York YMBE User's Manual
Contents
1. 24V CLASS 2 i WIRING 7 J MB MB HW UPFLOW HORIZONTAL FIELD FAN COIL POWER With Control x Board Installed SUPPLY TYPICAL 4 PIPE SHOWN So FIELD WIRING FIG 5 T200 THERMOSTAT W CONTROLLER OPTION YORK INTERNATIONAL FORM 115 20 NOM4 105 INSTALLATION YMB YMB HW YMBE 1 Separate cooling and heating coils 4 row cooling 1 Factory installed electric heat Coil 2 120V multi speed motor 3 Vertical Horizontal drain pan right to left and left to right airflow 4 Manual air vent 5 Throw away filter HOT WATER COIL 7 8 O D CONNECTION 1 1 8 O D on 20mb HW C 4 G 3 OPENING WATER OUT IN HOT WATER COIL shown ELECTRICAL COMPARTMENT HORIZONTAL CONVERTIBLE DRAIN PAN COIL CONNECTIONS SWEAT 7 8 O D ON 8 12mb HW 1 1 8 O D ON 16 20MB HW p FIG 5 YMB YMB HW YMBE DIMENSIONS FILTER 2 208 240 volt Motor 3 240 24 transformer 4 Circuit breaker disconnect above 10 kW 5 Manual air vent 6 Throwaway filter 7 Vertical Horizontal drain pan right to left and left to right airflow 8 277 available 10 kW maximum POWER SUPPLY K O both sides m D DRAIN CONNECTION PRIMARY AND SECONDARY DRAIN ARE 3 4 MPT TABLE 2 PHYSICAL DIMENSIONS INCHES e Fl s Fiers 8YMB 8YMB HW 40 20 8YMBE 12YMB 42 23 20 21 1 2 10 12YMB HW 2 16 20YMB 16YMB HW 16 20YMBE 20YMB HW YORK IN2. 1005 8 800 10 1000 12 1200 CFM 16 1600 CFM 20 2000 CFM York Basic Unit Basic Unit Options E E designates Electric Heat is kW of Electric Heat 2HW 2 row Hot Water Coil 3HW 3 row Hot Water Coil 4HW 4 row Hot Water Coil FIG 1 UNIT NOMENCLATURE 2 YORK INTERNATIONAL FORM 115 20 NOM4 105 INSTALLATION RECEIVING Material in this shipment has been inspected at the factory and released to the transportation agency in good condition When received a visual inspection of all cartons should be made immediately Any evidence ofrough handling or apparent damage should be noted on the delivery receipt and the material inspected in the presence of the carrier s representative If damage is found a claim should be N filed against the carrier immediately CAUTION STORAGE If the equipment is not to be immediately installed store it in a dry location with the motor protected against moisture dust corrosion and physical dam age DESCRIPTION The YMB Series 2 pipe fan coil comes with a 4 row cooling heating coil and a 120V multi speed mo tor The YMBE Series 240V 2 pipe fan coil comes with a 4 row cooling coil 240V multi speed motor 240 24 transformer and up to 25kW of factory installed elec tric heat Models with more than 10kW also include circuit breaker for branch circuit protection Control voltage is 24V The YMBE Series fan coil comes with a 4
3. drain may be required as back up to a clogged primary drain Check that coil s valves and piping have been leak checked and insulated as required Q Main coil drain pan must be properly trapped and charged with water before units are started Return valves to their proper operating positions prior to start up Repair any solder joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required Install all panels Q Ensure that all air has been vented from the system CLEANING CHECKLIST Installer has cleaned out interior Q Ensure drain pan free from foreign material Q Ensure air filters are clean installed properly and secured Use the directional arrows or other information on the filter to determine the proper flow direction CONTROLS CHECKLIST Q Review electrical print for correct wiring Fan INSPECTION fan should be inspected and cleaned in conjunction with maintenance of the motor and bearings It is important to keep the wheel clean in order to avoid imbalance and vibration NOTE If the motor and fan have not been operated in the last 4 four weeks or more lubricate all the bearings and rotate the motor and fan monthly to prevent moisture from accumulating in the bearings See Form 50 20 NM3 Long Term Storage YORK INTERNATIONAL 7 MAINTENANCE MOTOR The blower motor should be cleaned annually and if it has oiling ports it should be o
