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A.O. Smith ProMax GPDX-50 Instruction Manual

Other manuals for ProMax GPDX-50: Specification Sheet, Specifications
Manual is about: RESIDENTIAL GAS WATER HEATERS POWER DIRECT VENTED GAS MODELS

Summary of ProMax GPDX-50

  • Page 1

    Instruction manual printed 0312 185884-003 keep this manual in the pocket on heater for future reference whenever maintenance adjustment or service is required. Power direct vented gas models not for use in manufactured (mobile) homes all technical and warranty questions: should be directed to the l...

  • Page 2: General Safety

    2 general safety safe installation, use, and service your safety and the safety of others is extremely important in the installation, use, and servicing of this water heater. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and ...

  • Page 3

    3.

  • Page 4: Introduction

    4 thank you for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. Abbreviations found in this instruction manual: • csa - canadian standards association • ansi - american national standards institute • nfpa - national fire protection a...

  • Page 5

    5 for all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the commonwealth and where the side w...

  • Page 6: Typical Installation

    6 typical installation get to know your water heater - gas models a vent pipe–exhaust b vent terminal–exhaust c intake or combustion air pipe d intake or combustion air terminal e vent adapter f blower assembly g cold water inlet h inlet water shut-off valve i union figure 1. J inlet dip tube k anod...

  • Page 7: Mixing Valve Usage

    7 mixing valve usage figure 2. This appliance has been design certifi ed as complying with american national standard/csa standard for water heaters and is considered suitable for: water (potable) heating and space heating: all models are considered suitable for combination water (potable) heating a...

  • Page 8

    8 facts to consider about the location carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. This water heater is not for use in manufactu...

  • Page 9

    9 minimum clearances between the water heater and combustible construction are 0 inch at the sides and rear, 6” (15.2 cm) from the front of the jacket, and 12” (30.5 cm) from the top (standard clearance). If clearances stated on the heater differ from standard clearances, install water heater accord...

  • Page 10

    10 figure 7. Vent termination clearances wire fence when the water heater outlet terminal is low enough to be touched accidentally, or is accessible to small children, a wire mesh chain link fence (as shown in figure 8) may be used. Care should be taken to maintain adequate ventilation around the ou...

  • Page 11

    11 should you choose to apply an insulation blanket to this heater, you should follow these instructions. (for identifi cation of the components mentioned in the next column, see figure 1.) failure to follow these instructions can restrict the air fl ow required for proper combustion, potentially re...

  • Page 12

    12 thermal expansion as water is heated, it expands (thermal expansion). In a closed system the volume of water will grow. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure (leakage). Thi...

  • Page 13

    13 solder the cold water supply line directly to the cold water inlet. It will harm the dip tube and damage the tank. T & p valve and pipe insulation (if supplied) 1. Locate the temperature and pressure relief valve on the water heater (also known as a t&p relief valve). See figure 11. 2. Locate the...

  • Page 14

    14 line, and (2) the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot. If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, f...

  • Page 15

    15 figure 12. Gas piping with flexible connector. Figure 13. Gas piping with all black iron pipe to gas control. Sediment traps a sediment trap (dirt leg) shall be installed as close to the inlet of the water heater as practical at the time of water heater installation. The sediment trap shall be ei...

  • Page 16

    16 to the connector on the bottom side of the gas control valve/ thermostat. 6. If the wiring harness is not factory installed, make sure the on/ off switch is in the off position and then connect the wiring harness from the blower control box to the connector on the bottom side of the gas control v...

  • Page 17

    17 vent connections to blower assembly figure 15 shows the typical vent connections. Figure 15. Venting and installation plan the layout of the vent system from the vent termination to the water heater considering all of the 90° and 45° elbows plus the number of feet of pipe that would be needed to ...

  • Page 18

    18 4. The unit cannot be connected to existing vent piping or chimney. 5. When venting through an outside wall, the vents must terminate horizontally to the outdoors. B. All 50 gallon 65,000 btu/hr models in the carton is supplied: 1. Two 3” inlet and outlet pvc schedule 40 - 45° vent caps. 2. One 3...

  • Page 19

    19 figure 23b. 3. Minimum vent length for all models is 18 inches (46 cm). Vent pipe separation the inlet and outlet vent pipes must be separated by a minimum distance of 6 1/2 inches (16.5 cm) up to 24 inches (61 cm) maximum. Figure 24. Cutting openings through an outside wall and collar installati...

