Bard WPV48D, Руководство по установке

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Manual 2100-250
Page 15
4. Check system air flow for obstructions.
A. Move thermostat fan switch to ON. Blower runs.
B. Be sure all registers and grilles are open.
C. Move thermostat fan switch to AUTO. Blower should stop.
5. Fully open the manual inlet and outlet valves.
6. Check water flow.
A. Connect a water flow meter to the drain cock between the constant flow valve and the solenoid
valve. Run a hose from the flow meter to a drain or sink. Open the drain cock.
B. Check the water flow rate through constant flow valve to be sure it is the same as the unit is rated
for. (Example 4 GPM for a WPV30).
C. When water flow is okay, close drain cock and remove the water flow meter. The unit is now ready
to start.
7. Start the unit in cooling mode. By moving the thermostat switch to cool, fan should be set for
AUTO.
A. Check to see the solenoid valve opened.
8. Check the system refrigerant pressures against the cooling refrigerant pressure table in the installation
manual for rated water flow and entering water temperatures. If the refrigerant pressures do not match,
check for air flow problem then refrigeration system problem.
9. Switch the unit to the heat mode. By moving the thermostat switch to heat, fan should be set for AUTO.
A. Check to see the solenoid valve opened again.
10. Check the refrigerant system pressures against the heating refrigerant pressure table in installation
manual. Once again, if they do not match, check for air flow problems and then refrigeration system
problems.
NOTE: If a charge problem is determined (high or low):
A. Check for possible refrigerant loss.
B. Discharge all remaining refrigerant from unit.
C. Evacuate unit down to 29 inches of vacuum.
D. Recharge the unit with refrigerant by weight. This is the only way to insure a proper charge.
WATER CORROSION
Two concerns will immediately come to light when considering a water source heat pump, whether for ground
water or for a closed loop application: Will there be enough water? And, how will the water quality affect the
system?
Water quantity is an important consideration and one which is easily determined. The well driller must perform
a pump down test on the well according to methods described by the National Well Water Association. This
test, if performed correctly, will provide information on the rate of flow and on the capacity of the well. It is
important to consider the overall capacity of the well when thinking about a water source heat pump because
the heat pump may be required to run for extended periods of time.
The second concern, about water quality, is equally important. Generally speaking, if the water is not offensive
for drinking purposes, it should pose no problem for the heat pump. The well driller or local water softening
company can perform tests which will determine the chemical properties of the well water.
Water quality problems will show up in the heat pump in one or more of the following ways:
1. Decrease in water flow through the unit.
2. Decreased heat transfer of the water coil (entering to leaving water temperature difference is less).