Sterling QVSB User Manual

FOR YOUR SAFETYIf you smell gas:1. Open windows.2. Don’t touch electrical switches.3. Extinguish any open fl ame.4. Immediately call your gas supplier

10Figure 9COMBUSTION UNITSEPARATEDPICTORIAL LADDERCOLOR KEYCAUTIONKEY

11Figure 10COMBUSTION UNITSEPARATEDPICTORIAL LADDERCOLOR KEYCAUTIONKEY

12INSTALLATION - VENTINGCOMBUSTION AIR VENTING AND PIPING Never operate unit heaters without combustion air and fl ue gas piping in place or severe p

13INSTALLATION - VENTING (continued)5. Any run of single wall vent pipe passing through an unheated space must be insulated with an insulation s

14Figure 14 - Horizontal Vent Installation Figure 12 - Vertical Vent Installation

15INSTALLATION (continued)BLOWER SET UP The drive ratio of the motor and blower sheaves has been preset at the factory for a temperature rise of 65°F

16OPERATION Never operate the unit beyond the specified limits or severe damage to and/or premature failure of the unit will result!EXPLANATION OF C

17Figure 16 - Burner Components/Unit Controls Intermittent Pilot IgnitionBURNER DRAWER COMMON PARTS: 1. MAIN BURNERS 2. BURNER MANIFOLD 3. AIR S

18 Table 5 - Main Burner Orifi ce Schedule* PRIMARY AIR SHUTTER ADJUSTMENTAfter the unit has been operating for at least 15 minutes, adjust the primar

19MAINTENANCEPERIODIC SERVICENOTICE: The heater and vent system should be checked once a year by a qualifi ed technician.All Maintenance/Service inform

2TABLE OF CONTENTSSPECIFICATIONS Basic Description ...2 Performance & Specifi cation Data ...

20PRESSURE SWITCHBELT GUARDGAS VALVERETAINER SPRING AIR SHUTTERSPILOT ASSY.MANIFOLDFigure 19 - Internal Furnace Assem-bly MAINBURN

21 1. Reset manifold pressure. Refer to “Operation”. 2. Replace regulator section of combin- ation gas valve or complete valve. 3. Check

22 7. Check thermostat and replace if defective. 8. Be sure 115 volts is supplied to the transformer primary, then check for 24 volts

23 1. Check and tighten all wiring connections per diagrams. Thermostat wires tagged “W” and “G” must be connected together (un

24 1. Loose S8600 connections. 2. Improper gas pressure. 3. Is spark in pilot gas stream? 4. No pilot gas — do not use match to test - pr

25Figure 21 - Power Venter AssemblyNOTES: *1) For item No. 6, use counter-clockwise rotation. 2) DO NOT OVERTIGHTEN CELCON NUT! HAND TIGHTEN ONLY

26INSTALLATION INSTRUCTIONS FOR FIELD REPLACEMENT OF POWER VENTER MOTORTOOLS AND PARTS NEEDED:Wire Stripper and Crimper; Slotted Head and #2 Phillips

27HOW TO ORDER REPLACEMENT PARTSPlease send the following information to your local representative; If further assistance is needed, contact the manuf

28Customer ____________________________________ Job Name & Number _________________________PRE-INSPECTION INFORMATIONWith power and gas off.Typ

29Digit #1, 2 - Unit Type [UT] Digit #13 - Motor Type [MT]B3 - Separated Combustion Blower 1 - Open Drip Proof 2 - Totally EnclosedDigit #3, 4, 5 - Ca

3 Failure to comply with the general safety information may result in extensive property damage, severe personal injury or death. This product must be

30NOTES:

31NOTES:

32NOTES:260 North Elm Street - Westfield, MA 01085Tel: (413) 568-9571 Fax: (413) 562-8437www.mestek.com

4Table 1 – Performance and Specifi cation Data – Separated Combustion Blower Unit HeaterUnit Size 100 125 150 175 200 225 250 300 350 400 PERFORMAN

5INSTALLATION Do not install unit heaters in corrosive or fl ammable atmospheres! Premature failure of, or severe damage to the unit will result! Avoi

6INSTALLATION (continued)Figure 4 - Heat Throw DistancesUnit heaters should not be installed to maintain low temperatures and/or freeze protection of

7 Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters per Hour) for Gas Pressures of 0.5 psig (3.5 kPa) or Less, and a Pressure Dr

8 Check all pipe joints for leakage using a soap solution or other approved method. Never use an open fl ame or severe personal injury or death may

92. Hot areas - Areas where the sun's rays, radiation, or warm air currents may affect control operation.3. Dead areas - Areas where air can