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Cabinet Heater G*Y/D*Y Series

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

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TERMS AND CONDITIONS 

1.  Orders  shall  not  be  binding  upon  International  Environmental  Corporation,  an  Oklahoma 

corporation (hereinafter referred to as “IEC”) unless accepted by an authorized representative of 

IEC at its office in Oklahoma City, Oklahoma. No distributor, sales representative or any other 

person or entity (except authorized employees of IEC at its office in Oklahoma City, Oklahoma) 

has any authority whatsoever to bind IEC to any representation or agreement of any kind. 

 

2.  IEC  does  not  build  items  to  plans  and  specifications.  IEC  agrees  to  furnish  only  the  items  as 

described  in  IEC’s  acknowledgment  unless  IEC’s  office  in  Oklahoma  City,  Oklahoma  has 

previously received and accepted, in writing, approved submittals from Purchaser. 

 

3.  Prices  acknowledged  are  firm  only  if  Purchaser  releases  the  goods  covered  by  this  order  for 

immediate production by IEC within sixty (60) days from the date of Purchaser’s initial offer to 

purchase and for shipment by IEC within IEC’s estimated shipping date, unless otherwise agreed 

to in writing by IEC at its office in Oklahoma City, Oklahoma. If Purchaser does not meet the 

terms and conditions of this paragraph, the prices are subject to escalation to those prices in effect 

at time of shipment without notice to Purchaser. 

 

4.  All prices are F.O.B. IEC’s factory, unless otherwise agreed by IEC in writing; and, all payments 

and prices shall be in U.S.A. dollars. 

 

5.  If goods are released for production but IEC is prevented by the Purchaser from shipping upon 

completion  or  by  IEC’s  estimated  shipping  date,  whichever  is  later,  IEC  may  at  its  option,  in 

addition to all other remedies, invoice Purchaser to be payable within thirty (30) days and store the 

goods at Purchaser’s sole expense. 

 

6.  Title to and risk of loss to the goods passes to the Purchaser F.O.B. IEC’s factory. 

 

7. 

Disclaimer

 

 

It  is  expressly  understood  that  unless  a  statement  is  specifically  identified  as  a  warranty, 

statements made by IEC or its representatives relating to IEC’s products, whether oral, written or 

contained in any sales literature, catalog or any other agreement, are not express warranties and do 

not  form  a  part  of  the  basis  of  the  bargain,  but  are  merely  IEC’s  opinion  or  commendation  of 

IEC’s  products. 

EXCEPT  AS  SPECIFICALLY  SET  FORTH  HEREIN,  THERE  IS  NO 

EXPRESS  WARRANTY  AS  TO  ANY  OF  IEC’S  PRODUCTS.  IEC  MAKES  NO 

WARRANTY  AGAINST  LATENT  DEFECTS.  IEC  MAKES  NO  WARRANTY  OF 

MERCHANTABILITY OF THE GOODS OR OF THE FITNESS OF THE GOODS FOR 

ANY PARTICULAR PURPOSE. 

 

8. 

Grant of Limited Express Warranty 

 

IEC warrants IEC products purchased and retained in the United States of America and Canada to 

be free from defects in material and workmanship under normal use and maintenance as follows: 

(1) All complete fan coil units built or sold by IEC for twelve (12) months from date of unit start 

up or eighteen (18) months from date of shipment (from factory), whichever comes first. 

 

 

All parts must be returned to IEC’s factory in Oklahoma City, Oklahoma, freight prepaid, no later 

than  sixty  (60)  days  after  the  date  of  the  failure  of  the  part;  if  IEC  determines  the  part  to  be 

defective and within IEC’s Limited Express Warranty, IEC shall, when such part has been either 

replaced or repaired, return such to a factory recognized contractor or service organization, F.O.B. 

