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Part number 550-100-325/0419
77
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
32 Startup (continued)
Figure 102
X100 inhibitor is required
1. It is required that the boiler have Sentinel X100 inhibi-
tor added to the system to prevent damage to the boilers’
heat exchanger. Failure to comply may result in accelerated
corrosion of the heat exchanger and system components.
See Replacement Parts section at the end of this manual for
ordering information.
2. After filling the system as directed in this manual, and the air
purge has been completed, release the system water pressure
to 0 psi. Drain a small amount of water out of a convenient
boiler drain to insure the system water pressure is at 0 psi.
Use a (field supplied-if needed) Dishwasher elbow / hose 3/4
to 3/8 compression adapter (See Figure 102 below) to the
white Sentinel hose, and screw it to the tube of Sentinel X100.
Insert it into your caulk gun, and fit the washing machine
hose adapter to a boiler drain connection. Open the drain,
and inject the complete tube of X100 to the system. Close the
drain valve, and remove the injection fitting.
3. Fill system water to required pressure, and start a heating
zone to circulate system water. Allow time for the water to
circulate and mix. Then check the inhibitor level with a test
kit. Add additional inhibitor if necessary.
Check/verify water chemistry
1. The system may have residual substances that could affect
water chemistry.
2. After the system has been filled and leak tested, verify water
pH and chloride concentrations are acceptable.
3. Verify antifreeze concentration, if used.
4. Follow the instructions on the Sentinel test kit to sample the
system water and verify inhibitor concentration.
Check inhibitor concentration
annually
1. Test the pH of a sample of system water at least annually.
The pH of the water mixture must be between 7.0 and 8.5.
(Or use the Sentinel inhibitor test kit to check concentra-
tion.)
2. If pH is outside this range (or inhibitor test kit indicates
low level), the inhibitor level may not be sufficient to pre-
vent corrosion.
3. Test antifreeze concentration.
Test antifreeze concentration at least annually.
If concentration is low, add antifreeze or drain
system and refill with correct mixture.
4. Follow instructions on antifreeze container to determine
the amount of antifreeze needed. exceed 50% by
volume concentration of antifreeze.
Check inhibitor level after adjustments are made.
Check thermostat circuits
1. Disconnect wires connected to the thermostat terminals
(see Field wiring, beginning on page 52 for low voltage
terminal locations and application information). Mark
the wires before removing to avoid wiring errors when
re-connecting them.
2. Connect a voltmeter across each pair of incoming wires.
Close each thermostat, zone valve and relay in the external
circuits one at a time and check the voltmeter reading across
the incoming wires.
3.
4. If a voltage does occur under any condition, check and
correct the external wiring.
to 3-wire zone valves
. This could cause con-
trol damage.
5. Once the external thermostat circuit wiring is checked and
corrected if necessary, reconnect the external thermostat
circuit wires.
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