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R-410A
J**ZT SERIES W/SMART EQUIPMENT™
3 - 5 Ton
60 Hertz
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preceding Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power And Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Optional Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Economizer Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Dry Bulb Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Single Enthalpy Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Dual Enthalpy Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Auto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1 Unit Shipping Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Condenser Covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Compressor Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Component Location (JA3ZT Shown) . . . . . . . . . . . . . . . . . . 7
5 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 JA3 thru JA5ZT Physical Dimensions . . . . . . . . . . . . . . . . . . 9
8 JA3 thru JA5ZT Unit Bottom Duct Openings . . . . . . . . . . . . 11
9 JA3 thru JA5ZT Unit Electrical Entry . . . . . . . . . . . . . . . . . . 12
10 JA3 thru JA5ZT Unit Side Duct Openings . . . . . . . . . . . . . . 12
11 JA3 thru JA5ZT Unit Left Duct Opening . . . . . . . . . . . . . . . . 13
12 JA3 thru JA5ZT Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . 13
13 JA3 thru JA5ZT Transition Roof Curb . . . . . . . . . . . . . . . . . 14
14 JA3 thru JA5ZT Roof Curb Cutaway . . . . . . . . . . . . . . . . . . 14
15 Side Panels With Hole Plugs . . . . . . . . . . . . . . . . . . . . . . . . 15
16 Return Downflow Plenum With Panel . . . . . . . . . . . . . . . . . . 15
1 JA3 thru JA5ZT Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . 7
2 Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 JA3 thru JA5ZT Unit Accessory Weights . . . . . . . . . . . . . . . . 9
4 JA3 thru JA5ZT Unit Physical Dimensions . . . . . . . . . . . . . . 10
5 JA3 thru JA5ZT Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 10
6 Side Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Left/End Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
10 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11 Electric Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . . . . 25
12 Gas Pipe Sizing - Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 26
13 Gas Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . . . . . . 27
14 Smart Equipment™ Economizer Board Details . . . . . . . . . . 32
15 Supply Air Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
16 Altitude/Temperature Correction Factors . . . . . . . . . . . . . . . 36
17 Airflow Performance - Side Duct Application . . . . . . . . . . . . . 39
TABLE OF CONTENTS
Free Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Airflow Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Checking Air Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Electric Heating Sequence Of Operations. . . . . . . . . . . . . . . . 46
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . . . . 46
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . . . . 47
Ignition Control Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Gas Heating Operation Errors . . . . . . . . . . . . . . . . . . . . . . . 48
Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Start-Up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Checking Gas Heat Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Control Board Navigation Components . . . . . . . . . . . . . . . . . . . . 52
Charging The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Start-Up Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
LIST OF TABLES
17 Discharge Panel In Place . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
18 Save Side Panels For Economizer Hood Tops . . . . . . . . . . 15
19 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
20 Field Wiring Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
21 Typical Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
22 Side Entry Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
23 Bottom Entry Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
24 Simplified VFD Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
25 SE-ECO1001-0 Economizer Controller . . . . . . . . . . . . . . . . 32
26 Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
27 Altitude/Temperature Correction Factors . . . . . . . . . . . . . . . 37
28 Dry Coil Delta P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
29 Typical Flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
30 Typical Two Stage Gas Valve . . . . . . . . . . . . . . . . . . . . . . . 52
31 Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
LIST OF FIGURES
18 Airflow Performance - Bottom Duct Application . . . . . . . . . . 40
19 RPM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
20 Indoor Blower Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 41
21 Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . . . . . 41
22 Motor Sheave Datum Diameters . . . . . . . . . . . . . . . . . . . . . . 43
23 Additional Static Resistance . . . . . . . . . . . . . . . . . . . . . . . . . 44
24 Electric Heat Limit Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
25 Electric Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . . . . 47
26 Gas Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . . . . . . . 49
27 Gas Rate Cubic Feet Per Hour . . . . . . . . . . . . . . . . . . . . . . . 50
28 Gas Heat Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
29 Smart Equipment™ UCB Details . . . . . . . . . . . . . . . . . . . . . 53
31 Ignition Control Flash Codes . . . . . . . . . . . . . . . . . . . . . . . . . 58
32 JA3ZT Charging Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
33 JA4ZT Charging Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
34 JA5ZT Charging Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
5370597-JIM-D-1019
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Table of Contents
Related Manuals for Johnson Controls J ZT Series
Summary of Contents for Johnson Controls J ZT Series
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Page 1: Table Of Contents
R-410A J**ZT SERIES W/SMART EQUIPMENT™ 3 - 5 Ton 60 Hertz TABLE OF CONTENTS General ..........2 Free Cooling Operation . -
Page 2: General
5370597-JIM-D-1019 General Johnson Controls J**ZT units are single package air conditioners with optional gas heating designed for outdoor Before performing service or maintenance operations on installation on a rooftop or slab and for non-residential use. unit, turn off main power switch to unit. Electrical shock These units can be equipped with factory or field installed could cause personal injury. - Page 3 Renewal Parts As soon as a unit is received, it should be inspected for possible For authorized replacement parts call Johnson Controls, Inc. damage during transit. If damage is evident, the extent of the National Source 1 Parts outlet 1-866-523-9670.
