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Rheem GHE 125-500A, Use & Care Manual, Page: 25 / 40

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Rheem GHE 125-500A Use & Care Manual Download Page 25

25

Operation

Steps to adjust the setpoint temperature

Figure: 21

Summary of Contents for GHE 125-500A

Page 1: ...rmed by a qualified installer service agency or the gas supplier WARNING If the information in these instructions are not followed exactly a fire or explosion may result causing property damage person...

Page 2: ...zards that can kill or hurt you and others All safety messages will follow the safety alert sym bol and either the word DANGER WARNING CAUTION or NOTICE These words mean DANGER An imminently hazardous...

Page 3: ...for altitudes greater than 2 000 up to 5 400 FT HA2 LP Gas Approved for altitudes greater than 5 400 up to 7 800 FT For LP Models see table 6 for approved altitude ranges FOR NATURAL GAS MINIMUM GAS S...

Page 4: ...lations the temperature was set at 120 F before water heater was shipped from the factory The illustration infor mation on pages 25 shows the Display and how to adjust the water temperature Hotter wat...

Page 5: ...ion Section Pages 23 26 prior to any installation work Gasoline as well as other flammable materials and liquids adhesives solvents etc and the vapors they produce are extremely dangerous DO NOT handl...

Page 6: ...of the ser viceable components D RESTAURANT INSTALLATION If the water heater is to be installed in a restaurant or other lo cation where NSF International listing is required this unit must be sealed...

Page 7: ...ure Pressure Temperature and Pressure Relief Valves and Vacuum Relief Valves is provid ed with the water heater No valve is to be placed between the relief valve and the water heater For a circulating...

Page 8: ...nnecting the exhaust vent pipe the condensate elbow assembly supplied but not factory installed must be connected to the ex haust pipe on the water heater See Figure 2 The free end of the 3 x 3 x 1 5...

Page 9: ...earances shown in Figure 4 NOTICE DO NOT use in conjunction with a GFCI To avoid the risk of fire explosion or asphyxiation from carbon monoxide NEVER operate this water heater unless it is properly v...

Page 10: ...he Thermal Expansion Tank if required A manual valve union and a sediment trap shall be provided in front of the gas valve All gas piping must conform to local codes and or the National Fuel Gas Code...

Page 11: ...tarting the vent installation careful planning should be given to the routing and termination of the vent pipes The length of the vent pipes inlet and outlet should be kept to a minimum Also see Figur...

Page 12: ...ruc tions Manual for complete instructions on venting and condensate drainage Stress levels in the pipe and fittings can be signifi cantly increased by improper installation If rigid pipe clamps are u...

Page 13: ...ent and Air Intake Pipe Lengths 6 Pipe Table 4 Minimum and Maximum Vent and Air Intake Pipe Lengths 4 Pipe 50 0 240 Fuel Type Fuel Type NAT or LP NAT or LP Vent4 ft 20 GHE119 500 GHE125 500A 50 50 120...

Page 14: ...d However improper location or installation can result in severe damage to the structure or exterior finish of the building VERTICAL VENT INSTALLATION Once the vent terminal location has been determin...

Page 15: ...lbow A screen that significantly restricts airflow will reduce the performance of the water heater and could cause nuisance control lockouts Com plete the installation of the remainder of the vent and...

Page 16: ...equal to 12 30 5 cm and above expect ed snow level from the ground the instal lation must be modified as shown below See Figure 14 Vent Terminal Low ground clearance Terminate exhaust vent with 45 elb...

Page 17: ...rdance with current ANSI Z223 1 NFPA 54 National Fuel Gas Code A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves bot...

Page 18: ...s 2 In accordance with current ANSI Z223 1 NFPA 54 National Fuel Gas Code A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and...

Page 19: ...nt pipe To prevent this from happening the pipe should be installed with a slight upward slope of 1 8 per foot The vent system must be supported every 5 feet of vertical run and every 3 feet of hori z...

Page 20: ...20 Installation Schematic Diagram Figure 18...

Page 21: ...ically grounded Elec trical power should be supplied through a fused disconnect switch located near the water heater Where local codes permit use the supplied power cord for field connection A groundi...

Page 22: ...ater heater and piping air vented Water connections tight and free of leaks C Gas Supply Gas line equipped with shut off valve union and sediment trap drip leg Approved pipe joint compound used Soap a...

Page 23: ...ith the application Hotter water increases the Potential for Hot Water SCALDS When this water heater is supplying general purpose hot water requirements for individuals a thermostatically con trolled...

Page 24: ...as valve is opened and ignitor remains energized for 3 seconds Is flamed detected within 5 seconds Control is manually reset by pressing the i button Blower is de energized and control goes into locko...

Page 25: ...25 Operation Steps to adjust the setpoint temperature Figure 21...

Page 26: ...e knob will not turn by hand don t try to repair it call a qualified service technician Force or attempt to repair may result in a fire or explosion C Do not use this appliance if any part has been un...

Page 27: ...established the inspection program can be modified to suit the water conditions Cleaning should be per formed if the scale has accumulated above the drain valve opening A wet dry shop vac with a nozzl...

Page 28: ...should be less than 25 ppm In the combustion readings are outside of the specified ranges check the manifold pressure on the gas control at the outlet pressure tap See figure 21 for the location of t...

Page 29: ...n the tank Drain the water heater to remove scale and sediment Insufficient hot water Heater undersized for load Reduce hot water usage rate Check display for error code See tables 8 and 9 Temperature...

Page 30: ...t WZ hZ D K Khd K s Ed Table 8 shows a list of lockout error codes A lockout code will be visible on the control dis play in the form of a code letter A followed by a number and a short message Lockou...

Page 31: ...E ZZKZ h E KZ KZd h D d Zd ZKhE ZZKZ t d Z d E KZ KW E t ZZKZ W ZZKZ Table 9 shows a list of blocking error codes A blocking code will be visible on the control dis play in the form of a code letter...

Page 32: ...i t e h t f o t s o m s p m a o r c i m 7 e r u l i a f e m a l f A d e y a l p s i d o s l a s i s e r u l i a f e m a l f f o r e b m u n e h t f o l a t o t g n i n n u r A l a i r t e h t g n i r...

Page 33: ...the measurement is taken after the cycle Besides resistance the continuity of the ignitor circuit can be checked With the multimeter probes still in the terminal switch the meter to check for continui...

Page 34: ...Sensors 2 in 1 T P Relief Valve Condensate Elbow Assembly Trim Plate 2 pcs Flue Gas Temperature Sensor Blocked Exhaust Switch Inlet Pipe Nipple Power Supply Junction Box Insulation Tank Top Air Intake...

Page 35: ...trol Panel Parts Stando 3 5 in length Transformer 120 VAC 24 VAC Relay Terminal Block Main Operating Control Control Display Display Bracket Description Description Fuse 5A delay Stando 2 5 in length...

Page 36: ...ting ange insulation disk retaining plate and bolts Flange Assembly Gasket blower to transition tube Blower Gas Control Gasket burner to mounting ange Burner Gas Pressure Switch Gas Control Flange w g...

Page 37: ...37 Notes...

Page 38: ...38 Notes...

Page 39: ...39 Notes...

Page 40: ...ng information should be made available a Model and serial numbers of the water heater as shown on the rating plate attached to the jacket of the heater b Address where water heater is located and can...

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