LX and LT Low NOx Pool/Spa Heater Page 11
correct part number of the manifold kit needed.
When changing the altitude range of the heater,
be sure to fill out the altitude conversion label,
included in the kit. Apply the label on the inner
panel of the heater, next to the original rating
plate.
CAUTION
Permanent damage to the gas valve will occur
if the following procedures are not followed.
ATTENTION
Vous endommagerez la soupape de gaz si
vous ne respectez pas les procédures
suivantes.
3. Use the figures in Table 5 to size the gas inlet
piping from the gas meter to the heater. Check
all local codes for compliance before installing
the heater.
3.3.3 Inspection and Replacement of
Existing Vent System with New
Components
If the LX/LT is being installed to replace an
existing pool heater, it is recommended that a new
appropriate venting system be installed with the new
heater. However, if an existing venting system must be
used, be sure to carefully inspect the venting system to
ensure that it is in good condition and continues to be
appropriate for the LX/LT heater. Replace any parts
that are not in good and serviceable condition with new
parts before completing the pool heater installation.
SECTION 4.
Gas Connections
4.1 Gas Supply and Piping
Review the following general instructions before
continuing the installation.
WARNING
The LX and LT Low-NOx pool and spa heaters
are designed for use with either natural gas or
LP gas. Check the rating plate on the inner
panel to be sure that the heater is designed to
use the type of gas being supplied. DO NOT
ATTEMPT TO CONVERT THIS HEATER
FOR USE WITH ANY OTHER TYPE OF
FUEL.
AVERTISSEMENT
Les appareils de chauffage à faibles émissions
NOx LX et LT pour piscines et cuves thermales
sont conçus pour être utilisés avec du gaz
naturel ou du gaz de pétrole liquéfié (GPL).
Vérifiez l’information inscrite sur la plaque
signalétique du panneau intérieur pour vous
assurer que l’appareil est conçu pour le type de
gaz fourni. NE PAS ESSAYER DE
CONVERTIR CET APPAREIL À UN AUTRE
TYPE DE GAZ.
1. Gas piping installation must be in accordance
with the latest edition of ANSI Z223.1 and all
local codes. In Canada, the installation must be in
accordance with CAN/CSA B149.1 and all local
codes that apply.
2. Check the gas supply to be sure that it is the
same as the gas indicated on the heater's rating
plate. LX and LT Low NOx heaters, as shipped
from the factory, are certified to operate within
the altitude range indicated on the rating plate. If
a field conversion to a different altitude range
should be necessary, manifold kits are available
for changing the altitude range of the heater. See
Table 1 on page 4 of this manual to determine the
correct altitude designation for your heater.
Refer to Section 11 "Parts List" to order the
Table 5. Supply Gas Pipe Size Requirements*
Distance from Gas Meter
0-50 feet 50-100 feet 100-200 feet
Heater (0-15 m) (15-30 m) (30-60 m)
Size in. (mm) in. (mm) in. (mm)
250 1 (25) 1-1/4 (32) 1-1/4 (32)
400 1-1/4 (32) 1-1/2 (38) 1-1/2 (38)
Notes:
1. These numbers are for natural gas (0.65 Sp. Gr.) and are
based on 1/2 inch (3.45 kPa) water column pressure
drop. Check supply pressure with a manometer, and
local code requirements for variations. For LP gas,
reduce pipe diameter by one size, but maintain a
minimum 3/4 " diameter.
2. Check supply pressure and local code requirements
before proceeding with work.
3. Pipe fittings must be considered when determining gas
pipe sizing.
*
Figure 9. Proper Design for a Sediment Trap/Drip Leg
APPROVED
4. Install a sediment trap (drip leg) ahead of the gas
controls (see Figure 9). Fit the trap with a
threaded cap which can be removed for cleaning.
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