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Williams 2903512 - page 1
Installation Instructions and Owner’s Manual Direct-Vent Wall Furnace - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. - WHAT TO DO IF YOU SMELL GA S • Open all windows. • Do not try to light any appliance. • Do not touch any electrical switch. • Do not use any phone in y ...
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Williams 2903512 - page 2
Table of Contents General Information and Technical Data Instructions to Installer ………………………………………………………………… ………………………………………… ………1 Safety and General Warnings …………………… …………………………………… ……………………………? ...
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Williams 2903512 - page 3
Safety Rules and General Warnings DO NOT OPERATE THIS FURNACE WI THOUT THE FRONT P ANEL INSTALLED • Due to high temperatures, the furnace should be located out of traffic and away from combustible materials such as furniture and draperies . • More frequent cleaning may be requi red due to excessive lint from carpeting, bedding material s, etc. ...
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Williams 2903512 - page 4
Some Points to Remember • Learn to recognize the odor of LP Gas. Your local LP Gas Dealer ca n give you a ”Scratch and Sniff” pamphlet. Use it to find out what the propane odor smells like. If you suspect that your LP Gas has a weak or abnorm al odor, call your LP Gas Dealer. • If you are not qualified, do not light pilot lights, perform se ...
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Williams 2903512 - page 5
Installation Installation should be done by a QU ALIFIED SERVICE TECHNICIAN. The furnace must be located on an o utside wall. WARNING: For the installati on of this furnace, the following items must be used as a v ent air intak e system: Wall Installation Minimum clearances from combustible materials: External Vent Cap • Furnace to the top surfac ...
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Williams 2903512 - page 6
A. Clearance above grade, verand a, porch, deck or balcony 12-inches (30 cm ) minimum. (3) B. Clearance to window or do or that may be opened 12- inches (30 cm) minimum. (3) C. Clearance to permane ntly closed window (minimum 12- inches (30 cm) recomme nded to prevent condensation on wind ow. D. Vertical clearance to ventilated soffit located above ...
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Williams 2903512 - page 7
Outside Location for Vent Terminal Upon delivery, check to make sure the p ackaging has not been damaged. 1. Remove the furnace from box/packaging taking care not to damage the paper template to be used to mark the holes for mounting the furnace. 2. After marking the appropri ate holes using the above mentioned template, make a 2-inch diameter hol ...
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Williams 2903512 - page 8
12. When the inside installation is com plete, proceed to the out side location of the aluminium vent cap on the external wall. The vent cap should perfectly match the pipe end. Mark the lo cation of the three holes for the scre w anchors. (Figure 7) The flue grid must be vertical. 13. Remove the vent cap and drill all the necessary hole s (diame t ...
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Williams 2903512 - page 9
Gas Conversions Converting to another gas type mu st be performed by a qualified service technician. If the type of th e gas supplied to the dwelling is not the same type as your furnace (natural or LPG gas), it must be converted. It will be necessary to do the following: 1. Change nozzle. a. Remove the screw indicated to the right. 2. Without remo ...
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Williams 2903512 - page 10
Gas Supply Check all local codes for requireme nts, especially for the size and type of gas supply line req uired. On natural gas lines less than 15” (380 mm) long, use 1/2” tube; on longer runs, use 3/4” ir on tube or equal. On LP gas lines, consult LP ga s supplier. Installing a New Main Gas Shutoff Valve Each appliance should have its own ...
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Williams 2903512 - page 11
First Firing of the Furnace Start the furnace following the instructio ns given in the “Opera ting Instructions“. The initial pilot lighting may be difficul t due to air trapped in the gas lines. During initial firing of the furnace, re sidual manufacturin g grease will bake-out and smo ke will occ ur which is not a health danger. To prevent nu ...
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Williams 2903512 - page 12
Electrical Wiring FLAME VIEW LAMP (GREEN LAMP) SF GAS VALVE 1 (SAFETY SHUTTER) EV LOCK-OUT LAMP (RED L AMP) SB EV1 CURRENT TRANSF ORMER 120-24 V TR HI-LO FLAME OPERATOR (*) EV2 RESET AND SUMMER – WINTER SWI TCH (*) Z1 FAN MOTOR (n. 2 MOTORS ON 8001/ 8002) M HI-LO FLAME AND FAN SPEED SWITCH (*) Z2 OVERHEAT THERMOSTAT M1 MANUAL – PROGRAM MODE SWI ...
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Williams 2903512 - page 13
Operating Instructions Before operating the furnace, read carefully all wa rnings and safety information i n this manual. A . T hi s app li anc e do es no t ha v e a pi l o t w hi c h m us t F ol l ow t he ga s sup pl i e r ' s i ns t r uc ti ons . be l i g hted by m eans of th e pi ez o ig ni t er i ns t al le d - If y o u c ann o t r eac h y ...
