1. Manuals
  2. Brands
  3. York Manuals
  4. Air Conditioner
  5. ZKT06
  6. Installation manual

York ZKT06 Installation Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
R-410A
ZK SERIES W/SMART EQUIPMENT™
6-1/2 - 12-1/2 Ton
60 Hertz
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preceding installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rigging and handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Side panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power and control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Optional electric heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Optional gas heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Options and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Economizer sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Dry bulb changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Single enthalpy changeover . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Dual enthalpy changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Auto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
1 Component location table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 ZKT06 through T12 unit limitations . . . . . . . . . . . . . . . . . . . . . 8
3 Weights and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 ZKT06 through T12 unit accessory weights . . . . . . . . . . . . . 10
6 ZKT06 through T12 unit clearances . . . . . . . . . . . . . . . . . . . 11
7 Side duct dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Left/end duct dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Roof curb components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10 Control wire sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
12 ZKT06 through T12 physical data . . . . . . . . . . . . . . . . . . . . . 28
13 Electric heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . 30
14 Gas application data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
15 Gas pipe sizing - capacity of pipe . . . . . . . . . . . . . . . . . . . . . 31
16 Gas heat minimum supply air . . . . . . . . . . . . . . . . . . . . . . . . 31
17 Supply air limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
18 Altitude/temperature correction factors . . . . . . . . . . . . . . . . . 39
1 Unit shipping bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Condenser covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Compressor section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 ZK component location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Unit 4 point load weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Unit 6 point load weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 ZKT06 through T10 physical dimensions . . . . . . . . . . . . . . . 10
9 ZKT12 physical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 10
11 ZKT06 through T12 unit electrical entry . . . . . . . . . . . . . . . . 12
13 ZKT12 unit side duct openings . . . . . . . . . . . . . . . . . . . . . . . 13
15 ZKT06 through T12 roof curb . . . . . . . . . . . . . . . . . . . . . . . . 14
16 ZKT06 through T12 transition roof curb . . . . . . . . . . . . . . . . 14
17 Side panels with hole plugs . . . . . . . . . . . . . . . . . . . . . . . . . 15
18 Return downflow plenum with panel . . . . . . . . . . . . . . . . . . . 15

Table of contents

Free cooling operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Power exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Smart Equipment™ economizer board . . . . . . . . . . . . . . . . . . 35
Airflow performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Air balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Checking air quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Cooling sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . 50
Cooling operation errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Reheat mode sequence of operation . . . . . . . . . . . . . . . . . . . 52
Electric heating sequence of operations . . . . . . . . . . . . . . . . . 53
Electric heat operation errors . . . . . . . . . . . . . . . . . . . . . . . . 54
Gas heating sequence of operations. . . . . . . . . . . . . . . . . . . . 54
Gas heating operation errors . . . . . . . . . . . . . . . . . . . . . . . . 55
Cooling start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Gas heat start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Checking gas heat input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Charging the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Smart Equipment™ unit control board . . . . . . . . . . . . . . . . . . . . . 60
Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
List of tables
21 RPM selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
22 Indoor blower specifications . . . . . . . . . . . . . . . . . . . . . . . . . 46
23 Power exhaust specifications . . . . . . . . . . . . . . . . . . . . . . . . 46
24 Motor sheave datum diameters . . . . . . . . . . . . . . . . . . . . . . 48
25 Additional static resistance . . . . . . . . . . . . . . . . . . . . . . . . . . 49
27 Electric heat limit setting 50 in. cabinet . . . . . . . . . . . . . . . . . 54
28 Electric heat limit setting 42 in. cabinet . . . . . . . . . . . . . . . . . 54
29 Electric heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . 54
30 Gas heat limit control settings . . . . . . . . . . . . . . . . . . . . . . . . 56
31 Gas heat anticipator setpoints . . . . . . . . . . . . . . . . . . . . . . . 56
32 Gas rate cubic feet per hour . . . . . . . . . . . . . . . . . . . . . . . . . 58
33 Gas heat stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
35 Ignition control flash codes . . . . . . . . . . . . . . . . . . . . . . . . . . 66
List of figures
19 Discharge panel in place . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
21 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
electric heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
24 Typical low voltage field wiring . . . . . . . . . . . . . . . . . . . . . . . 19
25 Side entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
26 Bottom entry gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
27 SE-ECO1001-0 economizer controller . . . . . . . . . . . . . . . . . 35
28 Belt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
29 Altitude/temperature correction factors . . . . . . . . . . . . . . . . 40
30 Dry coil delta P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
33 Typical flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
34 Typical gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
35 Unit control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Advertisement

