PAGE 4
IX -
Sys tem Check
1- Disconnect main power.
2- Turn to "Cont" for blower operation on thermostat controlled models.
3- Restore power to unit. Observe ERV wheel rotation and both fresh air and exhaust air blowers while operating.
NOTE: If Low ambient kit is used the jumper between TB37-5 & TB37-6 should be removed. Also if system check
out is being conducted at low ambient temperatures, technician should be aware that this kit can cause
system not to operate.
4- Verify that the ERV (3) three phase blower motors are phased sequentially ensuring correct rotation and operation.
a - Disconnect power.
b - Reverse any two field power leads to the ERV.
c - Reapply power.
5- Verify that both blower motors are operating under their full load AMP rating (FLA). The FLA can be found on each
motor and the unit nameplate
A - Re turn Damper Set tings
Manually adjust position of field installed dampers to balance air flow.
B - Air Flow / Blower Speed Ad just ment
Blower speed selection is accomplished by changing the sheave setting on both fresh air and exhaust air blowers. To set
ERV for the required air flow (CFM), the external static pressure applied to the ERV (duct static) must be known. See the
CFM vs External Static Pressure chart for the appropriate unit to determine the correct blower RPM for the specified CFM
and External Static Pressure.
After blower speed adjustments have been made. Ensure that when the belt is replaced it is tensioned correctly. The
motor mounting plate can be adjusted to tension the belt. If using a belt tension checker, adjust the span to the appropriate
setting and check the belt defection force. The belt deflection force should be between 5-8 lbs or the lowest tension at
which the belt will not slip under peak load conditions.
5- Disconnect main power to unit before making adjustment to economizer and/or ERV unit.
6- Replace ERV control access cover.
7- Set thermostat to normal operating position.
8- Restore power to unit.
X
-
Maintenance
1- All motors use prelubricated sealed bearings; no further lubrication is necessary.
2- Make visual inspection of motors, belts and wheel rotating bearings during routine maintenance.
B
C
A
D
E
D
HUB
SEGMENT
FIGURE 5
SPOKE
SEGMENT RETAINER CATCH
WHEEL RIM
SEGMENT RETAINER
3- Eight pie-shaped segments are seated on stops between
the segment retainer which pivots on the wheel rim and is
secured to the hub and rim of the wheel. Annual inspection
of the self cleaning wheel is recommended. With power
disconnected, remove ERV access panels (rear) and
unplug [J150 & P150]
(Refer to wiring diagram in this
instruction manual).
Remove segment and wash with
water and/or mild detergent.
4- To install wheel segments follow steps A through E .
See
Figure 1
. Reverse procedure for segment removal.
A- Unlock two segment retainers (one on each side of the
selected segment opening.
B- With the embedded stiffener facing the motor side,
insert the nose of the segment between the hub plates.
C- Holding segment by the two outer corners, press the
segment towards the center of the wheel and inwards
against the spoke flanges. If hand pressure does not
fully seat the segment, insert the flat tip of a screw driver