Honeywell Water Heater 238 47759 00 User Manual

75 GALLON ULTRA LOW NOx  
SUPPLEMENT TO INSTRUCTION MANUAL  
P/N 238-47759-00  
MINIMUM CLEARANCES  
(Replaces pg. 8 in instruction manual)  
WARNING  
Failure to adhere to these installation and operating instructions may  
create a hazard to life and property and will nullify the warranty.  
This installation must allow access to the front of the water heater and  
adequate clearance must be provided for servicing and operating this water  
heater. The water heater may be installed on either a combustible or non-  
combustible floor. If the water heater is to be installed directly on carpeting, it  
must be installed on top of a metal or wood panel (or equivalent) extending  
beyond the full width and depth of the appliance by at least three (3) inches  
(7.6 cm) in any direction or, if the appliance is to be installed in an alcove or  
closet, the entire floor must be covered by the panel. If the rating plate or  
the label on the front of the water heater specifies minimum clearances  
less than those listed in the below table, the water heater may be  
installed in accordance with the minimum clearances listed on the rating  
plate or the label on the front of the water heater.  
If it is necessary to install this water heater in an alcove, use the clearances  
listed in the following table and Figure 1.  
Figure 1  
238-49945-00B REV 6/12  
 
BURNER FLAME CHECKS (Replaces pg. 21 of instruction manual)  
These models are equipped with self-adjusting air mixture and do not  
have an adjustable air shutter. At periodic intervals, a visual check of the  
main burner and pilot flames should be made to determine if they are burning  
properly. The main burner flame should light smoothly from the pilot. The  
burner flame should be soft and undefined. After five minutes of burner  
operation the burner face should be glowing orange and emitting an orange  
flame.  
Figure 6  
3
 
(Replaces pg. 24 of instruction manual)  
Manufactured under one or more of the following U.S. Patents: RE.34,534;  
B1 5,341,770; 4,416,222; 4,628,184; 4,669,448; 4,672,919; 4,808,356; 4,829,983;  
4,861,968; 4,904,428; 5,000,893; 5,023,031; 5,052,346; 5,081,696; 5,092,519;  
5,115,767; 5,199,385; 5,277,171; 5,372,185; 5,485,879; 5,574,822; 5,596,952;  
5,660,165; 5,682,666; 5,761,379; 5,943,984; 5,954,492; 5,988,117; 6,142,216;  
6,395,280; 6,684,821; 7,063,132; 7,007,748  
Other U.S. and Foreign patent applications pending. Current Canadian Patents:  
1,272,914; 1,280,043; 1,289,832; 2,045,862; 2,092,105; 2,107,012; 2,108,186;  
2,112,515  
Complete the following information and retain for future reference:  
Model No:  
Serial No:  
Service Phone  
Days:  
Nights:  
Address:  
Supplier:  
Supplier Phone No:  
Figure 7  
4
 
PARTS LIST AND DRAWING  
(Replaces pg. 27 of instruction manual)  
PART NAME AND DESCRIPTION  
15. Drain Valve  
1. Draft Diverter  
2. Jacket Head Pan  
16. Gas Control Valve  
3. Jacket  
17. Manifold Bracket  
4. Outer Door  
18. Re-Settable Thermal Switch Wire Harness  
5. NIpple-Hot Water Outlet  
6. Flue Baffle Assembly  
7. Dip Tube-Cold Water Inlet  
8. Temperature and Pressure Relief Valve  
9. Glass Lined Tank  
19. Burner Assembly  
20. Re-settable Thermal Switch  
21. Burner Assembly Cover  
22. Gas Feedline  
23. Orifice  
10. Heat Radiation Shield  
11. Foam Insulation  
24. Thermopile Wire  
25. Igniter Wire  
12. Combustion Chamber Assembly  
13. Jacket Base Pan  
26. Pilot Gas Feedline  
27. Pilot Assembly  
14. Inner Door Assembly  
14A. #8 x ¾ screw  
28. Magnesium Anode-Hex Head  
5
 
THE FOLLOWING INSTRUCTIONS ARE FOR INSTALLATION OF:  
GAS WATER HEATERS SUITABLE FOR WATER (POTABLE)  
HEATING AND SPACE HEATING  
(Replaces pg. 28 of instruction manual)  
1. All piping components connected to this water heater for space heating  
applications must be suitable for use with potable water. In  
Massachusetts, space heating piping length must not exceed 50 feet.  
2. Toxic chemicals, such as those used for boiler treatment, must not be  
introduced into potable water used for space heating.  
3. This water heater must not be connected to an existing heating system  
or component(s) previously used with a non-potable water heating  
appliance.  
4. When the system requires water for space heating at temperatures higher  
than required for other means, such as an ASSE approved mixing valve  
must be installed to temper the water for those uses in order to reduce the  
scald hazard potential.  
Please refer to the illustrations below for the suggested piping arrangement.  
6
 
NOTES  
7
 
NOTES  
8
 

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