INS-18
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
(10) Definitive fixing of Indoor Units
1. Remove the spacer from Indoor Unit’s back.
2. Suspend each Indoor Unit to upper hooks of fixing plate and move Unit left side and right side to
check if it is properly fixed. In the end, hold Unit on both sides firmly, and press it to the installation plate
till definitive fixing.
(12) Test of system
Carry out automatic Test procedure which is described in “Section 1:
General Information
”
of this Service
Manual, or start the system’s Indoor Units normally (manual Test) by using corresponding IR Remote
Controllers.
System Test in Cooling mode is only possible at indoor temperature not lower than 17°C.
System manual Test in Heating mode is possible at indoor temperature not higher than 30°C.
In particolar, during system manual Test, check the following:
1. Is it possible to adjust room temperature correctly on each Indoor Unit?
2. Is it possible to change fan speed freely on all Indoor Units?
3. Are there abnormal noises or excessive vibrations coming from Indoor Units or from the Outdoor Unit?
4. Do outlet flaps properly reply to impulses sent by remote control, and do they work properly on all
Units?
5. Does air supplied by Indoor Units reach all installation environment uniformily?
6. Does condensate water drip from Indoor Units into the room?
7. Does temperature difference between air inlet and air outlet (
D
T) on each Indoor Unit show a
satisfactory performance of system?
(11) Final checks
1. On Outdoor Unit, check the correspondence between wiring and piping connections for each Indoor
Unit.
2. Check way and laying of drain hose and electrical wiring for each Indoor Unit.
3. In case of extension of connection lines (power supply and signal lines) between the Outdoor Unit
and one or more Indoor Units, check the correspondence between wires and terminals on terminal
blocks, both for signal lines and power supply lines.
4. Check heat insulation of refrigerant pipings and drain hoses.
5. Check the correspondence between available power supply specifications and plate specifications
required by system.
6. Check correct water drainage by carrying out the Test on each drain hose.
7. Check if each Indoor Unit is fixed to its wall fixing plate firmly.
8. By using an electronic gas leakage detector, at high sensitivity and specific for HFC, check if there
are refrigerant leakages near refrigerant connections (Flare connections).
Upper hook
Lower hook
Spacer (to be removed after
finishing wiring).