Inc. Air Conditioner User Manual

ManualsBrandsJohnson Controls ManualsAir CompressorJ15

349687-JTG-A-1007

FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE

TECHNICAL GUIDE

SERIES 20

SINGLE PACKAGE GAS/ELECTRIC UNITS

AND SINGLE PACKAGE AIR

CONDITIONERS

J15, 18, 20 & 25 DJ

15 & 25 NOMINAL TONS

12.00 EER (15 TONS), 11.70 EER (17.5 TONS),

11.3 EER (20 TONS), 10.5 EER (25 TONS)

DESCRIPTION

Johnson Controls Series 20 J**DJ units are convertible single

package high efficiency rooftops. All models have indepen-

dent dual refrigerant circuits for efficient part load operation.

Although the units are primarily designed for curb mounting

on a roof, they can also be slab-mounted at ground level or

set on steel beams above a finished roof.

All units include:

• Powder Paint finish that meets ASTM-B-117 750 hour

salt spray standards

• Two-stage cooling provided by dual independent

refrigeration circuits with expansion valves, filter-driers, high

and low pressure/loss of charge switches and freezestats

• Scroll compressors

• Two-stage heating provided by dual independent heat

exchangers with aluminized steel tubes, redundant gas

valves, spark ignition with induced draft logic

• Permanently lubricated motors

• Bottom or side air discharge configuration capability

(field convertible)

• Belt Drive Blower Motor with high static drive option

• Constant supply air volume (CV) with optional variable

air volume (VAV)

• Manufactured under the quality standards of ISO9001

• Zero-25% fixed air damper with hood

• Copper tube/aluminum fin coils

• Hinged filter access and tool free latched doors

• Hinged tool free blower, blower motor, filters and electri-

cal panel access

• Rigging holes in base rails for lifting

• Single point power connection

• Complete factory package - tested, charged and wired

• CSA agency approvals on all units

WARRANTY

• One-year parts warranty

• A Five-year parts warranty on the compressors and

electric heat elements

• Ten-year parts warranty on the gas-fired heat

exchangers

Summary of content (40 pages)

