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MHSC NBST27, Installation Instructions Manual, Page: 26 / 32

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26

81D3032

NBST27 Unvented Gas Log Set

REPLACEMENT PARTS

1a

1b

1c

1d

1e

1f

1g

1h

1i

1j

2

3

4

5

6

7

8

813032
NBST parts

 

Ref. 

Description 

Qty. 

NBST27NV 

NBST27PV

  1. 

Complete Log Set 

1 

81D3033 

81D3033

  1a. 

Log #1 

1 

81D3034 

81D3034

  1b. 

Log #2 

1 

81D3035 

81D3035

  1c. 

Log #3 

1 

81D3036 

81D3036

  1d. 

Log #4 

1 

81D3037 

81D3037

  1e. 

Log #5 

1 

81D3038 

81D3038 

  1f. 

Log #6 

1 

81D3039 

81D3039

  1g. 

Log #7 

1 

81D3040 

81D3040

  1h. 

Log #8 

1 

81D3041 

81D3041

  1i. 

Log #9 

1 

81D3042 

81D3042

  1j. 

Log #10 

1 

81D3043 

81D3043

  2. 

Burner 

1 

81D3017 

81D3027

  3. 

Control Valve 

1 

14D0467 

14D0468

  4. 

ODS Pilot Assembly 

1 

14D0097 

14D0098

  5. 

Pilot Regulator 

1 

14D0469 

--

  6. 

Piezo Ignitor 

1 

14D0503 

14D0503

  7. 

Piezo Wire 

1 

00K0632 

00K0632

  8. 

On/Off Switch 

1 

32D0232 

32D0232

W

ARNING

Failure to position the parts in accordance with these 
diagrams  or  failure  to  use  only  parts  specifically 
approved  with  this  appliance  may  result  in  property 
damage or personal injury.

Summary of Contents for NBST27

Page 1: ...ollow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas suppl...

Page 2: ...Floor Clearance 10 Fireplace Preparation 11 Installing Vented Applications 11 Gas Line Connection 13 Millivolt 13 Electrical Wiring Millivolt 14 Optional Wall Switch or Thermostat 14 Remote Receiver...

Page 3: ...e installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code ANSI Z223 l NFPA54 10 This unit complies with ANSI Z21 11 2 2007 Unvented Heaters and also...

Page 4: ...system by closing its equipment shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 psig 3 5 kPa 23 Do not use this room heater if an...

Page 5: ...fur compounds Drill with 5 32 masonry bit Pipe wrench or appropriate size crescent wrench set Manual shutoff valve WARNING Gloves are recommended when handling ceramic fiber logs to prevent skin irrit...

Page 6: ...r retarder with a rating of 1 perm 6 x 1011 kg per pa sec m2 or less with openings gasketed or sealed b weather striping has been added on openable windows and doors and c caulking or sealants are app...

Page 7: ...lines for placing a gas log set in a fireplace that has a restrictive barrier along the bottom front opening of the fireplace Some examples of barri ers are glass screen door frames and sunken recesse...

Page 8: ...g damper minimum clearances shown in Figure 8 through 10 must be met 3 If installing unit into a vented firebox with a damper that is always open no minimum clearances are required Heat resistant mate...

Page 9: ...les shown in Figure 8 OR extend heat resistant material to at least 12 and observe profiles shown in Figure 7 Less than 8 Extend heat resistant material to at least 8 install hood and observe profiles...

Page 10: ...ble Material FP2368 Heater in Fire place or Firebox Figure 9 Minimum Clearance above Combustible Flooring 14 Min FP2369 comb floor Heater in Fireplace or Firebox Combustible Material This Distance may...

Page 11: ...oting Use a heat resistant sealant Do not seal chimney flue damper Install and operate the appliance as directed in this manual WARNING Before installing in a solid fuel burning fireplace The chimney...

Page 12: ...materials as described in Placement in a Fireplace with Restrictive Barrier section PLACE and SECURE APPLIANCE 1 Center the gas log unit in the fireplace or firebox Make certain the front feet of the...

