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68AC430-100-2
MCC 68AC430-100-2 Manuals
Manuals and User Guides for MCC 68AC430-100-2. We have
1
MCC 68AC430-100-2 manual available for free PDF download: Operation & Service Manual
MCC 68AC430-100-2 Operation & Service Manual (38 pages)
Brand:
MCC
| Category:
Air Conditioner
| Size: 1 MB
Table of Contents
Table of Contents
2
Safety Summary
5
Description
7
Introduction
7
Table 1-1 68AC430 Models
7
Table 1-2 Additional Support Manuals
7
General Description
8
Rooftop Unit
8
Condensing Section
8
Evaporator Section
8
Figure 1-1 AC430 Rooftop Unit
8
BT-324 Microprocessor
9
Refrigeration System Component Specifications
9
Electrical Specifications - Motors
9
Safety Devices
9
Air Conditioning Refrigeration Cycle
10
Heating Cycle
10
Figure 1-2 Refrigerant/Heat Flow Diagram, AC430
11
Figure 1-3 AC430 with BT324 Control Board
12
OPERATION BT324 Controller
13
Starting, Stopping and Operating Instructions
13
Starting
13
Stopping
13
Pre-Trip Inspection
13
Figure 3-1 BT324 Controller
13
Sequence of Operation Bt324
14
Function of Keys When "Engine On" and Controller Active
14
Illuminating Indications (Display)
14
Operating Instructions Bt324
14
Display
14
Ventilation
14
Reheat (Optional)
14
Temperature Indication
14
Changing between °F (Fahrenheit) and °C (Celcius )
14
Troubleshooting
16
Table 3-1 General System Troubleshooting Procedures
16
No Evaporator Air Flow or Restricted Air Flow
17
Service
18
Maintenance Schedule
18
Removing Cover
18
Installing R-134A Manifold Gauge/Hose Set
19
Figure 4-1 Manifold Gauge Set (R-134A)
19
Manifold Gauge Set
20
Removing the Refrigerant Charge
20
Removing Entire System Charge
20
Refrigerant Leak Check
20
Evacuation and Dehydration
20
General
20
Preparation
20
Figure 4-2 In-Line Service Connections
20
Adding Refrigerant to System
21
Checking Refrigerant Charge
21
Adding Full Charge
21
Checking for Noncondensibles
21
Checking and Replacing High or Lowpressure Cutout Switch
21
Replacing High or Low Pressure Switches
21
Checking High Pressure Switches
22
Checking Low Pressure Switches
22
Filter-Drier
22
To Check Filter-Drier
22
To Replace Filter-Drier Assembly
22
Figure 4-3 Checking High Pressure Switch
22
Figure 4-4 Filter-Drier Removal
22
Servicing the Heat Valve
23
Coil Replacement
23
Internal Part Replacement
23
Replace Entire Valve
23
Service Valves
24
Replacing Return Air Filters
24
Figure 4-5 Heat Valve
24
Figure 4-6 Service Valve R134A (High Side)
24
Thermostatic Expansion Valve
25
Figure 4-10 Return Air Grill Assembly with Diffuser and Composite Frame Showing
25
Figure 4-7 Return Air Grill Assembly with Air Filter Showing
25
Figure 4-8 Diffuser and Filter Element
25
Figure 4-9 Filter, Diffuser and Composite Frame
25
Figure 4-11 Thermostatic Expansion Valve
26
Figure 4-12 Thermostatic Expansion Valve Bulb and Thermocouple
26
Superheat Measurement
26
Valve Replacement
26
Table 4-1 R-134A Temperature - Pressure Chart
28
Electrical
29
Introduction
29
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