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GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
AUTOMATIC DRAIN WATER TEMPERING
The GTS humidifier LX series is shipped with drain water tempering enabled.
This feature can be disabled in the Vapor-logic controller. When drain water
tempering is enabled, the following steps will take place to ensure drain water
is less than 140°F (60 °C):
1. Water greater than 140°F (60 °C) is detected in the drain assembly with a
temperature sensor.
2. Fill valves open, directing cool water to the drain port within the tank.
3. Hot and cold water mix in the tank near the drain port.
4. Drain port valve opens and sends tempered water to the drain manifold.
5. The Vapor-logic controller controls the drain and fill valves using input
from the drain temperature sensor to enable closed-loop control of drain
water temperature, thus ensuring it does not exceed 140°F (60°C) while
minimizing water usage.
SUPPLY WATER CONNECTIONS
Regardless of the type of water used, the following general instructions MUST
be followed:
• There is one water connection to the humidifier. Water is connected in the
field to the fill water manifold. The fill water manifold provides water to the
humidifier tank and to the secondary heat exchanger. The water provided
to the tank is also used for tempering drain water.
• Make union connections at the humidifier on the make-up water supply and
drain/overflow lines.
• Provide a shutoff valve in the supply water line to isolate the humidifier from
the water system while servicing.
• A shock arrester, provided by installer, is required to reduce water hammer.
• A 2" (51 mm) air gap is provided in the humidifier tank to accommodate
skim and/or overflow protection and prevent water backflow.
• Note: Follow governing code requirements regarding size of drain pipe.
• Use insulating unions or bushings to make connections between copper and
other dissimilar metal fittings, such as galvanized steel. These insulating
fittings are required to minimize electrolytic corrosion, which results from the
direct connection of dissimilar metals in a water system.
• Before beginning ignition sequence of the humidifier at a new installation,
make sure the humidifier tank is full of water and the water is free to flow
into the tank.
• Do not use heated supply water. Using supply water over 90°F (32 °C) will
adversely effect the performance of the GTS humidifier LX series.
• Water inlet and outlet must be permanent pipe connections shown in Table
30-1. Do not connect with hose-sets or other non-permanent methods.
INSTALLATION
Supply water and drain overflow connections
Piping:
