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MULTI V IV System Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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If the ambient temperature changed between the time when pressure was applied and when the pressure drop was checked, adjust results
by factoring in approximately 1.45 psi for each 2°F of temperature difference.
Correction formula = (Temperature when pressure was applied - Temperature when pressure drop was checked) x 0.01.
Example: When pressure (550 psig) was applied, temperature was 80.6°F; 24 hours later when pressure drop (540 psi) was checked,
temperature was 68°F. Thus, 80.6 - 68 x 0.01 = 0.126. In this case, the pressure drop of 0.126 was due to temperature difference, therefore,
there is no leak in the refrigerant piping system.
Close
Liquid pipe
Liquid pipe
Nitrogen gas
Close
Slave Unit
Close
Close
Master Unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Liquid pipe
Vapor pipe
Vapor pipe
Liquid pipe
Liquid pipe
Liquid pipe
Vapor pipe
Vapor pipe
High-pressure
vapor pipe
Close
Low-pressure
vapor pipe
Close
Heat recovery
unit
Liquid side
Low-pressure vapor pipe
High-pressure vapor pipe
Low-pressure
vapor side
High-pressure
vapor side
During pressurization, the nitrogen gas cylinder must be positioned vertically to prevent the nitrogen from entering the refrigeration system in
its liquid state. Do not lay the nitrogen cylinder on its side.
REFRIGERANT PIPING INSTALLATION
Pressure (Leak) Testing
Pressure (Leak) Testing for Heat Recovery Systems
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