Bard MULTI-TEC W18ABP Series, Literature Assembly

Page: 43 / 128

Manual 2100-712C
Page 19 of 38
When the wall-mount unit receives a dehumidification
call from the LC6000, the wall-mount unit will
disable the economizer to force the system to use air
conditioning and prevent any additional humidity from
being introduced from outdoor air. The wall-mount unit
will then turn on the air conditioning system which will
remove moisture and cool the space. At the same time,
the electric reheat coil will be energized to extend the
run time of the cooling cycle and prevent cool air from
being introduced to the space.
When the dehumidification command is first received
both cooling and reheat will be activated.
The cooling will shut off when the return air
temperature is 62°F to prevent the unit from causing
the system to go into heating mode (see Figure 29).
The compressor will turn on again once the return
temperature rises to 75°F.
The electric heat will operate to maximize cooling times
which will in turn remove moisture from the space. The
electric reheat will turn on when the temperature falls
to 73°F and will turn back off at 75°F.
The system will continue to operate this way until the
LC removes the call for active dehumidification.
A heating or cooling call will disable the dehumidification
call. Dehumidification can only take place when system
is not actively heating or cooling.
For a more detailed operation description, see the 2100-
669 LC6000 Service Instructions manual.
FIGURE 29
Dehumidification Control
Reheat
Cool
62 64 66 68 70 72 74 76 78 58 60 59 61 63 65 67 69 71 73 75 77 79