HEVAC AWEC 5 Channel Fan Speed Controller User Manual
- June 1, 2024
- HEVAC
Table of Contents
HEVAC AWEC 5 Channel Fan Speed Controller
AWEC SERIES EC FAN AUTO/MANUAL MODULES
- Made in Australia to Australian Standards.
- Multiple I/O versions: single, 3 way & 5 way.
- Auto / Manual inputs can be looped to other 24vAC relays etc.
- The manual potentiometer can adjust the output from 0-10vDC.
- Potential Free (24v 1Amp max.) SPST Fan Enable Relay Output is selectable for use in manual mode only or when both manual or auto input are selected.
- AWEC-5 has five I/O cards + an additional adjustable DC power supply
- Optional additional 0-10vdc controlled relay card also available
- Din rail mounts low profile.
APPLICATION
The AWEC modules are intended for use as a low-cost alternative to traditional plug-in relays & potentiometers for Auto/Off/Manual EC fan speed interlocks & control. The device is available in 3 versions – a Single output module AWEC-1, AWEC-3 (3 I/O cards only), & a 5-output version AWEC-5 c/w an adjustable DC power supply card. Two 24v active Inputs set each card to output either a manually adjustable 0-10vdc output (set using the onboard potentiometer/s) or to pass out the 0-10vdc signal/s from an external control device ie BMS EC fan speed control outputs.
The AWEC5 version also comes with an optional use adjustable DC power supply card that can be used either as a local common 10vdc power supply to power the five onboard manual potentiometers or as a common preset voltage that can be used as a DC signal source to set the fan speed in the D2 input mode (instead of signals from an external source) ie 2 speed low/high (adjustable) speed selection (as selected by the external switch). The potentiometer shaft/ knob can be removed by exposing only a hexagonal hole to decrease the ability to tamper post-commissioning manual fan speed settings.
TERMINAL LEGEND
- A” FITTED = MANUAL OR AUTO FAN ENABLE
- “A” NOT FITTED = MANUAL FAN ENABLE ONLY
THE AWEC-1 & 3 NEEDS AN EXTERNALLY SUPPLIED 10vDC SUPPLY FOR THE ONBOARD MANUAL SPEED SETTING POTENTIOMETER, IF THE EC FAN DOESN’T INCLUDE A 10vDC SUPPLY, A LOW COST 10VDC POWER SUPPLY CAN BE PURCHASED FROM HEVAC.
GO 24v NEUTRAL
- D1 24v ACTIVE to energise relay 1 (Manual)
- D2 24v ACTIVE to energise relay 2 (Auto)
- Q1 & Q2 Auxiliary SPST N/O contacts
- X External 0-10vdc input
- 0 EC Fan & potentiometer DC ground interlock
- Y EC Fan 0-10Vdc output control interlock
- 10 Potentiometer 10vDC supply input from EC fan or external power supply.
DIMENSIONS
USE & CONNECTION EXAMPLES
BASIC EC FAN SPEED CONTROL WITH VARIABLE EXTERNAL CONTROL INPUT & MANUAL SPEED SELECTION VIA 3 POSITION SWITCHBOARD SWITCH. EC FAN SPEED CONTROL WITH VARIABLE EXTERNAL INPUT & MANUAL SPEED VIA SWBD SWITCH C/W FAN RUN RELAY ENABLE OUTPUT. WITH EITHER ONLY MANUAL MODE ENABLING FAN OR BOTH AUTO & MANUAL ENABLING FAN.
EXAMPLE DETAIL OF (PART) AWEC-5 5 OUTPUT VERSION SHOWING
OPTIONAL USE OF ONBOARD ADJUSTABLE DC POWER SUPPLY CARD.
EXAMPLE: USED IN CONJUNCTION WITH ENDEAVOUR TEMPERATURE CONTROLLER.
TERMINAL 8 ON THE HEVAC ENDEAVOUR CONTROLLER IS THE TIME SWITCH OUTPUT,
TYPICALLY USED TO START & STOP THE SUPPLY AIR FAN. SHOWN IN THIS DRAWING
TERMINAL 8 IS CONNECTED TO THE NEW AWEC EC FAN MODULE VIA A SWITCHBOARD OR
FIELD-MOUNTED HIGH/LOW-SPEED SELECTOR SWITCH WHICH CAUSES THE SELECTED INPUT
TO CONTROL THE EC SPEED. THE Q1 & Q2 CONTACTS WILL CLOSE IN EITHER SELECTION
WITH THE “A” JUMPER FITTED.