Section 4. Maintenance Instructions; Care And Maintenance; Pressure Relief Valve - Pentair MASTERTEMP 200 HD Installation And User Manual

36 | Section 4. Maintenance Instructions
Maintenance Instructions

CARE AND MAINTENANCE

DO NOT interfere with any sealed components. This must be done by a qualified service professional.
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.
2. Keep the area in and around the heater clear and free from combustible materials, gasoline and other flammable vapors
and corrosive liquids.
3. If applicable, test the operation of the pressure relief valve by lifting the valve lever. (See below for "PRESSURE RELIEF
VALVE" instructions.)
4. Test for proper operation of the pressure switch. (See "WATER PRESSURE SWITCH" for testing instructions.)
5. 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.
DE-LIMING THE HEATER
Working with muriatic acid can be dangerous. When cleaning elements always wear rubber gloves and eye
protection. Add acid to water, do not add water to acid. Splashing or spilling acid can cause severe personal injury
and/or property damage.
Should a heater require de-liming, this may be accomplished by circulating a solution of 30% Muriatic Acid. This process
should only be performed by a person of sufficient skill. The heater MUST be disconnected from the pool plumbing, gas
plumbing, and electric. The heater may be placed on its side with the water manifold "up". The diluted muriatic acid may be
recirculated until visible bubbles are no longer produced. Before being restored to service, the heater water ways should be
completely rinsed with regular tap water.

PRESSURE RELIEF VALVE

Local codes may require installation of a pressure relief valve (PRV). Purchase separately
and install a 19 mm pressure relief valve complying with the local Plumbing Codes,
having a capacity equal to the Mega Joule (MJ/hr) rating of the heater. The relief pressure
of the valve MUST NOT EXCEED 344 kPa.
The relief valve must be installed vertically. To install the valve, use a 19 mm x 5 mm brass
nipple at the manifold, the two brass elbows and nipples are (user supplied), as illustrated in
Figure 35. No valve is allowed to be placed between the manifold adapter and the relief valve.
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 so as to allow complete drainage from the valve
The relief valve should be tested at least once a year by lifting the
and drain line.
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.
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MASTERTEMP Pool and Spa Heater Installation and User's Guide
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.
WARNING
WARNING
WARNING
WARNING
Drill thru the NPT Port, then
use a 19 mm Brass Nipple and
Elbow (user supplied) for a
PRV Installation.
Figure 35.
P/N 475106 Rev. A 2/2014