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349215-JIM-B-1008

Johnson Controls Unitary Products

TABLE 7: PHYSICAL DATA

MODELS

J15DJ

J18DJ

J20DJ

J25DJ

EVAPORATOR

BLOWER

CENTRIFUGAL BLOWER (Dia. x Wd.)

15x15

18x15

FAN MOTOR HP

5.0

7.5

EVAPORATOR

COIL

ROWS DEEP

FINS PER INCH

13.5

FACE AREA (Sq. Ft.)

CONDENSER FAN

(Four Per Unit)

PROPELLER DIA. (In.) (Each)

FAN MOTOR HP (Each)

1/3

3/4

NOM. CFM TOTAL (Each)

4,000

5,000

CONDENSER

COIL

ROWS DEEP

FINS PER INCH

FACE AREA (Sq. Ft.)

63.8

COMPRESSOR

(Qty. Per Unit)

SCROLL

FILTERS

QUANTITY PER UNIT (12" X 24" X 2"

TOTAL FACE AREA (Sq. Ft.)

CHARGE

REFRIGERANT
22 (Lb./Oz.)

SYSTEM No.1

23/0

24/0

23/8

SYSTEM No. 2

23/8

24/0

23/8

OPERATING

WEIGHTS

(LBS.)

BASIC UNIT

COOLING ONLY

2260

2540

2560

2660

GAS / ELECTRIC

N24

2460

2740

2760

2860

N32

2500

2780

2800

2900

OPTIONS

DOUBLE WALL

260

ECONOMIZER

160

ECONOMIZER WITH
POWER EXHAUST

245

MOTORIZED DAMPER

150

ELECTRIC HEATER

18 KW

36 KW

54 KW

72 KW

HOT GAS BYPASS

SUPPLY FAN VFD

See Table 8

ACCE

SSORIES

ROOF CURB

185

BAROMETRIC DAMPER

ECONOMIZER / MOTORIZED
DAMPER RAIN HOOD

ECONOMIZER / POWER
EXHAUST RAIN HOOD

WOOD SKID

220

TABLE 8: SUPPLY FAN VFD WEIGHTS, IN LBS.

SUPPLY FAN MOTOR

230V

460V

575V

W/O MANUAL BYPASS

5.0 hp

7.5 hp

10.0 hp

15.0 hp

W/MANUAL BYPASS

5.0 hp

7.5 hp

10.0 hp

15.0 hp

Содержание 20 Series

Страница 1: ...URE 6 INSTALLATION 7 OPERATION 45 START UP COOLING 53 START UP GAS HEAT 53 TROUBLESHOOTING 56 See the following page for a complete Table of Contents NOTES CAUTIONS AND WARNINGS The installer should p...

Страница 2: ...STATIC PRESSURE AND POWER ALTITUDE AND TEMPERATURE CORRECTIONS 32 PHASING 44 CHECKING SUPPLY AIR CFM 44 AIR BALANCE 44 OPERATION 45 SEQUENCE OF OPERATIONS OVERVIEW 45 COOLING SEQUENCE OF OPERATION 45...

Страница 3: ...VALVE AND CONTROLS 52 25 TYPICAL GAS VALVES 54 26 PROPER FLAME ADJUSTMENT 55 27 TYPICAL FLAME APPEARANCE 55 28 UNIT CONTROL BOARD 65 LIST OF TABLES Tbl Pg 1 UNIT APPLICATION DATA 8 2 CONTROL WIRE SIZE...

Страница 4: ...e personnel should install repair main tain or service this equipment Observe all precautions in the literature on labels and tags accompanying the equipment whenever working on air conditioning equip...

Страница 5: ...ould pay particular attention to the words NOTE CAUTION and WARNING Notes are intended to clarify or make the installation easier Cau tions are given to prevent equipment damage Warn ings are given to...

Страница 6: ...ies 20 Model Number Nomenclature ZZ If desired option combination is not listed above ZZ will be assigned and configuration options will be located in digits 15 18 A No Options Installed Installation...

