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R-410A
ZZ SERIES W/SMART EQUIPMENT™
15 Ton
60 Hertz (Export Only)
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preceding installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rigging and handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Side panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power and control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Optional electric heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Optional gas heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Options and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Economizer sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Dry bulb changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Single enthalpy changeover . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Dual enthalpy changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1 Component location table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 ZZ15 unit limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Weights and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 ZZ15 unit accessory weights . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 ZZ15 unit physical dimensions . . . . . . . . . . . . . . . . . . . . . . . 10
6 Gas inlet and drain components . . . . . . . . . . . . . . . . . . . . . . 11
7 ZZ15 unit clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Side duct dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Left/end duct dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10 Roof curb components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11 Control wire sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
12 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
13 ZZ15 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
14 Electric heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . 25
15 Gas pipe sizing - capacity of pipe . . . . . . . . . . . . . . . . . . . . . 25
16 Gas heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . . . 26
17 Supply air limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
1 Unit shipping bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Condenser covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Compressor section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Component location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Unit 4 point load weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Unit 6 point load weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 ZZ15 physical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9 ZZ15 unit bottom duct openings . . . . . . . . . . . . . . . . . . . . . . 12
10 ZZ15 unit electrical entry . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
11 ZZ15 unit side duct openings . . . . . . . . . . . . . . . . . . . . . . . . 13
12 ZZ15 unit left/end duct opening . . . . . . . . . . . . . . . . . . . . . . 14
13 ZZ15 roof curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
14 ZZ15 transition roof curb . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15 Side panels with hole plugs . . . . . . . . . . . . . . . . . . . . . . . . . 16
16 Return down flow plenum with panel . . . . . . . . . . . . . . . . . . 16
17 Discharge panel in place . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table of contents
Auto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Free cooling operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Power exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Smart Equipment™ economizer board . . . . . . . . . . . . . . . . . . 30
Airflow performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Air balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Checking air quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Cooling sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . 41
Cooling operation errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Electric heating sequence of operations . . . . . . . . . . . . . . . . . 43
Electric heat operation errors . . . . . . . . . . . . . . . . . . . . . . . . 43
Gas heating sequence of operations. . . . . . . . . . . . . . . . . . . . 44
Gas heating operation errors . . . . . . . . . . . . . . . . . . . . . . . . 44
Cooling start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Gas heat start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Checking gas heat input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Charging the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Smart Equipment™ unit control board . . . . . . . . . . . . . . . . . . . . . 50
Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
List of tables
18 Altitude/temperature correction factors . . . . . . . . . . . . . . . . . 35
19 Airflow performance - side duct application . . . . . . . . . . . . . 37
20 Airflow performance - bottom duct application . . . . . . . . . . . 37
21 RPM selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
22 Indoor blower specifications . . . . . . . . . . . . . . . . . . . . . . . . . 38
23 Power exhaust specifications . . . . . . . . . . . . . . . . . . . . . . . . 38
24 Motor sheave datum diameters . . . . . . . . . . . . . . . . . . . . . . 40
25 Additional static resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 41
26 Electric heat limit setting 50 in. cabinet . . . . . . . . . . . . . . . . . 44
27 Electric heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . 44
28 Gas heat limit control settings . . . . . . . . . . . . . . . . . . . . . . . . 45
29 Gas heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . . . 46
30 Gas rate cubic feet per hour . . . . . . . . . . . . . . . . . . . . . . . . . 47
31 Gas heat stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
33 Ignition control flash codes . . . . . . . . . . . . . . . . . . . . . . . . . . 56
List of figures
18 Side panels for economizer hood tops . . . . . . . . . . . . . . . . . 16
19 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
heat and all units with a VFD option . . . . . . . . . . . . . . . . . . . 18
VFD option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
22 Typical electronic thermostat field wiring . . . . . . . . . . . . . . . 20
23 Side entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
24 Bottom entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
25 SE-ECO1001-0 economizer controller . . . . . . . . . . . . . . . . . 30
26 Belt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
27 Altitude/temperature correction factors . . . . . . . . . . . . . . . . 35
28 Dry coil delta P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
29 Typical flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
30 Typical gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
31 Unit control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5835254-YIM-A-1119
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Table of Contents
Related Manuals for York ZZ Seies
Summary of Contents for York ZZ Seies
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Page 1: Table Of Contents
R-410A ZZ SERIES W/SMART EQUIPMENT™ 15 Ton 60 Hertz (Export Only) Table of contents General ..........2 Auto . -
Page 2: General
5835254-YIM-A-1119 General ® York ZZ15 unit is single package air conditioners with optional gas heating designed for outdoor installation on a rooftop or Before you perform service or maintenance operations slab and for non-residential use. The units can be equipped on the unit, turn off the main power switch to unit. - Page 3 • Electric Heater Accessory 50 in. cabinet • Electric Heater Accessory 42 in. cabinet Renewal parts ® Contact your local York parts distribution center for authorized This product must be installed in strict compliance with replacement parts. the enclosed installation instructions and any applicable local, state and national codes including, but not limited to, building, electrical, and mechanical codes.
