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48EJ, EW, EK, EY024-048 installation instructions Ð Typical VAV 115-vControl Circuit
Models:
EY024-048
EK
48EJ
1
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Troubleshooting
Install
Ð Control Board Diagram
Evaporator Fan Service and Replacement
Dimension
Ð Field Power Wiring Connections
to Filter Track Assembly
Ð Power Exhaust Default Set Points
Ð Potentiometer Signal Levels
Ð Make Outdoor-AirInlet Adjustments
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Image 52
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Fig. 57 Ð Typical VAV
115-v
Control Circuit
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Image 52
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Contents
CONTENTS
SAFETY CONSIDERATIONS
INSTALLATION Step 1 Ð Provide Unit Support
Step 10 Ð Position Power Exhaust/Barometric
Step 3 Ð Field Fabricate Ductwork
Instructions continued on page
UNIT LEVELING TOLERANCES DIMENSIONS
Fig. 1 Ð Roof Curb Sizes
Degrees and Inches
UNIT LEVELING TOLERANCES DIMENSIONS
Fig. 2 Ð Roof Curb Sizes
Degrees and Inches
Fig. 3 Ð Base Unit Dimensions, 48EJ,EK024-034
Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048
Fig. 5 Ð Base Unit Dimensions, 48EW,EY024-034
Fig. 6 Ð Base Unit Dimensions, 48EW,EY038-048
NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE
WHEN RIGGING
Fig. 7 Ð Rigging Label
Table 1 Ð Physical Data
Table 1 Ð Physical Data cont
Fig. 9 Ð Air Distribution Ð Thru-the-Side
Fig. 8 Ð Air Distribution Ð Thru-the-Bottom
Fig. 10 Ð Flue Hood Location
Fig. 11 Ð Combustion Fan Housing Location
Fig. 12 Ð Condensate Drain Trap Piping Details
Typical Roof Curb or Slab Mount Shown
Fig. 13 Ð Field Gas Piping
·support a eld test for eld checkout
Fig. 14 Ð Field Control Remote Start/Stop
Fig. 15 Ð Indoor Air Quality Sensor Conguration
Step 8 Ð Make Electrical Connections
Fig. 16 Ð Control Board Diagram
Table 4 Ð Electrical Data
Table 4 Ð Electrical Data cont
Table 4 Ð Electrical Data cont
UNIT
Fig. 17 Ð Field Power Wiring Connections
Fig. 18 Ð Control Box Diagram Sizes
Fig. 19 Ð Control Box Diagram Sizes
Fig. 21 Ð Field Control Temperature Sensor Wiring
Fig. 20 Ð Field Control Thermostat Wiring
CV or VAV Units
Fig. 22 Ð Space Temperature Averaging Wiring
Table 5 Ð CCN Connection Approved Shielded Cables
Step 9 Ð Make Outdoor-AirInlet Adjustments
Table 6 Ð Color Code Recommendations
Fig. 23 Ð Adding Seal Strip to Top of Hood Sides
Fig. 25 Ð Adding Seal Strip to Mounting Flange of
Hood Sides
Fig. 26 Ð Adding Seal Strip to Hood Top
to Filter Track Assembly
Fig. 28 Ð Adding Foam Strip to Hood Side
Fig. 29 Ð Adding Foam Strip to Blockoff Baffle
Fig. 30 Ð Mounting Angle Without Tabs Attached
Fig. 31 Ð Mounting Angle With Tabs Attached to
Filter Track Assembly
Fig. 32 Ð Attaching Seal Strip to Filter Cover
Fig. 34 Ð Wiring Connections for Solid-State
Fig. 35 Ð Psychrometric Chart for
Enthalpy Control HH57AC077
Enthalpy Control
Fig. 37 Ð Barometric Relief Damper and Power
Exhaust Mounting Details
Fig. 38 Ð Pressure Transducer Locations
Fig. 39 Ð Motormaster III Baffle Details
START-UP
Fig. 41 Ð VFD Factory-InstalledJumpers
Table 7 Ð VFD Supply Air Pressure Set Point
Direct Digital Controls DIP Switch Congura
Table 8 Ð Potentiometer Signal Levels
Table 10 Ð DIP Switch Conguration
Table 9 Ð Power Exhaust Default Set Points
Table 11 Ð DIP Switch Factory Settings
AIRFLOW
AIRFLOW
3.20
Table 15 Ð Fan Performance Ð Power Exhaust
Table 16 Ð Motor Limitations
Sequence of Operation
Table 17 Ð Air Quantity Limits
Table 18 Ð User Dened Set Points
GAS HEATING, VARIABLE AIR VOLUME VAV UNITS
Fig. 42 Ð Heat Interlock Relay Wiring
Fig. 43 Ð Space Temperature Reset Wiring
Fig. 44 Ð Field-SuppliedSmoke Detector Wiring
Table 19 Ð Smoke Control Modes
SERVICE
with 2 Compressors
with 2 Compressors and 2 Unloaders
Fig. 45 Ð Door Latch
Fig. 46 Ð Spark Gap Adjustment
Lubrication
Evaporator Fan Service and Replacement
Belt Tension Adjustment Ð To adjust belt tension
Evaporator Fan Performance Adjustment
Fig. 47 Ð Typical Gas Heating Section
Evaporator-FanMotor Replacement
Condenser-FanAdjustment
Gas Valve Adjustment
Fig. 49 Ð Evaporator-FanAlignment and Adjustment
Fig. 50 Ð Belt Tension Adjustment
Fig. 51 Ð Condenser-FanAdjustment
Fig. 52 Ð Cooling Charging Chart
Fig. 53 Ð Cooling Charging Chart
Fig. 54 Ð Gas Valve Fig. 55 Ð Main Burner Removal
Ð Adjustable Heat Anticipator
Page
Fig. 57 Ð Typical VAV 115-vControl Circuit
Fig. 58 Ð Typical CV 115-vControl Circuit
Fig. 59 Ð Typical VAV 24-vControl Circuit
Fig. 60 Ð Typical CV 24-vControl Circuit
TROUBLESHOOTING
HPS Ð High-PressureSwitch
LEGEND FPS Ð Freeze Protection Switch
LPS Ð Low-PressureSwitch
HPS Ð High-PressureSwitch
LEGEND FPS Ð Freeze Protection Switch
LPS Ð Low-PressureSwitch
LEGEND IDM Ð Induced-DraftMotor
Fig. 64 Ð IGC Control Heating and Cooling
IGC Ð Integrated Gas Unit Controller
Table 22 Ð IGC Control Board LED Alarms
Table 23 Ð Control Board LED Alarms
Page
PACKAGED SERVICE TRAINING
TEMPERATURES
PRE-START-UP
ELECTRICAL
PRESSURES
GENERAL