nvent WCHE Series Bedienungsanleitung
© 2018 nVent 89087984
Rev. J P/N 89087983
Air-To-WATer HeAT excHAngers
WcHe Models
INSTRUCTION MANUAL
© 2018 nVent 89087984
- 2 -
NOTE: Please read this manual carefully before installing the unit. This user manual is an
integral part of the product and should accompany it until it is eventually disassembled.
TABLE OF CONTENTS
HOW TO CONSULT THIS MANUAL ........................................................................................................................................................... 2
THIS MANUAL IS INTENDED FOR THE FOLLOWING:............................................................................................................................................... 3
PURPOSE OF THE INFORMATION CONTAINED IN THIS MANUAL:........................................................................................................................ 3
RESTRICTIONS TO THE USE OF THIS MANUAL....................................................................................................................................................... 3
WHERE AND HOW TO STORE THIS MANUAL........................................................................................................................................................... 3
CURRENT TECHNOLOGY ............................................................................................................................................................................................ 3
UPDATES ...................................................................................................................................................................................................................... 3
IN THE EVENT OF SALE OF THE PRODUCT .............................................................................................................................................................. 3
UNPACKING AND INSPECTION................................................................................................................................................................. 4
Included in the carton:................................................................................................................................................................................................. 4
UNIT IDENTIFICATION................................................................................................................................................................................................. 4
SAFETY REMARKS ..................................................................................................................................................................................... 5
PRECAUTIONS WHEN HANDLING THE UNIT ........................................................................................................................................................... 5
OPERATING PRINCIPLE ............................................................................................................................................................................. 6
COOLING CAPACITY.................................................................................................................................................................................................... 7
Performance Data WCHE019 Series.......................................................................................................................................................................... 7
Design Data WCHE019 Series................................................................................................................................................................... 8
Performance Data WCHE049 Series.......................................................................................................................................................................... 9
Design Data WCHE049 Series.................................................................................................................................................................10
Performance Data WCHE069 Series........................................................................................................................................................................ 11
Design Data WCHE069 Series.................................................................................................................................................................12
Performance Data WCHE149 Series........................................................................................................................................................................ 13
Design Data WCHE149 Series.................................................................................................................................................................14
INSTALLATION INSTRUCTIONS..............................................................................................................................................................15
Installation.................................................................................................................................................................................................................. 15
WATER CONNECTIONS.............................................................................................................................................................................................16
MECHANICAL PARTS...............................................................................................................................................................................18
STRUCTURE................................................................................................................................................................................................................18
HEAT EXCHANGE BANK ...........................................................................................................................................................................................18
CONDENSATE COLLECTION BASIN.........................................................................................................................................................................18
FLOW CONTROL SOLENOID VALVE.........................................................................................................................................................................18
MOTORS .................................................................................................................................................................................................... 19
FANS............................................................................................................................................................................................................................ 19
CONTROL, MONITORING AND SAFETY COMPONENTS ......................................................................................................................19
REGULATING THERMOSTAT FOR SOLENOID VALVE.............................................................................................................................................19
Adjustments.......................................................................................................................................................................................... 19
ELECTRICAL CONNECTIONS ..................................................................................................................................................................20
WCHE019 only ........................................................................................................................................................................................................... 20