- Page 4 5835254-YIM-A-1119 Nomenclature Nomenclature for ZZ 15 Ton Z Z 15 C 00 B 2 A Product Generation Product Category 1 = First Generation ZZ = Pkg AC Constant Volume (Export Only) Special Options - Country Nominal Cooling Capacity L = Latin America 15 = 15 Ton Cabinet Options Heat Type...
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Page 5: Installation
5835254-YIM-A-1119 Installation Remove the toolless doorknobs and instruction packet, see Figure 3. Installation safety information Read the following instructions before you install this appliance. This is an outdoor combination heating and cooling unit. The installer must assure that these instructions are made available to the consumer. -
Page 6: Limitations
5835254-YIM-A-1119 Limitations If components are added to a unit to meet local codes, they are installed at the dealer’s and/or customer’s expense. These units must be installed in accordance with the following: The size of the unit for the proposed installation must be based In the U.S.A.: on a heat loss/heat gain calculation made according to the National Electrical Code, ANSI/NFPA No. -
Page 7: Unit Components
Power ventor motor Second model nameplate inside hinged access panel 1. Roof curbs in eight and fourteen inch heights. Roof curbs for transitioning from York® Sunline™ footprint to the ZZ series foot prints are also available as a field installed accessory. -
Page 8: Location
• Masonry acid washing materials Location ® If a unit is installed on a roof curb other than a York roof curb, you must apply gasketing to all surfaces that come Use the following guidelines to select a suitable location for in contact with the unit underside. -
Page 9: Weights And Dimensions
5835254-YIM-A-1119 FRONT FRONT LEFT LEFT Figure 5: Unit 4 point load weight Figure 6: Unit 6 point load weight FRONT LEFT Figure 7: Center of gravity Table 3: Weights and dimensions Size Weight (lbs.) Center of gravity 4 point load location (lbs.) 6 point load location (lbs.) Model (tons) -
Page 10: Zz15 Unit Accessory Weights
5835254-YIM-A-1119 Table 4: ZZ15 unit accessory weights Weight (lbs.) Unit accessory Shipping Operating Economizer Power exhaust Electric heat Gas heat 1. Weight given is for the maximum heater size available (54KW). 2. Weight given is for the maximum number of tube heat exchangers available (8 tube). 28.86 29.66 44.09... -
Page 11: Gas Inlet And Drain Components
5835254-YIM-A-1119 Detail A 3.184 3.184 Ø 2.000 Ø 2.000 Ø 3.126 Ø 3.126 17.541 14.594 7.715 7.705 4.737 4.727 42 inch cabinet 50 3/4 inch cabinet Detail B 5-3/8 Gas inlet and drain components Item Description Gas pipe inlet Gas exhaust vent 1 in. -
Page 12: Zz15 Unit Bottom Duct Openings
5835254-YIM-A-1119 32 11/16 6 13/16 6 13/16 RETURN SUPPLY 27 1/2 LEFT RIGHT 20 1/8 19 1/8 17 1/8 12 5/16 Bottom condensate drain 14 1/2 25 9/16 Bottom gas supply entry 16 3/8 18 1/16 FRONT Top view 3X Ø 0.875 Ø... -
Page 13: Side Duct Dimensions
5835254-YIM-A-1119 Figure 9 shows the bottom power, control, and convenience outlet wiring entry. Item Description Disconnect switch cover Power entry Ø 2-1/2 Control entry Ø 7/8 Power entry Ø 2-1/2 Convenience outlet cover Convenience outlet power entry Ø 7/8 Figure 10: ZZ15 unit electrical entry Dot Plugs 18-1/4 5-5/32... -
Page 14: Left/End Duct Dimensions
5835254-YIM-A-1119 4-5/16 Figure 12: ZZ15 unit left/end duct opening Table 8: Left/end duct dimensions Dimension (in.) Unit model number ZZ15 30.358 22.580 22.330 80-5/8 50-1/2 8 or 14 Figure 13: ZZ15 roof curb Johnson Controls Ducted Systems... -
