Viconics VT8300 Low Voltage User Interface Guide - Manual (Page 25)

25 VT8300 Series User Interface Guide
Viconics Technologies Inc. | 9245 Langelier Blvd. | St.-Leonard | Quebec | Canada | H1P 3K9 | Tel: (514) 321-5660 | Fax: (514) 321-4150
028-0427-01 www.viconics.com | [email protected] November 2014
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PARAMETER DETAILS SCREEN 5/7
Configuration Parameters Default Value Significance and Adjustments
Pipe no.
Default value: 4 pipes Pipe Setting Type Installed
Defines type of system installed.
2 Pipes: limits number of sequences of operation available from
0 - 4. It also enables heat/cool operation from the same output.
4 Pipes: can access all sequences of operation from 0 - 2. Also enables
heat/cool operation from different output.
Seq. operation
Default value: Sequence #1 Sequence Operation
Selects initial sequence of operation required by installation type and
application.
System Modes System = 2 Pipes System = 4 Pipes
Off - Cool 0 = Cooling Only 0 = Cooling Only
Off - Heat 1 = Heating Only 1 = Heating Only
Off - Auto - Heat -
Cool
2 = Cooling With
Electric Reheat
2 = Cooling With
Electric Reheat
Off - Heat 3 = Heating With
Electric Reheat
3 = Heating With
Electric Reheat
Off - Auto - Heat -
Cool N/A
4 = Cooling and
Heating (2 modulating
outputs)
Off - Auto - Heat -
Cool N/A
5 = Cooling/Heating
(2 modulating out-
puts) with reheat
For 2 Pipe output applications, the system is
limited if configured for local changeover COS,
COC/NC or COC/NC. The current water tem-
perature detected by the RU1 then limits the
system mode available for the local configura-
tion or network write.
For Sequence 2 and 3, set PulsedHt to On to
enable pulsed electric reheat applications with
VT8300B and VT8300E
Purge Sample
Default value: 2 hours Purge Sample
Time interval between valve samples. Opens valve for a short period ad-
justed by Purge open parameter to sample pipe temperature to decide
between heating or cooling mode.
Adjustable for 0 to 4 hours (0 = disable).
Purge Open
Default value: 2 minutes Purge Open
Time valve opens to sample pipe temperature to decide between heating
or cooling mode.
Adjustable for 1 to 3 minutes.