York DM036 Installation Manual

Also see for DM 036: Technical guide

Contents

York DM036 Installation Manual Manual pdf 34 page image

5011492-XIM-B-081534 Johnson Controls Unitary ProductsPhasingYORK MODEL DM units are properly phased at the factory.Check for proper compressor rotation. If the blower orcompressors rotate in the wrong direction at start-up, theelectrical connection to the unit is misphased. Change theincoming line connection phasing to obtain proper rotation.(Scroll compressors operate in only one direction. If the scroll isdrawing low amperage, has similar suction and dischargepressures, or producing a high noise level, the scroll ismisphased).Table 21: Belt Drive Motor And Drive DataMODEL BLOWERRANGE (RPM)MOTOR1 ADJUSTABLE MOTOR PULLY FIXED BLOWER PULLY BELTHP RPM FRAMESIZESERVICEFACTORDESIG-NATIONPITCH DIA. BORE PITCH DIA. BORE PITCHLENGTH DESIG-NATIONmm inch mm inch mm inch mm inch mm inch5 TON 812-1102 1.5 1450 56 1.0 IVL44 69-97 2.8-3.8 22 7/8 127 5.0 25 1 922 36.3 A356 TON 948-1227 1.5 1450 56 1.0 IVM50 86-112 3.4-4.4 22 7/8 132 5.2 25 1 947 37.3 A361. All motors have solid bases and are inherently protected. These motors can be selected to operate into their service factor because theyare located in the moving air, upstream of any heating device.Table 22: Static ResistancesDESCRIPTIONRESISTANCE, PaM3/S0.47 0.57 0.66 0.75 0.85 0.94 1.03 1.13 1.23 1.32 1.42ECONOMIZER1,2 17.4 19.8 22.3 27.3 32.2 37.2 42.2 49.6 57.0 64.5 74.4ELECTRIC HEATERS1 7-15KW 10.0 12.4 14.9 17.4 19.8 24.8 29.8 34.7 39.7 47.1 54.620-30KW 14.9 17.4 19.8 22.3 27.3 32.2 37.2 42.2 49.6 57.0 64.5BOTTOM DUCT CONNECTIONS1 14.9 17.4 19.8 22.3 24.8 27.3 29.8 34.7 39.7 47.1 54.6COOLING ONLY3 19.8 25.0 29.8 34.7 39.7 44.6 49.6 57.0 64.5 71.9 79.4DESCRIPTIONRESISTANCE, IWGCFM1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000ECONOMIZER1,2 0.07 0.08 0.09 0.11 0.13 0.15 0.17 0.20 0.23 0.26 0.30ELECTRIC HEATERS1 7-15KW 0.04 0.05 0.06 0.07 0.08 0.10 0.12 0.14 0.16 0.19 0.2220-30KW 0.06 0.07 0.08 0.09 0.11 0.13 0.15 0.17 0.20 0.23 0.26BOTTOM DUCT CONNECTIONS1 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.14 0.16 0.19 0.22COOLING ONLY3 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.23 0.26 0.29 0.321. Deduct these resistance values from the available external static pressure shown in SUPPLY AIR BLOWER PERFORMANCE Tables.2. The pressure through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air ductsystem is less than 62.0 Pa [0.25 IWG], the unit will deliver less M3/S or CFM during full economizer operation.3. Add these resistance values to the available static resistance values on SUPPLY AIR BLOWER PERFORMANCE Tables.Scroll compressors require proper rotation to operatecorrectly. Units are properly phased at the factory. Donot change the internal wiring to make the blower,condenser fans, or compressor rotate correctly.