Table of Contents
loading

Related Manuals for York ZKT06

Summary of Contents for York ZKT06

  • Page 1: Table Of Contents

    31 Cooling operation piping schematic - circuit #1 shown ..52 15 ZKT06 through T12 roof curb ......14 32 Reheat operation piping schematic - circuit #1 shown .

  • Page 2: General

    5121835-TIM-J-1118 General TempMaster ZK units are single package air conditioners with optional gas heating designed for outdoor installation on a Before you perform service or maintenance operations rooftop or slab and for non-residential use. The units can be on the unit, turn off the main power switch to unit. equipped with factory or field-installed electric heaters for Electrical shock could cause personal injury.
  • Page 3 Additional information is available in the following reference forms: Improper installation may create a condition where the • Technical Guide - ZU/ZW/ZKT06 through T12, 5123247 operation of the product could cause personal injury or property damage. • General Installation - ZKT06 through T12, 5121835 •...
  • Page 4 5121835-TIM-J-1118 Nomenclature 3-12.5 Ton Model Number Nomenclature Z K T10 N 18 A 2 A A C 2 1 B A 7 Product Category Product Generation 7 = Seventh Generation Z = A/C, Single Pkg., R-410A Coated Coils Product Identifier A = Un-Coated K = Reheat B = E-Coat Cond &...

  • Page 5: Installation

    5121835-TIM-J-1118 Remove the toolless doorknobs and instruction packet, see Installation 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

    5121835-TIM-J-1118 If components are added to a unit to meet local codes, they are Limitations 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

    5121835-TIM-J-1118 Unit components Figure 4: ZK component location Figure 4 shows the ZKT10 model. Table 1 lists the components of the unit. Table 1: Component location table Item Description Item Description Two-stage gas heating to maintain warm, comfortable Terminal block for high-voltage connection temperature Smart Equipment™...

  • Page 8: Location

    5121835-TIM-J-1118 Table 2: ZKT06 through T12 unit limitations Unit limitations Size Model Unit voltage Applied voltage Outdoor DB temp (tons) Minimum Maximum Maximum (°F) 208/230-3-60 460-3-60 (6.5) 575-3-60 208/230-3-60 460-3-60 (7.5) 575-3-60 208/230-3-60 460-3-60 (8.5) 575-3-60 208/230-3-60 460-3-60 (10) 575-3-60...

  • Page 9: Weights And Dimensions

    5121835-TIM-J-1118 If a unit is installed on a roof curb other than a TempMaster roof curb, you must apply gasketing to all surfaces that come in contact with the unit underside. Before lifting the unit, make sure that the unit weight is distributed equally on the rigging cables so that it lifts FRONT LEFT...

  • Page 10: Zkt06 Through T12 Unit Accessory Weights

    5121835-TIM-J-1118 Table 4: ZKT06 through T12 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).

  • Page 11: Zkt06 Through T12 Unit Physical Dimensions

    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 Figure 10: ZKT06 through T12 unit bottom duct openings Johnson Controls Ducted Systems...

  • Page 12: Zkt06 Through T12 Unit Electrical Entry

    D o t P l u g s Return Supply Air 2 - 3 1 /3 2 5 - 5 /3 2 3 1 - 1 1 /1 6 Figure 12: ZKT06 through T10 unit side duct openings Johnson Controls Ducted Systems...

