Service manual

SC Series Boilers – Installation and Service Manual

Startup Instructions Section 3

3.1 PRE-STARTUP

a. Fill entire heating system with water and vent or purge air from system. Add water as needed to

reach boiler operating pressure. Water should be of suitable quality. Do not use water with high

hardness.

b. Check that the venting condensate drain trap is filled with water.

c. Check that the tubes tightly and correctly connect the air pressure switches with air chamber.

d. Check for and repair any leaks in water piping.

e. Check for proper installation of pressure relief valve and venting.

f. Check that the electrical wiring matches the wiring diagram in this manual or on the boiler.

g. Use a soap solution to check for leaks in gas piping from meter to gas manifold. Repair and retest

any leaks found.

h. Operate circulating pump and vent all radiation units and high points in system piping.

3.2 STARTUP

WARNING

The following instructions are intended as a guide for qualified persons. Before lighting the

boiler, the pre-startup instructions of Section 3.1 MUST be performed. If you do not follow these

instructions exactly, a fire or explosion may result causing property damage, personal injury or

loss of life.

WARNING

Should boiler overheat, or the gas supply fail to shut off, do not turn off or disconnect the

electrical supply to the boiler or circulating pump. Instead, shut off the gas supply at a location

external to the boiler.

a. Direct Spark Ignition Or Hot Surface Ignition

This boiler does not have a pilot flame. It is equipped with a direct ignition device which automatically

lights the main burner. Do not try to light the main burner by hand.

In the event of failure of any component, either the system will not operate or it will go into safety lockout.

1) Make sure the Gas Valve and all electrical power to the boiler are "OFF".

2) Set room thermostat to the lowest setting.

3) Connect a manometer at pressure tapping on downstream section of gas valve.

4) Wait five minutes to clear out any gas. If you smell gas, STOP! Follow the safety instructions

provided in Section 1.1 under WHAT TO DO IF YOU SMELL GAS. Remember that propane does

not vent upward naturally.

5) Check the ignition control as follows:

a) Set room thermostat above room temperature to call for heat and turn power on for the boiler.

b) Watch/listen for spark or watch for hot surface to glow bright in the combustion chamber from

the inspection hole in the front of boiler after 30 seconds pre-purge. If no flame is detected

within 4 seconds, two or three retries will automatically occur after a 30 second inter-purge. If

no flame is detected after three or four tries for ignition, all models will automatically lockout

and restart the ignition sequence after one hour, or after the power is reset. However, if the

lockout is caused by a blockage of the heat exchanger, venting or air inlet pipe, the controller