Ruud RH2TZ4821STANNJ - User Manual

AIR HANDLERS
FEATURING INDUSTRY STANDARD R-410A REFRIGERANT:
(-)H1P Standard Efciency with Aluminum Coil
(-)H2T High Efciency with Aluminum Coil (2-Stage Non-Communicating)
INSTALLATION INSTRUCTIONS
92-20521-127-05
These instructions are intended as an aid to qualied licensed
service personnel for proper installation, adjustment and
operation of this unit. Read these instructions thoroughly before
attempting installation or operation. Failure to follow these
instructions may result in improper installation, adjustment,
service or maintenance possibly resulting in fire, electrical
shock, property damage, personal injury or death.
WARNING
!
$&&5(',7('
,62

Summary

1.0 Safety Information

General Warnings and Safety Precautions

Covers essential safety warnings related to installation, operation, and potential hazards.

1.1 Proposition 65 and Material Cautions

2.6 Indoor;Outdoor Match-Up Importance

2.7 Quality Installation Importance

3.0 Installation

3.1 Tools and R-410 A Refrigerant

Lists required tools and provides information on R-410A refrigerant.

3.1.1 Required Tools for R-410 A

Essential tools needed for installing and servicing R-410A refrigerant systems.

3.1.3 R-410 A Quick Reference Guide

3.6 Ductwork

Ductwork Connection Warning

Warning regarding connecting return ductwork to other heat producing devices.

3.7 Return Air Filter

3.8 Refrigerant Line Connections & Charging

3.8.3 Brazing

Procedures and precautions for brazing refrigerant lines, including nitrogen purging.

3.8.5 Evacuation

3.8.6 Refrigerant Charging

3.9 TXV Sensing Bulb Attachment

3.10 Condensate Drain

3.12 Electrical Wiring

3.12.1 Configuring Unit for 208 Volt Power

Steps to reconfigure the control transformer and blower motor for 208V operation.

3.12.2 Grounding Requirements

Requirements and methods for properly grounding the unit.

3.12.3 Power Wiring

Guidance on selecting and connecting power wiring and circuit protection.

3.12.4 Copper Wire Size (3% Voltage Drop)

3.12.5.1 Electrical Data: (-)H1 PZ Blower Motor Only

3.12.5.2 Electrical Data: (-)H2 T Blower Motor Only

3.12.6.1 Electrical Data with Electric Heat: (-)H1 PZ

(-)H1 PZ Heater Kit Models, Ratings, and Connections

Tables detailing heater kit models, KW, amps, circuit protection, and connection types for (-)H1PZ.

3.12.6.2 Electrical Data with Electric Heat: (-)H2 T

(-)H2 T Heater Kit Models and Ratings

Tables detailing heater kit models, KW, amps, and circuit protection for (-)H2T.

3.12.7 Electric Heater Kit Supplemental Information

Contractor Breaker Sizing and Kit Information

Guidance on selecting maximum and minimum circuit breaker sizes for heater kits.

3.12.8 Control Wiring

3.12.9 Thermostat & Control Wiring Connections

3.13 Airflow

3.13.1 General Airflow Operating Limits

3.13.2 Selecting Indoor Blower Motor Speed

3.13.2.1 (-)H1 P Models (PSC Motor)

Instructions for selecting blower speed for (-)H1P PSC motors based on static pressure.

3.13.2.2 (-)H2 T Models (2-Stage Airflow)

3.13.2.3 (-)H2 T Models (Single Stage Air-Flow)

3.13.3.1 240 V Airflow Performance Data: (-)H1 P (PSC Motor)

240 V Airflow Performance Tables for (-)H1 P

3.13.3.2 115;208 V Airflow Performance Data: (-)H1 P (PSC Motor)

115;208 V Airflow Performance Tables for (-)H1 P

3.13.3.3 115;208;240 V Airflow Performance Data: (Constant Torque Motor)

Airflow Performance Tables for (-)H2 T (Constant Torque Motor)

4.0 Start-Up

Pre-Start Checklist

Checklist of essential items to verify before initiating system start-up.

4.2 System Start-Up and Operational Check-Out

Procedure for starting up the system and performing operational checks.

4.3 Sequence of Operation

4.3.2 Electric Heat Mode Operation

4.3.3 Heat Pump Heating Mode Operation

4.4 Correcting Electric Heat kW for Voltage

4.5 Calculating Electric Heat Capacity in BTUH

4.6 Checking Indoor Air-Flow

4.6.1 Estimating CFM Using External Static Pressure

4.6.2 Estimating CFM Using Electric Heat Temperature Rise

4.7 Checking Refrigerant Charge

5.0 Components & Controls

5.1 Blower Motor Details

5.3 Blower Control

5.6 Indoor Coil Assembly Details

7.0 Maintenance

Maintenance Safety Warning

7.5 Blower Assembly Removal & Replacement

Blower Assembly Removal Safety Warning

7.6 Motor Replacement Procedure

7.7 Blower Wheel Replacement

8.0 Diagnostics

Blower Motor Operation Troubleshooting

Troubleshooting causes and fixes for blower motor not operating.

Drainage and Vibration Troubleshooting

Heating and Frozen Coil Troubleshooting

Airflow and TXV Control Troubleshooting

9.0 Wiring Diagrams

9.1 Wiring Diagram (-)H1 P - 115 V

9.2 Wiring Diagram (-)H1 P - 208;240 V

9.3 Wiring Diagram (-)H2 T - 115 V

9.4 Wiring Diagram (-)H2 T - 230 V

Ruud RH2TZ4821STANNJ Specifications

General

Brand	Ruud
Model	RH2TZ4821STANNJ
Category	Air Handlers
Language	English