Inputs; Outputs; Environmental; Economizer Module Wiring Details - Carrier Legacy 548J07 Installation Instructions Manual

• Relay Digital Output Rating at 30 vac (maximum power
from Class 2 input only) — 1.5A run:
3.5A inrush at 0.45PF (200,000 cycles) or
7.5A inrush at 0.45PF (100,000 cycles)
• External Sensors Power Output — 21 vdc ± 5% at 48mA
IMPORTANT: All inputs and outputs must be Class 2 wiring.

INPUTS

Sensors
NOTE: A Mixed Air (MA) analog sensor is required on all
W7220 units; either an Outdoor Air (OA) sensor for dry bulb
change over or an OA bus sensor for outdoor enthalpy change
over is required in addition to the MA sensor. An additional Re-
turn Air (RA) bus sensor can be added to the system for differen-
tial enthalpy or dry bulb changeover. For differential dry bulb
changeover, a 20k ohm sensor is required in the OA and a bus sen-
sor in the RA. DIP switch on RA bus sensor must be set in the RA
position.
Dry Bulb Temperature (optional) and Mixed Air (required),
20k NTC
2-wire (18 to 22 AWG);
Temperature range –40°F to 150°F (–40°C to 66°C)
Temperature accuracy: 0°F/+2°F
Temperature and Humidity, C7400S1000 (optional)
S-Bus; 2-wire (18 to 22 AWG)
Temperature: range –40°F to 150°F (–40°C to 65°C)
Temperature accuracy: 0°F/+2°F
Humidity: range 0 to 100% RH with 5% accuracy.
NOTE: Up to three (3) S-Bus sensors may be connected to the
W7220 economizer module for outdoor air (OA), return air (RA)
and discharge (supply) air (DA).
4 Binary Inputs
1-wire 24 vac + common GND (see page 28 for wiring details).
24 vac power supply
20 to 30 vac 50/60Hz; 100 VA Class 2 transformer.

OUTPUTS

Actuator Signal
2 to 10 vdc; minimum actuator impedance is 2k ohm; bus two-
wire output for bus communicating actuators.
Exhaust fan, Y1, Y2 and AUX1 O
All Relay Outputs (at 30 vac):
Running: 1.5A maximum
Inrush: 7.5A maximum

ENVIRONMENTAL

Operating Temperature
–40°F to 150°F (–40°C to 65°C).
Exception of display operation down to –4°F with full recovery
at –4°F from exposure to –40°F
Storage Temperature
–40°F to 150°F (–40°C to 65°C)
Shipping Temperature
–40°F to 150°F (–40°C to 65°C)
Relative Humidity
5% to 95% RH non-condensing

ECONOMIZER MODULE WIRING DETAILS

Use Fig. 46 and Tables 8 and 9 to locate the wiring terminals
for the Economizer module.
NOTE: The four terminal blocks are removable. Slide out each
terminal block, wire it, and then slide it back into place.
MAT
MAT
OAT
OAT
S-BUS
S-BUS
IAQ 2-10
IAQ COM
IAQ 24V
ACT 2-10
ACT COM
ACT 24V
50040839-001
Rev. G
Fig. 46 — W7220 Wiring Terminals
Table 8 — Economizer Module
(Left Hand Terminal Blocks)
LABEL TYPE
Top Left Terminal Block
MAT 20k NTC
MAT and COM
OAT 20k NTC
OAT and COM
S-BUS S-BUS
S-BUS (Sylk* Bus)
Bottom Left Terminal Block
IAQ 2-10 2-10 vdc
IAQ COM COM
IAQ 24V 24 vac
ACT 2-10 2-10 vdc
ACT COM COM
ACT 24v 24 vac
*Sylk is a trademark of Honeywell International Inc.
27
MA
NA
MA
A2
OA
OC C
OA
EX
SB
SB
A1
SB
SB
Cert Product
California Title 24, Part 6
HJW10
SB
SB www.energy.ca.gov
V
Y2I
C
R
Y2O
Y1I
V
Y1O
C
R
C
NA
R
50048848-002
DESCRIPTION
Mixed Air Temperature Sensor (Polarity
Insensitive Connection)
Outdoor Air Temperature Sensor (Polarity
Insensitive Connection)
Enthalpy Control Sensor
(Polarity Insensitive Connection)
Air Quality Sensor Input (e.g. CO
sensor)
Air Quality Sensor Common
Air Quality Sensor 24 vac Source
Damper Actuator Output (2-10 vdc)
Damper Actuator Output Common
Damper Actuator 24 vac Source
NA
AUX2-
OCC
E-GND
EXH1
AUX1-O
Y2-
Y2-O
Y1-
Y1-O
C
R
Rev. A
2