77
11.5
WATER CONNECTIONS
All models have groove locked inlet and outlet stainless steel connections. Pipe size must be in accordance with Table 3 and, between
supply and return lines, must not exceed 80 feet of equivalent length. Any reduction in recommended pipe size may decrease flow
resulting in high water temperatures, boiler noise, flashing to steam and non-warrantable heat exchanger damage.
11.6
PIPING LENGTHS
The appliance circulator provides the water flow from the system piping, through the boiler and back to the system. Pipe diameter and
length are critical to ensure proper flow through the boiler.
The secondary loop piping to and from the appliance must have a fully ported ball valve installed in both the inlet and outlet side piping
and will be used for isolation only.
The ball valves must be the same diameter as the installed piping
. If flow control is required, other
means of flow control such as globe valve or flow setter should be used.
11.7
INTERMITTENT PUMP OPERATION
An intermittent pump operation signal is standard and can be used to operate a separate pump contactor. A 1/6 hp pump delay relay is
standard, and a 1 hp pump delay relay is available.
When utilizing this feature, the boiler’s integral circulating pump will cycle on each
call for heat, before the burner fires. The pump will continue to operate while the burner is firing. The pump will run for a post-pump
period after the temperature set point is satisfied. This will remove any residual heat from the combustion chamber before turning the
pump off. See wiring diagram shipped with the unit.
11.8
SUMMARY
a) Typical Boiler Installations
General Plumbing Rules
1. Check all local codes.
2. For serviceability of boiler, always install unions.
3. Always pipe pressure relief valve to an open drain.
4. Locate system air vents at highest point of system.
5. Expansion tank must be installed near the boiler and on the suction side of the system pump.
6. Support all water piping.
b) Placing the Boiler in Operation
Pre-Start Check List
1. Review the location of the boiler, clearances from combustible surfaces and available service clearances.
2. Review Part 2 Venting and Air Supply. Ensure that all vent components are fabricated from the correct category of materials
with adequate clearance from combustibles.
3. Ensure that the boiler condensate drain and all vent system condensate drains are properly routed to an acceptable floor drain
or neutralization system.
4. Review the vent termination point for proper location and clearances.
5. Ensure that proper volumes of combustion and ventilation air are provided to the mechanical room. If a separate combustion
air pipe is used, ensure that it is properly sized, sealed and terminated.
6. Review the water piping from the boiler to the system. The boiler must be installed in a primary/ secondary piping system.
Review the diameter and equivalent length of the installed piping to and from the boiler for proper flow.
7. Ensure that a properly sized primary system pump is installed with an expansion tank.
8. Check system pressure. Ensure a minimum of 30 PSIG with the system hot and not more than 90% of the rated pressure of
the relief valve.
9. Review the installed gas piping from the meter to the boiler. Ensure that the gas pipe, meter and any regulators are adequately
sized.
10. Review the field wiring and electrical service for both the boiler controls and pump. Ensure that the electrical service(s) is
adequately sized.
Boiler Set-Up
1. Ensure that the boiler and piping system are full of water. Bleed all air from the pump housing and secondary loop.
2. Check system for any water leaks.
3. Check system for installation of glycol or water treatment where required. Where glycol has been used to maintain the
temperature rise across the appliance confirm that the recommended flow for pure water has been increased by 15% and the
head loss by 20%.
4. Turn on power to the primary system pump and the appliance secondary pump and verify operation.
Summary of Contents for ADVANTUS AVH 500
Page 2: ......
Page 3: ......
Page 38: ...31 Figure 23 Recommended Piping with Reverse Return and Variable Primary Flow...
Page 88: ...81 PART 12 EXPLODED VIEW Figure A...
Page 89: ...82 Figure B FAN BURNER ASSEMBLY AV500 600 some items may not be as shown...
Page 90: ...83 Figure C FAN BURNER ASSEMBLY AV800 4000 some items may not be as shown...
Page 91: ...84 Figure D Figure E...
Page 92: ...85 Figure F Figure G...
Page 93: ...86 Figure H CONTROL BOARD ASSEMBLY...
Page 100: ...93 PART 13 ELECTRICAL DIAGRAMS...
Page 101: ...94...
Page 102: ...95...
