York ZKT06 Installation Manual Download Page 1

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R-410A
ZK SERIES W/SMART EQUIPMENT™

6-1/2 - 12-1/2 Ton

60 Hertz

5121835-TIM-J-1118

Table of contents

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

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

Navigation components for the Smart Equipment™ control board . . . 59

Smart Equipment™ unit control board . . . . . . . . . . . . . . . . . . . . . 60

Start-up sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

List of tables

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

5 ZKT06 through T12 unit physical dimensions . . . . . . . . . . . . 11

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

19 Airflow performance - side duct application . . . . . . . . . . . . . 42

20 Airflow performance - bottom duct application . . . . . . . . . . . 44

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

26 Dehumidification sequence in normal and alternate mode . . 53

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

34 Cable for FC buses and SA buses in order of preference . . 66

35 Ignition control flash codes . . . . . . . . . . . . . . . . . . . . . . . . . . 66

List of figures

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

10 ZKT06 through T12 unit bottom duct openings . . . . . . . . . . 11

11 ZKT06 through T12 unit electrical entry . . . . . . . . . . . . . . . . 12

12 ZKT06 through T10 unit side duct openings. . . . . . . . . . . . . 12

13 ZKT12 unit side duct openings . . . . . . . . . . . . . . . . . . . . . . . 13

14 ZKT06 through T12 unit/end left duct opening . . . . . . . . . . . 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

19 Discharge panel in place . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

20 Save side panels for economizer hood tops . . . . . . . . . . . . 16

21 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

22 Typical field wiring disconnect - cooling unit with or without

electric heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

23 Typical field wiring disconnect - cooling unit with gas 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

31 Cooling operation piping schematic - circuit #1 shown . . . . 52

32 Reheat operation piping schematic - circuit #1 shown . . . . . 53

33 Typical flame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

34 Typical gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

35 Unit control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Summary of Contents for ZKT06

Page 1: ...ide duct application 42 20 Airflow performance bottom duct application 44 21 RPM selection 45 22 Indoor blower specifications 46 23 Power exhaust specifications 46 24 Motor sheave datum diameters 48 2...

Page 2: ...precautions and codes including ANSI Z223 1 or CSA B149 1 latest edition Wear safety glasses and work gloves Use quenching cloth and have a fire extinguisher available during brazing operations Impro...

Page 3: ...nd may be installed directly on combustible flooring or in the U S on wood flooring or Class A Class B or Class C roof covering materials For use with natural gas The unit can be converted to LP with...

Page 4: ...hrowaway Filters 2 2 Pleated Filters Merv 8 3 2 Cleanable Filters 4 4 Pleated Filters Merv 13 A None C BACnet MSTP Modbus N2 COM Card F Fault Detection and Diagnostics FDD E Verasys Single Zone G Vera...

Page 5: ...ure 1 Unit shipping bracket 2 Turn each bracket toward the ground The protective plywood covering drops to the ground 3 Remove the condenser coil protective covering 4 Remove the toolless doorknobs an...

Page 6: ...ate If components are added to a unit to meet local codes they are installed at the dealer s and or customer s expense The size of the unit for the proposed installation must be based on a heat loss h...

Page 7: ...Filter access 2 in or 4 in filter options O Compressor 1 access high efficiency compressor E Filter drier solid core P Side entry power and control knockouts F Micro channel aluminum tube aluminum fin...

Page 8: ...nd proper unit operation Rigging and handling Exercise care when you move the unit Do not remove any packaging until the unit is near the place of installation To rig the unit attach chain or cable sl...

Page 9: ...g cables so that it lifts evenly All panels must be secured in place when the unit is lifted The condenser coils must be protected from rigging cable damage with plywood or other suitable material D A...

Page 10: ...t2 110 110 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 LEFT A 59 00 C D E F 4 19 27 31 89 00 21 19 11...

Page 11: ...3 16 5 1 4 Base Pan 17 13 16 View of Wall Across from Coil Gas Pipe Inlet 5 3 8 Table 6 ZKT06 through T12 unit clearances Direction Distance in Direction Distance in Top1 1 Units must be installed out...

Page 12: ...Figure 12 ZKT06 through T10 unit side duct openings Item Description A Disconnect switch cover B Power entry 2 1 2 C Control entry 7 8 D Power entry 2 1 2 E Convenience outlet cover F Convenience out...

