Carrier 50EJ Manuals

Manuals and User Guides for Carrier 50EJ. We have 1 Carrier 50EJ manual available for free PDF download: Installation, Start-Up And Service Instructions Manual

Carrier 50EJ Installation, Start-Up And Service Instructions Manual

Carrier 50EJ Installation, Start-Up And Service Instructions Manual (57 pages)

Single-Package Rooftop Units Electric Cooling with Electric Heat Option

Brand: Carrier | Category: Air Conditioner | Size: 1.7 MB

Table of Contents

Table of Contents
1
Installation
1
Provide Unit Support
1
Safety Considerations
1
Roof Curb
2
- Base Unit Dimensions
  4
- Positioning
  8
- Rigging Label
  8
Step 2 - Rig and Place Unit
8
- Physical Data
  9
- Evaporator Fan Motor Data
  11
- Roof Mount
  11
Installation
11
Step 3 - Field Fabricate Ductwork
11
Step 4 - Make Unit Duct Connections
11
Step 5 - Trap Condensate Drain
11
Step 7 - Make Electrical Connections
15
- Field Control Wiring
  16
- Routing through Bottom/Side of Unit
  16
- Thermostat/Sensor Wiring
  16
- VAV Units
  16
- Electrical Data
  17
- Control Box Diagram
  24
- CCN Connection Approved Shielded Cables
  25
- Color Code Recommendations
  25
- Field Control Thermostat Wiring
  25
- Make Outdoor-Air Inlet Adjustments
  25
Step 8 - Make Outdoor-Air Inlet
25
Adjustments
32
Start-Up
32
- VFD Factory-Installed Jumpers
  32
- VFD Set Point
  32
- Direct Digital Controls DIP Switch Conﬁguration
  33
- Potentiometer Signal Levelss
  33
- Power Exhaust
  33
- Power Exhaust Default Set Points
  33
- DIP Switch Conﬁguration
  34
- DIP Switch Factory Settings
  34
- Cooling, Constant Volume Units
  35
- Sequence of Operation
  35
- Fan Performance, Vertical Discharge Units
  36
- Air Quantity Limits
  38
- Motor Limitations
  39
- User Deﬁned Set Points
  39
- Cooling, Variable Volume Units
  40
- Heating, Constant Volume Units
  40
- Heating, Variable Air Volume Units
  40
- Heat Interlock Relay Wiring
  41
- Morning Warm-Up
  41
- Power Exhaust Operation
  41
- Space Temperature Reset
  41
- Capacity Control, Cooling
  42
- Field Test
  42
Service
42
- Time Guard Circuit
  42
- Cleaning
  43
- Evaporator Fan Performance Adjustment
  43
- Evaporator Fan Service and Replacement
  43
- Lubrication
  43
- Belt Tension Adjustment
  44
- Condenser-Fan Adjustment
  44
- Evaporator-Fan Motor Replacement
  44
- Refrigerant Charge
  44
- Compressor Lockout Logic
  45
- Control Circuits
  45
- Evaporator-Fan Motor Protection
  45
- Freeze Protection Thermostat
  45
- Service
  45
Troubleshooting
46
Start-Up Checklist
56

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