Page 15: Ductwork
5835254-YIM-A-1119 23 4 30-1/2 50-1/2 80-5/8 76-5/8 59-1/4 64-1/4 Figure 14: ZZ15 transition roof curb Roof curb components Item Description Return air Supply air Right side of the unit Front side of the unit 2 typ. Insulated deck under the condenser section Insulated deck under the compressor section For a side duct application, complete the following steps. -
Page 16: Side Panels
5835254-YIM-A-1119 Figure 15: Side panels with hole plugs Note: Note the orientation of the panel with the insulation side facing up. Figure 18: Side panels for economizer hood tops Condensate drain The side condensate drain is reversible and maybe re-oriented to the rear of the cabinet to facilitate condensate piping. -
Page 17: Filters
5835254-YIM-A-1119 coils or safety shutdown. See the physical data tables for the number and size of filters needed for the unit. Do not operate the unit without filters properly installed. This system uses R-410A refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. -
Page 18: Field Wiring Disconnect - Cooling Unit With Or Without Electric Heat And All Units With A Vfd Option
5835254-YIM-A-1119 See Figures 20, 21, and 22 for typical field wiring. Refer to the Power wiring detail appropriate unit wiring diagram mounted inside the control Units are factory wired for the voltage shown on the unit doors for control circuit and power wiring information. nameplate. -
Page 19: Field Wiring Disconnect - Cooling Unit With Gas Heat Without A Vfd Option
5835254-YIM-A-1119 CONTACTOR 1M FACTORY OR FIELD GROUND SUPPLIED DISCONNECT THREE PHASE POWER SUPPLY Figure 21: Field wiring disconnect - cooling unit with gas heat without a VFD option Johnson Controls Ducted Systems... -
Page 20: Control Wire Sizes
5835254-YIM-A-1119 Thermostat wiring insulated wires to connect the thermostat to the unit. See Table 9 for control wire sizing and maximum length. Note: This section is not applicable to units with a VFD. Table 9: Control wire sizes Install the thermostat on an inside wall approximately 56 inches above the floor. -
Page 21: Electrical Data
5835254-YIM-A-1119 Table 10: Electrical data ZZ15 Standard Motor - Without Powered Convenience Outlet OD Fan Supply Max Fuse Compressors Max Fuse Motors Blower Conv Electric Heat Option Breaker (each) Size w/Pwr Breaker (each) Motor Motor Outlet Volt Size w/ (Tons) (Amps) Size Pwr Exh... - Page 22 5835254-YIM-A-1119 ZZ15 Standard Motor - With Powered Convenience Outlet OD Fan Supply Max Fuse Compressors Max Fuse Motors Blower Conv Electric Heat Option Breaker (each) Size w/Pwr Breaker (each) Motor Motor Outlet Volt Size w/ Pwr (Tons) (Amps) Size (Amps) (Amps) RLA LRA Model...
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Page 23: Zz15 Physical Data
5835254-YIM-A-1119 Table 11: ZZ15 Physical Data Models Component ZZ15 Nominal Tonnage 187072 Gross Capacity @ AHRI A Point (BTU) AHRI net Capacity (Btu) 179614 11.5 4500 Nominal CFM AHRI COOLING 16.34 System Power (KW) PERFORMANCE Refrigerant type R-410A Refrigerant charge (lb-oz) 8-12 System 1 System 2... - Page 24 5835254-YIM-A-1119 Table 11: ZZ15 Physical Data (continued) Models Component ZZ15 Nominal Tonnage Quantity of fans fan diameter (Inch) Type Prop Direct Drive type CONDENSER FAN Quantity of motors DATA Motor HP each No. speeds Nominal total CFM 14000 Quantity Fan size (inch) 15 x 15 Type Centrifugal...
