Viconics H263 User Manual
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TABLE 1: H263 HUMIDISTAT PROGRAMMING TOOL
CODE
VALUES
DEFAULT
VALUE
DESCRIPTION
Db
0 to 40 % R.H.
25% R.H.
Dead Band between humidification and dehumidification.
SL
30 to 100 % R.H.
85% R.H.
Supply Limitation: High humidity limit in the supply duct (H270 only)
d2
0 to 199 % (of proportional
band)
100%
Differential for output #2": Shift for output 2 relative to output 1
Pb
0 = 1.6 % R.H.
1 = 3.2 % R.H.
2 = 6.4 % R.H.
3 = 12.8 % R.H.
4 = 25.6 % R.H.
2= 6.4%
R.H.
Proportional Band
o1
0 = Humidification
1 = Dehumidification
"Output #1" Action for output no 1
o2
0 = Humidification
1 = Dehumidification
"Output #2" Action for output no 2
cc
2 = Without integral
3 = With integral
3
"Control Code"
t1
0 = On/off
1 = 8 minutes
2 = 1 second
"Time #1" Time period for output no 1
t2
0 = On/off
1 = 8 minutes
2 = 1 second
"Time #2" Time period for output no. 2
rA
0 = °C
1 = °F
1 DO NOT
CHANGE
"Range" Temperature Scale
Ca
± 13 %
Calibration ( deviation mode: DO NOT MODIFY: USE AUTOCAL PROCEDURE;
FOR H100 TRANSMITTER, USE THE ZERO POTENTIOMETER ON THE
TRANSMITTER.
hA
0 à 127
"Hardware assembly" Code related to thermostat model and entered at initial setup
at the factory.
it
1 to 99 = 1 TO 99 MINUTES
60
"Integral time" Error integration time.
Lt
-40 à +40 °C (-40 à 105 °F)
-20 °F
"Lower temperature" minimum outside temperature for setpoint reset (model H270
only)
Ht
-40 à +40 °C (-40 à 105 °F)
32 °F
"Higher temperature" maximum outside temperature for setpoint reset (model H270
only)
rE
1 à 99 % R.H.
20 % R.H.
"Reset” Minimum humidity value ( % HR ) (model H270 only)
Example: rE = 20%. Humidity setpoint will be reset from selected setpoint to 20%,
from Ht to Lt
AIR SUPPLY HIGH LIMIT HUMIDITY SENSOR
The H270 includes a high limit circuit. This allows the use of a second
humidity sensor to limit the humidity in the supply air. Input signal goes to
terminals #8 on the humidistat. High limit setpoint is preprogrammed at 85%
(parameter SL). It can be readjusted using the H263 service tool.
If you don’t use the high limit feature, connect a 4.7 Meg
Ω, ¼ watt resistor
between terminals 8 and 10 (supplied with the humidistat.)
Remember: this high limit function is not a safety device. For critical
situations, provide installation with normal protections required to ensure a
safe operation.
Proportional high limit override signal.
AUTOCAL PROCEDURE
The programmer is not needed to calibrate the humidistat. Follow instructions below:
1.
Measure the room humidity near the Viconics humidistat with an accurate hygrometer.
2. Turn the humidistat set point dial to match the reading of the hygrometer.
Push and hold the Autocal button for more than 3 seconds or until the internal red light turns On and Off.
Be careful when recalibrating the H270. Since the outdoor temperature resets the setpoint, the displayed value on the programmer
may be different from the adjusted setpoint. To avoid confusion, put a jumper across the sensor (pins 6 and 9) before doing
calibration. Calibrate the humidistat; then remove the jumper.
Viconics Electronics Inc.
9245, Langelier Blvd, St-Leonard, Quebec, Canada H1P 3K9
www.viconics.com
LIT-H263E-E02.doc
SUPPLY HUMIDITY
100%
0%
50%
CO
N
T
RO
L O
U
T
P
UT
L
E
V
E
L
85%