28
GLYCOL AUTO FILL UNIT cont.
The Ultra versions of the GLA have the
capability of controlling duty and standby pumps
from a single pressure switch.
GLA Ultra Settings:
The extra functionality of Ultra units is integral.
The only selectable option is Manual or
Automatic reset of alarm conditions. DIP switch
1, on the display board should be set to OFF for
auto reset (Factory setting), and ON for manual
reset. On alarm conditions, the MUTE switch
will mute the buzzer. In manual reset mode this
MUTE switch will reset the alarms after the fault
condition has been cleared. Other switches
change the mode of the printed circuit board for
use with other products. For GLA application, all
switches except 1 and 7 must be set to OFF.
Priming the make-up pumps:
1.
Close suction isolating valve.
2.
Fill the glycol-mixing tank.
3.
Remove the upper vent plug from the make-up
pump.
4.
Open suction isolation valve until water flows
out of this tapping.
5.
Close valve and replace plug.
6.
Repeat for standby pump (where fitted).
7.
Close the system-isolating valve.
8.
Open suction isolating valve.
9.
Switch on unit, initially both pumps will run.
As the pressure reaches the pump control switch
threshold, the pumps will switch off.
10.
Check all piping for leaks following
shipping.
11.
Crack open system valve. The pressure will
fall and the pump will start and maintain
pressure.
Powered agitation (Ultra model only):
A solenoid valve is fitted to provide powered
agitation of the mixture. Automatically this valve
is periodically opened and the duty pump starts
creating circulation through the pump and
mixing tank. Automatic mixing is inhibited when
there is a system demand for make-up.
A switch is provided for manual agitation when
adding glycol to the mixing tank.
Topping up with glycol:
The mixing tank is calibrated in liters and US
gallons. The normal top up level is 53 US gallons
(200 liters).
1.
Calculate the amount of water needed and add
or drain to the correct level.
2.
Add the required amount of glycol.
3.
Operate the manual-agitating switch.
4.
Check the mixture percentage.
The unit is now ready for service.
FLO-TREX COMBINATION VALVE
Introduction:
The Flo-Trex combination valves are designed
for installation on the discharge side of
centrifugal pumps, and incorporate three
functions in one valve:
1.
Drip-tight shut-off valve
2.
Spring closure design, Non-slam check valve
3.
Flow throttling valve
Armgrip Flange Adapter installation:
1.
Position the two halves of the Armgrip flange
adapter on the valve body ensuring that the lugs
on each half of the flange adapters are located
between the anti-rotation lugs on the valve body
(as shown).
Insert two bolts of specified size (Table A1) to
secure the halves of the flange adapter to the
valve body (as shown).
