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48EK034
Carrier 48EK034 Manuals
Manuals and User Guides for Carrier 48EK034. We have
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Carrier 48EK034 manual available for free PDF download: Installation And Service Instructions Manual
Carrier 48EK034 Installation And Service Instructions Manual (65 pages)
Single Package Rooftop Units Electric Cooling/Gas Heating
Brand:
Carrier
| Category:
Gas Heater
| Size: 1.42 MB
Table of Contents
Table of Contents
1
Safety Considerations
1
Installation
1
Provide Unit Support
1
Step 2 - Rig and Place Unit
2
Alternate Unit Support
2
Roof Mount
2
Step 3 - Field Fabricate Ductwork
2
Roof Curb
3
Unit Leveling Tolerances Dimensions
4
VFD — Variable Frequency Drive
5
Base Unit Dimensions, 48EJ,EK024-034
5
Base Unit Dimensions, 48EW,EY024-034
7
Base Unit Dimensions, 48EW,EY038-048
8
Rigging Label
9
Physical Data
10
Evaporator Fan Motor Data
12
Air Distribution — Thru-The-Bottom
12
Air Distribution — Thru-The-Side
12
Step 4 - Install Flue Hood
12
Field Gas Piping
13
Step 5 — Trap Condensate Drain
13
Step 6 — Install Gas Piping
13
Step 7 — Controls Options
13
Controls Options and Configurations
14
Field Control Remote Start/Stop
15
Indoor Air Quality Sensor Configuration
15
Variable Air Volume (Vav) Applications
15
Field Power Supply
16
Power Wiring
16
Routing through Bottom of Unit
16
Step 8 - Make Electrical Connections
16
Control Board Diagram
17
Electrical Data
18
Field Control Wiring
21
Field Power Wiring Connections
21
Heat Interlock Relay
21
Sensor Wiring (CV or VAV)
21
Control Box Diagram (Sizes 038-048)
22
Field Control Temperature Sensor Wiring
22
Field Control Thermostat Wiring
22
Carrier Comfort Network Interface
23
CCN Connection Approved Shielded Cables
23
Remote Field Control
23
Space Temperature Averaging Wiring
23
Color Code Recommendations
24
Economizer
24
Economizer Hood Assembly
24
Make Outdoor-Air Inlet Adjustments
24
Step 9 - Make Outdoor-Air Inlet
24
Adding Seal Strip to Top of Hood Sides
25
Accessory Differential Enthalpy Control
26
Adding Foam Strip to Blockoff Baffle
26
Adding Foam Strip to Hood Side
26
Economizer Settings
26
Attaching Seal Strip to Filter Cover
27
Differential Enthalpy Control and Sensor
27
Differential Enthalpy Sensor Installation
27
Disable Economizer
27
Economizer Details
28
Psychrometric Chart for Enthalpy Control
28
Wiring Connections for Solid-State Enthalpy Control (HH57AC077)
28
Position Power Exhaust/Barometric Relief Damper Hood
29
Vav Building Pressure Transducer
29
Vav Duct Pressure Transducer
29
Electrical Connections
30
Install Field-Fabricated Wind Baffles
30
Pressure Transducer Locations
30
Step 11 — Install All Accessories
30
Adjustments
31
Crankcase Heaters
31
Refrigerant Service Ports
31
Variable Frequency Drive (VFD)
31
Power Exhaust
32
VFD Factory-Installed Jumpers
32
VFD Supply Air Pressure Set Point
32
Condenser Fans and Motors
33
Crankcase Heater
33
Evaporator Fan
33
Potentiometer Signal Levels
33
DIP Switch Configuration
34
DIP Switch Factory Settings
34
Power Exhaust Default Set Points
34
Available External Static Pressure
35
Fan Performance, 48EJ/EK024-034 — Vertical Discharge Units
35
Fan Performance, 48EJ,EK038,044 — Vertical Discharge Units
36
Fan Performance — Power Exhaust
38
High Efficiency Motors
38
Motor Limitations
38
Standard Efficiency Motors
38
Air Quantity Limits
39
Filter Replacement
39
Outdoor-Air Inlet Screens
39
Return-Air Filters
39
Cooling, Variable Volume Units
40
User Defined Set Points
40
Gas Heating, Constant Volume (CV) Units
41
Gas Heating, Variable Air Volume (Vav) Units
41
MORNING WARM-UP (VAV Only)
41
Heat Interlock Relay Wiring
42
Morning Warm-Up
42
Space Temperature Reset Sensor
42
Field-Supplied Smoke Detector Wiring
43
Power Exhaust Operation
43
Smoke Control Modes
43
Supply Air Temperature Reset
43
Start-Up
31
Time Guard Circuit
44
Head Pressure Control
44
Capacity Control, Cooling
44
Service
44
Combustion-Air Blower
45
Main Burners
45
Flue Gas Passageways
45
Lubrication
45
Evaporator Fan Service and Replacement
46
Belt Tension Adjustment
46
Typical Gas Heating Section
46
Gas Heat Section Details
46
Evaporator-Fan Motor Replacement
47
Condenser-Fan Adjustment
47
Power Failure
47
Gas Valve Adjustment
47
Overtemperature
48
Overcurrent
48
Compressor Protection
48
Main Burner Removal
48
Evaporator Fan Motor Protection
49
Condenser-Fan Motor Protection
49
High- and Low-Pressure Switches
49
Compressor Lockout Logic
49
Typical Wiring Schematics
50
Typical VAV 115-V Control Circuit
52
Typical CV 115-V Control Circuit
53
Typical VAV 24-V Control Circuit
54
Typical CV 24-V Control Circuit
55
Typical Refrigerant Circuiting
56
Troubleshooting
56
Typical Refrigerant Circuiting (48EJ,EK,EW,EY038,044)
57
Igc Control Scheme (Heating and Cooling)
59
Alarm Codes for the Igc Control Board
60
IGC Control Board LED Alarms
60
Control Board LED Alarms
60
Diagnostic Leds
60
I/O Channel Designations Base Module — CV
61
I/O Channel Designations Base Module — VAV
61
I/O Channel Designations Expansion Module (Field-Installed)
61
Packaged Service Training
62
Pre-Start-Up
63
Start-Up Checklist
63
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