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Williams 2903512 - page 14
W HA T T O DO IF T HE RE D L AM P IS L IT T hi s appl i anc e has an e le c t r o ni c fl am e s uper v is io n de v i ce. If t he f l am e di s a ppea r s th e ga s f lo w w il l be aut om ati c al l y s h ut o ff an d th e r ed lam p wi l l l i g ht i ns tea d of th e gr ee n on e. T he a ppl i anc e w i l l a ttem pt to r eli gh t i f yo u do ON ...
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Williams 2903512 - page 15
Servicing All servicing activities must be carried out by a qualified se rv ice technicial or a service agency. The home own er may not service the furnace. The home owner must rea d this secti on to be informed of the periodic ma intenance and che cks the required. All servicing (except on vent sys tem) must be carried out with the external casing ...
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Williams 2903512 - page 16
Annual Maintenance Requirements 1. Clean fan blades. 2. Clean air blower. 3. Check and clean sili cone red pipes. 4. Check air flow switch. 5. Clean and check exhaust flue pipe a nd air intake pipe. Check red O-Ring G asket (NRNG003). If it is damaged, replace it. 6. Check for ga s leaks on all conne ctions. 7. Check and adjust gas pre ssure. Gas i ...
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Williams 2903512 - page 17
Programmable Timer The programmable timer allows precise operating an d timing control and is standard on this furnace. (Figure 10) Overview The programmable timer has the following feature s: • Long life lithium battery • Daily and weekly programs • One minute minimum switching time • Quick progressi on • Sixteen programs (8 on and 8 off ...
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Williams 2903512 - page 18
Setting and Adjustment 1 2 3 4 5 6 7 0 :00 1 2 3 4 5 6 7 E EE 1 2 3 4 5 6 7 0 :00 1 2 3 4 5 6 7 0 :00 1 2 3 4 5 6 7 0 :00 ☼ 1 Initial Conditions A. Set the Setting/Regulator switch (Figure 10-B) in RUN position (ce nter). Press the Reset button R. The display will flash. B. With the Setting/Regulator switch sele ctor in positi ...
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Williams 2903512 - page 19
D. Press the Day Setting, (1……7, Figure 11-D) bu tton to program another day or block of days. E. To set further programs repeat steps item B through D above. NOTE: When the same ON and O FF times are desired for different days of the week, the setting procedu re may be simplified. • 1-2-3-4-5 (from Monday through Friday) • 1-2-3-4-5-6 (fro ...
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Williams 2903512 - page 20
Troubleshooting Starting Sequence (Electrical) Step 1 1. Check L1 – L2 (Supply 120 V, 60 Hz) 2. Check M9 (Main fuse) Troubleshooting Step 1 Point 1 (L1-L2) No voltage (120 V). Check the electrical supply line, wirin g and connectio ns. Point 2 (M9) Fuse damaged. Check the electrical supply line and repla ce the fuse. Summer Mode Step 2 3. Check Z ...
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Williams 2903512 - page 21
Troubleshooting Step 3 Point 5 (Z1) Z1 is open and no ignition. Check wiring and conn ections. If everything is okay, replace the switch. Point 7 (M2) M2 is closed and fan thermostat temperature lower than 104 °F. Check wiring and connections. If they are okay, replace the thermostat. Step 4 8. Check Z9 (Roo m thermostat). Close the thermostat wit ...
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Williams 2903512 - page 22
Point 13 (TR) No inlet voltage (120 V). Check 5 pole conne ctor and control box. If everything is okay, replace the connector . No outlet voltage (24 V) during ignition. Check wiring and conn ections. If everything is okay, replace the transformer. Point 14 (EV1) Valve closed during ignition (Z2 down ). Check wiring, connections and voltage. If eve ...
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Williams 2903512 - page 23
Replacement Parts TR – 120/24V Transform er Part Number: JTRS017 Ignition Control Box Part Number: JCNT019 NP – Pressure Switch Part Number: JPRS009 Z9 – Room Thermostat Part Number: JTLT005 Z1 – Reset and Summer/Winter Switch Part Number: NTST000 Z8-Z3 – Timer and Manual - Program Mode Switch Part Number: N19800202 Z2- Hi-Lo Flame and Fa ...
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Williams 2903512 - page 24
RP8 : Flame Sensor Part Number: JLTT015 RP7: Spark Igniter (2 piec es) Part Number: JLTT023 S – Combustion Blower Motor Part Number: JMTR020 M1 – Overheat Thermostat Part Number: JTRM006 M2 - Fan Thermostat Part Number: J12301018 Fan Blades (4 Pieces) Part Number: VVNT003-VVNT002 M - Fan Motor Part Number: (2 Pieces) JMTR018 Williams Furnace Co ...
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