Operation - Honeywell W6215 Series Product Data

Logic Module Actuator
W6215A Honeywell Series 62 Single
W7215A Honeywell Series 72 Single
Honeywell Series 90 n/a
W7215B Honeywell Series 72 Single
W7460A Honeywell M7415
W7460B Honeywell M7415
ALL n/a
Parallel Wiring
W6215 Honeywell Series 62 Single or Differential
W7215A Honeywell Series 72
Honeywell M7415

OPERATION

The purpose of the economizer is to use outdoor air for
cooling, whenever possible, to reduce compressor operation.
When wired as shown in Fig. 6 through 25, the logic module
responds to the cooling thermostat signal. This system
uses C7400 Solid State Enthalpy Changeover Sensor(s) or
C7650 Dry Bulb Temperature Sensor(s). The C7400 responds
to both dry bulb temperature and humidity, allowing use of
outdoor air at higher temperatures for free cooling when
humidity is low. The C7650 responds only to dry bulb
temperature; use only in dry, arid climates.
The logic module functions as a true first stage of cooling
providing maximum fuel economy during the cooling cycle.
It automatically locks out free cooling during heating; holding
the outdoor air damper at the minimum position setting.
The logic module can operate as either a basic free cooling
controller, or it can incorporate additional functions. Tables 3
and 5 detail the input/output (I/O) logic of the module. Certain
functions—Purge, Shutdown, and Air Change—override
others, see Table 3. When these functions are all off, the logic
module energizes the Unit Control and Indoor Fan contacts,
operating according to Table 5.
Table 2. Applicable Wiring Diagrams.
Enthalpy Changeover
8
Single or Differential 9
10
Single or Differential 11
12
6
13
Single or Differential 14
15
Single 16
Single or Differential 17
Single 18
Single or Differential 19
n/a 20
25
4
21
22
23
24
5
W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
Figure
Single-stage cooling system.
Two-stage cooling system.
Single-stage cooling system.
Two-stage cooling system.
T775 controller.
Add Q7230 Interface Module.
Single-stage cooling system.
Two-stage cooling system.
T775 controller.
Single-stage cooling system.
Two-stage cooling system.
Single-stage cooling system.
Two-stage cooling system.
W7100 controller.
W973 Logic Panel.
S963 remote damper control.
Honeywell Series 62 Direct Coupled Actuators.
Honeywell Series 72 Direct Coupled Actuators.
Honeywell Series 72 Modutrol Motors.
M7415 Motors.
Purge (W6215A, W7215A, and W7460A only)
When terminals PG and PG1 connect through relay contacts
or a jumper:
1. Outdoor damper drives fully closed.
2. Exhaust fan turns on.
OPEN
MINIMUM
POSITION
ADJUSTMENT
P
CW
MAXIMUM
POSITION
ADJUSTMENT
Q
CW
W6215/W7215/W7460 ECONOMIZER
Fig. 4. S963B1128 Remote Potentiometer used with
W6215, W7215, W7460 for remote damper control.
Comments
S963B1128 REMOTE
POTENTIOMETER
R
CCW CW
CLOSE
OPEN
P1
B W
135 OHM
S963B1128 REMOTE
POTENTIOMETER
Q1
R
CCW CW
OPEN CLOSE
B W
135 OHM
M11796A
63-2544—3