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McQuay RDT User Manual
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IM-738
Page 9
Figure 6. Air Handler Piping (Staggered
DX)
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Legend
1 - Filter-Dri
er
2 - Liquid Line Solenoid V
alve
3 - Sightglass
4 - Hot Gas Bypass Solenoid V
alve (Optional)
5 - Hot Gas B
ypass V
alve (Optio
nal)
6 - Thermostatic Expansion V
alve
7 - Distributor
8
10
Table of Contents
Table of Contents
2
Introduction
3
Unit Nameplate
3
Compressor Nameplate
3
Gas Burner Nameplate
3
Hazard Identification Information
3
Nomenclature
3
Unit Description
4
Condenser Fan Arrangement
6
Refrigerant Circuit Schematic
6
Refrigeration Piping
7
Control Locations
10
Control Panel Locations
12
Controls, Settings, and Functions
18
Mechanical Installation
20
Receiving Inspection
20
Unit Clearances
20
Ventilation Clearance
21
Overhead Clearance
21
Roof Curb Assembly and Installation
22
Post and Rail Mounting
24
Rigging and Handling
24
Reassembly of Split Units
26
RPS Factory Split at Condenser
27
RPS/RDT Factory Split at Fan
33
Piping Recommendations
35
Holding Charge
35
Leak Testing
35
Evacuation
35
Refrigeration Service Valves
37
Charging the System
37
Refrigerant Charge
37
Subcooling
38
Condensate Drain Connection
38
Unit Piping
38
Steam Coil Piping
39
Steam Piping Recommendations
39
Steam Trap Recommendations
39
Damper Assemblies
40
Cabinet Weatherproofing
41
Installing Ductwork
41
Installing Duct Static Pressure Sensor Taps
42
Electrical Installation
44
Field Power Wiring
44
Field Control Wiring
47
Preparing Unit for Operation
48
Relief Damper Tie-Down
48
Spring Isolated Fans
48
Adjustment of Scroll Dampers
49
Adjustment of Supply Fan Thrust Restraints
49
Adjustment of Seismic Restraints
50
Sequences of Operation
51
Power-Up
51
Fan Operation
51
Economizer Operation
51
Mechanical Cooling Operation
52
Heating
53
Wiring Diagrams
54
Typical Power Circuit Wiring
55
Typical Main Circuit Wiring
56
(Inlet Vane & Controls by Others)
56
Typical Main Circuit Wiring (VFD & Controls by Others)
57
Typical Condensing Unit Control for RPS with Microtech II Control
58
Typical Condensing Unit Control W Control Schematic for RPS
59
Typical Supply / Return Fan Control Circuit Wiring (no Controls)
60
Typical Gas Furnace Control Circuit (Modulating Burner, Mixed Air Intake)
61
Unit Options
62
Enthalpy Control
62
Hot Gas Bypass
63
Speedtrol (NA Unit Sizes 015C - 030C)
64
External Time Clock
65
Smoke Detectors
65
Freeze Protection
65
Mixed Air Temperature Alarm
65
Duct High Pressure Limit
65
Variable Inlet Vanes
66
Variable Frequency Drive Operation
71
Convenience Receptacle/Section Lights
71
Designflow‰ Outdoor Air Damper Option
71
Propeller Exhaust Fan Option
73
Propeller Exhaust Fan Control
76
Check, Test, and Start Procedures
77
Before Start-Up
77
Power-Up
77
Fan Start-Up
77
Economizer Start-Up
78
Compressor Start-Up
78
Heating System Start-Up
80
Air Balancing
80
Sheave Alignment
81
Drive Belt Adjustment
81
Mounting and Adjusting Motor Sheaves
82
Rooftop Equipment Warranty Registration Form
85
Final Control Settings
89
Maintenance
93
Preventive Maintenance
93
Unit Storage
93
Gas Furnace
94
Bearing Lubrication
94
Setscrews
95
Supply Fan Wheel-To-Funnel Alignment
95
Refrigerant Charge
96
Replacing Failed Refrigerant Sensors or Switches
96
Winterizing Water Coils
96
Replacement Parts List
97
Service and Warranty Procedure
98
Limited Product Warranty (North America)
99
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McQuay RDT Specifications
General
Brand
McQuay
Model
RDT
Category
Air Handlers
Language
English
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