper range, replace if faulty
Microprocessor control board
Replace if faulty
Dirty air filters (air cooled units only)
Clean filters
Air flow obstruction (air cooled units only)
Make sure chiller is installed in accordance with
recommendations in this manual
High ambient air temperature (air cooled units
only)
Ambient temperature must be reduced below 110°F (43°C)
Condenser fan motor (air cooled units only)
Replace if faulty
Condenser fan cycling control (air cooled units
only)
Confirm proper operation, replace if faulty
Plugged condenser (water cooled units only)
Clean out tubes
Insufficient condenser water flow (water
cooled units only)
Make sure chiller is installed in accordance with the
recommendations of this manual
High condenser water temperature (water
cooled units only)
Condenser water temperature must be reduced below 100°F
(38°C)
Condenser water regulating valve
Check setting, replace if faulty
Refrigerant circuit overcharged
Contact refrigeration service technician
High refrigerant pressure sensor
Replace if faulty
Microprocessor control board
Replace if faulty
Compressor will not start
Pump will not start
Low refrigerant pressure
High refrigerant pressure
22
Problem
Possible Cause
Remedy
Low flow through evaporator
Adjust flow to proper level
Freezestat control module
Check for proper setting, replace if faulty
Microprocessor control board
Replace if faulty
Freezestat sensor
Replace if faulty
Pump running backwards
Switch 2 legs of the incoming power
Pump pressure gauge
Replace if faulty
Pump failure
Replace if faulty
Excessive flow
Reduce flow
Closed valves in process piping
Open valves
Obstruction in piping or process
Remove obstruction
Clogged Y-strainer
Clean strainer
Pressure gauge
Replace if faulty
Low coolant flow through evaporator
Adjust flow to proper level
Intermittent overloading of chiller capacity
Check to make sure chiller is properly sized for
process load
Hot gas bypass valve
Contact refrigeration service technician
Microprocessor control board
Replace if faulty
Thermocouple
Replace if faulty
Process load too high
Check to make sure chiller is properly sized for
process load
Coolant flow through evaporator too high or
too low
Adjust flow to proper level
Insufficient condenser cooling
See “High Refrigerant Pressure”
Hot gas bypass valve stuck open
Contact refrigeration service technician
Refrigeration circuit problem
Contact refrigeration service technician
Microprocessor control board
Replace if faulty
Thermocouple
Replace if faulty
Freezestat
Low pump discharge pressure
High pump discharge pressure
Erratic temperature control
Insufficient cooling (temperature continues to
rise above set point)
23
Charts and Drawings
Table 9 - SQ2A05, SQR05, SQ2W05, SQ2A08 & SQ2W08 Electrical Specifications
Model
Pump Hp
Compressor
Voltage
Qty
1½
SQ2A05
3
3
2-stage
1½
SQ2R05
SQ2W05
3
3
2-stage
1½
3
3
2-stage
SQ2A08
5
5
2-stage
7½
1½
3
SQ2R08
SQ2W08
3
2-stage
5
5
2-stage
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
RLA
18.9
9.5
7.5
18.9
9.5
7.5
18.9
9.5
7.5
18.9
9.5
7.5
18.9
9.5
7.5
18.9
9.5
7.5
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
24.9
11.2
9.0
Pump
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Condensers
FLA
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
15.0
7.5
6.0
15.0
7.5
6.0
22.0
11.0
8.8
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
15.0
7.5
6.0
15.0
7.5
6.0
Qty
HP
1
3/4
1
3/4
1
3/4
-
-
-
-
-
-
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
-
-
-
-
-
-
-
-
-
-
Unit MCA
FLA
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
-
32.8
17.0
14.1
37.0
19.1
15.7
37.0
19.1
15.7
29.4
15.3
12.4
33.6
17.4
14.0
33.6
17.4
14.0
43.7
20.8
17.7
47.9
22.9
19.3
47.9
22.9
19.3
53.9
25.9
21.7
53.9
25.9
21.7
60.9
29.4
24.5
36.9
17.4
14.3
41.1
19.5
15.9
41.1
19.5
15.9
47.1
22.5
18.3
47.1
22.5
18.3
Notes:
1. RLA (Rated Load Amps) based on a percentage of the MMTC (Maximum Must Trip Current) as established by the manufacturer in accordance with UL
Standard 465.
2. MCA (Minimum Circuit Ampacity) based on 125% of the compressor RLA plus 100% of remaining components FLA in accordance with NEC 440-33.
MCA shown also include 1 amp value for the control circuit.
3. Voltage Utilization range is: 230 (207 to 254), 460 (414 to 506) and 575 (516 to 633).
24
Table 10 - SQ2A10, SQ2R10, SQ2W10, & SQ2A14 Electrical Specifications
Model
Pump Hp
Compressor
Voltage
Qty
1½
3
3
2-stage
SQ2A10
5
5
2-stage
7½
1½
3
SQ2R10
SQ2W10
3
2-stage
5
5
2-stage
1½
3
3
2-stage
SQ2A14
5
5
2-stage
7½
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
230
460
575
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
RLA
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
31.7
15.8
12.4
62.2
27.6
22.1
62.2
27.6
22.1
62.2
27.6
22.1
62.2
27.6
22.1
62.2
27.6
22.1
62.2
27.6
22.1
Pump
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Condenser Fans
FLA
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
15.0
7.5
6.0
15.0
7.5
6.0
22.0
11.0
8.8
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
15.0
7.5
6.0
15.0
7.5
6.0
4.8
2.4
2.0
9.0
4.5
3.6
9.0
4.5
3.6
15.0
7.5
6.0
15.0
7.5
6.0
22.0
11.0
8.8
Qty
HP
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
-
-
-
-
-
-
-
-
-
-
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
2
3/4
Unit MCA
FLA
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
3.4
1.7
1.7
52.2
26.6
21.9
56.4
28.7
23.5
56.4
28.7
23.5
62.4
31.7
25.9
62.4
31.7
25.9
69.4
35.2
28.7
45.4
23.2
18.5
49.6
25.3
20.1
49.6
25.3
20.1
55.6
28.3
22.5
55.6
28.3
22.5
90.4
41.3
34.0
94.6
43.4
35.6
94.6
43.4
35.6
100.6
46.4
38.0
100.6
46.4
38.0
107.6
49.9
40.8
Notes:
1. RLA (Rated Load Amps) based on a percentage of the MMTC (Maximum Must Trip Current) as established by the manufacturer in accordance with UL
Standard 465.
