Rheem PE Series Service Manual

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Fault Isolation Some of the checks below may need to be done by a qualified service technician. Call a service technician for any remedy that involve

Fault Isolation Code Fault Remedy 02 No burner operation during freeze protection mode Service Call - Check for possible freeze damage to heat excha

14 Thermal Fuse Check gas type of unit and ensure it matches gas type being used. Check for restrictions in air flow around unit and vent terminal. C

Electrical Diagnostic Points Wire Color Voltage Resistance Connector No. Pin No.’s (SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids (Main)

Electrical Diagnostic Points Wire Color Voltage Resistance Connector No. Pin No.’s Thermal Fuse / Overheat Switch Red - Red 11 - 13 VDC below 1

Electrical Diagnostic Points Wire Color Voltage Resistance Connector No. Pin No.’s (SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids (Main)

Electrical Diagnostic Points Wire Color Voltage Resistance Connector No. Pin No.’s Thermal Fuse / Overheat Switch Red - White 11 - 13 VDC below

Wiring Diagram 305e/o, 305i, 505e/o, 505i COLOR CODINGW :WhiteBK:BlackBR:BrownR :RedBL:BlueY :YellowP :PinkO :OrangeG :GreenGY:Gray13BR31B12OFFDip SW1

Wiring Diagram 705e/o (ASME), 705i (ASME) A31W31B12OFFDip SW1387654F4WWB1BKBKMINMAXMODULATING VALVECURRENT ADJUSTINGGas pressureF3WWWPWWOUTGOING WA

An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the he

Table of Contents General Information...3-5Specifications...

Component Replacement Instructions Ignition line Six screws Wire harness connector PC Board (dip switches) Three screws 1. Turn off the gas

Component Replacement Instructions 13. Install the gas manifold using 2 new packings (included in kit) between the manifold and the heat exchanger.

Component Replacement Instructions 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Remove four screws securing the front panel

Component Replacement Instructions Figure 10 black / orange orange / orange Figure 9 WARNING Failure to correctly assemble the components accordi

Component Replacement Instructions 305e/o, 505e/o1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply.

Component Replacement Instructions 305i, 505i1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. 4.

Component Replacement Instructions 705e/o (ASME),705i (ASME) 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the wate

1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. 4. Remove four screws securing the front panel.

Propane (LPG) Natural Gas (NG) SW2 setup for 505i Switch No.FOF5643ON12Switch No.FOF5643ON12Switch No.FOF5643ON12Switch No.FOF5643ON12Component Repl

Component Replacement Instructions 705e/o (ASME), 705i (ASME)1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Remove four screw

General Information Safety Definitions This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and o

Component Replacement Instructions 305e/o, 305i, 505e/o, 505i 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the wat

Component Replacement Instructions Assemble A.water flow sensor harness (black/yellow/red wires) B.water flow servo harness (red/blue/brown/yellow/gra

Component Replacement Instructions 505e/o, 505i 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. D

Component Replacement Instructions 11. Remove the 4 screws attaching the water inlet to the underneath side of the water heater. a. water flow sensor

Component Replacement Instructions 705e/o (ASME), 705i (ASME) 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the wat

Component Replacement Instructions 305e1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Drain all w

Component Replacement Instructions 305eDisconnect PC Board (Figure 31) 11. Remove 1 screw connecting the PC Board to the heat exchanger assembly. 12

Component Replacement Instructions 305e21. Install the largest O-ring (included in kit) over the water outlet tube and the two smaller O-rings (inclu

Component Replacement Instructions 505e/o1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Drain all

Component Replacement Instructions Disconnect PC Board (Figure 39) 11. Remove 1 screw connecting the PC Board to the heat exchanger assembly. 12. R

General Information On-Demand Gas Tankless Water Heater Service Manual4Service InformationThe on-demand water heaters must be installed according to a

Component Replacement Instructions 20. Remove 2 screws above the exhaust. Pull assembly from the unit. (Figure 42) 21. Install the largest O-ring (inc

Component Replacement Instructions 305i1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Drain all w

Component Replacement Instructions Ignition line 6 screws (gas manifold) PC Board screw 3 machine screws (gas valve) 13. Remove the 6 screws

Component Replacement Instructions 19. Remove the wire harness attachments - sensors, heating elements, fusible link brackets. Ensure that the small

Component Replacement Instructions 26. Install the O-ring (included in kit) over the water outlet tube and the O-ring (included in kit) over the wa

Component Replacement Instructions 1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Drain all water

Component Replacement Instructions Disconnect PC Board (Figure 58) 10. Remove 1 screw from the water outlet bracket. Remove the bracket by rotating a

Component Replacement Instructions 505iRemove Burner and Burner Cover Plate (Figure 59) 16. Remove the 8 screws attaching the burner cover plate to th

Component Replacement Instructions 505i Remove Heat Exchanger and Air Intake/Exhaust 20. Remove 8 screws connecting the assembly to the water heater

Component Replacement Instructions Combine the Heat Exchanger and the Air Intake/Exhaust 28. Push the heat exchanger into the air intake/exhaust ass

General Information On-Demand Gas Tankless Water Heater Service Manual5Closed System/Thermal ExpansionCAUTION - PROPERTY DAMAGE HAZARDAs water is heat

Component Replacement Instructions 705e/o (ASME)1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Dr

Component Replacement Instructions 15. Remove the fan assembly (4 screws) and install it on the new heat exchanger. (Figure 71) 16. Remove the flue

Component Replacement Instructions 705i (ASME)1. Turn off the gas supply. 2. Turn off the 120 V power supply. 3. Turn off the water supply. Drai

Component Replacement Instructions 14. Remove the 3 screws at the seal plate at the top of the water heater. Remove the seal plate and gasket. (Figu

Component Replacement Instructions 24. Insert the burner and place the burner cover plate into position. Attach the burner cover plate first with 9 s

Gas Pressure Setting Procedure 1. Remove the front panel (four screws). 2. Calibrate the low fire and high fire settings as follows: A. Remove the

Figure 89 Forced Low Switch No.FOF857643ON12Figure 90 Forced High Switch No.FOF857643ON12Figure 91 Normal Switch No.FOF857643ON12Figure 88 Access plu

Manifold Gas Pressure Settings 100/101 and 200/201 Series Altitude High Fire Low Fire High Fire Low Fire 305e/o 2.9 0.56 4.2 0.88 505e/o 3.3 0.5

0-2000 ft (0-610 m) 2001-5200 ft (610-1585 m) 5201-7700 ft (1585-2347 m) 7701-10200 ft (2347-3109 m) #2: OFF #2: OFF #2: ON #2: ON #3: OFF #3: ON

Notes On-Demand Gas Tankless Water Heater Service Manual59

Specifications Model NumberTemperature Range 305 15,000 - 199,000 NG15,000 - 190,000 LP705/705 ASMEIndoor (i) On-Demand Gas Tankless Water Heater Serv

• 500 Tennessee Waltz Parkway • Ashland, TN 37015 •

Specifications Model NumberTemperature Range 305 Indoor (i) On-Demand Gas Tankless Water Heater Service Manual7InputMin. - Max.(BTU)Flow RateHot water

Schematic Diagrams Outdoor Model (NOT PRESENT ONALL MODELS)(LOCATED ON BRACKET NEARFAN ON SOME MODELS)(NOT PRESENT ONALL MODELS)On-Demand Gas Tankless

Schematic Diagrams Indoor Model (NOT PRESENT ONALL MODELS)(NOT PRESENT ONALL MODELS)(LOCATED ON BRACKET NEARFAN ON SOME MODELS)On-Demand Gas Tankless