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Page 25: Optional Electric Heat
5835254-YIM-A-1119 Optional electric heat within the central compartment of the unit with the heater elements extending in to the supply air chamber. The factory-installed heaters are wired for single point power Fuses are supplied, where required, by the factory. Some kW supply. -
Page 26: Gas Heat Minimum Supply Air
5835254-YIM-A-1119 NOTE: Maximum capacity of pipe in cubic feet of gas per hour NOTE: There may be a local gas utility requirement specifying a based upon a pressure drop of 0.3 inch W.C. and 0.6 minimum diameter for gas piping. All units require a 3/4 specific gravity gas. -
Page 27: Options And Accessories
5835254-YIM-A-1119 For satisfactory operation, LP gas pressure must be 10.5 inch electric heaters are fused and intended for use with single point W.C. at the unit under full load. Maintaining proper gas power supply. pressure depends on three main factors: Smoke detectors •... -
Page 28: Economizer Sequences
5835254-YIM-A-1119 Motorized outdoor damper of 6-10 times the duct diameter. Tubing must also be run between the LOW pressure tap of the transducer and The motorized outdoor damper can be a factory-installed option atmospheric pressure (outside of the unit). or a field-installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the assembly. -
Page 29: Dual Enthalpy Changeover
5835254-YIM-A-1119 Dual enthalpy changeover Once a compressor output is turned ON, the economizer dampers continue to modulate to control the supply air For dual enthalpy economizer operation, the outside air temperature to the Economizer setpoint. enthalpy must be lower than the return air enthalpy by 1 btu/lb At no time will a compressor output be turned ON if the AND the outside air temperature is no greater than the RAT economizer output is less than 100%, even if the differential... -
Page 30: Smart Equipment™ Economizer Board
5835254-YIM-A-1119 Smart Equipment™ economizer board Figure 25: SE-ECO1001-0 economizer controller The following tables describe the details of the economizer board. See Figure 25 for connection locations. Smart Equipment™ economizer board - analog inputs Board Cover Location Description Function and comments label label 24 VAC common/0-10 VDC negative for... - Page 31 5835254-YIM-A-1119 Smart Equipment™ economizer board - analog inputs (continued) Board Cover Location Description Function and comments label label 24 VAC common/0-10 VDC negative for the Connects through circuit trace to 24V~ IN pin COM supply air humidity sensor 24 VAC hot supplied for the indoor air quality 24V~ Connects through circuit trace to 24V~ IN pin HOT sensor...
- Page 32 5835254-YIM-A-1119 Smart Equipment™ economizer board - SA bus details Board Cover Location Description Function and comments label label EconCtrlr parameter reports UCB-to-economizer board SA bus communication status. Negative of the SA BUS communication Common for SA BUS power and circuit to the UCB. Through the unit wiring harness, may continue on communication circuits to the 4-stage board and/or fault detection &...
- Page 33 5835254-YIM-A-1119 Smart Equipment™ economizer board - binary outputs Board Cover Location Description Function and comments label label 24 VAC hot supplied for an incremental 24V~ Connects through circuit trace to 24V~ IN pin HOT (floating control) economizer actuator 24 VAC hot outputs to position an incremental ACT-A Unused in current control revision (floating control) economizer actuator...
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Page 34: Supply Air Limitations
5835254-YIM-A-1119 • Optional CO sensor kit - part no. 2AQ04700624 Phasing ZZ15 units are properly phased at the factory. Check for proper compressor rotation. If the blower or compressors rotate in the wrong direction at start-up, the electrical connection to the unit is misphased. -
Page 35: Altitude/Temperature Correction Factors
5835254-YIM-A-1119 Table 16: Altitude/temperature correction factors Altitude (ft.) Air temp. 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 1.060 1.022 0.986 0.950 0.916 0.882 0.849 0.818 0.788 0.758 0.729 1.039 1.002 0.966 0.931 0.898 0.864 0.832 0.802 0.772 0.743 0.715 1.019... - Page 36 5835254-YIM-A-1119 Drive selection Determine side or bottom supply duct application. Determine the required airflow. Calculate or measure the amount of external static pressure. With the operating point determined from steps 1, 2, and 3, locate this point on the appropriate supply air blower performance table.