IEC’s factory, Oklahoma City, Oklahoma, freight prepaid. The warranty on any parts repaired or 

replaced under warranty expires at the end of the original warranty period. For information and 

warranty service contact: 

 

International Environmental Corporation 

Customer Service 

5000 West I-40 

Oklahoma City, OK  73128 

(405) 605-5000 

 

 

This  warranty  does  not  cover  and  does  not  apply  to:  (1)  Air  filters,  fuses,  fluids;  (2)  Products 

relocated after initial installation; (3) Any portion or component of any system that is not supplied 

by IEC, regardless of the cause of the failure of such portion or component; (4) Products on which 

the  unit  identification  tags  or  labels  have  been  removed  or  defaced;  (5)  Products  on  which 

payment to IEC is or has been in default; (6) Products which have defects or damage which result 

from  improper  installation,  wiring,  electrical  imbalance  characteristics  or  maintenance;  or  are 

caused by accident, misuse or abuse, fire, flood, alteration or misapplication of the product; (7) 

Products  which  have  defects  or  damage  which  result  from  a  contaminated  or  corrosive  air  or 

liquid supply or operation at abnormal temperatures; (8) Mold, fungus or bacteria damages; (9) 

Products subjected to  corrosion or abrasion;  (10) Products  manufactured or supplied by others; 

(11) Products which have been subjected to misuse, negligence or accidents; (12) Products which 

have been operated in a  manner contrary  to IEC’s printed instructions; or (13) Products which 

have defects, damage or insufficient performance as a result of insufficient or incorrect system 

design or the improper application of IEC’s products. 

 

 

IEC is not responsible for: (1) The cost of any fluids or other system components, or associated 

labor to repair or replace the same, which is incurred as a result of a defective part covered by 

IEC’s Limited Express Warranty;  (2) The costs of labor, materials or service incurred in removal 

of the defective part, or in obtaining and replacing the new or repaired part; or, (3) Transportation 

costs of the defective part from the installation site to IEC or of the return of any part not covered 

by IEC’s Limited Express Warranty. 

 

Limitation:

  This  Limited  Express  Warranty  is  given  in  lieu  of  all  other  warranties.  If, 

notwithstanding the disclaimers contained herein, it is determined that other warranties exist, any 

such warranties, including without limitation any express warranties or any implied warranties of 

fitness for particular purpose and merchantability, shall be limited to the duration of the Limited 

Express Warranty. 

 

9. 

Limitation of Remedies

 

 

In the event of a breach of the Limited Express Warranty, IEC will only be obligated at IEC’s 

option to repair the failed part or unit or to furnish a new or rebuilt part or unit in exchange for the 

part or unit which has failed. If after written notice to IEC’s factory in Oklahoma City, Oklahoma 

of each defect, malfunction or other failure and a reasonable number of attempts by IEC to correct 

the  defect,  malfunction  or  other  failure  and the  remedy  fails  of  its  essential  purpose,  IEC  shall 

refund the purchase price paid to IEC in exchange for the return of the sold good(s). Said refund 

shall  be  the  maximum  liability  of  IEC. 

THIS  REMEDY  IS  THE  SOLE  AND  EXCLUSIVE 

REMEDY OF THE BUYER OR THEIR PURCHASER AGAINST IEC FOR BREACH OF 

CONTRACT, FOR BREACH OF ANY WARRANTY OR FOR IEC’S NEGLIGENCE OR 

IN STRICT LIABILITY. 

 

10. 

Limitation of Liability

 

 

IEC shall have no liability for any damages if IEC’s performance is delayed for any reason or is 

prevented to any extent by any event such as, but not limited to: any war, civil unrest, government 

restrictions  or  restraints,  strikes,  or  work  stoppages,  fire,  flood,  accident,  shortages  of 

transportation, fuel, material or labor, acts of God or any other reason beyond the sole control of 

IEC. 

IEC  EXPRESSLY  DISCLAIMS  AND  EXCLUDES  ANY  LIABILITY  FOR 

CONSEQUENTIAL  OR  INCIDENTAL  DAMAGE  IN  CONTRACT,  FOR  BREACH  OF 

ANY  EXPRESS  OR  IMPLIED  WARRANTY,  OR  IN  TORT,  WHETHER  FOR  IEC’s 

NEGLIGENCE OR AS STRICT LIABILITY. 

 

11.  IEC shall have no system design, application or maintenance responsibility or responsibility for 

mold, fungus or bacteria to Purchaser or any other third party. 

