73
rigging
as
shown
in
the
following
illustration.
Figure 42 - Lifting Hole Locations
Routine
maintenance
of
the
Energy
Recovery
Cassettes
includes
periodic
cleaning of the Energy Recovery Wheel as
well as inspection of the Air Seals and
Wheel Drive Components as follows:
Cleaning
The need for periodic cleaning of the energy
recovery wheel will be a function of
operating
schedule,
climate
and
contaminants in the indoor air being
exhausted and the outdoor air being supplied
to the building.
The energy recovery wheel is “self-
cleaning” with respect to dry particles due to
its laminar flow characteristics. Smaller
particles pass through; larger particles land
on the surface and are blown clear as the
flow direction is reversed. Any material that
builds up on the face of the wheel can be
removed with a brush or vacuum. The
primary need for cleaning is to remove oil
based aerosols that have condensed on
energy transfer surfaces.
A characteristic of all dry desiccants, such
films can close off micron sized pores at the
surface of the desiccant material, reducing
the efficiency by which the desiccant can
adsorb and desorb moisture and also build
up so as to reduce airflow.
In a reasonably clean indoor environment
such as a school or office building,
measurable reductions of airflow or loss of
sensible (temperature) effectiveness may not
occur for several years. Measurable changes
in latent energy (water vapor) transfer can
occur in shorter periods of time in
applications such as moderate occupant
smoking
or
cooking
facilities.
In
applications experiencing unusually high
levels of occupant smoking or oil based
aerosols such as industrial applications
involving the ventilation of machine shop
areas for example, annual washing of energy
transfer may be necessary to maintain latent
transfer efficiency. Proper cleaning of the
energy recovery wheel will restore latent
effectiveness to near original performance.
To clean, gain access to the energy recovery
wheel and remove segments. Brush foreign
material from the face of the wheel. Wash
the segments or small wheels in a 5%
solution of non-acid based coil cleaner or
alkaline detergent and warm water.
Soak in the solution until grease and tar
deposits are loosened (Note: some staining
of the desiccant may remain and is not
harmful to performance). Before removing,
rapidly run finger across surface of segment
to separate polymer strips for better cleaning
action. Rinse dirty solution from segment
and remove excess water before reinstalling
in wheel.
Summary of Contents for M2 Series
Page 2: ......
Page 5: ...5 Split System Piping Diagrams 98 M2 Series Startup Form 115 Maintenance Log 121 ...
Page 35: ...35 Table 1 Electric and Gas Heating Capacities ...
Page 38: ...38 Figure 5 M2 Series Unit Four Point Lifting ...
Page 39: ...39 Figure 6 M2 Series Unit Eight Point Lifting ...
Page 58: ...58 Figure 32 Supply Fan Banding ...
Page 95: ...95 Figure 52 Filter Layout Viewed from the Upstream Side of the Cooling Coil ...
Page 98: ...98 Split System Piping Diagrams Figure 53 A C Split System Piping Suction Down ...
Page 99: ...99 Figure 54 A C Split System Piping Suction Up ...
Page 100: ...100 Figure 55 A C with LAC Split System Piping Suction Up ...
Page 101: ...101 Figure 56 A C with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 102: ...102 Figure 57 A C with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 103: ...103 Figure 58 A C with Hot Gas Bypass Split System Piping Suction Down ...
Page 104: ...104 Figure 59 A C with Hot Gas Bypass Split System Piping Suction Up ...
Page 107: ...107 Figure 62 Heat Pump Split System Piping Suction Down ...
Page 108: ...108 Figure 63 Heat Pump Split System Piping Suction Up ...
Page 109: ...109 Figure 64 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 110: ...110 Figure 65 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 111: ...111 Figure 66 Heat Pump with Hot Gas Bypass Split System Piping Suction Down ...
Page 112: ...112 Figure 67 Heat Pump with Hot Gas Bypass Split System Piping Suction Up ...