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45
Connections and Applications
W7220 Economizer Module Wiring —
Use Fig. 54 and Tables 10 and 11 to locate the wiring
terminals for the Economizer module.
W7220 Controller
Left Terminal
Block Label
Right Terminal
Block Label
C12014
Fig. 54 -- W7220 Economizer Module Terminal Connection Labels
Table 10 – Economizer Module --
Left Hand Terminal Blocks
Label
Type
Description
Top Left Terminal Block
MAT
MAT
20k NTC
and
COM
Supply Air Temperature Sensor
(polarity insensitive connection)
OAT
OAT
20k NTC
and
COM
Outdoor Air Temperature Sensor
(polarity insensitive connection)
S---BUS
S---BUS
S---Bus
(Sylk Bus)
Enthalpy Control Sensor
(polarity insensitive connection)
Bottom Left Terminal Block
IAQ 2---10
2---10 Vdc
Air Quality Sensor Input
(e.g. CO
2
sensor)
IAQ COM
COM
Air Quality Sensor Common
IAQ 24V
24 Vac
Air Quality Sensor 24 Vac Source
ACT 2---10
2---10 Vdc
Damper Actuator Output (2---10 Vdc)
ACT COM
COM
Damper Actuator Output Common
ACT 24V
24 Vac
Damper Actuator 24 Vac Source
Table 11 – Economizer Module --
Right Hand Terminal Blocks
Label
Type
Description
Top Right Terminal Block
n/a
The first terminal is not used
AUX2 I
24 Vac IN
Input from Thermostat W1 indicating
base unit is in Heat mode, damper
controls to High Fan Speed
setpoints
OCC
24 Vac IN
Occupied / Unoccupied Input
E---GND
E---GND
Earth Ground --- System Required
EXH1
24 Vac OUT Exhaust Fan 1 Output
AUX1 O
24 Vac OUT Programmable:
Exhaust fan 2 output
or
Erv
or
System Alarm output
Bottom Right Terminal Block
Y2---I
24 Vac IN
Y2 in --- Cooling Stage 2 Input from
space thermostat
Y2---O
24 Vac OUT Y2 out --- Cooling Stage 2 Output to
stage 2 mechanical cooling
Y1---I
24 Vac IN
Y1 in --- Cooling Stage 2 Input from
space thermostat
Y1---O
24 Vac OUT Y1 out --- Cooling Stage 2 Output to
stage 2 mechanical cooling
C
COM
24 Vac Common
R
24 Vac
24 Vac Power (Hot)
Refer to Figs 55 and 56 for sensor and controls connections.
Summary of Contents for 50LC 07
Page 9: ...9 COOLING CHARGING CHARTS C150169 Fig 9 Cooling Charging Charts 07 ...
Page 10: ...10 COOLING CHARGING CHARTS C150172 Fig 10 Cooling Charging Charts 08 ...
Page 11: ...11 COOLING CHARGING CHARTS C150170 Fig 11 Cooling Charging Charts 09 ...
Page 12: ...12 COOLING CHARGING CHARTS C150171 Fig 12 Cooling Charging Charts 12 ...
Page 27: ...27 C150181 Fig 34 50LC 07 Control Wiring Diagram ...
Page 28: ...28 C150225 Fig 35 50LC 07 RTU Open Control Wiring Diagram ...
Page 29: ...29 C14095 Fig 36 50LC 07 Power Wiring Diagram 208 230V 460V and 575V Units ...
Page 30: ...30 C14013 Fig 37 50LC 08 12 Control Wiring Diagram ...
Page 31: ...31 C14104 Fig 38 50LC 08 12 RTU Open Control Wiring Diagram ...
Page 32: ...32 C14105 Fig 39 50LC 08 12 Power Wiring Diagram 208 230V Units ...
Page 33: ...33 C150216 Fig 40 50LC 08 12 Power Wiring Diagram 460V 575V Units ...
Page 57: ...57 C13683 Fig 62 Typical EconoMi er X Wiring Diagram ...