Unit installation

1. Metering device is installed in this outdoor condensing unit, no other metering device needs to be field-installed
anywhere else.
2. One refrigerant filter/strainer is installed in the outdoor unit, no other filter/strainer needs to be field-installed
anywhere else, otherwise it may cause extra pressure drop and even system under-performance or other
problems.
3. If a refrigerant drier is to be field-installed, must be of enough size and correct flow-direction, following drier
manufacturer's instruction. Fail to do so may cause unit problems.
4. Must check the indoor unit for leakage by checking if the indoor unit still holds the pressurized charge, by
breaking the seal left at indoor refrigerant copper line connection, before connecting it to the inter-connecting
refrigerant copper lines. If for some reason the break is made before you check it, must pressurize it and
check for leakage.
5. Professionally conduct general refrigeration practice to connect copper lines and seal-tight correctly and
properly. Must insulate and secure both discharge and suction copper lines.
6. Must keep the two valves at outdoor condensing unit front-seated (closed), and pressurize the refrigerant flow
cavities between the inter-connecting copper lines and indoor unit to check leakage, before move on to
conduct vacuum leakage test (20-30 minutes under 500 microns recommended).
7. Then back-seat (open) the two valves to release refrigerant factory-precharged in the outdoor condensing unit,
into the inter-connecting refrigerant copper lines and indoor unit, ONLY if the system leakage is checked and
passed (pressurization and vacuum check).
8. Must check all thermal functions at the final stage of installation. Both liquid and gas lines at outdoor
condensing unit valves, should be cold at cooling mode, and hot at heat pump mode. If not cold or hot (E4 or
E5 error code may show up at indoor unit to shut off the system and warn for system checking, must contact
installer or service provider to check refrigerant charge and/or other items, accordingly. How cold or how hot it
needs to be, varies upon ambient temperature, refrigerant charge/pipe length, indoor unit conditions and so on.
ATTENTIONS-MUST READ AND FOLLOW THE FOLLOWING, PRIOR TO CONNECTING REFRIGERANT LINES
P5 OF 38
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
P6 OF 38
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
Cover the interconnecting pipes before pulling
through any structures to avoid damage from debris
or any foreign material that may enter the refrigeration
system.
NOTES FOR REFRIGERANT RELATED HVAC PRODUCTS, SPECIFICALLY THE SPLIT TYPE
Thank you for purchasing our product from an authorized YMGI Products distributor. Once you have
opened the box it is required that you carefully read through all the manuals and forms that are enclosed
with your unit. The following shall be understood and agreed upon:
Check the delivery against the order and packing list to make sure there is no unit/part/accessory missing or
damaged.
Mark any unit/part/accessory missing on the delivery confirmation paperwork.
Report any freight damage to the carrier within 24 hours of the accepted delivery.
Report any unit/part/accessory missing or damaged to sales/customer service at YMGI Products within 24 hours
of the accepted delivery.
Failure to report damaged or missing pieces within 24 hours of the accepted delivery will void any responsibility
for YMGI Products or the carrier.
Before opening the box you will accept:
Due to continuous product engineering improvement,
as well as viewing angles and background effect, it is
possible that the contained unit may vary slightly from
the unit shown on the box or in specific literature.
All units will be shipped new and will not be used.
Although some units may be subjected to random
inspections during the shipping process, at no time
shall a unit that has been used be shipped as new.
This unit is manufactured with the highest standards
and is designed to operate free of defects. Failure of
the unit to work properly often depends on many
factors, not limited to but including, the quality of the
installation, power failures, water damage and or
damage to the unit as a result of dropping or other
mishandling.
Vacuum and conduct leakage check for the
interconnecting pipes and indoor unit. If there is any
leakage, locate the source of the leak and repair it
prior to system operation.
Make sure the system is sealed tight without any
leakage potential, before releasing refrigerant from
the condensing unit to the interconnecting pipes and
indoor unit.
For any technical questions, have the licensed
installer contact our service department from the
installation location.
For any information regarding pricing or product
availability, please contact our sales department or
an authorized distributor.
Before your licensed HVAC Technician finishes
the installation:
If the unit fails to operate properly, it is agreed that
the Licensed Installer (HVAC Technician) contacts
YMGI Products Technical Support and/or Customer
Service. It is important that only the Licensed
Installer contacts YMGI Products so that our
technical support representative may walk through
specific technical steps to help resolve the problem.
Important Installation Information:
It is agreed that ONLY a licensed HVAC Technician/
Installation shall conduct the electric and refrigerant-
related installation, including all trouble-shooting work
and will follow all Local/DOE/EPA Codes and Laws.
Failure to have the installation completed by a
licensed installer will void any and all warranties for
your unit.
Contact your licensed HVAC Technician to determine
what portions may be completed by anyone other
than the licensed installer.
It is recommended that the installer should not be
paid in full until all of the installation is completed
including testing of all modes of unit operation.
What you need to know during the installation or
operation of your unit:
Witness the HVAC Technician conduct a thorough
check of the system including all modes of unit
operation.
Have the HVAC Technician sign all necessary
paperwork including your warranty card.
It is recommended that you do not pay your licensed
HVAC Technician in full until your system is working
properly for 30 days.
If there are any problems with system operation,
immediately contact your HVAC Technician to have
the system evaluated.
Instruct the HVAC Technician to contact YMGI
Technical Support with any questions.
About the Warranty:
If the units are installed properly, following
manufacturer instructions, by a licensed HVAC
Technician, the units are covered with a standard
warranty which covers 5-year compressor and 1-year
parts only.
In standard warranty, no labor is included.
Extended warranty may be purchased only at the
time the original unit is purchased at an additional
cost that will extend the amount of time for the parts
warranty and may also include labor in some plans.
Units/Parts shipping is ground only. At an additional
fee, Expedited Express shipping may be requested
in writing.
9. Adjust/check the refrigerant charge per pressure/temperature (super-heat or sub-cooling) at the service valves,
or length of copper pipes, following the pressure-ambient temperature chart or 25' breaking point rule as
factory-recommended in the installation manual.