AAON BL-600 - Manual (Page 45)

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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).