1. Sizing, Installation November 2008
Quietside ODW 099A-199A
Sizing, Installation
November 2008

2. Agenda Product & Features What Size & Flow rates
What’s needed for installation
Gas Pipe Sizing
Hanging on the wall
Water Piping
Condensate piping
Venting
Power wiring
Control Wiring
Start up
Checking operation
Maintenance
Troubleshooting

3. ODW 099A – 199A

4. Line Up 4 models in 2 Chassis sizes
099 & 120 : Smaller capacities designed for lighter demand applications – Condos, apartments, cottages, townhouses or houses where low to medium demand exists
180 & 199 : High capacity for higher demand application - larger residences or any application where “performance bathing or showering” is in place

5. Modulation Range ODW 099A : 18,000 to 99,000 Btu/h

6. Why ODW? Efficiency, Energy Factors above 0.9 (Energy Star approved
Condensing water heater, Flue Gas temperature below 136DegF allows venting in Schedule 40 PVC
Stable Delivered Water Temperatures
Rebates!!!!!!

7. Delivered Water Temperature Control
A stable delivered water temperature is of paramount importance
We have 3 temperature sensors on this unit
Entering Cold Water temperature
Water temperature exiting the Heat Exchangers
Delivered Water temperature

8. Delivered Water Temperature Control
2 Control valves are used
Flow Control Valve
Measure the flow rate through the unit and report back to the main controller
Minimum flow rate for operation is 0.7 GPM

9. Delivered Water Temperature Control
Bypass Control Valve
This valve allows water to flow from supply to delivered water without passing through the heat exchanger

10. Why Bypass Control?
Mixing in some cold water allows for a stable delivered water temperature, no peaks and troughs due to burner modulation
Increases flow rate as we can provide a mixed condition water temperature
Provides flow control in times of extremely high flow rates

11. End Result
Exactemp
Reduced temperature fluctuations compared to competition and previous iterations of Tankless Water heaters

12. Sizing your ODW

13. Sizing is simple
Sizing takes into account the number of fixtures and type of hot water uses in the house, plus the number of occupants
How many, what is the expected flow rate through them, and how many could/will be used simultaneously
Total this and this is your max flow, then……

14. Sizing – Bathing Typical Shower is 2.5 GPM, 1.5 GPM for Lo Flo Heads
Body Sprays : 2 to 2.5 GPM
Roman or Whirlpool Tubs : 4 to 8 GPM
Will any showers or tubs will be running at the same time?

15. Sizing – Other Uses Faucet is 0.75 GPM Dishwasher, 1.5 GPM
Washing Machine, 2 GPM
Will we use Dishwasher, Washing Machine simultaneously with showers etc

16. Sizing
Once we have the number of hot water uses, plus how the lifestyle of the household affects hot water usage we can calculate a maximum flow rate
This number is then used for the second step
Example of sizing
2 people household – 2 baths
Bath 1 : Shower Head – standard flow, Hand Held, Body Sprays
Bath 2 : Shower Head – standard flow
4 Faucets
Washing Machine
Dishwasher

17. What’s the groundwater temp?
Q : Why is that important?
A : For a fixed delivered water temperature the max flow rate available for a given Btu/h varies based on the difference in temperature between the cold water and the required set point
This is called ∆T and is one of the most important items to know when sizing an ODW unit

19. Delivered Domestic Hot Water Temp (DegF)
Performance ODW-099A
Delivered Domestic Hot Water Temp (DegF)
GPM
100
105
110
120
130
140
Min.
Max.
Cold 35
0.5
2.74
0.46
2.54
0.43
2.37
0.38
2.09
0.34
1.87
0.31
1.69
Water 40
0.54
2.97
0.4
2.22
0.36
1.98
0.32
1.78
Temp 45
0.59
3.24
DegF 50
0.65
3.56 55
0.72
3.95 60
0.81
4.45 65
0.92
5.08

