Aqua-Hot 400 Series Service Manual page 87

6. Locate the heating zone circulation pumps. Reference
Figure G3.
7. Take the circulation pump's blue (negative) wire and
disconnect it from the connector of the opposing wire.
Be sure to purge both circulation heating loops simulta-
neously. Reference Figure G4.
8. Connect a jumper wire to the spade terminal on the
circulation pump's blue (negative) wire and clip the op-
posite end of the cable to a ground source.
NOTE: The circulation pump will activate as soon as the
pump is connected to a ground source.
9. Allow the circulation pumps to operate for the remain-
der of the purging process in order to purge all the air
out of the heating loops and boiler tank.
NOTE: Once the purging process has begun, it will be neces-
sary to refill the Aqua-Hot's boiler tank with the appropriate
antifreeze water heating solution.
Figure D-3
10. Open the drain valve and turn the fluid transfer pump
on and fill the Aqua-Hot with the 50/50 mixture of anti-
freeze and water heating solution until the Low Tank-
Level Cutoff Light on the electronic control board is ex-
tinguished. Reference Figure G2.
11. Turn the fluid transfer pump off and close the drain
valve.
12. Repeat steps 10 and 11 until all air has been complete-
ly bled from the entire heating system.
NOTE: All air is bled from the heating system when both
plumbing lines are free of air and there is fluid in the expan-
sion tank.
13. Continue to fill the Aqua-Hot heating system until the
fluid level remains at the "cold" mark on the expansion
tank bottle.
14. Once the systems have been purged, reconnect the
pump's wires as originally configured. Reference Figure
G4.
15. Ensure that each circulation pump's wiring has been
returned to its original configuration. Reference Figure
G4.
Pump 1 Pump 2
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Appendix D: Filling and Draining
Aqua-Hot
p.
87