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50GS, 50GX
Single Packaged Electric Cooling Units
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Installation, Start-Up, and Operating Instructions
50GS Sizes 018-060, 50GX Sizes 024-060
NOTE: Read the entire instruction manual before starting the METERING DEVICE — ACUTROL DEVICE.............25
installation. LIQUID LINE STRAINER..............................................25
This symbol → indicates a change since the last issue. Troubleshooting............................................................................
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SLAB MOUNT Place the unit on a solid, level concrete pad that is a minimum of Before performing service or maintenance operations on 4 in. thick with 2 in. above grade (See Fig. 5B). The slab should system, turn off power to unit. Turn off accessory heater extend approximately 2 in. beyond the casing on all 4 sides of the power switch, if applicable. Electrical shock can cause unit. Do not secure the unit to the slab except when required by personal injury. local codes. Recognize safety informat
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REQUIRED CLEARANCE TO COMBUSTIBLE MATL. REQUIRED CLEARANCE FOR OPERATION AND SERVICING INCHES [mm] INCHES [mm] TOP OF UNIT...................................................................................14.00 [355.6] EVAP. COIL ACCESS SIDE............................................................36.00 [914.0] DUCT SIDE OF UNIT.........................................................................2.00 [50.8] POWER ENTRY SIDE...................................................................
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REQUIRED CLEARANCE TO COMBUSTIBLE MATL. REQUIRED CLEARANCE FOR OPERATION AND SERVICING INCHES [mm] INCHES [mm] TOP OF UNIT...................................................................................14.00 [355.6] EVAP. COIL ACCESS SIDE............................................................36.00 [914.0] DUCT SIDE OF UNIT.........................................................................2.00 [50.8] POWER ENTRY SIDE...................................................................
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HVAC unit HVAC unit base base Gask eting inner flange* Scre w Scre w Gask eting (NO TE A) inner flange* (NOTE A) *Gask eting *Gask eting outer flange outer flange Wood nailer* Wood nailer* Flashing field Flashing field supplied supplied Roofcurb* Roofcurb* Insulation (field Insulation (field supplied) supplied) Roofing mater ial Roofing mater ial field supplied field supplied Duct wo rk Duct wo rk field supplied field supplied Cant str ip Cant str ip field supplied field supplied Roof Roof
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12 y 43 x C00071 50GS 50GX CORNER # 018 024 030 036 042 048 060 024 030 036 042 048 060 1 58 60 59 62 76 69 84 76 84 85 71 78 85 2 47 50 48 50 50 45 54 49 60 60 55 56 66 3 55 56 56 58 71 88 106 57 61 64 85 80 108 4 94 94 95 98 97 122 145 88 86 90 110 112 140 TOTAL WEIGHT 254 260 258 268 294 324 389 270 291 299 321 326 399 Fig. 4B—50GS and 50GX Unit Corner Weights A C MAXIMUM ALLOWABLE DIFFERENCE (in.) B A-B B-C A-C 1/4 1/4 1/4 C99065 Fig. 5A—Unit Leveling Tolerances OPTIONAL OPTIONAL RETURN SUPP
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914-137" (36"-54") “A” “B” DETAIL A SCALE 0.250 TIGHTEN STRAPPING SECURELY WITH TENSION BUCKLE INSTALL SAFETY STRAPS TO RIGGING CLEVIS AT 4 RIGGING BRACKETS PLACE RIGGING BRACKET ASSEMBLY IN 4 RIGGING HOLES AND INSTALL TIE DOWN STRAP AROUND PERIMETER OF UNIT AND THROUGH SPACE IN BRACKET ASSEMBLY SEE DETAIL A C99066 MAXIMUM WEIGHT A B SIZE lb. kg in. mm. in. mm. UNIT 50GS 018 276 125.2 20 508.0 13 330.2 024 282 127.9 19 482.6 13 330.2 030 280 127.0 19 482.6 14 355.6 036 290 131.5 20 508.0 14 355.
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Table 1—Physical Data—Unit 50GS UNIT SIZE 018 024 030 036 042 048 060 NOMINAL CAPACITY (ton) 1-1/2 2 2-1/2 3 3-1/2 4 5 OPERATING WEIGHT (lb.) 254 260 258 268 294 324 389 COMPRESSOR Reciprocating Scroll Reciprocating REFRIGERANT (R-22) 2.6 3.5 3.65 4.4 6.4 5.1 7.4 Quantity (lb.) Accurater REFRIGERANT METERING DEVICE Orifice ID (in.) .034 .034 .034 .032 .034 .032 .030 CONDENSER COIL 1...17 1...17 1...17 1...17 1...17 1...17 2...17 Rows...Fins/in. 6.1 9.1 9.1 10.9 9.1 12.3 12.3 Face Area (sq. ft.)