20. Delivered Domestic Hot Water Temp (DegF)
Performance – ODW 120A
Delivered Domestic Hot Water Temp (DegF)
GPM
100
105
110
120
130
140
Min.
Max.
Cold 35
0.5
3.32
0.46
3.08
0.43
2.88
0.38
2.54
0.34
2.27
0.31
2.05
Water 40
0.54
3.59
0.4
2.7
0.36
2.4
0.32
2.16
Temp 45
0.59
3.92
DegF 50
0.65
4.31 55
0.72
4.79 60
0.81
5.39 65
0.92
6.16

21. Delivered Domestic Hot Water Temp (DegF)
Performance – ODW 180A
Delivered Domestic Hot Water Temp (DegF)
GPM
100
105
110
120
130
140
Min.
Max.
Cold 35
0.72
4.98
0.67
4.62
0.62
4.31
0.55
3.81
0.49
3.41
0.45
3.08
Water 40
0.78
5.39
0.58
4.04
0.52
3.59
0.47
3.24
Temp 45
0.85
5.88
DegF 50
0.93
6.47 55
1.04
7.19 60
1.17
8.09 65
1.34
9.24

22. Delivered Domestic Hot Water Temp (DegF)
Performance – ODW 199A
Delivered Domestic Hot Water Temp (DegF)
GPM
100
105
110
120
130
140
Min.
Max.
Cold 35
0.72
5.5
0.67
5.11
0.62
4.77
0.55
4.21
0.49
3.77
0.45
3.41
Water 40
0.78
5.96
5.50
0.58
4.47
0.52
3.97
0.47
3.58
Temp 45
0.85
6.50
DegF 50
0.93
7.15 55
1.04
7.95 60
1.17
8.94 65
1.34
10.22

23. Don’t just select the largest unit
Even though it is tempting don’t just select the largest unit available
Unit modulation may cause it to cycle at combinations of very warm incoming water and low water flow rates
Also we need to make sure that the gas supply piping is correctly sized

24. Water Requirements Water Quality
These are the maximum values of the minerals in the water
Having higher levels of these minerals can cause furring of the Heat Exchangers
plus reduced efficiency

25. Water Requirements What to do about Water Quality
Service the unit (frequency dependant on water quality) Or
Treat the water before it enters the water
Several different methods available over the counter

26. What do you get included?
Unit, set up for Natural Gas operation
Unit Controller
Vent Termination kit, including co-axial flue, termination kit
Isolation kit, includes Ball Valves, purge valves and ASME rated Pressure Relief Valve

27. What do you supply?
Gas piping, minimum ¾” but selected for the Btu/h input capacity of the unit
Schedule 40 PVC venting including Elbow and Bird Screen for vent
Water piping from cold supply to unit and hot water piping to house
115V power, power wiring and thermostat wire to the controller(s)

28. Installation basics
Indoor location only – the unit doesn’t like getting wet
Minimum ambient temperature above 45 DegF, even with the freeze protection heaters
Respect the necessary clearances to the front, sides, back, top and bottom of the unit

29. Gas Piping - Basics Natural Gas Pressure - Primary 3.5” to 10.5” WC
LP Gas Pressure - Primary
8” to 13” WC
Gas meter must be capable of supplying total gas demand for the residence
Gas pressures below the minimum will reduce performance
Ensure gas pressure does not drop on initial start or unit may become noisy in combustion
Do not use Flexible Gas Lines unless they are rated for a Minimum capacity of 250,000 Btu/h

30. Gas Piping - Basics Gas pipe size is determined by two factors
Max Input capacity of the appliance connected
Distance from the Gas meter
The larger the appliance and the further away from the meter the larger the gas pipe size

31. Gas Piping - Sizing
Determine where the unit will be installed on the gas pipe
Closer to the meter is always better
If unit is located at furthest point from the meter considering running a dedicated stick of black iron directly from the meter to the ODW

32. Gas Piping - Basics

33. Gas Piping – Sizing

34. Gas Piping - Sizing

35. Gas Piping - Sizing Connection from the stick to the unit
If using flexible gas piping make sure it is capable of supplying a minimum of 250,000 Btu/h
Always install a gas shut off valve and drip leg adjacent to the unit