PAGE 1
349687-JTG-A-1007 DESCRIPTION TECHNICAL GUIDE SERIES 20 Johnson Controls Series 20 J**DJ units are convertible single package high efficiency rooftops. All models have independent dual refrigerant circuits for efficient part load operation. Although the units are primarily designed for curb mounting on a roof, they can also be slab-mounted at ground level or set on steel beams above a finished roof.
PAGE 2
349687-JTG-A-1007 TABLE OF CONTENTS DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Tbl. # PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . 3 8 ALTITUDE CORRECTION FACTORS . . . . . . . . . . . . 14 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9 SUPPLY AIR BLOWER PERFORMANCE (15 TON) COOLING ONLY 180 MBH - BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 FACTORY-INSTALLED OPTIONS . . . . . . . . . . .
PAGE 3
49687-JTG-A-1007 PRODUCT NOMENCLATURE 15-25 Ton Series 20 Model Number Nomenclature J15 D J N24 A 2 A AA 1 0 1 2 4 A Nominal Cooling Capacity Product Style J15 = 15 Ton J18 = 17.5 Ton J20 = 20 Ton J25 = 25 Ton A = Style A Configuration Options (not required for all units) These four digits will not be assigned until a quote is requested, or an order placed. SS Drain Pan Product Category Johnson UNT 1126 Controller (N2 protocol), DFS, APS D = A/C, Single Pkg.
PAGE 4
349687-JTG-A-1007 FEATURES • Low Ambient - An integrated low-ambient control allows all units to operate in the cooling mode down to 0ºF outdoor ambient without additional assistance. Optionally, the control board can be programmed to lockout the compressors when the outdoor air temperature is low or when free cooling is available. • Anti-Short Cycle Protection - To aid compressor life, an anti-short cycle delay is incorporated into the standard controls.
PAGE 5
349687-JTG-A-1007 UNIT FIGURE 1 - UNIT CUTAWAY with aluminized steel or optional stainless steel tubes, a redundant gas valve, spark ignition, power venting, an ignition module for 100% shut-off and all of the safety controls required to meet the latest ANSI standards. ble of introducing up to 100% outdoor air with nominal 1% leakage type dampers. The enthalpy system contains one sensor that monitors the outdoor air and determines when the air is cool enough and dry enough to provide free cooling.
PAGE 6
349687-JTG-A-1007 • POWER EXHAUST - Our economizer options are available with power exhaust. Whenever the outdoor air intake dampers are opened for free cooling, the exhaust fan will be energized to prevent the conditioned space from being over-pressurized during economizer operation. BAS-ready economizer actuators have an adjustable auxiliary end-switch to provide a range of damper positions available to energize power exhaust.
PAGE 7
349687-JTG-A-1007 • SMOKE DETECTORS - (supply air & return air) The smoke detectors stop operation of the unit by interrupting power to the control board if smoke is detected within the air compartment. • Johnson UNT 1126 Rooftop Controller - N2 protocol with air proving and dirty filter sensors. Hardware contains generic application logic; field engineering and/or modification may be required.
PAGE 8
349687-JTG-A-1007 • accessory includes a rain hood, a bird screen and a fully assembled damper. With bottom duct connections, the damper should be mounted over the opening in the return air panel. With horizontal ductwork, the accessory should be mounted on the return air duct.
PAGE 9
