Showing posts with label AQ4 powervent kit. Show all posts
Showing posts with label AQ4 powervent kit. Show all posts
Monday, October 7, 2013
Discrepancy in Dimensions for Bosch Therm 520HN & 520PN
There was recently a discrepancy found in the dimensions (HxDxW) for the Bosch Therm 520 series gas tankless water heaters in the product selection guide. The discrepancy has been corrected. Please always follow the instructions in the installation manual for a safe and proper installation of the gas tankless water heater. The dimensions in the installation manual for the Bosch Therm 520 series heaters is correct and is: H 25.75 x D 8.66 x W 16.73.
Wednesday, April 3, 2013
Bosch Therm 520HN NG & LP Tankless Water Heater
The new Bosch Therm 520HN comes set for either NG (Natural Gas) or LP (Liquid Propane). The 520HN has a hydro ignition and is a naturally drafting heater and requires no power to operate. This unit is basically for 1 major application at a time such as 1 shower at a time. The Bosch 520 HN Needs to be vented vertically with a 5" B-vent up through the roof for a minimum of 6' to the raincap. If the heater has to be vented out the sidewall then you must use the AQ4 Powervent kit and this kit would require 110V power. The gas connection at the bottom of the heater is a standard 3/4" connection.
The new Bosch Therm 520HN is a direct replacement for many of the older model heaters. Below is a list of the units that the 520HN would replace. Please keep in mind to always be aware of gas line sizing and the length of the gas line run.
The Bosch Therm 520HN could replace:
Bosch 1600P or 1600H: (If either one of these units was vented horizontally out the sidewall with the AQ4 powervent kit then that same AQ4 powervent kit can be used for the new Bosch Therm 520HN)
Bosch Aquastar 125B, 125X, 125HX, 425PN or the 425HN: (If any of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520HN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520HN)
ELM Le Blanc 170VP or 125VP: (If either one of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520HN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520HN)
The Bosch Therm 520HN is a direct replacement for the older tankless water heaters listed above but you still always want to make sure and refer to the installation manual and follow the gas line sizing chart and venting requirements. Please also refer to local code for all other restrictions and approvals.
Bosch Therm 520PN NG & LP Tankless Water Heater
The new Bosch Therm 520PN comes set for either NG (Natural Gas) or LP (Liquid Propane). The 520PN has a standing pilot and is a naturally drafting heater and requires no power to operate. This unit is basically for 1 major application at a time such as 1 shower at a time. The Bosch 520 PN Needs to be vented vertically with a 5" B-vent up through the roof for a minimum of 6' to the raincap. If the heater has to be vented out the sidewall then you must use the AQ4 Powervent kit and this kit would require 110V power. The gas connection at the bottom of the heater is a standard 3/4" connection.
The new Bosch Therm 520PN is a direct replacement for many of the older model heaters. Below is a list of the units that the 520PN would replace. Please keep in mind to always be aware of gas line sizing and the length of the gas line run.
The Bosch Therm 520PN could replace:
Bosch 1600P or 1600H: (If either one of these units was vented horizontally out the sidewall with the AQ4 powervent kit then that same AQ4 powervent kit can be used for the new Bosch Therm 520PN)
Bosch Aquastar 125B, 125X, 125HX, 425PN or the 425HN: (If any of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520PN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520PN)
ELM Le Blanc 170VP or 125VP: (If either one of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520PN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520PN)
The Bosch Therm 520PN is a direct replacement for the older tankless water heaters listed above but you still always want to make sure and refer to the installation manual and follow the gas line sizing chart and venting requirements. Please also refer to local code for all other restrictions and approvals.
The new Bosch Therm 520PN is a direct replacement for many of the older model heaters. Below is a list of the units that the 520PN would replace. Please keep in mind to always be aware of gas line sizing and the length of the gas line run.
The Bosch Therm 520PN could replace:
Bosch 1600P or 1600H: (If either one of these units was vented horizontally out the sidewall with the AQ4 powervent kit then that same AQ4 powervent kit can be used for the new Bosch Therm 520PN)
Bosch Aquastar 125B, 125X, 125HX, 425PN or the 425HN: (If any of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520PN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520PN)
ELM Le Blanc 170VP or 125VP: (If either one of these units was vented horizontally out the sidewall with the AQ1 powervent kit then that AQ1 powervent kit WILL NOT work for the new Bosch Therm 520PN. You would need to install the new AQ4 powervent kit for the new Bosch Therm 520PN)
The Bosch Therm 520PN is a direct replacement for the older tankless water heaters listed above but you still always want to make sure and refer to the installation manual and follow the gas line sizing chart and venting requirements. Please also refer to local code for all other restrictions and approvals.
Friday, January 25, 2013
Venting requirement for Bosch AQ4 Powervent kit
The Bosch AQ4 Powervent Kit with built-in freeze protection is designed for the Bosch Therm 520HN (Hydro Ignition) and 520PN (Pilot) tankless water heaters. This accessory allows the Bosch 520HN and 520PN tankless heaters to vent horizontally out the sidewall of the home. The AQ4 does require power to operate and operates on 120V and comes with a 3' cord to plug into the outlet.
The AQ4 is a power vent kit and will allow a horizontal vent run of up to 25 feet with one elbow (subtract 5 feet for every elbow). This kit includes the power vent motor. There is also a vent hood with damper that gets mounted on the outside of the home and this built in flapper prevents the cold air from coming in when the heater is not in use. Please make sure to refer to the installation manual and that the hood is properly installed so that the flapper stays closed all the way when not in use.
The AQ4 powervent kit comes with a 5" to 4" reducer. This reducer fits right on top of the heater and then you would use 4" type B, C or stainless steel AL29-4C venting (not included) to go to the powervent motor. There is a minimum of 2 feet of straight pipe required between the reducer and the blower motor. Any venting (if needed) "after" the powervent motor must be 4" sealed stainless steel AL29-4C. The Blower motor should be placed right at the opening where the termination hood with damper is to be installed on the sidewall of the home.
The AQ4 powervent kit is activated by a flow switch and gets attached to the cold water pipe on the right side of the unit just before it goes into the heat exchanger.
The blower motor for the AQ4 has a new design and includes a delay setting that goes from #1 - #5 and this lets the installer set the blower motor so that when it senses flow it can be delayed for 1 - 5 seconds before the blower comes on. This will help to ensure the pilot and burners light without getting sucked out by the blower motor.
There is also a built in safety spill switch that gets attached to the tankless water heater and this will detect high temperatures from any flue gases in the case the blower motor does not activate and will shut the unit completely down.
The AQ4 powervent kit comes with a 5" to 4" reducer. This reducer fits right on top of the heater and then you would use 4" type B, C or stainless steel AL29-4C venting (not included) to go to the powervent motor. There is a minimum of 2 feet of straight pipe required between the reducer and the blower motor. Any venting (if needed) "after" the powervent motor must be 4" sealed stainless steel AL29-4C. The Blower motor should be placed right at the opening where the termination hood with damper is to be installed on the sidewall of the home.
The AQ4 powervent kit is activated by a flow switch and gets attached to the cold water pipe on the right side of the unit just before it goes into the heat exchanger.
The blower motor for the AQ4 has a new design and includes a delay setting that goes from #1 - #5 and this lets the installer set the blower motor so that when it senses flow it can be delayed for 1 - 5 seconds before the blower comes on. This will help to ensure the pilot and burners light without getting sucked out by the blower motor.
There is also a built in safety spill switch that gets attached to the tankless water heater and this will detect high temperatures from any flue gases in the case the blower motor does not activate and will shut the unit completely down.
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