Nortec GS, Installation Manual

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Installation Nortec GS
2583703_EN_1608
5.9.2 Gas Connection Requirements
In addition to the requirements of the applicable national and local codes for gas connections, the fol -
lowing requirements must also be satisfied:
– A certified manual gas shutoff valve must be installed immediately upstream from the humidifier.
Refer to
Figure 23
.
– For gas inlet size and gas line size refer to Table 8 on page 19 .
– If black pipe is used, a sediment trap must also be installed immediately upstream from the humidifier.
IMPORTANT! To prevent rapid formation of rust in the stainless steel gas manifold inside the
unit, Nortec recommends the use of a stainless steel section of pipe at the gas connection to the
humidifier.
IMPORTANT! Route the gas line so that it does not obstruct access to any of the services to
the humidifier. On the compact unit, make sure that the maintenance access for the drain pump
is not obstructed.
– DO NOT use teflon tape on gas line pipe threads. A flexible sealant suitable for use with natural gas
and propane gas is recommended.
– All gas piping must be adequately supported to prevent any strain on the humidifier gas connection.
– Upon completion of the gas installation, perform the "Gas Leakage Test" described below.
5.9.3 Gas Leakage Test
DANGER!
Risk of explosion and fire!
Prevention: NEVER use an open flame to check for gas leaks. Risk of injury, death or property
damage. Use a commercial soap solution or a gas sniffer to check for leaks.
CAUTION!
Risk of damage to the gas valve!
Prevention: Before performing the leakage test described below, close the manual gas shutoff
valve at the humidifier to isolate the gas valve from system pressure. Failure to do so may dam -
age the gas valve, and will void warranty.
1. Close the manual gas shutoff valve at the humidifier.
2. Pressurize the gas supply line to a maximum of 14 in H2O (3.5 kPa), and test all gas connections
external to the humidifier for leaks using a commercial soap solution or a gas sniffer. Seal all leaks
before operating the humidifier.
3. After completing the leakage test, de-pressurize the gas supply line BEFORE opening the manual
gas shutoff valve.