Lennox CHA16, Руководство по обслуживанию

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Page 45
FIGURE 47
WIRE TIES
MIXED
AIR
SENSOR
REMD16
MIXED AIR SENSOR LOCATION
FILTER
e-Wiring, Installation, Maintenance
The economizer uses harness plugs to connect to the
CHA16 unit harness connector located in the filter ac
cess compartment.Unlike smaller 16 series econo
mizers which are unitary in construction (all one
piece), the REMD16M-185 economizer has a control
relay kit (consists of enthalpy control and relays)
installed in the unit filter access section.The damper
section (consists of dampers and damper motor) is
installed separately in the return air section.Figure 48
shows economizer control installation and wiring.Fi
gures 49 and 50 show REMD16M installation.Al
though harness connectors are used to connect the
CHA16 to the economizer, the economizer electrical
ly connectsto the CHA16 differently depending on
which control system has been installed.The different
electrical connections are made in relay kits and con
trols located in the filter access area of the unit.All
connections (except for enthalpy sensor and mixed
air sensor) are made with quick-connect type har
ness connectors.For specific details of economizer
wiring and operation, refer to the sequence of opera
tion section of this manual.
Figures 49 and 50 show how an REMD16M is
installed in a CHA16 cabinet (downflow application
shown).For detailed installation and maintenance in
structions, refer to the REMD16-185M installation in
structions.
DAMPERS
ENTHALPY
SENSOR
TO MIXED
AIR SENSOR
RELAY
ENTHALPY
CONTROL
REMD16M ENTHALPY CONTROL/RELAY KIT
FIGURE 48
P9
J3
P4
J9
REMD16M
P18
From PED16 used only
with power exhaust
WIRE TIE
REMD16M
f-Modulating Damper Motor Check
The following procedure checks only the damper mo
tor.For detailed economizer checkout procedure re
fer toLennox' Solid State Economizer Checkout And
Troubleshooting Guide.
FIGURE 49
DAMPER
MOTOR
REMD16M
DAMPER
ASSEMBLY
REMD16M DAMPER ASSEMBLY INSTALLATION
HORIZONTAL
MULLION
HORIZONTAL
MULLION
DAMPER
FRAME