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When hot water is drawn from the tank in frequent 
short bursts, a condition known as “stacking” is created. 
“Stacking” is the result of increased cycling of the burner 
and can produce very hot water temperatures at the hot 
water outlet. Always remember to check the hot water 
coming out of any faucet with your hand before use. This 
will reduce the risk of scalding-related injuries. 
The gas control pictured in this manual is equipped with a 

resettable type automatic high temperature cut-off. Should 

the temperature of the water exceed 195°F (91°C), the high 

temperature cut-off will automatically shut off the gas supply 

to the water heater. If this situation occurs, the gas control 

must be reset by a qualified service technician.

DANGER

WARNING

CAUTION

AVERTISSEMENT

ATTENTION

Should overheating occur or the gas supply fail to shut-

off, close the gas supply manual shut-off valve. Failure 

to follow this instruction can result in property damage, 

personal injury, or death.

Out of Fuel

If your water heater should run out of gas, proceed as 
follows:

1) Toggle the “ON/OFF” switch located on the gas control 

to the “OFF” position. 

2) Unplug the power cord from the wall socket.
3) Close the gas supply manual shut-off valve.
4)  Once the gas supply has been re-established, proceed to 

the 

Operating Instructions

.

Housekeeping

Keep the area around the water heater clean and free of dust, 
lint, and dirt. Make sure that all of the minimum clearances 
to combustible materials are being maintained.

DANGER

WARNING

CAUTION

AVERTISSEMENT

ATTENTION

DO NOT

 store or use gasoline or other flammable vapours 

and liquids around the water heater.

DO NOT 

put or store any objects on the top of the water 

heater.  Failure to follow these instructions can result in 

property damage, personal injury, or death. 

Flammable Vapour Sensor

This water heater is equipped with a flammable vapour 

sensor (FV) that will shut it down in the event of a flammable

 

vapour incident. It is a safety feature that may prevent 

property damage, personal injury, or death.
The FV sensor is located on the front left bottom of the 

exterior casing of the water heater. The FV sensor is 

protected from shock and contaminants by a robust plastic 

cover. The function of the FV sensor is to detect the presence 

of flammable vapours before they enter the combustion 

chamber and ignite. If the FV sensor detects the presence 

of flammable vapours while the water heater is operating, 

the gas control will switch to lock-out mode and the water 

heater will shut down. If the water heater is not operating 

when the flammable vapours are detected, the control will 

switch to lock-out mode and prevent the water heater from 

lighting. 
After a flammable vapour incident has occurred and the 

flammable vapours have dissipated, the FV sensor is 

designed to automatically reset itself. The Intelli-Vent

 gas 

control however, will have gone into lock-out mode and will 

need to be manually reset. A qualified service technician 

must be called to determine if flammable vapours entered 

the combustion chamber and ignited. In most instances, 

there will not have been ignition of flammable vapours inside 

the combustion chamber because the FV sensor will have 

detected these vapours and shut down the water heater. In 

this case, the Intelli-Vent

 gas control can be reset and the 

water heater may resume normal operation. On the other 

hand, if the flammable vapours ignited inside the combustion 

chamber, the water heater may need to be replaced. The 

technician will be able to determine whether or not the 

water heater needs to be replaced based on the amount of 

flammable vapours that entered the combustion chamber 

and the damage to the water heater from the resulting fire.

Condensation

As moisture from the products of combustion comes into 
contact with the cold surface of the inner tank, it may 
condense. This situation will usually occur:

1)  When the water heater is filled with cold water for the first 

time.

2)  If the water heater has been undersized.
3) When large amounts of hot water are drawn from the 

water heater in a short period of time, and the refill water 
is very cold.

Due to the high-efficiency rating of this gas-fired water 
heater, it may produce more condensation than older 
models. Condensation forming on the flue tube will drop on 
the burner making a “sizzling” sound. This condition is not 
uncommon and must never be misinterpreted as a leaking 
tank. It will disappear once the water becomes heated.
Because of the large amounts of water that can condense, it 
is very important that a drain pan be installed under the water 
heater (

refer to Figure 8

). 

Under no circumstances 

is the manufacturer to be held liable for any water 
damage, in connection with this water heater

If the problem does not go away and water continues to 
drip after the water heater has heated up, check all of the 
plumbing connections to make sure they are not leaking. 

GENERAL MAINTENANCE

Summary of Contents for UG40

Page 1: ...r appliance WHAT TO DO IF YOU SMELL GAS DO NOT try to light any appliance DO NOT touch any electrical switch DO NOT use any phone in your building From a neighbour s phone immediately call your gas supplier Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the g...

Page 2: ...er les endroits humides et les températures sous le point de congélation Si le détecteur décèle la présence de vapeurs inflammables le contôle au gaz se vérouillera et le chauffe eau cessera de fonctionner Ne tentez pas de le remettre en marche Faite inspecter le chauffe eau immédiatement par un technicien de service qualifié ou le fournisseur de gaz ATTENTION Safety Information 3 Installation Ins...

