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INSTALLATION
INSTRUCTIONS
FROST THRESHOLD TEMPERATURE
INDOOR RH AT
FROST THRESHOLD
o
70
F
20%
30%
40%
Because Unitary Energy Recovery Ventilators have a low
frost threshold, frost control options are not necessary in
many climates. Where outdoor temperatures may drop
below the frost threshold during the UERV operational
hours, exhaust only frost control option is available.
Recovery Wheel Mode
On an Energy Management activation or call for blower
operation in heating, cooling or continuous blower, the
UERV will rotate between fresh air and exhaust air
streams. Both the fresh air and exhaust air blowers will
also be operating to overcome the air resistance of the
UERV.
IX -
System Check
1- Disconnect main power.
2- Turn thermostat to "Cont" for blower operation.
3- Restore power to unit. Observe UERV wheel rotation
and both fresh air and exhaust air blowers will
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 UERV (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 UERV.
c)
Reapply power.
A - Return Damper Settings
Manually adjust position of dampers. This is accomplished
by loosing and tightening set screw on positioning rod.
B - Blower Speed Adjustment
Blower speed selection is accomplished by changing the
sheave setting on both fresh air and exhaust air blowers.
Both blowers are factory set at "closed" for maximum
airflow. To determine air flow setting, external static
pressure readings will need to be read across the UERV.
To take pressure readings remove plugs in UERV door
TEMPERATURE
o
0
F
o
5
F
o
10
F
PAGE 5
MAXA-MI$ER™
UNITARY ENERGY RECOVERY VENTILATOR
MODEL VR036A15H/25H & VR046A15H/25H
& VR062A15M/H/25M/H (STATIONARY)
¾ x 1 ¼ GASKET
Figure 10
UERV TOP FLANGE UNDER RTU TOP
Figure 11
SIDE FILLER PANEL
Figure 12
SIDE FILLER PANEL
Figure 13
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