Page 13: ...Unit model number Dimension in A B C D ZKT06 27 3 4 12 1 16 27 1 2 16 ZKT07 27 3 4 12 1 16 27 1 2 16 ZKT08 28 1 4 18 1 16 28 1 4 18 1 4 ZKT10 28 1 4 18 1 16 28 1 4 18 1 4 ZKT12 28 1 4 18 1 16 28 1 4 1...

Page 14: ...of curb 8 or 14 50 1 2 30 20 20 80 5 8 6 A B E G D F C Roof curb components Item Description A Return air B Supply air C Right side of the unit D Front side of the unit E 2 typ F Insulated deck under...

Page 15: ...he following steps 1 Remove the side duct covers 2 Orient the supply panel with the painted surface up 3 Slide the supply panel between the heat exchanger and the unit bottom The painted surface must...

Page 16: ...ere POE polyolester compressor lubricants are known to cause long term damage to some synthetic roofing materials Procedures that risk oil leakage include but are not limited to the following Compress...

Page 17: ...of a disconnect on the unit Confirm compliance with local code before you install a disconnect on the unit Electrical line must be sized properly to carry the load Note Use copper conductors only Each...

Page 18: ...g unit with or without electric heat Figure 23 Typical field wiring disconnect cooling unit with gas heat THREE PHASE POWER SUPPLY FACTORY OR FIELD SUPPLIED DISCONNECT GROUND LUG TERMINAL BLOCK TB1 L1...

Page 19: ...ostat to indicate the Occupied on X is an input to the thermostat to display Error Status condi ons 3 W2 Y1 G OCC Y2 X R SD 24 C W1 24V COM OUT Return or Space Humidity Sensor 0 10VDC TB4 3 823 R RAH...

Page 20: ...50 E09 6 8 1 18 9 38 9 44 4 50 50 E18 13 5 2 37 5 53 3 60 2 60 70 E24 18 0 2 50 0 69 0 75 8 70 80 E36 25 5 2 70 8 95 0 101 9 100 110 230 13 1 83 1 20 5 2 1 5 2 5 5 0 0 None 38 9 44 4 50 50 E09 9 0 1...

Page 21: ...90 90 E24 18 0 2 50 0 74 5 81 3 90 90 E36 25 5 2 70 8 100 5 107 4 110 110 E54 40 6 2 112 7 152 9 159 7 175 175 230 22 4 149 0 35 0 2 1 9 6 5 5 0 0 None 68 4 73 9 90 90 E18 18 0 2 43 3 68 4 73 9 90 90...

Page 22: ...18 9 43 3 48 8 50 60 E18 13 5 2 37 5 58 8 65 7 60 70 E24 18 0 2 50 0 74 5 81 3 80 90 E36 25 5 2 70 8 100 5 107 4 110 110 230 13 1 83 1 20 5 2 1 9 6 5 5 0 0 None 43 3 48 8 50 60 E09 9 0 1 21 7 43 3 48...

Page 23: ...0 100 E24 18 0 2 50 0 80 0 86 8 90 100 E36 25 5 2 70 8 106 0 112 9 110 125 E54 40 6 2 112 7 158 4 165 2 175 175 230 22 4 149 0 35 0 2 1 14 0 5 5 0 0 None 72 8 78 3 90 100 E18 18 0 2 43 3 72 8 78 5 90...

Page 24: ...9 48 9 54 4 60 60 E18 13 5 2 37 5 65 8 72 7 70 80 E24 18 0 2 50 0 81 5 88 3 90 90 E36 25 5 2 70 8 107 5 114 4 110 125 230 13 1 83 1 20 5 2 1 5 2 5 5 10 0 None 48 9 54 4 60 60 E09 9 0 1 21 7 48 9 54 4...

Page 25: ...9 100 100 E24 18 0 2 50 0 87 0 93 8 100 100 E36 25 5 2 70 8 113 0 119 9 125 125 E54 40 6 2 112 7 165 4 172 2 175 175 230 22 4 149 0 35 0 2 1 9 6 5 5 10 0 None 78 4 83 9 100 100 E18 18 0 2 43 3 78 6 85...

Page 26: ...8 9 53 3 58 8 60 70 E18 13 5 2 37 5 71 3 78 2 80 80 E24 18 0 2 50 0 87 0 93 8 90 100 E36 25 5 2 70 8 113 0 119 9 125 125 230 13 1 83 1 20 5 2 1 9 6 5 5 10 0 None 53 3 58 8 60 70 E09 9 0 1 21 7 53 3 58...

