Desa VFRMV24NA, VFRMV18NA, VFRMV18PA installation manual Installation, Connecting to GAS Supply

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INSTALLATION

Continued

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

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

CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply. This heater requires an external regulator (not sup- plied). Install the external regulator between the heater and propane/LP supply.

WARNING: Never connect natural gas fireplace to private (non- utility) gas wells. This gas is commonly known as wellhead gas.

Installation Items Needed

Before installing heater, make sure you have the items listed below.

•external regulator (supplied by installer)

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•equipment shutoff valve *

•test gauge connection *

•sediment trap

•tee joint

•pipe wrench

•approved flexible gas line with gas connector (if allowed by local codes) (provided)

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 27.

For propane/LP units, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce in- coming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install external regulator with the vent pointing down as shown in Figure 12. Point- ing the vent down protects it from freezing rain or sleet.

CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur.

INSTALLATION

11

Installing Heater Assembly (Cont.)

Connecting to Gas Supply

 

 

 

CONNECTING TO GAS SUPPLY

Installation must include an 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 13 page 12, depending on your model).

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

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 pe- troleum (LP) gas.

We recommend that you install a sediment trap in supply line as shown in Figure 13 page 12, depending on your model. 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.

CAUTION: Avoid damage to gas control. Hold gas control with wrench when connecting it to gas piping and/or fittings.

External Regulator

Propane/LP

Supply Tank

Vent Pointing Down

Figure 12 - External Regulator With Vent Pointing Down

114745-01

For more information, visit www.desatech.com

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Contents What to do if YOU Smell GAS Unvented Vent Free GAS LOG HeaterTable of Contents Local Codes Safety Information Product IdentificationLocal Codes Optional Remote Control AccessoriesProduct Features Safety DeviceDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Appliance LocationVentilation Air From Inside Building Ventilation AIRCheck GAS Type InstallationMinimum Noncombustible material Clearences InstallationFloor Clearances InstallationMantel Clearances Attaching Damper Clamp Installing Heater AssemblyConnecting to GAS Supply InstallationNatural Checking GAS ConnectionsPROPANE/LP Checking Gas Joints propane/LP only What to do if YOU Smell GAS Lighting InstructionsTo Turn OFF GAS to Appliance Manual Lighting ProcedureRemote Control Operation Operating HeaterThermostat Control Operation Operating HeaterBurner Flame Pattern Pilot Flame PatternInjector Holder On Outlet Burner Tube Cleaning Burner Injector Holder and Pilot AIR Inlet HoleObserved Problem Possible Cause Remedy TroubleshootingTroubleshooting Troubleshooting VFRMV18NA VFRMV24NA SpecificationsService Hints Technical Service Replacement Parts Service HintsVFRMV18NA, VFRMV18PA VFRMV24NA, VFRMV24PA Illustrated Parts BreakdownPart Number for Parts ListWALL-MOUNT ON/OFF Switch GWMS2 AccessoriesReceiver and HAND-HELD Remote Control KIT Ghrcb WALL-MOUNT Thermostat Switch GWMT1This page Intentionally Left OWNER’S Registration Form Postage Required 114745-01 Limited Warranty VENT-FREE GAS LOG Heaters Warranty Information

VFRMV24NA, VFRMV18NA, VFRMV18PA specifications

The Desa VFRMV18NA, VFRMV18PA, and VFRMV24NA are advanced heating solutions designed to efficiently warm residential spaces while providing enhanced user comfort and convenience. These models are part of the VFRMV series, known for their reliability, innovative technology, and energy efficiency.

One of the main features of the VFRMV series is its variable refrigerant flow (VRF) technology. This allows the system to modulate the amount of refrigerant sent to each indoor unit based on the current heating or cooling load, resulting in optimal energy consumption. This flexibility not only saves energy but also ensures that the desired temperature can be quickly achieved and maintained across different rooms.

The VFRMV18NA and VFRMV18PA models are designed for residential use, with the VFRMV18PA specifically including additional features for enhanced performance in various climatic conditions. They come equipped with inverter-driven compressors, which adjust their speed to meet demand, leading to quieter operation and improved efficiency. This inverter technology ensures that energy consumption decreases during periods of lower demand, making these models environmentally friendly and cost-effective.

The VFRMV24NA model, with its higher capacity, is suitable for larger spaces or homes needing additional heating and cooling power. Like its counterparts, it features a high SEER (Seasonal Energy Efficiency Ratio) and HSPF (Heating Seasonal Performance Factor) ratings, indicating its efficiency in energy use, which translates into savings on energy bills for homeowners.

In terms of characteristics, all three models incorporate user-friendly controls, allowing homeowners to easily adjust settings and schedule operations. Smart technology integration enables remote monitoring and control via mobile apps, giving users the ability to manage their indoor climate on the go.

Additionally, the VFRMV series features advanced filtration systems that improve indoor air quality by capturing dust and allergens, making these models an excellent choice for households with allergy sufferers. The units are also designed with sleek, modern aesthetics, ensuring they blend seamlessly with a variety of interior designs.

In summary, the Desa VFRMV18NA, VFRMV18PA, and VFRMV24NA offer cutting-edge technology, impressive efficiency, and user-friendly features. With their VRF technology, inverter-driven compressors, and smart controls, these heating solutions provide an ideal choice for homeowners seeking comfort, efficiency, and convenience in their indoor environments.
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