Pentair MASTERTEMP 125 User Manual

P/N 475114 Rev. F 8/2020 MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide
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(*) For service access, it is advisable to allow for
sufficient clearance on at least one door panel.
15 cm
(6 in)
15 cm
(6 in)
15 cm
(6 in)
15 cm*
(6 in)
*
Figure 15.
HEATER CLEARANCES — General Requirements
INDOOR INSTALLATION OR OUTDOOR SHELTER
The following clearances must be maintained from the nearest walls: (See Figure 15 and 16)
TOP............................... 15 cm (6 in)
EXHAUST SIDE ........... 15 cm (6 in)
HEADER SIDE ............. 15 cm (6 in)
DOOR PANELS* ......... 15 cm (6 in)
Note (*) For service access it is advisable to allow for sufcient clearance on at least one door panel. The heater
is designed for installation on combustible ooring. For installation on carpeting, the heater must be mounted on
a metal or wood panel that extends at least 9 cm (3 in) beyond the base of the heater. Note: Wall sensitive to heat
(for example wood), must be protected by a suitable insulation. If the heater is installed in a closet or alcove, the entire
oor shall be covered by the panel. On an outdoor shelter installation, the exhaust discharges into a vent pipe. Orient
the heater so that the vent pipe does not interfere with adjustment of the operating controls. The control panel located
on the top panel can be rotated to any of the three sides of the heater for easy access. However, the control panel must
not be located on the side where the vent is located.
INDOOR VENTING — General Requirements
If you are considering connecting this heater to a pre-existing vent system, make sure that the vent system meets the
appropriate venting requirements as given in this manual on pages 11-16. If not, replace the vent system. DO NOT
use a draft hood with this heater. The MasterTemp heaters are capable of a 270° C (518° F) discharge rotation and
with a vent gas temperature less than 204° C (400° F). The total length of the horizontal run must not exceed the
length that is listed in Table 6 on page 13.
Outlet Air
Opening
Inlet Air
Opening
Chimney or Gas Vent
Vent Cap and
Riser Furnished
by Installer
Side
Wall Vent
Heater
Chimney or Gas Vent
Vent Cap and
Riser Furnished
by Installer
Side
Wall Vent
Outlet Air Opening
Inlet Air Opening
OUTSIDE VENT COVER REMOVAL
The heater is supplied from the factory with a built-in stackless outside vent for outdoor
installation. Remove the outside vent cover for outdoor shelter installation.
Figure 16.
Section 1. Installation

Pentair MASTERTEMP 125 Specifications

General

BTU Output	125, 000 BTU/hr
Fuel Type	Natural Gas or Propane
Ignition System	Electronic
Minimum Flow Rate	20 GPM
Maximum Working Pressure	50 PSI
Efficiency	82%
Water Connections	1.5 inch
Certifications	ANSI Z21.56
Voltage	120V