Table of Contents
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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)
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
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
349687-JTG-A-1007
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Table of Contents
Related Manuals for Johnson Controls Series 20 J 15 DJ
Summary of Contents for Johnson Controls Series 20 J 15 DJ
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Page 1: Description
349687-JTG-A-1007 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. TECHNICAL GUIDE 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: Table Of Contents
27 FOUR AND SIX POINT LOADS ....34 COOLING CAPACITIES FOR J25DJ ... . . 13 Johnson Controls Unitary Products... -
Page 3: Product Nomenclature
M = Options 1, 2, 3, & 4 Z = Options 3, 4 & 5 Options 1 = Disconnect 4 = Smoke Detector R.A. 2 = Non-Pwr'd Conv. Outlet 5 = Pwr'd Conv. Outlet 3 = Smoke Detector S.A. Johnson Controls Unitary Products... -
Page 4: Features
Advanced Controls - Unit control boards have stan- two heating sections for two equal stages of capacity dardized a number of features previously available only control. Each section includes a durable heat exchanger as options or by utilizing additional controls. Johnson Controls Unitary Products... -
Page 5: Factory-Installed Options
SINGLE INPUT ELECTRONIC ENTHALPY ECONO- tively). MIZERS - Includes a slide-in / plug-in damper assembly with fully modulating spring-return motor actuator capa- The rainhood is painted to match the basic unit and must be field-assembled before installing. Johnson Controls Unitary Products... - Page 6 (and not eliminates erosion of insulation material and contamina- the motor) for diagnostic purposes. tion of the air stream. Johnson Controls Unitary Products...
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Page 7: Field-Installed Accessories
LCCS single zone, • BAROMETRIC RELIEF DAMPER - This damper acces- change-over bypass and VAV systems. sory can be used to relieve internal building air pressure on units with an economizer without power exhaust. This Johnson Controls Unitary Products... - Page 8 BURGLAR BARS - Mount in the supply and return • PHASE MONITORS - Designed to prevent unit damage. openings to prevent entry into the duct work. The phase monitor will shut the unit down in an out-of- phase condition. Johnson Controls Unitary Products...
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Page 9: Sound Power Rating
EER = Energy Efficiency Ratio at full load - the cooling capacity in Btu’s per hour (Btuh) divided by the power input in watts, expressed in Btuh per watt (Btuh/watt). IPLV = Integrated Part Load Value. Johnson Controls Unitary Products... -
Page 10: Cooling Capacities For J15Dj
The capacities are gross ratings. For net capacity, deduct air blower motor, MBh = 3.415 x kW. Refer to the appropriate Blower Performance table for the kW of the supply air blower motor. These ratings include the condenser fan motors (total 1 kW) and the compressor motors but not the supply air blower motor. Johnson Controls Unitary Products... -
Page 11: Cooling Capacities For J18Dj
The capacities are gross ratings. For net capacity, deduct air blower motor, MBh = 3.415 x kW. Refer to the appropriate Blower Performance table for the kW of the supply air blower motor. These ratings include the condenser fan motors (total 1 kW) and the compressor motors but not the supply air blower motor. Johnson Controls Unitary Products... -
Page 12: Cooling Capacities For J20Dj
The capacities are gross ratings. For net capacity, deduct air blower motor, MBh = 3.415 x kW. Refer to the appropriate Blower Performance table for the kW of the supply air blower motor. These ratings include the condenser fan motors (total 1 kW) and the compressor motors but not the supply air blower motor. Johnson Controls Unitary Products... -
Page 13: Cooling Capacities For J25Dj
The capacities are gross ratings. For net capacity, deduct air blower motor, MBh = 3.415 x kW. Refer to the appropriate Blower Performance table for the kW of the supply air blower motor. These ratings include the condenser fan motors (total 1 kW) and the compressor motors but not the supply air blower motor. Johnson Controls Unitary Products... -
Page 14: Altitude Correction Factors
This value must be corrected for elevation. Example 2: A system, located at 5,000 feet of elevation, is to BHP at 5,000 ft = 3.2 x .832 = 2.66 deliver 6,000 CFM at a static pressure of 1.5". Use the unit Johnson Controls Unitary Products... -
Page 15: Altitude/Temperature Conversion
349687-JTG-A-1007 ltitude/Temperature Conversion Factor SEA LEVEL TEMPER TURE (°F) FIGURE 2 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Johnson Controls Unitary Products... -
Page 16: Supply Air Blower Performance (15 Ton) - Cooling Only 180 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 17: Supply Air Blower Performance (17.5 Ton) - Cooling Only 210 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 18: Supply Air Blower Performance (20 Ton) - Pg. # Cooling Only 240 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 19: Supply Air Blower Performance (15 Ton) - Gas Heat 180 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 20: Supply Air Blower Performance (17.5 Ton) - Gas Heat 210 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 21: Supply Air Blower Performance (20 Ton) - Gas Heat 240 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 22: Supply Air Blower Performance (25 Ton) - Gas Heat 300 Mbh - Bottom Duct Connections
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total static pressure of the blower. * Do NOT close the pulley below 1 turn open. ** Factory setting. Johnson Controls Unitary Products... -
Page 23: Blower Motor And Drive Data
MEDIUM 4900 0.77 3900 0.79 3500 0.82 2900 0.85 4400 0.72 3700 0.74 3000 0.78 Power exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection. The factory setting. Johnson Controls Unitary Products... -
Page 24: Dj Electrical Data Without Powered Convenience Outlet
43.2 18.0 21.7 43.2 12.8 10.0 36.0 43.3 66.6 54.0 65.0 77.5 72.0 86.6 99.1 None 35.0 18.0 17.3 35.0 10.3 36.0 34.6 53.6 54.0 52.0 62.2 72.0 69.3 79.5 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products... - Page 25 18.0 21.7 71.0 19.6 19.3 36.0 43.3 78.3 54.0 65.0 89.1 72.0 86.6 110.7 None 57.0 18.0 17.3 57.0 15.8 15.4 36.0 34.6 62.6 54.0 52.0 71.2 72.0 69.3 88.5 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
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Page 26: Dj Electrical Data With Powered Convenience Outlet
48.2 18.0 21.7 48.2 12.8 10.0 36.0 43.3 72.9 54.0 65.0 83.7 72.0 86.6 105.4 None 39.0 18.0 17.3 39.0 10.3 36.0 34.6 58.6 54.0 52.0 67.2 72.0 69.3 84.5 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products... - Page 27 18.0 21.7 76.0 19.6 19.3 36.0 43.3 84.5 54.0 65.0 95.3 72.0 86.6 117.0 None 61.0 18.0 17.3 61.0 15.8 15.4 36.0 34.6 67.6 54.0 52.0 76.2 72.0 69.3 93.5 NOTE 1: HACR Type per NEC. Johnson Controls Unitary Products...