 

12.  All  sales,  goods  and  services,  use,  excise,  value  added,  transportation,  privilege,  occupational 

consumption, storage,  document, transaction  or other taxes  which  may  be  levied by any taxing 

authority as a result of this transaction shall be paid by the Purchaser. 

 

13.  Unless otherwise agreed to in writing by IEC any technical data furnished in conjunction with this 

order and not obtainable from another source shall not be duplicated, used, or disclosed in whole 

or in part for any purpose other than to evaluate this order. 

 

14.  IEC shall have no liability or other obligation hereunder, if IEC’s performance is delayed for any 

reason or is prevented to any extent by any event such as, but not limited to: any act of God, strike 

or  work  stoppage,  fire,  flood,  accident,  allocation,  or  other  controls  of  Government  authorities, 

shortages of transportation, fuel, material or labor, or any other cause beyond IEC’s sole control. 

Any shipping date stated by IEC is IEC’s best estimate but IEC makes no guarantee of shipment 

by any such date and shall have no liability or other obligation for failure to ship on such date, 

regardless of cause. 

 

15.  Payment terms are net thirty (30) days from date of shipment on approved credit. One and one 

half percent (1 1/2%) per month (18% annual rate) may be charged on past due accounts or the 

highest rate permitted by applicable law, whichever is lesser. In the event the account is placed for 

collection, Purchaser shall be responsible for all reasonable attorneys fees or costs on a solicitor 

and client basis, plus all other costs and expenses incurred by IEC in securing payment. 

 

16.  Purchaser  shall  not  cancel  the  contract  without  prior  written  consent  of  an  authorized 

representative of IEC at its offices in Oklahoma City, Oklahoma. In the event Purchaser cancels 

the  contract  with  the  prior  written  consent  of  IEC  after  the  Purchaser’s  offer  to  purchase  is 

received and acknowledged in writing, IEC shall be entitled to receive from Purchaser IEC’s cost 

incurred to time of cancellation plus a reasonable allowance for overhead and profit. 

 

17.  Purchaser shall not assign any of its interest or rights under this agreement without written consent 

of IEC. 

 

18.  IEC will protect all its lien rights. IEC will not furnish lien waivers or releases until IEC receives 

payment, in full, at its office in Oklahoma City, Oklahoma from Purchaser for the goods covered 

by this order. There is no authorized retainage for any reason. 

 

19.  This Agreement shall be construed, and the rights and liabilities of the parties hereunder shall be 

determined in accordance with the laws of the State of Oklahoma. If it shall be found that any 

portion of this agreement violates any particular law of the United States or any state in the United 

States  having  jurisdiction  or,  if  applicable,  any  law  of  Canada  or  any  province  or  territory  in 

Canada having jurisdiction, such portion of the agreement shall be of no force and effect in that 

political  unit,  division  or  sub-division  in  which  they  are  illegal  or  unenforceable  and  the 

agreement shall be treated as if such portion or portions had not been inserted. In the event that 

any dispute or disagreement in connection with any order should arise or exist between Purchaser 

and IEC, jurisdiction and venue for any legal action shall be, if IEC so elects, exclusively in the 

state or federal courts in Oklahoma County, Oklahoma. The statute of limitations on any claim of 

the Purchaser against the IEC shall be one (1) year from the date the cause of action accrues. 

 

20.  Without  regard  to  any  other  agreement,  all  obligations  of  Purchaser  to  IEC  shall  become 

immediately  due  and  payable  if  Purchaser  becomes  insolvent  or  if  Purchaser  does  not  make 

payments when due or breaches any other agreement or fails to perform any obligation. 

 

21.  All orders are expressly limited and made conditional upon acceptance by Purchaser of the terms 

and conditions set forth above without change. There shall be no understandings, agreements, or 

obligations  (outside  these  terms  and  conditions)  unless  specifically  set  forth  in  writing  and 

accepted by signature of an authorized representative of IEC in Oklahoma City, Oklahoma. 

