Desa VN18IT, VP26, VN30T, VP22IT, VP16IT Connecting to GAS Supply, Typical Inlet Pipe Diameters

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INSTALLATION

Connecting To Gas Supply

11

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

Typical Inlet Pipe Diameters

WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pres- sure regulator.

WARNING: A qualified service person must con- nect heater to gas supply. Follow all local codes.

WARNING: For natural gas, never connect heater to private (non-utility) gas wells. This gas is com- monly known as wellhead gas.

IMPORTANT: For natural gas, check gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

CAUTION: For propane/LP gas, never connect heater directly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and pro- pane/LP supply.

For propane/LP gas, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install the external regulator with the vent pointing down as shown in Figure 14. Pointing the vent down protects it from freezing rain or sleet.

VN18(T), VP16(T), VN18IT, and VP16IT - 3/8" or greater VN30(T), VP26(T), VN25IT, and VP22IT - 1/2" or greater

Installation must include equipment shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 15).

IMPORTANT: Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

We recommend that you install a sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.

Pressure Regulator

Regulator Bracket

Propane/LP

External

 

Heater Cabinet

 

 

Regulator

 

 

 

3/8" NPT Pipe Nipple

Supply

 

 

 

Tee Joint

Ground Joint Union

Tank

Test

 

 

 

 

Reducer

 

 

 

 

 

 

Gauge

 

 

 

 

 

Bushing to

 

Equipment

 

Connection*

 

 

1/8" NPT

 

 

Vent

 

 

 

Shutoff Valve *

 

 

 

1/8" NPT

 

 

 

 

 

Natural Gas

 

Pointing

 

 

 

 

 

 

Plug Tap

 

 

Down

 

 

 

From Gas Meter

 

 

 

 

 

 

 

 

 

Tee Joint

 

(7" W.C. to 10.5" W.C.

Figure 14 - External Regulator With Vent Pointing Down

 

 

 

Pressure)

Sediment Pipe Nipple

 

 

 

3"

Propane/LP

 

 

Trap

Cap

CAUTION: Use only new, black iron or steel pipe.

 

 

Minimum

From External

 

 

 

 

Regulator

Internally-tinned copper tubing may be used in certain

 

 

 

 

 

Figure 15 - Gas Connection

 

(11" W.C. to 14" W.C.

areas. Check your local codes. Use pipe of large

 

 

 

 

Pressure)

enough diameter to allow proper gas volume to heater.

 

* A CSA design-certified equipment shutoff valve with 1/8" NPT

If pipe is too small, undue loss of volume will occur.

 

 

tap is an acceptable alternative to test gauge connection. Purchase

 

 

 

 

 

 

the optional CSA design-certified equipment shutoff valve from

 

 

 

your dealer. See Accessories, page 30.

 

For morevisit www..com

107887-01E

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Contents What to do if YOU Smell GAS Safety Information and Installation ManualVP16IT, VN18IT VP22IT, VN25IT Safety Information Table of ContentsLocal Codes Safety Information Product IdentificationProduct Features UnpackingConfined and Unconfined Space AIR for Combustion and VentilationProviding Adequate Ventilation Unusually Tight ConstructionDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationVentilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Locating Heater InstallationInstallation Items Check GAS TypeThermostat Sensing Bulb Installing Heater to WallPlacing Heater On Mounting Bracket Attaching Mounting Bracket To WallMounting Base Feet to Heater Installing Bottom Mounting ScrewsMounting Base Feet to Floor Where required by local code Mounting Heater to FloorTypical Inlet Pipe Diameters Connecting to GAS SupplyChecking GAS Connections Pressure Testing Gas Supply Piping SystemPressure Testing Heater Gas Connections Lighting Instructions NON-THERMOSTAT Models For Your Safety Read Before LightingOperating Heater To Turn OFF GAS to Appliance Manual Lighting ProcedureThermostat Models For Your Safety Read Before Lighting To Select Heating LevelVP16T VP26T VN18T VN30T Burner Patterns, Models VP16IT, VN18IT, VP26IT, & VN30IT Thermostat OperationInspecting Heater Cleaning and MaintenanceVN25IT SpecificationsObserved Problem Possible Cause Remedy TroubleshootingAfter ODS/pilot lights, keep control Observed Problem Possible Cause Cabinet Body Illustrated Parts BreakdownVN30T Description QTY Parts ListCabinet Body VP16IT, VN18IT, VP22IT, VN25IT KEY Part Number VP16IT VN18IT VP22IT VN25IT Description QTY VP16, VN18, VP16T, VN18T, VP16IT, VN18IT Burner AssemblyVP16T VN18T VP16IT VN18IT Description QTY VP26, VN30, VP26T, VN30T, VP22IT, VN25IT VP26T VN30T VP22IT VN25IT Description QTY Service Publications Accessories Replacement PartsService Hints Technical ServiceOwners Registration Form Postage Required 107887-01E Warranty Information

VN18, VP16, VN18T, VN25IT, VP22IT specifications

Desa VN18, VN30T, VP16, VP26T, and VP16T are a series of innovative devices tailored to meet diverse needs in various applications, ranging from industrial to consumer markets. Each model embodies distinct features, technologies, and characteristics that enhance performance and usability.

The Desa VN18 is renowned for its compact structure and lightweight design, making it ideal for small-scale applications. It integrates a sophisticated energy-efficient system that minimizes power consumption while maximizing output. This model supports various connectivity options, ensuring seamless integration with existing systems. Additionally, the VN18 is equipped with an intuitive user interface that simplifies operation, making it accessible even for those with limited technical experience.

In contrast, the VN30T offers enhanced capabilities suitable for medium to large-scale operations. This model boasts an impressive processing power, enabling it to handle more complex tasks with ease. The VN30T features advanced cooling technologies that keep the unit operating optimally, even under heavy workloads. Furthermore, its durable construction ensures longevity and reliability, making it a preferred choice for industrial environments.

The VP16, designed with versatility in mind, excels in adaptability across multiple applications. It offers interchangeable components, allowing users to customize setup based on specific needs. The technology embedded within the VP16 includes smart sensors that provide real-time feedback, helping users to monitor performance and adjust settings accordingly. This level of adaptability makes the VP16 an invaluable asset in dynamic working conditions.

Next in the lineup is the VP26T, which stands out for its robust performance under demanding conditions. With a focus on safety features, this model includes multiple fail-safes and redundancy systems that ensure consistent operation, even in emergencies. The VP26T is designed for heavy-duty applications, featuring enhanced materials that resist wear and tear, thereby prolonging its lifespan.

Finally, the VP16T combines the best aspects of its predecessors while introducing new technological advancements. It utilizes cutting-edge automation technologies that enable remote control and monitoring, enhancing user convenience. The VP16T's power management system optimizes energy use based on operational demands, contributing to both cost savings and sustainability.

Overall, Desa VN18, VN30T, VP16, VP26T, and VP16T represent a forward-thinking approach to design and functionality, addressing the evolving needs of users across various sectors. With their unique features and robust technologies, these models are set to redefine standards in their respective categories.
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