Bradford White UCG100H199 Installation & Operation Manual page 36

Maintenance Schedule
Following are the instructions for performing some of the recommended maintenance. Unit inspection and
adjustment should only be performed by a qualified technician.
Service Interval
1 Month:
1 Year:
Flushing the Water Heater
1. Turn OFF the water heater electrical disconnect switch.
2. Open the drain valve and allow water to flow until it runs clean.
3. Close the drain valve when finished flushing.
4. Turn ON the water heater electrical disconnect switch.
Filling the Water Heater
1. Close the water heater drain valve. This
water heater utilizes a ball valve; when
closing the valve, the stem will spin
indefinitely. Confirm it is closed by ensuring
the slot on the stem is perpendicular to the
valve body. If alternative water connections
are provided but not used, make certain
they are plugged (i.e. space heating &
alternate top connections).
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is filled. Close the faucets and
check for water leaks at the water heater drain valve, combination temperature and pressure relief
valve, and the hot and cold water connections.
Draining the Water Heater
The water heater must be drained if it is to be shut down and exposed to freezing temperatures. Some
maintenance and service procedures may also require draining the water heater.
1. Turn OFF the water heater electrical disconnect switch.
2. Connect a hose to the drain valve.
3. Locate the hose discharge in an area where hot water will not cause any damage or injury.
4. Close the cold water inlet valve to water heater.
5. Open a nearby hot water faucet to vent the system.
6. Open the heater drain valve.
7. If the water heater is being drained for an extended shutdown, it is suggested the drain valve be left
open during this period.
Drain Valve and Tank Access Panel
The water heaters are equipped with a ¾ inch drain valve.
An access panel covers the cleanout opening in the tank, which is sealed by a gasket and cover.
Table 7 – Suggested Maintenance Schedule
Component
Tank
Condensate Line
Powered Anode
System
Relief Valve
Vent & Air Intake
System
Vent Terminals
Combustion System
Operation
Sediment removal
Inspect & clean
Check LED/inspect
rods
Function test
Inspect
Free of blockage &
debris
Inspect & clean Clean flame sensor, igniter, & inspect burner.
36
Action
Drain off several gallons of water.
Clear drainline and trap, verify proper pitch.
1st year: check rods to determine service
interval; check LED annually.
Operate lever, inspect for blockage or
corrosion.
Inspect joint seals/vent supports; clean air
filter accessory kit if used.
Clear intake and exhaust terminals, clean
terminal screens.