Viconics VH7200 Series Engineering Guide Specifications - Manual (Page 2)

Engineering Guide Specs Viconics Electronics Inc
VH7200 Series Digital PI Humidity Controller June 2008
Document #028-8018-R00
• Humidistat shall have the following modes of operation that can be selected using the local keypad
(model dependant):
Off System is disabled
Auto System will satisfy both Humidification and Dehumidification setpoints
Humidification System will satisfy the Humidification setpoint only
Dehumidification System will satisfy Dehumidification setpoint only
• Humidistat shall have the ability to lockout the dehumidification sequence based on outside air
temperature from –40ºF up to 122ºF, -40ºC up to 50ºC (outdoor air temperature sensor required).
• Humidistat shall have the ability to lockout the humidification sequence based on outside air
temperature from –15ºF up to 120ºF, -26ºC up to 49ºC (outdoor air temperature sensor required).
• Humidistat shall have an adjustable maximum number of cycles per hour (under normal control
operation) for the output relay for dehumidification and humidification (for on/off models). The
adjustments range from 3 to 8 cycles per hour.
• Humidistat shall be supplied (without networking interface, BACnet MS_TP network interface, Echelon
Lontalk network interface, Zigbee wireless network interface). BACnet MS_TP versions shall be
provided with Protocol Implementation Conformance Statement or Lonmark approval disclosing all
object/SNVT properties and instance numbers to facilitate the integration process. Echelon-Lontalk
Communicating versions shall be provided with appropriate application files and LNS plug-in as
required free of charge from the manufacturer.
• Humidistat shall utilize EEPROM memory to back up local configuration parameters in the event of
power failure. Humidistats requiring batteries, or have no provisions for retention during loss of power
shall not be acceptable.
• Thermostat shall have two (2) adjustable keypad lockout levels limiting access as follows:
Access Level System Mode Changes Setpoint Adjustment
0 Yes access Yes access
1 No access No Access
• Humidistat shall have a programmable binary input that can be used for the following local monitoring
capabilities:
DI-1
1. None: No function will be associated with the input
2. Service: A backlit flashing “Service” alarm shall be displayed on the local
humidistat LCD screen when input is energized.
3. Canister: A backlit flashing “Canister” alarm shall be displayed on the local
humidistat LCD screen when input is energized. This input can be tied to a dry
contact output supplied by others.
.
• Humidistat shall be pre-programmed, containing all required I/O to accomplish local humidity control.
• Humidistat shall be provided with intelligent HMI, to which will display services only as are available
as switched through local digital input or network layer such as:
Outdoor air temperature display only enabled when outdoor air temperature sensor is
connected
COM Address and various other parameters when a communication module is
integrated inside the unit.
Humidistat with outdoor reset and proportional high limit shall be Viconics, model
VH7270x1000x
Humidistat with outdoor reset only shall be Viconics, model VH7200A1000x