Страница 7: ...lectrical Code C22 1 Current Gas Installation Codes CSA B149 1 Local plumbing and waste water codes Other applicable local codes Refer to the Unit Application Data table and to the Gas Heat Applicatio...

Страница 8: ...nit is to be installed on a roof curb or special frame other than a Unitary Products roof curb gasketing must be applied to all surfaces that come in contact with the unit underside TABLE 1 UNIT APPLI...

Страница 9: ...provisions for ade quate combustion and ventilation air in accordance with Section 5 3 Air for Combustion and Ventilation of the National Fuel Gas Code ANSI Z223 1 in U S A or Sections 7 2 7 3 or 7 4...

Страница 10: ...ange surfaces on the hood prior to installing the hood Extend gasketing 1 4 inch beyond the top and bottom of the two side flanges to insure adequate sealing Adjusting the damper to the desired air fl...

Страница 11: ...porator coil and must be kept clean or replaced with same size and type Dirty filters will reduce the capacity of the unit and will result in frosted coils or safety shutdown Minimum filter area and r...

Страница 12: ...2 p r o v i d e a r e l a y o u tp u t to c l o s e th e o u td o o r e c o n o m i z e r d a m p e r s w h e n th e th e r m o s ta t s w i tc h e s to th e s e t b a c k p o s i ti o n 2 4 V o l t T...

Страница 13: ...Can ada and or local codes Refer to the Dimensions Figure 13 for installation location If any of the wire sup plied with the unit must be replaced replacement wire must be of the type shown on the wi...

Страница 14: ...All units require a one inch pipe connection at the entrance fitting Maximum capacity of pipe in cubic feet of gas per hour Based upon a pressure drop of 0 3 inch water column and 0 6 specific gravity...

Страница 15: ...of the gas lines external to the unit have been purged of air 5 The gas supply should be a separate line and installed in accordance with all safety codes as prescribed under Limitations After the ga...

Страница 16: ...gas as it will quickly dissolve white lead or most standard commercial compounds Shellac base compounds such as Rectorseal 5 are satisfactory for this type of gas Check all connections for leaks when...

Страница 17: ...ze and de energize terminals R to G MINIMUM POSITION ADJUSTMENT With thermostat set to indoor fan on position or termi nals R to G energized turn the Minimum Position Adjusting screw located on the da...

Страница 18: ...vert this pressure measure ment to a proportional 0 5 VDC electrical output Pressure transmitting plastic tubing 1 4 diameter must be field supplied and installed from the transducer to both the ductw...

Страница 19: ...h limit set point is adjustable between 0 WC and 5 WC with the factory default setting of 4 5 WC If the duct static pressure reaches the high limit set point then the supply fan motor will be shutdown...

Страница 20: ...imum clearances to allow for adequate internal cooling of the drive during operation The unit comes with a mounting bracket installed in the Blower Access compartment which may accommodate other vendo...

Страница 21: ...ng pressure modulating bypass control valve installed on the system 1 discharge line is used to divert high tem perature high pressure refrigerant around the TXV in order to maintain a desired minimum...

Страница 22: ...T T1 AQ1 AQ SO SO SR SR A B C D TR TR1 24 Vac HOT 24 Vac COM EF EF1 2 3 4 5 1 Exhaust Air Adjustment Screw Exhaust Air LED Damper Min Position Screw Indoor Air Quality Max Adjustment Screw Indoor Air...

Страница 23: ...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 6 Point Loads lbs A B C D E F J15DJ Gas 2660 302 316 453 590 565 434 J18...

Страница 24: ...E REFRIGERANT 22 Lb Oz SYSTEM No 1 23 0 24 0 23 8 23 8 SYSTEM No 2 23 8 24 0 23 8 23 8 OPERATING WEIGHTS LBS BASIC UNIT COOLING ONLY 2260 2540 2560 2660 GAS ELECTRIC N24 2460 2740 2760 2860 N32 2500 2...

