19
6.
All pressure and flow adjustments must be made with the discharge valve;
never use a valve on the suction side of the pump for this purpose.
7.
Do not operate near shutoff (low flow) without a bypass.
8.
Do not operate pump with suction valve closed – this will cause damage and is
dangerous.
G. SHUTDOWN
1.
Close discharge valve. (Prevents reversal or continuation of flow after shutoff.)
2.
Stop pump.
3.
Close valves to prevent flow through by-pass, if applicable.
4.
If pump is to remain out of service more than 2 weeks, follow the storage
instructions in section I E. “Storage Instructions”.
WARNING
TO PREVENT PUMP FROM FREEZING DURING COLD WEATHER THE LIQUID
IN THE ROTOR ASSEMBLY MUST BE DRAINED. FAILURE TO REMOVE THE
LIQUID DURING FREEZING TEMPERATURES COULD RESULT IN SEVERE
DAMAGE TO THE PUMP.
5.
For long-term pump storage in cold temperatures drain the liquid in the rotor
assembly by doing the following:
5.1
Remove the ¾ NPT pipe plug in the endbell.
5.2
Rotate the pump until one of the rotor cover drain plugs lines up with the
¾ NPT hole in the endbell.
5.3
Remove the rotor cover drain plug and allow the liquid to completely
drain out.
5.4
Inspect and replace if necessary the o-ring on the rotor cover drain plug.
5.5
Reinstall the rotor cover drain plug in the rotor cover. Torque to 13 ft.
lbs. (18 N.M.).
5.6
Reinstall the 3/4 NPT plug in the endbell.
