iFLOW HVAC INC.
www.iflowhvac.com
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To ensure the iFLOW can protect the A/C evaporator coil from
freezing up, iFLOW has an “A/C EVAP Temperature sensor” (part
number: 30ETS01B) that must be attached to A/C coil in a way that
it is able to sense the accurate air temperature coming directly off
(downstream of) the A/C evaporator coil. Figure E below depicts
the location of the A/C Evaporator Temperature sensor when using
a cased coil or an A-coil in the supply duct and Figure F depicts the
location of the A/C Evaporator Temperature sensor when using a slab
coil in the return duct. In both cases, insert the sensor in between the
fins on the coil.
Step 2
FIGURE E:
FIGURE F:
AHU with
Case Coil or A Coil
on the Supply
Evaporator
Temperature
Sensor position
Air
Flow
Evaporator
Temperature
Sensor position located
downstream of slab coil
AHU with slab
coil on the Return
Air
Flow
Position the sensor in the A-coil in the supply duct as shown above
in Figure E. To relocate the A/C evaporator temperature sensor to
a slab coil in the return duct, follow the following steps. From the
factory, the sensor is placed loose on top of the hydronic coil. Follow
the wire back towards the PCB and disconnect the sensor at the
black male/female connector located between the sensor and the
PCB. Gently push the sensor back through the rubber grommet; the
sensor is now free. Relocate the sensor as shown above in Figure F.
Once the sensor is relocated, reconnect the wire. If necessary, use
any thermostat wire to extend the length of the sensor wire. When
running the wire back to the original connector, ensure the wire runs
around and not in front of the PCB and transformer.
The connection port on the iFLOW PCB for the A/C Evaporator
Temperature sensor varies by model but is generally located near
the top center of the PCB. Please consult the PCB schematic in the
installation manual for details.
If steps 1 & 2 are followed, the iFLOW delivers A/C evaporator and
hydronic coil freeze protection.
IMPORTANT
