OMEGA | WATER SOURCE HEAT PUMPS
OMEGA-VSHP.G-IOM-2103
11
Optional Whisper Mode - Fan Speed Set by Thermo-
stat
With optional Whisper Mode DIP Switch #6 is set to
(ON) Auto. During a call for heating or cooling, fan
speed will be determined by the thermostat fan wiring to
the G2 or G3 terminals:
G1 Signal = Whisper Mode Only
G2 Signal = MEDIUM fan speed enabled.
G3 Signal = HIGH fan speed enabled.
SEQUENCE OF OPERATION
Call for Heating and Cooling
When a compressor request is made, the optional mo-
torized auto shut-off control valve will open. The com-
pressor contactor will then be energized so long as none
of the following fault conditions are present:
•
High-Pressure Alarm
•
Low-Pressure Alarm
•
Condensate Over Flow Alarm
•
Compressor Anti-Short Cycle 7 min. timer has not
expired
•
Entering Water Temperature is greater than 115
o
F
•
Leaving Water Temperature greater than 127
o
F
When call for compressor request is terminated, the
optional motorized auto shut-off control valve and the
blower fan will remain open for an additional 3 minutes.
Low-Pressure Bypass
During a call for compressor, the low-pressure switch is
bypassed for the first 2 minutes of compressor operation
to prevent nuisance low-pressure start-ups.
Timers and Interlocks
Microprocessor board utilizes a number of timers and
interlocks in the control sequence of the unit.
Anti-Short Cycle Timer
The compressor anti-short cycle timer of 7 minutes
starts every time a call for compressor is terminated to
prevent compressor over cycling.
Fan-On Timer
The Fan-On timer of 3 minutes starts anytime there is a
call for fan request.
Fan-Off Timer
The Fan-Off timer of 3 minutes starts anytime a call for
compressor is terminated to ensure fan runs for a period
of 3 minutes after the compressor turns off.
Valve Open Timer
The valve open timer of 1 minutes starts anytime a fan
and compressor request are made to develop flow in the
water coil.
Valve Closed Timer
The valve closed timer of 1 minutes starts anytime a call
for compressor is terminated to allow for flushing of the
water coil.
Random Wait Time on Unit Power Up
Microprocessor controller uses a random wait time dur-
ing unit start up between 1-30 seconds.
9. TROUBLESHOOTING
Refer to the ‘Troubleshooting Guide’ for identifying com-
mon issues and possible resolutions. The microproces-
sor control board has a number of LED lights for simple
identification of common alarms and faults. Refer to
’LED Code Table Guide’.
TEST MODE
A Test mode feature can be enabled in order to perform
diagnostic testing of the unit.
To enable test mode temporarily jumper “DI1” pins on
the microprocessor board. The unit will operate in test
mode.
Unit status and diagnostics temperature (Supply Air,
Entering Water, Leaving Water and Suction Tempera-
ture) readings can be easily accessed using the Web
Browser based tool as described in the following ‘Web
Browser Access’ section.
WEB BROWSER ACCESS
The Omega controller features a webpage configuration
and troubleshooting tool. The imbedded webpage is
accessed by connecting to the control board, no internet
connection required. There are two ways to connect:
using a mini-wireless router or directly to a laptop. Wire-
less router is the preferred method for fewer configura-
tion steps and works with Tablets or smartphones.
Wireless Router Method
1. To connect to the controller you will need the follow-
ing: Ethernet cable, Laptop/Tablet, and wireless router
(e.g. TP Link TL-WR802N, shown below). Configure
routers as per manufacturer instructions. Setup as Ac-
cess point with Static IP (leave IP address blank).
