Bradford-White Corp BRHHH Replacement Parts, Short Cycling Water Heater, High Gas Consumption

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8.5Short Cycling — Water Heater

Short cycling will generally occur only in

combination space heating and water heating applications when the water heater is operating in the space-heating mode. Because the Brute Magnum is a modulating water heater and its input will reduce when there is a reduction in heating load, short cycling is greatly reduced. If the heating load drops below the minimum input of the water heater for an extended period, the water heater will have a tendency to short cycle. If short cycling is frequently experienced, regardless of the control’s attempt to limit it, the heating load should be redistributed to control it. See Section 5.5 regarding controller setup.

If short cycling occurs in a water heater application, it is probably caused by undersized piping between the water heater and the storage tank or by some other factor that restricts proper water flow through the water heater. The cause should be determined and corrected.

8.6High Gas Consumption

Appliances operating with an improper air/

fuel ratio are very inefficient and consequently, have very high gas consumption. Because efficiency is high when the CO2 is high (or O2 is low), appliances operating with low CO2 or high O2 (especially LP appliances) consume more gas. Adjust the CO2 or O2 for optimum efficiency. If no combustion analyzing equipment (CO2 or O2) is available then a proper adjustment of the air/fuel ratio (CO2 or O2) can not be accomplished. However, by briefly sniffing the flue gases it is possible to determine if the CO2 or O2 is within the proper range. No significant flue gas odor should be detected when combustion is proper. A strong piercing smell indicates poor combustion and generally a lean mixture - low CO2 or high O2 . The CO2 should be 8 to 9% at all firing rates. Do not attempt to correct combustion. Contact factory if the CO2 is not within this range.

Section 9

REPLACEMENT PARTS

Only genuine Bradford White replacement parts should be used.

9.1General Information

To order or purchase parts for the Brute

Magnum, contact your nearest Bradford White dealer or distributor. If they cannot supply you with what you need, contact Customer Service (see back cover for information).