  • Page 13: Side Duct Dimensions

    18 1/16 28 1/4 18 1/4 ZKT12 28 1/4 18 1/16 28 1/4 18 1/4 4-5/16 Figure 14: ZKT06 through T12 unit/end left duct opening Table 8: Left/end duct dimensions Dimension (in.) Unit model number ZKT06 30.357 13.365 22.516 ZKT07 30.357...

  • Page 14: Roof Curb Components

    Figure 15: ZKT06 through T12 roof curb 23 4 30-1/2 50-1/2 80-5/8 76-5/8 59-1/4 64-1/4 Figure 16: ZKT06 through T12 transition roof curb Roof curb components Item Description Return air Supply air Right side of the unit Front side of the unit 2 typ.

  • Page 15: Ductwork

    5121835-TIM-J-1118 Ductwork You must design and size ductwork according to the methods in Manual D of the Air Conditioning Contractors of America (ACCA) or as recommended by any other recognized authority such as ASHRAE or SMACNA. When you design the duct system, apply the following recommendations.

  • Page 16: Condensate Drain

    5121835-TIM-J-1118 This system uses R-410A refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. The compressor also uses a polyolester (POE oil), Mobil 3MA POE. This oil is extremely hygroscopic, meaning it absorbs water readily.

  • Page 17: Power And Control Wiring

    5121835-TIM-J-1118 coils or safety shutdown. See the physical data tables for the A disconnect must be utilized for these units. Factory-installed number and size of filters needed for the unit. disconnects are available. Do not operate the unit without filters properly installed. Avoid damage to internal components if you drill holes to install a disconnect.

  • Page 18: Typical Field Wiring Disconnect - Cooling Unit With Or Without Electric Heat

    5121835-TIM-J-1118 TERMINAL BLOCK TB1 FACTORY OR FIELD GROUND SUPPLIED DISCONNECT THREE PHASE POWER SUPPLY Figure 22: Typical field wiring disconnect - cooling unit with or without electric heat CONTACTOR 1M FACTORY OR FIELD GROUND SUPPLIED DISCONNECT THREE PHASE POWER SUPPLY Figure 23: Typical field wiring disconnect - cooling unit with gas heat Johnson Controls Ducted Systems...

  • Page 19: Control Wire Sizes

    5121835-TIM-J-1118 insulated wires to connect the thermostat to the unit. See Table Thermostat wiring 9 for control wire sizing and maximum length. Install the thermostat on an inside wall approximately 56 inches above the floor. The thermostat must not be subject to drafts, Table 9: Control wire sizes sun exposure, or heat from electrical fixtures or appliances.

  • Page 20: Electrical Data

    5121835-TIM-J-1118 Table 10: Electrical data ZKT06 through T12 standard motor - without powered convenience outlet OD fan Supply Max fuse Compressors Pwr exh Max fuse motors blower conv Electric heat option breaker (each) motor Size breaker (each) motor outlet Volt...
  • Page 21 5121835-TIM-J-1118 ZKT06 through T12 standard motor - without powered convenience outlet (continued) OD fan Supply Max fuse Compressors Pwr exh Max fuse motors blower conv Electric heat option breaker (each) motor Size breaker (each) motor outlet Volt with pwr size with...
  • Page 22 5121835-TIM-J-1118 ZKT06 through T12 high static motor - without powered convenience outlet OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker size with...
  • Page 23 5121835-TIM-J-1118 ZKT06 through T12 high static motor - without powered convenience outlet (continued) OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker...
  • Page 24 5121835-TIM-J-1118 ZKT06 through T12 standard motor - with powered convenience outlet OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker size with...
  • Page 25 5121835-TIM-J-1118 ZKT06 through T12 standard motor - with powered convenience outlet (continued) OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker size with...
  • Page 26 5121835-TIM-J-1118 ZKT06 through T12 high static motor - with powered convenience outlet OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker size with...
  • Page 27 5121835-TIM-J-1118 ZKT06 through T12 high static motor - with powered convenience outlet (continued) OD fan Supply Max fuse Compressors Pwr exh motors blower conv Electric heat option Max fuse breaker (each) motor Size (each) motor outlet Volt with pwr breaker...