36. Hanging the unit on the wall
Remove unit from Carton
Unit installs on a hanging bracket (supplied) mounted to studs or wall brace
CANNOT be installed on a combustible wall. Use non combustible backing plate e.g. Durarock or 24g sheet metal

37. Water Piping (cont) Cold Water inlet including strainer
Hot Water outlet

38. Water Piping 2 Connections – Cold In, Hot Out
¾” Isolation Valve package included with the unit
Ball Valves, Purge Valves, 150 Psi Pressure Relief Valve ¾” threaded connection
ODW 099/120 includes a ½” adaptor from the isolation valve kit – but ¾” connection to the house

39. Water Piping (cont)
Isolation Valve kit includes a Pressure Relief Valve to meet code requirements, rated at 150 psi
Pipe PR Valve to building drain or other suitable area
A Temperature Relief Valve is not required unless local codes mandate it – however if one is installed do not install with the probe directly in the water flow

40. Water Piping (cont)
Unit is designed for Potable water only, therefore all piping should be suitable – Copper, PEX (where allowed by code), etc
If the unit is providing potable hot water, it cannot be connected by code to a heating system using non-potable components or chemicals
Make sure cold water feed pressure is above 14 Psi and below 125 Psi – if outside that range installing a pump or de-pressurizing pump

42. I want “Instant” Hot Water!
Recirculation – Based on time or temperature
Pump sized to push water through the unit to remove the cold plug contained in the lines
Taco Dmand system
Unit takes 3 seconds to go from sensing flow to firing. This is a big advantage over other Tankless Water Heaters, reduces cold water sandwiching

44. Condensate Piping
Unlike other Tankless water heaters the ODW is a condensing model
Therefore it will produce condensate which has to be drained away
The condensate siphon inside the unit must be filled prior operating – Without filling flue gases can enter the home

45. Useful advantages of condensing
Lower Flue gas temperatures
ODW maximum flue gas temperature is 136 DegF
This allows venting in Schedule 40 PVC in all states and provinces, with zero clearance
This is a big advantage over other Tankless Water Heaters, required to be vent in single wall stainless steel (which is not B vent)

46. Venting Description – Sealed combustion or Direct Vent
Both Intake and Exhaust air must be provided to the unit
Ø3” for 099 & 120
Ø4” for 180 & 199

47. Venting
Maximum vent length is 45ft equivalent, this is a per pipe length not a total
Maximum 3 Elbows in vent pipe
Each Elbow = 5ft of straight pipe, therefore with 3 Elbows in the system the maximum length of straight pipe is 30ft

48. Vent Connection on unit
Plastic connection to accept either 3” or 4” vent pipe directly on top of the unit
Approved PVC cement is required to bond the two together
Use Hi Temp Silicone seal on the joint to ensure a full seal

50. Vent Piping
Always slope flue pipe back to the unit – 1” in 12” minimum
This allows any condensate produced in the flue pipe to return to the unit and drain through the condensate system
Prevents growth of ice stalactites on the outside of the building penetrations through the building required
Zero Clearance to combustibles

51. Termination Location Vent Termination must be located
Minimum of 12” above grade OR 12” above anticipated snowfall level
10” below eaves or building overhang
12” from windows, openings and other venting
24” clearance in front of the termination
Away from plants, trees, animals

52. Wall Penetration Two penetrations through the building required
Z Dimension ODW is 4 ½”
Z Dimension ODW is 6”

53. Flue Termination Flue termination included – Stainless Steel
Attach to the Flue pipe with the connection provided
Seal around PVC joint and termination with hi temperature Silicone
Seal

54. Termination Cover
Once Flue termination is connected attach the Termination cover to the building
Slide over the flue and Intake pipes (larger opening is for the air intake)
Screw to wall with 4 screws – provided
Seal around flue termination with high temperature Silicone

55. Inlet Air
90 Deg Elbow plus birdscreen – Supplied by installing contractor
Attach to the Flue pipe use PVC adhesive
Must be located with inlet facing downwards to prevent rain/snow/debris entering the unit

