Trane WC-IOM-7 manual

Installation Oper ation Maint enance December 2004 WC-IOM-7 Model Number WC*1 50B***G* WC*1 55B***G* WC*1 80B***G* WC*200B***G* WC*240B***G* P ac k ag ed Heat Pump[...]

W ar nings and Cautions © 20 08 T rane All rights reserved WC-IOM-7 Overview of Manual Note: One copy of this document ships inside the control panel of eac h unit and is customer property . It must be reta ined by the unit’ s maintenance personnel. This booklet describes proper installation, operation, an d maintenance procedures for air cooled[...]

WC-IOM-7 • P ac k aged Heat Pump 3  W ARNING Contains Refr iger ant! Syst em contains oil and r efr iger ant under high pr essur e. Recov er re fr iger ant to r elieve pr essure bef ore ope ning the system. See unit nameplate f or re fr iger ant type. Do not use non-appr ov ed r efrig erant s, r efr iger ant substitut es, or refr iger ant addi[...]

4 WC-IOM-7 Contents Model Number Descr iption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Gener al Infor mation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Unit Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

WC-IOM-7 5 Contents Cooling Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Heating Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Final Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

6 WC-IOM-7 Digits 1, 2 - Product Type Digit 8 - Electrical characterist ics WC = Packaged cooling, electric heat 3 = 208-230/60/3 WF = With factory installed options 4 = 460/60/3 D = 400/50/3 Digit 3 - Airflow Configuration T = 380/60/3 D = Downflow W = 575/60/3 H = Horizontal Digit 9, 10 - Factory installed options Digit 4, 5, 6 - Nominal gross co[...]

WC-IOM-7 • P ac k aged Heat Pump 7 Unit Nameplat e A Mylar unit nameplat e is locate d on the unit’ s corner suppor t next to the control box. It include s the unit model number , se rial number , elec trical c haracterist ics, refrigerant c harge, as well as other pertinent unit data. Compr essor Nameplate The nameplate for the co mpressor s a[...]

8 P ac k aged Heat Pump • WC-IOM-7 General Information ordered as a kit to be field installed. F ollow the installation instruction that ships with eac h kit when field installation is necessary . RLCI - ReliaT el™ LonT alk Communication Interf ace (Optional) This module is used wh en the applicat ion calls for an ICS TM building management typ[...]

WC-IOM-7 • P ac k aged Heat Pump 9 General Information Compr essor Disable (CPR1/2) This input incorpo rates the low pr essure control (LPC) of eac h re frigeration circuit and can be activated by opening a field supplied contact installed on the LT B . If this circuit is open before the compress or is star ted, the compressor will not be allowed[...]

10 P ac k aged Heat Pump • WC-IOM-7 General Information Lead/Lag Contr ol (Dual Circuit Only) Lead/Lag is a se lectable input located on t he R TRM. The RTRM is configured from the factory wit h the Lead/ L ag control disabled. T o activate the Lead/Lag function, simply cut the wire connected to J3-8 at the RTRM. When it is acti vated, ea c h tim[...]

WC-IOM-7 • P ac k aged Heat Pump 11 General Information Remot e Zone Sensor (BA Y SENS0 13C) This electronic sensor feature s remote z one sensing and timed over ride with over ride cancellation. It is used with a T rane Integrated Comfor tTM building management system. Remot e Zone Sensor (BA Y SENS0 14C) This electronic sen sor features sing le[...]

12 P ac k aged Heat Pump • WC-IOM-7 General Information Smok e Detect or Sensor (Optional) This sensor is only applicable on unit s equipped with a R TOM. It pro v ides high limit “shutdown ” of the unit and requir es a manual reset. The sensor is used to detect smoke due to fire in the ai r conditioning or ventilation ducts. Import ant: The [...]

WC-IOM-7 • P ac k aged Heat Pump 13 General Information T ake photos of the damage, if possible. The owner must provide reasona ble evidence that the damage did not occur af ter delivery . • Notify the appropriate sa les representative before inst alling or repairing a damaged unit .  W ARNING Fiber glass W ool Pr oduct contains fiberglass w[...]

