York SUNLINE 2000 D1EE 048 Installation Instruction
                | |
HEAT ANTICIPATOR SETPOINTSIt is important that the anticipator setpoint be correct. Too highof a setting will result in longer heat cycles and a greatertemperature swing in the conditioned space. Reducing thevalue below the correct setpoint will give shorter “ON” cyclesand may result in the lowering of the temperature within theconditioned space. Refer to Table 10 for the required heatanticipator setting.CHECKING SUPPLY AIR CFMThe speed of the supply air blower will depend on the requiredCFM, the unit accessories and the static resistances of both thesupply and the return air duct systems. With this information,the speed for the supply air blower can be determined from thestatic resistance and blower performance data on Tables 3 thru6.Knowing the required blower RPM and the blower motor HP,the speed setting for the direct-drive supply air motor can bedetermined.The setting (turns open) for the optional belt-drive supply airmotor pulley can be determined from Table 11.OPTIONAL BELT-DRIVE BLOWERAll units with belt-drive blowers have single-speed motors. Thevariable pitch pulley on the blower motor can be adjusted toobtain the desired supply air CFM. Refer to Table 7 for blowermotor and drive data. The tension on the belts should beadjusted as shown in Figure 7.Start the supply air blower motor. Adjust the resistances in boththe supply and the return air duct systems to balance the airdistribution throughout the conditioned space. The jobspecifications may require that this balancing be done bysomeone other than the equipment installer.To check the supply air CFM after the initial balancing has beencompleted:1. Remove the (two) " dot plugs from the holes located onthe filter access panel side of the unit.2. Insert at least 8" of 1/4 inch tubing into each of these holesfor sufficient penetration into the air flow on both sides ofthe evaporator coil.NOTE: The tubes must be inserted and held in a positionperpendicular to the air flow so that velocity pres-sure will not affect the static pressure readings.3. Using an inclined manometer, determine the pressure dropacross a dry indoor coil. Since the moisture on an indoorcoil may vary greatly, measuring the pressure drop acrossa wet coil under field conditions would be inaccurate. Toassure a dry coil, the compressors should be de-energizedwhile the test is being run.4. Knowing the pressure drop across a dry coil, the actualCFM through the unit can be determined from the curve inFigure 8.WARNING: Failure to properly adjust the total system air quan-tity can result in poor system performance.NOTE: DE-ENERGIZE THE COMPRESSORS BEFORETAKING ANY TEST MEASUREMENTS TO ASSUREA DRY INDOOR COIL.035-12046-003-A-0204Unitary Products Group 13TURNSOPEN*BLOWER DRIVE RANGE (RPM)3 TON 4 TON 5 TON5432107808429049661028109079085692298810541120850924998107212461220*Pulley can be adjusted in half-turn increments.TABLE 11 - BELT-DRIVE SUPPLY AIRMOTOR PULLEY ADJUSTMENTS P A N L E N G T H D E F L F O R C E * N E V E R L O O S E N ( A ) ( C ) * ( D ) C A U T IO N P r o c e d u r e fo r a d j u s ti n g b e l t te n s i o n : 1 . L o o s e n n u t ( D ) fr o m th e m o to r m o u n t. 2 . N e v e r l o o s e n n u ts ( C ) fr o m e a c h o th e r w h i l e l o o s e n i n g n u t ( D ) . 3 . A d j u s t th e te n s i o n b y tu r n i n g b o l t ( B ) . 4 . D o n o t l o o s e n th e fo u r n u ts ( to p a n d b o tto m ) ( A ) ; u n l e s s a d d i ti o n a l te n s i o n i n g d i s ta n c e i s r e q u i r e d ; i m m e d i a te l y r e - ti g h te n th e s e b o l ts i f l o o s e n e d . 5 . U s e a b e l t te n s i o n c h e c k e r to a p p l y a p e r p e n d i c u l a r fo r c e to o n e b e l t a t th e m i d p o i n t o f th e s p a n a s s h o w n . T h e d e fl e c ti o n fo r c e s h o u l d b e a p p l i e d u n ti l a s p e c i fi c d e fl e c ti o n d i s ta n c e o f 4 m m ( 5 /3 2 " ) i s o b ta i n e d . T o d e te r m i n e th e d e fl e c ti o n d i s ta n c e fr o m n o r m a l p o s i ti o n , u s e a s tr a i g h t e d g e fr o m s h e a v e to s h e a v e a s a r e fe r e n c e l i n e . T h e r e c o m m e n d e d d e fl e c ti o n fo r c e i s a s fo l l o w s : T e n s i o n n e w b e l ts a t th e m a x . d e fl e c ti o n fo r c e r e c o m m e n d e d fo r th e b e l t s e c ti o n . C h e c k th e b e l t te n s i o n a t l e a s t tw o ti m e s d u r i n g th e fi r s t 2 4 h o u r s o f o p e r a ti o n . A n y r e - te n s i o n i n g s h o u l d fa l l b e tw e e n th e m i n . a n d m a x . d e fl e c ti o n fo r c e v a l u e s . 6 . A fte r a d j u s ti n g , r e - ti g h te n n u t ( D ) a g a i n s t th e m o to r m o u n t ta k i n g c a r e n o t to l o o s e n n u ts ( C ) . ( B ) FIG. 7 - BELT ADJUSTMENT00.10.20.30.40.50.60.7750 1250 1750 2250 2750 3250 3750036 048NOMINAL CFMPRESSURE DROP (IWG) 060FIG. 8 - PRESSURE DROP ACROSS A DRYEVAPORATOR COIL VS SUPPLY AIR CFM,WITHOUT AIR FILTERS |
Related manuals for York SUNLINE 2000 D1EE 048
York Sunline 2000 Installation Instruction
York SUNLINE 2000 Installation Instruction
York SUNLINE 2000 D3CE 036 Installation Instruction
York SUNLINE DEE Installation Instruction
York SUNLINE ULTRA D1HG 048 Installation Instruction
York SUNLINE PLUS D2EG 048 Installation Instruction
York SUNLINE 2000 D2CG 072 Installation Instructions Manual
York SUNLINE PLUS D1EG090 Installation Instruction
York Sunline 2000 D3CG090 Installation Instructions Manual
York STELLAR 2000 D3GH018 Installation Instruction
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine