Bard WPV48D, Руководство по установке

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Manual 2100-250
Page 12
SYSTEM START UP PROCEDURE
1. Be sure main power to the unit is OFF at disconnect.
2. Set thermostat system switch to OFF, fan switch to AUTO.
3. Move main power disconnect to ON. Except as required for safety while servicing, DO NOT
OPEN THE UNIT DISCONNECT SWITCH.
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. Flush, fill and pressurize the closed loop system as outlined in manual 2100-099.
6. Fully open the manual inlet and outlet valves. Start the loop pump module circulator(s) and check for
proper operation. If circulator(s) are not operating, turn off power and diagnose the problem.
7. Check fluid flow using a direct reading flow meter or a single water pressure gauge, measure the
pressure drop at the pressure-temperature plugs across the water coil. Compare the measurement
with flow versus pressure drop table to determine the actual flow rate. If the flow rate is too low,
recheck the selection of the loop pump module model for sufficient capacity. If the module selection is
correct, there is probably trapped air or a restriction in the piping circuit.
8. Start the unit in cooling mode. By moving the thermostat switch to cool, fan should be set for AUTO.
9. 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.
10. Switch the unit to the heating mode. By moving the thermostat switch to heat, fan should be set for
AUTO.
11. 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 leaks.
B. Recover all remaining refrigerant from unit and repair leak.
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.