2. MCA (Minimum Circuit Ampacity) based on 125% of the compressor RLA plus 100% of remaining components FLA plus 1 amp for the control circuit.
3. Voltage Utilization range is: 230 (207 to 254), 460 (414 to 508) and 575 (518 to 635).
25
Figure 2 - 60 Hz Pump Curves
Pump Curves (60 Hz)
Pump Flow (L/min)
0
50
100
150
200
250
300
350
400
450
500
550
600
120.0
280
110.0
260
Pump Pressure (PSI)
220
90.0
200
80.0
5 HP 2-Stage
180
70.0
160
60.0
140
120
3 HP 2-Stage
50.0
100
40.0
5 HP
30.0
80
3 HP
60
7½ HP
20.0
40
1½ HP
10.0
20
0.0
0
0
20
40
60
80
Pump Flow (GPM)
26
100
120
140
160
Pump Pressure (FT HD)
240
100.0
Warranty
Thermal Care warrants its equipment to be free from defects in material and workmanship when used under recommended
operating conditions.
Thermal Care's obligation is limited to repair (i.e. rewind a motor) or replacement (not adjustment or maintenance), F.O.B. the
factory of any parts supplied by Thermal Care within a period as shown below from the date of shipment to the original purchaser.
Model
SQ, LQ, NQ
EQ
EQR, LQR, SQR, NQR(remote condensers)
TCW, TSW, MXW,
TCR, TSR, MXR (remote condensers)
Optional Compressor Warranty
Chilled Water Systems
FT or FC Tower Systems
FT Cooling Tower
FC Cooling Tower
RA, RB, RQ
All other products
Parts
18 months
12 months
12 months
12 months
12 months
5 years
See note3
See note3
12 months (10 years - shell)
5 years (10 years - shell)
(See Warranty Sheet - Form 1-415.7 or 1-416.2)
12 months
Labor1
12 months
12 months
12 months2
12 months
12 months2
12 months4
12 months4
1
Continental U.S.A., Canada, and Puerto Rico only.
Refrigerant and any labor associated with its evacuation or replacement are not covered for remote condenser systems.
3
See individual product listing for parts warranty coverage.
4
The labor warranty covers all equipment purchased at the same time consisting of a minimum of at least one pumping system
and one cooling tower and/or chiller.
2
This warranty does not cover the cost of labor during overtime hours (after normal working hours or during weekends and
holidays). Any cost differential for overtime labor will be the responsibility of the customer. Thermal Care is not responsible for
any sales, use, excise or other applicable taxes associated with the replacement of parts under this warranty. This warranty will be
voided when, in Thermal Care's opinion, the equipment and/or system has been subject to misuse, negligence or operation in
excess of recommended limits, including freezing, or has been altered, and/or repaired without express factory authorization. If
equipment is installed in hostile environments, unless such conditions were specified at the time of purchase; or the serial number
has been removed or defaced, this warranty shall not apply. All labor warranty coverage provided by the Seller is based on normal
ground mounted equipment with proper clearance and equipment access. The Buyer is responsible for any additional costs
associated with special rigging or access platforms required to perform the warranty work and/or any additional labor cost
associated with delays caused by the Buyer which prevent the Seller's service technician from performing their repair work in a
proper timely manner. This warranty is not transferable.
Under no circumstances shall Thermal Care be liable for loss of prospective or speculative profits, or special, indirect, incidental or
consequential damages.
Thermal Care must authorize all warranty service prior to work being performed and have a Thermal Care purchase order issued.
All defective parts become the property of Thermal Care and must be returned as advised by Thermal Care.
Thermal Care neither assumes, nor authorizes any person to assume for it, any liability not expressed in this warranty. There is an
implied warranty of merchantability and of fitness for that particular purpose; all other implied warranties, and any liability not
based upon contract are hereby disclaimed and excluded by this warranty. This warranty is part of the standard conditions and
terms of sale of Thermal Care.
7720 N. Lehigh Avenue
Niles, Illinois 60714-3491
Phone: (847) 966-2260
(888) 828-7387
Fax: (847) 966-9358
Email: info@thermalcare.com
www.thermalcare.com
Customer Service
Phone: (847) 966-2636
Fax: (847) 966-2906
Form 1-410.13
Effective 9/15/11
27
Thermal Care, Inc.
7720 North Lehigh Ave.
Niles, IL 60714-3491
www.thermalcare.com
SQ Series IOM 2-316.20
September 2014
New Equipment Sales
Phone
(847) 966-2260
Fax
(847) 966-9358
Email
info@thermalcare.com
Customer Service
Phone
(847) 966-2636
Fax
(847) 966-2906
Email
service@thermalcare.com
Parts
Phone
Fax
Email
(847) 966-8560
(847) 966-6065
tcparts@thermalcare.com