PAGE 2
CAM
BOLT
BOLT
NUT
END SWITCH BRACKET
Figure 2
Figure 3
TELESCOPING LEG
FOOT PAD
MICROSWITCH
WASHER
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
e l e c t r i c a l p o w e r t o u n i t O F F a t
disconnect switch(es). Unit may have
multiple power supplies.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
1.
Disconnect all power to rooftop unit.
2.
Remove the rooftop return air access panels. Also
remove any hoods and/or power exhaust equipment.
Discard hoods, power exhaust equipment, and return
air access panels.
3.
Verify and/or install an economizer. The ERV will
ONLY
work with RSI economizers:
4.
Remove the enthalpy control sensor from the
economizer. Keep enthalpy control sensor. It will be
reinstalled in the ERV.
5.
Locate the provided end switch, cam screw, washer,
bolts, nuts and bracket in box assembly.
6.
Install the cam on the economizer exposed blade pivot
with shoulder pointing outward by attaching with
provide 10-32 x 1" screw and rubber washer. Position
cam and screw, but do not completely tighten screw.
Next attach switch bracket to economizer end plate
using provided ½" self-tapping screws. Then mount
switch to bracket using the oblong holes with provided
6-32 x 1" bolts and nuts.
See Figure 2.
This cam will
trip the end switch S122 when damper rotates. Set the
end switch arm so that it closes when fresh air
dampers are open 50% or greater. Tighten screw to
secure cam.
7.
Locate the provided low voltage field harness. Wire
the field harness to the economizer controls per the
field wiring harness diagram provided in this
installation instructions. Remove the wires that were
connecting the enthalpy control of the economizer and
replace them with purple and blue wires on the field
wiring harness.
8.
Clean up wiring around the economizer and neatly
route the wires to clear any moving parts.
9.
Route the excess wire of the field wiring harness out
the return air. Coil the excess wire inside the rooftop
unit to clear installation of the ERV.
10. Install side fillter panel to RTU. Secure into place with
provided screws.
11. Attached platform support rail centered on rooftop unit
base rail with channel pointing upward.
12. Locate roll of provided ¾" and
1
8
" gasket material.
Apply ¾" gasket to the middle and bottom decks of the
ERV. Also apply
1
8
" gasket to perimeter of ERV that
contacts RTU.
13. Using lifting lugs, raise ERV unit approximately three
(3) feet. Remove nut and bolt assembly to slide
telescoping part of leg half way out of guide and attach
flat foot with hardware provided in bag assembly.
Position standoff legs so that flat foot is on bottom of
stand and reinstall nut and bolt assembly.
DO NOT
fasten tightly, adjustment will need to be made when
unit is put into position.
See Figure 3.
14. Lift and move ERV unit into position with open end
in-line with back door panel horizontal openings.
Note:
A treated 2" x 6" x 48" piece of wood or
equivalent equipment support should be used to
under feet of standoff legs to prevent roof
penetration.
15. Lower ERV into platform support rail catching the front
edge of the ERV bottom into the flange. With the ERV
in place, adjust the standoff legs to level and support
ERV against rooftop unit side filler panels. Use screws
to securely fasten ERV to rooftop unit. Tighten
securely. Rotate lifting lug to original position and
tighten machine bolts.
