Lennox CHA16, Руководство по обслуживанию

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WARM UP KIT
FIGURE 57
J8
P
8
Page 51
FIGURE 56
TYPICAL FILTER ACCESS SECTION 15 TON AND LARGER
UNITS
J24
J3
P16
J33
UNIT FILTER
SECTION
ACCESS DOOR
1/4 TURN LATCH
ECONOMIZER ENTHALPY
CONTROL INSTALLS IN THIS AREA
PED16 CONTROL
INSTALLS IN THIS AREA
CONDENSER
FILTER ACCESS
DOOR QUARTER-
TURN
FASTENER
K-Optional Commercial Controls Systems
Optional 16 Series Commercial Controls" may be connected
to any CHA16 series commercial unit. These are the same
controls which are optional in all 16 series commercial units.
The following list describes the components used in all cur
rently available (at time of printing) optional control system
combinations. Each system is assigned a C" number for
easy reference. The C" number identifies the control system
on the wiring diagram (likewise, each CHA16 unit wiring dia
gram is assigned a B" number, each heating section is as
signed an A" number and each economizer diagram is as
signed a D" number). Look for these numbers on the dia
gram to help you identify how the unit is setup and the control
system being used.
The control system wiring diagrams and the accompany
ing system Operation Sequences" are not included in this
manual. Look for the control system diagrams and the op
eration sequence sections in the 16 Series Control Sys
tems" manuals printed separately.
The following section is provided to help service personnel
become familiar with Lennox' Commercial Controls and
the associated wiring schemes.
1 -
D5 Wiring Diagram - Modulating Economizer
Model Number REMD16M-185
Downflow Modulating Economizer. Optional field
installed in all CHA16 units. Sensors continuously moni
tor air conditions and adjust dampers accordingly. Infi
nite number of damper positions.
All wiring connections are made by jackplug connec
tions to the commercial controls harness in the unit.
Plug P4 in the economizer connects to Jack J3 in the
unit to make this connection.
2 - Warm-Up Kit
Warm-up kit is shown in Figure 57. Warm-up kit is an
accessory to the economizer (diagram D5).
The kit provides
warm-up capa
bilities by holding
outdoor air
dampers closed
during the first
heating period
after night set
back. When first
heating demand
is satisfied,
warm-up kit allows outdoor air dampers to open to
minimum position.
Warm-up kit does not have its own wiring diagram.
It is included in the C2, C4, C6 and C14 wiring dia
grams.
All wiring connections are made by jackplug connec
tions to the commercial controls harness in the unit.
See figures 58 and 59.
Plug P8 in the warm up kit
connects to Jack J3 in the unit to make this connec
tion.
Jack J8 in the warm up kit connects to Plug P4 in
the economizer. Thermostat wiring connections are
made to the unit low voltage terminal strip.
Some of the following optional thermostat control
systems have built-in warm up capabilities and the
warm up kit (figure 57) cannot be added due to wiring
incompatibility.
The warm-up kit is an option to the REMD16M econo
mizer. The warm-up kit may be applied to any econo
mizer (except units using W7400 control system or
T7300 control system). If W973 control system is be
ing used, CMC3-1 time clock must also be used. If
electromechanical control system is being used,
CMC3-1 time clock and night thermostat must be
used.