CONSULT LOCAL AUTHORITIES IF IN DOUBT ABOUT YOUR LOCAL FIRE SAFETY REGULATIONS. ALL INSTALLATIONS MUST BE MADE IN ACCORDANCE WITH LOCAL AND STATE OR PROVINCIAL CODES WHICH MAY DIFFER FROM THIS MANUAL. IMPROPER INSTALLATION WILL RESULT IN VOIDING OF WARRANTY. TW2000 WOOD-FIRED BOILER – INSTRUCTION MANUAL CONTENTS SECTION 1 – OPERATING INSTRUCTIONS Pg. Specifications 2 1.1 Introduction 3 1.2 Wood-Burning 3 1.3 Storage of Wood 4 1.4 Maximum Solid-Fuel Charge 5 1.5 Maintenance 5 1.5.1 Cleaning 5 1.6

a. If the return air filter is on the left or right side of the furnace it is a side return b. If the air filter is on the bottom of the furnace then you have a bottom return. c. If the air filters are on the bottom and the side of the furnace then you have a bottom and side return. You must replace both air filters. Table 1 will indicate 2 filters by using brackets with the number two (2). d. If the air filters are on both sides of the furnace then you have a two sided return. You must replace

req’d) 46 TUBING, SILICONE (Preformed) 47 TUBING, SILICONE (Gray, .188 ID, 1.25 ft. req’d) 48 GASKET, COMBUSTION BLOWER 49 GASKET, CONDENSATE PAN 50 GASKET, UPPER CONDENSATE PAN (2 Req’d) 51 GASKET, GAS CONTROLS 52 GASKET, CONDENSING COIL 53 GASKET, COMBUSTION AIR TRANSITION 54 55 VENT PIPE 2” X 15.25” LG. 56 GROMMET, MOTOR (3 Req’d) 57 FERRULE (3 Req’d) 58 COMBUSTION BLWR RESTRICTOR 59 60 RETAINER, SQUARE 61 RESTRICTOR, TUBE 62 WASHER, FLAT FIBERGLASS (2 Req’d) 63 64 HARNESS, MAIN WIRING 65 MOU

Gradual transitions are preferred for greatest efficiency. Not more than four inches per linear foot (approximately 20° angle) should be allowed (Figure 3). 5. Connect the vertical duct section to the elbow. Wedge a wood block between floor and elbow for support (Figure 15). 6. Seal all joints in the return air system downstream from the air filter with duct tape to prevent dust from entering the air stream. Tape is usually applied on the Figure 11 Air Flow Turning Vanes Figure 13 Figure 14 outs

This electric or fossil fuel auxiliary. SPECIFICATIONS 1F94-371: 7 Day programming; residential applications ELECTRICAL DATA Electrical Rating: 20 to 30 VAC, 50/60 Hz with common 0.05 to 1.5 Amps per terminal 2.5 Amps maximum total load (all terminals combined) Standard Systems: Single-stage or two-stage compressor heat pump. THERMAL DATA Setpoint Temperature Range: 45° to 99°F (7° to 37°C) Operating Ambient Temperature: 32° to 110°F (0° to 43°C) Operating Humidity Range: 90% non-condensing max.

This thermostat offers you the flexibility to design heating and cooling programs that fit your needs. Features: • Separate program for each day of the week • Simultaneous heat and cool program storage • Preprogrammed temperature control • Four separate time/temperature settings per 24 hour period This thermostat is intended for use with a 24 volt system; do not use this thermostat with a millivolt or line voltage system. If in doubt about whether your wiring is millivolt, line, or low voltage,

DESCRIPTION The type 668 Oil Burner Control provides safe operation of oil burners on heating plants where ignition during the entire burner cycle is desired. The 668 is used with the 956 Flame Detector * Formerly called constant ignition. PRECAUTIONS If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic electricity and wiring. Do not exceed the specification

This feature gives unusual speed of response to rapid changes of water temperature thereby preventing thermal lag. It has open on rise contact action. This control may be used as a high limit or as a low limit control. These controls have special contacts which are suitable for use on low voltage and millivolt (thermocouple generator type) circuits as well as line voltage gas valve and motor loads. DESCRIPTION THESE CONTROLS MUST BE INSTALLED BY A QUALIFIED INSTALLER. Do not exceed the specifica

DO NOT LET WIRES FALL BACK INTO WALL. 3. Connect wires beneath terminal screws on subbase using appropriate wiring schematic (see figs. 3 through 8). 4. Place subbase over hole in wall and mark mounting hole locations on wall using subbase as a template. (Installation instructions continue on page 5.) TABLE 1. OLD THERMOSTAT IDENTIFICATION OLD THERMOSTAT TYPE OLD THERMOSTAT TERMINAL IDENTIFICATION Type 1 4 W RC Y G Type 2 RH W RC Y G Type 3 M H V C F Type 4 R5 4 Y6 G Type 5 R W Y G TABLE 2. WIRE

See Figure 7. The heating cycle is complete, and ready for the start of the next heating cycle. RED-LOW SPEED BLU-MEDIUM SPEED MOTOR LEADS BLK-HIGH SPEED BLK BLU RED 60 180 COOL HEAT PARK PARK LINE XM 120 FAN OFF ADJUSTMENT SWITCHES FIGURE 7: Typical Heat/Cool Speed Tap Connections Unitary Products Group 035-19592-001 Rev. C (0204) If the flame is not detected within 2 seconds of the gas valve opening, the gas valve is shut off and a retry operation begins. If the flame is lost for 2 seconds dur