Installation / Operation Instruction Manual

23
Operating Instructions continued-
SYSTEM START-UP
Follow boiler installation instructions to place boiler in operation.
SEQUENCE OF OPERATIONS
1. Aquastat senses stored water temperature below desired setpoint.
a. Domestic hot water priority only: Normally closed contacts
open to interrupt space heating.
b. Normally open contact closes, energizing the domestic hot
water circulator.
2. Aquastat senses stored water temperature at desired setpoint.
a. Aquastat contacts open, turning off domestic hot water
circulator and de-energizing relay.
b. Normally open contacts open, stopping boiler operation.
c. Domestic hot water priority only: Normally closed contacts
close, returning boiler control to space heating.
WATER TEMPERATURE ADJUSTMENT
WARNING
This water heater can deliver scalding temperature water at any
faucet in the system. Be careful whenever using hot water to avoid
scalding injury. By setting the thermostat on this water heater to
obtain an increased water temperature, you may create the potential
for scald injury. To protect against injury, you should install an ASSE
approved mixing valve (a device to limit the temperature of water to
protect against scald injury via mixing hot and cold water supply) in
the water system. This valve will reduce point of discharge
temperature in branch supply lines. Such valves are available from
the manufacturer of this water heater or a local plumbing supplier.
Please consult with a plumbing professional.