WCHE049, WCHE069, WCHE149 ............................................................................................................................................................................. 21
START-UP................................................................................................................................................................................................... 21
TEMPERATURE CONTROL.......................................................................................................................................................................21
PRELIMINARY CHECKS AFTER STARTING THE UNIT ..........................................................................................................................21
TURNING OFF THE UNIT.......................................................................................................................................................................... 21
MAINTENANCE......................................................................................................................................................................................... 22
PREVENTATIVE MAINTENANCE SCHEDULE..........................................................................................................................................................22
Twice a year .......................................................................................................................................................................................... 22
Annually................................................................................................................................................................................................. 22
REPLACEMENT OF COMPONENTS.................................................................................................................................................... 22
HOW TO CLEAN THE UNIT .................................................................................................................................................................. 22
INACTIVITY ........................................................................................................................................................................................... 22
INFORMATION ON RESIDUAL HAZARDS AND EMERGENCY SITUATIONS ........................................................................................23
GENERAL SAFETY PROVISIONS ......................................................................................................................................................... 23
HAZARDS ARISING FROM THE PRODUCT COMING INTO CONTACT WITH THINGS OR PERSONS.................................................................23
SAFETY STANDARDS FOR ELECTRICAL EQUIPMENT...........................................................................................................................................23
Introduction........................................................................................................................................................................................... 23
TASKS ASSIGNED TO OFFICERS-IN-CHARGE.........................................................................................................................................................23
HIGH VOLTAGE...........................................................................................................................................................................................................23
SAFETY STANDARDS TO COMPLY WITH WHEN THE EQUIPMENT IS TURNED OFF .........................................................................................24
SAFETY STANDARDS TO COMPLY WITH WHEN SERVICING LIVE EQUIPMENT ................................................................................................24
SAFETY STANDARDS TO COMPLY WITH WHEN SERVICING THE UNIT..............................................................................................................24
FIRE HAZARDS...........................................................................................................................................................................................................24
TOXIC SUBSTANCES .................................................................................................................................................................................................24
DANGERS ARISING FROM FLUIDS........................................................................................................................................................................... 24
DISASSEMBLING THE UNIT.....................................................................................................................................................................25
TROUBLE SHOOTING ...............................................................................................................................................................................26
Symptoms and Possible Causes:............................................................................................................................................................................. 26
Replacement Parts .................................................................................................................................................................................................... 27
WARRANTY ............................................................................................................................................................................................... 30
RETURN AND REPAIR POLICY.................................................................................................................................................................................. 30
LIMITATION OF LIABILITY......................................................................................................................................................................................... 31
© 2018 nVent
89087984 - 3 -
HOW TO CONSULT THIS MANUAL
This document contains general information applicable to all models. In the event of any information updates
becoming necessary, such updates shall be inserted in the enclosures.
THIS MANUAL IS INTENDED FOR THE FOLLOWING:
• Owner of the appliance
• Person responsible for its installation
• Person responsible for managing the product
• Person responsible for ordinary maintenance
• Person responsible for its disassembly
PURPOSE OF THE INFORMATION CONTAINED IN THIS MANUAL:
• CORRECT HANDLING: performed by unskilled personnel
• CORRECT INSTALLATION: performed by skilled personnel
• CORRECT MANAGEMENT: performed by skilled personnel
• CORRECT MAINTENANCE: performed by skilled personnel
• CORRECT ORDER FOR SPARE PARTS: CORRECT DISPOSAL OF THE PRODUCT: made by skilled personnel
RESTRICTIONS TO THE USE OF THIS MANUAL
They apply to any operations that must be performed by highly skilled personnel.
WHERE AND HOW TO STORE THIS MANUAL
Inside the electric cabinet or together with any other literature concerning the equipment which utilizes
the product, provided it is a dry and clean place.
In the event of the manual being misplaced or damaged, the customer may require, for a fee, a new
manual, by quoting the model and serial number shown on the technical name- plate, by contacting:
P8GPV
*QHHOCP9
C[
#
PQMC/075#
P8GPVEQO
CURRENT TECHNOLOGY
Thismanualreectsthestateoftheartexistingatthetimetheproductismarketedandshallnot
be deemed to be inadequate for the sole reason that it has not been updated as a result of any new
experience.
UPDATES
nVent Equipment Protection reserves the right to update the product and relevant manual without being
requiredtoupdatepreviousproductsandmanualsotherthaninexceptionalcircumstances.Torequireor
receive any updates of the instructions manual or amendments thereto, which shall be deemed to be an
integral part of the manual, please contact nVent Equipment Protection.