  • Page 20

    20 connecting vent to blower 1. If making an immediate horizontal run of vent off the blower, install the following at the blower inlet: one 3" pvc schedule 40 pipe (3" long minimum) and one 3" pvc schedule 40 elbow. At the outlet, install one 3" pvc schedule 40 street elbow. (exception: for the out...

  • Page 21

    21 figure 30. Vent pipe preparation 1. Initial preparation a. Make sure the solvent cement you are planning to use is designed for the specifi c application you are attempting. B. Know the physical and chemical characteristics and limitations of the pvc, abs and cpvc piping materials that you are ab...

  • Page 22

    22 3. Making the joint a. Cutting pipe must be squarely cut to allow for the proper interfacing of the pipe end and the fi tting socket bottom. This can be accomplished with a miter box saw or wheel type cutter. Wheel type cutters are not generally recommended for larger diameters since they tend to...

  • Page 23

    23.

  • Page 24: Temperature Regulation

    24 due to the nature of the typical gas water heater, the water temperature in certain situations may vary up to 30°f (16.7°c) higher or lower at the point of use such as, bathtubs, showers, sink, etc. It is recommended that lower water temperatures be used to avoid the risk of scalding. It is furth...

  • Page 25: For Your Information

    25 for your information start up conditions condensate whenever the water heater is filled with cold water, some condensate will form while the burner is on. A water heater may appear to be leaking when in fact the water is condensate. This usually happens when: a. A new water heater is fi lled with...

  • Page 26: Periodic Maintenance

    26 venting system inspection at least once a year a visual inspection should be made of the venting system. You should look for: 1. Obstructions which could cause improper venting. The combustion and ventilation air fl ow must not be obstructed. 2. Damage or deterioration which could cause improper ...

  • Page 27

    27 anode rod each water heater contains at least one anode rod, which will slowly deplete (due to electrolysis), prolonging the life of the water heater by protecting the glass-lined tank from corrosion. Adverse water quality, hotter water temperatures, high hot water usage, and water softening meth...

  • Page 28

    28 you may have a check valve installed in the water line or a water meter with a check valve. Consult your local water supplier or service agency for further information. Do not plug the temperature-pressure relief valve. Draining and flushing it is recommended that the tank be drained and fl ushed...

  • Page 29: Leakage Checkpoints

    29 leakage checkpoints read this manual fi rst. Then before checking the water heater make sure the gas supply has been turned “off”, and never turn the gas “on” before the tank is completely full of water. Never use this water heater unless it is completely fi lled with water. To prevent damage to ...

  • Page 30: Repair Parts List

    30 repair parts list key no. Part description 1 vent cap w/screen 2 adaptor, flue mounting 3 5' abs schedule 40 vent pipe (50 gal. 65,000) 3 5' cpvc schedule 40 vent pipe (75 gal.) 4 90° abs schedule 40 elbow (50 gal. 65,000) 4 90° cpvc schedule 80 elbow (75 gal.) 5 vent/blower adapter 6 blower 7 fl...

  • Page 31: Troubleshooting Guidelines

    31 troubleshooting guidelines troubleshooting guidelines trouble shooting please check guidelines below. For your safety, water heater service should be performed only by a qualifi ed service technician. Read the general safety information section fi rst. # led status problem solution 1 the gas cont...

  • Page 32

    32 # led status problem solution 7 8 9 self diagnostic check has detected a problem with the gas valve driver circuit, internal microprocessor, or other internal circuits. 1 turn the power off for 10-20 seconds then on again to clear these error codes. 2 if any of these error codes persist or cannot...

  • Page 33: Troubleshooting Guidelines

    33 these guidelines should be utilized by a qualifi ed service agent. When calling for service notify the service agent that this is a “flammable vapor ignition resistant” product. Problem cause solution not enough or no hot water 1. Blower will not run. A) "on/off" control switch turned off. Turn s...

  • Page 34

    34 residential gas limited warranty • owned by the original purchaser; • installed for indoor operation only; • used at temperatures not exceeding the maximum calibrated setting of its thermostat; • used at water pressure not exceeding the working pressure shown on the heater; • fi lled with potable...

  • Page 35

    35 service and labor responsibility under this limited warranty, the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs. Such costs may include but are not limited to: a. Labor charges for service, removal, or reinstallation of the wa...

  • Page 36

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