41
Installation & Operation Manual
6
Start-up
Filling hot water heater
1. Close the system’s drain valve by turning the handle
clockwise.
2. Open a nearby hot water faucet to permit the air to
escape.
3. Fully open the cold water inlet pipe valve allowing the
water heater and piping to be filled.
4. Close the hot water faucet as water starts to flow.
5. The water heater is ready to be operated.
Check for gas leaks
Before starting the unit, and during initial
operation, smell near the floor and around
the unit for gas odorant or any unusual odor.
Remove the front access panel and smell
the interior of the water heater enclosure.
Do not proceed with startup if there is any
indication of a gas leak. Use an approved
leak detection solution. Repair any leaks at
once.
WARNING
Propane water heaters only – Your propane
supplier mixes an odorant with the propane
to make its presence detectable. In some
instances, the odorant can fade, and the gas
may no longer have an odor. Before startup
(and periodically thereafter), have the
propane supplier verify the correct odorant
level in the gas.
WARNING
Check vent and air piping
Inspect vent piping and air piping for signs of deterioration
from corrosion, physical damage or sagging. Verify air piping
and vent piping are intact and correctly installed per this
manual.
Placing the unit in operation
Water heater operational checks
1. Turn the water heater main power switch to the “ON”
position.
2. Verify operation of the electronic controller.
3. Program the electronic controller to desired settings.
4. Push the reset for the low water cutoff (if equipped).
5. Ensure that maximum flow to the unit does not exceed
55 GPM on Models 400 - 750 and 90 GPM on Models
1000 - 2100. Verify by checking temperature rise while
burner is firing at 100% of rated input.
6. Install a manometer on the gas supply to the water heater and
verify minimum gas supply pressure as the burner fires at
100% of rated input.
7. Verify operation of safeties as necessary (low water
cutoff, high limit, gas pressure, etc.,).
8. Verify that all adjustable points in the electronic controller
are set as required.
9. Once the unit analysis is complete, test the safety shutoff
device by turning the manual shutoff valve to the OFF
position and ensuring that the unit shuts down and
registers an alarm. Open the manual shutoff valve and reset
the
control.
10. Place the water heater back into normal operation.
Water heater operation
11. Water heater should begin the start-up process for the
sequence of operation.
12. The unit will ignite at the proper ignition speed and
will stage to meet the system demand.
13. Ensure that inlet water temperature does not fall below
the specified minimum for the unit.
14. Based on tank demand, water heaters may run for an
extended period of time at a reduced rate of input to
maximize
efficiency.
15. As tank demand is satisfied, the burner will cycle off
and the combustion air blower will run for a post
purge operation before the unit shuts down.
Check thermostat circuit(s)
1. Disconnect the two external wires connected to the enable
terminals on the connection board.
2. Connect a voltmeter across these two incoming wires.
Close each thermostat and relay in the external circuit
one at a time and check the voltmeter reading across the
incoming wires.
3. There should NEVER be a voltage reading.
4. If a voltage does occur under any condition, check and
correct the external wiring.
5. Once the external thermostat circuit wiring is checked and
corrected if necessary, reconnect the external thermostat
circuit wires to the connection board. Allow the unit to
cycle.
