SystemAir HHFlex C, Operating Instructions Manual, Page: 5 / 47

5
1 SAFETY CONSIDERATIONS
1.1 General
Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the installation are not
considered: operating pressures, presence of electrical components and voltages and the installation site (elevated plinths
and built-up up structures). Only properly qualified installation engineers and highly qualified installers and technicians,
fully trained for the product, are authorized to install and start-up the equipment safely. During all servicing operations
all instructions and recommendations which appear in the installation and service instructions for the product, as well as
on tags and labels fixed to the equipment and components and accompanying parts supplied separately, must be read,
understood and followed.
•
Apply all standard safety codes and practices.
•
Wear safety glasses and gloves.
•
Use the proper tools to move heavy objects. Move units carefully and set them down gently.
1.2 Avoid Electrocution
Only personnel qualified in accordance with IEC (International electro technical Commission) recommendations may be
permitted access to electrical components. It is particularly recommended that all sources of electricity to the unit be shut
off before any work is begun. Shut off the main power supply at the main circuit breaker or isolator.
1.3 Abbreviations used
AHU
Air Handling Unit
AI Analog Input
AO Analog Output
CHO Change Over Coil
CWC Cold Water Coil
DI Digital Input
DO Digital Output
EAT Extract Air Temperature
HWC Hot Water Coil
IAT Inlet Air Temperature (Sensor placed just before heat recovery exchanger)
OAT Outdoor Air Temperature
RAM Random Access Memory (volatile memory)