Quick Start Manual
3
Installation, Operation & Maintenance  HTV/HTD/HTH SERIES  Heat Controller, Inc.
 WARNING! 
 WARNING! 
 CAUTION! 
WARNING! To avoid the release of refrigerant into the 
atmosphere, the refrigerant circuit of this unit must be serviced 
only by technicians who meet local, state, and federal 
profi ciency requirements.
CAUTION! To avoid equipment damage, DO NOT use these 
units as a source of heating or cooling during the construction 
process. The mechanical components and fi lters will quickly 
become clogged with construction dirt and debris, which may 
cause system damage.
WARNING! All refrigerant discharged from this unit must be 
recovered WITHOUT EXCEPTION. Technicians must follow 
industry accepted guidelines and all local, state, and federal 
statutes for the recovery and disposal of refrigerants. If a 
compressor is removed from this unit, refrigerant circuit oil will 
remain in the compressor. To avoid leakage of compressor oil, 
refrigerant lines of the compressor must be sealed after it is 
removed.
Safety
Warnings, cautions and notices appear throughout this manual. 
Read these items carefully before attempting any installation, 
service, or troubleshooting of the equipment. 
DANGER: Indicates an immediate hazardous situation, which if 
not avoided will result in death or serious injury. DANGER labels 
on unit access panels must be observed.
WARNING: Indicates a potentially hazardous situation, which if 
not avoided could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation or an 
unsafe practice, which if not avoided could result in minor or 
moderate injury or product or property damage.
NOTICE: Notifi cation of installation, operation or maintenance 
information, which is important, but which is not hazard-related.










