MC Series Gas-Fired Circulating Heater - Heat Transfer Products, Inc

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28 PART 6 – PIPING WITH OPTIONAL VISION 1 SYSTEM (DHW PRIORITY WITH OUTDOOR RESET) A. VISION 1 SYSTEM PIPING It is important that the system piping is done correctly when using the Vision 1 System. Follow the piping diagrams 2A through 3G when piping your heater. All general piping practices should still be maintained. B. ZONING WITH ZONE VALVES USING VISION 1 1. Connect the heater to the system as shown in piping details 2A through 2C. 2. Connect the DHW circulator (P2) directly to the heater as shown in the piping details. The heater circulator (P1) will shut down when there is a DHW demand. C. ZONING WITH CIRCULATORS USING VISION 1 1. Connect the heater to the system as shown in piping details 3A through 3G. 2. Connect the DHW circulator (P2) directly to the heater as shown in the piping details. The heater circulator (P1) will shut down when there is a DHW demand. LP-171 Rev. 10.2.13
29 D. PIPING DETAILS WITH THE VISION 1 SYSTEM Figure 12 NOTES: 1. This drawing is meant to demonstrate system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4. The minimum pipe size for connecting an indirect water heater is 1”. 5. The minimum pipe size for connecting the unit is 1.25”. 6. Circulators are shown with isolation flanges. The alternative is standard flanges with full port ball valves. Purge valves can be used with the circulator flanges as an alternative. 7. Optional Vision 1 system includes temperature sensors for DHW and outdoor air and must be purchased separately. 8. The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119 o F. 9. Install a minimum of 12 diameters of straight pipe upstream of all circulators. 10. Winterization: When winterizing the unit, put a drain valve on both the supply and return between the union and the shut-off connection. LP-171 Rev. 10.2.13
Page 1 and 2: MC Series Gas-Fired Circulating Hea
Page 3 and 4: 3 The following defined terms are u
Page 5 and 6: 5 F. CIRCULATORS...................
Page 7 and 8: 7 DO NOT USE THIS HEATER IF ANY PAR
Page 9 and 10: Modulating Combustion System Modula
Page 11 and 12: 11 Failure to keep heater area clea
Page 13 and 14: 13 E. EXHAUST VENT AND INTAKE PIPE
Page 15 and 16: The building frame (studs) must be
Page 17 and 18: 17 C. SEPARATE LOW WATER CUTOFF A l
Page 19 and 20: 19 The chart below represents vario
Page 21 and 22: 21 M. PIPING DETAILS Figure 5 LP-17
Page 23 and 24: 23 Figure 7 NOTES: 1. This drawing
Page 27: 27 Figure 11 NOTES: 1. This drawing
Page 39 and 40: 39 PART 7 - VENTING, COMBUSTION AIR
Page 41 and 42: 41 D. EXHAUST VENT AND INTAKE PIPE
Page 43 and 44: 43 Figure 23 - LP-171-R NOTES: 1. C
Page 45 and 46: 45 2. Inspect the area where the wh
Page 47 and 48: 47 I. DIAGRAMS FOR SIDEWALL VENTING
Page 49 and 50: 49 *NOTE: Installer must supply tra
Page 51 and 52: The gas piping must be sized for th
Page 53 and 54: 53 Figure 29 LP-171 Rev. 10.2.13
Page 55 and 56: Connection Specification - Wire 22
Page 57 and 58: 57 B. FREEZE PROTECTION (WHEN USED)
Page 59 and 60: 59 Never open the manual air vent w
Page 61 and 62: 61 To adjust, press either {S1} (De
Page 63 and 64: 63 18 1 Step Modulation - Regulates
Page 65 and 66: 65 926 CONTROL BOARD ERROR CODES CO
Page 67 and 68: 67 PART 15 - MAINTENANCE A. MAINTEN
Page 69 and 70: 69 Check combustion air inlet pi
Page 71 and 72: 71 Figure 33 LP-171 Rev. 10.2.13
Page 73 and 74: 73 HEATER START-UP REPORT LIGHT OFF
Page 75 and 76: 75 LP-171 Rev. 10.2.13
Page 77 and 78: 77 MAINTENANCE NOTES LP-171 Rev. 10

MC Series Gas-Fired Circulating Heater - Heat Transfer Products, Inc

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