Page 3: ...risk of injury and tell you what will happen if the instructions are not followed This is the safety alert symbol This symbol alerts you to potential hazards that can kill or hurt you and others All safety messages will follow the safety alert symbol and either the word DANGER or WARNING Serious injury or death can occur if you do not follow the instructions immediately Serious injury or death can...

Page 4: ... floor However should this water heater be installed directly on carpeting the carpeting must be protected by a wood or metal panel beneath the water heater This panel must extend at least three 3 inches 7 6 cm beyond the width and depth of the water heater Should the water heater be installed in an alcove or closet the entire floor area must be covered by the panel Minimum Clearances The minimum ...

Page 5: ...tes see Figure 4 This water heater must be vented directly to the outdoors either horizontally through the wall or vertically through the roof The venting must not be attached to an existing chimney or in com mon with any other appliance and must not be insulated If pos sible locate the water heater so that the venting length and number of elbows are kept to the minimum necessary to reach the outs...

Page 6: ...rubber transition fitting and in every case before the first elbow Vent System Adaptor Drain Outlet Rubber transition fitting Rubber transition fitting Vent System Adaptor Drain Outlet Rubber transition fitting Increaser Adaptor 2 X 3 Increaser Adaptor 2 X 3 Rubber transition fitting Adaptateur du système Vent System Adaptor Drain Outlet Rubber transition fitting Rubber transition fitting Vent Sys...

Page 7: ...m the center line of the terminal E Clearance to unventilated soffit F Clearance to outside corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly I Clearance to regulator vent oulet 3 feet 91 cm from the regulator vent outlet and 3feet 91 cm horizontally from the vertical center line of the regulator vent outlet to a maximum vertical di...

Page 8: ...ermination elbow shall be equipped with a standard wire mesh screen Connect and secure all piping and elbows from the power venter to the wall When the installation is completed the vent and air intake terminals must be at two 2 inches 5 1 cm from the exterior surface of the wall see Figure 2 Do not extend vent or air intake piping past this length Make sure that all piping is properly supported I...

Page 9: ...th a plumbing roof boot or equivalent flashing Make sure that all piping is properly supported If the venting will pass through an enclosed area make sure to leave at least one 1 inch 2 5 cm clearance around the piping for air circulation Figure 8 Clamp or Strap Not included field supplied 1 2 5 cm Min 2 5 cm Max Exhaust voir codes locaux Coude optionnel Exhaust 12 30 5 cm min above grade or antic...

Page 10: ...shing Vent Termination elbow Short piece of pipe Street Elbow Clamp or strap Air intake Roof Min 18 in 46 cm above roof or 12 in 30 5 cm above anticipated snow level whichever is the highest and max 24 in 61 cm above roof without additional support Entrée d air Air intake Exhaust Entrée d air Sortie Not included field Supplied Not included field Supplied Figure 9 de Flashing Short piece of pipe St...

Page 11: ...g cannot exit through the wall at a height greater than or equal to twelve 12 inches 30 5 cm above ground level or anticipated snow level the installation must be modified to include a vent riser as shown in Figure 11 The maximum equivalent length of vent pipe including the vent riser must be in accordance with the specifications in this manual In cold environment where conditions present a risk o...

Page 12: ...1 cm black restric tor screen when total equivalent length is twenty five 25 feet 7 6 m or less otherwise a standard wire mesh screen shall be installed If using the three 3 inch 7 6 cm concentric vent system from IPEX be sure to install the three 3 inch 7 6 cm black restrictor screen when total equivalent length is eighty 80 feet 54 9m or less otherwise a standard wire mesh screen shall be instal...

Page 13: ...e the COLD water inlet and the HOT water outlet These fittings are both 3 4 NPT male thread Make sure that the dip tube is installed in the cold water inlet Install a shut off valve close to the water heater in the cold water line It is recommended that unions be installed in the cold and hot water lines so that the water heater can be easily disconnected if servicing is required When assembling t...

Page 14: ... is obtained 4 Check all of the plumbing connections to make sure there are no leaks Gas Connections DANGER WARNING CAUTION AVERTISSEMENT ATTENTION DO NOT attempt to use this water heater with any gas other than the type of gas shown on the water heater rating plate Failure to follow this instruction can result in property damage personal injury or death The gas piping must be installed as indicat...

Page 15: ...1 All piping and components that are used in the system must be of a nonferrous type suitable for potable water This also applies to any sealant used 2 When used as a dual purpose water heater it must not be connected to any system that has been previously used for non potable water heating This includes any piping because in all probability existing piping would have been in the past treated with...

Page 16: ...itch Vacuum Switch N O Vacuum Switch N C Blower Unit Power Cord Hot Surface Ignitor Flame Sensor Gas Control Capacitor Flammable Vapor Sensor High Limit Switch Vacuum Switch N O Vacuum Switch N C Cordon d Alimentat Condensateur Interrupteur Haute Limite Interrupteur de Pression Négative N O Interrupteur de Pression Négative N F Unité d évacuation Unité d évacuation Cordon d Alimenta Condensateur I...

