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26
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
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
sensor 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 to 150°F (-40 to 65°C)
Temperature accuracy -0°F/+2°F
Temperature and Humidity, C7400S1000 (optional)
S-Bus; 2-wire (18 to 22 AWG)
Temperature: range -40 to 150°F (-40 to 65°C)
Temperature accuracy -0°F/+2°F
Humidity: range 0 to 100% RH with 5% accuracy.
NOTE: Up to three 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.
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 to 150°F (-40 to 65°C).
Exception of display operation down to -4°F with full re-
covery at -4°F from exposure to -40°F
Storage Temperature
-40 to 150°F (-40 to 65°C)
Shipping Temperature
-40 to 150°F (-40 to 65°C)
Relative Humidity
5% to 95% RH non-condensing
ECONOMIZER MODULE WIRING DETAILS
Use Fig. 49 and Tables 4 and 5 to locate the wiring termi-
nals for the Economizer module.
NOTE: The four terminal blocks are removable. You can slide
out each terminal block, wire it, and then slide it back into place.
Fig. 49 — W7220 Wiring Terminals
Table 4 — Economizer Module - Left Hand Terminal
Blocks
IMPORTANT: All inputs and outputs must be Class 2
wiring.
LABEL
TYPE
DESCRIPTION
Top Left Terminal Block
MAT
MAT
20k NTC
and COM
Mixed 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 24-v
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 24-v
24 vac
Damper Actuator 24 vac Source
NA
AUX2-
OCC
E-GND
EXH1
AUX1-O
Y2-
Y1-
Y2-O
Y1-O
C
R
5004
88
4
8
-002
Rev. A
NA
A2
OCC
EX
A1
Y2I
Y2O
Y1I
Y1O
C
R
Cert
Prod
u
ct
C
a
liforni
a
Title 24, P
a
rt 6
HJW10
www.energy.c
a
.gov
MAT
MAT
OAT
OAT
S
-BU
S
S
-BU
S
IAQ 2-10
IAQ COM
IAQ 24V
ACT 2-10
ACT COM
ACT 24V
MA
MA
OA
OA
S
B
S
B
S
B
S
B
S
B
S
B
V
C
R
V
C
R
NA
50040
83
9-001
Rev. G
Summary of Contents for WeatherMaster 50HC14
Page 4: ...4 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing 14 Size Unit cont HORIZONTAL ECONOMIZER VERTICAL ECONOMIZER ...
Page 8: ...8 Fig 4 Roof Curb Details ...
Page 24: ...24 Fig 46 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 39: ...39 Fig 54 50HC14 Control Box Component Locations with ComfortLink Controls ...
Page 40: ...40 Fig 55 50HC14 ComfortLink Control Wiring Diagram ...
Page 41: ...41 Fig 56 50HC14 ComfortLink Power Wiring Diagram ...
Page 42: ...42 Fig 57 50HC14 ComfortLink with Humidi MiZer Power Wiring Diagram ...
Page 44: ...44 Fig 60 PremierLink Wiring Schematic ...
Page 45: ...45 Fig 61 PremierLink Wiring Schematic with Humidi MiZer System Option ...
Page 53: ...53 Fig 80 RTU Open System Control Wiring Diagram ...
Page 54: ...54 Fig 81 RTU Open System Control Wiring Diagram with Humidi MiZer System Option ...
Page 64: ......
Page 65: ......