Indoor Venting - General Requirements (Category I And Category Iii Requirements); Heater Clearances - General Requirements (Indoor Installation Us / Canada); Outside Vent Cover Removal - Pentair MASTERTEMP 175K BTU/HR Guide D'installation Et D'utilisation

18
INDOOR VENTING — General Requirements
The heater may be installed as a Category I or Category III appliance.
Vented Appliance (Category I) –
An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive
condensate production in the vent, see
Vented Appliance (Category III) –
An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive
condensate production in the vent, see
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
a draft hood with this heater.
The MasterTemp heaters are capable of a 270-degree discharge rotation and operate with a positive vent static pressure
and with a vent gas temperature less than 400° F (204° C). The total length of the horizontal run must not exceed the length
that is listed in Table 11 on
HEATER CLEARANCES — General Requirements
INDOOR INSTALLATION (US / CANADA)
The following clearances must be maintained from combustible surfaces:
TOP .............................. 6 in. (15 cm)
EXHAUST SIDE ........... 6 in. (15 cm)
HEADER SIDE ............. 6 in. (15 cm)
DOOR PANELS* .......... 6 in. (15 cm)
Note (*) For service access it is advisable to allow for sufficient clearance
on at least one door panel. The heater is design certified by CSA
International for installation on combustible flooring. For installation on
carpeting, the heater must be mounted on a metal or wood panel that
extends at least three (3) inches beyond the base of the heater. If the
heater is installed in a closet or alcove, the entire floor 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.

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.
MASTERTEMP Pool and Spa Heater Installation and User's Guide
Vertical only
pages 20-23.
Vertical or Horizontal
pages 24-26.
page 21-22.
Section 3. Installation Instructions
pages 18-28. If not, replace the vent system. DO NOT use
(*) For service access, it is advisable to allow for
sufficient clearance on at least one door panel.
6 in.*
Figure 10.
6 in.
6 in.*
6 in.
Rev. N 10/2018