Greenwood 300 Owner's Manual

Hydronic furnace

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Greenwood Hydronic Furnace

MODELS 100, 200, 300

Owner's Manual

BE SURE TO READ THIS MANUAL AND KEEP IT NEAR THE FURNACE FOR

EASY REFERENCE

For the latest information and manual for your Greenwood Furnace, refer to the "SUPPORT"

section of the Greenwood website: www.GreenwoodFurnace.com

UL-391-1995

B366.1-M91

Greenwood furnaces are certified to meet

and CAN/CSA

standards

for safety for solid-fuel fired indoor heating appliances

V 4.1

GREENWOOD TECHNOLOGIES, LLC

St, Ste. 120 • Bellevue, WA • 98005

13427 NE 20

800-959-9184

Support: 877-436-6191

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Page 1 MODELS 100, 200, 300 Owner’s Manual BE SURE TO READ THIS MANUAL AND KEEP IT NEAR THE FURNACE FOR EASY REFERENCE For the latest information and manual for your Greenwood Furnace, refer to the “SUPPORT” section of the Greenwood website: www.GreenwoodFurnace.com UL-391-1995 B366.1-M91...
Page 3: Table Of Contents
TABLE OF CONTENTS Section Page Safety Certifications Emissions Certifications Introduction and How the Furnace Works Specifications General Installation  Installation requirements summary checklist  Unpack and inspect the furnace  Unloading and locating the furnace  Minimum furnace installation clearances ...
Page 4  Annual shutdown maintenance  System flush Troubleshooting  Furnace is not heating  Creosote or condensation is forming  Furnace is over heating  Cracks in the firebox refractory  Chimney Warranty – Greenwood Furnace Installation Checklist Warranty – Greenwood Furnace Warranty...
Page 5: Safety Certifications
Certifications SAFETY CERTIFICATIONS OMNI-Test Laboratories, the leading independent test laboratory for wood-burning products, has tested Greenwood's hydronic wood furnace and certified its compliance with:  U.S. standards for solid-fuel and combination-fuel central and supplementary furnaces (ANSI/UL- 391-1995)  Canadian standards for solid fuel-fired central heating appliances (CSA B366.1-M91) The Greenwood test report number from OMNI-Labs is 302-S-01-2.
Page 8: Introduction And How The Furnace Works
To understand how the Greenwood hydronic furnace works, we need to look at the flow of air and wood gases through the furnace and the transfer of heat from the superheated gases to the thermal transfer fluid circulating in the internal heat exchange manifold.
Page 9 Fluid Flow through the Furnace 1. The Greenwood furnace uses a mixture of water and propylene glycol as a heat transfer fluid. Glycol is a non-toxic solution that works like the antifreeze in your car to prevent corrosion and freezing.
Page 10: Specifications
*Heating capacity depends on many factors including home design, construction quality, insulation quality, local climate, type of wood burned, etc. Square footage based sizing is unreliable, always base sizing on sustained output and heat loss calculations. © 2008 Greenwood Technologies, LLC Page 7 V4.1...
Page 12: General Installation
Make sure to identify sources of make-up air in the room where the furnace is located. The Greenwood furnace, exhaust, fans and other appliances all draw air from the room. Be certain there is an adequate source of fresh air to offset these demands or you may create negative pressure in the room and starve the furnace of combustion resulting in draft problems in your flue.
Page 13: Unpack And Inspect The Furnace
(some of the items will be found stowed inside the firebox). If you observe any damage or find any items missing, please you‘re your Dealer or Greenwood Customer Service for instructions (877-436-6191). Each unit is wired for 115 volt operation and plumbed with a temperature gauge, aquastat, air vent, drain valve, and air intake damper motor.
Page 14: Unloading And Locating The Furnace
The Greenwood furnace is certified for safety as an INDOOR APPLIANCE, so you can install it in a walk out basement, shed, out-building or almost any location where the unit is sheltered from the weather and insulated from freezing intake air.
Page 15: Minimum Furnace Installation Clearances
