Vogt
®
VT Service Manual
2-1
Installation Instructions
2.
Installation Information
Important Safety Notice.
This information is intended for use by individuals possessing adequate
backgrounds of electrical, refrigeration and mechanical experience. Any attempt to repair major equipment
may result in personal injury and property damage. The manufacturer or seller cannot be responsible for
the interpretation of this information, nor can it assume any liability in connection with its use.
Special Precautions To Be Observed When Charging Refrigeration Systems.
Only
technically-qualified persons, experienced and knowledgeable in the handling of refrigerant and operation
of refrigeration systems, should perform the operations described in this manual. All local, federal, and
EPA regulations must be strictly adhered to when handling refrigerants.
If a refrigeration system is being charged from refrigerant cylinders, disconnect each cylinder when empty
or when the system is fully charged. A gage should be installed in the charging line to indicate refrigerant
cylinder pressure. The cylinder may be considered empty of liquid R404A refrigerant when the gage
pressure is 25 pounds or less, and there is no frost on the cylinder. Close the refrigerant charging valve
and cylinder valve before disconnecting the cylinder. Loosen the union in the refrigerant charging line--
carefully to avoid unnecessary and illegal release of refrigerant into the atmosphere.
! CAUTION !
Immediately close system charging valve at commencement of defrost or thawing
cycle if refrigerant cylinder is connected. Never leave a refrigerant cylinder
connected to system except during charging operation. Failure to observe either
of these precautions can result in transferring refrigerant from the system to the
refrigerant cylinder, over-filling it, and possibly causing the cylinder to rupture
because of pressure from expansion of the liquid refrigerant brought on by an
increase in temperature.
! CAUTION !
Always store cylinders containing refrigerant in a cool place. They should never be exposed to
temperatures higher than 110
°
F and should be stored in a manner to prevent abnormal mechanical shocks.
Also, transferring refrigerant from a refrigeration system into a cylinder can be very dangerous and is not
recommended.
! CAUTION !
It is not recommended that refrigerant be transferred from a refrigeration system
directly into a cylinder. If such a transfer is made, the refrigerant cylinder must be
an approved, CLEAN cylinder--free of any contaminants or foreign materials--and
must be connected to an approved recovery mechanism with a safety shutoff
sensor to assure contents do not exceed net weight specified by cylinder
manufacturer or any applicable code requirements.
! CAUTION !
