Nortec GS - Installation as a Category IV Appliance

48 Installation
2583703_EN_1608 Nortec GS
5.8.2.1 Installation as a Category IV Appliance
The following requirements must be satised when the Nortec GS (CS/NX model) humidier is installed
as a Category IV appliance:
– Category IV appliances can be vented vertically or horizontally, and can terminate on a rooftop or
sidewall provided they meet the requirements of the National Fuel Gas Code (ANSI Z223.1), or
CAN/CGA B149 Installation Codes. Refer to Figure 20 on page 45 and Figure 21 on page 46. Adhere
to vent manufacturer's instructions.
– Refer to Table 16 on page 44 for exhaust vent diameters for this type of installation. The vent diameter
must remain uniform over the entire run.
– The Nortec GS (CS/NX model) humidier can be installed with type BH or plastic vents. Plastic pipe
(CPVC certied to ULC-S636) is preferred. Type BH vent, if used, must be UL or UL/CSA-listed.
Note: The Nortec GS 50-CS/NX must only use CPVC plastic pipe.
– The recommended manufacturer for CPVC plastic pipe is IPEX Inc.
– The following is a list of recommended stainless steel type BH vent manufacturers:
a. Flex-L International Inc.
b. FasNSeal
c. Heat-Fab Inc.
d. Z-Flex
– The exhaust vent must not connect to a common vent that is shared with any other natural gas ap-
pliance or power-assist appliance.
– The exhaust vent must not share a chimney ue servicing an appliance designed to burn solid fuel.
– All joints must be sealed using a sealant recommended by the vent manufacturer.
– The exhaust vent must have a minimum equivalent length of 10 ft (3 m), and must not exceed an
equivalent length of 100 ft (30 m), except for the Nortec GS 50 using propane gas which is limited
to 50 ft (15 m). The pipe diameter must remain uniform over the entire run. The vent run should be
as direct as possible with no more than six elbows in the system. Each 90° elbow is equivalent to
10 ft (3 m), and each 45° elbow is equivalent to 5 ft (1.5 m) of straight pipe.
– Exhaust vents used in sealed combustion applications must not exceed an equivalent length of 100 ft
(30 m), except for the Nortec GS 50 using propane gas which is limited to 50 ft (15 m).
– The maximum operating ue temperature is 160ºF (71°C). Normal operating range is 120-140ºF
(49-60°C).
– During normal operation, a Category IV appliance will create exhaust condensate. Install condensate
drain lines according to vent manufacturer's instructions every 15 ft (4.5 m) on all horizontal runs,
and at every horizontal-to-vertical transition. Install a full "Tee" with condensate port and trap at all
horizontal-to-vertical transitions. The condensate trap must be minimum 12 in (300 mm) in diameter.
Refer to Figure 20 on page 45 or Figure 21 on page 46. Install condensate neutralizer, if required by
local code.