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Installation and Operation Manual
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Legacy™ Model LRZM Pool/Spa Heater
such as "The Gas Safety (Installation and Use)
Regulations" (Statutory Instrument 1998 No.
2451).
2. Check the gas supply to be sure that it is the same
as the gas indicated on the heater's rating plate.
3. If there is any doubt regarding the capacity of
any existing service pipes or the size required
for new service pipes then the advice of the
gas supplier should be requested. Installation
pipework should be fitted and tested for gas
soundness. Zodiac recommends the gas inlet pipe
sizes listed in Table 5.
4. 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.
table 5. pipe size requirements*
Distance from Gas Meter
Heater
Size
0-15 m
15-30 m
30-60 m
mm
mm
mm
125
20
25
25
175
25
25
32
250
25
32
32
325
32
32
40
400
32
40
40
5. Before operating the heater, test for gas sound-
ness. Do not use a naked flame.
6. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the heater, a restrictive fitting, or an undersized
gas meter. Gas supply pressures to the heater are
listed in Table 2.
The draft hood outlet is to be connected to an
unobstructed vent pipe of the same diameter, terminat-
ing outside the building. The vent must terminate at
least 0.6 m above the highest point of the roof or other
object that is within 3.05 m of the vent termination.
The vent pipe must have a listed vent cap which allows
a full equivalent opening for flue products (see Figure
4). The top of the vent cap must be at least five (5) feet
in vertical height above the draft hood outlet.
Double wall or equivalent vent pipe is recom-
mended.
iMportant note
: Do not use sheet metal screws at
the snap lock joints of gas vents.
When venting multiple appliances through one
common duct, each appliance must have its own vent
temperature limit switch. All vent limit switches must
be wired in series so as to prevent any appliance from
firing in the event of a blocked vent. Refer to national
and local installation codes for more information on
multiple venting.
3.3.3 inspection and replacement of
existing Vent system with new
Components
If the Legacy heater 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 Legacy heater. Replace any parts
that are not in good and serviceable condition with
new parts before completing the pool heater installa-
tion.
section 4. Gas Connections
4.1
Gas supply and piping
Review the following general instructions before
continuing the installation.
WarninG
The Legacy Model LRZ pool and spa heaters are
designed for use with either natural gas or LPG.
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.
Caution
Permanent damage to the gas valve will occur if the
following procedures are not followed.
1. Gas piping installation must be in accordance
with all applicable local rules and regulations
Figure 5. Fitting a Gas service Cock
Gas Cock
Burner Pressure
Point
Inlet Gas Pressure
Test Port
Summary of Contents for Legacy LRZ
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