P/N 474131 Rev. M 8/2020 MasterTemp Pool and Spa Heater
27
HORIZONTAL OR VERTICAL VENTING - USING SINGLE-WALL STAINLESS
GAS VENT (See Figures 21, 22, 23 & 26)
Vent the heater either horizontally or vertically using an optional vent adapter of the 150 mm (6 in) special gas approved
stainless steel vent pipes. Installation must be in accordance with all local codes and ordinances/or the latest edition of
the AS/NZS 5601.1 standards and/or local codes. The heater, when installed, must be electrically grounded and bonded in
accordance with local codes. Do not use a draft hood with this heater. Install the vent according to the vent manufacturer’s
detailed instructions. Note: Keep a 150 cm (6 in) minimum clearance between the vent pipe and combustible surfaces.
Follow the vent manufacturer’s instructions and code requirements. Do not place any insulating materials around the
vent or inside the required clear air space surrounding the vent. See Table 6 for maximum permissible vent lengths.
NOTE
The allowable vent runs for each vent pipe diameter are different and can
not be exceeded. Each 90-degree elbow reduces the maximum horizontal
vent run by 3.6 m (12 feet) and each 45-degree elbow in the vent run
reduces the maximum vent run by 1.8 m (6 feet). See the Table 8 for the
maximum vent lengths using 90° elbows.
150 mm (6 in.) Special Gas
Vent (Vertical or Horizontal)*
No. of 90°
Elbows
Maximum Length in
Meters (feet)
0 11.6 m (38 ft.)
1 8 m (26 ft.)
*Minimum vent length is 0.34M (1 ft.)
or in accordance with vent manufac-
turer’s instruction, and local and na-
tional codes. Horizontal vents
1 m (3 ft.) or less in length do not
require a condensate tee, but must
slope down toward the outlet at 2
cm to the meter (1/4 in / ft.) to allow
condensate to drain.
NOTE
It is recommended that vent runs over 5.4 m (18 feet) may need to be
insulated to reduce condensation related problems and/or the use of a
condensate trap in the vent run close to the heater may be necessary in
certain installations such as cold climates. Horizontal vents 1 m (3 feet) or
less in length do not require a condensate tee. The heater is suitable for
through-the-wall venting.
Flue gases may escape into the dwelling with any cracks or loose joints
in the vent pipe, or improper vent installation. The vent pipe must be of
a sealed-seam construction and for operating temperatures less than 204°
C (400°F). Vent pipe construction will be of AS/NZS 5601.1 approved
non-corrosive material, such as stainless steel. A condensate trap may
be needed. The use of “Approved” thimbles, roof jacks and/or side vent
terminals are required; and the proper clearances to combustible materials
must be maintained in accordance with type of vent pipe employed—in
the absence of a clearance recommendation by the vent pipe manufacturer,
the requirements of the Uniform Mechanical Code should be met. For
ventilation air requirements for the MasterTemp heater, see page 21. It
is recommended that vent runs over 5.4 M (18 ft) may need to be insulated to
reduce condensation related problems and/or the use of a condensate trap
in the vent run close to the heater may be necessary in certain installations
such as cold climates. Horizontal vents 1 M (3 ft) or less in length do not
require a condensate tee. The MasterTemp heater is suitable for through-
the-wall venting.
Table 6.
Section 1. Installation
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