4. gt E FAN COIL AIR CONDITIONERS INSTALLATION OPERATION amp MAINTENANCE NEW RELEASE Form 115 20 105 MODELS YMB YMB HW YMBE YMB Series n 2 pipe cooling and heating Replaces the MH Series YMB HW Series 4 pipe cooling and heating Replaces the MH HW Series YMBE Series 2 cooling with electric heat Replaces Series a 00781VIP AIR FLOW i 4 AIR FLOW OO STANDARD HORIZONTAL POSITION gt AIR FLOW TF oo ALTERNATE HORIZONTAL POSITION FIELD CONVERTIBLE 11207966 See page 3 for details Notes 1 For proper operation control valve must be normally closed 2 Aquastats provided where required 3 Electric Heat is only available in the YMBE series These units require a remote thermostat low voltage 4 wire thermostat WARNING TO INSTALLER SERVICE PERSONNEL AND OWNER Altering the product or replacing parts with non authorized factory parts voids all warranty or implied warranty and may result in adverse operational performance and or a possible hazardous safety condition to service personnel and occupants Company employees and or contractors are not authorized to waive this warning L23954Y 1 05 FORM 115 20 NOM4 105 TABLE OF CONTENTS INSTALLATION IUIUS IIT 3 6 RECEIVING cine
5. no o b Oa RECO c d DO oda DO RO o DX E HR GER LEON IR RO RE d CR 3 STORAGE na Rec c RE E Ede 3 DESCRIPTION 5 EAEn e EEEN EEEN EEANN 3 HORIZONTAL 3 WIRING 3 4 5225545 ER KDE RR ELA HE ER E 3 222 6 PIPING PRECAUTIONS 6 DRAIN PIPING ERGO A T E 6 START UD Gen una ERE IR ARRA ORE HEEL ee a A a OR LUCR RR tain 7 MAINTENANCE 55 2 EE RR OS Earn FRE REOR CE Cedo nU ARES Rae ck cn RES 8 Reference Documents Engineering Guide Direct Drive YMB Models Form115 20 EG4 Latest Parts List Fan Coil Air Conditioners Form 115 20 RP2 Latest These documents can be ordered through Publications Dept or downloaded http intranet york com web0003 library default asp TABLE 1 SHIPPING WEIGHTS LBS 12 120 10 12 135 12YMBE 120 HW 16 20YMB 210 16YMB HW 210 16 20YMBE 210 20YMB HW 264 12 Y MB E15 NOM
6. TERNATIONAL dud 1 4 26 1 4 TIE 18 20 1 20 22 1 24 20 25 1 14 X 24 X 1 2 REQUIRED 2 FORM 115 20 NOM4 105 INSTALLATION PIPING The supply and return piping must be adequately sized to meet the design water flow requirements as specified for the specific installation see table 3 for connection sizes All chilled water piping must be insulated to prevent condensation It is also recommended that all piping be insulated to prevent freezing when piping is run in an unconditioned space Coil freeze protection is recommended for applications where the fan coil is located in ambient air locations attics crawl spaces etc or within structures that may be unoccupied during freez ing conditions Consult the factory for additional information PIPING PRECAUTIONS Flush all piping prior to connection to remove all debris Use wet cotton rags to cool valve bodies when soldering Open all valves midway for hand valves manually open on motorized valves prior to soldering e Whensolderingto bronze or brass heat the piping while in the socket cup and begin introducing the solder when the flux boils rapidly Avoid direct flame into the solder joint TABLE 3 COIL CONNECTIONS Heatcanonly be applied to the cup ofthe valve body for a min 1 mal time before damage occurs even with the use of wet rags Avoid rapid quenching of solder joints as this will pr
7. iled with a good grade of SAE 20 oil Normally a few drops of oil in each bearing is sufficient COIL The coil must be kept clean by any of the following methods 1 Cleaning with low pressure compressed air 2 Flushing or rinsing with water a detergent is advisable for greasy surfaces FILTERS Clean or Replace Air Filters Regu larly NOTE The intervals at which filters require replacement depend on local conditions Because of dust and lint in the room room air filters load up much more rapidly than outdoor air filters Under normal conditions the room air filter requires replacement every six to eight weeks To ensure proper maintenance of the filters it 1s best to follow an organized maintenance procedure The following one is recommended a YORK P O Box 1592 York Pennsylvania USA 17405 1592 Copyright by York International Corporation 2004 Form 115 20 NOM4 105 New Release Tele 800 861 1001 www York com Divide the total number of units on the job into six equal groups Each week inspect clean or replace the filters in each group in rotation This insures a uniform servicing interval The interval may be lengthened or shortened as determined by experience If inspection shows only the room air filter to be dirty this one alone should be replaced Dirty filters reduce the air and heat ing capacities of the Unit Ventilator When the filters are excessively dirty the unit heating capacity wil
