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I have Bryant HRV and the motor has failed. I have received a new motor but there are two extra wires on the replacement motor. Below I have described the wiring diagram from the original motor with the replacement motor following. My question is - do the two additional wires need to be connected? The VRV unit is a Model VB5AAB015 and the serial number is 0494V00006. This unit was instaled in my house in 1994. the original motor is a Fasco No 7190-0921 and the Type is U90B1 The connection diagram is as follows: White ------Line Black-------Line Brown----- - - Brown----- Green/yellow --ground The new motor is Model 71902271 and the type is U905B1 The connection diagram is different and this is where the two extra wires come in. On the control panel in the house there is no opportunity to change the speed of the unit. Connection Diagram Gray Common The gray and orange are together and have the same coupler as the white and black line on the old motor. Orange High Blue Medium Red Low Brown Brown Green/Yellow. So, do the blue and red wires need to be hooked up or can they just be secured? I don't believe my HRV motor has anything that these will attach to.

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Wire nut and tape the blue and red wires they are not used.

Posted on Mar 06, 2009

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