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MODEL
MODEL
Starting Serial Numbers - Page 2
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and
HEATSTAR
MR. HEATER
follow all instructions. Place instructions in a
safe place for future reference. Do not allow
HSU 45
MHU 45 anyone who has not read these instructions to
HSU 75
MHU 75 assemble, light, adjust or operate the heater.
COMPACT UNIT HEATER
WARNING: Improper installation, adjustment, alteration, service or maintenance
can cause injury or property damage
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Starting Serial Numbers MHU45NG -- 260045-09001001 MHU45LP -- 260145-09001001 MHU75NG -- 260775-09001001 MHU75LP -- 260875-09001001 HSU45NG -- 160245-09001001 HSU45LP -- 160345-09001001 HSU75NG -- 160775-09001001 HSU75LP -- 160975-09001001 enerco | Compact Unit Heater operating Instructions and owner’s Manual 2
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wARNINg: wARNINg: YoUR SAFeTY IS IMPoRTANT To YoU AND To o THeRS, FIRe, BURN, INHAl ATIoN, AND eXPloSIoN HAZARD. So PleASe ReAD THeSe INSTRUCTIoNS BeFoRe Y oU KeeP SolID CoMBUSTIBleS, SUCH AS BUIlDING oPeRATe THIS HeATeR. MATeRIAlS, PAPeR oR CARDBo ARD, A SAFe DISTANCe AWAY FRoM THe HeATeR AS ReCoMMeNDeD BY THe gENERAL HAZARD w ARNINg: INSTRUCTIoNS NeVeR USe THe HeATeR IN SPACeS FAIl URe To CoMPl Y WITH THe PReCAUTIoNS AND WHICH Do oR MAY CoNTAIN V ol ATIle oR AIRBoRNe INSTRUCTIoN
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MHU45/MHU75 AND HSU45/HSU75 UNIT DIMENSIONS (N-NATURAL gAS, p-pROpANE) HANgINg BRACKETS MOUNTINg SLOTS (Typical) 5/16 x 3 Inches (8 x 76 mm) AIR FLOw DIMeNSIoN 45 75 A 12 (305) 17 (432) B 5-1/2 (140) 6-1/2 (165) C 4-1/4 (108) 6-3/4 (171) HEAT EXCHANgER (ALUMINIZED STEEL) TOp VIEw ELECTRICAL HANgINg INLETS BRACKETS (2) FLUE ADJUSTABLE gAS DIRECT OUTLET LOUVERS SERVICE INLET DRIVE FAN ACCESS pANEL BACK VIEw SIDE VIEw START–Up AND pERFORMANCE CHECK LIST Job Name: ________________
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TABLE 1 SHIppINg UNIT CLEARANCES The heater is completely assembled. Installation instructions, two mounting brackets (shipped loose), and a flue transition are Top Sides Access Panel included. Check the unit for shipping damage. The receiving party in mm in mm in mm should contact the last carrier immediately if any shipping damage is found. 1 25 1 25 18 457 Bottom Rear Single Wall Vent* in mm in mm in mm REQUIREMENTS – CSA IN THE USA 0 0 18 456 6 152 Installation of gas unit he
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These units are approved for residential applications. For Gas Code, ANSI Z223.1, in the U.S.A., CSA B149.1 Natural Gas installation in a residential garage, these units must be installed and Propane Installation Code, or applicable provisions of local so that burners and ignition source are located no less than 18” building codes. (457mm) above floor. Heater must be located or protected to All gas fired appliances require air to be used for the combustion avoid physical damage by vehicles.
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B – VERTICAL VENTS USINg METAL VENT C – HORIZONTAL VENTINg – gENERAL pIpE – COMMERCIAL AND RESIDENTIAL Common venting is not allowed when horizontally venting the unit heater. INSTALLATIONS The minimum horizontal vent length is three feet (914mm). MHU/HSU compact unit heaters are listed as Category I appliances for vertical vent installations. 1. If possible, do not terminate the horizontal vent through a wall that is exposed to prevailing wind. exposure to excessive 1. MHU/HSU unit hea
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5. Vent termination must be a minimum of 4’ (1.2m) below or 3. Refer to table 2 for maximum vent connector lengths. 4’ (1.2m) horizontally from any soffit vent or under-eave vent. 4. Select a wall termination point that will maintain ¼” rise 6. Vent must be a minimum of 6’ from an inside corner formed per foot slope of horizontal run of vent pipe. The vent by two exterior walls. If possible, leave a 10’ clearance. may be single wall material minimum 26 GSG (0.46mm) galvanized steel or equ
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HORIZONTAL VENTINg - RESIDENTIAL INSTALLATION INDUCED DRAFT BLOwER UpwARD SLOpE 12 INCHES MIN. (30.5CM) FLUE TRANSITION (pROVIDED) VENT TERMINATION CAp LISTED THIMBLE THROUgH COMBUSTION wALL MAY BE SINgLE w ALL (26 gSg) gALV. OR EQUIV. STAINLESS STEEL SEALED ACCORDINg TO THESE INSTALLATION INSTRUCTIONS OR A SINgLE SECTION OF TYpE B-1 VENT. SLOpED: + 1/4 INCH FOR 1 FOOT RUN MINIMUM. NOTE - MINIMUM HORIZONTAL LENgTH 3FT. (914MM), NOT INCLUDINg CAp FOR TERMINATION. MAXIMUM HORIZONTAL LEN
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5. Test for spillage at the draft hood relief opening after five LINE VOLTAgE FIELD wIRINg minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar, or pipe. 6. After it has been determined that each appliance remaining UNIT connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning L1 BLACK appliance to their previous condition of use. 7.
