This well engineered, gas water heater has all the fea- tures a water heater should have:
It operates on the principle of heating water instantaneously “on demand”. When a hot water faucet is opened, cold water flows through the coils of the heat exchanger in the Aquastar. This same flow opens the gas valve, and the burners are ignited by the pilot flame. The heat exchanger coils absorb the heat generated by the burners and transfer heat to the water. When the hot water faucet is shut off, the gas valve automatically closes and the burners turn off. Your hot wa- ter faucet is an ignition key to turn on the water heater, giving you control over your hot water energy use. Each time you turn off your hot water faucet, you also shut off the water heater.
FEATURES
-High Quality Materials for Long Working Life.
-Copper heating coils for endless supply of hot water.
-Safety thermocouple at pilot burner.
-Automatic overheating protection
-Stainless steel burners with stabilized blue flame.
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-Compact space saver: mounts on a wall with two hooks.
-Easily removable
-Easy one person installation.
-Adjustable water flow restrictor to ensure that water flow demand will not exceed the heating capacity of the heater.
-Easy pilot flame lighting with push button piezo ignition.
AquaStar 38B LP and 38B NG Specifications
Gas Input max.: 40,000 Btu/hr min.: 20,000 Btu/hr
Water Connection 1/2” Thread fitting NPT
H x W x D 25 3/8” x 10 5/8” x 9 1/8"
Vent 4”
Gas Connection 1/2” NPT thread
Min. Water Pressure 13 Psi at 1.3 GPM
Max. Water Pressure 150 Psi
Shipping Weight 20 LB
Net Weight 18 LB
0.5GPM at 90° rise
1.3GPM at 45° rise
Min. Water Flow 1/2 gal/min
LP GAS Supply Pressure
(before Aquastar regulator) min.: 11” W.C. max.: 14” W.C.*
Required LP GAS Pressure at inlet tap while
Aquastar is operating: | 10.5” W.C. |
LP GAS Burner Manifold pressure while Aquastar is
operating at maximum input: | 9.0” W.C. |
Natural Gas Supply Pressure
(before Aquastar regulator) min.: 7” W.C. max.: 14” W.C.*
BOSCH is constantly improving our products, therefore specifications are subject to change without prior notice.
Required Natural Gas Pressure at inlet tap
while Aquastar is operating: 5.7” W.C.
Natural Gas Burner Manifold pressure while Aquastar is
operating at maximum input: | 3.3” W.C. |
*Inlet gas pressure before Aquastar regulator must not exceed this value. Pressure may need to be adjusted for high altitudes, see page 10.
UNPACKING THE AQUASTAR HEATER
This heater is packed securely. The box includes two water connection fittings, a gas pressure regulator, a gas supply elbow with gasket, a gas shut off valve, a pressure relief valve, two hooks for hanging the heater, this manual, a warranty statement and a warranty registration card. Do not lose this manual, as there is a charge for replacement. Please complete and return the enclosed warranty registration card.
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