Document dQdVLO4eE149VGR24oG9a4gQR

KRACK WINTER CONTROL Cootjuo Cofiootsea. AIR COOLED CONDENSERS Remold Type Ball-bearing fan shafts. Alemite external grease fittings for bearings and motor. Semi automatic external belt adjustment (Pat. ap plied for). Bulletin AC-457 ^Evaporator " -1'. ( -------------------^-. '( ) -r1 uV -) __ TweAnoSTAnc v... Sqlwhqio ? gjya teiow' V V ,5*7 I Ipk1 q JVMMl '"s WC-IIE.I2 VX-ZK LUZ. WC-31Zi.2>Zt REFRIGERANT-12 REFRIGERANT-22 WINTER CONTROL MODEL CAPACITY TENS WINTER CONTROL NO. CAPACITY TONS WC-I12 WC-212 C-312 1 thro 7.*4 7.S thru 14.9 IS thru 35. WC-122 WC-222 WC-322 1 thru 7.4 7.5 thru 14.9 IS thru 3S * For lager caperidea oec cnhiple mater cootroia ia parallel The need for a modulating device for use in conjunction with constant air flow air cooled condensers is gen erally recognized. Falling temperatures produce corre spondingly low operating pressure and eventually cause system problems, at the expansion valve. The Krack Winter Control, a completely automatic system; positively eliminates these conditions. Krack winter control consists of three valves. The first, designated as Valve L in the accompanying diagram controls pressure in the condenser itself by filling or emptying same-in accordance with pressure variation. *L* LIQUID FROM CONDENSER 7/8* I.D. Sw. 7/8* l.D. S*. 1-1/8* I.D. Sw. CONNECTION DATA *G* HOT GAS FROM COMPRESSOR DISCR. 7/8* l.D. Sw. 7/8* I.D. Sw. 1-1/8* I.D. Sw. C LIQUID TO RECEIVQt 7/8*. I.D. Sw. 7/8* I.D. S*. 1-1/0* I.D. Sw. The second or Valve G controls pressure in the receiver by using discharge line gas in accordance with pres sure variation therein. The third, a check valve desig nated as C, prevents liquid escape from receiver to condenser under any condition. Settings for the valves indicated are approximately as follows: . Valve L Valve G "12" 105# 95# "22" 180# 160# i Conversion factors for various tempera. ture differences between entering air and condensing temperature. Conversion factors for suction ternperatures lower than 40 F. at various condensing temperatures. I. Air-cooled condenser specification chart based on 90 F. ambient air and 110 F. con densing temperature. l CONDENSING TEMPERATURE - - CORRECTION FACTOR aosonsma tcbpkiatubb 4JS mi BULB 95 90 ' 95 100 10S 100 rn 116.0. r m. 9 1.34 2.1 ios 110 US oiscenes pR&ssott 126. 2 136 146-1 137 1 21X6 23S.7 243.1 26X6 1 .00 3 .34 2.0 .60 t.oo 1.34 2.00 .61 .80 1.00 1.34 2.0 .57 .67 .80 1.00 1.34 125 _ 130 141.4 sa.3 50 57 67 80 1. 00 166. 2 M.6 ,4S .50 .57 .47 .80 SUCTION TEMPERATURE -- CORRECTION FACTOR awsasuto AUCT10II TBIPEtATUAR TBraxnu -40 -30 -20 -10 0 10 20 30 40 100" 110 120 130 1.25 1.22 1.31 1.26 1.37 132 1.43 1 37 1.17 1.13 1.21 i.n 1.23 140 1.30 1.2S 1.1 1.06 1.03 1.0 .98 1.13 1.09 1.06 1.03 1.0 1.1S l.U 1.