  • Page 28: Zkt06 Through T12 Physical Data

    5121835-TIM-J-1118 Table 11: ZKT06 through T12 physical data Models Component ZKT06 ZKT07 ZKT08 ZKT10 ZKT12 Nominal tonnage 12.5 AHRI cooling performance Gross capacity @ AHRI A point (Mbh) 80000 90000 105000 124000 157000 AHRI net capacity (Mbh) 78000 88000 102000...
  • Page 29 5121835-TIM-J-1118 Table 11: ZKT06 through T12 physical data (continued) Models Component ZKT06 ZKT07 ZKT08 ZKT10 ZKT12 Nominal tonnage 12.5 Reheat coil data Face area (sq. ft) 6.66 6.66 Rows Fins per inch Tube diameter (in.) Condenser fan data Quantity of fans...

  • Page 30: Optional Electric Heat

    5121835-TIM-J-1118 These CSA approved heaters are located within the central Optional electric heat compartment of the unit with the heater elements extending in The factory-installed heaters are wired for single point power to the supply air chamber. supply. You only need to bring the power supply into the single Fuses are supplied, where required, by the factory.

  • Page 31: Gas Pipe Sizing - Capacity Of Pipe

    5121835-TIM-J-1118 Table 14: Gas pipe sizing - capacity of pipe Nominal iron pipe size Length of pipe (ft.) 3/4 in. 1 in. 1-1/4 in. 1050 OPTIONAL COIL GUARD SHOWN NOTE: Maximum capacity of pipe in cubic feet of gas per hour based upon a pressure drop of 0.3 inch W.C.

  • Page 32: Options And Accessories

    5121835-TIM-J-1118 • You must install a 1/8-inch NPT plugged tapping, • The pressure drop in the lines between regulators and accessible for test gage connection, immediately between the second stage regulator and the appliance. upstream of the gas supply connection to the unit. The pipe size required depends on the length of the pipe run and the total load of all appliances.

  • Page 33: Economizer Sequences

    5121835-TIM-J-1118 Economizer Dry bulb changeover The economizer can be a factory-installed option or a field- For dry bulb economizer operation, the outside air is suitable for installed accessory. If factory installed, refer to the instructions free cooling if the outside air temperature is 1°F below the included with the economizer to complete the assembly.

  • Page 34: Power Exhaust

    5121835-TIM-J-1118 If the supply air temperature cannot be maintained within 5°F of Power exhaust the economizer setpoint, the first stage compressor (C1) will be turned on. Second stage compressor (C2) will be added as Setpoints needed to keep the supply air temperature within the 5°F of the •...

  • Page 35: Smart Equipment™ Economizer Board

    5121835-TIM-J-1118 Smart Equipment™ economizer board Figure 27: SE-ECO1001-0 economizer controller The following tables describe the details of the economizer board. See Figure 27 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 36 5121835-TIM-J-1118 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 37 5121835-TIM-J-1118 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 38 5121835-TIM-J-1118 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...

  • Page 39: Supply Air Limitations

    5121835-TIM-J-1118 Phasing ZK 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. Change the phasing of the field line connection at the factory or field supplied disconnect to obtain proper rotation.

  • Page 40: Altitude/Temperature Correction Factors

    5121835-TIM-J-1118 Table 17: Altitude/temperature correction factors 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 0.982 0.948 0.913 0.880 0.848 0.816 0.787 0.757 0.729 0.701 1.000 0.964 0.930 0.896...
  • Page 41 5121835-TIM-J-1118 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.

