Countdown to compliance
MHIE R22 Ban on the introduction and supply of new air conditioning systems operating on R22
MHIE R22 Supply of new R22 refrigerant used to service RAC equipment is banned
MHIE R22 Only reclaimed or recycled R22 refrigerant may be used from January 2010 until 31 December 2014
MHIE R22 Following the phase-out, the cost of R22 refrigerant could quadruple in price year on year and supplies of recycled R22 could run out by 2013
MHIE R22 Systems operating on R22 refrigerant will be classed as 'not serviceable'
MHIE R22 A complete ban on R22 refrigerant, including reclaimed or recycled, comes into force
Time to act before the ban
R22 Renew solutions
MHI R22

R22 Renew Option A

R22 – R410a upgrade solution for existing MHI FD split systems

Replace old R22 outdoor unit with new FDC R410a outdoor unit: the FDC unit operates at reduced pressure which allows connection to existing R22 pipework.

Retain existing R22 pipework (subject to survey to ensure pipe wall is thick enough): simply use the old equipment to purge the old oil from the system, then install the new outdoor unit and it will charge the system with new R410a refrigerant.

Replace old R22 indoor unit with new R410a indoor unit: now biggest ever range of units from wall mount to ceiling cassettes, ceiling suspended and floor standing.

R22 Renew Option B

R22 – R410a upgrade solution for existing MHI KX VRF systems

Replace old R22 outdoor unit with new FDCR R410a outdoor unit: 8HP and 10HP models are available with the same output capacity as the old models but with reduced physical size to ensure easiest installation.

Retain existing R22 pipework (subject to survey to ensure pipe wall is thick enough): use old R22 outdoor unit to purge old oil and contaminants via valve box unit and oil scavenge sump – takes just a few hours – then install the new outdoor unit and it will charge the system with new R410a refrigerant.

Possibly retain old indoor units (subject to survey to ensure they are suitable to run on new R410a refrigerant). New R410a units will give better performance than upgraded R22 units.

R22 Renew Option C

R22 – R410a upgrade solution with EEV kit for VRF systems
(MHI and other manufacturers' VRF systems)

Replace old R22 outdoor unit with new FDCR R410a outdoor, as option B.

Retain old R22 pipework by purging old oil and contaminants via a valve box unit and oil scavange sump, and charging with new R410a refrigerant, as option B.

 Install new MHI EEV (Electric Expansion Valve) which throttles back the new R410a refrigerant pressure to allow the use of existing indoor units or AHU fan coils. Retain existing indoor units and AHU fan coils (but de-activate their on-board expansion valves). New EEV ensures optimum performance with new R410a refrigerant.