- Page 4 5370597-JIM-D-1019 Nomenclature ® 3-5 Ton Johnson Controls Model Number Nomenclature JA3 ZT C A 2 A 1 Product Generation Nominal Cooling Capacity 1 = First Generation 2 = Second Generation JA3 = 3 Ton JA4 = 4 Ton JA5 = 5 Ton...
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Page 5: Installation
Figure 2: Condenser Covering construction has not contaminated the unit. NOTE: Should the unit be used during the construction phase the standard limited warranty provisions go into effect once the unit is placed into operation. Johnson Controls Ducted Systems... -
Page 6: Limitations
In U.S.A.: department for Ducted Systems @ 1-877-874-SERV for National Electrical Code, ANSI/NFPA No. 70 - Latest guidance. Additional accessories may be needed for Edition stable operation at temperatures below 30° F. Johnson Controls Ducted Systems... -
Page 7: Location
Where a choice of location is possible, position the unit on either north or east side of building. Maintain level tolerance to 1/2” across the entire width and length of unit. Suitable for mounting on roof curb. Johnson Controls Ducted Systems... -
Page 8: Rigging And Handling
Table 2: Weights and Dimensions Size Weight (lbs.) Center of Gravity 4 Point Load Location (lbs.) Model (Tons) Shipping Operating 42.4 24.7 42.5 25.5 41.6 25.5 Johnson Controls Ducted Systems... -
Page 9: Ja3 Thru Ja5Zt Physical Dimensions
(8 tube). 29.69 15.25 15.38 59.00 15.38 2X Ø 24.38 SEE DETAIL A FOR GAS INLET 11.38 SEE DETAIL B 59.00 4.19 FOR DRAIN LOCATION LEFT 27.31 21.19 89.00 FRONT Figure 7: JA3 thru JA5ZT Physical Dimensions Johnson Controls Ducted Systems... -
Page 10: Ja3 Thru Ja5Zt Unit Physical Dimensions
1. Units must be installed outdoors. Over hanging structure or shrubs should not obscure condenser air discharge outlet. 2. Units may be installed on combustable floors made from wood or class A, B or C roof covering materials. Johnson Controls Ducted Systems... -
Page 11: Ja3 Thru Ja5Zt Unit Bottom Duct Openings
14 1/2 25 9/16 Bottom gas supply entry 16 3/8 18 1/16 FRONT TOP VIEW Bottom power, control and convenience outlet wiring entry 3X Ø 0.875 Ø 2.469 Figure 8: JA3 thru JA5ZT Unit Bottom Duct Openings Johnson Controls Ducted Systems... -
Page 12: Ja3 Thru Ja5Zt Unit Electrical Entry
Figure 10: JA3 thru JA5ZT Unit Side Duct Openings Table 6: Side Duct Dimensions Dimension (in.) Unit Model Number JA3ZT 27 3/4 12 1/16 27 1/2 JA4ZT 27 3/4 12 1/16 27 1/2 JA5ZT 27 3/4 12 1/16 27 1/2 Johnson Controls Ducted Systems... -
Page 13: Ja3 Thru Ja5Zt Unit Left Duct Opening