  • Page 42: Airflow Performance

    5121835-TIM-J-1118 Airflow performance Table 18: Airflow performance - side duct application ZKT06 (6.5 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 1.5 HP and field supplied drive...
  • Page 43 5121835-TIM-J-1118 ZKT10 (10 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 2 HP and field supplied drive Standard 2 HP and drive High static 3 HP and drive 2600...

  • Page 44: Airflow Performance - Bottom Duct Application

    5121835-TIM-J-1118 Table 19: Airflow performance - bottom duct application ZKT06 (6.5 ton) bottom 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 1.5 HP and field supplied drive...

  • Page 45: Rpm Selection

    5121835-TIM-J-1118 ZKT10 (10 ton) bottom 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 2 HP and field Standard 2 HP and drive High static 3 HP and drive supplied drive 2600...

  • Page 46: Air Balance

    5121835-TIM-J-1118 Table 21: Indoor blower specifications Motor Motor sheave Blower sheave Size Model Datum dia. Datum dia. Belt (tons) Eff. Frame Bore (in.) Model Bore (in.) Model (in.) (in.) 1-1/2 1725 1.15 3.4 - 4.4 1VM50 AK74 (6.5) 1725 1.15 3.4 - 4.4 1VM50 AK64...

  • Page 47: Dry Coil Delta P

    Determine the unit measured CFM from the blower performance table, external static pressure, and the number of turns the variable motor sheave is open. 0.65 ZKT06 0.55 ZKT07 ZKT08 ZKT10 0.45 ZKT12 0.35...

  • Page 48: Motor Sheave Datum Diameters

    5121835-TIM-J-1118 Supply air drive adjustment You must adjust the belt drive blower systems to the specific static and CFM requirements for the application. Before you make any blower speed changes, review the The belt drive blowers are not set at the factory for any installation for any installation errors, leaks, or specific static or CFM.

  • Page 49: Additional Static Resistance

    5121835-TIM-J-1118 Table 24: Additional static resistance Electric heat kW Size Model Cooling only Economizer 4 in. filter (tons) 1900 0.00 0.07 0.10 0.05 0.06 0.07 0.08 0.10 2100 -0.01 0.09 0.11 0.06 0.07 0.08 0.09 0.11 2300 -0.01 0.11 0.12 0.07 0.08 0.09...

  • Page 50: Operation

    5121835-TIM-J-1118 #1 is energized. If compressor #1 is active for first stage cooling Operation or the first compressor is locked-out, compressor #2 is energized. In free-cooling mode, if the call for the second stage Cooling sequence of operation of cooling continues for 20 minutes, compressor #2 is NOTE: For more in-depth sequence of operation of the Smart energized, provided it has not been locked-out.

  • Page 51: Cooling Operation Errors

    5121835-TIM-J-1118 the associated compressor, initiates the ASCD, and, if the other Economizer with power exhaust compressor is idle, stops the condenser fans. A unit equipped with an economizer (single or dual enthalpy) and a power exhaust operates as specified above with one If the call for cooling is still present at the conclusion of the addition.

  • Page 52: Reheat Mode Sequence Of Operation

    5121835-TIM-J-1118 A low-pressure switch to protect against loss of refrigerant Controller menu. Those modes consist of a Normal, Alternate charge, (opens at 50 ± 5 psig). and, Aux each mode is described below. The above pressure switches are hard-soldered to the unit. The Normal cooling mode refrigeration systems are independently monitored and controlled.

  • Page 53: Electric Heating Sequence Of Operations

    5121835-TIM-J-1118 Evaporator Airflow Coil Condenser Coil Check Valve Check Valve Reheat Coil Airflow Refrigerant Flow Closed Solenoid Valve (SOL 1) Reheat Valve (SOL 3) Compressor Accumulator Open Solenoid Valve (SOL 2) Figure 32: Reheat operation piping schematic - circuit #1 shown Alternate mode Table 25: Dehumidification sequence in normal and When the Unit Control Board (UCB) detects a need for...

