Ritetemp and Trol – a- Temp wiring Question
I have a 3 zone forced air system. The heat works as it should. Each zone works independently as it should. With the heat there is no issue at all. I have each zone wired as below with the exception of jumping RH to RC. In the winter I do not have this jumper in place for heat use. With the air conditioning there is a problem. The problem is that I have to turn on the AC by using the master thermostat. Neither of the secondary thermostats have any affect when used. When I call for AC with the Master Thermostat it comes on as it should however it blows through all 3 zones. The secondary thermostats do not work to turn on or off the AC unit outside, nor do they open or close the air dampers to their respective zones. So if I want AC I have to cool my whole house rather than just one zone. I have the jumpers from RH to RC in place simply because it is necessary to have RC activated to run the AC. I have jumped RH to RC on all 3 thermostats as well as only on the master. This makes no difference in function. As long as the RC is jumped from RH or directly hooked to the white wire it functions as described above. Additionally all thermostats are set to cool and auto fan. ( I have tried every combination of settings, but am open to trying anything). All I want is for the AC to work correctly and independently like the heat does in each zone. Any suggestions are greatly appreciated. Below are the wirings I have on each thermostat as well as the wiring on the control panel at the furnace. All thermostats are Ritetemp 511 programmable model 8022. and Control panel at furnace is Trol - a- Temp Model MABS II. Master thermostat: RH = White - RH is also jumped to RC W = Blue Y = Red G = Green B = Brown O = Yellow Secondary thermostat family room: RH = Blue - RH is also jumped to RC W = White Y = Red G = open B = open O = open A= open C = open Secondary Thermostat Upstairs: RH = Blue - RH is also jumped to RC W = White Y = Red G = open B = open O = open A= open C = open CONTROL UNIT AT FURNACE Trol - a- Temp Model MABS II Y2 - open Y1 - red O - open G2 - open G1- red RC - red RH - red B- open W2 - open W1- white E - open Change over control: Cool (O1) = yellow (labeled 'control') Fan (G1) = Green (labeled 'control') Heat (B1) = Red (not from same group of wires that is labeled ' control') Emergency heat (E1) = open 24 v. 40.v.a. (2) = Red (not from same group of wires that is labeled ' control') Transformer (1) = White (not from same group of wires that is labeled ' control') Zone 1: In O position ( choice for switch is 'O' or 'C') T8 = open T7 = open T6 = Red (labeled 'control') T5 = White (labeled 'control') T4= Blue (labeled 'control') M6= Blue M4= White M1=Red Zone 2: In O position ( choice for switch is 'O' or 'C') T8 = open T7 = open T6 = Red T5 = White T4= Blue M6= Blue M4= White M1=Red Zone 3: In O position ( choice for switch is 'O' or 'C') T8 = open T7 = open T6 = Red T5 = White T4= Blue M6= Blue M4= White M1=Red Thanks in advance for any and all help. Damon http://customer.honeywell.com/techli...0s/68-0101.pdf Just coloring in the diagram as you have posted, it looks like zone 2 and zone 3 stats are wired incorrectly. You have blue and white crossed. W = blue, R = white, and Y = red. Houston, It still is not working correctly. I tried switching the blue and white wires on stats as you suggested, but this made no difference. the secondary stats still will not control damper / acuators or turn on /off the AC unit out side. the problem still exists as originally described. Any other suggestions? Thanks again! Damon Zone 1 stat controls the system mode. Turn off all stats (mode off, fan off) and measure G to 1 and G to 2 at the changeover control (zone 1 stat connections to control board). The (1-G, 2-G) combination that did not show 24VAC will determine C (common). I'd guess terminal 2 is C but this should be proven. Measure O to C with zone 1 stat in cool mode but no demand. (We want 24VAC) Measure zone2 T6 to C when zone 1 is in cool mode but has no demand (cool 85) and zone 2 has a cool demand (cool 65). (We want 24VAC) Is this a twenty year old zone control board? I'm off to work. Be back in 12 hours... Houston, Ok. I performed the tests you requested in two ways. First way with my original wiring on the stats and then I performed the tests again with your wiring suggestion of switching the blue and white wires. And YES this is approximatelty 20 years old (house built in 1992 and this is original to the house as far as I know)Here are the results of the tests: With