JA4ZT 30.357 13.365 22.516 JA5ZT 30.357 13.365 22.516 RIGHT 80-5/8 INSULATED DECK UNDER CONDENSER SECTION SUPPLY RETURN 2 TYP. 50-1/2 INSULATED DECK UNDER COMPRESSOR SECTION FRONT 8 or 14 Figure 12: JA3 thru JA5ZT Roof Curb Johnson Controls Ducted Systems... -
Page 14: Ja3 Thru Ja5Zt Transition Roof Curb
3.75” WOOD NAILER 3.56” UNIT BASE RAILS 14” 8“ MIN. ABOVE FINISHED ROOF COUNTERFLASHING CURB FRAME CAN’T STRIP INSULATION AND ROOFING MATERIAL INSULATION ROOF DECK AND SUPPORT STRUCTURE Figure 14: JA3 thru JA5ZT Roof Curb Cutaway Johnson Controls Ducted Systems... -
Page 15: Ductwork
Condensate Drain Figure 15: Side Panels With Hole Plugs The side condensate drain is reversible and maybe re-oriented to NOTE: Orientation. Panel is “insulation” side up. the rear of the cabinet to facilitate condensate piping. A Johnson Controls Ducted Systems... -
Page 16: Compressors
R-22. No other refrigerant may be used in this system. The compressor also uses a polyolester (POE oil), Mobil 3MA Do not loosen compressor mounting bolts. POE. This oil is extremely hygroscopic, meaning it absorbs water Johnson Controls Ducted Systems... -
Page 17: Filters
If installing a disconnect (field the capacity of the unit and result in frosted coils or safety supplied or Johnson Controls supplied accessory), refer to shutdown. Refer to physical data tables, for the number and Figure 4 for the recommended mounting location. -
Page 18: Field Wiring Disconnect
Refer to Electrical Data Table 9 to size power or the basepan inside the curb. wiring, fuses, and disconnect switch. TERMINAL BLOCK TB1 FACTORY OR FIELD GROUND SUPPLIED DISCONNECT THREE PHASE POWER SUPPLY Figure 20: Field Wiring Disconnect Johnson Controls Ducted Systems... -
Page 19: Control Wire Sizes
Jumper is required for any co of R, RC, or RH. OCC is an output from the thermostat to indicate the Occupied X is an input to the thermostat to display Error Status condi ons. Figure 21: Typical Control Wiring Johnson Controls Ducted Systems... -
Page 20: Electrical Data
28.9 38.7 41.5 None 11.7 13.5 13.3 15.6 38.9 15.0 14.4 20.5 22.8 20.0 19.2 26.6 28.8 24.0 23.1 31.4 33.6 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Ducted Systems... - Page 21 28.9 40.0 42.8 None 11.9 13.7 13.6 16.9 38.9 15.0 14.4 20.8 23.0 20.0 19.2 26.8 29.0 24.0 23.1 31.6 33.9 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Ducted Systems...
- Page 22 28.9 45.0 47.7 None 15.7 17.5 18.3 20.6 38.9 15.0 14.4 25.5 27.8 20.0 19.2 31.6 33.8 24.0 23.1 36.4 38.6 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Ducted Systems...
- Page 23 28.9 46.3 49.0 None 15.9 17.7 18.6 20.9 38.9 15.0 14.4 25.8 28.0 20.0 19.2 13.8 34.0 24.0 23.1 36.6 38.9 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Johnson Controls Ducted Systems...