14 P ac k aged Heat Pump • WC-IOM-7 General Information The manufacturer will not assume an y responsibility for equipment damag e resulting from condensat e accumulati on on the unit’ s electrical and/or mec hanical component s. Unit Clear ances Figure 1 illustrates the minimum ope rating and serv ice clearances for e ither a single or multipl[...]

WC-IOM-7 • P ac k aged Heat Pump 15 Unit Dimensions Figure 1 . T ypical Insta llation Clearances f or Single & Multiple Unit Applications[...]

16 P ac k aged Heat Pump • WC-IOM-7 Unit Dimensions Figur e 2. Unit Dimensio nal Data 12 1/2 T on, 15 T on Figur e 3. Roof Curb Dimensional Data 12 1/2 T on, 15 T on[...]

WC-IOM-7 • P ac k aged Heat Pump 17 Unit Dimensions Figur e 4. Unit Dimensional D ata 20 T on Figur e 5. Roofcurb Dimensional Da ta 20 T on[...]

18 P ac k aged Heat Pump • WC-IOM-7 Unit Dimensions Figur e 6. Hor izontal Duct Dimensional D ata 12 1/2 T on, 15 T on Figur e 7 . Hor izontal Duct Dimensional D ata 20 T on[...]

WC-IOM-7 • P ac k aged Heat Pump 19 Unit Dimensions  W ARNING Heavy Objects! Do not use cables (chains or slings) ex cept as shown. Each of the cables (chains or slings) used t o lift the unit must be capa ble of suppor ting the entir e weight of the unit. Lif ting cables (ch ains or slings ) may not be of the same lengt h. A djust as necessar[...]

20 P ac k aged Heat Pump • WC-IOM-7 Unit Dimensions Rigging Ref er to Figure 8 and Ta b l e 1 for typical unit operating weights rif fing before proceeding. 1 . Re move the shipping crate from around the unit. Do not remo ve the crating from the top of the unit. 2. Rig the unit as shown in Figure 8 . At tac h adequate strength lif ting slings to [...]

WC-IOM-7 • P ac k aged Heat Pump 21 F o undation Hor izontal Units If the unit is installed at ground level, elevate it above the snow line. P rovide concrete footings at ea c h support location with a “full perimeter” support structure or a slab foun dation for suppor t. Refer to T able 1 on page 1 9 for th e unit’ s operating and point lo[...]

22 P ac k aged Heat Pump • WC-IOM-7 Installation personnel with what is required in the insta llation process. It does not replace the detailed instructions cal led out in the applicable s ections of this manual. • Chec k the unit for shipping damage and material shor tage; file a freight claim and notify appropr iate sales representative. • [...]

WC-IOM-7 • P ac k aged Heat Pump 23 Installation • Connect properly siz ed control wiring to the proper termination points between the z one thermostat and the unit control pa nel. Condensate Dr ain Configuration An evaporator conden sate drain connectio n is provided on eac h unit. R efer to Unit Dimensions for the appropria t e drain location[...]

24 P ac k aged Heat Pump • WC-IOM-7 Installation Note: All field installed wiring must conform to NEC guidelines as w ell as State and Local codes. V erif y that the pow er supply avai lable is comp atible with the unit’ s n ameplate ratings. The available supply power must be within 1 0% of the rated v oltage stamped on the nameplate. Use only[...]

WC-IOM-7 • P ac k aged Heat Pump 25 Installation 2. Pro vide proper grounding for the unit in accordance with local and natio nal codes. Field Installed Contr ol Wir ing An overall layo ut of the various contr o l options available with t he required number of conducto rs for eac h control device is il lustrated in Figure 8. Note: All field wirin[...]

