Nortec GS - Page 25

19Installation
Nortec GS
2583703_EN_1608
Drainage
 The humidier should be connected to a dedicated building drain (recommended) with a minimum
drainage rate of 5.3 gpm (20 L/min). The drain line must allow free and easy drainage.
 The building drain pipe should be made of either copper or stainless steel (minimum DIN 1.4301) to
handle discharge water at up to 212 °F (100 °C).
 The space in which the humidier is to be installed should have a oor drain connected to the build-
ing drain. However, if a oor drain is not available, a leakage monitoring device must be supplied
to permit interruption of the water supply in case of a leakage. A drain pan is also recommended to
prevent property damage.
Combustion Air
 The space in which the humidier is to be installed must have access to a good supply of clean
combustion air at atmosheric pressure. Adhere to appropriate local and national installation regula-
tions for sealed combustion and space air installations.
 The maximum temperature of the combustion air supply should be 86°F (30°C).
 For additional requirements for sealed combustion and space air installations refer to "Combustion Air
Connection" on page 40.
Exhaust Venting
 The space in which the humidier is to be installed must permit routing of exhaust air to the outside.
Adhere to all local and national installation regulations.
 For additional requirements for the different types of exhaust vent installations refer to "Exhaust Vent
Connection" on page 43.
Gas Supply
 Gas supply to the unit must be equipped with a certied manual gas shutoff valve located in the
immediate vicinity of the humidier.
 If black pipe is used, a sediment trap (located between the manual shutoff valve and the unit) must
also be supplied.
 A capped 1/8 in NPT test port must be supplied in the gas line immediately upstream from the hu-
midier gas connection.
 A union tting must be supplied in the gas line immediately upsteam from the humidier gas connection.
 The operating pressure of the gas supply to the humidier must be as listed in Table 7.
Table 7: Gas Operating Pressure
Gas Type Operating Pressure
Minimum Maximum
Natural gas (North America) 5 in H2O (1.25 kPa) 10.0 in H2O (2.49 kPa)
Propane (North America) 9.0 in H2O (2.24 kPa) 14.0 in H2O (3.49 kPa)
 The gas supply line must be sized as listed in Table 8. The pipe connection should have male NPT
threads.
Table 8: Gas Line Size
Model Minimum Gas Line Size Gas Inlet Size (Female)
GS 50 1/2 in (15 mm) 1/2 in NPT
GS 100 1/2 in (15 mm) 1/2 in NPT
GS 150 3/4 in (20 mm) 3/4 in NPT
GS 200 1 in (25 mm) 1 in NPT
GS 300 1 in (25 mm) 1 in NPT
GS 450 1-1/4 in (32 mm) 1 in NPT
GS 600 1-1/4 in (32 mm) 1 in NPT