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About this guide
This quick start guide provides the basic information you
need to configure and install the Verasys
Controller (VEC), LC-VEC100-0, using the Verasys generic
rooftop unit (RTU) heat pump controller application. The
application controls a third-party changeover bypass
(COBP) system or a third-party variable air volume (VAV)
unit.
For further information, refer to the Verasys Equipment
Controller (VEC) Installation Guide (24-10143-1272) and the
VEC100 Generic RTU Heat Pump Controller Application Note
(12013452).
Table 1: Application features
Options available Possible values
Number of Heat
0 to 2
Pump Stages
Installed
Supplemental Heat
•
State 0: No
Installed
•
State 1: Yes
Economizer
•
State 0: the economizer is not
Installed
available.
•
State 1: the economizer is available.
Air Proving Switch
•
State 0: fan status device
Setup
•
State 1: duct static pressure sensor
•
State 2: none
Runtime
•
State 0: heat pump activation is not
Equalization
based on runtime.
•
State 1: heat pump activation is based
on runtime.
Rooftop Controller
•
State 0: changeover bypass
Type
•
State 1: VAV
Cancel ASCD Timers •
State 0: false
•
State 1: true
Demand Ventilation
•
State 0: demand ventilation is off.
Feature
•
State 1: demand ventilation is on.
Reversing Valve
•
State 0: on for heating
Config
•
State 1: on for cooling
Condensate Alarm
•
State 0: the condensate alarm does
not shut down the system.
•
State 1: the condensate alarm shuts
down the whole system.
Mounting the controller
To mount the controller, complete the following steps:
1.
Mount a 20 cm (8 in.) section of 35 mm (1.3 in.) DIN
rail horizontally.
LC-VEC100-0
VEC100 Generic RTU Heat Pump Controller
Equipment
®
Figure 1: Pull down lower mounting clips
Figure 2: Push up lower mounting clips
Wiring the controller
Zone bus terminal block
The zone bus terminal block is a grey, removable, 4-
terminal plug that fits into a board-mounted jack. Wire the
removable zone bus terminal block plugs on the controller
on the top row of the stacked connector, and other field
controllers in a daisy-chain configuration using 3-wire
twisted, shielded cable as shown in the following figure.
Quick Start Guide
Note: Mount the controller in the horizontal
position.
2.
On the back of the controller, extend the two
mounting clips.
3.
Place the controller on the DIN rail.
4.
Push the bottom mounting clips inward (up) to
secure the controller on the DIN rail.
LIT-12013488
2021-07-14
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Related Manuals for Verasys VEC100
Summary of Contents for Verasys VEC100
- Page 1 (COBP) system or a third-party variable air volume (VAV) unit. For further information, refer to the Verasys Equipment Controller (VEC) Installation Guide (24-10143-1272) and the VEC100 Generic RTU Heat Pump Controller Application Note (12013452). Table 1: Application features Options available Possible values...
- Page 2 Press either the up or down arrow. The screen terminal can be used to connect (daisy chain) the 15 refreshes to the new address. VDC power leads on the sensor bus. VEC100 Generic RTU Heat Pump Controller Quick Start Guide...
-
Page 3: Configuring Sensors
Verasys Smart Building Hub (SBH) or the local display to configure the controller. To update the VEC with the heat pump application, complete the following steps: Go to verasyscontrols.com, and log in with your credentials. VEC100 Generic RTU Heat Pump Controller Quick Start Guide... - Page 4 COBP wiring diagram Figure 6: Changeover bypass wiring diagram - VEC100 VEC100 Generic RTU Heat Pump Controller Quick Start Guide...
- Page 5 Outside air temperature sensor OA-T Supply fan command (to fan VFD) SF-C Note: This is a required sensor if the VEC100 Compressor stage 1 command COMP1-C controls the economizer. Position the sensor in a shaded area on the north side of the...
- Page 6 VAV wiring diagram Figure 7: VAV wiring diagram - VEC100 VEC100 Generic RTU Heat Pump Controller Quick Start Guide...
-
Page 7: Commissioning The System
Adjustable Changeover Bypass 0 = Changeover Bypass 1 = VAV Variable Speed Drive Sets whether the VEC100 controls a VFD fan instead of a bypass Adjustable False 0 = False damper when the rooftop controller type is set to changeover 1 = True bypass. -
Page 8: Product Warranty
Product warranty This product is covered by a limited warranty, details of which can be found at www.johnsoncontrols.com/ buildingswarranty. Software terms Use of the software that is in (or constitutes) this product, or access to the cloud, or hosted services applicable to this product, if any, is subject to applicable end-user license, open-source software information, and other terms set forth at www.johnsoncontrols.com/techterms.
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