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© 2008 Aqua-Hot
®
375-D Hydronic Heating System Installation Manual Rev. A
Room Thermostat Locations:
Select a location that will ensure even-heat throughout
each heating zone.
Locate each thermostat at approximately chest level, if
applicable.
NOTE:
The selected location should prevent the thermostat
from being affected by:
• drafts or dead spots behind doors and in corners
• hot or cold air from ducts
• radiant heat from the sun or appliances
• heat from concealed pipes and chimneys
• unheated or uncooled areas such as an outside
wall behind the thermostat
Room Thermostat Mounting:
Once the room thermostat has been wired, permanent-
ly mount the thermostat in place.
Be sure to then turn
OFF
both interior room thermo-
stats.
section 4: thermostats
Room Thermostat Wiring:
1.
Run one 18-gauge wire from each room thermostat
mounting location to the Aqua-Hot terminal block.
2.
Attach the zone 1 thermostat wire to the T1 location
on the terminal block and attach the zone 2 thermostat
wire to the T2 location. Reference Figure 28.
3.
Attach the T1 wire to the positive side of the zone 1
thermostat and attach the T2 wire to the positive side
of the zone 2 thermostat.
4.
Connect a wire from the negative sides of both ther-
mostats to the chassis ground.
Figure 28
Zone 1 thermostat Positive Connection
Zone 2 thermostat Positive Connection
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...