THE NEXT GENERATION OF THE INDUSTRY STANDARD PLENUM HEATER Installation & Operating Instructions EM-WU(WD)***S*-SL1 Series – One Stage HP or One or Two Stage AC See specification page for model number breakdown and details Dual Heat Combinations Heat pump – WarmFlo Select – gas/oil furnace, 1 or 2 burner stage, single speed or ECM blower AC – WarmFlo Select – gas/oil furnace, 1 or 2 burner stage, single speed or ECM blower AC, 2 stage – WarmFlo Select – gas/oil furnace, 1 or 2 burner stage,
Table of Contents Specification 1 Product Dimensions 1 Introduction 2 Installation Requirements 3 Mechanical Installation Upflow 4 Downflow 7 Horizontal 8 Electrical Hookup 9 Additional Hookup or Special System Equipment Concerns 12 Field Setup or Programming 14 Operation Indicators 19 Troubleshooting 20 Manual Reset 22 System Airflow 22 Installation Checkout 23 Drawings Included: 05/15/2009 EH709 EH712 UAW358 UAW359 UAW360 UAW361 XX017 EI709
Specification Model Number EM-W*102S+ EM-W*153S+ EM-W*204S+ EM-W*254S8 kW rating BTUH Voltage/Phase Circuit Breaker Source Feed Elements Max. Temp.
Introduction The intended application for this product is summarized on the cover page. If this does not fit your application needs or HVAC system design, do not modify or attempt to use this model other than its designed and intended usage.
Installation Requirements 1. All installation work must be performed by trained, qualified contractors or technicians. Electro Industries, Inc., sponsors installation and service schools to assist the installer. Visit our web site at electromn.com for upcoming service schools. WARNING ALL ELECTRICAL WIRING MUST BE IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND LOCAL ELECTRIC CODES, ORDINANCES, AND REGULATIONS. WARNING OBSERVE ELECTRIC POLARITY AND WIRING COLORS.
Mechanical Installation – Upflow For downflow or horizontal see appropriate section. This upflow section provides more illustrations and details. The installer should review this section and then relate the comments under downflow or horizontal as they apply. This section assumes there is either an A/C or HP A-coil, if there is no coil in the plenum simply proceed without visualizing the presence of the A-coil. Typically this means the WarmFlo Select unit will be directly above the furnace cabinet.
Step 2 Measure plenum width and depth a. Step 1 determines facing side (hole cut decision) b. Width 17” or less – 15” model 18” or 19” – 18” model 20” to 22” – use side baffles as detailed in C-1 23” or greater – must field construct baffling as shown in C-2 c. Depth 20” or less – no baffling 20” or greater – need rear baffling as detailed in C-2 Step 3 Cut insert hole a.
Step 4 Add necessary baffling a. See Step 2 for determination and if required Step 5 Insert unit and bolt in place a. Extend center V deflector to plenum depth b. Do not drill into refrigerant lines c. Note airflow decal d. Seal as required Step 6 Install WarmFlo sensors a. Outdoor (OT) – extend to best location, mount with tip up Attempt to shade from direct sun, north side preferred See electrical section with additional sensor details b.
Airflow Page 1 specification chart shows maximum temperature rise at 55° F. This is simply good HVAC practice and duct works/furnace blower design. The WarmFlo Select controller and its sensing will take care of itself but there is more to the story. It is true that the WarmFlo Select modulating control and the supply sensor adjust the electric heat or element capacity based upon temperature.
necessarily line up the WarmFlo Select control box with the furnace cabinet front. The concern is the cutout in the plenum mating with WarmFlo Select elements. WarmFlo supply sensor installation – notice spacing and positioning comments on drawing EA104. Basically this sensor needs to be in a major air stream, about 20 airflow inches away from the actual electric element. Installation, wiring – except for a shipped loose (included) second hi-limit probe, all electrical, hookup, operation, etc.
Electrical Hookup WARNING DISCONNECT ALL ELECTRICAL POWER BEFORE ELECTRICALLY CONNECTING OR SERVICING THE UNIT. FAILURE TO DISCONNECT THE ELECTRICAL POWER BEFORE WORKING ON THIS PRODUCT CAN CREATE A HAZARD LEADING TO PERSONAL INJURY OR DEATH. Line Voltage The nameplate and/or Installation and Operating Manual specification page provides kW rating and operating current requirements. Select the proper wire size to comply with your type of wire routing and NEC field wiring requirements.
Use care in selecting location so the sensor does not pick up false temperature from the heat pump outdoor unit, from refrigerant line sets, dryer vent, reflection off of steel siding, etc. Also do not install the sensor in a plastic box because it will falsely trap and pick up radiant sun temperature. Other Sensor Related Comments The factory supplied OT cable is 25 feet. If additional cable length is required, you must use the following rules for extending the cable.
Fan Speed Wiring For single blower speed or basic furnace use the standard four wiring points – R, W, C, G. Connect to control board, bottom left. If this is a variable speed blower, GE ECM motor, determine whether the furnace has a Y1 and a Y2 or simply a Y. 1 stage equipment – connect control board bottom left furnace-Y to the highest furnace speed terminal. If the furnace has a Y1 and a Y2 speed typically you’ll connect the WarmFlo Select Y1 to the furnace Y2.