Any suggestions or recommendations made by installers or users of the product for the purpose of
improving the product or the contents of this manual, will be greatly appreciated by the Manufacturer.
IN THE EVENT OF SALE OF THE PRODUCT
Please advise nVent Equipment Protection of the address of the new owner so as to enable the dispatch
of any updates to the manual, otherwise nVent Equipment Protection shall be relieved of any subsequent
liabilities.
© 2018 nVent 89087984
- 4 -
UNPACKING AND INSPECTION
Hoffman®coolingbrandedproductsareshippedex-works.Allunitshavebeenindividuallyinspectedandcarefully
packaged.
Immediately inspect the unit upon receipt, making sure it has been shipped in its proper position. Note improper
shipment on the shipping document. We recommend accepting merchandise subject to inspection.
Check for damage and, if any, note this immediately on the shipping document.
Removepackingandcheckthattheexteriorcasingisnotscratched,markedorhavesignsofblowsandthatno
components are missing.
Before throwing the packaging away, check that it does not contain documents or additional parts of the unit.
Any damage that is encountered must be communicated to the carrier by registered letter within 8 days of
receipt.
The carrier is responsible for any damage caused during shipment.
nVent Equipment Protection is not responsible for damage caused to the merchandise by the shipper but will do
all in its power to assist customers in these situations.
INCLUDED IN THE CARTON:
• HeatExchanger
• Mounting fastener kit
• Mounting gasket
• G-NPT Adapting Valves (2)
• User Manual
NOTE: This product may not be returned without prior written approval by nVent Equipment
Protection.
NOTE: If installation of the product is not immediately required or the product needs to be
transported to its final destination, repackage it after your initial inspection, and store it in a
safe place.
UNIT IDENTIFICATION
Thisunitcanbecorrectlyidentiedbythetechnicalnameplatecontainingalltheinformationforits
correct use.
Thetechnicalname-plateisembossedonaplasticsupportwhichensureshighenduranceofthetext
eveninparticularlydicultenvironments.
Note: The serial number is required for any assistance or information concerning the unit
described in this manual.
© 2018 nVent
89087984 - 5 -
SAFETY REMARKS
Operationandmaintenanceoftheheatexchangerscanbedangerousifnotcarriedoutwiththesamecareas
giventootherappliancesthathavemovingpartsandelectriccomponentsnexttowater.
Onlyskilledpersonnelmayrepair,inspectormaintaintheheatexchangers.
Before servicing this unit, refer to the instructions contained in this manual, check the data on the name-plate and
follow any other precaution to ensure absolute safety.
Disconnect power before working on the unit.
WARNING
PRECAUTIONS WHEN HANDLING THE UNIT
Metal edges may be sharp. Be careful handling the unit, and always wear gloves.
© 2018 nVent 89087984
- 6 -
OPERATING PRINCIPLE
Hoffmancoolingbrandedair-to-waterheatexchangersaredesignedforcoolingelectriccabinetswith
either a Type 12 or IP55 protection and are suitable for operating in industrial environments. These
models eliminate problems caused by high temperatures of the cabinet and prevent dirt and dust from
penetrating inside the electric board.
It is required that the water temperature be lower than the cabinet
temperaturefortheair-to-waterheatexchangertoworkproperly.
CAUTION
Coolingwater,aconstantowofwhichmustbefurnishedbytheuseratatemperaturethatislowerthanthe
temperatureinthecabinet,passesthroughthetubesinaheatexchangerwithcoppertubesandaluminumns
and back into the cabinet.
Heatistransferredthroughthewallsofthecoppertubes,exchangingheatfromthenstothecoldwatersothat
theairexitscoolerandthewaterhotter.
Note: The greater the difference between these two temperatures the more heat is exchanged.
