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When the outdoor air cfm sensor is enabled, the Economizer
Min.Position (
Configuration
IAQ
DCV.C
EC.MN
) and the
IAQ Demand Vent Min.Pos (
Configuration
IAQ
DCV.C
IAQ.M
) will no longer be used. During vent periods, the
control will modulate the damper to maintain the outdoor air in
-
take quantity between
O.C.MX
and
O.C.MN
. The indoor air qual
-
ity algorithm will vary the cfm between these 2 values depending
on
Configuration
IAQ
AQ.SP
DAQ.L
and the
Configura
-
tion
IAQ
AQ.SP
DAQ.H
set points and upon the relation
-
ship between the IAQ and the outdoor air quality (OAQ).
The economizer’s OA CFM Minimum Position Deadband
(
O.C.DB
) is the deadband range around the outdoor cfm con
-
trol point at where the damper control will stop, indicating the
control point has been reached. See the Economizer section for
more information.
Humidification
The N Series
Comfort
Link controls can control a field-supplied
and field-installed humidifier device. The
Comfort
Link con
-
trols provide 2 types of humidification control: A discrete stage
control (via a relay contact) and a proportional control type
(communicating to a LEN actuator). The discrete stage control
is used to control a single-stage humidifier (typically a spray
pump). The proportional control type is typically used to con
-
trol a proportional steam valve serving a steam grid humidifier.
The
Comfort
Link controls must be equipped with a controls
expansion module and an accessory space or return air relative
humidity sensor.
If a humidifier using a proportional steam valve is selected, the
Carrier actuator (Carrier Part No. HF23BJ050) must be adapted to
the humidifier manufacturer’s steam valve. Contact Belimo Air
controls for information on actuator linkage adapter packages re
-
quired to mount the actuator on the specific brand and type of
steam valve mounted by the humidifier manufacturer.
The actuator address must be programmed into the
Com
-
fort
Link unit’s humidifier actuator serial number variables.
SETTING UP THE SYSTEM
These humidity configuration are located in the local displays
under
Configuration
HUMD
. See Table 58. Related points
are shown in Table 59.
Humidifier Control Configuration (HM.CF)
The humidifier control can be set to the following configurations:
•
HM.CF
= 0 — No humidity control.
•
HM.CF
= 1 — Discrete control based on space relative
humidity.
•
HM.CF
= 2 — Discrete control based on return air relative
humidity.
•
HM.CF
= 3 — Analog control based on space relative hu
-
midity.
•
HM.CF
= 4 — Analog control based on return air relative
humidity.
Humidity Control Set Point (HM.SP)
The humidity control set point has a range of 0 to 100%.
Humidifier PID Run Rate (HM.TM)
This is the PID run time rate.
Humidifier Proportional Gain (HM.P)
This configuration is the PID Proportional Gain.
Humidifier Integral Gain (HM.I)
This configuration is the PID Integral Gain.
Humidifier Derivative Gain (HM.D)
This configuration is the PID Derivative Gain.
Table 58 —
Humidity Configuration
Table 59 —
Related Humidity Points
ITEM
EXPANSION
RANGE
UNITS
CCN POINT
DEFAULT
HUMD
HUMIDITY CONFIGURATION
HM.CF
Humidifier Control Cfg.
0 to 4
HUMD_CFG
0
HM.SP
Humidifier Setpoint
0 to 100
%
HUSP
40
H.PID
HUMIDIFIER PID CONFIGS
HM.TM
Humidifier PID Run Rate
10 to 120
sec
HUMDRATE
30
HM.P
Humidifier Prop. Gain
0 to 5
HUMID_PG
1
HM.I
Humidifier Integral Gain
0 to 5
HUMID_IG
0.3
HM.D
Humidifier Deriv. Gain
0 to 5
HUMID_DG
0.3
ACT.C
HUMIDIFIER ACTUATOR CFGS
SN.1
Humd Serial Number 1
0 to 9999
HUMD_SN1
0
SN.2
Humd Serial Number 2
0 to 6
HUMD_SN2
0
SN.3
Humd Serial Number 3
0 to 9999
HUMD_SN3
0
SN.4
Humd Serial Number 4
0 to 254
HUMD_SN4
0
C.A.LM
Humd Ctrl Angle Lo Limit
0-90
HUMDCALM
85
ITEM
EXPANSION
UNITS
CCN POINT
WRITE STATUS
Config
UNIT
SENS
SRH.S
Space Air RH Sensor
SPRHSENS
Config
UNIT
SENS
RRH.S
Return Air RH Sensor
RARHSENS
Config
UNIT
SENS
MRH.S
Mixed Air RH Sensor
MARHSENS
Inputs
REL.H
RA.RH
Return Air Rel. Humidity
%
RARH
forcible
Inputs
REL.H
SP.RH
Space Relative Humidity
%
SPRH
forcible
Inputs
REL.H
MA.RH
Mixed Air Relative Humidity
%
MARH
forcible
Outputs
ACTU
HMD.P
Humidifier Act.Curr.Pos.
%
HUMDRPOS
Outputs
ACTU
HMD.C
Humidifier Command Pos.
%
HUMDCPOS
Outputs
GEN.O
HUM.R
Humidifier Relay
HUMIDRLY
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...