Page 2 - State of Massachusetts:
2 IMPORTANTSAFETY INFORMATION K e e p t h e a p p l i a n c e a r e a c l e a ra n d f r e e f r o m c o m b u s t i b l em a t e r i a l s , g a s o l i n e , a n d o t h e rf l a m m a b l e v a p o r s a n d l i q u i d s . 1. This appliance is only for use with the type of gas indicated on the r...
Page 3 - PRODUCT FEATURES; SAFETY DEVICE; National Fire Protection Association, Inc.; UNPACKING; If high humidity is experienced, a dehumidifier
3 PRODUCT FEATURES SAFETY DEVICE A s t a n d a r d r e q u i r e m e n t f o r a l l v e n t - f r e e r o o mheaters. This heater has a pilot with an OxygenDepletion Sensor(ODS) safety shutoff system.The ODS/pilot shuts off the heater if there isnot enough fresh air. PIEZO IGNITION SYSTEM This heat...
Page 4 - Unusually Tight Construction; DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
4 FRESH AIR FORCOMBUSTION ANDVENTILATION PROVIDING ADEQUATEVENTILATION The following are excerpts fromNational Fuel Gas Code. NFPA 54/ANS Z223.1, Section 5.3. Air forCombustion and Ventilation. Allspaces in homes fall into one ofthe three following ventilationclassifications:1. Unusually Tight Const...
Page 6 - VENTILATION AIR; INSTALLATION NEEDS; LOCATING HEATER; Figure 3 -Ventilation Air from Outdoors
6 VENTILATION AIR Ventilation Air From OutdoorsP r o v i d e e x t r a f r e s h a i r b y u s i n gv e n t i l a t i o n g r i l l s o r d u c t s : Yo u m u s tprovide two permanent openings: onewithin 12 " of the ceiling and one within 12 " of the floor. Connect these items directly to th...
Page 7 - INSTALLATION
7 INSTALLATION Figure 8 - Mounting BracketClearances Figure 7 - Removing Lower FrontPanel Of Heater Figure 4 -Mounting Clearances AsView From Front Of Heater WARNING: Maintain them i n i m u m c l e a r a n c e s s h o w ni n F i g u r e 4 . I f y o u c a n ,provide greater clearances fromfloor, cei...
Page 8 - Figure 9 - Folding Anchor; P l a c i n g H e a t e r O n M o u n t i n g; Note: Do not replace lower front
8 INSTALLATION Figure 11 - Mounting Heater OntoMounting Bracket Figure 9 - Folding Anchor Figure 10 - Popping Open AnchorWing For Thin Walls Attaching Mounting Bracket toWallNote: Wall anchors, mountingscrews, and spacers are inhardware package. The hardwarepackage is provided with heater.Attaching ...
Page 9 - CONNECTING TO GAS SUPPLY; NPT tap is
9 INSTALLATION CONNECTING TO GAS SUPPLY WA R N I N G : A q u a l i f i e ds e r v i c e p e r s o n m u s t c o n n e c theater to gas supply. Follow alllocal codes. WARNING: This appliancerequires a 3/8 " NPT (National Pipe Thread) inlet connectionto the pressure regulator. CAUTION: Never conne...
Page 10 - Figure 15 -Equipment Shutoff Valve; THERMOSTAT MODELS; Figure 16 -Checking Gas Joints; OPERATING YOUR HEATER
1 0 Figure 15 -Equipment Shutoff Valve INSTALLATION CHECKING GASCONNECTIONS WARNING: Test all gaspiping and connections for leaks afterinstalling or servicing. Correct allleaks at once. WARNING: Never use an openflame to check for a leak. Apply amixture of liquid soap and watert o a l l j o i n t s ...
Page 11 - OPERATING YOUR HEATER; to
1 1 Figure 17 - Control Knob In TheOFF Position Figure 18 - Pilot OPERATING YOUR HEATER THERMOSTAT MODELS LIGHTING INSTRUCTIONS 1 . S T O P ! R e a d t h e s a f e t y i n f o r m a t i o n o n t h e s i d e o f heater.2 . C h e c k t h a t g a s s u p p l y t o heater is on.3 . P u s h i n g a s c ...
Page 12 - OPERATING YOUR HEATER; WHAT TO DO IF YOU SMELL GAS; Lighting Instructions.
1 2 OPERATING YOUR HEATER NON-THERMOSTAT MODELS FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire ore x p l o s i o n m a y r e s u l t c a u s i n gproperty damage, personal injury orloss of life. A. When lighting the pilot, follow theseinstructio...
Page 13 - BURNER FLAME PATTERN; Figure 25 - Pilot Inlet Air Hole; PILOT FLAME PATTERN; CLEANING AND
1 3 Figure 21 - Correct Pilot FlamePattern Figure 22 - Incorrect Pilot FlamePattern BURNER FLAME PATTERN Figure 23 shows a correct burnerflame pattern. Figure 24 shows anincorrect burner flame pattern. Ifpilot flame pattern is incorrect, asshown in Figure 24. turn heater off (see To Turn Off Gas To ...
Page 14 - TROUBLESHOOTING; WARNING: Only a qualified; knob. Repeat igniting operation
1 4 TROUBLESHOOTING Note : All troubleshootingi t e m s a r e l i s t e d i n o r d e r o foperation. WARNING: Only a qualified service person should service andrepair heater. CAUTION: Never use a wire, needle, or similar object to cleanO D S / p i l o t . T h i s c a n d a m a g eODS/pilot unit. OB...
Page 15 - Continued; OBSERVED PROBLEM; Burner backfiring during combustion.; POSSIBLE CAUSE
1 5 TROUBLESHOOTING Continued OBSERVED PROBLEM B u r n e r ( s ) d o e s n o t l i g h t a f t e rODS/pilot is lit. Delayed ignition of burner(s). Burner backfiring during combustion. Ye l l o w f l a m e d u r i n g b u r n e rcombustion. Slight smoke or odor duringinitial operation. Heater produce...
Page 16 - WARNING: If you smell gas; REMEDY; Not enough fresh air is available.; Heater produces unwanted odors.
1 6 TROUBLESHOOTING Continued WARNING: If you smell gas Shut off gas supply. Do not try to light any appliance. Do not touch any electrical switch; do 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...
Page 17 - SPECIFICATIONS; REPLACEMENT PARTS; FLOOR MOUNTING STAND; Optional FAN Kit
1 7 SPECIFICATIONS Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).* For purposes of input adjustment. REPLACEMENT PARTS Note: Use only original replacementparts. This will protect your warrantycoverage for parts replaced underwarranty. PARTS UNDER WARR...
Page 19 - KEY
1 9 PARTS LIST THERMOSTAT MODELS ML200TBA, ML300TBA This list contains replaceable parts for your heater. When ordering replacementparts, follow the instructions listed under Replacement Parts on page 17 of thismanual. KEY NO. 1 23456789 10 11 12131415161718192021222324 24-124-2 2526272829 ML300TBA ...
Page 20 - NON-THERMOSTAT MODELS
2 0 ILLUSTRATED PARTS BREAKDOWN NON-THERMOSTAT MODELS ML200HBA ML300HBA ODS/Pllot Assembly
Page 21 - PARTS LIST
2 1 PARTS LIST ML200HBA ML300HBA This list contains replaceable parts for your heater. When ordering replacementparts, follow the instructions listed under Replacement Parts on page 17 of thismanual. KEY NO. 1 23456789 10 11 1213141516171819202122232425262728 28-128-2 2930313233 ML300HBA PART NO. MB...