Page 27: ...100 110 E24 18 0 2 50 0 92 5 99 3 100 110 E36 25 5 2 70 8 118 5 125 4 125 150 E54 40 6 2 112 7 170 9 177 7 175 200 230 22 4 149 0 35 0 2 1 14 0 5 5 10 0 None 82 8 88 3 100 110 E18 18 0 2 43 3 84 1 91...

Page 28: ...44 192 AFUE Steady state efficiency 80 80 80 80 80 80 80 80 80 80 No burners 4 6 4 6 4 6 6 8 6 8 No stages 24 24 24 24 24 24 24 24 24 24 Temperature rise range F 20 50 35 65 15 45 30 60 10 40 25 55 20...

Page 29: ...er sheave AK74 AK64 AK74 AK61 AK89 AK74 AK84 AK74 AK74 BK77 Belt A49 A49 A49 A49 A56 A54 A56 A54 A54 BX55 Motor HP each 1 1 2 2 1 1 2 3 2 3 2 3 3 5 RPM 1725 1725 1725 1725 1725 1725 1725 1725 1725 172...

Page 30: ...uperseded by local codes or gas utility requirements See Table 14 Gas pipe sizing capacity of pipe on page 31 The heating value of the gas may vary by locality You must check the value with the local...

Page 31: ...d scale Hammer on the outside of the pipe and blow out loose particles Before initial start up make sure that all gas lines external to the unit are purged of air The gas supply must be a separate lin...

Page 32: ...compartment with the heating elements extending into the supply air chamber All electric heaters are fused and intended for use with single point power supply Motorized outdoor damper The motorized ou...

Page 33: ...nts should be set to the same value Free cooling Four types of free cooling options are available dry bulb changeover single enthalpy dual enthalpy changeover and Auto Dry bulb changeover For dry bulb...

Page 34: ...f cooling If the economizer output goes to minimum position and the SAT is less than Economizer setpoint 1 F the control starts a 12 minute timer to de energize a compressor output If at any time the...

Page 35: ...cts through circuit trace to 24V IN pin HOT C COM Mixed air temperature sensor input from 10K 77 F Type III negative temperature coefficient thermistor The MAT parameter reports input status F C 3 65...

Page 36: ...tation sensor MOA Range parameter sets the cubic feet per minute liters per second measured by the air monitoring station sensor when it outputs 10 VDC Fr Air parameter reports input status 0 50000CFM...

Page 37: ...o the 4 stage board and or fault detection diagnostics board 1 When wiring the unit and other devices using the SA Bus and FC Bus see Table 32 Smart Equipment economizer board analog outputs Location...

Page 38: ...economizer actuator Connects through circuit trace to 24V IN pin COM EX FAN 24 VAC hot output to energize power exhaust fan contactor coil VFD enable relay coil ExFan parameter reports output status O...

Page 39: ...elt nuts Figure 28 Belt adjustment CFM static pressure and power altitude and temperature corrections Use the information below to assist in the application of the product at altitudes at or exceeding...

Page 40: ...is assumed The 1 5 in static pressure given is at an elevation of 5 000 ft The first step is to convert this static pressure to equivalent sea level conditions Sea level static pressure 1 5 832 1 80...

Page 41: ...95 BHP exceeds the maximum continuous BHP rating of the 1 5 HP motor The 2 HP motor is required 6 1268 RPM is within the range of the 2 HP drives 7 Using the 2 HP motor and drive 5 turns open will ach...

Page 42: ...94 1 43 1147 1 56 1201 1 67 1254 1 78 1309 1 90 1366 2 02 2600 902 0 97 962 1 16 1020 1 33 1076 1 47 1130 1 61 1183 1 73 1237 1 85 1291 1 96 1346 2 07 1402 2 19 2800 941 1 16 1002 1 35 1059 1 52 1115...

Page 43: ...1 1 Blower performance includes gas heat exchangers and 2 in filters See the static resistance table for additional applications 2 See the RPM selection table to determine the required motor sheave se...

Page 44: ...1347 1 84 1424 1 98 1503 2 14 1586 2 31 2600 957 1 10 1030 1 30 1102 1 47 1174 1 62 1246 1 76 1320 1 89 1394 2 03 1471 2 17 1551 2 33 1634 2 51 2800 1009 1 32 1082 1 51 1154 1 69 1225 1 84 1298 1 98...

