Specifications

FM774/0708 BOOK 2 5
SAFETY NOTES
Electrical & Rotary Machinery
• All electrical equipment should be isolated before work is performed. If ‘live testing’ is required all neces-
sary safety precautions should be followed.
Working at Heights
• When work is to be performed at heights all necessary safety precautions should be followed.
INSTALLATION NOTES
Motor & Fan
• A fan clipping two opposite points of the cowling indicates the dropper is ‘out of square’. Diagonal
dimensions of dropper must be equal, +/-5mm.
• Centralise the fan in the cowling by tightening the nearest 8mm motor mounting nut to the point of contact.
This will only achieve several millimetres of movement due to fan and cowling tolerances.
• When replacing a Roof Unit circuit board or fan motor a ‘minimum speed set-up’ should be preformed
to avoid damaging motors by operating below specified minimum RPM values.
• Fan blade pitch should not be altered from factory setting as significant changes in motor loading, airflow
and noise characteristics will result.
• The fan motor will not operate if the Motor Speed Key is not fitted to the keypad or MCU circuit board.
Plumbing
• Non-return type valves are not required as isolation valves in water supply. Back flow is not possible due
to physical air gap created by water inlet design. Using a non-return type valve may result in a pressure
lock between it and the solenoid valve due to water hammer or water expansion from heat.
• As of September 2002. All units except the ‘E’ series will be supplied with an isolation valve which
incorporates a filter/strainer. The filter can be cleaned during a routine maintenance. In installations where
copper water supply piping is connected directly to water inlet solenoid elbow a slight ‘humming’
or ‘buzzing’ may be heard. This can be eliminated by connecting a length of flexible water pipe, immedi-
ately before the solenoid elbow.
• Drainage pipe size, position and discharge location must all conform to local regulations.
Electrical
• All units should be powered from a dedicated circuit protected by a 10A or 15A re-wireable fuse or circuit
breaker, (Ref: AS3000, 2.4.2). A GPO or socket outlet is not required and therefore RCD protection is
not required. Flexible wiring can be joined to fixed wiring in a junction box, (Ref: AS3000, 3.7.2.7). Supply
ing a unit from an existing RCD protected power circuit may result in nuisance tripping of that device due to
the sum of leakage current from all appliances on that circuit.
• Damage to equipment can occur if power is not isolated when connecting or disconnecting keypads, or ap-
pliances from Roof Units or MCU’s.