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Page 24: Physical Data
Fins per inch Tube diameter (in./MM) .98/25 .98/25 .98/25 Circuitry Type 2-pass Microchannel 2-pass Microchannel 2-pass Microchannel EVAPORATOR COIL DATA Face area (Sq. Ft.) 10.56 10.56 10.56 Rows Fins per inch Tube diameter 0.375 0.375 0.375 Refrigerant control Johnson Controls Ducted Systems... -
Page 25: Optional Electric Heat
208/230-3-60 1020 1000 460-3-60 600-3-60 208/230-3-60 1280 1420 1400 1400 460-3-60 1400 1400 1400 1400 600-3-60 1400 1400 1400 208/230-3-60 1600 1600 1600 1600 1600 460-3-60 1600 1600 1600 1600 1600 600-3-60 1600 1600 1600 1600 Johnson Controls Ducted Systems... -
Page 26: Optional Gas Heat
NOTE: There may be a local gas utility requirement specifying a minimum diameter for gas piping. All units require a 3/4 inch pipe connection at the entrance fitting. Line should not be sized smaller than the entrance fitting size. Johnson Controls Ducted Systems... -
Page 27: Gas Heat Minimum Supply Air
Check all joints for leaks with soap solution or other material suitable for the purpose. NEVER USE A FLAME. All LP gas equipment must conform to the safety standards of the National Fire Protection Association. Johnson Controls Ducted Systems... -
Page 28: Options/Accessories
If factory installed, refer to installation. These heaters mount in the heat compartment with the instructions included with the outdoor air hood to complete the heating elements extending into the supply air chamber. All Johnson Controls Ducted Systems... -
Page 29: Simplified Vfd Wiring
Once a drive has been selected and installed, refer to the drive manufacturer's recommendations for proper fuse sizing. Johnson Controls Ducted Systems... -
Page 30: Economizer Sequences
The control determines the type of free cooling changeover based on which sensors are present and reliable. Conditions If at any time the economizer output goes above the minimum include: position the timer stops and resets when the economizer output returns to minimum position. Johnson Controls Ducted Systems... -
Page 31: Power Exhaust
Econo Damper Position For Exh Fan ON Percent Economizer Damper Position For Exhaust Fan On. g. Econo Damper Position For Exh Fan OFF Percent c. De-energizes exhaust fan when economizer output is below the Economizer Damper Position for Exhaust Fan Johnson Controls Ducted Systems... -
Page 32: Smart Equipment™ Economizer Board Details
Negative of the SA BUS communication Common for SA BUS power and circuit to the UCB. Through the unit wiring harness, may continue communication circuits on to the 4-stage board and/or fault detection & diagnostics board Johnson Controls Ducted Systems... - Page 33 24V~ IN Pin connections at right on upper edge of economizer board 24 VAC common connection to power the economizer board. 24 VAC transformer Common referenced to Connects through circuit traces to C/COM terminals and pins cabinet ground distributed on the economizer board. Johnson Controls Ducted Systems...
- Page 34 Connects through circuit trace to 24V~ IN pin HOT sensor BldgPres parameter reports input status (-.250-.250”/w/-.062- BLDG 0-5 VDC positive input from the Building .062kPa). Used for modulating power exhaust functions when PRES Pressure sensor ExFType selection is Modulating Damper or Variable Frequency Fan. Johnson Controls Ducted Systems...
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Page 35: Supply Air Limitations
J**ZT units are properly phased at the factory. Check for proper JA4 (4.0) 1200 2000 compressor rotation. If the blower or compressors rotate in the JA5 (5.0) 1500 2500 wrong direction at start-up, the electrical connection to the unit Johnson Controls Ducted Systems... -
Page 36: Altitude/Temperature Correction Factors
0.743 0.715 0.688 0.982 0.947 0.913 0.880 0.848 0.817 0.787 0.758 0.730 0.702 0.676 0.964 0.929 0.897 0.864 0.833 0.802 0.772 0.744 0.716 0.689 0.663 0.946 0.912 0.880 0.848 0.817 0.787 0.758 0.730 0.703 0.676 0.651 Johnson Controls Ducted Systems... -
Page 37: Altitude/Temperature Correction Factors
This value must be corrected for elevation. Example 2: A system, located at 5,000 feet of elevation, is to deliver 1,400 CFM at a static pressure of 1.5". Use the unit BHP at 5,000 ft. = 0.7 x .832 = 0.58 Johnson Controls Ducted Systems... - Page 38 5 Turns 4 Turns 3 Turns 2 Turns 1 Turn Fully Model (Tons) Sheave Sheave Open Open Open Open Open Open Closed 1.73 1VL40 AK61 1029 1089 2.30 1VP56 AK74 1035 1084 1134 1183 1232 1281 Johnson Controls Ducted Systems...