56. Other than Sidewall Unit can be vented
Flue and Intake Air from separate barometric planes
i.e – Flue gas vented through one wall, with Intake supplied via a penetration on a different wall

57. Vertical 2 x 45 Deg angles on the flue are mandatory
Prevents any pooling of condensate in the flue pipe
2 x 90 Deg Elbows required on the Intake pipe
Note clearances – if in areas of snowfall ensure air intake is 12” above anticipated snowfall accumulation

58. Power Wiring
Unit is powered from a 115V, 15A dedicated and grounded power supply
Unit has 2 x 3 Amp glass style fuses to prevent damage occurring to the microprocessor or other components dues to power issues
Wire power to unit per local codes regarding connection to the wiring of the unit
Currently this will possibly include adding a junction box adjacent to the unit, depending on local codes

59. Unit Control
Standard control is via a wired controller which can be mounted either adjacent to the water heater or in a bathroom
An optional Priority controller is available for a total of 2 controls on the system

60. Controller Up and Down Buttons set the required hot water
temperature from
the unit
Temperature can
be set from
DegF in 2 DegF
increments or
120, 130, 140, 150
& 160 DegF settings
Factory default is 104
On/Off
Button turns the
Unit On or Off
as required
Priority button
allows the second
thermostat to
override the main

61. Optional Priority Controller
Priority Light is lit.
This allows the
Second thermostat
to override the main
Use if you want a
hotter shower than
allowed for a kid’s
shower
Up and Down
Buttons set the
required hot water
temperature from
the unit different to
that of the main
controller
Temperature can
be set from
DegF in 2 DegF
increments or
120, 130, 140, 150
& 160 DegF settings
Factory default is 104
On/Off
Button turns the
Unit On or Off
as required

62. Wiring Standard Controller
2 Wire Connection
Yellow Wires
Thermostat Wire
No Polarity
20V DC

63. Wiring Priority Controller
2 Wire Connection
Yellow Wires
Thermostat Wire
“Piggy Back”
No Polarity
20V DC

64. Ready for Start Up? Water Piping – Flushed, Leak Free?
Gas Piping – Purged, Leak Free?
Electrical/Control wiring – Ready to go?
Dip Switches set – Huh?

65. Dip Switches? Dip 1 : LP or Natural Dip 2 : Vent length
Dip 3 : Program
Dip 4 : Max Fire
Dip 5 : Min Fire

66. Dip Switch Settings #1 : Fuel Type
Switch ON for conversion to LP from Natural Gas
LP conversion requires replacement of burner assembly
Model
ODW 99
ODW 120
ODW 180
ODW 199
Burners
15 EA
20 EA
Size
LNG : Φ1.48 * 5EA / Φ1.38 * 10EA
LPG : Φ1.12 * 5EA / Φ1.03 * 10EA
LNG : Φ1.65 * 20EA
LPG : Φ1.20 * 20EA

67. LP Gas Conversion
Replace burner manifold assembly with one specific to LP
Change dip switch #1 to ON - tell the unit that it is now LP

68. Dip Switch Settings #2 Vent Length
Switch OFF for Vent lengths less than 16ft
Switch ON for Vent lengths greater than 16ft

69. Dip Switch Settings #3 Set Up Mode
Switch to ON to put the unit into set up mode, change display, check operating parameters

70. Dip Switch Settings #4 & #5 Minimum and Maximum firing rate
Locks the unit in either Minimum or Maximum firing rate

71. Unit Start Up
Once the system is set up, open valves on water connections, allow unit to fill with water and flow water through the unit for 5 minutes
Open Gas Valve and check for leaks
Power up unit, set temperature and open up faucets to allow unit to start and produce hot water

72. Unit Start Up
Unit should now start, operate unit until a steady flow of water is seen at all faucets, showing that air has been removed from the system
Unit should now control to flow and set temperature
If a fault code appears………….

