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Page 12
ENGLISH
and combustion air are essential for the safe and
efficient operation of the heater, see Section 3. An
approved draft hood may be purchased from your local
Jandy distributor. See Section 11 (Parts List) of this
manual for the correct part number for your model and
size heater.
Section 3. venting
3.1
combustion air Supply
The heater location must provide sufficient air
supply for proper combustion and ventilation of the
surrounding area as outlined in the latest edition of
ANSI standard Z223.1 (NFPA 54). The minimum
allowable combustion air opening in the Canadian
Natural Gas and Propane Installation Code (CAN/CSA
B149.1) are not sufficient for safe and proper operation
of the Legacy Model LRZ millivolt heaters. Combus-
tion air openings must be followed per the require-
ments of ANSI Z223.1 (NFPA 54) and Table 3.
In general, these requirements specify that the
room in which a heater is installed should be provided
with two permanent air supply openings; one within
12 inches (305mm) of the ceiling, the other within
12 inches (305mm) of the floor. All indoor installa-
tions must have openings to outside air for combus-
tion, ventilation, and dilution of flue gases from inside
the building, see Figure 5 and Table 3. Zodiac Pool
Systems, Inc. does not recommend indoor installations
that do not provide combustion air from outside the
building.
All outdoor shelter installations (Canada only)
must have uninterrupted openings to outside air for
combustion and ventilation. The installation must
be in accordance with the latest edition of CAN/
CSA-B149.1. For combustion air supply openings,
however, the requirements of Table 3 MUST
Notes:
1. Use approved
roof jack.
Figure 5. indoor installation venting (uSa), or outdoor Shelter (canada)
Jandy ® Legacy™ Model LRZM Pool/Spa Heater by Zodiac ®
be followed for safe and proper operation. The
minimum combustion air openings allowed in CAN/
CSA B149.1 are NOT sufficient for the model LRZ
millivolt heaters.
Zodiac Pool Systems, Inc. does not recommend
outdoor shelter installations that depend on internal air
for combustion. Combustion air should be ducted to
the heater from outside the structure.
Outside Air Supply: When combustion air
is supplied directly through an outside wall, each
opening should have a minimum free area of one
square inch per 4,000 BTU/h (1.2kW) input of the
total input rating of all appliances in the enclosed
area. If air is provided through horizontal ducts, each
opening and duct must provide one square inch of flow
area for each 2000 BTU/h (0.6 kW).
Model
125
175
250
325
400
*Area indicated is for one of two openings; one at floor level and
one at the ceiling, so the total net free area would be double the
figures indicated. For special conditions, refer to NFPA54 ANSI
Z223.1.
the requirements in this table for combustion air openings
MuSt be followed for all canadian installations also. The
minimum allowable combustion air openings in the Canadian
National Standards CAN/CSA B149.1 are not adequate for proper
operation of the LRZ millivolt heaters.
Note: If using screens and/or metal louvers, compensate by adding
50% additional area to each opening. If using wood louvers each
opening must be at least four times the area indicated in the table
above.
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Installation and Operation Manual
table 3. air openings to outside
Required Net Free Open Area*
for Combustion Air Openings
Direct from outside
Duct from outside
in
cm
2
2
32
206
44
284
63
406
82
429
100
645
in
cm
2
2
64
413
88
568
126
813
164
1058
200
1290
3)
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