Prepare To Braze; Prepare Ahu Control Box If Exv Is Inside The Box; Install Exv Outside Of The Box; Remove Exv - Lennox VPB036H4M Installation Instructions Manual

Prepare to Braze

CAUTION
Coil sensors shall not be installed prior to brazing as
damage to the sensor can occur due to excessive heat.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting
of refrigerant (CFC's and HCFC's) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for non-compliance.

Prepare AHU Control Box if EXV is Inside the Box

1. The seal on the refrigerant piping connections should
remain in place until the last possible moment. This
will prevent dust or moisture from getting into the
refrigerant piping before it is connected.
2. Remove plastic caps from liquid line connections.
3. Swage field-provided connective piping, do not swage
factory pipe stub.

Install EXV Outside of the Box

The EXV may be removed from the control box and
positioned in an external location. Follow these steps to
remove the EXV from the box.
1. Remove the front cover from the box by removing four
screws and plastic washers. See Figure 7.
Remove 4 screws
and plastic washers
securing front cover panel.
NOTE - Electrical components and VRF PCB must
remain inside the rated factory enclosure.
Figure 11. Remove Front Cover
2. Remove the two (2) screws securing the electrical
control board assembly. See Figure 12.
3. Flip the electrical control board assembly forward 90°
to expose the EXV. See Figure 13.
Remove 2 screws
securing electrical
control board
assembly
16
(0°~90°)
Figure 12. Flip Electrical Control Board Assembly
Forward
4. Remove eight (8) screws and four (4) brackets that
secure the EXV in the box. See Figure 13.
Figure 13. Remove EXV
5. Re-install the front cover on the AHU Control Box.
6. Position the EXV in the desired location and use the
screws and clamps removed in step 4 to secure the
EXV in place.