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© 2008 Aqua-Hot
®
375-D Hydronic Heating System Installation Manual Rev. A
2.
Once the thermostat has been completely wired,
permanently mount the thermostat in place. Reference
Figure 26.
Fresh Water Tank Thermostat Wiring:
1.
Run two 18-gauge wires from the terminal block (posi-
tions T3 and P2) to the fresh-water tank thermostat.
2.
Splice the wire from position T3 on the Aqua-Hot’s ter-
minal block to the fresh water tank thermostat’s black
wire.
3.
Run an 18-gauge wire from the positive (red) wire on
the fresh water bay heat exchanger to the fresh water
tank thermostat.
4.
Both the wire from the P2 position on the Aqua-Hot’s
terminal block and the wire connected to the positive
wire on the fresh water tank bay heat exchanger will
need to be connected to the fresh water tank thermo-
stat’s blue wire.
section 4: thermostats
Fresh Water Tank Thermostat Locations:
Select a location that will ensure even-heat distribution
throughout the fresh water storage tank bay com-
partment in order to prevent the domestic water and
plumbing system from freezing.
Typically only the bulb of the thermostat needs to be
physically mounted in the area requiring heat (usually in
close proximity to the domestic water pump). Refer-
ence Figure 26.
Do not mount the thermostat bulb in a drafty area.
The selected mounting location should allow for easy
operator access.
Avoid mounting the fresh water tank thermostat’s bulb
too close to the bay heat exchanger.
Fresh Water Tank Thermostat Mounting:
1.
Select a location for the thermostat bulb in the fresh
water storage tank bay compartment.
Black wire to T3
position on
Terminal Block
Blue wire spliced to (+)
Heat Exchanger wire
Blue wire spliced
to P2 position on
Terminal Block
Fresh Water Tank Thermostat
Terminal Block
Heat Exchanger
Figure 27
Figure 26
6
0 1 0
2 0
3 0
0
0
F
Bulb
Mounting
Tabs
Black Wire
Blue Wire
Summary of Contents for 375D
Page 1: ...2008 Aqua Hot Heating Systems Inc Installation Manual...
Page 38: ...Wiring Diagram Appendix A...
Page 40: ...Wire Gauge Information Appendix B...
Page 42: ...Antifreeze Types Appendix C...
Page 44: ...Antifreeze Mixture Water Quality Recommendations Appendix D...
Page 46: ...Antifreeze Terms and Mixture Ratio Appendix E...