73. Fault Codes Code Fault Description A0 Flow Control Valve (FCV) Faulty
Pseudo Flame A1
By-pass Control Valve (BCV) A9
Freeze Protection In
Combustion Fan Failure AA
Inlet Temp Sensor Failure A3
Communication Error Ab
HX Temp Sensor Failure A4
Over Heat Ac
Delivered Water Temp Sensor A5
Outlet Water Temp Ad
Condensate A6
Ignition Failure AE
Air Pressure Switch A7
Gas Valve Failure AF

74. Fault Codes
All Fault codes with the exception of A5 are a hard lockout, meaning that the power to the unit has to be cycled to reset the system
If the wired remote is broken, removing it and crossing the wires together will allow the unit to run, but with the setpoint of 104 DegF

75. A0 – Flow Control Valve Error
Flow control Valve has 2 functions, sense the flow rate and control to flow to maintain the set temperature
If the flow rate demand exceeds the unit capacity the valve will throttle to maintain set temperature, rather than reducing the delivered temperature and maintain flow

76. A0 – Flow Control Valve Error
A0 will show if the micro commands the solenoid to open or close and it does not, OR
If the signal from the flow sensor cannot be read by the micro
Solution – check connections, replace valve

77. A1 – Bypass Valve Error
Bypass Valve also has 2 functions, act as a mixing valve to provide a stable delivered temperature and also protect the HX from over condensing
Thx > Td + 18~27°F

78. A1 – Bypass Valve Error
A1 will show if the micro commands the valve to open or close and it does not
Both valves are worm drive solenoid style similar to the EEV on a Samsung unit
Solution – Check connections,

79. A2 – Combustion Fan Error
Combustion Fan is a BLDC type fed with 4 wires from the micro
Fan speed varies with capacity, signal is from 5V-45V DC
Fan signals back to the micro, it’s speed and rotation as part of the feedback loop

80. A2 – Combustion Fan Error
A2 fault is caused by the fan either not operating, going backwards or not sending a feedback signal to the Micro
White wire is feedback, should be >100Hz with fan running
Black ~ Yellow is 12V DC, if no voltage is present = faulty micro
Black ~ Red is variable 5V – 45V DC, with the motor disconnected should read 45V DC, connected dependant on capacity
Solution : Check for signal, check for rotation (no winds), check motor resistance, replace either fan or micro

81. A3 – Communication error
Micro and Wired remote communicate together for set point error codes etc
DC voltage 20V DC
A3 is shown when Micro and Controller cannot communicate
Solution : Check wiring between units (not polarity sensitive), replace controller first

82. A4 – Over Heat Error Auto Reset Bi metallic Over Heat Cut Out
Opens at 203°F, closes at 176°F
Normally closed, check with multi-meter
Solution : check strainer, check flow through the unit, flush unit if in hard water area, replace OHC

83. A5 – Outlet Water Temp Error
Sensed by the Delivered Water Temperature sensor
If the Delivered water temp exceeds 203°F the unit will shut down and display A5
Auto Reset, unit will overheat if it is really delivering 203°F water

84. A6 – Ignition Failure
Unit will try to start 3 times before giving this error code
Causes
No Gas
Faulty Gas Valve
Micro problem
Faulty Igniter
Flame Detection

85. A6 – Ignition Failure No Gas
Remove Philips head screw check for gas pressure
If none check SV1 for power (120V AC) and check gas supply
Also there is a master On/Off switch in the unit controlling output to the gas valve, make sure that is ON
Check gas supply outside unit, especially for LP fuelled units

86. A6 – Ignition Failure Faulty Gas Valve
Check voltage to SV1, SV2 and SV3 for 120V AC
If voltage is present, check resistance of SV1, SV2, SV3
SV1 = 1650Ω
SV2 = 1650Ω
SV3 = 1650Ω

87. A6 – Ignition Failure Faulty Gas Valve
Check Voltage to modulating coil should be between 5V DC to 15V DC (Min fire to Max Fire)
MV resistance is 77Ω
If there is zero volts at the Modulating valve gas pressure should still read approx 3/8” WC if SV1 is open

