Raypak HD401, HD101 operating instructions Start-Up, Main Burner Adjustment

Page 38

Check the Gas Supply Pressure

1.Slowly turn on main gas shut-off valve.

2.Read the gas supply pressure from the manome- ter; minimum supply pressure is 4 in. WC, recommended supply is 7 in. WC for natural gas (minimum 11.0 in. WC for LP gas).

3.If pressure is > 14 in. WC, turn off the valve.

4.Check if the service regulator is installed and/or adjust the service regulator.

Start-Up

Blower Adjustment

1.A nylon tee fitting is connected with hoses in-line with the air pressure switches. Disconnect the plugged side and connect a manometer.

2.Close the gas valve.

3.Turn power on.

4.During startup or Lo-Fire, the air pressure should read 0.5±0.05 in. WC. During Hi-Fire, the reading should be between 0.9 in. WC and 1.0 in. WC. If these are not the obvserved manometer readings, adjust the air shutter on the blower to attain the correct values. (See Fig. 4, air shutter adjustment, on page 7).

5.Turn power off.

6.Reinstall rubber plug on tee.

Main Burner Adjustment

1.Turn off unit.

2.Open manual firing valve.

3.Turn on the unit, wait 15 seconds, and the igniter should glow. There’s a sight glass to check igniter at both ends of the heater. Gas valve should be open after 45 seconds.

4.If burner does not light on first trial. It will retry, up to 3 times.

5.Main burner ignition – check manifold gas pres- sure at gas valve manifold pressure tap. (See Table O).

6.If the pressure reading differs by more than the tol- erance given, adjust the gas valve accordingly. See gas valve adjustment section below for instructions.

 

Gas Valve Adjustment

 

 

 

 

Firing

 

Gas Valve

 

Gas Type

 

 

 

 

 

 

 

 

Natural

 

LP/Propane

 

 

 

 

 

 

 

Stage

 

 

 

+/- 0.1"WC

 

+/- 0.1"WC

 

 

Hi-Fire

 

Invensys

 

3.3" WC

 

 

 

 

 

 

 

 

 

 

 

Honeywell or

 

 

 

 

 

 

 

 

3.1" WC

 

9.6" WC

 

 

 

 

White-Rodgers

 

 

 

 

Lo-Fire

 

Invensys

 

1.2" WC

 

 

 

 

 

 

 

 

 

 

 

Honeywell or

 

1.4" WC

 

3.6" WC

 

 

 

 

White-Rodgers

 

 

 

 

 

 

Table O: Gas

 

Valve Pressures

 

 

 

Honeywell Gas Valve

1.While the heater is running, remove plastic cap located behind ON/OFF knob.

2.Locate the HI or LO screw to adjust.

3.Using a small flat screwdriver, turn clockwise to increase and counterclockwise to decrease mani- fold pressure. See nominal gas valve manifold settings in Table O above.

4.Replace plastic cap when pressure is set.

White Rodgers Gas Valve

1.While the heater is running, locate the HI or LO cap located adjacent to ON/OFF switch.

2.Remove the appropriate cap.

3.Using a flat screwdriver, turn clockwise to increase and counterclockwise to decrease manifold pres- sure. See nominal gas valve manifold settings above.

4.Replace cap(s) when pressure is set.

Invensys (Model HD401 Natural Only)

1.Turn heater off.

2.Locate and remove the Torx tamper resistant screw. (Shown in Fig. 31)