349687-JTG-A-1007 TABLE 1: SOUND POWER RATING1 ESP UNIT SIZE SOUND POWER (db 10-12 Watts) BLOWER Octave Band Centerline Frequency (Hz) CFM IWG RPM BHP 63 125 250 500 1,000 2,000 4,000 8,000 SWL dB(A) dB(A) @ 10Ft.2 J15DJ 6,000 1.00 1,080 4.60 99 99 89 82 84 77 72 67 89 56 J18, 20 DJ 8,000 1.00 1,120 6.65 102 102 92 85 87 80 75 70 92 59 J25DJ 10,000 1.30 1160 12.5 108 108 98 91 93 86 81 76 98 65 1.
PAGE 10
349687-JTG-A-1007 TABLE 4: COOLING CAPACITIES FOR J15DJ Air on Evaporator Coil CFM 4500 5250 6000 6600 7200 4500 5250 6000 6600 7200 4500 5250 6000 6600 7200 1. 2. 10 WB (°F) Total Total2 Cap.1 Input (MBH) (kW) 86 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 206.8 187.4 169.3 166.8 212.8 192.8 174.2 171.6 218.9 198.3 179.2 176.5 224.3 203.2 183.6 180.9 229.7 208.1 188.1 185.3 11.94 11.64 11.37 11.36 12.00 11.70 11.43 11.42 12.06 11.76 11.49 11.48 12.14 11.83 11.57 11.
PAGE 11
349687-JTG-A-1007 TABLE 5: COOLING CAPACITIES FOR J18DJ Air on Evaporator Coil CFM 6000 6500 7000 7875 8750 6000 6500 7000 7875 8750 6000 6500 7000 7875 8750 1. 2. WB (°F) Total Total2 Cap.1 Input (MBH) (kW) 86 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 238.9 221.2 207.4 197.6 246.1 227.9 213.7 203.6 253.4 234.6 220.0 209.6 258.4 239.3 224.4 213.8 263.5 243.9 228.7 217.9 14.24 13.83 13.57 13.52 14.36 13.95 13.69 13.64 14.48 14.06 13.80 13.75 14.56 14.14 13.88 13.82 14.
PAGE 12
349687-JTG-A-1007 TABLE 6: COOLING CAPACITIES FOR J20DJ Air on Evaporator Coil CFM 6000 7000 8000 8700 9400 6000 7000 8000 8700 9400 6000 7000 8000 8700 9400 1. 2. 12 WB (°F) Total Total2 Cap.1 Input (MBH) (kW) 86 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 273.1 248.6 231.2 216.6 278.7 253.8 236.0 221.1 284.4 259.0 240.8 225.6 291.0 265.0 246.4 230.8 297.7 271.0 252.0 236.1 16.90 16.43 16.44 15.98 16.96 16.49 16.50 16.04 17.02 16.55 16.56 16.10 17.43 16.95 16.96 16.
PAGE 13
349687-JTG-A-1007 TABLE 7: COOLING CAPACITIES FOR J25DJ Air on Evaporator Coil CFM 7500 8750 10000 11250 12500 7500 8750 10000 11250 12500 7500 8750 10000 11250 12500 1. 2. WB (°F) Total Total2 Cap.1 Input (MBH) (kW) 86 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57 332.2 327.2 321.0 313.6 329.6 324.6 318.4 311.1 326.9 321.9 315.8 308.5 333.6 328.6 322.3 314.9 340.4 335.2 328.8 321.3 21.58 21.26 20.60 20.57 22.39 22.06 21.37 21.34 23.20 22.86 22.15 22.12 23.42 23.07 22.
PAGE 14
349687-JTG-A-1007 CFM, STATIC PRESSURE, AND POWER - ALTITUDE AND TEMPERATURE CORRECTIONS order to use the indoor blower tables for high altitude applications, certain corrections are necessary. The information below should be used to assist in application of product when being applied at altitudes at or exceeding 1000 feet above sea level. A centrifugal fan is a "constant volume" device. This means that, if the rpm remains constant, the CFM delivered is the same regardless of the density of the air.
PAGE 15
349687-JTG-A-1007 FIGURE 2 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Johnson Controls Unitary Products 15
PAGE 16
349687-JTG-A-1007 TABLE 9: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - COOLING ONLY 180 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 4500 ESP BHP 5250 KW ESP BHP 6000 KW ESP BHP 6750 KW ESP BHP 7200 KW ESP BHP KW 208 VOLT AND STANDARD DRIVE 850 6.0** 0.9 2.4 2.2 0.7 3.0 2.7 0.5 3.2 2.9 - - - - - - 870 5.5 1.0 2.5 2.3 0.8 3.1 2.8 0.6 3.5 3.1 0.2 4.1 3.7 - - - 915 4.5 1.1 2.6 2.4 0.9 3.4 3.0 0.7 3.7 3.3 0.3 4.
PAGE 17