88. A6 – Ignition Failure Microprocessor
No voltage being supplied to either SV1, SV2 or SV3 and the modulating valve is a microprocessor problem
If there is zero volts at the Modulating valve gas pressure should still read approx 3/8” WC if SV1 is open
Voltage to the Igniter, should be 120V AC

89. A6 – Ignition Failure Faulty Igniter
Check voltage to the igniter, primary voltage should be 120V AC
Secondary voltage is 15kV to 18kV
Check Primary/Secondary resistance to ground
Primary : 1MΩ
Secondary : 720Ω

90. A6 – Ignition Failure Flame Detection
Micro sends a 24V AC signal to the flame detector
No Flame is a 0V signal back to the micro
If a Flame is present, should read 0.3µA ~ 1.2µA to ground

91. A7 – Gas Valve Error Faulty Gas Valve Failure of SV1 or SV2 to open
Check voltage to SV1, SV2 and SV3 for 120V AC
If voltage is present, check resistance of SV1, SV2
SV1 = 1650Ω
SV2 = 1650Ω
If voltage is not present, problem lies with the Micro
Solution : Replace whichever component is faulty

92. A8 – Pseudo Flame
Pseudo Flame is where the unit receives a signal from the flame detector either prior to SV1, 2 or 3 opening OR detecting a flame after the unit has shut down
Either faulty flame sensor or Microprocessor, but we can check to make sure no gas is leaking through the gas valve solenoids

93. A9 – Freeze Protection
Freeze Protection occurs when the cold water temperature entering the unit is below 23°F OR -5C
This is to protect the unit against freezing and also against over production of condensate
Unit will restart when the incoming cold water is above 32 DegF

94. AA – Inlet Temperature Sensor
Inlet temperature sensor measures the incoming cold water to the unit
Very important as this helps set the capacity requirement
Error occurs if the sensor is open circuit or out of range, check with multi meter for resistance
40°F = 20,000Ω
50°F = 15,500Ω
60°F = 12,600Ω

95. Ab – HX Temperature Sensor
HX temperature sensor measures the water temp leaving the heat exchangers
Very important as this sets the By Pass valve opening for a stable delivered water temperature
Should measure about 15-20°F higher than delivered water temperature
Error occurs if the sensor is open circuit or out of range, check with multi meter for resistance
120°F = 3,400Ω
140°F = 2,500Ω
160°F = 1,800Ω

96. Ac – Delivered Water Temp Sensor
Delivered water temperature sensor measures the final delivered water temperature to the faucet
This is the temperature seen by the end user
Error occurs if the sensor is open circuit or out of range, check with multi meter for resistance
104°F = 4,900Ω
110°F = 4,200Ω
120°F = 3,400Ω

97. Ad – Condensate Overflow
Unit produces condensate which is collected in a siphon, if the drain is blocked the condensate can back up into the wet recuperative HX, causing issues with airflow and other components
We have an electrode to sense if the siphon is full and stop the unit before this can occur
Micro sends 24V AC signal to electrode which as it is above the water has a resistance of ∞
If the electrode touches the condensate resistance fall to <100Ω and the error occurs

98. AE – Air Pressure Switch
Monitors flue pressure across the unit, compared to atmospheric pressure
Normally closed switch, opens on failure
ODW099 & 120 opens at ½” WC
ODW180 & 199 opens at 5/8” WC
Control voltage 5V DC

99. AE – Air Pressure Switch
Two hoses
#1 – Back of cabinet for atmospheric pressure, very important that no insulation be applied to the back or the unit and the unit is not mounted flush to the wall
#2 – Fan Throat, upper port on the back of the fan
Failure can be due to, blocked flue, flue over max length, vent terminal facing prevailing winds, Condensate backed up into HX’s

100. Freeze Protection 48W Ceramic heaters attached to the water pipes
Thermostat controlled when inlet air temperature drops to 41 DegF

101. Warranty Standard Warranty Residential usage 12 Years Heat Exchanger
5 Years Parts
No labor allowance as standard

102. Website – www.quietside.com
Tech Support
x 3 – West Coast
– East Coast
Website –

103. Thank you
Any Questions