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Page 37: Airflow Performance
5835254-YIM-A-1119 Airflow performance Table 17: Airflow performance - side duct application ZZ15 (15 Ton) Side Duct Available External Static Pressure - IWG Air Flow (CFM) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 3200 0.88 1.09... -
Page 38: Air Balance
5835254-YIM-A-1119 Table 19: RPM selection Size Motor Blower 6 turns 5 turns 4 turns 3 turns 2 turns 1 turn Fully Model Max BHP (tons) sheave sheave open open open open open open closed 3.45 1VM50 AK74 1035 1084 1134 (15) 5.75 1VP56... -
Page 39: Dry Coil Delta P
5835254-YIM-A-1119 Method two Determine the unit measured CFM from the blower performance table, external static pressure, and the Drill two 5/16 inch holes, one in the return air duct as close number of turns the variable motor sheave is open. to the inlet of the unit as possible, and another in the supply To adjust measured CFM to required CFM, see Supply air air duct as close to the outlet of the unit as possible. -
Page 40: Motor Sheave Datum Diameters
5835254-YIM-A-1119 Supply air drive adjustment New BHP = (Speed increase) • BHP at 3,800 CFM = (Speed increase) • Original BHP = New BHP Before you make any blower speed changes, review the installation for any installation errors, leaks, or New motor Amps undesirable systems effects that can result in loss of airflow. -
Page 41: Operation
5835254-YIM-A-1119 Table 23: Additional static resistance Electric heat kW Size Model Cooling only Economizer 4 in. filter (tons) 3700 0.20 0.49 0.27 0.17 0.18 0.21 0.22 0.26 3900 0.23 0.54 0.29 0.19 0.20 0.23 0.24 0.28 4100 0.25 0.58 0.32 0.21 0.22 0.25... -
Page 42: Cooling Operation Errors
5835254-YIM-A-1119 times, the compressors and condenser fans are de-energized. Motorized outdoor air dampers Otherwise, the unit operates each cooling system until the This system operation is the same as the units with no outdoor minimum run times for the compressors have been completed. air options with one exception. -
Page 43: Electric Heating Sequence Of Operations
5835254-YIM-A-1119 Evaporator low limit Compressor protection During cooling operation, if the Evaporator Low Limit Sensor In addition to the external pressure switches, the compressors (EC1, 2) (Located on the Suction Line at the Evaporator Coil.) also have inherent (internal) protection. If there is an abnormal detects a temperature below 26°F (default), the UCB de- temperature rise in a compressor, the protector opens to shut energizes the associated compressor, initiates the ASCD, and,... -
Page 44: Gas Heating Sequence Of Operations
5835254-YIM-A-1119 Limit switch GV, the UCB initiates the fan on delay for heating, energizing the indoor blower the specified delay has elapsed. The limit switch (LS) is located inside the heater compartment and is set to open at the temperature indicated in Table 24, When the thermostat is satisfied, heating calls are ceased. -
Page 45: Gas Heat Limit Control Settings
5835254-YIM-A-1119 will cause the appropriate action to occur. Recycling the low Safety controls voltage power cancels the lockout. The UCB monitors the temperature limit switch of gas heat units. Temperature limit The control circuit includes the following safety controls: If the UCB senses zero volts from the high temperature limit, the indoor blower motor is immediately energized. -
Page 46: Cooling Start-Up
5835254-YIM-A-1119 Flash codes Set the room thermostat setting lower than the room temperature. The ICB initiates a flash code associated with errors within the First stage compressors energize after the built-in time system, Table 31 on page 56. delay of five minutes. Resets The second stage of the thermostat energizes the second stage compressor if needed. -
Page 47: Checking Gas Heat Input
5835254-YIM-A-1119 Note: Do not over-fire the furnace on second stage. If in doubt, it is better to leave the second stage of the furnace slightly under-fired. Fire or explosion hazard Repeat Steps 1-5. Failure to follow the safety warning exactly could result Determining the rate of gas flow (first stage) in serious injury, death or property damage. -