 

22.  The parties hereto have requested that these presents and all judicial proceedings relating thereto 

be  drafted  in  English.  Les  parties  aux  présentes  ont  demandé  à  ce  que  les  présentes  et  toutes 

procedures judiciaires y afférentes soient rédigées en anglais 

Forms\IEC\Standard Forms\Word Files\IEC Terms and Conditions 1-Page 09-10.doc 

 

Summary of Contents for D Y Series

Page 1: ...RATION MAINTENANCE MANUAL Vertical Horizontal Vertical floor or wall mounted for concealed or exposed applications Horizontal ceiling for exposed or partially exposed applications Hot water coils steam coils or electric heat only options Optional colors valve packages controls and unit configurations Nominal CFM range of 200 to 1 200 CFM DBY GXY ...

Page 2: ... of its products International Environmental Corporation IEC works continually to improve its products As a result the design and specifications of each product may be changed without notice and may not be as described herein Please contact IEC for information regarding current design and product specifications Statements and other information contained herein are not express warranties and do not...

Page 3: ...eplacement Parts SECTION FIVE Equipment Start Up 32 Check List IMPORTANT 33 Terms and Conditions SECTION ONE Installation 4 Preface 4 Unpacking and Inspection 5 Prepare Jobsite and Units 5 Handling and Installation 6 Unit Clearance and Service Access 8 Vertical Series Unit Installation 9 Cabinet Front Panel Installation and Removal 9 Decorative Wall Panels Installation GHY 11 Optional Trim Kit Ins...

Page 4: ...t pressures as shown on unit rating plate Always pressure test with an inert fluid or gas such as clear water or dry nitrogen to avoid possible damage or injury in the event of a leak or component failure during testing Always protect adjacent flammable material when welding or soldering Use a suitable heat shield material to contain sparks or drops of solder Have a fire extinguisher readily avail...

Page 5: ...quired 3 Perform Dry Fit of valve assembly that may be shipped unattached to unit coil assembly Should any questions arise on fit up please contact your local representative immediately Handling and Installation While all equipment is designed and fabricated with sturdy materials and may present a rugged appearance great care must be taken to assure that no force or pressure be applied to the coil...

Page 6: ...et and recessed units have removable front panels to allow access to the unit Hydronic Heat units have either right or left hand piping Reference piping locations by facing the front of the unit airflow discharges from the front The control panel is always on the end opposite the piping See Figures 1 and 2 for recommended service and operating clearances Size GHY GXY GSY 02 23 1 2 597 41 1041 03 2...

Page 7: ...2 48 1219 06 55 1397 53 1346 08 55 1397 60 1524 10 77 1956 74 1880 12 77 1956 83 2083 Table 2 Horizontal Ceiling Coil Removal Minimum Service Clearance Width 12 18 in see table 2 28 in 28 in Figure 4 DXY Unit Clearance Service Access Controls Side Piping Side 12 18 in 28 in 28 in see table 2 Controls Side Piping Side Figure 3 DBY Unit Clearance and Service Access ...

Page 8: ...the floor is able to support the weight of the unit See submittal drawings for nominal unit weight 3 Ensure wall behind unit is smooth and plumb if necessary install furring strips on walls with irregular surfaces or mullions Furring strips must be positioned behind mounting holes in unit Fasteners furring strips and other seals if required must be field supplied 4 Remove all wall and floor moldin...

Page 9: ...lt into the wall of the conditioned areas They cover the recess opening on all sides and are easily removed for access to the unit A top bottom and side framing studs are required to properly secure the wall panel to dry wall Reference Figures 8 and 10 for install diagram requirements Secure the Wall panel FRAME to the framing studs with field supplied mounting hardware Once the frame is secured t...

Page 10: ...ries INSTALLATION OPERATION MAINTENANCE MANUAL 10 SECTION ONE Installation Cont d Figure 8 Style W Framed Wall Panel Install Diagram Figure 9 Style Z Framed Wall Panel Style Z Figure 10 Style Z Framed Wall Panel Install Diagram ...

Page 11: ...sing the mounting points provided with 3 8 all thread rod and other hardware not supplied with unit The unit must be positioned so that the coil or electric heat elements are on a LEVEL PLANE Other field furnished mounting devices such as rubber in shear or spring type vibration isolators selected by the contractor or engineer may be substituted for the factory grommets and should be used where fa...

