Exhaust Vent Connection; General Requirements - Nortec GS Installation Manual

5.8

Exhaust Vent Connection

The Nortec GS humidifier (CS/NX model) must be installed as Category IV appliances. The general
requirements, and the different exhaust venting types are discussed in
Other requirements are listed in
5.8.1

General Requirements

The exhaust vent system used with the Nortec GS series humidifier must satisfy the following requirements:
– The exhaust vent systems shall be certified to UL or UL/CSA standard, and meet the installation
requirements in Part 7 (Venting of Equipment) of the National Fuel Gas Code (ANSI Z223.1) in the
USA, or Section 7 (Venting Systems and Air Supply for Appliances) of the CAN/CGA B149 Installation
Codes in Canada, or applicable provisions of the local building codes. Any local regulations related
to exhaust venting systems must also be adhered to.
– In applying the codes, refer to the vent system manufacturer's instructions, the local gas supplier
regulations, and the specific instructions in this manual.
– This appliance must be installed in compliance with national regulations and codes. The installation
must only be performed by a qualified technician who is well versed with these codes and the local
requirements of the jurisdiction.
– Proper removal of combustion gases must be assured, and building materials must be protected
from degradation by flue gases.
– Never mix venting types. Never use two different manufacturer's equipment for the same exhaust vent.
– The exhaust vent run should be as direct as possible, with no more than six elbows in the system.
– All horizontal exhaust vent runs must maintain a constant minimum upslope of 2° to prevent ac-
cumulation of condensate.
– When an exhaust vent run exceeds 20 ft (6.1 m), insulate the exhaust vent pipe to reduce the amount
of condensate that could form in the flue gases.
– When an exhaust vent passes through a cold area or a location that has large amounts of air flow
over the vent, insulate the exhaust vent pipe to prevent condensation inside the vent.
– When an exhaust vent passes through walls, floors, and ceilings, proper clearances must be main-
tained around combustible materials and venting manufacturer's fire stop equipment.
– The exhaust vent shall not pass through any air circulation duct or plenum.
WARNING!
Risk of severe burns from contact with hot exhaust vent!
Prevention: Install a screen or barrier around the exhaust vent to prevent contact with it.
– Exhaust condensate management is required on all Nortec GS (CS and NX models) installations.
Refer to "Exhaust Vent Installation (CS/NX Model)" on page
IMPORTANT! Before starting up the unit, prime all condensate traps with water.
– Never vent into an unlined masonry or concrete chimney unless the chimney is sized and installed
according to the provisions of the national fuel code in the USA (ANSI Z223.1) or the Canadian
standards (CSA B149).
– A chimney or exhaust vent should extend at least 3 ft (1 m) above the roof, and at least 2 ft (0.6 m)
above any ridge within 10 ft (3 m) of the chimney. Local codes apply.
– The exhaust vent must terminate at a sufficient height above the roof to prevent blockage due to
accumulation of snow.
– The exhaust vent must be secured with hangers or pipe straps. All horizontal runs must be adequately
supported with hangers or straps to prevent sagging.
Nortec GS
"Exhaust Vent Installation (CS/NX Model)" on page
47.
2583703_EN_1608
"General Requirements".
47.
Installation
43