Bard GV27S1-A, Руководство по установке

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Manual 2100-510E
Page 17 of 38
START UP PROCEDURE FOR GROUND
LOOP SYSTEM
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 airflow 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. Blowing
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 airflow 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 airflow
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.