Leslie Controls NYC Heat Exchanger Supplement - Manual (Page 7)

Page 7 of 9
1. Insure all connection are made and unit is running
at specified maximum flow.
2. Turn off supply of water to one side. Half of
specified maximum flow is now being delivered.
3. Check outlet water temperature and insure it is
120 degrees F.
4. If warmer then turn gain valve handle
counterclockwise for ¼ turn.
5. Recheck water temperature and repeat until
reaching desired temperature.
6. Note: Temperature will not change quickly and
must be left to seek it’s normal setting.
7. If the water was colder then turn the gain valve
handle clockwise for ¼ turn.
8. Recheck water temperature and repeat until
reaching desired temperature.
9. Turn back on the supply of water to side turned
off. Wait for the system to stabilize.
10. Repeat step 2 through 9 for the second side.
FINAL CHECK
A. RESET
1.
After full unit has reached temperature and has
been working for 5 minutes, push H1 switch in
control box to off position.
2. No. 1 Heater light will come on, just as it will in
an over temperature condition.
3. Check that pipe after solenoid for side one cools.
If not then repeat for side two. If both sides do
not shut off then, see wiring diagram and
diagnose electrical connections.
4. Turn H1 switch back on.
5. No. 1 Heater light will go off.
6. Check that pipe after solenoid for side one gets
warm. If not change solenoids seat.
7. Repeat for side two.
8. Turn off H1 and H2.
9. Reset light goes on, No pump flow light goes on,
No. 1 heater over temp light and No. 2 heater over
temp light go on.
10. Look to see if condensate ball valve actuator is
moving to divert the condensate around cooler.
11. If condensate ball valve actuator is not moving
then see wiring diagram and diagnose electrical
connections.
12. Turn both H1 and H2 switches on.
13. Reset light will stay on until the condensate ball
valve actuator has returned to is normal condition
and flows condensate through the cooler.
14. No pump-flow light will go out. If pump one light
is on then check that pump one is turning. If
pump two light is on then check that pump two is
turning. If either pump is turning, and NO flow
light is on then bleed input and output pressure
lines to differential pressure switch to insure that
there is no air in piping. If this does not work then
adjust differential pressure switch.