Johnson Controls ZL Series Installation Manual page 3

Contents
General............................................................................. 5
Safety considerations............................................... 5
Inspection.................................................................. 6
Reference................................................................... 6
Renewal parts............................................................ 6
Approvals................................................................... 7
Nomenclature............................................................8
Installation....................................................................... 9
Installation safety information................................ 9
Preceding installation............................................... 9
Limitations......................................................... 11
Location....................................................................12
Clearances..........................................................12
Rigging and handling............................................. 12
ZL08 to 14 unit weights.......................................... 14
Ductwork.................................................................. 17
Duct covers........................................................ 18
Condensate drain....................................................19
Compressors............................................................19
Filters........................................................................ 19
Power and control wiring.......................................19
Thermostat wiring.............................................20
Typical field power and control wiring................. 21
Typical power wiring......................................... 21
Electrical data.......................................................... 23
Electrical data ZL08 to 14 static indoor
blowers - without powered convenience
outlet...................................................................23
Electrical data ZL08 to 14 standard
indoor blower - with powered
convenience outlet............................................25
Electrical data ZL08 to 14 medium indoor
blower - without powered convenience
outlet...................................................................27
Electrical data ZL08 to 14 medium indoor
blower - with powered convenience
outlet...................................................................29
Electrical data ZL08 to 14 high indoor
blower - without powered convenience
outlet...................................................................31
Electrical data ZL08 to 14 high indoor
blower - with powered convenience
outlet...................................................................33
Physical data............................................................ 35
Optional gas heat....................................................43
Gas piping.......................................................... 43
Gas connection........................................................43
Gas piping recommendations......................... 43
Combustion air and flue exhaust..........................44
Options/accessories............................................... 45
Economizer........................................................ 45
Power exhaust................................................... 45
Rain hood........................................................... 45
Blower phasing........................................................45
Blower rotation..................................................45
Adjusting the belt tension................................ 46
Altitude and temperature correction for
cfm, static pressure, and power...................... 46
Airflow performance...............................................49
ZL 08 to 14 side duct application (belt
drive)...................................................................51
ZL 08 to 14 bottom duct application (belt
drive)...................................................................53
Supply air drive adjustment.............................55
Operation....................................................................... 61
Cooling operation................................................... 61
Free cooling operation with economizer............. 61
Economizer with single enthalpy sensor............. 61
Economizer with dual enthalpy sensors.............. 62
Economizer with power exhaust........................... 62
Motorized outdoor air dampers............................62
High-pressure limit switch..................................... 62
Low-pressure limit switch...................................... 62
Evaporator low limit................................................62
Low ambient cooling.............................................. 63
Safety controls......................................................... 63
Compressor protection.......................................... 63
Space humidity sensing......................................... 63
Reheat mode sequence of operations for
Smart Equipment™ control only............................64
Normal occupied operation mode..................64
Normal cooling mode....................................... 64
Normal reheat mode........................................ 64
Alternate mode..................................................66
Optional aux mode........................................... 67
Gas heating operation............................................67
Gas heat ignition control board function.............67
Ignition control board on standby.................. 67
Call for heat........................................................67
Pressure switch proving................................... 68
Installation Manual ZL Series 7.5- 12.5 Ton 60 Hertz R-410A
Johnson Controls Ducted Systems
3