Страница 25: ...100 1 1 7 2 0 0 None 0 0 36 1 45 E18 18 0 1 21 7 36 1 45 E36 36 0 2 43 3 63 1 70 E54 54 0 2 65 0 74 0 90 E72 72 0 2 86 6 95 6 110 575 8 3 78 0 9 5 9 0 0 None 0 0 28 2 35 E18 18 0 1 17 3 29 0 35 E36 3...

Страница 26: ...80 1 5 8 2 0 0 None 0 0 44 6 50 E18 18 0 1 17 3 44 6 50 E36 36 0 2 34 6 53 6 60 E54 54 0 2 52 0 62 2 70 E72 72 0 2 69 3 79 5 90 J25 25 208 47 1 245 3 7 38 6 0 0 None 0 0 159 4 200 E18 13 5 1 37 5 159...

Страница 27: ...100 1 1 7 2 5 0 None 0 0 41 1 50 E18 18 0 1 21 7 42 3 50 E36 36 0 2 43 3 69 4 70 E54 54 0 2 65 0 80 2 90 E72 72 0 2 86 6 101 9 110 575 8 3 78 0 9 5 9 4 0 None 0 0 32 2 40 E18 18 0 1 17 3 34 0 40 E36...

Страница 28: ...80 1 5 8 2 4 0 None 0 0 48 6 60 E18 18 0 1 17 3 48 6 60 E36 36 0 2 34 6 58 6 60 E54 54 0 2 52 0 67 2 70 E72 72 0 2 69 3 84 5 90 J25 25 208 47 1 245 3 7 38 6 10 0 None 0 0 169 4 200 E18 13 5 1 37 5 16...

Страница 29: ...T ACCESS DOT PLUG For pressure drop reading BLOWER COMPARTMENT ACCESS Auxiliary C GAS SUPPLY ENTRY CONTROL BOX ACCESS VENT AIR OUTLET HOODS BLOWER MOTOR ACCESS Location of Optional VFD Bypass BLOWER A...

Страница 30: ...wer exhaust option The covering consists of a heavy black paper composition 3 Replace the side supply and return air compartment panels For side duct applications 1 Replace the side panels on the supp...

Страница 31: ...ES 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 Coil 36 Below Unit1 1 Units may be installed o...

Страница 32: ...the static pressure and BHP Since no temperature data is given we will assume an air temperature of 70 F Table 11 shows the correction factor to be 0 832 Corrected static pressure 1 5 x 0 832 1 248 I...

Страница 33: ...349215 JIM B 1008 Johnson Controls Unitary Products 33 FIGURE 16 ALTITUDE TEMPERATURE CONVERSION FACTOR...

Страница 34: ...0 0 9 5 2 4 7 0 7 5 7 5 1 208 VOLT AND HIGH STATIC DRIVE 965 6 0 1 2 2 9 2 6 1 0 3 6 3 2 0 8 4 0 3 6 0 5 4 7 4 2 0 4 5 0 4 4 980 5 5 1 3 3 0 2 7 1 1 3 7 3 3 0 9 4 1 3 7 0 6 4 8 4 3 0 5 5 1 4 6 1025 4...

Страница 35: ...4 5 9 5 0 980 5 0 1 6 5 3 4 5 1 4 5 8 4 9 1 2 6 3 5 3 0 7 6 9 5 8 1010 4 0 1 8 5 8 4 9 1 7 6 3 5 3 1 5 6 9 5 8 1 0 7 5 6 3 1020 3 5 1 9 6 1 5 1 1 8 6 5 5 5 1 6 7 1 6 0 1 1 7 8 6 6 1035 3 0 2 0 6 2 5...

Страница 36: ...9 1 2 6 3 5 3 0 7 6 9 5 8 0 2 7 3 6 1 1010 4 0 1 8 5 8 4 9 1 7 6 3 5 3 1 5 6 9 5 8 1 0 7 5 6 3 0 5 7 9 6 7 1020 3 5 1 9 6 1 5 1 1 8 6 5 5 5 1 6 7 1 6 0 1 1 7 8 6 6 0 6 8 3 7 0 1035 3 0 2 0 6 2 5 2 1 9...

