Aqua-Hot 375-LP, Руководство по установке

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© 2011 Aqua - Hot
®
375 - LP Installation Manual
of the Aqua-Hot.
8. Close the drain valve.
Purging the System by Grounding the Zone
Thermostat Connection:
1. Ensure that the boiler tank has been filled with
the appropriate mixture of antifreeze and water
heating solution.
2. Locate fuse block. Connect jumper-wire with
alligator clips to wire #23 at the fuse block and
wire 24 at the relay #1.
3. Locate Terminal Block for switches, heat ex-
changers, fans and thermostats. Reference Fig-
ure 51.
4. Locate the thermostat connection terminals T1
and T2. Reference Figure 52.
5. Connect a wire to the desired zone terminal and
connect the opposite end of the cable to a
ground source. Reference Figure 52.
6. Allow the circulation pump to operate for ap-
proximately 1-3 minutes in order to purge the
corresponding heating loop, then remove the
wire from the ground source.
7. Open the drain valve and completely fill the Aq-
ua- Hot’s boiler tank with additional antifreeze
and water heating solution.
8. Repeat steps 5 and 6 for both heating loops until
all air has been completely bled from the entire
heating system
.
9. Once the systems have been purged, disconnect
the wire from the ground source and the termi-
nal block.
S
ECTION
10: P
URGING THE
S
YSTEMS
— Page 42 —
1. Refer to the information and chart in Appendix
E and determine the level of protection required
for your operating conditions.
2. Mix propylene glycol based antifreeze and water
to meet the level of protection you require.
3. Measure the level of propylene glycol in the anti-
freeze solution to ensure it is mixed to the prop-
er level of protection.
4. Open the Aqua- Hot’s drain valve located at the
front of the heater. Reference Figure 50.
5. Connect a piece of 1/2 inch PEX-type tubing to
the drain valve. This piece should be long
enough to transport the antifreeze and water
heating solution from its source to the Aqua-
Hot.
6. Fill the Aqua-Hot completely with the proper
mixture of antifreeze solution. This will take
approximately five gallons; look for the solution
to enter the overflow tube attached to the ex-
pansion tank connection on top of the Aqua-
Hot.
7. When refilling, open the air-release valve located
on the expansion tank connection to release air
pockets. Reference Figure 47. Hold the valve
open until all air is released. Be sure the valve is
closed when finished by hand-tightening. Look
for the solution to enter the overflow tube at-
tached to the expansion tank connection on top
8.
NOTE: All air is bled from the heating system when the
antifreeze solution enters the overflow tube at-
tached to the expansion tank connection.
NOTE: The circulation pump will activate as soon as the
terminal is connected to a ground source; there-
fore, disconnect the wire from the ground source
during the antifreeze and water heating solution
filling procedure.
CAUTION
Propylene glycol based antifreeze solution is not 100%
propylene glycol. Some propylene glycol based antifreeze
solution is premixed with water.
NOTE: See Appendix D for water quality recommenda-
tions and Appendix E Antifreeze mixture infor-
mation and ratios.
Purging the Hydronic Heating System (Continued):
NOTE: Use a refractometer to properly measure the per-
cent of propylene glycol in the antifreeze solu-
tion. Ball
- type hydrometers typically used for
measuring the percentage of ethylene glycol in
automotive applications will not properly meas-
ure the level of propylene glycol. See Appendix
F on Page 52.