Taco relay
taco 503 relay not operating all zones
Comments
-
-
Metal or plastic cover? Like Ed asked, green LED on? Do you have voltage at NH coming in? Are the fuses good?
What if you jump the t-stat wires on the control, does that bring the zone on?
Please give Taco Technical Support a call Mon-Fri 8am-5PM EST 401-942-8000 and just ask for Tech Support.
0 -
It's an SR503-4, I guess. Which zone is inoperative? What kind of thermostats? Does the corresponding led lite when the thermostat calls for heat?
Check and make sure that all the screws to wiring are tight (turn off power when doing this). If it is the priority zone, move the priority switch off and on several times. If you don't need priority leave the switch in the off position. Take a closed end wrench and tap the relay lightly on the inoperative zones (does that help?).
You can get a cheap digital volt meter at Harbor Freight or Home Depot and set it at 120V ac setting and check each N-H screw for each zone pump connection and see if the meter reading is 120 Volts. The thermostat for that zone must be set above room temperature and the corresponding led is lit.
That would be a start.
I guess it would be prudent to ask why you think , the "taco 503 relay not operating all zones".
0
Categories
- All Categories
- 86K THE MAIN WALL
- 3.1K A-C, Heat Pumps & Refrigeration
- 52 Biomass
- 421 Carbon Monoxide Awareness
- 81 Chimneys & Flues
- 1.9K Domestic Hot Water
- 5.3K Gas Heating
- 96 Geothermal
- 154 Indoor-Air Quality
- 3.3K Oil Heating
- 60 Pipe Deterioration
- 893 Plumbing
- 5.9K Radiant Heating
- 379 Solar
- 14.7K Strictly Steam
- 3.2K Thermostats and Controls
- 52 Water Quality
- 41 Industry Classes
- 47 Job Opportunities
- 17 Recall Announcements