heatco HM Series Installation Instructions Manual
Duct furnace modules
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OEM
INSTALLATION INSTRUCTIONS
HM and HH Series
Duct Furnace Modules
3035443
ANSI Z83.8 (2016) - CSA 2.6 (2016) – Gas-Fired Duct Furnace
HM Series Modules are a Recognized Furnace Component
Design Certified by Intertek Testing Services (ITS / ETL)
For Indoor or Outdoor Installation and
Installation Downstream from Refrigeration Systems
This Product is intended for installation by Original Equipment Manufacturers
Of Listed Heating Equipment in Duct or Cabinet mounted Applications
on the Positive pressure side of the circulating air blower
The duct furnace modules covered by these instructions become a component of a "Listed" product,
subject to the guidelines of application provided in these instructions and as
designated by the Certifying Agency in the Manufacturer's Listing Procedure
Manufactured by
Heatco Inc
50 Heatco Court
Cartersville, Ga. 30120
HM-OEM-MAN-7-2016-E
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Summary of Contents for heatco HM Series
- Page 1 Duct Furnace Modules 3035443 ANSI Z83.8 (2016) - CSA 2.6 (2016) – Gas-Fired Duct Furnace HM Series Modules are a Recognized Furnace Component Design Certified by Intertek Testing Services (ITS / ETL) For Indoor or Outdoor Installation and Installation Downstream from Refrigeration Systems...
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Page 2: Table Of Contents
Inspection on Arrival This duct furnace module was test fired and inspected at the factory prior to crating and was in satisfactory working order. A copy of the Test and Inspection sheet is included in the information package provided. Inspect the packaging on delivery for any signs of damage. -
Page 3: General Instructions
General Instructions for HM Series Furnace Modules This furnace module must be installed in a non-combustible duct or cabinet on the positive pressure side of the circulating air blower and is not designed to have any portion of the heat exchanger exposed outside the duct or cabinet in which this furnace module is housed. - Page 4 Additionally the Original Equipment Manufacturer of the “Listed” equipment shall provide the following in accordance with its product listing: An enclosed vestibule area to house and protect gas controls, burner assemblies, induced draft fans and electrical controls. Openings for combustion air must be provided in a panel or door (except separated combustion systems) with direct access to the vestibule area where the burners and draft inducer are located.
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Page 5: Furnace Module Application
Furnace Module Application Figure 2 – Typical Installation Heat Exchanger on positive pressure side of circulating air fan Integral High 2 ft. Min. Auxiliary Manual Limit Switch Reset Limit Max. Discharge Temperature 160 oF Min. – 40 oF above inlet air Air Switch/ Probe 1.75"... -
Page 6: Airflow Distribution / Maximum Airflow
Airflow Distribution & Multiple Heaters Application Selection of furnace modules to provide desired conditions requires careful consideration of necessary discharge air temperature, airflow, pressure drop, air tunnel dimensions and furnace configurations. Furnace modules may be installed individually, in tandem or in parallel. -
Page 7: Auxiliary Limit And Airflow Proving Switch
Auxiliary Limit and Airflow Proving Switch An airflow proving switch and auxiliary manual reset temperature limit must be installed in the duct furnace module application. The airflow switch proving prevents operation of the gas furnace in the event of failure or restriction of the circulating air fan. An airflow probe should be installed upstream of the heating section (See Fig. -
Page 8: Duct Furnace Installation
nstallation Verify that the following before installing the furnace module 1. Electrical supply and gas supply match ratings and gas type marked on the furnace module rating plate before installing the duct furnace insert. 2. Furnace module is to be installed in orientation marked on vestibule. Orientation is specific to airflow direction through the heating section of the unit. -
Page 9: Furnace Component Identification
Figure 7 -Furnace Component Identification Combustion Air Pressure Switch Modulator Valve (Modulating systems only) Flame Rollout Two-Stage Switch Gas Valve Flame Sensor Gas Inlet Connection Hi Limit Switch Manifold Pressure Tap Induced Draft Fan Assy. Draft Inducer Motor Spark Igniter Motor Support Bracket Wire Harness... -
Page 10: Gas Supply Piping
In furnace modules with bottom mounted horizontal burner, condensate will drain from the open end of the tubes. A condensate collection pan which attaches to the burner assembly is available as an option. Additionally, condensation may form on surfaces such as the furnace vestibule panel (header plate) in contact with the conditioned air. -
Page 11: Venting
Figure 9 The duct furnace module gas piping was leak tested prior to shipping. However, during shipping and installation connections may have loosened. Check for leaks using a soap solution and correct any leaks before placing furnace in operation. WARNING ! WARNING ! When pressure testing at ½... -
Page 12: Indoor - Vertical (Category I)
Where sufficient clearance for proper horizontal venting cannot be provided, or in jurisdictions requiring a 4 foot separation between flue gas discharge and combustion air inlet, flue gases need to be vented vertically. Refer to Figure 11 for suitable venting method. A vent adaptor is required to transition from the rectangular ID fan discharge to round vent pipe. -
Page 13: Indoor - Horizontal (Category Iii)
Figure 12 – Indoor Vertical Venting Listed Vent Terminal Use Insulated Vent Outdoors Thimble 5 ft. Min. Roof (1.52m) 2 ft. Min (0.61m) 1/4in. (6mm) pitch per 1ft. (305mm) horizontal Condensate See Table 1 for Drain vent diameter 10 ft. (3.05 m) Max. (Not to exceed 75% Vertical Flue Height) Horizontally Vented Duct Furnaces -Category III... -
Page 14: Separated Combustion
Figure 13 – Indoor Horizontal Venting 5 ft. (1.52 m) Min. Note: Listed Horizontal Vent 50 ft. (15.2m) Max. Equiv. Length Termination may be used In place of T Fitting Pitch pipes down1/4in. (6mm) pitch per 1ft. (305mm) horizontal run to 1 ft. - Page 15 Figure 14 – Vertical Venting 6 ft. (1.8 m) Min. Listed Vent To Wall or Terminals Adjoining Building Combustion Air Inlet 2.5 ft. (0.75m) Exhaust Vent 18 in. (0.46m) Min. Min. (* See Note) 18 in. * Note: Provide sufficient (0.3m) Roof Deck clearance (height) to exceed...
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Page 16: Operation, Adjustment, Start-Up
Operation and Adjustment 1. This furnace module does not have a pilot. It is equipped with a direct spark ignition device that automatically lights the gas burner. DO NOT try to light burners by hand. 2. BEFORE OPERATING, leak test all gas piping up to heater gas valve. Smell around the unit area for gas. DO NOT attempt to place heater in operation until source of gas leak is identified and corrected. - Page 17 Figure 16A– Honeywell VR8305Q Gas Valve Stage (Hi Fire) Manifold Stage (Lo Fire) Manifold Pressure Adjustment Pressure Adjustment (3/32” Allen Key) Electrical Connection Block 1/8” NPT Inlet Manual Shut-off Pressure Tap Control Knob Figure 16B – White Rodgers 36H Gas Valve 1/8”...
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Page 18: Electrical Supply And Ratings
These documents should be retained by the air handling unit manufacturer for future reference. A separate Operating and Maintenance Instruction package is provided with each heating including these documents. This package should be included with the manufacturer’s instructions sent with the air handling unit. Heatco Inc. 50 Heatco Court Cartersville, Ga. 30120...
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