12 inches (30 cm) (all models) Rear 36 inches (90 cm) (all models) Includes allowance for flue Front 36 inches (90 cm) (Model 100/200) Allows firebox door to fully open 48 inches (120 cm) (Model 300) 33 inches (85 cm) (all models) Bottom...
Page 16: Install The Chimney Flue
See “CHIMNEY INSTALLATION” instructions for more information. 4. Plumb the furnace You can plumb your Greenwood furnace to meet almost any heating need in the home. You can:  Supplement an existing hydronic or forced-air central heating system, ...
Page 17: Wire The Furnace
5. Wire the furnace Your Greenwood furnace arrives pre-wired for 115 volt, 60-cycle operation. The basic wiring consists of plugging the power cord into an available outlet or, if required by local code, a dedicated 20-amp circuit with a circuit protector device located in a convenient place near the furnace.
Page 18: Chimney Installation
The outlet collar on all Greenwood furnace models is 8 inches. The model number of your Greenwood furnace determines the minimum size of the connecter pipe and flue. For the Model 100 and 200 Greenwood furnaces, a flue reducer is required to connect the 8-inch outlet collar to the appropriately sized connector pipe.
Page 19: Connecting To An Existing Chimney Flue
Chapter 11 of NFPA 211 3-1.2 -- Standards for Chimneys, Fireplaces, Vents and Solid Fuel-Burning Appliances. 4. The chimney or flue should be at least 12 feet tall and sized correctly for the Greenwood Furnace model installed.
Page 20 When attaching the connector pipe to the chimney, do not push it into the chimney (it may plug the chimney and impede the draft). The following illustration shows proper installation. Installation of the Connector Pipe into an Existing Chimney © 2008 Greenwood Technologies, LLC Page 17 V4.1...
Page 21: Connecting To A New Factory-Made Chimney
Fireplaces, other furnaces, clothes dryers, exhaust fans, and other appliances, all draw air from the room in which they are located. The Greenwood Furnace adds to that draw, so it is important to make sure there is an adequate source of fresh air to offset these demands. Otherwise, you may create negative pressure in the room and starve combustion in the furnace.
Page 22: Measuring And Adjusting The Draft
To operate properly, the Greenwood furnace requires a draft of .05” to .07” WC (water column) (12.45 – 17.44 Pa). Symptoms of an improperly designed or installed flue include visible smoke out the chimney, smoke escaping into the room, creosote buildup in the flue, and/or poor heating performance.
Page 23: Sources Of Equipment And Information
4. American Society of Mechanical Engineers (www.asme.org) *Note – Greenwood Technologies provides these supplier references for your convenience only. We do not endorse the vendor, the equipment they sell, or their prices. Other suppliers may offer similar or identical components and we encourage you to comparison shop.
Page 24: Open Versus Closed Systems
Q: should I connect my system as an open system or closed system? A: It is always best to install the Greenwood hydronic furnace as a closed system, if allowed by local codes and your local inspector. Some jurisdictions require ASME certification for closed systems. ASME is a test method and certification for boilers provided by the American Society of Mechanical Engineers.
Page 25: Schematic--Basic Open System Configuration
Plumbing Installation The following examples illustrate ways to configure the Greenwood hydronic furnace as an open or closed system to meet everyday heating needs. All plumbing schematics shown in this section are for illustration purposes only. Actual systems should be designed for your specific situation by a Greenwood certified plumbing and heating professional and may include control and safety devices not shown in these illustrations.
Page 26: Plumbing Installation
When plumbed as a closed system, a 30 PSI pressure release valve must be installed. The pressure relief valve should have a BTU rating at least as high as the rating of the boiler (100,000 BTUs for the Greenwood Model 100; 200,000 BTUs for the Greenwood Model 200; and 300,000 BTUs for the Greenwood Model 300.
Page 27: Schematic-Open To Closed Radiant Heating System W/ Boil Over Protection