Page 12: ...o penetrate the rear of the fan coil cabinet Hot extension tubes must be properly insulated Hydronic Heating Connections After mounting the unit it is then ready for the various service connections such as water and electrical At this time it should be verified that the proper types of services are actually provided to the unit On those units requiring hot water the proper line size and water temp...

Page 13: ...in accordance with the project specifications This is the responsibility of the installing or insulation contractor Electrical Connections The electrical service to the unit should be compared to the unit nameplate to verify compatibility The routing and sizing of all piping and the type and sizing of all wiring and other electrical components such as circuit breakers disconnect switches etc shoul...

Page 14: ...ng codes and ordinances Any modification of the unit wiring without factory authorization will void all of the factory warranties and will nullify any agency listings The manufacturer assumes no responsibility for any damages and or injuries resulting from improper field installation and or wiring 1 After planning for and bringing incoming power to the unit locate the control box and cover plate i...

Page 15: ...rom the factory supply and return grilles should be provided as recommended in the product catalog For units with no return air ductwork check local code requirements for possible application restrictions All units must be installed in areas that are non combustible Some models are designed to be connected to ductwork with a MINIMUM amount of external static pressure These units may be damaged by ...

Page 16: ...pected to verify that all systems are complete and properly installed and mounted and that no debris or foreign articles such as paper or drink cans are left in the units or other areas Clean dirt dust and other construction debris from unit interior Be sure to check fan wheel and housing and clean if necessary 4 Rotate fan wheel by hand to be sure it is free and does not rub housing Check that wi...

Page 17: ...n struction During this procedure all unit service valves must be in the closed position This prevents foreign matter from entering the unit and clogging the valves and metering devices Strainers should be installed in the piping mains to prevent this material from entering the units during normal operation During system filling air venting from the unit is accomplished by the use of the standard ...

Page 18: ...hould not be attempted by unqualified personnel The system must be complete and all components must be in operating condition BEFORE beginning water system balancing operations Each hydronic system has different operating characteristics depending on the devices and controls used in the system The actual balancing technique may vary from one system to another After the proper system operation is e...

Page 19: ...CN8 Line Service Voltage 9 CN9 PSC Motor Connection 10 CN10 ECM Connection 11 ECM Fan Speed Adjustment 12 Ground Connection 13 LED Diagnostics for Multimeter Diagnostics 85 Control Board E025 71481108 Changeover Return Air Sensor CN2 Pluggable T Stat Connector CN1 Remote Shutdown Input CN3 Overflow Switch CN4 Two Stage Cooling CN5 Actuator Aquastat CN6 Transformer CN7 Line Service Voltage CN8 PSC ...

Page 20: ...led IEC 24V Thermostat Does not apply to proportional or Line voltage thermostat controls The diagram below represents a factory installed IEC 24V thermostat Connection Function Description 10V Not used COM Ground control power G3 HI Fan High Speed G2 MED Fan Medium Speed G1 LOW Fan Low Speed W1 HTG Heat Y1 CLG Cool W2 HT2 Heat stage 2 Y2 CL2 Cool stage 2 R 24V 24V Controller Power COS Changeover ...

Page 21: ...nsor RAS Room air sensor 2 CN2 Changeover Return Air Sensor l Power connector for 24V or Common powered sensors m 24V powered sensors l Applicable for IEC supplied air sensor for Wi Fi E055 71520330 Programmable E055 71520317 Non programmable E055 71520316 24V IEC thermostats m Common powered sensors l Applicable for thermostats by others l Sensor switch m 10k thermistor m Bimetal switch 3 CN3 Rem...

Page 22: ...Contact factory for applications l CLG or HTG LED indication when either 1st stage cooling or heating activated 7 CN7 Class II Transformer l 40VA 75VA option l 24V LED activated when powered 8 CN8 Incoming Power 9 CN9 PSC Motor l 3 speed application l Either LOW MED HI activated when a speed is selected 10 CN10 EC Motor l 3 speed application l Solid State switching l Either LOW MED HI activated wh...

