Instruction Manual

8
INSTRUCTIONS CONT.
IX. 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 the pump to continually start and stop (cycling) as this will reduce the motor life.
3. Cycling can occur on pressure units when the pressure tank pre-charge drops, or where there
is a leak in the discharge plumbing.
X. Operation and maintenance
Under normal operating conditions, the pump does not require any maintenance as long as the
following points are observed:
1. Periodically check the condition of the check valve and strainer (if used).
2. If the pump is to be inactive for long periods, it should be rinsed thoroughly with clean water,
then, drained and stored in a dry place.
It has to be re-primed before start-up.
3. If the pump shaft is seized up after periods of inactivity, please place a screw driver from the
motor end to rotate the shaft. It should free the pump shaft. ( See Fig 9 ) If this does not remedy
the problem, the unit will need dismantling.
4. Pressure tank air charge should be checked at regular intervals of every 6 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 as shown in Fig 10.
Pressure should be adjusted to the original pre-charge as follows:
TQ200: 20 psi (1.4 Kg/cm²)
TQ400: 28 psi (2.0 Kg/cm²)
TQ800: 36 psi (2.5 Kg/cm²)
TQ1500 up to TQ3700: 43 psi (3.0 Kg/cm²)
Fig. 9
Fig. 10
VII. CYCLING
VIII. MAINTAINANCE
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 the pump to continually start and stop (cycling) as this will reduce the motor life.
3. Cycling can occur on pressure units when the pressure tank pre-charge drops, or where there is
a leak in the discharge plumbing.
•
•
• DDP-20: 20psi (1.4 Kg/cm
2
)
Fig. 9Fig. 9
Fig. 10Fig. 10
Under normal operating conditions, the pump does not require any maintenance as long as the
following points are observed.
1. Periodically check the condition of the check valve and strainer (if used).
2. If the pump is to be inactive for long periods, it should be rinsed thoroughly with clean water,
then, drained and stored in a dry place. (It has to be pre-primed before start-up).
3. If the pump shaft is seized up after periods of inactivity, please place a screw driver from the motor end to
rotate the shaft. It should free the pump shaft. (See Fig. 9) If this does not remedy the problem,
the unit will need dismantling.
4. Pressure Tank air charge should be checked at regular intervals of every 6 months and after the pump has
not been used for a prolonged period. To check the Pressure Tank air pressure, turn o the power, open a
tap on the discharge line to release pressure from the pump, unscrew the black plastic cover and apply an
accurate pressure guage to the valve as shown in Fig. 10.
Pressure should be adjusted to the original pre-charge as follows:
IX. 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 the pump to continually start and stop (cycling) as this will reduce the motor life.
3. Cycling can occur on pressure units when the pressure tank pre-charge drops, or where there
is a leak in the discharge plumbing.
X. Operation and maintenance
Under normal operating conditions, the pump does not require any maintenance as long as the
following points are observed:
1. Periodically check the condition of the check valve and strainer (if used).
2. If the pump is to be inactive for long periods, it should be rinsed thoroughly with clean water,
then, drained and stored in a dry place.
It has to be re-primed before start-up.
3. If the pump shaft is seized up after periods of inactivity, please place a screw driver from the
motor end to rotate the shaft. It should free the pump shaft. ( See Fig 9 ) If this does not remedy
the problem, the unit will need dismantling.
4. Pressure tank air charge should be checked at regular intervals of every 6 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 as shown in Fig 10.
Pressure should be adjusted to the original pre-charge as follows:
TQ200: 20 psi (1.4 Kg/cm²)
TQ400: 28 psi (2.0 Kg/cm²)
TQ800: 36 psi (2.5 Kg/cm²)
TQ1500 up to TQ3700: 43 psi (3.0 Kg/cm²)
Fig. 9
Fig. 10