349687-JTG-A-1007 TABLE 10: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - COOLING ONLY 210 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 6000 ESP 7000 BHP KW ESP BHP 8000 KW ESP BHP 9000 KW ESP BHP KW 208 VOLT AND STANDARD DRIVE 870 6.0** 0.4 2.1 1.8 0.1 2.3 2.0 - - - - - - 900 5.0 0.8 3.2 2.7 0.5 3.5 2.9 0.2 3.8 3.2 - - - 930 4.0 1.1 4.1 3.4 0.9 4.5 3.8 0.6 4.9 4.1 0.1 5.1 4.3 950 3.0 1.3 4.6 3.9 1.1 5.1 4.
PAGE 18
349687-JTG-A-1007 TABLE 11: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - COOLING ONLY 240 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 6000 ESP 7000 8000 BHP KW ESP BHP KW ESP BHP 9000 KW ESP BHP 9400 KW ESP BHP KW 208 VOLT AND STANDARD DRIVE 870 6.0** 0.4 2.1 1.8 0.1 2.3 2.0 - - - - - - - - - 900 5.0 0.8 3.2 2.7 0.5 3.5 2.9 0.2 3.8 3.2 - - - - - - 930 4.0 1.1 4.1 3.4 0.9 4.5 3.8 0.6 4.9 4.1 0.1 5.1 4.
PAGE 19
349687-JTG-A-1007 TABLE 12: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - GAS HEAT 180 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 4500 ESP BHP 5250 KW 6000 6750 7200 ESP BHP KW ESP BHP KW ESP BHP KW ESP BHP KW - 208 VOLT AND STANDARD DRIVE 850 6.0** 0.9 2.4 2.1 0.6 2.9 2.6 0.3 3.4 3.0 - - - - - 870 5.5 1.0 2.5 2.2 0.7 3.0 2.7 0.4 3.5 3.1 - - - - - - 915 4.5 1.1 2.6 2.4 0.8 3.1 2.8 0.5 3.6 3.2 0.2 4.1 3.
PAGE 20
349687-JTG-A-1007 TABLE 13: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - GAS HEAT 210 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 6000 ESP 7000 8000 9000 BHP KW ESP BHP KW ESP BHP KW ESP BHP KW - 208 VOLT AND STANDARD DRIVE 870 6.0** 1.3 3.6 3.0 0.7 4.3 3.7 0.2 5.1 4.3 - - 900 5.0 1.4 3.8 3.2 0.9 4.7 4.0 0.4 5.6 4.7 - - - 930 4.0 1.6 4.1 3.4 1.1 5.0 4.2 0.6 5.9 5.0 0.1 6.7 5.7 950 3.0 1.7 4.2 3.6 1.3 5.1 4.
PAGE 21
349687-JTG-A-1007 TABLE 14: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - GAS HEAT 240 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 6000 ESP BHP 7000 KW 8000 9000 9400 ESP BHP KW ESP BHP KW ESP BHP KW ESP BHP KW - 208 VOLT AND STANDARD DRIVE 870 6.0** 1.3 3.6 3.0 0.7 4.3 3.7 0.2 5.1 4.3 - - - - - 900 5.0 1.4 3.8 3.2 0.9 4.7 4.0 0.4 5.6 4.7 - - - - - - 930 4.0 1.6 4.1 3.4 1.1 5.0 4.2 0.6 5.9 5.0 0.1 6.7 5.
PAGE 22
349687-JTG-A-1007 TABLE 15: SUPPLY AIR BLOWER PERFORMANCE (25 TON) - GAS HEAT 300 MBH - BOTTOM DUCT CONNECTIONS BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN)* CFM 7500 ESP BHP 8750 KW ESP BHP 10000 KW ESP BHP 11250 KW ESP BHP 12500 KW ESP BHP KW 208 VOLT AND STANDARD DRIVE 975 6.0 1.2 5.9 4.9 5.0 7.3 6.0 - - - - - - - - - 1005 5.0 1.4 6.2 5.1 0.7 7.7 6.3 - - - - - - - - - 1040 4.0 1.6 6.6 5.4 0.9 8.1 6.7 0.2 9.7 8.0 - - - - - - 1070 3.
PAGE 23
349687-JTG-A-1007 TABLE 16: BLOWER MOTOR AND DRIVE DATA MODEL SIZE DRIVE MOTOR1 BLOWER RANGE (RPM) HP FRAME EFF. (%) ADJUSTABLE MOTOR PULLEY DESIGNATION OUTSIDE DIA. (IN.) PITCH DIA. (IN.) BORE DESIG(IN.) NATION Standard 850/1065 15 TON 17.5 & 20 TON High Static 5 184 T 83 1VP56 5.35 4.3-5.32 1-1/8 7.5 213 T 89 1VP68 6.75 5.5-6.52 1-3/8 965/1190 Standard 870/1025 High Static 950/1120 Standard 975/1165 25 TON 1. 2. High Static 1140/1365 15 254 T 91 1VP75X 7.5 6.2-7.
PAGE 24
349687-JTG-A-1007 TABLE 19: J**DJ ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET COMPRESSORS MODEL (TONNAGE) VOLTAGE RLA EACH LRA EACH ID CONV OD FAN BLOWER OUTLET MOTORS MOTOR MODEL AMPS FLA EACH FLA 208 22.4 164 2.1 15.4 0.0 230 22.4 164 2.1 15.4 0.0 460 10.9 100 1.1 7.2 0.0 575 8.3 78 0.9 5.9 0.0 208 25.6 190 2.1 20.0 0.0 230 25.6 190 2.1 20.0 0.0 460 12.8 95 1.1 10.0 0.0 575 10.3 75 0.9 8.2 0.
