48HJ004---007 48HE003---006
SAFETY CONSIDERATIONS
Installation Instructions
ELECTRICAL SHOCK HAZARD
SLAB MOUNT Horizontal Units Only
INSTALLATION
Step 3 -InstallExternal Trap for Condensate Drain
FIRE, EXPLOSION HAZARD
48HE,HJ
Fig. 2 --- Roof Curb Details
48HJ004-007
PROPERTY DAMAGE HAZARD
Step 5 -InstallFlue Hood
Step 6 -InstallGas Piping
positioning
PROPERTY DAMAGE HAZARD
48HE,HJ
Fig. 7 --- Roof Curb Alignment
FIRE, EXPLOSION HAZARD
Fig. 8 --- 48HJ004-007Base Unit Dimensions
48HE,HJ
C06112
Fig. 9 --- 48HE003-006Base Unit Dimensions
48HE,HJ
C06113
field power supply
Fig. 11 --- Gas Piping Guide With Accessory
Thru-the-CurbService Connections
field control wiring
48HE,HJ
Table 1-PhysicalData 48HJ
48HE,HJ
TABLE 1 - PHYSICAL DATA 48HJ cont
Table 2-PHYSICALDATA 48HE
48HE,HJ
TABLE 2 - PHYSICAL DATA 48HE cont
48HE,HJ
Fig. 12 --- Power Wiring Connections
Fig. 15 --- Field Control Wiring
CONTROL
48HE,HJ
Table 3-ElectricalData 48HE
48HE003---006
48HE,HJ
Table 4-ElectricalData 48HJ
48HE,HJ
Table 4-ElectricalData 48HJ cont
Fig. 16 --- Accessory Field-InstalledHumidistat
Step 8 -Adjust Factory-InstalledOptions
cobra energy recovery units
Assembly
LTLO - Low Temperature Lockout
Humidistat Wiring 208/230-VUnit Shown
Damper Installed
Factory Wiring
Outdoor Air Temperature Sensor OAT
Fig. 23 --- Outdoor-AirDamper Position Setting
Install the Supply Air Temperature SAT Sensor
Install the Indoor Air Quality CO2 Sensor
48HE,HJ
TEMPERATURE SENSOR
TEMPERATURE SENSOR
Table 5-PremierLink Sensor Usage
48HE,HJ
Fig. 25 --- PremierLinktController Installed
Fig. 26 --- Typical PremierLink Control Wiring
PremierLink
Fig. 28 --- Differential Enthalpy Control
48HE,HJ
Return Air Enthalphy Sensor
Sensor and Mounting Plate 33AMKITENT006
Outdoor Air Temperature OAT Sensor
Fig. 31 --- Typical Access Panel Locations
Fig. 33 --- Indoor Coil Access Panel Relocation
48HE,HJ
Fig. 35 --- Filter Installation
Supply Air Temperature SAT Sensor
Table 6-SupplyAir Sensor Temperature
48HE,HJ
EconoMi$er IV Wiring
48HE,HJ
Outdoor Enthalpy Changeover
Differential Enthalphy Control
Exhaust Set Point Adjustment
48HE,HJ
Fig. 39 --- Outdoor-AirDamper Leakage
48HE,HJ
Fig. 43 --- Outside Air Temperature
Fig. 44 --- Return Air Temperature or Enthalpy
Minimum Position Control
Fig. 45 --- Enthalpy Changeover Set Points
48HE,HJ
+ TR
Demand Controlled Ventilation DCV
Step 9 -Adjust Evaporator-FanSpeed
Fig. 47 --- CO2 Sensor Maximum Range Setting
CO2 Sensor Configuration
48HE,HJ
48HE,HJ
Table 8-CO2 Sensor Standard Settings
Fig. 50 --- Indoor-FanPulley Adjustment
Fig. 49 --- Belt Drive Motor Mounting
Table 12-Accessorystatic pressure
48HE,HJ
Table 11-Evaporator-FanMotor Data - Standard Motor
Table 15-48HEOutdoor Sound Power Total Unit
GENERAL FAN PERFORMANCE NOTES
Table 14-48HJOutdoor Sound Power Total Unit
48HE,HJ
48HE,HJ
Belt Drive
Belt Drive
48HE,HJ
Belt Drive
48HE,HJ
Standard Motor Belt Drive
48HE,HJ
Standard Motor Belt Drive
48HE,HJ
AIRFLOW
48HE,HJ
1075
48HE,HJ
Belt Drive
Belt Drive
48HE,HJ
Belt Drive
Belt Drive
48HE,HJ
Standard Motor Belt Drive
48HE,HJ
Standard Motor Belt Drive
48HE,HJ
0.80
48HE,HJ
0.64
Step 6 -InternalWiring
PRE-START-UP
START-UP
Step 7 -RefrigerantService Ports
Step 11 -MainBurners
48HE,HJ
Step 10 -Cooling
Table 37-AltitudeCompensation
Step 14 -VentilationContinuous Fan
Step 13 -SafetyRelief
48HE,HJ
Step 15 -OperatingSequence
48HE,HJ
Fig. 51 --- DX Cooling Temperature
Fig. 52 --- Economizer Temperature
Routine 3 OAT
Subcooling Mode
UNITS WITH HUMIDI-MIZER ADAPTIVE
DEHUMIDIFICATION SYSTEM Normal Design Operation
Fig. 53 --- Humidi-MiZerNormal
Fig. 56 --- Cleaning Condenser Coil
SERVICE
Step 1 -Cleaning
48HE,HJ
48HE,HJ
Step 3 -Condenser-FanAdjustment
Step 6 -HighPressure Switch
Fig. 57 --- Propping Up Top Panel
Fig. 61 --- Cooling Charging Chart
Step 7 -Loss-of-ChargeSwitch
Fig. 60 --- Cooling Charging Chart
48HE,HJ
Fig. 63 --- Cooling Charging Chart
Fig. 62 --- Cooling Charging Chart
Fig. 64 --- Cooling Charging Chart, 48HJ004 with
Fig. 65 --- Cooling Charging Chart, 48HJ005 with
TO USE COOLING CHARGING CHART, STANDARD UNIT
Fig. 66 --- Cooling Charging Chart, 48HJ005 with
Fig. 67 --- Cooling Charging Chart, 48HJ007 with
48HE,HJ
Fig. 70 --- Cooling Charging Chart
Fig. 68 --- Cooling Charging Chart
Fig. 69 --- Cooling Charging Chart
Fig. 71 --- Cooling Charging Chart
48HE,HJ
Step 12 -LimitSwitch
Table 40-LEDError Code Description
Step 13 -BurnerIgnition
5. Reinstall burner rack as described above
Fig. 74 --- Spark Gap Adjustment
Cleaning and Adjustment
Step 15 -ReplacementParts
48HE,HJ
Contactor, Compressor
Step 2 -Economi$erIV Troubleshooting
TROUBLESHOOTING
Step 1 -UnitTroubleshooting
economi$er IV troubleshooting completion
Table 41-LEDError Code Service Analysis
48HE,HJ
COMPONENT DAMAGE HAZARD
Table 42- Heating Service Analysis
48HE,HJ
Table 45-CoolingService Analysis
48HE,HJ
48HE,HJ
Table 46-EconoMi$erIV Input/Output Logic
Fig. 76 --- EconoMi$er IV Functional View
I. PRELIMINARY INFORMATION
START-UPCHECKLIST Remove and Store in Job File
TEMPERATURES
III.START-UP