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Contents Installation & Operating Instructions Deletions None Contents Are important but not related to personal injury hazards Product Receipt Before InstallationInstallations at Elevation Model IdentificationComponent Locations Component Locations Angle ViewGeneral Information Quantity of Burners Vent Size FlueWater Time to Produce Serious Temp Burn General SafetyTime/Temperature Relationships in Scalds Indoor/Closet Installations InstallationInstallation Codes Equipment BaseOutdoor Installations Minimum Installed Service Clearance Outdoor InstallationsCombustion and Ventilation Air Conventional Combustion Air SupplyGeneral Installations in CanadaWater Piping Reversing Water Connections Relief Valve PipingHydronic Heating Maximum 4 times the pipe diameter or 12, whichever is less Three-Way Valves Domestic Hot Water PipingPiping-Heating Boilers Air-Separation/Expansion TankGas Supply Gas Supply ConnectionGas Supply Pressure Electrical Power ConnectionsGas Pressure Regulator Heater transformer. do not attach line voltage toMaking the Electrical Connections Check the Power SourceSurge Protection Table H Maximum Equivalent Pipe LengthElectrical Connections Domestic Hot Water Conduit should not be used as the ground. ThereVenting Definition of Appliance CategoriesVent Terminal Location Barometric DamperSupport of Vent Stack Table J Vent/Air Inlet Termination Clearances US Installations Venting Installation Tips Venting ConfigurationsNatural Draft Vertical Venting System Installation Natural Draft Vertical Vent TerminationAppliance Certified Inches Length feetHorizontal Thru-wall Direct Vent Termination Venting Air Intake Category ModelCombustion Air Inlet Inches LengthVenting Height feet Model Appliance CertifiedMin./Max. Vertical Combustion Air Inlet Length Material Inches Min Max FeetVertical Direct Vent Termination Outdoor InstallationVertical Direct Vent System Installation Controls High Limit Manual ResetHigh Limit Auto Reset Optional Ignition Control ModuleLow Water Cut Off Optional Flow SwitchHigh and Low Gas Pressure Switches Optional Wiring DIAGRAM-MODELS HD101-HD401 HD101-HD401 Troubleshooting PRE-START-UP Initial START-UPPage Main Burner Adjustment Start-UpSafety Inspection Gas Type Conversion on ValveAir Filter Inspection/Removal Post START-UP CheckFollow-Up Heat Exchanger Removal Remove the Screws and PanelSuggested Minimum MaintenanceMaintenance Schedule Yearly Beginning of each heatingDaily AppendixInside Combustion Air Contamination MonthlyPage Important Instructions for the Commonwealth of Massachusetts Page
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HD101, HD401 specifications

Raypak is renowned for its commitment to high-quality heating solutions, with the HD101 and HD401 models standing out in their product range. These units are designed specifically for commercial applications, providing reliable and efficient hydronic heating systems. The HD series embodies innovation while addressing the unique demands of larger spaces.

One of the main features of the HD101 and HD401 is their stainless steel construction, which ensures increased durability and resistance to corrosion. This design choice enhances the longevity of the units, making them ideal for various installations in commercial or industrial settings.

Both models are equipped with a high-efficiency heat exchanger that maximizes heat transfer while minimizing energy consumption. This feature is particularly significant in today’s environmentally conscious market, as it contributes to lower operating costs and reduced carbon footprints. The heat exchangers are engineered for easy maintenance, offering simplicity when service is required.

In terms of technology, the HD101 and HD401 include advanced digital controls that allow for precise temperature regulation. This user-friendly interface enables operators to easily manage and monitor heating parameters, facilitating optimal performance and energy management.

The models also feature modulating burners that adjust their output according to the heating demand. This capacity for modulation results in smoother operation and an overall increase in efficiency, as the burners can maintain consistent temperatures without excessive energy use.

Another noteworthy characteristic is their compatibility with various control systems, including BMS (Building Management Systems). This adaptability allows for seamless integration into existing infrastructure, providing users with greater versatility and control over their heating environments.

Both the HD101 and HD401 come with advanced safety features, including flame rollback protection and pressure monitoring, ensuring safe operation even in demanding conditions. Additionally, their compact design allows for easy installation in limited spaces while still providing powerful heating capabilities.

Ultimately, the Raypak HD101 and HD401 are exceptional choices for those in need of high-efficiency commercial heating solutions. With their robust construction, advanced technology, and user-friendly features, these models promise to deliver reliable performance and energy savings for years to come. Whether for a large facility or a specific industrial application, they stand ready to meet the heating challenges of today’s commercial landscape.