MAXA-MISER VR028A15M/H, Руководство по установке

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PAGE 4
When slowly rotating through counter flowing exhaust and
fresh air streams the UERV adsorbs sensible heat and
latent heat from the warmer air stream and transfer this
total energy to the cooler air stream during the second half
of its rotating cycle. Rotating at 60 revolutions per minute,
the wheel provides constant flow of energy from warmer to
cooler air stream. The large energy transfer surface and
laminar flow through the wheel causes this constant flow
of recovered energy to represent up to 85% of the
difference in total energy contained within the two air
streams.
Sensible and latent heat are the two components of total
heat. Sensible heat is energy contained in dry air and latent
heat is the energy contained within the moisture of the air.
The latent heat load from the outdoor fresh air on an air
conditioning system can often be two to three times that of
the sensible heat load and in the winter it is a significant
part of a humidification heat load.
During both the summer and winter, the UERV transfers
moisture entirely in the vapor phase. This eliminates wet
surfaces that retain dust and promote fungal growth as well
as the need for a condensate pan and drain to carry water.
Because it is constantly rotating when in the air stream, the
UERV is always being cleared by air, first in one direction
then the other. Because it is always dry, dust or other
particles impinging on the surface during one half cycle,
are readily removed during the next half cycle.
Additional Information for Options are provided in
Options Manual.
Re cov ery Mode
On a thermostat call for blower operation in heating,
cooling or continuous blower, the ERW 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 - Sys tem 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.
Figure 7
FIELD HARNESS
Figure 8
Figure 9
DOOR PANELS
PLATFORM SUPPORT RAIL
MAXA-MI$ER
Ô
UNITARY ENERGY RECOVERY VENTILATOR
MODEL VR028A15M/H & VR028A25H (STATIONARY)
INSTALLATION
INSTRUCTIONS
035-19268-002-A-0709 / R28A-18YDW