26 P ac k aged Heat Pump • WC-IOM-7 Installation The transformer is lo cated in the control panel. The circuit breaker is located on the lef t side of the transformer and can be reset by pressing in on the blac k reset but ton. Contr ols using 24 V AC Before installing an y conn ecting wiring, refer to Unit Dimensions for the electrical access lo[...]

WC-IOM-7 • P ac k aged Heat Pump 27 Installation Note: R esistance in excess of 2.5 ohms per conductor can cause deviations in the accuracy of the controls . 2. Ensure that t he wiring between controls an d the unit’ s termination point does not exceed two and a ha lf (2.5) ohms/conductor for the length of the run. 3. Do not run the electrical [...]

28 P ac k aged Heat Pump • WC-IOM-7 Installation Smok e Detect or Customer Lo w V oltage Wir i ng When interloc king Syste m Sensor smoke detectors together , all of the detectors must be powered from the same power supply . If multiple smok e detectors are required, all detectors must be disconnected from the HV AC unit power supply and connecte[...]

WC-IOM-7 • P ac k aged Heat Pump 29 Installation Figure 13. T ypic al field wir ing diagrams for optional contr ols (ReliaT el™ only)[...]

30 P ac k aged Heat Pump • WC-IOM-7 Installation Space T emperatur e A veraging Space temperature averaging is accomplishe d by wiring a number of remote sensors in a series/parallel circuit. Using the BA YSENS0 16* or BA YSENS0 17*, at least fo ur sensor s are requir ed to accomplish space temperature av eraging. Example #1 il lustrates two seri[...]

WC-IOM-7 • P ac k aged Heat Pump 31 Installation Use the c hec klist provided below in conjunction with the “Gene ral Unit Requireme nts” c hec klist to ensure that the unit is prope rly installed and re ady for operation.  W ARNING Hazardous V oltage! Disconnect all electr ic po wer , including r emote disconnects bef ore ser vicing. Foll[...]

32 P ac k aged Heat Pump • WC-IOM-7 Installation • Chec k the supply fan belts for proper te nsion and the fan bearings for suf ficient lubricatio n. If the belt s requi re adjust ment, or if the bearings need lubricating, refer to the maintenan c e section of t h is manual for inst ructions. • V erify that a condensate trap is installed and [...]

WC-IOM-7 • P ac k aged Heat Pump 33 Installation Electr ical Phasing (Thr ee Phase Motors) The compressor motor (s) and the supply fan motor are internally connected fo r the prope r rotation when the incoming power supply is phased as A, B, C. Prope r electrical supply phas in g can be quic kly determine d and cor rected before star ting the uni[...]

34 P ac k aged Heat Pump • WC-IOM-7 Installation starts. Oil foaming occurs when refrig erant condenses in the compre ssor and mixes with the oil. In lower ambient conditions, refrigerant migration to the compressor could increase. When the compressor star ts, the sudden reduction in crankcase pressure causes the liquid refrigerant t o boil ra pi[...]

WC-IOM-7 • P ac k aged Heat Pump 35 T est Modes There are three methods in whic h the “T est” mode can be cycled at L TB-T est 1 and L TB-T est 2. 1 . Step T est Mo de - This method initi ates the different components of the unit , one at a tim e, by temporarily shorting across the two test t erminals for two to three seco nds. For the initia[...]

36 P ac k aged Heat Pump • WC-IOM-7 Pre-Start V er ifying Proper Air Flo w (Units with Belt Dr ive Indoor F an) Muc h of the systems performance and rel iability is closely associat ed with, and dependent upon having th e proper airflow supplie d both to the space that is being conditioned and acro ss the evaporator coil. The indoor fan speed is [...]

WC-IOM-7 • P ac k aged Heat Pump 37 Pre-Start Retur n Air Smok e Detect or The return air smoke detector is designed to shut of f the unit if smoke is sensed in the return air stream. Samp ling the airf low entering the un it at the ret urn air opening performs this fun ction. In order for the smoke detector to properly sense smoke in the retu rn[...]