8. l be so re NOTE TON duced that it is ineffective for heating the room When a room fails to heat always check the filters CLEAN UNIT INTERIOR Once a year clean the fans and coils of the unit thor oughly Remove the access panel as necessary Wipe the interior of the unit clean with a rag Wipe the motor and inside and outside of the fan housings In cooling units clean out the drain pan Subject to change without notice Printed in USA ALL RIGHTS RESERVED
9. oduce joints of inferior quality Connect all piping per accepted industry standards and observe all regulations governing installation of piping systems When all connections are complete the system must be pressure tested Repair any solder joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required Hydronic systems are not designed to hold pressurized air and should only be tested with water When connecting piping or valve kits to fan coil units do not bend or reposition the coil header tubing for alignment purposes This could cause a tubing fracture resulting in a water leak when water pressure is applied to the system DRAIN PIPING Condensate drain lines must be installed with adequate slope away from the unit to assure positive drain age Since the drain pan is located on the suction side of the blower a negative pressure exists at the drain pan and a minimum trap of 1 1 2 inches must be provided in the drain line to assure proper drainage Drain connections primary and secondary are 3 4 COOLING COIL CONNECTIONS INCHES YMB YMBE YMB HW SIZES 8 10 12 7 8 ODS SIZES 16 20 1 1 8 ODS HEATING COIL CONNECTIONS INCHES YMB HW SIZES 8 10 12 16 SIZE 20 7 8 ODS 1 1 8 ODS YORK INTERNATIONAL FORM 115 20 NOM4 105 FAN COILS START UP CHECKLIST INSTALL CHECKLIST Ensure condensate water will drain toward the drain connection An overflow
10. or connection of one electrical service Units with 15 kW and 20kW are provided with dual circuit breakers for the connection of two electrical services and units with 25k W are pro vided with three circuit breakers for the connection of three separate electrical services see Figure 2 amp 3 These units may be provided with a class 2 transformer for 24 volt control circuits Should any add on equip ment also have a class 2 transformer furnished care must be taken to prevent interconnecting outputs of the two transformers by using a thermostat with iso lating contacts FORM 115 20 NOM4 105 INSTALLATION CIRCUIT 1 CIRCUIT 2 LAL 13 14 mE GND GND E mn u peu E orcum pud I Il SN f ES E ED CIRCUIT 5 L3 L4 peleas EZ ercu 15 16 15 amp 20 KW Em FIELD WIRING NE FACTORY WIRING FIG 2 YMBE WIRING CONNECTIONS 15 amp 20 KW 24 VOLT 24V REMOTE CLASS 2 THERMOSTAT WIRING UNIT Y pip G po ee o 0 w W2 rp 0 w2 Y pez 0 COOLING CONTROL OUTDOOOR UNIT W2 SECOND STAGE ELECTRIC Sanaos FIELD WIRING FACTORY WIRING FIG 4 STANDARD LOW VOLTAGE WIRING FACTORY WIRING FIG 3 YMBE WIRING CONNECTIONS 25 KW T200 24V THERMOSTAT 1 1 i 44 1 1 1 1 o a J mg G Ho zl gt Vf Pe A
11. row cool ing coil 277V multi speed motor and up to 10kW of factory installed heat A unit mounted disconnect is standard The YMB HW Series 4 pipe fan coil includes a 4 row cooling coil a 2 3 or 4 row heating coil installed in the reheat position and a 120V multi speed motor YORK INTERNATIONAL HORIZONTAL APPLICATION These fan coil units are factory assembled for horizon tal left side down application without any modification required To convert to horizontal right side down remove horizontal drain pan and A coil assembly flip horizontal drain pan over to right side and reinstall horizontal drain pan and A coil into cabinet Secure forward edge of horizontal drain pan with angle bracket The unit should be leveled in such a way that there 1s slope toward the condensate drain nipple to assure positive drainage WIRING wiring must comply with the local and national code requirements Units are provided with wiring diagrams and nameplate data to provide information required for necessary field wiring All wiring must comply with local and national code requirements Any devices such as fan switches or thermostats that have been furnished by the factory for field installation must be wired in strict accordance with the wiring diagram that is sup plied with the unit Failure to do so could result in damage or injury YMBE SERIES Fan coil units with 10kW or less electric heat are provided with a terminal block f
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