IOM SYSVRF2 AHU BOX0620 20220209 134828067 20220209 141028052

02
2 INTRODUCTION
Ground the air conditioner.
Do not connect the ground wire to gas or water
pipes, lightning rods or a telephone ground wire.
Incomplete grounding may result in electrical
shock.
Be sure to install a ground leakage breaker.
Failure to install a ground leakage breaker may
result in electrical shock.
Connect the ODU wires first, and then
connect the AHU control box wires.
You are not allowed to connect the air
conditioner to a power source (including wiring
and piping) until the air conditioner installation is
completed.
While following the instructions in this
installation manual, install drain piping in
order to ensure proper drainage and insulate
the piping in order to prevent condensation
from occurring.
Improper drain piping may result in water
leakage and property damage.
Install the AHU control box and ODUs, power
supply wiring, and connecting wires at least
1 m away from televisions or radios in order
to prevent image interference or noise.
Depending on the radio waves, a distance of 1 m
may not be sufficient enough to eliminate the
noise.
The appliance is not intended for use by
young children or infirm persons without
supervision.
Young children should be supervised to ensure
that they do not play with the appliance.
CAUTION
The AHU control box can be connected to the heat
pump/heat recovery ODU and the third party AHU. Every
third party AHU can be connected to one AHU control
box or to several AHU control boxes in a parallel
connection (up to four). This manual describes how to
install and operate an AHU control box.
Using an AHU control box, a unit can be controlled by
either return air temperature or by outlet air temperature.
When return air temperature control is selected, the
connected AHU can be considered to be a standard
IDU.
Users can opt to use the factory controller or a third
party controller
The AHU control box has an input port of 0-10V. A
third party controller is required to provide 0-10V of
input. The system capacity requirement or tempera-
ture can be set based on 0-10V input. For details,
refer to Section 5.2.2 Setting Capacity Output Mode
via a Third Party Controller (Type 1) and Section 5.2.3
Setting Temperature Mode via a Third Party Control-
ler (Type 2)
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Part and conponents
Electric control box cover assembly
E-part box assembly
Electronic expansion valve assembly
Electric control box welding assembly
Clip
Cable gland
Rubber ring
Fixing board,popes