(8 1.05 1.02 1.20 1,16 1 12 k.08 1.0S MODO. NOB. CAPACTTT SVWTORAT0R 00 MBIBIT at0 some* 110 CDND. ' TONS BTO/HR. C101D 1 12.000 CjqHD C3CMD 2 24.000 3 36,000 CS0HD 5 60.000 COIL A 6.75 81.000 C7SBD COIL 8 7.5 90,000' CD1L C 8.65 an. 94) CX00SD COIL B 10' COIL C 11.5 COIL A 13.4 106.000 106.000 12.000 138.000 161.000 CISOBO C30080 CDIL B CDIL C COIL A CDIL cdil c CDIL C290BD COIL aiiL COIL B CDIL 15 16.59 18 B 32.8 33.4 25 35.8 3) 33.1 1*0.000 198.000 216.000 240.000 ZT4.000 261.000 300.000 323.000 360.000 S91.500 C400BD 40 .480,000 CS00BD SO 600,000 COOOBD 60 730.000 AIR VQLUKB cm OTOR DATA RILL HP U)AD RPN (UP. PAH DATA operating * CHARGE TIP B CTA. DRIVE * Wl *12 *22* 1395 1/8 L 5 21GO 1/4 2.5 900 1/3 3.0 659 - 2-1/4 5.0 11100 1- 1/2 4. 4 1900 1-1/2 4.4 10700 1-1/2 4^4 16300 1-1/2 4.4 16000 1-1/2 4.4 1S800 172S0 1-1/2 4.4 1-1/2 4.4 167 SO 1-1/2 4.4 160SO 2 5.8 S100 - 2 8.3 3B000 3 8.1 2790 3 6.3 268 SO 2250 3 6.3 3 8.3 21350 3 8.3 31500 3 6.3 30SO0 5 13.0 56000 > 1/2 19.6 56000 7-V2 19.6 56000 7- 1/2 19.6 Direct 1140 16 I1C 15 X 2 Direct 1140 20 11 4.9 Direct 1140 22 It 7.7 Direct u 2-23 11 1X7 4. 4 6.7 11. 2 Belt 17 25 42 4SS 15.5 14. 3 Belt 1725 42 435 IS. 6 14. 3 17 25 42 1725 17 25 48 Belt 435 15.5 Belt 435 21.6 Belt . 425 2L 4 14.3 19.7 B.7 17 25 48 17 25 48 Belt 435 21.4 B.7 Belt 450 38.4 35.4 17 25 48 17 25 48 Belt ' 450 38.4 Belt 49 SS.4 35.4 35. 4 17 25 >48 17 25 >48 Belt 425 42.3 Belt 435 42.3 39. a 29. 2 Belt 1725 >48 435 42.3 9. 2 Belt 1725 >48 4 56.5 52.3 Belt n 23 > 4 56.5 52-3 17 25 >48 17 25 >48 Belt 4 66.5 SX 3 Belt 49 79.0 73.0 1725 >46 17 25 >54 17 25 >54 1726 >54 Belt 49 79.0 73.0 gelt SW 105 98 Bett 610 140 130 Belt 630 . 210 195 APPGDX. SUPPING VBGBTS 1 230 380 SB0 800 830 B60 690 950 1010 ISO 190 IttO 1470 1530' 1590 . 1730 18 1940 2350 .259 3400 , 3600 3750 - `When using Krnck Winter Control, the condenser operetta? should be doubled end the receiver sized According!!. 1. Select from Table 1, Correction Fac tor applicable to condensing tempera ture and ambient temperature to be encountered on subject installation. 2. Obtain from Table 2. Correction Fac-' tor corresponding to suction tempera ture and condensing temperature at wtuch the equipment is designed to' operate. 3. Multiply Correction Factors obtained from Tables 1 and 2 by the Evaporator Load. 4. Select a KRACK Air Cooled Con denser from Table 3 having a nominal rating equal to or greater wan the fig ure arrind at in step 3. EXAMPLE To select a KRACK Air Cooled Condenser for: * 120 Condensing Temperature - - ' 90s Ambient Temperature 10s Suction Temperature 240.000 BTU/Hr. EVAPORATOR LOAD 1. Correction factor from Tabfe 1 for 120 condensing temperature and 90 ambient is. .67. 2. Correction factor from Table 2 for 10 suction and 120 condensing tem perature is 1.11. 3. Multiply evaporator loadby correc tion factors selected: 24D.ODO x .67 r 1.11 = 178,488 BTU/Hr. .4 From Table 3 -- Model C150BD with Coil B is selected. Available With All Steel Hoi-Dipped Galvanized "B" Coil Elements, Far Use in Auxiliary Services. 9