Page 23: ...flow Adjusting the potentiometers requires the use of a Multi meter capable of measuring 0 5 vdc 1 Only trained and qualified individuals should attempt to adjust or service components on any electrical component Failure to follow safety rules could result in electrical shock or hazard 2 24 VAC power must be supplied to ECM board to make adjustments 3 Set the electrical multimeter to Volts Direct ...

Page 24: ...rflow for 0 10 VDC If a factory provided thermostat or DDC controller is utilized then the unit is already correctly configured Eco 2 Variable Airflow for 0 10 VDC No control board is required and no field adjustments are possible Motor uses 0 10VDC signal directly See control box label Fan enable at 1 5VDC 12 Ground Tab Connection l For mulitmeter diagnostics ...

Page 25: ...DC is applied to HTG that control signal will passively be present at Pin 8 of the CN6 connector HTG LED shows GREEN Signal for 1st stage cooling valve present G Fan Low Speed 24VAC LOW 24VAC signal applied to LOW of CN1 The low speed PSC motor power relay and the low speed ECM signal relays will be activated Line voltage will be present at Pin 2 of CN9 and the adjustable low speed ECM DC signal w...

Page 26: ...ies INSTALLATION OPERATION MAINTENANCE MANUAL 26 SECTION THREE Controls Operation Cont d Example Wiring Diagram Electric Heat Only NOTE Wiring diagram also available through QR code found on the unit serialized name plate label ...

Page 27: ... INSTALLATION OPERATION MAINTENANCE MANUAL 27 SECTION THREE Controls Operation Cont d Example Wiring Diagram 2 Pipe Hydronic Heat Only NOTE Wiring diagram also available through QR code found on the unit serialized name plate label ...

Page 28: ...the assembly require more extensive service the motor blower assembly may be removed from the unit to facilitate such operations as motor or blower wheel housing replacement etc Dirt and dust should not be allowed to accumulate on the blower wheel or housing This can result in an unbalanced blower wheel condition which can damage a blower wheel or motor The wheel and housing may be cleaned periodi...

Page 29: ...nuous operation With proper unit application and operation the high limit thermal cutout will not operate This device only operates when a problem exists and ANY condition that causes high limit cutout MUST be corrected immediately High supply voltage also causes excessive amperage draw and may trip the circuit breaker or blow the fuses on the incoming power supply After proper air flow and supply...

Page 30: ...be recorded in the log for each unit Refer to the product catalog for the recommended filter size for each product type and size If the replacement filters are not purchased from the factory the filters used should be the same type and size as those furnished from or recommended by the factory Pleated media or extended surface filters should not be used since the high air pressure drops encountere...

Page 31: ...tification 1 Complete unit model number 2 Unit serial number 3 Complete part description including any numbers For warranty parts inquiries in addition to the information previously listed a description of the issue with the parts is required Contact the factory for authorization to return any parts such as defective parts to be replaced in warranty All shipments returned to the factory must be ma...

Page 32: ...hilled water line size to unit Proper hot water line size to unit All services to unit in code compliance All shipping screws and braces removed Unit protected from dirt and foreign matter Heating Connections Protect valve package components from heat Mount valve packages Connect field piping to unit Pressure test all piping for leaks Install drain line and traps as required Insulate all piping as...

Page 33: ...he event of a breach of the Limited Express Warranty IEC will only be obligated at IEC s option to repair the failed part or unit or to furnish a new or rebuilt part or unit in exchange for the part or unit which has failed If after written notice to IEC s factory in Oklahoma City Oklahoma of each defect malfunction or other failure and a reasonable number of attempts by IEC to correct the defect ...

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Page 35: ...Cabinet Heater G Y D Y Series INSTALLATION OPERATION MAINTENANCE MANUAL 35 This page intentionally left blank ...

Page 36: ... Series INSTALLATION OPERATION MAINTENANCE MANUAL Contact your local IEC Sales Representative for further details and pricing applicable to this product Visit our website iec okc com to find your local IEC Sales Rep IEC Part Number I100 90034485 IOM 010 Rev 2 07 2021 2021 International Environmental Corporation IEC ...

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