Страница 37: ...8 3 4 1 0 4 4 3 9 0 8 5 0 4 5 0 6 5 6 5 0 208 VOLT AND HIGH STATIC DRIVE 965 6 0 1 2 2 7 2 5 0 9 3 2 2 9 0 6 3 7 3 3 0 4 4 4 3 9 0 2 5 0 4 5 980 5 5 1 3 2 9 2 6 1 0 3 4 3 0 0 7 3 8 3 4 0 5 4 5 4 0 0 3...

Страница 38: ...5 1 0 2 6 9 5 8 980 5 0 1 9 4 5 3 8 1 5 5 4 4 5 1 0 6 3 5 3 0 4 7 2 6 1 995 4 5 2 1 4 5 3 9 1 6 5 5 4 7 1 1 6 4 5 4 0 5 7 5 6 3 1025 3 5 2 3 4 9 4 1 1 8 5 8 4 9 1 3 6 7 5 7 0 7 8 0 6 7 1050 2 5 2 5 5...

Страница 39: ...980 5 0 1 9 4 5 3 8 1 5 5 4 4 5 1 0 6 3 5 3 0 4 7 2 6 1 0 1 8 5 7 1 995 4 5 2 1 4 5 3 9 1 6 5 5 4 7 1 1 6 4 5 4 0 5 7 5 6 3 0 2 8 6 7 3 1025 3 5 2 3 4 9 4 1 1 8 5 8 4 9 1 3 6 7 5 7 0 7 8 0 6 7 1050 2...

Страница 40: ...9 7 0 3 13 7 11 2 1215 4 0 2 7 8 6 7 0 2 1 10 4 8 5 1 4 12 3 10 1 0 6 14 3 11 7 1255 3 0 3 0 9 1 7 4 2 4 11 0 9 0 1 7 12 9 10 6 0 9 15 0 12 3 1290 2 0 3 2 9 5 7 8 2 7 11 5 9 4 2 0 13 5 11 1 1 2 15 6...

Страница 41: ...er performance table TABLE 20 POWER EXHAUST PERFORMANCE MOTOR SPEED STATIC RESISTANCE OF RETURN DUCTWORK IWG 0 2 0 3 0 4 0 5 0 6 CFM KW CFM KW CFM KW CFM KW CFM KW HIGH 5250 0 83 4500 0 85 4200 0 88 3...

Страница 42: ...e TXV s left to the factory setting If the TXV s have been adjusted in the field The charging chart may no longer apply FIGURE 18 CHARGING CHART 17 5 TON 17 5 Ton Charging Chart 100 150 200 250 300 35...

Страница 43: ...with the TXV s left to the factory setting If the TXV s have been adjusted in the field the charging chart may no longer apply FIGURE 20 CHARGING CHART 25 TON 25 Ton Charging Chart 100 150 200 250 30...

Страница 44: ...d 20 ton units and Model 1LD0435 for 25 ton units Refer to the Blower Motor and Drive Data Table 21 Note the following 1 The supply air CFM must be within the limitations shown in the Unit Application...

Страница 45: ...ESSORS BEFORE TAKING ANY TEST MEASURE MENTS TO ASSURE A DRY INDOOR COIL OPERATION SEQUENCE OF OPERATIONS OVERVIEW For these units the thermostat makes a circuit between R and Y1 for the first stage of...

Страница 46: ...cool ing the low voltage control circuit from R to G and Y1 is completed The UCB energizes the blower motor if the fan switch on the room thermostat is set in the AUTO position and drives the economi...

Страница 47: ...nt plus 5 F free cooling is available If free cooling is available with a Y1 call then the con trol modulates the economizer dampers to maintain the First Stage SAT Control setpoint plus or minus one...

Страница 48: ...ree times within two hours of operation the UCB will lock out the associated compres sor and flash a code Table 27 If the other compressor is inactive the condenser fans will be de energized LOW AMBIE...