WC-IOM-7 • P ac k aged Heat Pump 38 Economizer Star t-Up ReliaT el Contr ol Using the Service T est Guide in T able 5, p. 35 , momentarily jump a cross the T est 1 & T est 2 te rminals on L T B1 one time to start the Minimum V e ntilation T est. 1 . Se t the minimum position setpoint for the economiz er to the required percentage of minimum v[...]

WC-IOM-7 • P ac k aged Heat Pump 39 Start Up Scr oll Compressors a. Once eac h compressor has star ted, verify that the rotat ion is correct. If a scroll compressor is rotating bac kw ards, it will not pump and a loud rat tling sound can be observed . b. If the electrical phasing is corr ect, before condemning a compressor , interc hange an y two[...]

40 P ac k aged Heat Pump • WC-IOM-7 Start Up 2. Re liaT el Control Using the Service T est Guide in T able 5, p. 35 , continue the SER VICE TEST star t-up procedure for eac h compressor circuit. Momentarily ju mp across the T est 1 & T est 2 terminals on L TB one additional time if continuing from previous comp onent star t-up or until the de[...]

WC-IOM-7 • P ac k aged Heat Pump 41  W ARNING Rotating Components! Dur ing installation, testing, servicing an d troubleshooting of this pr oduct it may be necessary t o measur e the speed of rotating components. Ha ve a qualified or licensed service individual who has been pr oper ly trained in handling expo sed ro tating components, perf or [...]

42 P ac k aged Heat Pump • WC-IOM-7 Maintenance Note: Actual be lt deflection “f orce” must not exceed the maximum “fo rce” value shown in Ta b l e 6 . 7 . R ec hec k the belt tension at least twice during the first 2 to 3 days of operation. Belt tension may decrea se until the new belts are “run in ” . Monthly Maint enance  W ARNI[...]

WC-IOM-7 • P ac k aged Heat Pump 43 Maintenance Filt ers • Inspect the return air filt ers. Clean or replace them if necessary . R e fer to the unit S ervice Facts fo r filter informat ion. Retur n Air Smok e Detect or Maintenance Airflow through the unit is af fected by the amount of dir t and debris accumulated on the indoor coil and filters.[...]

44 P ac k aged Heat Pump • WC-IOM-7 Maintenance • With the unit running, c hec k and record the: ambient temperature; compressor suction and disc harge pressures (eac h circuit); superheat (eac h circuit); Reco rd this data on an “ operator ’ s maintenance log” like the one shown in T able 7 on page 46 . If the operating pressure s indica[...]

WC-IOM-7 • P ac k aged Heat Pump 45 Maintenance  W ARNING Hazardous Pr essur es! Coils contain r efrig erant under pr essur e . When cleaning coils, maintain coil cleaning solution t emper atur e under 150°F t o av oid excessiv e pressur e in the coil. F ailure t o follo w these saf ety precautions could r esult in coil bursting, which could [...]

46 P ac k aged Heat Pump • WC-IOM-7 Maintenance ________________ _____________________ _____________________ _____________ ________________ _____________________ _____________________ _____________ — connection(s) ________________ _____________________ _____________________ _____________ ________________ _____________________ __________________[...]

WC-IOM-7 • P ac k aged Heat Pump 47 ReliaT el Con tr ol The R TRM has the abilit y to provide the service personne l with some unit diagnostics and system st atus information.  W ARNING Hazardous Service Pr ocedur es! The maint enance and troubleshoot ing proc edur es r e commended in this section of the manual could r esult in exposur e t o e[...]

48 P ac k aged Heat Pump • WC-IOM-7 Troubleshooting to c hec k all of the R TRM outputs, and all of the exte rnal controls (relays, contactors, etc.) that the R TRM outputs energiz e, for eac h respecti ve mode. Procee d to Step 6. 6. Step the system th rough all of the available modes, and verify operation of all outputs, controls, and modes. If[...]

