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�2 Section 3. Installation Instructions <br /> PLUMBING CONNECTIONS <br /> The MasterTemp heater has the unique capability of direct <br /> schedule 40 PVC plumbing connections. A set of bulkhead <br /> fittings is included with the MasterTemp heater to insure �,e°e � <br /> conformity with Pentair's recommended PVC plumbing o o°°° �� <br /> o ° �� <br /> proce dure. O t her p lum bing connec tions can be use d. See o�.° � <br /> Figure 3 far plumbing connections. :�o � <br /> `° 0 <br /> �� <br /> OCAUTI O N POOL TO PUMP <br /> POOL <br /> �p{ry� ` /y�� ��p��� �{^1 ` HEATER FILTER <br /> L.F,M�i �� `� ��N I � �Ri�� II�{.Q�I�� `� MANUAL /; <br /> BV�ASS <br /> on the arculation p�e�arid bleed all the air from the �"TE -� <br /> VALVE <br /> fl�q"USICIg t�lE aIC 1�1��VE'OIl tOp�t�'lE fl�t: �E�' I�� <br /> should flaw freely through the heater: DO 1'lOt o�7el�e Figure 3. <br /> FftOM <br /> �12�E�'UII�@SS V1ki�@P ICl�12 pOO��S� IS��12 �71'0�7EP voo� <br /> lev�el.If a rriarx,�al b�p�ss is ir�stalled,te�rporarily dose it <br /> to ir�sw�+e that all air is purc,�ed from the heater: <br /> WATER CONNECTIONS <br /> The heater requires proper water flow and pressure for its 3-Way Chlorinator <br /> operation. See Figure 5 for the recommended installation. � � �alve � <br /> The filter pump discharges to the filter,the filter discharges � <br /> to the heater, and the heater discharges directly to the pool l l l cneck vaive— <br /> or spa. j j t <br /> A manual bypass valve should be installed across the heater ' <br /> when the pump flow exceeds 120 GPM (454 LPM). See j Heater <br /> "WATER FLOW RATE"on page 13-Table 1 for setting of t <br /> Main <br /> the manual by-pass valve. Drain � Fi�r <br /> Make sure that the outlet plumbing from the heater contains �, Pool � Spa;�-, <br /> no shut-off valves or other flow restrictions that could prevent ,%' O ;; r <br /> flow through the heater(except for pool installations as noted ��;� l Pum <br /> below,ar winterizing valves where needed).To switch flow t <br /> between the pool and spa, use a diverter valve. Do not use � j ti � � <br /> any valve that can shut off the flow. l <br /> � � � � y � <br /> Install the chemical feeder downstream of the heater.Install From Pool 3-Way 3-Way <br /> a chemical resistant one-way check valve between the heater Valve Valve <br /> and the chemical feeder to prevent back-siphoning through <br /> the heater when the pump is of£ Figure 5. <br /> NOTICE:If the heater is plumbed in backwards,it will cycle continuously.Make sure piping from filter is not reversed <br /> when installing heater. <br /> Connect the heater directly to 2" PVC pipe, using the integral unions provided. Heat sinks are not required. The low <br /> thermal mass of the heater will prevent overheating of the piping connected to the pump even if the heater shuts down <br /> unexpectedly. <br /> Occasionally a two-speed pump will not develop enoughpressure on the low speed to operate the heater.In this case,run <br /> the pump at high speed only to operate the heater.If this does not solve the problem,do not try to run the heater.Instead, <br /> correct the installation. <br /> Do not operate the heater while an automatic pool cleaner is also operating.If the circulation pump suction is plugged(for <br /> example by leaves), there may not be adequate flow to the heater. Do not rely on the pressure switch in this case. <br /> MASTERTEMP� Pool and Spa Heater Installation and User's Guide Rev. M 1-8-15 <br />