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Page 39: Airflow Performance - Side Duct Application
1. Blower performance includes gas heat exchangers and 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. 4. Field Supplied Drive. Johnson Controls Ducted Systems... -
Page 40: Airflow Performance - Bottom Duct Application
1. Blower performance includes gas heat exchangers and 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. 4. Field Supplied Drive. Johnson Controls Ducted Systems... -
Page 41: Air Balance
To assure a dry coil, the compressors screws after these adjustments. Re-checking set screws should be de-activated while the test is being run. after 10-12 hrs. run time is recommended. Johnson Controls Ducted Systems... -
Page 42: Dry Coil Delta P
2650 2450 2250 2050 JA4, JA5 1850 1650 1450 1250 1050 0.02 0.04 0.06 0.08 0.12 Dry Coil Delta P (IWG) Figure 28: Dry Coil Delta P Johnson Controls Ducted Systems... -
Page 43: Motor Sheave Datum Diameters
CFM. Adjustments of the blower speed and belt tension are REQUIRED. Verify proper sheave alignment; tighten blower pulley and motor sheave set screws after these adjustments. Re-checking set screws after 10-12 hrs. run time is recommended. Johnson Controls Ducted Systems... -
Page 44: Operation
Cooling SAT Lower Setpoint. Anti- Short Cycle Delay (5 min default) must have • If the output to the economizer actuator is at minimum elapsed. position and the supply air temperature drops more than 5 Johnson Controls Ducted Systems... -
Page 45: Cooling Operation Errors
45ºF (default). When the OAT Sensor senses a temperature below the low ambient setpoint and the NOTE: The following components are needed to access the control points in the Smart Equipment™ control. Johnson Controls Ducted Systems... -
Page 46: Electric Heating Sequence Of Operations
The UCB incorporates features to minimize compressor wear and damage. An Anti-Short Cycle Johnson Controls Ducted Systems... -
Page 47: Gas Heating Sequence Of Operations
If the unit fails after three ignition attempts, the furnace is locked-out for one hour. The furnace is monitored during this Table 25: Electric Heat Anticipator Setpoints one-hour period for unsafe conditions. SETTING, AMPS 0.13 Johnson Controls Ducted Systems... -
Page 48: Gas Heating Operation Errors
UCB will de-energize the indoor blower following the elapse replacement. The ICB remains in this condition until replaced. of the fan off delay for heating. Johnson Controls Ducted Systems... -
Page 49: Start-Up (Cooling)
Set the room thermostat setting lower than the room temperature. Check for correct manifold gas pressures. (See CHECKING First stage compressors will energize after the built-in time GAS INPUT.) delay (five minutes). Johnson Controls Ducted Systems... -
Page 50: Checking Gas Heat Input
“HI” marking on the valve and the first stage the dial, calculate the cubic feet of gas consumed per hour (60% input) adjustment screw is located adjacent to the “LO” (See example below). marking on the valve (See Figure 30). Manifold pressure adjustment procedure. Johnson Controls Ducted Systems... -
Page 51: Typical Flame
The temperature rise (the difference of temperature between the (BLUE ONLY) BURNER BRACKET return air and the heated air from the furnace) must lie within the IGNITOR range shown on the CSA rating plate and the data in Table 10. Figure 29: Typical Flame Johnson Controls Ducted Systems... -
Page 52: Control Board Navigation Components
NOTE: For more in-depth sequence of operation of the Smart TERMINAL – HI (2ND STAGE) Equipment™ control, refer to the Smart Equipment™ Figure 30: Typical Two Stage Gas Valve Controls Sequence of Operation Overview LIT- 12011950. THERMOSTAT WIRED HERE SD-24 Figure 31: Unit Control Board Johnson Controls Ducted Systems... -
Page 53: Smart Equipment™ Ucb Details
SD-24 and R 24 VAC common for thermostat power LEDs on left edge of UCB POWER Green UCB power indicator Lit indicates 24 VAC is present at C and 24V terminals Johnson Controls Ducted Systems... - Page 54 Input required for variable air volume units. Used in VAV indoor DCT PRS+ w.c. sensor blower operation. Optional input; switch closure for greater than 15 seconds DFS (upper pin) 24 VAC hot return from Dirty Filter Switch during indoor blower operation initiates a notification alarm Johnson Controls Ducted Systems...
