557
HUMIDITY
HUMIDITY
9
WE MAKE IT EASY.
kele.com 888-397-5353 USA
March 2014
3% HUMIDISTATS
VH7200 SERIES
ORDERING INFORMATION
DESCRIPTION
The Viconics VH7200 Series Humidistats are designed for
controlling humidification and dehumidification equipment
in HVAC and energy management systems. The humidistat
utilizes a PI time proportional control algorithm to accurately
control relative humidity. The VH7200 Series features
adjustable control setpoint, and the ability to set the maximum
number of output cycles from 3 to 8 per hour. Units accept a
remote outdoor air temperature sensor which can be used to
reset the humidity set point-minimizing energy consumption
and condensation on windows and building structures. The
high limit protection (available only on Model VH7270 when
used with a remote humidity sensor) prevents damage due to
over-humidification.
FEATURES
• Designer wall mounting
• 3% RH control accuracy
• Two status LEDs
• Proportional high limit override eliminates
condensation problems
• Sensor failure protection
• Outdoor temperature reset
• Keypad lockout
• Backlit LCD two line display
MODEL DESCRIPTION
VH7200A1000 Humidistat, on/off (humidify), on/off (dehumidify)
VH7270F1000 Humidistat, 0-10 VDC (humidify), on/off (dehumidify)
VH7270K1000 Humidistat, 0-10 VDC and on/off (humidify), on/off (dehumidify)
Accuracy ±5% RH (20-100% RH) @ 50°F° to
90°F (10°C to 32°C)
Supply Voltage 19-30 VAC, 50/60 Hz; 2 VA
Signal Output 0-10 VDC, 2 kΩ minimum load
impedance
Relay Output 1A continuous, 3A in-rush maximum
@ 30 VAC
Setpoint Range Humidification 10 to 90% RH
Dehumidification 15 to 95% RH
Binary Inputs Relay dry contact
Sensing Technology Bulk polymer
Display Two line, 16 character LCD
Resolution Humidity 0.1% Temperature ± 0.2°F
(±0.1°C)
Operating Humidity 0 to 95% RH non-condensing
Operating Temperature 32° to 122°F (0° to 50°C)
Temperature Range Outdoor Air: -40° to 122°F
(-40° to 50°C)
Enclosure ABS plastic
Wiring Terminations Screw terminals
Dimensions 4.9"H x 3.4"W x 1.1"D
(12.4 x 8.6 x 2.8 cm)
Approvals UL File E27734, CSA, CE
Weight 0.5 lb (0.23 Kg)
Warranty 1 year
SPECIFICATIONS
On/Off Humidification
On/Off Humidification
24 VacCom.
24 VAC Hot
DEH
HUM
R
HUM
C
On/Off Dehumidification
On/Off Dehumidification
DEH
VH7270K1000
Universal
HL
Digitalinput,dry contact to “Scom”
Remote humidity sensor (0-10 VDC)
Analog 0-10 VDC Humidification
DI1 OSHS
Scom
Outsideair temperature sensor (thermistor)
Sensor(s)and BI inputcommon
Supply Humidity High Limit Sensor (0-10 VDC)
HUM
0-10
WIRING
RELATED PRODUCTS PAGE
691-K0A Control transformer, 120:24 VAC, 40 VA, Class 2 979
HD20K 2% duct-mount humidity sensor 511
KHD2 2% duct mount humidity transmitter, 4-20 mA output 509
KTO24 OSA thermistor sensor, Type 2, model 24, ±0.5°F (0.28°C) 1216
ST-O24 OSA thermistor sensor, Type 2, model 24, ±0.36°F (0.20°C) 1217
(63 paginas)
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