Power failure and boil over protection is addressed with the expansion and cooling tank provided as part of Greenwood's Fluid Management Kit. A Modine heater in the garage serves as a dump zone to even out thermal spikes and capture otherwise wasted heat.
Page 28: Schematic-Closed System Connected To Two Zones W/O Heat Exchanger
All plumbing schematics shown in this section are for illustration purposes only. Actual systems may require control and safety devices not shown in these illustrations. Consult your Greenwood certified home heating and plumbing professional for home heating system design and installation.
Page 29: Schematic-Closed System Connected To Two Zones With Heat Exchanger
Closed system connected to two zones with heat exchanger The configuration below illustrates the Greenwood furnace supplying hot water to a closed system connected via a heat exchanger to the house side to separate the glycol in the boiler from the water in the house. The...
Page 30: Schematic-Open System Connected To Closed Forced-Air System
All plumbing schematics shown in this section are for illustration purposes only. Actual systems may require control and safety devices not shown in these illustrations. Consult your Greenwood certified home heating and plumbing professional for home heating system design and installation.
Page 31: Schematic-Closed System Connected To Closed Forced-Air System
All plumbing schematics shown in this section are for illustration purposes only. Actual systems may require control and safety devices not shown in these illustrations. Consult your Greenwood certified home heating and plumbing professional for home heating system design and installation.
Page 32: Legend Of Schematic Components
Plumbing Installation Legend of Schematic Components © 2008 Greenwood Technologies, LLC Page 29 V4.1...
Page 34: Wiring And Controls
Wiring and Controls WIRING AND CONTROLS The Greenwood furnace is pre-wired for 115 volt, 60-cycle operation. Simply plug the power cord into an available outlet and the furnace is ready for operation. If local code requires a dedicated circuit for the furnace, install a 20-amp circuit with a circuit protector device located in a convenient place near the furnace.
Page 35: Auxiliary Wiring For Thermal Spike Protection
A common method to provide ―thermal spike protection‖ is to operate some or all of the home heating system for a short period after the damper door on the Greenwood furnace closes. By continuing to operate the hydronic system pump(s) or the blower in a forced-air system, excess heat quickly dissipates from the Greenwood furnace.
Page 36: Auxiliary Wiring For Backup Heat From The Main Furnace To Boiler
Most owners want their existing central furnace or boiler to fire whenever there is insufficient output from the Greenwood furnace (i.e., the fire dies down and no one is available to stoke it). This backup protection is achieved with another aquastat and relay (note: these components are not included with the furnace).
Page 37: Power Outages And Boil Over Protection
If you experience frequent or prolonged power outages in your area, we recommend a backup generator. The generator would provide power to the Greenwood furnace as well as the pumps, blowers and other devices in your home heating system. Please consult a licensed electrician for the correct installation and wiring of your backup generator.
Page 38: Greenwood Fluid Management Kit
Source: Available for sale on-line and at many commercial heating supply outlets; you can also find used cast iron radiators. City Water (Pressurized Water Supply) This system flows cold city water into the Greenwood furnace as soon as the power is lost. It incorporates a 115V valve, backflow preventer and metering valve.
Page 39: Operating The Furnace
17. DO NOT let children play around the furnace. To avoid burns or other injury, alert all persons to the hazards of hot furnace surfaces. © 2008 Greenwood Technologies, LLC Page 36 V4.1...
Page 40: First Startup And Cold Startup Each Season
First startup and cold startup each season The Greenwood firebox is made of refractory material which is mixed with water during the manufacturing process. The casting is baked in a high temperature oven to cure the refractory and remove the water.
