HRV interlocking with Furnace

[joshimh]

I need help with interlocking HRV to furnace so that when HRV runs, furnace blower should run. I have done the wiring as HRV manufacturers say on page # 18 of the attached link, but no luck so far. I have an issue with two installations that we have done in past 2 days. Contacted manufacturer, they advice that HRV board may be faulty but since we have an issue with 2 units, I do not think that HRV board is an issue.

HRV : Nu-Air ES100
HRV Controller : ES-M2
Thermostat : Honeywell Pro3000
Furnace : Keeprite N9MP1 Hi Eff

http://service.clearservice.com/nuair/campaignimages/1/website/pdf/es_man37.pdf
http://www.nu-airventilation.com/products/hrv_residential/

As per the Nu-Air instruction, I have connected:
- G from furnace board to i2 on HRV
- I1 from HRV to G on Thermostat
- C from furnace board to C on HRV
- I have changed the jumper on HRV so that any speed HRV runs it should interlock with furnace

Help will be appreciated,
Thanks,
Josh

[second opinion]

I need help with interlocking HRV to furnace so that when HRV runs, furnace blower should run. I have done the wiring as HRV manufacturers say on page # 18 of the attached link, but no luck so far. I have an issue with two installations that we have done in past 2 days. Contacted manufacturer, they advice that HRV board may be faulty but since we have an issue with 2 units, I do not think that HRV board is an issue.

HRV : Nu-Air ES100
HRV Controller : ES-M2
Thermostat : Honeywell Pro3000
Furnace : Keeprite N9MP1 Hi Eff

http://service.clearservice.com/nuair/campaignimages/1/website/pdf/es_man37.pdf
http://www.nu-airventilation.com/products/hrv_residential/

As per the Nu-Air instruction, I have connected:
- G from furnace board to i2 on HRV
- I1 from HRV to G on Thermostat
- C from furnace board to C on HRV
- I have changed the jumper on HRV so that any speed HRV runs it should interlock with furnace

Help will be appreciated,
Thanks,
Josh

Do you not need a C to Tstat ?

[motoguy128]

Sometiems it helps to get the electrical circuits out, then make a sketch of what your trying to do. You may pretty quickly realize where you don't have a complete circuit. I will sadly admit that I've blown more than 1 fuse because I was "sure" I had it right, but clearly missed something.

[joshimh]

second opinion,

No as per manufacturer you do not need C going to T-Stat as long as C from furnace board goes to C on HRV.

[beb]

I dont see how the contol board can get 24volts on g if r is not hooked to HRV.