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Page 28: Dj Voltage Limitations
OPERATING ELECTRIC HEATER WEIGHTS 54 KW (LBS.) 72 KW HOT GAS BYPASS SUPPLY FAN VFD See Table 23 ROOF CURB BAROMETRIC DAMPER ECONOMIZER / MOTORIZED DAMPER RAIN HOOD ECONOMIZER / POWER EXHAUST RAIN HOOD WOOD SKID Johnson Controls Unitary Products... -
Page 29: Typical J**Dj Field Wiring Diagram
VOLTAGE PLIER 5.0 hp 1.00 7.5 hp 0.92 10.0 hp 0.92 15.0 hp 0.92 W/MANUAL BYPASS 5.0 hp 7.5 hp 10.0 hp 15.0 hp CONTROL WIRING POWER WIRING FIGURE 3 - TYPICAL J**DJ FIELD WIRING DIAGRAM Johnson Controls Unitary Products... -
Page 30: Front View Dimensions
One-inch gas piping NPT required. Opening in the bottom of the unit can be located by the slice in the insulation. All entry holes should be field sealed to prevent rain NOTE: water entry into the building. Johnson Controls Unitary Products... -
Page 31: Rear View Dimensions
Connect ductwork to the flanges on those panels. openings are closed with sheet metal covers except when the unit includes a power exhaust option. The covering consists of a heavy black paper composition. Replace the side supply and return air compartment panels. Johnson Controls Unitary Products... -
Page 32: Unit Dimensions J15, 18, 20 & 25 Dj
Return Air Compartment) 36-5/8” 1“ CONDENSATE DRAIN 16-1/8” (Must be trapped) 5” 28-3/16” 92” REAR VIEW LH VIEW DETAIL “Y” UNIT WITH RAIN HOODS FIGURE 6 - UNIT DIMENSIONS J15, 18, 20 & 25 DJ (RAINHOOD) Johnson Controls Unitary Products... -
Page 33: Unit Center Of Gravity
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... -
Page 34: Four And Six Point Loads
J15DJ Gas 2660 J18DJ Gas 2928 J20DJ Gas 2960 J25DJ Gas 3046 J15DJ Elec 2460 J18DJ Elec 2728 J20DJ Elec 2760 J25DJ Elec 2846 Note: These weights are with economizer and high option heat (gas or electric). Johnson Controls Unitary Products... -
Page 35: Unit Roof Curb Dimensions
FIGURE 11 - ROOF CURB DUCT OPENINGS DIMENSION The 2” space between the ducts allows for “jumping” an existing roof joist. FIGURE 12 - CUT AWAY OF ROOF CURB Johnson Controls Unitary Products... -
Page 36: Typical Unit Wiring Diagram
Jumper is required for any combination of R, RC, or RH. OCC is an output from the thermostat to indicate the Occupied condition. X is an input to the thermostat to display Error Status conditions. FIGURE 13 - TYPICAL UNIT WIRING DIAGRAM Johnson Controls Unitary Products... -
Page 37: Guide Specifications
GENERAL installed accessories. The units shall be factory wired, piped, Units shall be manufactured by Johnson Controls in an ISO charged with R-22 refrigerant and factory tested prior to ship- 9001 certified facility. - Page 38 HGBP shall be a standard shall provide timed control of evaporator fan functioning and feature on VAV models and an optional feature on burner ignition. Heating section shall be provided with the fol- CV models. lowing minimum protection: Johnson Controls Unitary Products...
- Page 39 Dampers shall fully close on air damper assembly to take in CFM of outdoor air to power loss. meet the minimum ventilation requirement of the condi- tioned space during normal operation. During econo- Johnson Controls Unitary Products...
- Page 40 Subject to change without notice. Printed in U.S.A. 349687-JTG-A-1007 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing Johnson Controls Unitary Products 5005 York Drive...
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