Page 41 A Greenwood furnace is more efficient than most other wood burning appliances and therefore requires less wood to produce similar heat output. With a little practice you will develop a good sense for how much wood is required to meet your heating needs on any given day.
Page 42: Warm Start
2. Make sure that the air intake damper is open when loading wood into the furnace or starting the fire. Note: If you have installed the Greenwood Heat Retention Kit, press the controller reset button prior to re-loading.
Page 43: Feeding Wood Into The Firebox
What wood to burn Your Greenwood furnace operates with greatest efficiency when burning large, un-split, seasoned wood logs. If the log fits in the door, it will burn. Small logs and split logs are fine too, but they tend to burn faster and slightly reduce the burn time of the load.
Page 44 The withering process draws moisture from the wood. Then, cut the wood to the longest length that will roll through the firebox door. The longer the log, the longer the fire will hold. © 2008 Greenwood Technologies, LLC Page 41 V4.1...
Page 45 4.012 25.7 Pine, Jack 2,669 17.1 Pine, Norway 2,669 17.1 Pine, Pitch 2,669 17.1 Pine, Ponderosa 2,380 15.2 Pine, Western 2,236 14.3 Spruce 2,100 14.5 Spruce, Black 2,482 15.9 Tamarack 3,247 20.8 © 2008 Greenwood Technologies, LLC Page 42 V4.1...
Page 46: Ash Removal
Operating the Furnace Ash Removal Your clean-burning Greenwood furnace requires less frequent cleaning than wood stoves or similar devices. However, when the ash build-up approaches the level of the air intake holes (at the lower rear of the firebox); it is time to clean them out. Please observe the following procedures.
Page 47: Maintenance
Heat Transfer Fluid The heat transfer fluid used in the Greenwood Furnace is a mix of propylene glycol and water. The propylene glycol additive helps prevent rust and freezing in the heat exchanger. If you are using an open system expansion tank with a sight gauge, you should monitor the system fluid level throughout the heating season by checking the sight gauge daily on the side of the expansion tank.
Page 48: Troubleshooting
Some cracks can progress across the full length of the refractory side. These are not structural and will not affect furnace performance or life. If a crack continues to widen, call your local installer or Greenwood Customer Support. © 2008 Greenwood Technologies, LLC Page 45 V4.1...
Page 49: Chimney
Operating the Furnace Chimney problems A good chimney system is essential to the efficient operation of your Greenwood furnace. If you have problems with smoke or a very strong smell in the room where the furnace is located, the chimney may not be drafting properly.
Page 51: Warranty - Greenwood Furnace Installation Checklist
Greenwood Technologies, LLC ♦ 13427 NE 20 St, Ste. 120 ♦ Bellevue, WA 98005 ♦ 800-959-9184 www.GreenwoodFurnace.com V4.1...
Page 52 This page intentionally left blank. Greenwood Technologies, LLC ♦ 13427 NE 20 St, Ste. 120 ♦ Bellevue, WA 98005 ♦ 800-959-9184 www.GreenwoodFurnace.com V4.1...
Page 53: Warranty - Greenwood Furnace Warranty
Greenwood Furnace, Aspen or Pelco Series hydronic furnaces from Greenwood or authorized Greenwood dealers. The warranty registration form and a copy of the original bill of sale must be signed by the customer and the dealer and sent to Greenwood within 30 days of purchase in order to activate this warranty. Under these warranties, Greenwood will, through its authorized dealers, repair or replace, at its option, any Greenwood manufactured part which is found to be defective in material or workmanship during the applicable warranty term.
Page 54 1 year warranty. The stir finger, as described in the Operator‘s Manual carries no warranty. 11. Greenwood shall not be liable for any default or delay in performance under this warranty caused by any contingency beyond its control.
Page 55 This page intentionally left blank. Greenwood Technologies, LLC ♦ 13427 NE 20 St, Ste. 120 ♦ Bellevue, WA 98005 ♦ 800-959-9184 www.GreenwoodFurnace.com V4.1...
Page 56 This page intentionally left blank. Greenwood Technologies, LLC ♦ 13427 NE 20 St, Ste. 120 ♦ Bellevue, WA 98005 ♦ 800-959-9184 www.GreenwoodFurnace.com V4.1...

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