Desa MPF18VNA, MPF18VPA Checking GAS Connections, Test Pressures In Excess Of 1/2 Psig 3.5 kPa

Page 8

INSTALLATION

Continued

CAUTION:Useonlynew,black ironorsteelpipe.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 vol- ume to heater. If pipe is too small, undue loss of volume will occur.

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 log set (see Figure 7).

IMPORTANT: Install 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 7. Lo- cate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and appliance. Locate sediment trap where trapped matter is not likely to freeze.

CSA Design-Certified Equipment

Shutoff Valve with 1/8" NPT Tap*

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.

CHECKING GAS CONNECTIONS

WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detection fluid toalljoints.Bubblesformingshow a leak. Correct all leaks at once.

CAUTION: Make sure exter- nal regulator has been installed between propane/LP supply and appliance. See guidelines under Connecting to Gas Sup- ply, page 7.

PRESSURE TESTING GAS SUPPLY PIPING SYSTEM

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

Approved Flexible

 

Gas Hose (If allowed

 

by local codes)

 

3" Min.

 

Pipe Cap

Tee

Nipple

Joint

Sediment Trap

Natural From Gas Meter (5" W.C.** to 10.5" W.C. Pressure)

Propane/LP From External Regulator (11" W.C.** to 14" W.C. Pressure)

1.

Disconnect appliance with its appliance main

 

gas valve (control valve) and equipment shutoff

 

valve from gas supply piping system. Pressures

 

in excess of 1/2 psig will damage control valve

 

regulator.

2.

Cap off open end of gas pipe where equipment

 

shutoff valve was connected.

3.

Pressurize supply piping system by either

 

opening propane/LP supply tank valve for

 

propane/LP gas or opening main gas valve

 

located on or near gas meter for natural gas

Figure 7 - Gas Connection

*Purchase the optional CSAdesign-certified shutoff valve from your dealer. See Accessories, page 17.

** Minimum inlet pressure for purpose of input adjustment.

 

or using compressed air.

4.

Check all joints of gas supply piping system.

 

Apply noncorrosive leak detection fluid to all

 

joints. Bubbles forming show a leak.

8

www.desatech.com

114925-01C

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Contents What to do if YOU Smell GAS MPF24VNA, MPF24VPA MPF18VNA and MPF18VPATable of Contents Safety Information Provide adequate clearances around air openings Local CodesHigh traffic areas Windy or drafty areas Product Features InstallationRemove log set assembly from carton Product IdentificationInstallation and Clearances Flue Opening SpecificationsVenting Specifications for InstallationInstallation Items Needed Installing ApplianceConnecting to GAS Supply Natural From Gas Meter 5 W.C.** to 10.5 W.C. Pressure Checking GAS ConnectionsTest Pressures In Excess Of 1/2 Psig 3.5 kPa Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Placement of Loose EmbersPressure Testing Appliance Gas Connections Operating Appliance Inspecting Burners Pilot Flame PatternON/OFF Series Model HRC100 Check pilot flame pattern and burner flame pat- terns oftenService Hints Cleaning MaintenanceTechnical Service Replacement PartsTroubleshooting Observed Problem Possible Cause RemedyContact local natural or Pilot is lit Burner orifices clogged Propane/LP gas companyReplace burner orifices Replace burner orificeBurners are lit Position when burners are Cleaners or similar productsGas regulator defective Control valve defective Check manifold pressureGas leak. See Warning statement at top Gas leak. See WarningStatement at top Wiring Diagram SpecificationsAccessories Illustrated Parts Breakdown MPF24VNA, MPF24VPA MPF18VNA, MPF18VPAParts List Limited Warranty Vented GAS LOG Appliances Warranty InformationKeep this Warranty

MPF18VNA, MPF24VPA, MPF18VPA specifications

The Desa MPF24VPA, MPF18VPA, and MPF18VNA are innovative models designed for efficient heating solutions tailored to a variety of residential and commercial applications. These products showcase advanced technology and engineering that cater to diverse consumer needs, making them notable players in the heating equipment market.

One of the defining features of the Desa MPF series is their high heating capacity. The MPF24VPA, for instance, can deliver a robust output suitable for larger spaces, while the MPF18VPA and MPF18VNA offer slightly lower capacities, making them ideal for smaller areas. This range allows consumers to choose models according to the specific requirements of their environments.

Energy efficiency is another hallmark of the Desa MPF series. These models incorporate state-of-the-art combustion technology, ensuring maximum fuel utilization and reduced emissions. With features such as automatic ignition and efficient heat exchangers, users can expect quick heat responses and consistent comfort without wasting energy, contributing to lower utility bills.

Durability and user-friendly operation are also significant characteristics of the MPF24VPA, MPF18VPA, and MPF18VNA. Constructed with high-quality materials and components, these heaters are built to withstand the rigors of regular use. Moreover, the intuitive controls make operation straightforward, allowing users to easily adjust settings to suit their needs.

Safety is always a top priority in any heating appliance, and Desa takes this aspect seriously. The MPF series includes several safety features, such as automatic shut-off in case of overheating, low oxygen sensors, and robust construction that prevents overheating and accidental damage. These precautions ensure that consumers can enjoy their heating solutions confidently.

Additionally, the MPF series features versatile installation options. The models can be configured for vented or vent-free operation, providing flexibility based on local regulations or personal preferences. Their sleek designs are also aesthetically pleasing, allowing them to blend seamlessly into various home or office environments.

In conclusion, the Desa MPF24VPA, MPF18VPA, and MPF18VNA are exemplary heating units that combine efficiency, effectiveness, and safety. With diverse features and options designed to cater to a wide audience, these models stand out as reliable choices for anyone looking for high-quality heating solutions. Whether for a cozy home or a bustling commercial space, the Desa MPF series is engineered to deliver warmth and comfort through innovative design and technology.
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