Carrier WeatherMaster Series - Page 55

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C160121

Fig. 70 -- Typical RTU Open Controller Wiring Diagram

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Table of Contents1
Safety Considerations3
Rated Indoor Airflow (Cfm)4
Installation9
Jobsite Survey9
Step 1 - Plan for Unit Location9
Roof Mount9
Step 2 - Plan for Sequence of Unit Installation9
Curb- - Mounted Installation10
Pad- - Mounted Installation10
Frame- - Mounted Installation10
Step 3 - Inspect Unit10
Step 4 - Provide Unit Support10
Roof Curb Mount10
Slab Mount (Horizontal Units Only)10
Alternate Unit Support (in Lieu of Curb or Slab Mount)12
Step 5 - Field Fabricate Ductwork12
For Units with Accessory or Optional Electric Heaters12
Step 6 - Rig and Place Unit12
Positioning on Curb13
Step 7 - - Convert to Horizontal and Connect Ductwork13
Step 8 - Install Outside Air Hood14
Economizer and Two Position Damper Hood Package Removal and Setup - Factory Option14
Economizer Hood and Two- - Position Hood14
Step 9 - Install External Condensate Trap and Line15
Step 10 - Make Electrical Connections15
Field Power Supply15
Units with Factory- - Installed16
Non- - Fused Disconnect or HACR16
Non- - Fused Disconnect or HACR18
All Units18
Convenience Outlets18
Hacr20
Factory- - Option Thru- - Base Connections20
Units Without Thru- - Base Connections20
Field Control Wiring20
Thermostat20
Central Terminal Board21
Unit Without Thru- - Base Connection Kit21
Heat Anticipator Settings21
Electric Heaters21
Single Point Boxes and Supplementary Fuses22
Single Point Boxes Without Fuses22
Low- - Voltage Control Connections22
Humidi- -Mizer R System Control Connections23
Humidi- - Mizer - Space RH Controller23
Economi$Er R X (Factory- -Installed Option)25
Product Description25
System Components25
Specifications25
W7220 Economizer Module25
Electrical25
Inputs25
Outputs26
Environmental26
Economizer Module Wiring Details26
S- - Bus Sensor Wiring26
CO 2 Sensor Wiring27
Interface Overview27
User Interface27
Keypad27
Menu Structure28
Setup and Configuration28
Time- - out and Screensaver28
Sequence of Operation34
Enthalpy Settings38
Two- -Speed Fan Operation38
Checkout39
Power up39
Initial Menu Display39
Power Loss (Outage or Brownout)39
Status39
Checkout Tests39
Troubleshooting39
Alarms39
Clearing Alarms39
Low Ambient Control (Factory Option)40
Staged Air Volume (Savt) with Variable40
Frequency Drive (Factory- -Installed Option)40
Comfortlink (Factory- -Installed Option)40
Premierlinkt Controller (Factory- - Installed Option)43
Supply Air Temperature (SAT) Sensor46
Outdoor Air Temperature (OAT) Sensor46
Economi$Er246
Field Connections46
Space Sensors49
Connect Thermostat49
Configure the Unit for Thermostat Mode49
Economizer Controls50
Indoor Air Quality (CO ) Sensor50
Outdoor Air Quality Sensor50
Space Relative Humidity Sensor or Humidistat Connections51
Smoke Detector/Fire Shutdown (FSD)51
Filter Status Switch52
Supply Fan Status Switch52
Remote Occupied Switch52
Power Exhaust (Output)52
CCN Communication Bus52
RTU Open Controller System54
Supply Air Temperature (SAT) Sensor57
Outdoor Air Temperature (OAT) Sensor57
Economi$Er257
Field Connections58
Space Temperature (SPT) Sensors58
Indoor Air Quality (CO 2 ) Sensor58
Outdoor Air Quality Sensor59
Space Relative Humidity Sensor or Humidistat59
Smoke Detector/Fire Shutdown (FSD)60
Connecting Discrete Inputs61
Communication Wiring - - Protocols61
General61
Local Access62
RTU Open Controller Troubleshooting62
Outdoor Air Enthalpy Control63
Differential Enthalpy Control63
Return Air Enthalpy Sensor63
Smoke Detectors64
Step 11 - Adjust Factory- -Installed Options64
Step 12 - Install Accessories65
Step 13 - Check Belt Tension65
Start- - up Checklist67

Carrier WeatherMaster Series - Page 55

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