TECHNICAL SUPPORT MANUAL Split System Heat Pump - N4H3 - Safety Labeling and Signal Words

Oct 24, 2026

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Technical support manual content for a Split System Heat Pump model N4H3, covering safety labeling conventions and warning signal-word usage. Defines DANGER, WARNING, CAUTION, and NOTE, explains that DANGER is for immediate product-label hazards while other terms apply on labels and throughout applicable manuals. Includes a prominent WARNING about risks of death, personal injury, and/or property damage from improper reading, installation, or repair, and outlines intent for qualified service technicians and compliance with local and NFPA/National Electrical Code requirements.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages34

Reading Time1 h 26 min

AccessFree to download

Safety Labeling and Signal Words

Signal Words in Manuals

Signal Words on Product Labeling

Wiring Diagrams

Charging Chart

Tech Labels (Expanded Data) - Cooling

Tech Labels (Expanded Data) - Heating

Cooling Multiplying Factors

Heating Multiplying Factors

Condenser Only Data

Exploded Drawings

Parts List

Model Number Identification

TECHNICAL SUPPORT MANUAL Split System Heat Pump N4H3 | Safety Labeling and Signal Words | | | --- | --- | | DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING, CAUTION, and NOTE are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manuals that may apply to the product.
DANGER − Immediate hazards which will result in severe personal injury or death.
WARNING − Hazards or unsafe practices which could result in severe personal injury or death. CAUTION − Hazards or unsafe practices which may result in minor personal injury or product or property damage.
NOTE − Used to highlight suggestions which will result in enhanced installation, reliability, or operation. | Signal Words in Manuals
The signal word WARNING is used throughout this manual in the following manner:
! WARNING
The signal word CAUTION is used throughout this manual in the following manner:

! CAUTION

Signal Words on Product Labeling
Signal words are used in combination with colors and/or pictures on product labels. | TABLE OF CONTENTS Wiring Diagrams ............................ 2 − 3 Charging Chart ................................. 4 Tech Labels (Expanded Data) − Cooling ....... 5 − 11 Tech Labels (Expanded Data) − Heating ...... 12 − 18 Cooling Multipying Factors .................. 19 − 24 Heating Multipying Factors ................. 25 − 30 Condenser Only Data ...................... 15 − 18 Exploded Drawings ........................ 31 − 33 Parts List ................................. 34 − 36 Model Number Identification ................ 37 − 38 | ! WARNING | | --- | | DEATH, PERSONAL INJURY, AND/OR PROPERTY DAMAGE HAZARD
Failure to carefully read and follow this warning could result in equipment malfunction, property damage, personal injury and/or death. Installation or repairs made by unqualified persons could result in equipment malfunction, property damage, personal injury and/or death. The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments. Installation must conform with local building codes and with the National Electrical Code NFPA70 current edition or Canadian Electrical Code Part 1 CSA C.22.1. | 428 04 5100 00 April 2006 2 428 04 5100 00 Model Sizes: 18, 24, 30, 36, 42, 48 1. Symbols are electrical representation only. 2. Compressor and fan motor furnished with inherent thermal protection. 3. To be wired in accordance with National Electric N. E.C. and local codes. 4. N. E.C. class 2, 24 V circuit, min. 40 VA required, 60 VA on units installed with LLS. 5. Connection for typical heat pump thermostat. For other arrangements see installation instructions. 6. Use copper conductors only. Use conductors suitable for at least 75°C (167°F) . 7. If indoor section has a transformer with a grounded secondary, connect the grounded side to “C” on the circuit board. 8. When start capacitor and relay are installed, start thermistor (PTC) is not used. 9. CH not used on all units. 10. If any of the original wire, as supplied, must be replaced, use the same or equivalent wire. 11. Check all electrical connections inside control box for tightness. 12. Do not attempt to operate unit until service valves have been opened. 13. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow pressures to equalize between high and low side before starting. TECHNICAL SUPPORT MANUAL Split System Heat Pump: N4H3 428 04 5100 00 3 Model Size: 60 1. Symbols are electrical representation only. 2. Compressor and fan motor furnished with inherent thermal protection. 3. To be wired in accordance with National Electric N. E.C.

FAQs

What do the signal words DANGER, WARNING, CAUTION, and NOTE mean in the manual?

DANGER indicates immediate hazards that will result in severe injury or death. WARNING and CAUTION indicate hazards or unsafe practices that could cause severe injury or minor injury/property damage. NOTE highlights suggestions that enhance installation, reliability, or operation.

How is “WARNING” used across this manual?

The signal word WARNING is used throughout the manual in the manner shown under the manual’s signal-word section.

What are the key safety risks and requirements mentioned in the main warning?

Failure to read and follow the warning can lead to equipment malfunction, property damage, personal injury, and/or death. Installation or repairs must be performed by qualified service technicians, and installation must conform to local building codes and the relevant electrical code editions.

Oct 24, 2026

Upload by Rowan