HEAT EXCHANGER REMOVAL

1.Shut water, gas and electricity off, close valves and relieve pressure, remove relief valve. Re- move side inspection panels.

2.Remove top holding screws.

3.Remove draft diverter, lift and remove top and flue collector on stack-type models. Remove inspec- tion panels.

4.Loosen bolts and disconnect flange nuts on inlet/ outlet header, loosen union(s) at gas pipe and slide boiler away from piping until studs clear the header.

5.Remove combustion chamber clips at the four corners of the heat exchanger.

6.Lift heat exchanger straight up using caution not to damage refractory.

7.Reverse above procedure to reinstall.

CONTROL IMMERSION WELL REPLACEMENT

1.Shut water off to heater and drain heat exchanger.

2.Remove jacket top panel.

3.Remove old control well with bushing and sleeve, with 7/8" wrench or socket.

4.Slip "O" ring gasket over control well and install in header.

"O" RING GASKET

WELL ASSEMBLY

Fig. # 8101.0

UNITHERM GOVERNOR (U.G.) REPLACEMENT

1.Shut water, gas and electricity off, close valves and relieve pressure.

2.Drain heat exchanger.

3.Remove retainer plug located under outlet pipe connection.

4.Remove spring and replace old U.G. with a new U.G.

5.Reverse above procedure to re-install.

GASKET

U.G.

RETAINER PLUG

SPRING

FIig. # 8071.0

To test the operation of the Unitherm Governor, place in hot water (over 110 °F) and watch for move- ment against spring. If there is no movement, replace unit.

TUBE CLEANING PROCEDURE (Typical)

Establish a regular inspection schedule, frequency depending on local water condition and severity of service. Do not let the tubes clog up solidly. Clean out deposits over 1/16" in thickness.

The heater must be cleaned from the rear as shown. It is preferable, however, to remove the heat exchanger and the in/out header for better visibility through the tubes and to be sure the ground-up lime dust does not get into the system.

Note that you do not remove the top panel or the heat exchanger, generally.

After reaming, mount the wire brush in place of the auger and clean out debris remaining in the tubes.

Another method is to remove the heat exchanger, ream tubes and immerse heat exchanger in non- inhibited de-scale solvent.

Fig. # 8128.0

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Raypak 155C Heat Exchanger Removal, Control Immersion Well Replacement, Unitherm Governor U.G. Replacement
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155C specifications

The Raypak 155C is a versatile and efficient heater designed for both residential and commercial applications. Renowned for its robust construction and reliable performance, this unit is an excellent choice for pool and spa heating as well as for providing comfortable ambient temperatures in enclosed or outdoor spaces.

One of the standout features of the Raypak 155C is its innovative copper heat exchanger, which is designed for maximum heat transfer efficiency. This technology allows for rapid heating capabilities, ensuring that water reaches the desired temperature quickly and effectively. The heat exchanger is also resistant to corrosion, thanks to its durable design, prolonging the unit's life and maintaining performance over time.

Designed with user convenience in mind, the Raypak 155C features an intuitive digital control system. This user-friendly interface allows for easy temperature adjustments and monitoring, giving users precise control over their heating requirements. An integrated diagnostic system is also included, providing real-time feedback on the heater's performance and alerting users to any potential issues, which helps in proactive maintenance.

Incorporating advanced safety features, the Raypak 155C includes a high limit switch and a water flow switch, ensuring safe operation at all times. These safety mechanisms prevent overheating and dry firing, protecting both the heater and the connected plumbing system.

The Raypak 155C is engineered for energy efficiency, meeting and exceeding industry standards. With a compact design, it ensures easy installation and integration into existing setups, making it a favorable choice for various applications. Its quiet operation adds to user comfort, allowing it to be installed in residential settings without causing disturbances.

With a heating capacity of 155,000 BTU, the Raypak 155C is capable of effectively heating larger pools and spas, making it ideal for homes with extensive water features. The heater is designed to run on natural gas or propane, providing flexibility based on user preferences and availability.

Overall, the Raypak 155C combines state-of-the-art technology with practical features, making it one of the top choices for those looking to enhance their pool experience or improve comfort levels in their outdoor areas. Its reliability, efficiency, and user-friendly features make it a valuable investment for any property.
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