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