City Multi Heat Pump boilers PWFY-P
This is proving to be a very popular & cost effective upgrade to City Multi systems as it provides large quanties of hot water using recovered heat from any City Multi indoor units which are carrying out cooling operations or heat recovered from outside air at the City Multi outdoor unit.
As all buildings require some hot water for toilets, rest rooms & kitchens it becomes relatively easy to include a Mitsubishi heat pump boiler to care for the domestic hot water requirements of the building.
The heat pump boiler is installed with refrigeration pipework & electrical power supply the same as any Mitsubishi indoor unit. The plumbing engineer then installs the flow & return tubes to the hot water cylinder in the same way as connecting any boiler flow & return.
The heat pump boiler is controlled with a PARW21MAA remote controller so that the required primary return water temperature is maintained.
Alternatively the heat pump boiler can be used to provide hot water for other requirments such as underfloor heating or traditional radiators.
Example shown in the picture was commissioned as part of a standard City Multi installation. PWFY-P100VM-E-BU
Input less than 12 amps / 2.8kw.
Output 12.5kw.
Water Flow temperature 70 to 85 deg C dependant on application.
This unit warmed up water in both cylinders & a pumped secondary circuit which provided hot water to a number of toilets, kitchen & staff rooms.
From cold at 19 deg C the entire water cylinders & secondary system was up to 55 deg C in about 2 hrs.