  • Page 54: Electric Heat Operation Errors

    °F specified fan on delay for heating, the UCB energizes the blower motor. If the second stage of heat is required, ZKT06, T07 (6.5, 7.5) 208/230 heater relay (RB) is energized. After completing the specified fan on delay for heating, the UCB energizes the blower motor.

  • Page 55: Gas Heating Operation Errors

    5121835-TIM-J-1118 During the flame stabilization period, a loss of the flame for 2 Flame sense seconds causes the GV to close and the retry operation to Flame sensing occurs at all times. If W1 is not present and a begin. After the flame stabilization period, a loss of flame for 3/4 flame is sensed for 2 seconds, the draft motor is energized and second causes the GV to close and the retry operation to begin.

  • Page 56: Cooling Start-Up

    ON cycles and may result in the lowering Unit Main Limit Setting °F of the temperature within the conditioned space. See Table 30 Size Opt. for the required gas heat anticipator setting. ZKT06 Table 30: Gas heat anticipator setpoints ZKT07 Setting, amps ZKT08 0.65 ZKT10 Cooling start-up...

  • Page 57: Gas Heat Start-Up

    5121835-TIM-J-1118 Measure the temperature drop across the evaporator coil. Check the supply gas pressure. It must be within the limits shown on the rating nameplate. Gas heat start-up Note: You must check the supply pressure with all gas appliances in the building at full fire. The standby gas Pre-start checklist pressure must never exceed 10.5 in.

  • Page 58: Gas Rate Cubic Feet Per Hour

    5121835-TIM-J-1118 Multiply 189.6  1 (0.5 if using a 1/2 cubic foot dial) = 189.6. Measure the time needed for one revolution of the hand on the smallest dial on the meter. A typical gas meter has a 1/ Multiply 78  (the BTU rating of the gas). For this example, 2 or a 1 cubic foot test dial.

  • Page 59: Charging The Unit

    5121835-TIM-J-1118 After about 20 minutes of operation, determine the furnace temperature rise. Take readings of both the return air and the heated air in the ducts (about 6 feet from the furnace) where they are not affected by radiant heat. After you determine the temperature rise, calculate the CFM according to the following formula.

  • Page 60: Smart Equipment™ Unit Control Board

    5121835-TIM-J-1118 Smart Equipment™ unit control board SD-24 Figure 35: Unit control board The following tables describe the details of the UCB, see Figure 35 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 61 5121835-TIM-J-1118 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 62 5121835-TIM-J-1118 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 63 5121835-TIM-J-1118 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 64 5121835-TIM-J-1118 Smart Equipment™ UCB - refrigerant circuit safety switch and indoor blower overload connections (continued) Location Label Description Function and comments 24 VAC hot out for refrigerant circuit 2 Low Not effective for one stage compressor UCBs. Connects through LPS2 (right pin) Pressure Switch circuit trace to the left HSP2 pin...
  • Page 65 5121835-TIM-J-1118 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...

  • Page 66: Cable For Fc Buses And Sa Buses In Order Of Preference

    5121835-TIM-J-1118 Table 33: 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 67: Start-Up Sheet

    5121835-TIM-J-1118 Start-up sheet Johnson Controls Ducted Systems...
  • Page 68 5121835-TIM-J-1118 Johnson Controls Ducted Systems...
  • Page 69 5121835-TIM-J-1118 Johnson Controls Ducted Systems...
  • Page 70 5121835-TIM-J-1118 Johnson Controls Ducted Systems...
  • Page 71 5121835-TIM-J-1118 Johnson Controls Ducted Systems...

  • Page 72: 5121835-Tim-J-1118

    Subject to change without notice. Printed in U.S.A. 5121835-TIM-J-1118 Copyright © 2018 by Johnson Controls, Inc. All rights reserved. Supersedes: 5121835-TIM-I-0518 York International Corporation 5005 York Drive Norman, OK 73069...

This manual is also suitable for:

Zk seriesZkt07Zkt08Zkt10Zkt12

Table of Contents