Tem perature trend
0
10
20
30
40
50
60
tim e
°C
internal temp.
w ater temp.
t
AMBIENT
CA BI NET
WATER
© 2018 nVent
89087984 - 7 -
COOLING CAPACITY
Thisdependsonthespecicexchangefactoroftheheatexchanger(indicatedonthelabel)andthe
temperature difference between the interior of the cabinet and the cooling water.
FOR EXAMPLE:
Model: WCHE04916
Capacitynotedonlabel:2200W@25C∆T
Specicheattransmission:2200/25=88W/°C
Application:
Maximuminternalcabinettemperaturedesired:40C
Maximumestimatedwatertemperature:20C
∆TDifference:20C
Coolingcapacity:88x20=1760W
PERFORMANCE DATA WCHE019 SERIES
Parameter Units WCHE01916002 WCHE01926002
Voltage / Phase / Frequency V/ph/Hz 115/1/50-60 230/1/50-60
CoolingcapacityL35W10(25°CdT) W870
Power absorbed W28
Current absorbed A0.5
Maxairowthroughheatexchanger CFM (m3/h) 118 (200)
Recommendedwaterow gpm (l/h) 0.66 (150)
Pressure drop at recommended water
ow psi (kPa) 0.3 (2)
Maxwaterpressure psi (kPa) 73 (500)
Water connections (using valves) NPT 3/8 inch
OperatingtemperatureMin/Max °F(°C) 50/122 (10/50)
Noise level (measured at 1m) dB(A) 58
Duty cycle %100
Protective system side cabinet Type 12 / IP55
Protective system side ambient IP55
Weight lb (kg) 20 (9)
Electrical connection 6 foot (1.8m) cord with
NEMA 5-15P 6 foot (1.8m) cord with
NEMA 6-15P
© 2018 nVent 89087984
- 8 -
DESIGN DATA WCHE019 SERIES
:$7(5
,1
:$7(5
287
&21'(16$7(
'5$,178%(
(1&/2685(
$,5,1
(1&/2685(
$,5287
)5217
%$&.
)705()
32:(5&25':,7+3/8*
002817,1*+2/(6
%633*)(0$/(
:$7(5&211(&7,21
NOTES:
1. "G" TO NPT ADAPTING VALVES ARE INCLUDED
AND SHIPPED WITH THE UNIT.
5()
5()
5()
5()
&87287
89090291
© 2018 nVent
89087984 - 9 -
PERFORMANCE DATA WCHE049 SERIES
Parameter Units WCHE04916002 WCHE04926002
Voltage / Phase / Frequency V/ph/Hz 115/1/50-60 230/1/50-60
CoolingcapacityL35W10(25°CdT) W2200
Power absorbed W90
Current absorbed A0.8
Maxairowthroughheatexchanger CFM (m3/h) 247 (420)
Recommendedwaterow gpm (l/h) 0.66 (150)
Pressure drop at recommended water
ow psi (kPa) 4.4 (30)
Maxwaterpressure psi (kPa) 145 (1000)
Water connections (using valves) NPT 1/2 inch
OperatingtemperatureMin/Max °F(°C) 50/122 (10/50)
Noise level (measured at 1m) dB(A) 58
Protective system side cabinet Type 12 / IP55
Protective system side ambient IP55
Duty cycle %100
Weight lb (kg) 44 (20)
Electrical connection 6 foot (1.8m) cord with
NEMA 5-15P 6 foot (1.8m) cord with
NEMA 6-15P
© 2018 nVent 89087984
- 10 -
DESIGN DATA WCHE049 SERIES
:$7(5
,1
:$7(5
287
&21'(16$7(
'5$,178%(
(1&/2685(
$,5,1
(1&/2685(
$,5287
)5217
)705()
32:(5&25':,7+3/8*
002817,1*+2/(6
%633*)(0$/(
:$7(5&211(&7,21
NOTES:
1. "G" TO NPT ADAPTING VALVES ARE INCLUDED
AND SHIPPED WITH THE UNIT.
5()
5()
5()
5()
5()
&87287
89090292
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