State Industries GP650HTPDT, SHE50-100PE manual Pipe Size Requirements, Maximum Elbow Requirements

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ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL

VENTING (CONT)

Pipe Size Requirements

Ensure the correct size pipe has been used for the overall equivalent length of the vent and intake air piping installed. Longer equivalent lengths require larger pipe sizes, see Table 1.

Maximum Elbow Requirements

Three and four inch vent and intake air pipe installations allow a maximum of 6 - 90° elbows in the vent pipe AND a maximum 6 - 90°elbows in the intake air pipe. Two inch installations allow a maximum of 3 - 90° elbows in the vent pipe AND a maximum 3 - 90° elbows the intake air pipe.

Table 1

NUMBER

2” MAXIMUM PIPE

3” MAXIMUM PIPE

4” MAXIMUM PIPE

90° ELBOWS

LENGTH FEET (METERS)

LENGTH FEET (METERS)

LENGTH FEET (METERS)

 

 

 

 

1

20 (6.1)

60 (18.3)

120 (36.6)

2

15 (4.6)

55 (16.8)

112 (34.1)

3

10 (3.0)

50 (15.2)

104 (31.7)

4

4 elbows not allowed in 2” pipe

45 (13.7)

96 (29.3)

(use larger pipe size)

 

 

 

 

 

 

 

5

5 elbows not allowed in 2” pipe

40 (12.2)

88 (26.8)

(use larger pipe size)

 

 

 

 

 

 

 

6

6 elbows not allowed in 2” pipe

35 (10.7)

80 (24.3)

(use larger pipe size)

 

 

 

 

 

 

 

Service Notes - Venting

Remove all plastic debris from the edges of intake air pipe sections after cutting on direct vent installations. Plastic debris left on intake air pipe sections can collect inside and clog the burner and lead to rough operation and/or ignition failure. See Service Notes page 11.

Using a smaller pipe size than required for a given length or installing more elbows on the vent pipe can cause the water heater’s control system to declare a fault condition, lock out and display the “Blocked Exhaust” fault message on the UIM display (see page 27).

Overlooking the same requirements for the intake air pipe on direct vent installations or failing to remove the screen from the intake air connection when direct venting can cause the water heater’s control system to declare a fault condition, lock out and display the “Blocked Inlet” fault message on the UIM display (see page 27).

Remove This Screen

For Direct Vent

Installations

The screen inside the intake air connection is meant to keep larger debris from entering the blower when the water heater is installed conventionally; using room air for combustion.

When the water heater is installed in a direct vent configuration the screen inside the intake air connection on the water heater must be removed. If left in place it will become clogged over time and lead to “Blocked Inlet” lock out conditions.

The screen on the intake air termination will keep larger debris from entering the blower on direct vent installations.

Technical Literature Department

7 of 52

Ashland City, TN © 2008

Servicing should only be performed by a Qualified Service Agent

 

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Contents Service Handbook Ultra High Efficiency Power VENT/POWER Direct Vent Important Service Reminder Qualifications Qualified Service AgentService Warning Tools Required Closed Water Systems Thermal ExpansionAIR Requirements Contaminated AIRVenting Maximum Equivalent Length RequirementsService Notes Venting Pipe Size RequirementsMaximum Elbow Requirements Number Maximum Pipe Elbows Length Feet MetersService Notes Electrical VAC 1Ø Power SupplyCorrectly Wired Outlet Electrical RequirementsHOW IT Works Internal ViewService Notes Blower BlowerService Notes Burner Flame Sensor BurnerBurner & Blower Removal On NextService Notes Blower Flange & Blower Adapter Gaskets Burner/Blower RemovalVenturi BlowerGasket Orifice GAS ValveGas Valve Removal GAS Pressure Testing Service Notes Checking Gas PressuresGas Pressures Service Notes Gas Pressure AdjustmentGAS Pressures AIR Pressure Switches Normal State Activated StateBlocked Exhaust Switch Blower Prover SwitchBlocked Intake Switch AIR Pressure Switch Operation Blower Prover FailureOperational State Test AIR Pressure Switch TestingNormal State Test Blower Prover Blocked Intake Blocked Exhaust Air Pressure Switch ParametersPressure Test Page Flame Sensor Flame Sensing TestMeasuring Flame Sensing Current Service Notes Hot Surface Igniters Igniter Current TestControl System Features IntroductionService Notes Button Pad Ribbon Cable UIMCommercial & Residential Product Differences Discreet Menu Contact InformationService Note Sequence of Operation Display Desktop ScreenStatus Icons Status Icon DescriptionOperational States Modes State DescriptionOperating SET Point Adjustment Action DisplayControl System Menus ECO Service Notes CCB Replacement CCBJ10 J13 J15 J11 J16 Socket IdentificationJ3 Socket 120 VAC Power Supply J1 Socket TransformerJ2 Socket 120 VAC To Blower PIN # DescriptionRetry Ext Use Yes Input Type Tstat OpenWiring Diagram Service Notes Polarity & GroundSequence of Operation YESResetting the control system Important Service ReminderRough Starting Rough Operation Note Heater Status MenuControl System Unresponsive UIM Display Is BlankUIM is Inoperable Displayed Message CHECK/REPAIR CONDITION/INDICATESFault Messages AC ReversedFlame Probe Short Upper Probe ShortFlame Detect Error Energy Cut Out ECOBlocked Inlet Blocked Exhaust Vent Turned on and a Call for Heat Active Perform ALL These Tests with PowerBlower Prover Open Low Igniter Current Ignition Failure Rough Starting Rough Operation NoteCheck for 24 VAC to the Gas Valve solenoid coil Gas Valve Failure Communication FailureTennessee Waltz Parkway Ashland City, TN