Page 48: Gas Heat Stages
5835254-YIM-A-1119 Table 28: Gas rate cubic feet per hour Note: Do not under-fire the unit on first stage. Size of test dial Seconds for one After you check the pressure, replace the plastic cap rev. 1/2 cu. ft. 1 cu. ft. covering the HI and LO pressure adjustment screws. -
Page 49: Charging The Unit
5835254-YIM-A-1119 Charging the unit To service the burners, remove the heat shield on top of the manifold supports. Inspect the burners and replace them if required. All ZZ units use thermal expansion devices. Charge the unit to nameplate charge. Reverse the above procedure to replace the assemblies. Verify that burners are level and seated at the rear of the Navigation components for the Smart gas orifice. -
Page 50: Smart Equipment™ Unit Control Board
5835254-YIM-A-1119 Smart Equipment™ unit control board SD-24 Figure 31: Unit control board The following tables describe the details of the UCB, see Figure 31 for the connection locations. Smart Equipment™ UCB - thermostat connection strip Location Label Description Function and comments 1st stage heating request, 24 VAC input switched from R Not effective for cooling-only units Not effective for cooling-only units or units with single-stage heat... - Page 51 5835254-YIM-A-1119 Smart Equipment™ UCB - limit, 24 VAC power, and shutdown connections Location Label Description Function and comments Monitored 24 VAC input through heat section If voltage is absent, indicating the heat section is over-temperature, the UCB will LIMIT limit switch(es) bring on the indoor blower 24 VAC, 75 VA transformer Common Connects through circuit traces to thermostat connection strip C and indoor...
- Page 52 5835254-YIM-A-1119 Smart Equipment™ UCB - temperature sensor connections (continued) Location Label Description Function and comments Input required for 2-compressor heat pump units, not required for 2- #2 refrigerant circuit Condenser Coil temperature compressor A/C units, not active for 1-compressor units; 3.625 VDC CC2+ sensor input from 10KΩ...
- Page 53 5835254-YIM-A-1119 Smart Equipment™ UCB - heat section connections Location Label Description Function and comments Not effective for cooling-only units. Output if demand is present and 24 VAC hot output for heat section stage 1 permissions allow one stage or two stages of heat section operation Not effective for cooling-only units or units with single-stage heat sections.
- Page 54 5835254-YIM-A-1119 Smart Equipment™ UCB - refrigerant circuit safety switch and indoor blower overload connections (continued) Location Label Description Function and comments LPS2 24 VAC hot out for refrigerant circuit 2 Low Not effective for one stage compressor UCBs. Connects through (right pin) Pressure Switch circuit trace to the left HSP2 pin...
- Page 55 5835254-YIM-A-1119 Smart Equipment™ UCB - LEDs Location Label Description Function and comments POWER Green UCB power indicator Lit indicates 24 VAC is present at C and 24V terminals 1/2 second on/off flashing indicates one or more alarm is currently active, Red hard lockout, networking error and firmware 1/10th second on/off flashing indicates a networking error (polarity, FAULT...
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Page 56: Cable For Fc Buses And Sa Buses In Order Of Preference
5835254-YIM-A-1119 Table 30: Cable for FC buses and SA buses in order of preference Non-plenum applications Plenum applications Bus and cable type Part number O.D. Part number O.D. Anixter: Anixter: CBL-22/3-FC-PLN CBL-22/3-FC-PVC 0.138 in. 0.140 in. FC Bus: 22 AWG Stranded, 3-Wire Twisted Shielded Cable Belden: B6501FE Belden®: B5501FE Anixter:... -
Page 57: Start-Up Sheet
5835254-YIM-A-1119 Start-up sheet Johnson Controls Ducted Systems... - Page 58 5835254-YIM-A-1119 Johnson Controls Ducted Systems...
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- Page 62 Subject to change without notice. Printed in U.S.A. 5835254-YIM-A-1119 Copyright © 2019 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing York International Corporation 5005 York Drive Norman, OK 73069...