Страница 49: ...blower motor If the second stage of heat is required heater con tactor 7M will be energized Note that on the 54 KW 240V heater heater contactors 7M 8M will be energized and on the 72 KW 240V heater he...

Страница 50: ...t motor control The draft motor control contacts close and start the draft motor As the speed of the draft motor reaches approximately 2500 RPM the cen trifugal switch contact located on the end of th...

Страница 51: ...shut down until the specified fan off delay for heating has been satisfied The UCB will de energize the blower motor When the thermostat calls for the first stage of heating the low voltage control c...

Страница 52: ...open It will continue to try and ignite the pilot for a maximum of 85 seconds then if the pilot flame is not detected the ignition control will lock out furnace operation until 24V power is removed fr...

Страница 53: ...Measure evaporator fan motor s amp draw 8 Set the room thermostat fan switch to off 9 Turn unit electrical power off OPERATING INSTRUCTIONS 1 Turn unit electrical power on 2 Set the room thermostat se...

Страница 54: ...as well as the supply piping 2 Check for correct manifold gas pressures See Checking Gas Input page 55 3 Check the supply gas pressure It must be within the limits shown on rating nameplate Supply pr...

Страница 55: ...t gas valve and downstream from the main manual shut off valve 3 Remove the gas piping closure panel 4 Disconnect wiring to the gas valves and spark ignit ors Remove the manifold burner gas valve asse...

Страница 56: ...GUIDE On calls for cooling if the compressors are operating but the supply air blower motor does not energize after a short delay the room thermostat fan switch is in the AUTO position 1 Turn the the...

Страница 57: ...at to the UCB 9 If 24 volts is present at the room thermostat but not at the UCB check for proper wiring between the thermostat and the UCB i e that the thermostat G terminal is connected to the G ter...

Страница 58: ...mper in the Mate N Lock plug and in the wiring from the Mate N Lock plug to the Y1 ECON terminal 13 For units with economizers If 24 volts is present at the Y1 OUT terminal check for 24 volts at the Y...

Страница 59: ...tween the LPS2 terminals 9 If 24 volts is present at the UCB Y2 terminal and none of the protection switches have opened the UCB may have locked out the compressor for repeat trips The UCB should be f...

Страница 60: ...h the last five alarms on the LED If the compressor is locked out remove any call for cooling This will reset any compressor lock outs NOTE While the above step will reset any lock outs compressor 2 w...

Страница 61: ...h VFD check that line voltage is being supplied to the M3 Auxiliary contacts Check for loose wiring between the contactor and the supply air blower motor 3 If M3 is pulled in and voltage is supplied a...

Страница 62: ...m thermostat for contact between R and G during W1 calls On calls for heating the supply air blower operates but the draft motor does not the room thermostat fan switch is in the AUTO position 1 The d...

Страница 63: ...d remove the pilot orifice from the pilot burner The orifice is removed in the direction opposite the flow of gas Inspect the orifice for obstruction If it is clear replace the main gas valve The igni...

Страница 64: ...me cases it may be necessary to zero the ASCD for the compressors in order to perform trouble shooting To reset all ASCDs for one cycle press and release the UCB TEST RESET button once Flash codes tha...

Страница 65: ...onds the display will revert to its normal display exiting the Option Setup mode When saving the control board only saves the parameters for the currently dis played mode Option Byte or Heat Delay HEA...

Страница 66: ...fusion a 1 flash flash code is not used TABLE 28 HEAT DELAY Heat Fan On Delay Heat Fan Off Delay Red LED 8 Red LED 4 Red LED 2 Red LED 1 60 180 On On On On 60 90 On On On Off 60 60 On On Off On 60 30...

Страница 67: ...349215 JIM B 1008 Johnson Controls Unitary Products 67...

Страница 68: ...change without notice Printed in U S A 349215 JIM B 1008 Copyright 2008 by Johnson Controls Inc All rights reserved Supersedes 349215 JIM A 1007 Johnson Controls Unitary Products 5005 York Drive Norma...

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