Energy Recovery Ventilation (Erv) Sections; Receiving And Inspection; Rigging And Stacking; Erv Wheel Motor Wiring - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

WARNING
All field gas piping must be pressure and leak-tested prior
to operation. Never use an open flame to check for leaks.
Use a soap solution or other leak detecting solution.
Pressure/leak test all connections prior to putting unit in ser-
vice. The furnace gas piping was leak-tested prior to shipping.
However, during shipping and installation connections may have
loosened. Check for leaks using a soap solution and correct any
leaks before placing furnace in operation.

Energy Recovery Ventilation (ERV) Sections

CAUTION
The assembled sections will result in a unit center of grav-
ity (CG) higher than the horizontal centerline. Exercise
proper care when rigging, lifting and transporting. Units
with a high CG will tip over more easily during installation
than those with a lower CG.
RECEIVING AND INSPECTION — Inspect the section for
freight damage upon receipt. Inspect the cassette that is
mounted inside the section. The cassette consists of a frame,
wheel assembly and segments. Verify that the wheel turns
freely by hand (clockwise when viewed from the pulley side).
Report any damage immediately to the freight company.
RIGGING AND STACKING — The ERV section sizes
03-17 are shipped fully assembled. These units can be
stacked and unstacked, as required, during installation by
following the same procedure as for larger units described
below.
NOTE: If an ERV section (size 08-17) does not fit through a
doorway, it may be taken apart by removing the top of the
section frame. This will expose the ERV wheel; take precau-
tions not to damage the wheel while moving the section.
Once the section is in place, put the top of the section frame
back on.
The ERV section sizes 21-30 are shipped unstacked due to
shipping height limitations. The lower sections are all assem-
bled on baserails and all fastened together on a single skid.
The upper sections are on a separate skid and fastened togeth-
er. Rigging and setting the lower sections is the same as for a
standard 39M indoor base unit. Refer to the Rigging Informa-
tion label on the unit.
CAUTION
The upper sections MUST be rigged and lifted one at a
time or injury or unit damage may occur.
Rigging and lifting upper sections:
1. Use the 4 lifting brackets holding the row of sections to
the skid.
2. Separate each section one at a time and install brackets
at each corner using the screws provided. Be careful not
to strip out the holes in the section frame. Lift and set
the section on top of the lower sections.
For sizes 21-30, upper sections should be stacked onto
the lower sections starting with the section upstream and
downstream of the wheel section, and then moving out-
ward to each end of the unit.
Repeat this process for the remaining ERV sections.
ERV WHEEL MOTOR WIRING — All ERV wheel motors
have stripped back power leads. For units with 3-phase wheel
motors, install and route the proper wire type and size directly
to the motor junction box provided.
For units with single-phase wheel motors connections
must be made in a separate, field-installed junction box. This
junction box must be installed in the ERV section close to the
motor. The ERV motors are VFD ready.
Refer to Table 33 for motor electrical data.
Table 33 — Electrical Requirements for
Energy Wheel Motor
MOTR
VOLTS-PHASE-Hz
115-1-50/60
200-230-1-50/60
12, 14, 17, 21
200-230/460-3-60 12, 14, 17, 21
200/400-3-50 12, 14, 17, 21
575-3-60 12, 14, 17, 21
Remove all construction debris from unit in-
Checklist —
terior. Verify that all drains are free of debris. Prime all con-
densate traps.
FILTERS — Install unit filters in all filter sections.
AIRFOIL AND FORWARD-CURVED FANS
1. Release the holddown that fastens the fan sled to the
section base.
2. Check lubrication of fan, motor bearings, and linkages.
Note that bearings are shipped completely full of grease
for corrosion protection and may run warm temporarily
on start-up until excess grease has discharged.
3. Check tightness of bearing setscrews (Fig. 106) or lock-
ing collars (Fig. 107). Also, check tightness of setscrews
on fan wheels and sheaves.
4. Check tightness of fan-shaft bearing mounting. See
Fig. 107.
5. Recheck sheave alignment and belt tension. (Refer to
Fig. 36 and 37.)
6. Hand turn fan to make certain fan wheel does not rub in
housing.
7. Check fan speed with a strobe-type tachometer or use
the following formula:
Obtain the motor rpm from the fan motor nameplate and
read sheave pitch diameters marked on the fan and mo-
tor pulleys, or approximate the pitch diameters by using
the pulley ODs.
Then:
Motor Rpm x Motor Sheave
Fan RPM =
Fan Sheave Pitch Diameter (in.)
Example:
Nameplate Motor
RPM
Motor Sheave Pitch
Diameter
Fan Sheave Pitch
Diameter
121
39M MOTOR MOTOR
UNIT SIZES HP AMPS (a)
03, 06 80 w
03, 06 80 w
08, 10 1/6
1/6
08, 10 1/6 0.7-0.88/0.44
1/6 0.7-0.88/0.44
25, 30 1/4 1.9-2.2/1.1
08, 10 1/6 0.7/0.44
1/6 0.7/0.44
25, 30 1/4
08, 10 1/6
1/6
25, 30 1/4

START-UP

Pitch Diameter (in.)
Actual Approximate
= 1760 1760
= 8.9 9.0 (OD)
= 12.4 12.5 (OD)
0.7
0.3
0.6
1.2
1.9/1.1
0.46
0.46
0.88