WARNING -THISAPPLIANCE MUST BE EARTHED
1. GENERALINFORMATION
1.1 Warm, humid, stale indoor air flows through the heat recovery unit before being discharged to the outside. Cold incoming
fresh air is heated by passing through the heat recovery unit before distribution to the various areas via ducting. The unit
is controlled by a fan speed controller which varies the rates of extract of stale air, and the supply of fresh air.
1.2 Care must be taken to ensure that any flue gasses from fuel burning equipment are not drawn into occupied areas.
1.3 If any area where air is extracted contains a fuel burning appliance, such as a central heating boiler, then either:
Its flue must be of the room sealed or balanced flue type, or
Allowance must be made for an adequate supply of air into the area.
Fig. 1
HR600 Heat Recovery Unit
2. OPERATION
2.1 Turn on the electrical supply to the appliance.
2.2 Set the ‘MAINS’ switch to ‘ON’, ‘FAN SPEED CONTROLS’to the position recommended by the installation engineer to
provide normal circulation.
2.3 To boost ventilation rates (i.e., to quickly expel foul air), set the ‘FAN SPEED CONTROLS’ clockwise to a setting which
provides the desired boost. When the boost is no longer required, reset the ‘FAN SPEED CONTROLS’ to their original
positions.
2.4 During periods when the premises are unoccupied, or when full circulation is not required, set the ‘FAN SPEED
CONTROLS’ to ‘1’ to conserve energy.
2.5 In warm weather, when heat recovery is not required, the ‘FAN 1 SPEED CONTROL’may be set to ‘OFF’, thus only
allowing the extract fan to operate, drawing fresh air in through open windows, etc.
2.6 To turn off the unit, set the ‘MAINS’ switch to ‘OFF’. 1
HR600 SUPPLY & EXTRACT
VENTILATION SYSTEM WITH HEAT RECOVERY
USER’S INSTRUCTIONS
Publication No. ZZ 853/3
August 1999
Cool fresh air
from outside
Cooled stale air
to outside
Condense
drains
Hot stale air
from inside
Warmed fresh
air to inside
