Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
ranco water heating thermostat
Options

bill_8
Member Posts: 15
i have a hydro heat (PA) water to water GSHP with DHW. the DHW circulator runs 24/7. i have been happy with this unit but i have also been trying for the last 1.5 months to get any kind of answer from them on my question below.
i would like to put a setpoint controller (like the tekmar 150) on the DHW loop to turn on/off the DHW circuit.
from the schematic it shows the ranco WHT relay (C12) has C,NO,NC with a capillary tube in the DHW loop to sense temp. wiring is setup with C and NC that energizes a three way valve all the time until there is a call for DHW heat based on manual setting of ranco WHT (interesting enough you turn the therm counter clockwise to raise the temperature). best i can tell when there is a call for DHW heat the ranco WHT opens the relay thereby de-energizing the three way valve and the GSHP turns on and heats the DHW circuit . the setpoint must be set internally somehow. there are no wires on the NO terminal. the DHW circuit does take priority over heat.
my question. i pulled the wires off the ranco WHT and wired to a NC relay but that did not work. i am missing something on how the ranco WHT relay works. is the Com or NC post somehow grounded to the unit itself?
any insight appreciated. thanx in advance. bill
i would like to put a setpoint controller (like the tekmar 150) on the DHW loop to turn on/off the DHW circuit.
from the schematic it shows the ranco WHT relay (C12) has C,NO,NC with a capillary tube in the DHW loop to sense temp. wiring is setup with C and NC that energizes a three way valve all the time until there is a call for DHW heat based on manual setting of ranco WHT (interesting enough you turn the therm counter clockwise to raise the temperature). best i can tell when there is a call for DHW heat the ranco WHT opens the relay thereby de-energizing the three way valve and the GSHP turns on and heats the DHW circuit . the setpoint must be set internally somehow. there are no wires on the NO terminal. the DHW circuit does take priority over heat.
my question. i pulled the wires off the ranco WHT and wired to a NC relay but that did not work. i am missing something on how the ranco WHT relay works. is the Com or NC post somehow grounded to the unit itself?
any insight appreciated. thanx in advance. bill
0
This discussion has been closed.
Categories
- All Categories
- 87K THE MAIN WALL
- 3.2K A-C, Heat Pumps & Refrigeration
- 57 Biomass
- 425 Carbon Monoxide Awareness
- 114 Chimneys & Flues
- 2.1K Domestic Hot Water
- 5.7K Gas Heating
- 106 Geothermal
- 160 Indoor-Air Quality
- 3.6K Oil Heating
- 70 Pipe Deterioration
- 981 Plumbing
- 6.3K Radiant Heating
- 388 Solar
- 15.4K Strictly Steam
- 3.4K Thermostats and Controls
- 54 Water Quality
- 44 Industry Classes
- 48 Job Opportunities
- 18 Recall Announcements