Raypack Pool Heater - Unitherm Question

ahha0527

In The Industry
Jul 11, 2022
45
Los Angeles
Hello
raypack model heater is 337A with versabrass header

any idea what part number the unitherm is?
cant seen to find it
the other ones i find are bigger in size

this particular one is smaller in size and screwed in all 4s
IMG_8210.jpeg
 

Attachments

  • IMG_8211.jpeg
    IMG_8211.jpeg
    584.1 KB · Views: 2
1738172231128.png
1738171843626.png

F10642-2



1738171936161.png



NOTE: The Unitherm Governor and Bypass Valve Assyare not individually replaced components on ASME units.

If either needs to be replaced, the entire UG/Bypass assy must be replaced.

The "yellow" spring is used on models 207A, 267A.

The "green" spring is used on models 337A, 407A.


1738171985337.png
1738172384268.png
 

Attachments

  • 017958F-4.jpg
    017958F-4.jpg
    247 KB · Views: 1
Last edited:
The patented Unitherm Governor is a thermostatic mixing valve specifically designed to maintain constant heater internal temperature between105°F (41°C) and 115°F (46°C) despite continually changing flow rates from the filter and changing pool temperatures.

This narrow range is needed to prevent damaging condensation on the burners which will occur if the heater runs for any length of time below100°F (38°C).

It is also needed to inhibit scale formation in the tubes by maintaining temperatures well below accelerated scaling temperatures.

1738175603034.png

1738172606333.png
 
Last edited:
Raypak
UG Bypass Assembly Kit 336-408
Product #:RAY-151-0173

Mfg. Part #:018758F


1738177809601.png


#018758F Raypak Digital ASME Pool Heater, UG Bypass Assembly Kit, 336-408

GTIN: 840891045175




https://www.amazon.com/-/es/Raypak-018758F-Bypass-Assy-336-408-kit/dp/B0DLLNJCV9


12345.jpg23456.jpg34567.jpg4567.jpg
 
Looks like part number 018758F is probably correct.

The "green" spring is used on models 337A, 407A.

It is a combination Internal Bypass and Unitherm Governor.

NOTE: The U.G. on ASME models (bronze headers) can only be replaced by replacing the entire Unitherm Governor/Bypass Valve Assembly.

U.G./Bypass Assembly (Units manufactured from 12/2019).

When was the heater made?

1738180030480.png

1738180151553.png


1738180585418.png
 
Last edited:

Enjoying this content?

Support TFP with a donation.

Give Support
TFP is a registered 501(c)3 non-profit that is maintained by user donations.

The people who answer questions are volunteers.

If you find the site to be a good resource, please consider making a donation to help support the site.

Thanks.

 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.