57
GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
START-UP PROCEDURE
1. Refer to the
Vapor-logic Installation and Operation Manual
, and verify that
the installer has followed the Pre-installation Checklist (including proper
wiring).
2. Prime the condensate p-trap at the base of the secondary heat exchanger.
3. Follow the “Start-up commissioning checklist” on Pages 58 and 59 of
this manual.
• Note: During start-up, do not leave the humidifier unattended.
4. Monitor oxygen levels and adjust if out of range. Desired oxygen range is
5.5% ±1.0% at 100%. To adjust oxygen levels turn the gas valve throttle
screw clockwise to increase oxygen and turn counterclockwise to decrease
oxygen levels.
For complete operating instructions, read and follow the instructions in the
“Operation” section of the
Vapor-logic Installation and Operation Manual
.
Start-up
OPERATION
Systems and safeguards
The GTS humidifier has a number of systems
and safeguards to ensure proper operation.
• When there is a call for humidity, all of
the combustion blowers must start. Each
combustion blower sends a signal to the
microprocessor relaying its current speed. If
this actual speed is outside an acceptable
range, the GTS will not operate.
• The negative pressure gas valves used on the
GTS are designed to keep a constant ratio of
air and gas throughout the operating range
of the blower. If the flue becomes blocked
or the blower fails to run, the blocked flue
sensor will shut down the humidifier.
• During operation, the water level in the tank
is monitored by a probe system that ties into
the Vapor-logic controller. If the water level
drops below a safe point, the controller
turns the burners off and tries to refill the
tank. If humidifier is unable to fill within a
defined time period, an “Excessive refill
time” alert appears in the Vapor-logic Alert
Log. The burners will remain off until this
alert is cleared. (For more about alerts, see
the
Vapor-logic Installation and Operation
Manual
.)
• Low water conditions are redundantly
identified by a temperature sensor/
switch located inside the tank. This
sensor/switch is utilized by the Vapor-
logic controller and is additionally tied
directly into the power source for the gas
valves. If this system detects an elevated
temperature condition, the humidifier
shuts down until the alert is cleared from
the Vapor-logic Alert Log.
• In addition to monitoring the water level,
there is a temperature sensor located near
the top of the heat exchanger. If the water
level drops too low and both the main and
redundant low water sensors fail to detect
it, the temperature sensor shuts down the
humidifier before an unsafe condition occurs.
OM-7945
Gas valve
Vacuum reference signal
FIGURE 57-1: DETAIL OF GAS VALVE
Gas valve
power plug
Throttle
screw
Top view
Gas pressure
diagnostic port