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1” (25mm) MIN. TRAP OUTLET 2” (50mm) MIN. C99013 Fig. 7—Condensate Trap Table 3—Minimum Airflow for Safe Electric Heater Operation (Cfm) SIZE 018 024 030 036 042 048 060 700 800 1000 1200 1400 1600 2000 5. It is recommended that the unit base insulation around the perimeter of the vertical return-air opening be secured to the unit base with aluminum tape. Applicable local codes may require aluminum tape to prevent exposed fiberglass. 6. Coverbothhorizontalductopeningswiththeductcoversfrom the ac
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4. Connect L2 to pressure lug connection 23 of the compressor contactor. Three phase units: 1. Run the high-voltage (L1, L2, L3) and ground leads into the control box. 2. Connect ground lead to chassis ground connection. 3. Locate the black and yellow wires connected to the lines side of the contactor. 4. Connect field L1 to black wire on connection 11 of the compressor contactor. 5. Connect field wire L2 to yellow wire on connection 13 of the compressor contactor. 6. Connect field wire L3 to Bl
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Table 4—Electrical Data—50GS VOLTAGE COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY UNIT 50GS RANGE V-PH-HZ SIZE Min Max RLA LRA FLA FLA Nominal Kw* FLA MCA Max Fuse orCkt Bkr MOCP -/- -/- 13.9/13.9 20/20 — 3.8/5.0 18.1/20.8 24.8/28.3 25/30 — 018 208/230–1–60 187 254 9 45 0.8 1.8 5.4/7.2 26.0/30.0 34.7/39.8 35/40 — 7.5/10.0 36.1/41.7 47.4/54.3 50/60 — -/- -/- 18.8/18.8 25/25 — 3.8/5.0 18.1/20.8 25.1/28.5 25/30 — 024 208/230–1–60 187 254 12.8 61 0.8 2 5.4/7.2 2/30 35/40 35/40 — 7.5/10.0 36.1/41.7
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Table 5—Electrical Data—50GX VOLTAGE COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY RANGE UNIT 50GX V-PH-HZ Max Fuse SIZE * Min Max RLA LRA FLA FLA Nominal Kw FLA MCA or MOCP Ckt Bkr -/- -/- 16.5/16.5 20/20 — 3.8/5.0 18.1/20.8 25.1/28.5 30/30 — 024 208/230–1–60 187 253 10.9 54.0 0.9 2.0 5.4/7.2 26.0/30.0 35.0/40.0 35/40 — 7.5/10.0 36.1/41.7 47.6/54.6 50/60 — -/- -/- 19.8/19.8 25/25 — 3.8/5.0 18.1/20.8 25.2/28.7 25/30 — 208/230–1–60 187 253 13.5 73.0 0.8 2.1 5.4/7.2 26.0/30.0 35.1/40.1 40/45 — 7.5
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EXAMPLE: Supply voltage is 460-3-60. AB = 452 v LEGEND BC = 464 v AC = 455 v FLA — Full Load Amps LRA — Locked Rotor Amps 452 + 464 + 455 ® Average Voltage = MCA — Minimum Circuit Amps 3 MOCP — Maximum Overcurrent Protection 1371 RLA — Rated Load Amps = CKT BKR — Circuit Breaker 3 = 457 NOTES: Determine maximum deviation from average voltage. 1. In compliance with NEC (National Electrical Code) requirements (AB) 457 452=5v for multimotor and combination load equipment (refer to NEC (BC) 464 457=
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leak. Leak test all refrigerant tubing connections using START UP COOLING SECTION AND MAKE ADJUST- electronic leak detector, halide torch, or liquid-soap solu- MENTS tion. If a refrigerant leak is detected, see Check for Refrigerant Leaks section. c. Inspect all field- and factory-wiring connections. Be sure Complete the required procedures given in the Pre-Start- Up that connections are completed and tight. section before starting the unit. Do not jumper any safety deviceswhenoperatingtheunit.D
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C99003 Fig. 12—Wiring Diagram (208/230-60-1) 15
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C99004 Fig. 13—Wiring Diagram (208/230-60-3) 16
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C99005 Fig. 14—Wiring Diagram (460-60-3) 17
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Table 6—Color Coding for 208/230–V Motor Leads When evaluating the refrigerant charge, an indicated adjust- 3-SPEED 2-SPEED ment to the specified factory charge must always be very black = high speed black = high speed minimal.Ifasubstantialadjustmentisindicated,anabnormal blue = medium speed - condition exists somewhere in the cooling system, such as red = low speed red = low speed insufficient airflow across either coil or both coils. units. To change the speed, remove and replace with lead fo
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Table 8—Wet Coil Air Delivery (Deduct 10 percent for 208v)* Horizontal and Downflow Discharge Unit 50GS018-060 230 AND 460 VOLT External Static Pressure (in. wg) Motor Unit Speed 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Watts 227 212 196 177 165 153 ----- Low Cfm 1000 915 825 710 530 340 ----- Watts ----------- 018 Med Cfm ----------- Watts 287 275 266 253 242 234 226 ---- High Cfm 1150 1032 963 807 698 503 250 ---- Watts 280 275 270 267 264 262 260 ---- Low Cfm 880 825 765 693 600 450 281 --
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Table 9—Wet Coil Air Delivery (Deduct 10 percent for 208v)* Horizontal and Downflow Discharge Unit 50GX024-060 230 AND 460 VOLT External Static Pressure (in. wg) Motor Unit Speed 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Watts 281 282 281 278 276 ------ Low Cfm 833 776 702 638 554 Watts - - - 375 370 363 357 352 - - - 024 Med Cfm - - - 894 800 754 636 518 - - - Watts ----- 468 457 444 431 423 - High Cfm ----- 884 802 697 467 397 - Watts 246 244 243 241 ------- Low Cfm 910 806 749 680 ------- W
