Related Manuals for heatco EM Series
Summary of Contents for heatco EM Series
- Page 1 EM Series Application High Efficiency Condensing Duct Furnace ANSI Z83.8 (2016) - CSA 2.6M (2016) – Gas-Fired Duct Furnace 161202...
- Page 2 EMA Series - Inputs from 180,000 to 720,000 Btuh EMG Series – Inputs from 90,000 to 360,000 Btuh EM Series units employ a stainless steel primary heat exchanger similar to conventional 80% efficient furnaces, but also incorporate a (recuperative) heat exchanger to extract additional heat from the flue gases.
- Page 3 A fully condensing heater can produce up to 1 gallon of water per hour for every 100,000 Btuh of input. The recuperative heat exchanger tubes are made from super ferritic stainless steel alloy, resistant to the corrosive condensate formed in this heat exchanger. Aluminum fins attached to the exterior tube surfaces enhance heat transfer from the recuperative heat exchanger to the circulating air stream.
- Page 4 CONDITIONS OF APPLICATION Basic application guidelines are similar to mid efficiency furnace applications including: Must be installed on the positive pressure side of the circulating air blower Must be installed in a non-combustible duct or cabinet The Heat exchanger must be properly sheeted to direct all airflow over tubes and eliminate by-pass air for optimum performance.
- Page 5 EM Series Recuperative heat exchanger is located between passes of primary heat exchanger depending on airflow condition. Patent Pending heat exchanger design with the recuperative coil located between primary heat exchanger passes. Circulating air may enter either side of the furnace, reducing the number...
- Page 6 Configurations Maximum 5:1 Turndown 10:1 Turndown 10:1 turndown designs require two induced draft fans per furnace EM furnaces may be installed in series provided the entering air temperature to the downstream furnace does exceed 80...
- Page 7 EM Series - Application Summary Table Location Configurations Eff. % ≥ < 80 < 160 Outdoor, Indoor Parallel heater installations are acceptable for EM Series with all configurations. Duct Furnace Airflow Duct Furnace Top View...
- Page 8 (flue gases) to the outside atmosphere. EM Series duct furnaces are listed for Category II or IV vents. Category II furnaces operate with a negative vent pressure and Category IV furnaces operate with a positive vent pressure.
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Page 9: Outdoor Installations
Outdoor Installations The venting system is designed for direct discharge of flue gases to the outdoors. Vent pipe diameter depends on furnace input rating. See Table below for required pipe diameter for vent installation. All vent piping is installer provided. A coupling is installed on the induced draft fan for attachment of vent pipe. -
Page 10: Side Discharge
Figures – Outdoor Venting Side Discharge 12.0" (0.3m) Min. 18.0" (0.45m)Max. or 90 Elbow Vent Install Pipe Termination Screen 18" (.45m) Minimum above grade or expected snow level For horizontal runs, the vent pipe should be pitched downward ¼” per foot toward the inducer fan drain. - Page 11 Top Discharge Flue gases must be directed downwards...
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Page 12: Indoor Installations
Indoor Installations Installations with Ambient Combustion Air Supply For indoor installations, duct furnaces typically draw combustion air from the space surrounding the heating unit. Customer designed cabinets must have properly sized Combustion air openings must be provided in a panel with access to the burner vestibule area. Installation must be in an unconfined space with sufficient volume for all appliances located in the space. - Page 13 Vertical One-Pipe Vent Side Discharge Top Discharge To Building Exterior Standard Vent Drip Leg (US only) Connect condensate drainper Section VII For top discharge orientations, a flue exhaust drain coupling is provided and must be installed for proper condensate drainage from venting system.
- Page 14 Horizontal One-Pipe Vent Figure a) To Building Exterior Pitch Vent pipe up ¼” per foot Connect to condensate drain Figure b)
- Page 15 Vent pipe diameter and maximum vent length are determined by furnace input rating as shown in Table. Flue Exhaust (Vent Pipe) Max. Vent Model Input (Btuh) Pipe Size Diameter Material Length 90,000 3" 70’ 135,000 3" 180,000 4" 225,000 4" 270,000 4"...
- Page 16 Outdoor Combustion Air Supply – Separated Combustion Provide outside combustion air in applications with poor indoor air quality or when furnace is located in de-pressurized area. Combustion air is supplied from outdoors into the furnace burner compartment through a properly sized pipe attached to the air intake collar. This duct furnace installation requires a two (2) pipe separated combustion vent system with separate air intake and vent pipes terminating in the same pressure zone.
- Page 17 Separated Combustion - Indoor Vertical Venting Side Discharge Top Discharge To Building Exterior 18.0" (0.3m) Min. Vent Pipe Combustion Air Inlet Standard Vent Drip Leg (US only) Connect condensate drains...