PAGE 25
349687-JTG-A-1007 TABLE 19: J**DJ ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET (CONTINUED) COMPRESSORS MODEL (TONNAGE) VOLTAGE RLA EACH LRA EACH ID CONV OD FAN BLOWER OUTLET MOTORS MOTOR MODEL AMPS FLA EACH FLA 208 33.6 225 3.7 20.0 0.0 230 33.6 225 3.7 20.0 0.0 460 17.3 114 1.9 10.0 0.0 575 13.5 80 1.5 8.2 0.0 208 47.1 245 3.7 38.6 0.0 230 47.1 245 3.7 38.6 0.0 460 19.6 125 1.9 19.3 0.0 575 15.8 100 1.5 15.4 0.
PAGE 26
349687-JTG-A-1007 TABLE 20: J**DJ ELECTRICAL DATA WITH POWERED CONVENIENCE OUTLET COMPRESSORS MODEL (TONNAGE) VOLTAGE RLA EACH LRA EACH ID CONV OD FAN BLOWER OUTLET MOTORS MOTOR MODEL AMPS FLA EACH FLA 208 22.4 164 2.1 15.4 10.0 230 22.4 164 2.1 15.4 10.0 460 10.9 100 1.1 7.2 5.0 575 8.3 78 0.9 5.9 4.0 208 25.6 190 2.1 20.0 10.0 230 25.6 190 2.1 20.0 10.0 460 12.8 95 1.1 10.0 5.0 575 10.3 75 0.9 8.2 4.
PAGE 27
349687-JTG-A-1007 TABLE 20: J**DJ ELECTRICAL DATA WITH POWERED CONVENIENCE OUTLET (CONTINUED) COMPRESSORS MODEL (TONNAGE) VOLTAGE RLA EACH LRA EACH ID CONV OD FAN BLOWER OUTLET MOTORS MOTOR MODEL AMPS FLA EACH FLA 208 33.6 225 3.7 20.0 10.0 230 33.6 225 3.7 20.0 10.0 460 17.3 114 1.9 10.0 5.0 575 13.5 80 1.5 8.2 4.0 208 47.1 245 3.7 38.6 10.0 230 47.1 245 3.7 38.6 10.0 460 19.6 125 1.9 19.3 5.0 575 15.8 100 1.5 15.4 4.
PAGE 28
349687-JTG-A-1007 TABLE 21: J**DJ VOLTAGE LIMITATIONS1 VOLTAGE LIMITATIONS VOLTAGE LIMITATIONS 1. VOLTAGE POWER SUPPLY MIN. MAX. 208/230-3-60 187 253 460-3-60 414 506 575-3-60 518 630 Utilization Range “A” in accordance with ARI Standard 110. TABLE 22: PHYSICAL DATA MODELS EVAPORATOR BLOWER EVAPORATOR COIL CONDENSER FAN (Four Per Unit) CONDENSER COIL COMPRESSOR (Qty. Per Unit) FILTERS CHARGE CENTRIFUGAL BLOWER (Dia. x Wd.) FAN MOTOR HP ROWS DEEP FINS PER INCH FACE AREA (Sq. Ft.
PAGE 29
349687-JTG-A-1007 TABLE 23: SUPPLY FAN VFD WEIGHTS, IN LBS. SUPPLY FAN MOTOR 230V 460V 575V W/O MANUAL BYPASS TABLE 24: ELECTRIC HEAT CORRECTION FACTORS NOMINAL VOLTAGE VOLTAGE kW CAP. MULTIPLIER 5.0 hp 25 25 30 7.5 hp 30 30 30 208 208 1.00 35 240 230 0.92 40 480 460 0.92 600 575 0.92 10.0 hp 30 15.0 hp 30 30 30 W/MANUAL BYPASS 5.0 hp 30 30 35 7.5 hp 35 35 35 10.0 hp 35 35 40 15.
PAGE 30
349687-JTG-A-1007 ECONOMIZER / MOTORIZED DAMPER FIXED OUTDOOR INTAKE AIR AND POWER EXHAUST RAIN HOODS (See detail Y) BLOWER COMPARTMENT ACCESS (Auxiliary) BLOWER MOTOR ACCESS (Location of Optional VFD Bypass) DOT PLUG (For pressure drop reading) BLOWER ACCESS (Location of Optional VFD) COMPRESSOR ACCESS 180-19/32 52-5/8 GAS OR ELECTRIC HEAT ACCESS COIL GUARD KIT VENT AIR OUTLET HOODS COMBUSTION AIR INLET HOOD 21.
PAGE 31
349687-JTG-A-1007 EVAPORATOR SECTION DOT PLUG (For pressure drop reading) 40-3/8" FILTER ACCESS SUPPLY AIR RETURN AIR COMPRESSOR ACCESS OUTDOOR AIR 40-1/2" SUPPLY AIR ACCESS Dimensions listed are for side duct flange openings; see Field Accessories for Side Duct Flange Kit. 18-5/8" 1" NPT FEMALE COND. DRAIN CONNECTION 27-3/4" RETURN AIR ACCESS 5-1/8" 39-5/8" REAR VIEW OUTDOOR AIR COMPARTMENT ACCESS FIGURE 5 - REAR VIEW DIMENSIONS NOTE:Units are shipped with the bottom duct openings covered.
PAGE 32
349687-JTG-A-1007 NOTE: ELEC / ELEC Models: Units and ductwork are approved for zero clearance to combustible material when equipped with electric heaters. TABLE 26: MINIMUM CLEARANCES LOCATION CLEARANCE Front 36” Rear 24” (Less Economizer) 49” (With Economizer) Left Side (Filter Access) 24” (Less Economizer) 36” (With Economizer)3 Right Side (Cond.
