2 MC500-1ERV
The maximum weight of a MiniCore Ventilator is less than
225 lbs, Using
3/8
" all-thread and the included hanging
brackets is the preferable method of supporting the unit
though the use of metal strap to hang the unit is also
acceptable. When hanging the unit be sure to take into
account the need to provide access for filter replacement
and Core removal as well as blower balancing or removal
through the bottom access panels.
While orientation of the heat exchanging core inside of
the MiniCore Ventilator is important for maximizing airflow
orientation of the Ventilator itself is not, the MiniCore can
be mounted in a vertical or horizontal fashion. Additionally
the Fresh Air intake and Return intake can either be
mounted on the side of the MiniCore or on the end by
switching the duct collar and cover panel attached using
5/16
" screws.
See Figure 2.
Figure 2
Duct Option 2
Duct Option 1
Once the MiniCore Ventilator is hung connect ductwork to
proper sectors of the unit with
¼
" screws, use tape to seal
seams. Supply and Exhaust are labeled on the outside
of the cabinet and are determined by the orientation of
the Core inside of the MiniCore Ventilator, a sticker on
the Core will indicate the supply (outdoor air) vector.
The Outside Air and Return connections will always be
on the opposite side of the MiniCore Ventilator from their
respective Supply and Exhaust blowers.
See Figure 2.
Wiring
A
¾
" knock out is provided for high voltage on the top and
bottom of the high voltage disconnect switch mounted on
the side of the unit.
Figure 3
High voltage:
115V:
Connect the high voltage wires to L1 (Hot) &
L2 (Common), hook the ground wire to the provided
grounding nut.
See Wiring Diagrams on Pages 6-7.
208/230V:
Single phase: Connect the high voltage wires
to L1 (Hot) & L2 (Common) connect the ground wire to
the provided ground nut. Check Voltage into the unit and
adjust the voltage input to the transformer from 230V to
208V if necessary by switching wires at transformer.
See
Wiring Diagrams on Pages 6-7.
Low voltage:
Standard units:
Pass low voltage wire through the
provided knockout on the 2 gang terminal strip access
box next to the power disconnect, and connect R to
terminal #1 of terminal block TB38 and G to terminal #3.
See Wiring Diagrams on Pages 6-7 and Figure 3
The MiniCore Ventilator can be controlled by any dry
contact closure like those in a CO
2
sensor with relay,
switch or timer.
ECM units:
Pass the low voltage wiring through the
provide knockout on the terminal access box and connect
R to terminal #1 on 7 pin terminal box TB38 and G to #3.
The default wiring for the MiniCore Ventilator with ECMs
is to operate in the modulating speed mode terminals #4-7
are for speed control. To control both blowers in unison
wire the 0-10vdc control signal to terminals 4 (10vdc+)
and 5 (10vdc com) and add a jumper between terminals
4 and 6. If the Blowers are controlled independently then
wire the exhaust blower signal to terminals 4 &5 and the
supply signal to terminals 6 & 7,
See Adjusting Blower
Speed in Section IX - System Check
for balancing
information.
To use the motor in 2 speed operation attach the blue
wires from TB39 and TB40 to relays K163 & K164 at pin
#4. With the blue BL-25 and BL-30 wires in place the ECM
with default to 2 speed operation.
See Wiring Diagram
on page 7 and Figure 4.