Page 45: ...HP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 3 HP and field supplied drive Standard 3 HP and drive High static 5 HP and drive 3200 837 1 44 889 1 57 940 1 69 989 1 81 1036 1 93 1...

Page 46: ...r 10 12 hours run time Method two 1 Drill two 5 16 inch holes one in the return air duct as close to the inlet of the unit as possible and another in the supply air duct as close to the outlet of the...

Page 47: ...are presented for side and bottom duct configuration 6 Determine the unit measured CFM from the blower performance table external static pressure and the number of turns the variable motor sheave is o...

Page 48: ...review the installation for any installation errors leaks or undesirable systems effects that can result in loss of airflow Even small changes in blower speed can result in substantial changes in stat...

Page 49: ...0 17 0 18 0 21 0 22 0 26 3900 0 09 0 29 0 23 0 19 0 20 0 23 0 24 0 28 4100 0 09 0 31 0 24 0 21 0 22 0 25 0 26 0 31 4300 0 10 0 30 0 25 0 23 0 24 0 28 0 29 0 34 4500 0 11 0 35 0 26 0 25 0 26 0 30 0 31...

Page 50: ...ressor 1 is energized If compressor 1 is active for first stage cooling or the first compressor is locked out compressor 2 is energized In free cooling mode if the call for the second stage of cooling...

Page 51: ...ressure switch opens for greater than 5 seconds the UCB de energizes the associated compressor initiates the ASCD and if the other compressor is idle stops the condenser fans If the call for cooling i...

Page 52: ...n within the Smart Equipment Controller menu Those modes consist of a Normal Alternate and Aux each mode is described below Normal cooling mode When there is a call for first stage cooling with or wit...

Page 53: ...is a call for cooling and the economizer is operating as first stage of cooling All safety devices function as previously described Optional Aux mode The Aux mode available with hot gas reheat units i...

Page 54: ...ce Reducing the value below the correct setpoint gives shorter ON cycles and may result in the lowering of the temperature within the conditioned space See Table 28 for the required electric heat anti...

Page 55: ...Flame sense Flame sensing occurs at all times If W1 is not present and a flame is sensed for 2 seconds the draft motor is energized and the GV is kept off The ICB halts any operation until a flame is...

Page 56: ...e thermostat setting lower than the conditioned space temperature This resets any flash codes Gas heat anticipator setpoints The anticipator setpoint must be correct Too high of a setting results in l...

Page 57: ...is unit has two stages of gas heat The first stage is 60 of the full fire input and is considered the minimum input for the furnace The intended input for each furnace is shown in Table 32 The table a...

Page 58: ...just the second stage 100 input pressure first then adjust first stage 60 input pressure 1 Turn off electrical power to the unit 2 Using the outlet pressure port on the gas valve connect a manometer t...

Page 59: ...e Figure 33 Typical flame Figure 34 Typical gas valve Charging the unit All ZK units use thermal expansion devices Charge the unit to nameplate charge Navigation components for the Smart Equipment con...

Page 60: ...e also effective for economizer free cooling supply air temperature reset when the ClgStgs parameter is set for 1 or more G Continuous indoor blower request 24 VAC input switched from R OCC Occupancy...

Page 61: ...erminate temporary occupancy COM Common for ST and SSO inputs Negative of VDC circuit for ST and SSO inputs SSO Space Sensor Offset input from 0 to 20K potentiometer Positive of VDC circuit 3 625 VDC...

Page 62: ...hot return from Air Proving Switch When this optional input is enabled the air proving switch must close within 30 seconds of initiation of indoor blower operation and not open for greater than 10 se...

Page 63: ...ntilation cooling reheat or heat pump heating demands C2 24 VAC hot output for compressor 2 Not effective for one stage compressor UCBs If demand is present and permissions allow compressor 2 operatio...

Page 64: ...f the 15 VDC reading to C circuit for powering an optional netstat and or Multi Touch gateway C Common for SA BUS power and communication circuits Also incorporated in the J8 6 pin phone jack connecto...

Page 65: ...than FC bus BACnet MSTP communication circuit FC FC Field Connected BUS BACnet MSTP communication Positive of the VDC typically a fluctuating 1 5 to 3 5 volts reading to COM at least 0 25 volts lower...

Page 66: ...air Cable2 2 We recommend 26 AWG solid 6 wire 3 twisted pairs cable as the best fit for fabricating modular cables with the modular jack housing assembly Be sure the cable you use fits the modular jac...

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