Page 17: ...g been secured with the appropriate primer and solvent based cement when necessary Has the venting been supported at the proper intervals Have precautions been taken against condensation flowing into the power venter Water Piping Is the dip tube installed in the cold water inlet Has a temperature and pressure relief valve been installed Does this valve have a discharge line installed and is it pip...

Page 18: ... Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water A B Q 1 STOP Read the safety information above to the left on this label 2 Toggle the ON OFF switch located on the gas control to the ON position 3 Set the thermostat to the lowest setting by pressing the COOLER and HOTTER buttons at...

Page 19: ...52 130 54 135 57 140 60 145 63 150 66 160 71 APPROXIMATE TIME TO CAUSE INJURY N A 5 Minutes 30 Seconds 5 Seconds 1 5 Seconds Under 1 Second DISPLAY CLIGNOTANT TEMPÉRATURE APPROXIMATIVE F C 70 21 Vacances 110 43 115 46 120 49 125 52 130 54 135 57 140 60 145 63 150 66 160 71 TEMPS NÉCESSAIRE POUR CAUSER UNE BRÛLURE S O 5 minutes 30 secondes 5 secondes 1 5 seconde moins d une seconde AFFICHAGE Figure...

Page 20: ... the presence of flammable vapours while the water heater is operating the gas control will switch to lock out mode and the water heater will shut down If the water heater is not operating when the flammable vapours are detected the control will switch to lock out mode and prevent the water heater from lighting After a flammable vapour incident has occurred and the flammable vapours have dissipate...

Page 21: ...iminated or reduced by changing the anode to aluminum anode combined with zinc pellets and by chlorinating the water heater and the plumbing system If the problem persists special filtration equipment may be required Under no circumstances is the anode to be removed from the water heater on a permanent basis Removal of the anode will lead to premature failure of the water heater and void the warra...

Page 22: ... the installer of the water heater or the local gas utility 3 If you still cannot solve the problem contact the manufacturer s Customer Service Department by e mail at service giantinc com or toll free at 1 800 363 9354 option 1 To help serve you in a quick and efficient manner always have the following information ready a Model number b Serial number c Date of installation d Where the water heate...

Page 23: ...ective Cover 4 Ignitor Assembly 5 Burner Assembly 6 Inner Access Doors 7 Outer Access Door 8 Brass Drain Valve 9 Overflow Tube 10 Closed end dip tube with heat trap 11 Magnesium Anode 12 Temperature Pressure Relief Valve 13 Flue Baffle 14 Inlet Rubber Adaptor 15 Vacuum Switch Inlet 16 Vacuum Switch Outlet 17 High Limit Switch 18 Rubber transition fitting 19 Blower Assembly 20 Outlet Nipple with heat...

Page 24: ...good working condition 5 Low voltage to the water heater Check and repair 7 The gas valve driver circuit 1 Turn off the power to the water heater for 10 seconds and then back on 2 If the above step did not clear the error replace the gas control 8 The internal microcomputer 1 Turn off the power to the water heater for 10 seconds and then back on 2 If the above step did not clear the error replace ...

Page 25: ... gas utility company Defective gas control Replace with new gas control High operating costs Gas control set too high Turn temperature dial to desired temperature Sediment or lime in tank Drain Check to see if water treatment is necessary Water heater is undersized Install size of water heater that meets demand Wrong piping connections Correct piping dip tube must be in cold inlet Leaking faucets ...

Page 26: ...lled for first time Let water heater warm up Problem should go away If it per sists check all plumbing connections for leaks Heavy draws of hot water with very cold refill water Let water heater warm up Problem should go away If it persists check all plumbing connections for leaks Water heater is undersized Install size of water heater that meets demand Combustion odours Insufficient secondary air...

Page 27: ...1 60 153 14 3 4 37 61 1 4 156 70 1 2 179 20 51 8 20 19 5º 90 0º 29 74 All UG50 9 3 8 24 50 3 8 128 58 5 8 149 14 3 4 37 59 3 4 152 69 175 22 56 8 20 17 4º 90 0º 29 7 8 76 All UG60 9 3 8 24 50 1 4 128 58 5 8 149 14 3 4 37 60 1 8 153 69 1 8 176 24 61 8 20 15 6º 90 0º 32 81 J G K H B E F C D A I 27 ...

Page 28: ... valves etc 10 To any damage caused by not having the unit installed adjacent to a free flowing drain or in a pan or basin connected to such free flowing drain 11 For all equipment operated at water temperatures exceeding the maximum operating setting of the thermostat and or the high limit control at a pressure exceeding the one listed on the rating plate for equipment subject to a water hammer e...

Page 29: ...ected to such free flowing drain 11 For all equipment operated at water temperatures exceeding the maximum operating setting of the thermostat and or the high limit control at a pressure exceeding the one listed on the rating plate for equipment subject to a water hammer effect that reverses the bottom of the tank units that are installed in a closed looped system without any adequate expansion ta...

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