Houston's suggested wiring: All stats OFF (mode off, fan auto -only chioice is on or auto) and measured G to 1 and G to 2 at the changeover control RESULT - G to 1 = 0 volts and G to 2 = 24 Volts The (1-G, 2-G) combination that did not show 24VAC will determine C (common). RESULT - G to 1 is the Common Measure O to C with zone 1 stat in cool mode but no demand. (We want 24VAC)RESULT - 01 to C = 0 volts (01 is labeled cool on change over control) OR 0 to C =24 volts (0 in this case is from the far left on your diagram underthe y1 where compressor contractor is attached) Measure zone2 T6 to C when zone 1 is in cool mode but has no demand (cool 85) and zone 2 has a cool demand (cool 65). (We want 24VAC) RESULT - This test shows 0 volts. So not what you were hoping for, but I hope that it tells us something..... Now I also tried these exact same tests with my original wiring with all of the same results except for one ------ Measure O to C with zone 1 stat in cool mode but no demand. (We want 24VAC) in this case with my original wiring RESULTS - 01 to C = 24 volts (01 is labeled cool on change over control) all other results were indenticle to the above. Ok I am hoping that this gives us something to go on because I am at a loss. Thanks again! Damon Oh it is 95 degrees today too....... Any help would be great!!!!! Damon Ok I just retested to be sure and came up with the results below they vary slightly from the first testing and I believe this one is the correct and accurate test results. I am using Houston's wiring suggestions. All stats OFF (mode off, fan auto -only chioice is on or auto) and measured G to 1 and G to 2 at the changeover control RESULT - G to 1 = 0 volts and G to 2 = 24 Volts The (1-G, 2-G) combination that did not show 24VAC will determine C (common). RESULT - G to 1 is the Common Measure O to C with zone 1 stat in cool mode but no demand. (We want 24VAC)RESULT - 01 to C = 24 volts (01 is labeled cool on change over control) OR 0 to C = 0 volts (0 in this case is from the far left on your diagram underthe y1 where compressor contractor is attached) Measure zone2 T6 to C when zone 1 is in cool mode but has no demand (cool 85) and zone 2 has a cool demand (cool 65). (We want 24VAC) RESULT - This test shows 0 volts. So not what you were hoping for, but I hope that it tells us something..... Damon O1 to C is the test that I wanted. 24VAC is a good reading. 0 VAC between T6 and C means no cooling demand from stat. Do we have 24 VAC between zone 2 (T5 to C) indicating that we are supplying 24 VAC to the stat. Zone 2 3 stat functions: R = 24 VAC Y = cooling W = heating Zone 2 T5 to C = 0 volts (tested with master on and calling for cool, zone 2 on but not calling for cool)... If its not getting the voltage what do I do? is there a way to jump it or something? Damon Page 22 in your manual speaks of ... ONE ZONE COOLING: ON - Disables zone control in cooling. OFF - Allows zone control in cooling. Houston, YOU DID IT!!!!!!! That was it, The switch. Thank you so much for your help. I hope I will be able to help someone else in return. This heating and cooling system has been a pain since the day I bought the house and this was the very last thing I needed to sort out as far as the heating and cooling goes........This fix has been years in the making. Thanks again!!!!! Damon That's great news. I'm happy to have helped.Beer 4U2
Related Posts:
Wiring a 2 wire thermostat
Wiring a 2 Wire ThermostatI am trying to wire my New Honeywell programmable thermostat. The existing Thermostat uses only 2 wires (for heating and cooling). The switches for Fan operation and Heat...
White rodgers zone valve wiring
White Rodgers zone valve wiringI'm replacing a basic round Honeywell HEATING ONLY t'stat (without any switches) for a hot water system with a programmable digital to save energy. The White Rogers...
Trane heat pump tstat replacement with honeywell prog wiring question
Trane Heat Pump tstat replacement with Honeywell prog - wiring questionI want to replace my Trane Weathertron tstat with a Honeywell RTH7400 prog one. I have a Trane heat pump with aux heat. I've...
Wiring zone valves
wiring zone valvesHi: Have replaced old cast iron with pex. Kept cast iron radiators (hot water) on first floor. Second floor used fin and tube. Created 2 zones. Original thermostat is two wire, h...
Wiring diagram for carrier gas furnace 58stastx
wiring diagram for carrier gas furnace 58STA/STXI am brand new to this site and not sure exactly where to post my question. This would be the proper forum: http://www.doityourself.com/forum/gas-oi...
