Advertisement
Quick Links
INSTALLATION AND OPERATING INSTRUCTIONS
FOR AQ-1 POWER VENT KIT
DESIGNED FOR
BOSCH 425 HN WATER HEATERS
AQUASTAR 125B WATER HEATERS
INCLUDING AQUASTAR MODELS: 125HX • 125BS • 125X • 125BL
TABLE OF CONTENTS
contents with an AQ-1 power vent
mounting gas pressure switch
mounting linear spillage switch
common setup
locating vent hood (clearances)
mounting power vent motor (clearances)
troubleshooting and maintenance
safety interlock test
AQ-1 wiring diagram
vent hood template
p.1
p.2
p.4
p.6
p.7
p.7
p.9
p.10
p.11
p.12
8504077 rev. B 10.03
Advertisement
Summary of Contents for AquaStar 125BL
- Page 1 FOR AQ-1 POWER VENT KIT DESIGNED FOR BOSCH 425 HN WATER HEATERS AQUASTAR 125B WATER HEATERS INCLUDING AQUASTAR MODELS: 125HX • 125BS • 125X • 125BL TABLE OF CONTENTS contents with an AQ-1 power vent mounting gas pressure switch mounting linear spillage switch...
- Page 2 AQ-1 Power vent kit Parts included: Spillage Switch Kit 185º F linear spillage switch mounted on an angled bracket and equipped with 36 inch cables connected to one eyelet terminal and one 1/4" quick connect terminal Spillage switch mounting screw Push on male spade connector, replaces eyelet terminal from 36 inch spill switch cable.
- Page 3 When mounting the Gas Pressure Switch: We recommend mounting the gas pressure switch vertically against a wall on the lower left side of the water heater. See Figure E p.6. Because the cabinet cover is three sided we do not recommend screwing the gas pressure switch to the left side of it.
- Page 4 The tube must be long enough to enter the bottom of the water heater front cover and attach to the burner manifold without difficulty (See Figure B). The second tube must be long...
- Page 5 If hot flue gasses spill from the draft hood diverter, the draft spillage sensing switch will open the pilot safety circuit and shut off all gas to the water heater. The switch is normally closed and opens at temperatures greater than 185º...
- Page 6 The ECO is mounted on the lower left outlet water pipe. (See figure C) a. Remove one lead connecting to ECO terminal, it does not matter which one is disconnected. b. Attach 1/4" quick connect terminal end of linear spill switch cable to now exposed terminal of the ECO.
- Page 7 COMMON SETUP 4" single wall pipe* (galvanized or stainless steel) or 4" B-type vent*. * Single wall vent pipe requires a 6" clearance to combustibles. B-type vent (double wall) requires a 1" clearance to combustibles. Use of B-type vent is not permissible downstream outlet side of the fan motor.
- Page 8 NOTE: FOLLOW REQUIREMENTS IN FIGURES F & G ON THIS PAGE BEFORE INSTALLING VENT HOOD, THEN USE TEMPLATE ON PAGE 13 TO CUT HOLE. CAUTION Failure to follow these installation instructions may violate applicable national and/or local codes The vent system must terminate so that proper clearances are maintained as cited in the National Fuel Gas Code, ANSI Z223.1 IGURE...
- Page 9 Install properly sized vent pipe connections from the power venter inlet to the water heater's outlet, avoiding elbows wherever possible. Position the 5" to 4" reducer pipe on top of the water heater first and then connect a 4" 90º...
- Page 10 Combustion Air Test Close all doors and windows of the building. If the water heater is installed in a utility room or closet, close the entrance door to this room. Close fireplace dampers.
- Page 11 SAFETY INTERLOCK TEST Open the gas supply to the water heater. Remove the vent pipe from the vent connec- tor on the top of the water heater. Block the vent connector with sheet metal or other noncombustible material. Turn on the hot water supply to allow the burner to activate.
- Page 12 S A F E TY I N T E R L O C K D I A G R A M LINEAR LIMIT HEATER SPILLAGE SENSING SWITCH BLACK 185º MANUAL RESET...
- Page 13 Attach this template to the interior of the wall the Vent Hood will be penetrating. Insure that proposed vent termination clear- ances are met before cutting opening through wall. Using a 1/2" drill bit, drill two pilot holes where noted on this template. The drill bit must be long enough to penetrate to the building exterior.