WC-IOM-7 • P ac k aged Heat Pump 49 Troubleshooting LED 4 (Servic e) “ On” indica tes a clogged filter . “ Off ” during normal operation. “Flashing” indicates an evapora tor fan failure Below is the complete listing of failure indication cause s. S ystem F ailur e Chec k the v oltage between terminals 6 and 9 on J6, it should r ead ap[...]

50 P ac k aged Heat Pump • WC-IOM-7 Troubleshooting T est Mode = vo ltage alternates between 32 VDC & 0.75 VDC Heat F ailure Measure the v oltage between terminal s J6-7 & J6-6. Heat Operating = a pproxim ately 32 VDC Heat Off = less than 1 VD C, approximately 0.75 VDC Heating Failure = voltage alternates betw een 32 VDC & 0.75 VDC Co[...]

WC-IOM-7 • P ac k aged Heat Pump 51 Troubleshooting Method 2 T o reset the system at th e unit, cycle the unit power by tur ning the disconnect switc h “ Of f” and t hen “ On” . Loc kouts can be cle ared through the building ma nagement system. R efer to the building management system instructions for more information. Zone T emper atur e[...]

52 P ac k aged Heat Pump • WC-IOM-7 Troubleshooting Zone T empera tur e Sensor (ZTS) T est Note: Th ese procedures are not for progra mmable or digital models and are conducted with the Zone S ensor M odule electrically removed from the system. Te s t 1 Zone T emper atur e Ther misto r (ZTEMP) This component is tested by mea suring the resistance[...]

WC-IOM-7 • P ac k aged Heat Pump 53 Troubleshooting Te s t 3 S yst em Mode and F an Selection The combined resist ance of the Mode selection switc h and the Fan select ion switc h can be measure d between terminals 2 and 4 on t he Zone S ensor . The possible switc h c ombinations are listed on the follow ing page with their corr esponding resista[...]

54 P ac k aged Heat Pump • WC-IOM-7 Troubleshooting 4. V erify all modes of operation, by running the unit through all of the steps in the “T est Modes” section discussed in “Unit Start-Up” . 5. Af ter verifying proper unit operation, exit the test mode. T urn the fan on continuously at the ZSM, by pressing the but ton with the fan symbol[...]

WC-IOM-7 • P ac k aged Heat Pump 55 Troubleshooting Unit Economiz er Contr ol (ECA) T roubleshooting ReliaT el Contr ol T able 1 0. V er ify economizer stat us by ec onomizer act uator (ECA) LED indicat or: OFF : No Power or F ailure ON: Normal, OK to Economize Slow Flash: Normal, Not OK to Economize Fa s t F l a s h - 1/2 Second On / 2 Seconds O[...]

WC-IOM-7 • P ac k aged Heat Pump 56 For easier access, af ter 20 07 , published unit wiring diagrams (ind ividual, separate diagrams for unita ry product lines) will become available vi a e-Library inste ad of through wiring manuals. Diag rams prio r to 20 08 will be locate d in wiring diagram books R T -SVE03A- EN and R T -SVE06A-EN. Wir ing Dia[...]

WC-IOM-7 • P ac k aged Heat Pump 57 Heat Pump WCZ, WC Y , WCX, WCC, WCD , WCH, WCM, WCP and WSC (P ar ts Only) Models Less Than 20 T ons for Commer cial Use* This wa rra n ty is extended by T rane, to the original purc haser and to an y succeeding owner of the real proper ty to whic h the Heat P ump is originally af fixed, and applies to products[...]

58 P ac k aged Heat Pump • WC-IOM-7 Warranty Heat Pump Standard Equipment W ar ranty T er ms and Conditions Commercial Equipment W a r r anty and Liability Models Lar g er that 20 T ons for Commer cial Use* The Compan y war rants for a period of 12 months from initial star t-up or 18 months from date of shipment, whic hever is less, that the Comp[...]

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Literature Orde r Number WC-IOM-7 Date 12/04 Supersedes WC-IOM-7 (04/03) The manufacturer has a policy of continuous product and product data improvement and reserves the right to c hange design and specifications wi thout notice.[...]