Page 13: ...e same as stated on the heater s rat ing plate If the gas supply is different DO NOT INSTALL THE HEATER Contact your dealer for the correct model WARNING Connecting directly to an unregulated propane...

Page 14: ...tional Wall Switch Remote or T Stat Log Switch Millivolt Valve ODS Pilot ODS Pilot FP2267 Figure 15 Wiring Diagram NOTE Log switch wires are not fac tory connected Connect log switch wires to the TH T...

Page 15: ...er Leads Thermostat Reading Test To Test To Terminals Contacts Should Be A Complete 2 3 Closed Minimum 175 System B Thermopile 1 2 Open Minimum 500 Output A Complete Millivolt System Check A Reading T...

Page 16: ...Place volcanic rock only on the floor of the fireplace During initial operation of the new heater new burning logs and or rock wool will give off a paper burning smell and orange flames will be presen...

Page 17: ...s on bot tom of log with two 2 pins on burner The tallest part of the log is on the valve side of burner Gently push log down until it comes in contact with burner surface Figure 19 Figure 19 Place Lo...

Page 18: ...e fireplace LG655 NBST log 6 Log 6 Log 1 Control Valve LG655 Figure 24 Place Log 6 6 Place log 6 on pilot end of burner by aligning the V notch in bottom of log with the filler brack et surrounding th...

Page 19: ...le of log 1 Figure 26 LG658 NBST log 9 Log 9 LG658 Figure 27 Place Log 9 9 Place log 9 on farthest right grate tine by aligning V notch in bottom of log with grate tine Place rectangular notch in bott...

Page 20: ...thermocouple then the main burner cannot function reliably Figure 30 for incorrect shape of pilot flame FP2272 pilot correct flame Thermocouple for Natural Gas Thermocouple for LP FP2272 Figure 29 Co...

Page 21: ...YOUR SAFETY READ BEFORE LIGHTING A This appliance is equipped with a piezo ignition device which lights the pilot If piezo is not working properly see Match Lighting Instructions Page 23 B BEFORE OPER...

Page 22: ...n the control knob for 30 seconds or longer to allow air to bleed out of the gas piping 7 With the control knob pushed in push in and release the piezo ignitor button to light the pilot 8 Continue pus...

Page 23: ...tated wash gently with soap and water Refer to manual for correct log placement Periodic Cleaning Refer to parts diagram for location of items discussed below Do not use cleaning fluid to clean logs o...

Page 24: ...valve closed 2 Control knob not in PILOT position 3 Control knob not pressed in while in PILOT position 4 Air in gas lines when installed 5 ODS pilot is clogged 6 Gas regulator setting is not correct...

Page 25: ...t fully open 4 Thermocouple connection loose at control valve 5 Pilot flame not touching thermocou ple which allows thermocouple to cool causing pilot flame to go out This problem could be caused by e...

Page 26: ...D3039 81D3039 1g Log 7 1 81D3040 81D3040 1h Log 8 1 81D3041 81D3041 1i Log 9 1 81D3042 81D3042 1j Log 10 1 81D3043 81D3043 2 Burner 1 81D3017 81D3027 3 Control Valve 1 14D0467 14D0468 4 ODS Pilot Asse...

Page 27: ...lexcon 30 Wall Switch and Wire MVWS Wall Thermostat Kit WT On Off Remote RCB RCMT TLM WMTD Thermostat Remote RCST RCT TLT WWTD Remote Receiver Cover Ember RRCE Remote Receiver Cover Metal RRCM Log Swi...

Page 28: ...28 81D3032 NBST27 Unvented Gas Log Set...

Page 29: ...29 81D3032 NBST27 Unvented Gas Log Set...

Page 30: ...uirements provided however that during said thirty 30 day period a battery operated carbon monoxide detector with an alarm shall be installed Massachusetts Residents Only Please read and follow these...

Page 31: ...fetime Warranty will also be void if the appliance is not operated and maintained according to the operating instructions supplied with the appliance and does not extend to 1 firebox burner assembly d...

Page 32: ...MHSC 149 Cleveland Drive Paris Kentucky 40361 www mhsc com...

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