Installation guide

Page 14 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual
Outdoor enclosure mounting
Before you begin
• Prior to installing the unit, remove all packaging.
• During the transit, unloading, and setting of the unit, bolts and
nuts may become loose. Check that all nuts are tightened as
required.
• There are three knockouts located on the right and left side of the
enclosure. DRI-STEEM recommends running electrical power
into the enclosure at these knockouts.
• When pad-mounted or when the pipe chase cannot be used, the
supply water and drain piping can be run through the knockouts,
although preferably on the opposite side from the gas and
electric.
• When unit is mounted on an outdoor curb, there must be a
gasket between the top of the curb and the base surface of the
unit to prevent moisture from leaking into the building from
either driving rain or melting snow.
• The outdoor enclosure has two available steam distribution
configurations. The standard configuration has a steam outlet
at the back of the outdoor enclosure for connecting to steam
dispersion unit piping. The optional internal steam distribution
configuration routes steam within the outdoor enclosure and
down through the pipe chase into a building. See drawings on
Pages 15 and 16.
Important: A pipe chase is located inside the burner section
of the enclosure. DRI-STEEM recommends using this pipe chase
for both the supply water piping and drain piping. Use insulation
to completely fill the area around the pipes to maintain proper
enclosure pressure and protect unit components from elevated
moisture levels within building; insulation must serve as an
effective vapor barrier. Use the provided pipe chase cover to seal
off the pipe chase. Cut necessary holes and seal after installation.
• The heater package has two thermostat-controlled heaters:
one strip heater is located in the control section, and one strip
heater is located in the burner section to keep the enclosure at
a constant minimum temperature. Once the humidifier tank is
full and up to temperature, the tank will keep the enclosure at an
appropriate temperature. The heaters will turn off.
• Refer to the wiring and piping subsections, beginnning on page
19 of this manual for directions on installing electrical, gas,
flue, drain, and water connections. A separate electrical service
connection for the outdoor GTS is recommended. Insulation
and/or heat taping of water piping is recommended.
Installation