3
11 - Timer Models
13
14
+
-
3
25mins
B.
WIRING.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
THE ACM FANS ARE DOUBLE INSULATED AND CARRY A MARK. THERE ARE NO EARTH TERMINALS
AND THESE FANS MUST NOT BE EARTHED.
1. Remove terminal box cover & screws and put to one side Fig. 9
2. Select and follow the appropriate wiring diagram (Fig. 10-11).
3. Check all connections have been made correctly and ensure all terminal connections and cable clamps are
securely fastened.
4. The cable entry must be made using the cable grommet provided
5. Replace terminal box cover & screws Fig.12
6. Ensure the impeller rotates and is free from obstructions Fig 13
N.B:- The Timer fans are factory set for high speed operation in terminal
LA
for low speed operation the blue wire in the
LA
terminal needs to be moved into terminal
LB
(Timer models are not speed controllable)
Timer Adjustment.
Two speed with adjustable overrun timer (Factory set
at high speed LA). The fan must be wired to a remote
switch (e.g. light switch). When switched ‘ON’, the
fan will operate at the selected speed, and will
continue to run for a preset time after the fan is
switched ‘OFF’. The timer is factory set at 15 minutes
approx The overrun time period can be adjusted from
3-25 minutes by altering the adjuster on the control
PCB. Fig 14.
Before adjusting the timer, switch off the Mains Supply.
Remove the fan terminal box cover and retain screws
To REDUCE the operating time, turn the adjuster
CLOCKWISE
.
To INCREASE the operating time, turn the adjuster
ANTI-CLOCKWISE
. Replace the fan terminal box cover.
~
N
L
1 Phase Supply
(220-240V 50Hz).
FUSE
L
LA
Fan
LB
3A
LS
N
REMOTE SWITCH
9
~
N
L
1 Phase Supply
(220-240V 50Hz).
FUSE
N
LA
Fan
LB
3A
10 - Basic Models
For high speed operation wire into terminal
LA
for low speed wire into
LB
N.B. If fan is used in conjunction with a Vent-Axia speed controller
the
LA
(High Speed) terminal
MUST
be used.
12