- Page 55 Not effective for one stage compressor UCBs. If demand is present and permissions allow compressor 2 operation; output 24 VAC hot output for compressor 2 with compressor cooling, comfort ventilation cooling or heat pump heating demands Johnson Controls Ducted Systems...
- Page 56 1.5 to 3.5 volts reading to C; at least 0.25 volts lower – Communication for SA BUS devices than +) SA BUS communication circuit to optional economizer board, 4-stage board, fault detection & diagnostics board, netstat and/or Multi Touch gateway Johnson Controls Ducted Systems...
- Page 57 Green communication board Isolated Power Lit indicates the UCB is supplying power to the communication ISO PWR indicator sub-board 1. When wiring unit and other devices using the SA Bus and FC Bus, see Table 30. Johnson Controls Ducted Systems...
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Page 58: Cable For Fc Buses And Sa Buses In Order Of Preference . 58 31 Ignition Control Flash Codes
Energized With W1 Off Second Stage Gas Valve Gas Valve Energized With First Stage Gas Valve Off Ignition Lockout Gas Flow Gas Pressure Gas Valve Flame Sensor No Power Or Control Steady Off 24VAC or Control Failure Johnson Controls Ducted Systems... -
Page 59: Charging The Unit
Liquid Liquid Delta T Compressor Indoor Db/Wb Pressure Temp. Pressure Temp. Amps 300 Cfm/Ton 80/62 300 Cfm/Ton 80/67 300 Cfm/Ton 80/72 300 Cfm/Ton 75/62 400 Cfm/Ton 80/62 400 Cfm/Ton 80/67 400 Cfm/Ton 80/72 400 Cfm/Ton 75/62 Johnson Controls Ducted Systems... -
Page 60: Ja4Zt Charging Table
10.7 300 Cfm/Ton 11.7 80/72 12.8 10.4 300 Cfm/Ton 11.3 75/62 12.2 10.5 400 Cfm/Ton 11.4 80/62 12.3 10.7 400 Cfm/Ton 11.7 80/67 12.6 10.9 400 Cfm/Ton 11.9 80/72 12.9 10.5 400 Cfm/Ton 11.4 75/62 12.4 Johnson Controls Ducted Systems... -
Page 61: Start-Up Sheet
5370597-JIM-D-1019 Start-Up Sheet Johnson Controls Ducted Systems... - Page 62 5370597-JIM-D-1019 Johnson Controls Ducted Systems...
- Page 63 5370597-JIM-D-1019 Johnson Controls Ducted Systems...
- Page 64 5370597-JIM-D-1019 Johnson Controls Ducted Systems...
- Page 65 5370597-JIM-D-1019 Johnson Controls Ducted Systems...
- Page 66 Subject to change without notice. Printed in U.S.A. 5370597-JIM-D-1019 Copyright © 2019 by Johnson Controls, Inc. All rights reserved. Supersedes: 5370597-JIM-C-0518 York International Corporation 5005 York Drive Norman, OK 73069...
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