Start Up Procedure For Closed Loop System - Bard Q-TEC Series Literature Assembly

START UP PROCEDURE FOR CLOSED
LOOP SYSTEM
1. Be sure main power to the unit is OFF at
disconnect.
2. Set thermostat system switch to OFF and 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. 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,
Thermometer
Dial face pressure guage
with guage adaptor
60
50 70
40 80
30 90
20 100
10 110
0 120
Manual 2100-738A
Page 52 of 71
8. Start the unit in cooling mode by moving the
9. Check the system refrigerant pressures against the
10. Switch the unit to the heating mode by moving the
11. Check the refrigerant system pressures against the
NOTE
FIGURE 32
Water Temperature and Pressure Procedure
Barbed 90° adapter
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.
thermostat switch to cool. Fan should be set for
AUTO.
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.
thermostat switch to heat. Fan should be set for
AUTO.
heating refrigerant pressure table in installation
manual. Once again, if they do not match, check
for airflow problems and then refrigeration system
problems.
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 ensure a proper charge.
NOTE: Slide retaining cap back to expose
double o-rings. Apply petroleum jelly to o-rings
to prevent damage and aid in insertion
Retaining cap, hand tighten only
Pete's test plug
Test plug cap
MIS-2622 A