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114370-02C

9

INSTALLATION

Continued 

CHECKING GAS CONNECTIONS

 WARNING: Test all gas piping 

and  connections,  internal  and 

external to unit, 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 detec-

tion fluid to all joints. Bubbles 

forming show a leak. Correct all 

leaks at once.

  CAUTION:  Make  sure  ex-

ternal  regulator  has  been  in-

stalled  between  propane/LP 

supply  and  appliance.  See 

guidelines under 

Connecting to 

Gas Supply

, page 7.

PRESSURE TESTING GAS SUPPLY 
PIPING SYSTEM 
Test Pressures In Excess Of 1/2 PSIG 
(3.5 kPa)

1.  Disconnect  appliance  with  its  individual 

equipment  shutoff  valve  from  gas  supply 

piping system. Pressure in excess of 1/2 psig 

will damage appliance 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, 

or using compressed air.

4.  Check all joints of gas supply piping system. 

Apply noncorrosive leak detection fluid to gas 

joints. Bubbles forming show a leak. 

5.  Correct all leaks at once.

6.  Reconnect  log  set  and  equipment  shutoff 

valve to gas supply. Check reconnected fit

-

tings for leaks. 

Test Pressures Equal To or Less Than 
1/2 PSIG (3.5 kPa)

1.  Close equipment shutoff valve (see Figure 8).

2.  Pressurize supply piping system by either us

-

ing compressed air or opening main gas valve 

located on or near gas meter.

3.  Check all joints from gas meter to equipment 

shutoff valve for natural gas or propane/LP 

supply to equipment shutoff valve for propane/

LP (see Figure 9 or 10). Apply noncorrosive 

leak detection fluid to all joints. Bubbles form

-

ing show a leak. 

4.  Correct all leaks at once.

Figure 8 - Equipment Shutoff Valve

Equipment 
Shutoff 
Valve

Open

Closed

Figure 9 - Checking Gas Joints  

(Propane/LP Gas Only) 

Figure 10 - Checking Gas Joints  

(Natural Gas Only) 

Gas Meter

Propane/LP 
Tank

Equipment 
Shutoff Valve

Equipment 
Shutoff Valve

Control Valve 
Location

Control Valve 
Location

Summary of Contents for Design Dynamics VTD-18NV-JHB

Page 1: ...l switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department...

Page 2: ...his appliance may be in stalled in an aftermarket permanently located manufactured mobile home where not prohib ited by local codes This appliance is only for use with the type of gas indicated on the...

Page 3: ...be present even though no odor exists Make certain you read and understand all warnings Keep this manual for reference It is your guide to safe and proper operation of this log set WARNING Any change...

Page 4: ...lified service person Note During initial operation slight smoking could occur due to log curing and the burning of manufacturing residues You may wish to add more ventilation by opening a window 7 To...

Page 5: ...o HI LO for use with hand held ON OFF remote included OF RC Converts ON OFF valve for use with hand held ON OFF remote See Accessories page 17 Installation WARNING Before installing in a solid fuel bu...

Page 6: ...p or permanent stop must be installed or the damper blade must be cut or removed Model Burner Btu Input MinIMUM Vent Opening VTD 18NV JHB VTD 18PV JHB 18 Ramp 59 000 8 dia VTD 24NV JHB VTD 24PV JHB 24...

Page 7: ...ply CONNECTING TO GAS SUPPLY WARNING This appliance requires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator WARNING A qualified ser vicepersonmustconnectheater to gas supply...

Page 8: ...t lightly to male NPT threads This will prevent excess sealant from going into pipe Excess sealant in pipe could result in clogged heater valves Figure 7 Gas Connection PurchasetheoptionalCSAdesign ce...

Page 9: ...e LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air 4 Check all joints of gas supply piping system Apply noncorrosive leak detection fluid to gas jo...

Page 10: ...not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department C Us...

Page 11: ...switch selector switch to the ON position to light burners Note AUTO is not functional Figure 11 Control Knob and Ignitor Button 11 Set flame adjustment knob to any level between HI and LO Optional co...

Page 12: ...W C Inlet Gas Pressure in of water Max 10 5 W C Min 5 0 W C VTD 18PV JHB Rating Variable 59 000 Btu Hr Type Gas Propane LP Ignition Piezo Manifold Pressure 10 W C Inlet Gas Pressure in of water Max 14...

Page 13: ...T position 4 Air in gas lines when in stalled 5 Depleted gas supply pro pane LP only 6 Pilot is clogged 7 Gas regulator setting is not correct When ignitor button is pressed there is no spark at pilot...

Page 14: ...es out when control knob is released Oneorbothburnerdoesnotlight after ODS pilot is lit Delayed ignition of burner Burner backfiring during com bustion 1 Press in control knob fully 2 After pilot ligh...

Page 15: ...rs are lit White powder residue forming within burner box or on adjacent walls or furniture Remote does not function Appliance produces a clicking ticking noise just after burners are lit or shut off...

Page 16: ...rs chemicals new car pet etc See IMPORTANT statement above 2 Low fuel supply propane LP only 3 Gas leak See Warning statement at top of page 1 Not enough fresh air is avail able 2 Low line pressure 3...

Page 17: ...l numbers of your log set how log set was malfunctioning type of gas used propane LP or natural gas purchase date Usually we will ask you to return the part to the factory Parts Not Under Warranty Con...

Page 18: ...desatech com 114370 02C 18 Illustrated Parts Breakdown Models VTD 18NV JHB VTD 24NV JHB VTD 30Nv JHB 2 10 11 26 27 28 20 13 7 9 13 19 1 8 12 3 5 6 4 12 5 24 29 22 18 13 23 14 17 15 16 13 29 21 25 12...

Page 19: ...re Harness 1 17 103784 01 ON OFF Extension Knob 1 18 14512 Valve MV NG 1 14513 Valve MV LP 1 19 112804 05 Valve Bracket 1 20 114395 01 Pilot Bracket 1 114395 02 Pilot Bracket 1 21 116910 01 Brass 3 8...

Page 20: ...war ranty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in origin...

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