John Wood 40 gal. Installation And Operating Instructions Manual Download Page 23

 OPERATING INSTRUCTIONS

CAUTION:

Read before proceeding. If you do not

follow these instructions exactly, a 

fi

 re or 

explosion may result, causing property 

damage, personal injury or loss of life.

This appliance is equipped with an ignition 

device that automatically lights the burner.

Do not try to light manually with

a match or 

fl

 ame.

 Temperature Regulation

This water heater’s intended purpose is to heat water. Hot 
water is needed for cleaning and sanitizing (bodies, dishes, 
clothing etc.). Untempered hot water can present a scald 
hazard. Depending on the time element and the people 
involved (adults, children, elderly, in

fi

 rm etc.) scalding may 

occur at different temperatures.
It is recommended that lower temperatures be used to avoid 
the risk of scalding. It is further recommended that the water 
temperature be set for the lowest temperature that will satisfy 
your hot-water needs. This will also provide the most energy 
ef

fi

 cient operation of the water heater.

Short, repeated heating cycles caused by small water uses 
can cause temperatures at the point-of-use to exceed the 
thermostat setting by up to 17°C (30°F). This condition is 
referred to as “stacking”. If you experience this type of use you 
should consider using lower temperature settings to reduce 
scald hazards.
Valves for reducing the point-of-use temperature by mixing 
cold and hot water are available.

DANGER

Water temperature over 52°C (125°F) can cause 
severe burns instantly or death from scalds.
Children, disabled and elderly are at highest risk of 
being scalded.
Feel water before bathing or showering.
Temperature limiting valves are available.

 Mixing Valves

Hot water can scald:

 Water heaters are intended to produce 

hot water. Water heated to a temperature that will satisfy space 
heating, clothes washing, dish washing, and other sanitizing 
needs can scald and permanently injure you upon contact. 
Some people are more likely to be permanently injured by 
hot water than others. These include the elderly, children, the 
in

fi

 rm, and physically/mentally handicapped.

If any one using the hot water 

fi

 ts into one of these groups 

or if there is a provincial or local code requiring a certain 
temperature water at the hot water faucet, then you must take 
special precautions. In addition to using the lowest possible 
temperature setting that will satisfy your hot-water needs, a 
means such as a mixing valve, should be used at the hot-water 
faucets or at the water heater. Mixing valves are available at 
plumbing supply or hardware stores. Follow manufacturer’s 
instructions for installation of these valves. Before changing 
the factory settings on the thermostat, read the “Temperature 
Regulation” section in this manual.

WARNING

Never allow small children to use a hot-water 
faucet, or to draw their own bath water. Never 
leave a child or impaired person unattended 
in a bathtub or shower. Scald burns can re-
sult.

WARNING

Scald burns occur in under one second with 
71°C (160°F) water, which the thermostat will 
deliver if the temperature is set at “VERY 
HOT”. Lower settings of the temperature will 
reduce the risk of scald and will reduce your 
fuel bill.

WARNING

Risk of scalding

Hot water can produce third degree burns
 

in 6 seconds at 

60°C (140°F)

 

in 30 seconds at  54°C (130°F)

 

in 5 minutes at 

49°C (120°F)

 

– 23 – 

Summary of Contents for 40 gal.

Page 1: ...n in these instructions is not followed exactly a fire or explosion may result causing property damage per sonal injury or death Do not try to light any appliance Do not touch any electrical switch do...

Page 2: ...Relief Valve The Discharge Line Relief Drain Tube Temperature Pressure Relief Valve and Pipe Insulation Electrical Supply 19 SAFETY LOCKOUTS 21 High Limit Controls 21 Thermostat Water Temperature Blow...

Page 3: ...combination with space heating applications User Responsibilities This manual has been prepared to acquaint you with the installation operation and maintenance of your gas fired water heater and provi...

Page 4: ...able liquids or vapours have spilled or leaked in the area of the water heater leave the area immediately and call the fire department from a neighbor s home Do not attempt to clean the spill until al...

Page 5: ...r and your safety Since we cannot put everything on the first few pages READ ENTIRE MANUAL BEFORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER After installation dispose of packaging material in...

Page 6: ...if in an alcove or closet installation the entire floor must be covered by the panel Clearances and Accessibility DO NOT BLOCK AIR INTAKE OR SENSOR ACCESS ENSURE ADEQUATE CLEARANCE FOR AIR SUPPLY FRON...

Page 7: ...s than 14 in w c 3 5 kPa the water heater must be isolated from the gas supply piping system by closing its manual shut off valve 1 2 3 4 WARNING Exposure to a higher gas supply pressure may cause dam...

Page 8: ...r Tubing see Figure 9 26 Rubber Coupling 27 Gear Clamp 28 Flue Collector 29 Hot Water Outlet Nipple 30 Anode under cap 31 Cold Water Inlet Nipple 32 Flexible Manifold Tube see Figures 6 7 33 Viewport...

Page 9: ...d as the primary water inlet and outlet connections For your convenience plugs are installed in these fittings at the factory Remove these plugs if needed for your specific installation Otherwise as w...

Page 10: ...ETAL DRAlN PAN 150mm 6 MAX AIR GAP TO SUITABLE DRAIN NOTE THE T P VALVE CAN BE PIPED DIRECTLY TO THE DRAIN Figure 12 Mixing Valves Water heaters are intended to produce hot water Water heated to a tem...

Page 11: ...can experience high ambient environments include closets alcoves areas under staircases attics especially in metal roofed buildings areas with restricted air movement rooms with large solar gains meta...

