Specifications

Shops
As shop premises are regularly upgraded and
the operating conditions for each can vary so
much, large-scale air conditioning manage-
ment is very difficult. Consequently, a VRF air
conditioning system matched to each shop is
an ideal solution.
and a broad range of other applications
ing to the building and application
Comfort
Economy
Ease of
operation
Ease of
maintenance
High
efficiency
Convenience
COMPACT
VRF
SYSTEM
+
AS7 / AS9 /
AS12 / AS14
AS18 / AS24 / AS30
Remote controller (Option) Accessories
P10 P11 P11
UTB-YPB / UTB-GPB/
UTB-TPB
UTB-YRA / UTB-GRA/
UTB-TRA
(Duct type only)
P19P18
UTB-YUB / UTB-GUB/
UTB-TUB
*1. Network converter (UTR-YGCA) is required, when installing group remote controller.
*1
P10P9
A compact VRF System that responds
to the needs of each building
Backed by advanced air conditioning technology, this compact VRF
System was developed to meet six key requirements: high efficiency,
economy, comfort, convenience, ease of operation, and easy mainte-
nance. This VRF System delivers a comfortable and economical en-
vironment.
Wireless remote
controller
IR receiver unit Simple remote controllerWired remote
controller
UTB-YDB / UTB-GDB
Group remote
controller
Wall mounted
type
Wall mounted type
(Compact)
3
Preparations
Start of work
Refrigerant
Oil
Pressure ratio
R22R410A R407C
Mineral oilPOE oil POE oil
1Approx. 1.6 Approx. 1.1
R410A Work Notes
R410A
Work flow
26
Always check the refrigerant used.
Always use the specified refrigerant.
Air purging by refrigerant gas is strictly prohibited.
Use a special vacuum pump with reverse check mechanism.
Calculate the refrigerant additional charging amount, and
charge a suitable amount. (The charge amount shall be en-
tered at the specified place on the outdoor unit.)
Use piping material of the specified thickness.
Do not use pipe with dust and dirt sticking to it during piping
connection work.
Always flow nitrogen during welding work.
Do not connect to the power source.
Customer demonstration
Prepare schedule of works
Refrigerant check
Operation chart preparation
Indoor unit installation
Refrigerant piping work
Drain piping work
Duct work
Insulation work
Outdoor unit foundation work
Outdoor unit installation
Address setting
Refrigerant piping connection (Outdoor unit)
Leak pressure test
Vacuum evacuation and drying
Refrigerant additional charging
Gas leakage check
Outside panel installation
Test run and adjustment
Hand over
Remote controller installation
Electric wiring work
SU MO TU WE TH FR SA
7
3 12 69 15 18 21
The working pressure of R410A is approximately 1.6 times higher than that of R22.
As the oil type is also different, be sure not to mix them.
Seal with nitrogen up to the set pressure.
After 24 hours, check whether or not the pressure in the pip-
ing has dropped.
Offices
The spaces within office premises can all
have different air conditioning requirements.
Energy saving and economic operation are
major issues and what is needed is an air
conditioning system which can be accurately
matched to each space and centrally con-
trolled.