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ignition control board emits radio noise as the sparking process IMpORTANT The heater and its individual shut off valve must is underway. The level of energy may be sufficient to disturb be disconnected from the gas supply piping system during any a logic circuit in a microprocessor controlled thermostat. It is pressure testing of that system at test pressures in excess of 1/2 recommended that an isolation relay be used when connecting psig (3.45kPa). the unit heaters to a microprocessor co
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7. The ignition control will energize the fan approximately 45 ROBERTSHAw 2000DER gAS VALVE seconds after ignition is established. gAS VALVE KNOB SHOwN MANIFOLD 8. After the thermostat demand is satisfied the gas valve IN OFF pOSITION pRESSURE TAp is closed; 5 seconds after the demand is satisfied the combustion air blower is shut off. 9. The control center shall shut off the system fan approximately 150 seconds after the gas valve is de-energized. IgNITION CONTROL LED The ignition cont
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minimum of 5.0” w.c. for natural gas or 10.4” w.c. for LP/ Remember to follow lighting instructions when putting unit back propane gas should be maintained for proper unit operation. into operation after service or maintenance. 2. After line pressure has been checked and adjusted, check If any of the original wire as supplied with the appliance must manifold pressure. Correct manifold pressure is shown on the be replaced, it must be replaced with wiring material having a unit rating plate. Se
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WHITE (COM) BLACK GREEN/YELLOW WHITE WHITE BLACK BLACK wIRINg SCHEMATIC FOR UNITS wITH 6-pIN CONNECTOR gCI-3A (23L53) CONTROL BOARD OPTIONAL THERMOSTAT INSTALLATION BLUE 24V POWER (R) A3 IT IS RECOMMENDED TO USE 18AWG WIRE 24VAC R WHEN INSTALLING THE THERMOSTAT. HOT CONNECT THERMOSTAT WIRING TO FLAME F5 MAXIMUM LOAD NOT TO EXCEED SENSOR TERMINALS ‘R’ AND ‘W’ AS ILLUSTRATED ON 20VA AT 24V, CLASS 2. ONLY WITH MANUAL FAN THE SCHEMATIC DIAGRAM. COM BLOWER (G) BROWN PSW G 5 S18 RTN NOTE: IF
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ELECTRICAL 1. Check all wiring for loose connections. 2. Check for correct voltage at unit (unit operating). 3. Check amperage draw. FLUE AND CHIMNEY Check all vent and vent connector joints for tightness. ensure that connections are sealed and that there are no blockages. FAILURE TO OpERATE If unit fails to operate check the following: 1. Is thermostat calling for heat? 2. Is main disconnect closed? 3. Is there a breaker tripped or a fuse blown? 4. Is gas turned on at meter? 5. Is manual sh
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pARTS LIST: SEE BACK pAgE FOR pARTS ORDERINg INFORMATION REF #. DESCRIpTION 45 ITEM # QUANTITY 75 ITEM # QUANTITY 1.................CIRCUIT BoARD .................................................... 60105 .......................1 ....................................S/A .......................1 2.................lIMIT SeNSoR ....................................................... 60022 ......................1 ....................................60021 ...................2 3.................ele CTR
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Mr. Heater / HeatStar • Compact Unit Heater • Model # MHU45/75 HSU45/75 enerco | Compact Unit Heater operating Instructions and owner’s Manual 17
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MoDel MoDel OpERATINg INSTRUCTIONS AND OwNER’S MANUAL READ INSTRUCTIONS CAREFULLY: Read and MR. HEATER HEATSTAR follow all instructions. Place instructions in a safe place for future reference. Do not allow HSU 45 MHU 45 anyone who has not read these instructions to assemble, light, adjust or operate the heater. HSU 75 MHU 75 wARNINg: USe oNl Y MANUFACTUReR’S RePl ACeMeNT PARTS. USe oF ANY o THeR PARTS CoUlD CAUSe INJURY oR DeATH. RePl ACeMeNT PARTS ARe oNl Y AVAIl ABle DIReCT FRoM THe FAC
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ModèLe ModèLe GUIdE d'UTILISATION ET INSTRUCTIONS dE fONCTIONNEMENT LISEZ SOIGNEUSEMENT LES INSTRUCTIONS. MR. HEATER HEATSTAR Lisez et observez toutes les instructions. Conservez les instructions pour vous y référer ultérieurement. Interdisez à quiconque n'ayant pas lu les présentes HSU 45 MHU 45 instructions d'assembler, d'allumer, de régler ou de faire fonctionner cet appareil de chauffage. HSU 75 MHU 75 AVERTISSEMENT : N'UTILISeZ QUe LeS PIèCeS de ReMPLACeMeNT dU FABRICANT. L'UTILISATIoN
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Mr. Heater / HeatStar • Appareil de chauffage compact • Modèle MHU45/75 HSU45/75 enerco | Appareils de chauffage compacts Guide d’utilisation et instructions de fonctionnement 17