PAGE 33
349687-JTG-A-1007 FIGURE 7 - UNIT CENTER OF GRAVITY ROOF JACK INSTALLATION ROOF CURB INSTALLATION SLAB ON GROUND INSTALLATION FIGURE 8 - TYPICAL UNIT APPLICATIONS Johnson Controls Unitary Products 33
PAGE 34
9687-JTG-A-1007 B F E C D C A A D FIGURE 9 - B FOUR AND SIX POINT LOADS TABLE 27: FOUR AND SIX POINT LOADS 4 Point Loads (lbs) Total Shipping Weight A B C D J15DJ Gas 2660 454 847 885 474 J18DJ Gas 2928 510 954 954 510 J20DJ Gas 2960 516 964 964 516 J25DJ Gas 3046 531 992 992 531 J15DJ Elec 2460 419 784 819 438 J18DJ Elec 2728 476 888 888 476 J20DJ Elec 2760 481 899 899 481 J25DJ Elec 2846 496 927 927 496 Unit Size Total Shipping Weight A
PAGE 35
349687-JTG-A-1007 25-1/4" FIGURE 10 - UNIT ROOF CURB DIMENSIONS 2. The 58-1/2” overall dimension of the ducts allows ductwork penetration between roof joists that are spaced on 72” centers. Note: Ducts can be installed into the curb from the roof. All electrical and gas line connections can be made inside the curb. FIGURE 11 - ROOF CURB DUCT OPENINGS DIMENSION 1. The 2” space between the ducts allows for “jumping” an existing roof joist.
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349687-JTG-A-1007 THERMOSTAT TERMINALS CONTROL TERMINAL BLOCK W1 W1 W2 1 W2 Y1 Y1 Y2 G 2 OCC P G P1 R Y2 Smoke Detector X C R 4 SD RC OCC X 5 C R 3 SD SD 6 Jumper C 24 VAC Class 2 TERMINALS ON A LIMITED NUMBER OF THERMOSTATS 1 Second stage heating not required on single stage heating units. 2 Second stage cooling not required on single stage cooling units. 3 Jumper is required if there is no Smoke Detector circuit.
PAGE 37
349687-JTG-A-1007 GUIDE SPECIFICATIONS GENERAL Units shall be manufactured by Johnson Controls in an ISO 9001 certified facility. Series 20 J**DJ units are convertible single package units. All models have dual independent refrigerant circuits for efficient part load operation and maximum comfort control. Although the units are primarily designed for curb mounting on a roof, they can also be slab-mounted at ground level or set on steel beams above a finished roof.
PAGE 38
349687-JTG-A-1007 Units equipped with VFD’s shall have factory-installed manual bypass as an option. UNIT CONTROLS a. Unit shall be complete with self-contained low-voltage control circuit protected by a resetable circuit breaker on the 24-volt transformer side. b. Unit shall incorporate a lockout circuit which provides reset capability at the space thermostat or base unit, should any of the following standard safety devices trip and shut off compressor. c. Loss-of-charge/Low-pressure switch.
PAGE 39
349687-JTG-A-1007 a. Primary and auxiliary high-temperature limit switches. b. Induced draft motor speed sensor. c. Flame roll out switch (automatic reset). d. Flame proving controls. Unit shall have two independent stages of capacity. mizer operation, a mixed-air temperature control shall modulate the outdoor and return air damper assembly to prevent the supply air temperature from dropping below 55°F.
PAGE 40
OTHER PRE-ENGINEERED ACCESSORIES AVAILABLE OTHER FACTORY INSTALLED OPTIONS • ROOF CURB - 14" high, full perimeter curb with wood nailer (shipped knocked-down). • POWER EXHAUST OPTION - To work in conjunction with economizers. • 100% BAROMETRIC RELIEF DAMPER - Contains a rain hood, air inlet screen, exhaust damper and mounting hardware. Used to relieve internal air pressure through the unit.