Additional Hookup or Special System Equipment Concerns Special Oil Furnace Comment This controller is designed to interface directly with a furnace fan center containing 24-volt transformer (40VA or larger), blower relay, and a “W” function to operate the furnace.
Load Control, Other Products or Hardware If there is a need to “pass on” the utility load control receiver function to other heating equipment, radiant floor boiler, peak interrupter, etc; there is an isolated contact on this control board. Locate tabs COM/EL/SB. In the electric mode there is an isolated contact between COM and EL. This contact is for low voltage only, 1-amp maximum. Note: There may be a 1 or 2 minute delay between this relay contact action and the actual load control receiver.
Field Setup or Programming It is extremely important the installer properly goes through this section and sets up the various switches to match the installation. Warning: Power-down reset required whenever changing any of the switch positions on the back side of the board. HP Reversing Valve Logic Since this control board creates the reversing valve control wire for the heat pump, it is important the installer select the required logic for the heat pump installed.
Heat Pump – DUAL or NO GAS The three dial switch selections must be matched to the user comfort versus efficiency. Switchover Temperature (SW OVER) – select the temperature to ODT or interrupt the heat pump outdoor unit. With this WarmFlo Select the electric elements continue below this SW OVER set point. If the installer/user desires to also terminate the electric elements at this SW OVER point, this can only be setup using WF-ANZ* Handheld and selecting EL to SB.
Non-Heat Pump – ST and OT This mode also requires the OT sensor and is used (similar to heat pump) associated with the next three dial settings. Outdoor temperature staging enable also applies (same as heat pump) as shown in the chart at the end of this section. Switchover Temperature (SW OVER) – select the temperature to ODT or interrupt the WarmFlo Select unit.
Non-Heat Pump – ST This mode applies to a fixed supply or outlet warm air temperature. Since there is no OT sensor the functions relating to SW OVER, WARM AIR, and front red dial are totally different with different selection. Switchover Temperature (SW OVER) – set at 0, not used. WARM AIR – this dial switch sets or selects the fixed warm air supply temperature, as monitored by the ST sensor. 0 = 100 1 = 104 2 = 108 3 = 112 4 = 116 5 = 119 6 = 122 7 = 124 Factory set on #3.
WarmFlo – Stat Override Timer (SOT) Activated with T-stat call and can be programmed for switchover to standby or full electric. SOT S – this is the longer set timer which allows transfer to standby if something might have happened to the electric system unmonitored. To prevent Electro-Mate manual reset possibility of house freeze-ups, SOT S is set as shown below. SOT E – this must be shorter time than above, is typically used to overcome morning setback pickup issues.
Operation Indicators Front Panel LED’s - Hi-limit – when the hi-limit probe (automatic reset or manual reset) opens this top red LED is on. The electric elements will be interrupted via a safety relay circuit whenever this HL LED is illuminated. PWR ON – indicates good fuse and 24-volt power source from the furnace terminal block. Also can blink if bad sensor. EL mode – this illuminates during electric heat function.
Troubleshooting Comment: Also see the “WarmFlo Information” document (HD320) included with this manual. Sensor Temperature Calibration – both remote sensors are digital electronic and factory calibrated. Normally these do not require field calibration or verification. However, if sensor temperature error is determined, use WarmFlo Analyzer test set or purchase special PC software disc and PC serial port cable.
Troubleshooting/Repair Helps 1. This WarmFlo controller contains several interference suppression components, but as an electronic logic product, unpredictable and unusual transients or interferences may sometimes cause strange results. If the WarmFlo controller is “acting strange”, one immediate step would be power down reset. Simply turn off the 24-volt source power (probably furnace or air handler circuit breaker), when the green LED goes out, count to 10, and re-energize power supply. 2.
Handheld Analyzer/Laptop Software This test tool and/or software is available for temperature offset, field altering the program chip parameters and setup, and general assistance for troubleshooting. The WF-ANZ*, version 4.12 update, now can be used to real time calculate CFM. See the enclosed “WarmFlo Information” document (HD320) for functional details. MANUAL RESET Located behind the hinged control board door is a 250°F manual reset. This breaks the circuit for all electric elements.
Installation Checkout Insert plenum thermometer 6” to 8” above the electric element section, position to measure the warm air from the electric elements. Proceed with the following procedure, observing the various staging action, element power current, and the outlet temperature. Turn on system in heat mode and verify proper heat pump and WarmFlo Select operation. o If it is above 50° F OT, the electric elements may be disabled within the internal logic.
Electro Industries, Inc. Limited Product Warranty Effective February 5, 2009 Electro Industries, Inc. warrants to the original owner, at the original installation site, for a period of two (2) years from date of installation, that the product and product parts manufactured by Electro Industries are free from manufacturing defects in materials and workmanship, when used under normal conditions and when such product has not been modified or changed in any manner after leaving the plant of Electro Industries.
THESE WARRANTIES DO NOT COVER: 1. Costs for labor for removal and reinstallation of an alleged defective product or product parts, transportation to Electro Industries, and any other materials necessary to perform the exchange, except as stated in this warranty. Replacement material will be invoiced to the distributor in the usual manner and will be subject to adjustment upon verification of defect. 2.