Page 12: ...less VENT LENGTH LESS THAN OR EQUAL TO 20 EQUIVALENT FT 6 1 METRES USE THIS SCREEN SUPPLIED VENT LENGTH GREATER THAN 20 EQUIVALENT FT 6 1 METRES USE THIS SCREEN SUPPLIED Figure 14 Rodent Screens A ve...

Page 13: ...ene Vent Pipe Size Elbow Type Short Sweep Short Radius Long Sweep Long Radius Notes 1 Use long radius elbows where possible Minimum distance between 90 elbows should be 6 150mm wherever possible 2 Ven...

Page 14: ...nt piping to ensure adequate drainage Horizontal vent pip ing must not sag to form valleys where condensate may collect Vertical venting shall be supported every 1 5m 5 ft CAUTION Use of Solvent Cemen...

Page 15: ...sure the plastic tubing is not folded anywhere between the pressure switch and the blower housing 5 This water heater is a polarity sensitive appliance and will not operate if the power supply polari...

Page 16: ...iping is firmly secured in the coupling and is gas tight Do not over tighten or cause distortion of any of the parts Ensure the bottom of the rubber coupling is firmly seated on the blower outlet and...

Page 17: ...S 200mm 8 in LOOP TO DRAIN BLOWER ASSEMBLY Figure 26 Water Supply Piping Installation Piping fittings and valves should be installed according to the installation drawing Figure 27 Water supply pressu...

Page 18: ...ING VALVE SET TO 49 C 120 F FOLLOW THE TEMPERING VALVE MANUFACTURER S INSTRUCTIONS T P VALVE AND DISCHARGE LINE COLD WATER TEMPERED WATER TO FIXTURE Figure 28 Closed System Thermal Expansion Water sup...

Page 19: ...ely close the cold water inlet to the water heater follow the draining instructions in this manual and replace the temperature pressure relief valve with a properly rated sized new one Temperature Pre...

Page 20: ...Verify proper opera tion after servicing Note Always reference the wiring diagram for the correct electrical connections WARNING When the unit is plugged in 120VAC is pres ent at the electric connecti...

Page 21: ...ontrol will flash the gas lockout code Refer to the System Error Codes section of this manual for an explanation of the codes applicable to the control installed on your water heater If this error occ...

Page 22: ...possible gas leaks Vent Pipe System 1 Vent pipe and fittings of approved material 2 Acceptable size length and number of elbows on exhaust vent system 3 Installed in accordance with the latest edition...

Page 23: ...eel water before bathing or showering Temperature limiting valves are available Mixing Valves Hot water can scald Water heaters are intended to produce hot water Water heated to a temperature that wil...

Page 24: ...ition 9 Turn thermostat to desired setting DANGER Hotter water increases the risk of scald injury Consult the instruction manual before changing temperature 10 If the appliance will not operate follow...

Page 25: ...e water heater Mixing valves are available at plumbing supply or hardware stores see Figure 11 12 Follow manufacturer s instructions for installation of the valves Before changing the factory setting...

Page 26: ...should be considered normal Sediment buildup in the tank bottom will create varying amounts of noise and may cause premature tank failure Drain and flush the tank as directed under Draining and Flush...

Page 27: ...Presence of flammable or corrosive materials in the installation area Presence of combustible materials near the water heat er Verify proper operation after any service is performed on this water hea...

Page 28: ...supply proper clearances from the water heater must be maintained See Locating the New Water Heater section Combustible materials such as clothing cleaning materials or flammable liquids etc must not...

Page 29: ...so you can access to the anode head Figure 39 Keep in a safe place for reinstallation later Remove the anode rod by using a ratchet and a 1 1 16 socket turning counter clockwise Figure 39 1 2 3 4 5 6...

Page 30: ...blower wheel This can be problematic especially where condensation is present as particles may adhere to the venting sur faces These conditions can result in nuisance failures In areas that have a hig...

Page 31: ...venter in the cold water line an expansion tank of adequate size must be installed Combo Heating Systems require higher water tem peratures than other applications When the system is used to supply wa...

Page 32: ...y air Low gas pressure Orifice too small Thermostat set too low Heater too small Wrong piping connection Wasted hot water Flue clogged Air inlets blocked 1 2 3 4 5 6 7 8 9 Provide ventilation to water...

Page 33: ...treatment if needed Refer to Condensate section 1 2 WATER LEAKAGE Condensation Dripping Temperature Pressure Relief Valve Thermostat does not shut off Drain valve dripping leaking Tank Leak 1 2 3 4 5...

Page 34: ...p requires manual intervention and can not be reset by cycling power to the control A manual reset requires turning the temperature setting dial to the lowest coldest position for a minimum of 10 seco...

Page 35: ...ht dim Call For Heat no fault conditions One Flash three second pause Low Flame Signal control continues to operate Two Flash three second pause Pressure Switch Failed Closed Three Flash three second...

Page 36: ...System Return Inlet Optional 19 Air Inlet Snorkel 20 Combo Heating System Supply Outlet Optional 21 Blower with Power Cord see Figure 49 22 Air Switch inside box see Figure 49 23 Junction Box see Fig...

Page 37: ...5 40 41 Natural gas and Propane main burner with igniter assembly for 60k to 75k Btu hr models Flare Nut Figure 47 17 Figure 48 25 23 24 22 5 26 27 Figure 49 Notes Natural gas models have Right hand t...

Page 38: ...e water heater s Model Number SKU Serial Number date of purchase and date of installation c THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF THIS EXPRESS WARRANTY IS WHER...

Page 39: ...cy beyond the control of the Manufacturer or s The water heater is installed in a closed system without adequate provision for thermal expansion 3 Except when speci cally prohibited by the applicable...

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