Section 6. Maintenance; Maintenance Instructions; Care And Maintenance; Pressure Relief Valve - Pentair MASTERTEMP 175K BTU/HR Guide D'installation Et D'utilisation

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Maintenance Instructions

CARE AND MAINTENANCE

Risk of fire or explosion from flammable vapors. Do not store gasoline, cleaning fluids, varnishes, paints, or other volatile
flammable liquids near heater or in the same room with heater.
The following maintenance is recommended every six months and at the start of every swimming season:
1. Inspect the heater panels and venting system to make sure that there are no obstructions to the flow of ventilating air or
burner exhaust. Check that room air intakes are open and clear of obstructions.
2. Keep the area in and around the heater clear and free from combustible materials, gasoline and other flammable vapors
and corrosive liquids.
3. Test the operation of the pressure relief valve by lifting the valve lever (if installed).
4. Test for proper operation of the water pressure switch. (See "WATER PRESSURE SWITCH" (page 35) for testing
instructions).
5. On enclosed installations with high-temperature Special Gas Vent systems, repeat the "Final Installation Check,"
page 28. Check for evidence of joint leakage. Make sure that joints have not slipped partially or completely apart.
Check pipe and fittings for cracks or breaks. The combustion air blower is permanently lubricated, and does not
require periodic lubrication. The burner does not require maintenance or adjustment by the user. Call a qualified
service technician if you suspect that the burner may require maintenance.

PRESSURE RELIEF VALVE

Canadian code requires and some U.S. local codes may require installation of a
Pressure Relief Valve (PRV). Purchase separately and install (P/N 460925) a
3/4" pressure relief valve complying with the ANSI/ASME Boiler and Pressure
Vessel Code, having a capacity equal to the Btu/hr rating of the heater.
The relief pressure of the valve MUST NOT EXCEED 50 PSI. The relief valve
must be installed vertically. To install the valve, use a 3/4" x 3-1/2" brass nipple
at the manifold and two (2) brass elbows and nipples (supplied), as shown in
Figure 34. No valve is allowed to be placed between the manifold adapter and
the relief valve. Note: Be sure to use threaded seal tape (PTFE) or
equivalent, on all treaded metal pipe connections.
To avoid water damage or scalding from operation of the relief valve, install a
drain pipe in the outlet of the pressure relief valve that will direct water discharging
from the valve to a safe place for disposal. DO NOT install any reducing couplings
or valves in the drain pipe. The drain pipe must be installed
as shown in Fig. 34 to allow complete drainage from the valve and drain line.
Important! The relief valve should be tested at least once a year by lifting the valve lever.
Explosion hazard. Any heater installed with restrictive devices in the piping system downstream from the heater, (including check
valves, isolation valves, flow nozzles, or therapeutic pool valving), must have a relief valve installed as described above.
NOTE: SEE PAGE 55 TO INSTALL THE PRESSURE RELIEF VALVE WATER PIPE ESCUTCHEON.
THIS ENSURES THE HEATER IS RODENT RESISTANT.
MASTERTEMP Pool and Spa Heater Installation and User's Guide
WARNING
(NOT FACTORY INSTALLED)
WARNING

Section 6. Maintenance

(PRV)
3/4" x 1-3/8" Brass Nipple
(22.86 cm x 38.00 cm)
Drill through the NPT Port, then
use a 3/4" x 2-1/2 Brass Nipple
and Elbow (user supplied) for a
PRV Installation.
Figure 34.
Rev. N 10/2018