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Copper Brute B4 Volume Water Heaters
The following tools are required for proper
service and problem diagnosis of the heater and
heating system.
1.
Gas pressure test kit with range from 0 to 14
inches (0 to 356 mm) W.C.
2.
Electric meter(s) with the following ranges:
a. 0 to 500 volts VAC
b. 0 to 2000 ohms ()
c. 0 to 20 microamps (mA)
d. 0 to 50 millivolts (mV)
3.
A pressure gauge and a thermometer with proper
ranges for heater operation.
5.2.1 Heater Does Not Come On
Important: Disconnect power to the heater
or pull the RED wire off the transformer secondary
before removing or replacing any component or wire
connection.
If power is not disconnected, jumpering gas valve
or accidental grounding of the wire harness, or
component terminals to the heater frame or jacket
could cause the ignition control fuse to blow or
may cause the heater to fire, resulting in injury or
property damage.
1.
Make sure the heater has been properly installed.
2.
Make sure the pump is not airlocked, clogged or
otherwise inoperative.
3.
Make sure the gas valve is on and there is gas
pressure in the line.
4.
Check all electrical connections and wiring.
Finding a loose connection or a charred wire can
save a lot of time and money.
5.
Check the fuse inside the black, twist-lock fuse
holder. If it is burned, replace it with a 2-amp
fuse (Part No. E0084400). If there is a short, the
cause of the short must be found and repaired.
Do not jumper or bypass the fuse.
6.
Make sure the electrical circuit to the heater is
on.
7.
Make sure the toggle switch on the right side of
the heater is on.
8.
Make sure the temperature control is set high
enough to call for heat.
9.
Make sure the manual reset on the safety controls
(e.g., low water cutoff, hi-limit switch, etc.) has
not tripped. If it has, reset it.
WARNING
If the pump is circulating water, and the rest of
these items check out all right, the trouble could be in
the heater control system.
Caution
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
5.2.2 Testing the Transformer
NOTE: Keep the pump running.
Testing the transformer requires an AC voltmeter
with a 50 volt (V) range. Test the transformer using the
following procedures:
1.
Clip a lead from the voltmeter to the yellow wire
terminal on the transformer.
2.
Touch the other lead to the red wire terminal
(see Figure 37). The voltmeter should read 24 to
28VAC.
3.
If the voltmeter does not show voltage, check the
electrical power supply.
4.
If the voltage is less than 20VAC, the electrical
circuit to the heater may be supplying less than
103VAC. This could be due to high pump load or
air conditioners or other appliances on the circuit.
Figure 37. Testing the transformer.
Page 27
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