- Page 18 Separated Combustion - Indoor Horizontal Venting Combustion Air Inlet To Building Exterior Pitch Vent pipe up ¼” per foot Connect condensate drains Both the furnace and vent system must be connected to a condensate removal system. The maximum vent length is the equivalent length of pipe, including any elbows and fittings.
- Page 19 Vent pipe and air inlet pipe size depends on input rating of the furnace. See Table following for sizing and materials based on model size and input rating. Minimum length is 5 ft. Vent and Combustion Air Pipe Sizing for Separated Combustion Combustion Air Inlet Flue Exhaust (Vent Pipe) Max.
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Page 20: Vertical Vent Termination
Vertical Vent Termination 6" (152mm) 90o Elbow Minimum or 90 Elbow 24" (0.6m) Minimum Install From adjacent wall Termination or building 12" (0.3m) to 18" (0.45m) Screen Above combustion air intake) Roof flashing at Install all penetrations 12" (0.3m) Minimum Screen Above roof or snow line Vent Pipe... - Page 21 Horizontal Vent Termination 12.0" (0.3m) Min. Vent Pipe 18.0" (0.45m)Max. Vent Pipe 12" (0.3m) Minimum from adjacent wall 90o Elbow Combustion Air 12" (0.3m) Inlet Pipe Minimum 12" (0.3m) Combustion Air Minimum 36" (0.9m) Minimum Inlet Pipe Above grade or snow line 24"...
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Page 22: Condensate Drains
Condensate Drains Condensate is produced in furnace sections during heating operation. Installation requires an individual condensate drain system for each duct furnace section. A fully condensing furnace operating at 100,000 Btuh can generate up to 1 gallon of condensate per hour. An overflow switch is provided on the collector box to shut-off the furnace in the event that condensate accumulates in the flue collector box. - Page 23 A waterless condensate trap kit is included for the drain system. Traps must be installed in the vertical position only, with the float located above the spring. Never install horizontally. For outdoor installations, route condensate drain directly from duct furnace into building as shown in the following Figures.
- Page 24 For outdoor installations, heater configurations shown below must use the supplied drain tube installed on induced draft fan tap and in-line with the heating unit condensate drain as shown.
- Page 25 The drains must be extended through the heater base and into the heated space below to prevent freezing of condensate in the drain piping. Trap must be located in a heated space or protected to avoid freezing. Where condensate drain lines are located outdoors, in a non-heated space or in a space where temperatures may fall below freezing, the drain line(s) must be protected.
- Page 26 Use a 2.5 to 5 watt per foot (0.003 to 0.005 kW per meter) at 115 VAC, 40 F (4.4 self-regulating, shielded and waterproof heat tape. Wrap the drain trap and drain line(s) with heat tape and secure with ties. Follow the heat tape manufacturer’s installation recommendations Once condensate drain lines are indoors, a common condensate drain header (1”...
- Page 27 Condensate Drains for Indoor Installations – Vertical Vent Vent To Building Exterior Standard Vent Drip Leg (US only) EZ Trap cleanout (provided with trap kit) EZ Trap (EZT150) (provided with trap kit) ¾” PVC Pipe to sanitary sewer connection for condensate removal ¾”...
- Page 28 In top discharge exhaust configurations, the induced draft fan requires a drain connection to the fan housing. A drain hose (of proper temperature rating) is provided and should be attached as shown in figure below. For installations where the building drain lines are above the level of the duct furnace drain system, a condensate pump is required.
- Page 29 Condensate Drains for Indoor Installation – Horizontal Vent Vent Pipe to Building exterior Pitch Vent pipe Standard Vent up ¼” per foot Drip Leg (US only) EZ Trap cleanout EZ Trap (EZT150) (provided with trap kit) (provided with trap kit) ¾”...
- Page 30 Multiple Heaters and Multiple Inducer Fan Models Heating Units may be stacked for parallel application. Individual units must have separate drain lines from the flue box to the indoors. Exhaust vent drains may be joined to a common condensate drain header (3/4”...
- Page 31 Certain furnace models incorporate 2 induced draft fans. Each induced draft fan and its corresponding vent/collector box must have its own individual trapped drain line. Dual condensate drains must remain separate through roof penetration and each must be connected to its own individual P trap as shown in diagram below. Drain lines may be joined to a common pipe downstream of P traps.
- Page 32 Common Condensate Manifold for Condensate Disposal The pre-piped drain lines should be routed through the roof curb and indoors. A common condensate manifold should be used to access drain location and dispose of condensate to an indoor sewer line. The number of drain lines will vary depending on the number of unit heaters.
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Page 33: Electrical Supply
IX. Electrical Supply All electrical equipment must be grounded and wired be in accordance with the National Electric Code (ANSI/NFPA 70) in the United States, and the Canadian Electric Code (CSA C22.1), in Canada The furnace control system requires both line voltage and low voltage circuits with correct polarity, and clean neutral and ground.
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