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Firemiks AB
Instruction manual version: SPFA FM
P.O. Box 8155, 104 20 STOCKHOLM, Sweden
phone +46-8-551 196 10 - [email protected] - www.firemiks.com
Conv. thermal current: Ithe 10 A AC / 2,5 A DC
Rated operational voltage: Ue 240 V AC; 250 V DC
Utilization category: AC-15, Ue/Ie 240 V / 3 A; DC-13, Ue/Ie 250 V / 0,27 A
Direct opening action: acc. to IEC/EN 60947-5-1, Annex K
Short-circuit protective device: Fuse 6 A gG
Protection class: II, totally insulated
Enclosure and cover: Thermoplastic, glass fibre reinforced UL 94-V0 IP65
4.7.2 Automated selector valve
The end user, if necessary for the installation, may automate the
selector valve Dosing/Flushing (No. 4 on Flow chart). When
automating the existing three-way valve, whatever the chosen method
of automation, make sure that the actuator is fast and able to make a
switch under one second. Otherwise, if the selector valve is left
between its two end positions, the valve may be open for both flushing
and dosing and thus pressurized flushing water can enter the suction
line and pollute or even overflow the concentrate tank.
If the chosen actuator works slowly leaving the valves open for some
time between its two end positions, an alternative is to install a check
valve to avoid the risk for pressurized water to enter the concentrate
tank. This check valve should then be of the swing type / flapper type,
not spring loaded. Make sure it works properly and does not interfere
with gravity feed.
4.7.3 Manual air relief valve
This valve needs only to be opened when the concentrate liquid is
filled into the Firemiks system for the first time to ensure that all air is
let out of the concentrate feed and dosing line, otherwise it should
remain closed.
4.7.4 Drain Valve
All units except the smallest FM 300 and 400 size are equipped with a
drain valve. This valve is used to drain the unit from water for
maintenance or storage. The unit must be completely drained from
water if it is to be stored in freezing conditions. It must be closed in
regular operation.