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12.0 Pump Manual
Operating conditions:
1. Ambient temp: Max. + 40
C (104
F)
o
o
2. Liquid Temp: + 4
C (39
F) ~ + 40
C (104
F) Max.
o
o
o
o
3. System pressure: Max. 120 psi
4. Relative humidity: Max. 85% (RH)
Ensure the mains voltage is the same as the value shown on the motor plate and that the pump is
safely connected to ground.
Precautions:
1. The pump should be shut down and the trouble corrected if the pump is running at speed and
found to have any of the following problems:
No liquid discharged - Not enough liquid discharged – Excessive vibration – Motor runs hot.
2. Do not allow pump to continually start/stop (cycling). This will reduce motor life.
3. Cycling can occur on pressure units when pressure tank pre-charge drops or when there is a leak
in the discharge plumbing.
4. Pressure tank pre-charge should be checked at regular intervals of every 3 months and after
the pump has not been used for a prolonged period. To check the pressure tank air pressure turn
off power, open a tap on the discharge line to release pressure from the pump, unscrew the black
plastic cover and apply an accurate pressure gauge to the valve. Pressure should be adjusted to the
original pre-charge as follows: TQ400: 24 psi (1.7 Kg/cm2) - TQ800: 28 psi (2.0 Kg/cm2)
Maintenance:
Under normal operating conditions, the pump does not require any maintenance as long as the fol-
lowing points are observed:
1. Periodically check the condition of the check valve located under the red fill cap. Remove the
prime cover to check the condition of the check valve.
2. Periodically check the condition of the pump strainer located on the inlet of the pump. Remove
the two flange bolts from the suction pipe assembly to access the strainer.
3. If the pump sticks after periods of inactivity, a screwdriver slot is provided on the motor shaft end
to free up the pump/motor. To do so, insert a screwdriver in the slot in the motor shaft and turn to
free the rotor.
Adjusting the flow and pressure switch:
The pump is supplied with a preset pressure and flow switch. In some cases a different pressure or
flow may be required.
Flow switch: Remove the hex screw using a 5mm Allen key.
Insert a Phillips screw driver into the hole and turn clockwise. Make sure the system is primed.
Pressure switch: Remove three Phillips screws on the pump cover. Remove the cover. Insert a Phil-
lips screw driver on to screw on the pressure switch.
1. If pump does not start when priming faucet is open, adjust clockwise (+) until it starts.
2. If pump does not stop when priming faucet is closed, adjust counter-clockwise (-) until it stops.
3. After adjustment is made, open and close priming faucet several times to make sure the pump
operates normally.
+
-
Page 14
UG_RGW_v1.12_EN
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