Lochinvar 45 Intermittent Pilot Spark Ignition System, Freeze Protection, Water Treatment

6Start-up

Intermittent Pilot Spark Ignition System

WARNING The ignition module is not repairable. Any modification or repairs will invalidate

the warranty and may create hazardous conditions that result in property damage, personal injury, fire, explosion and/or toxic gases. A faulty ignition module must be replaced with a new module.

Ignition and Control Timings

M9 Intermittent Spark Ignition Pilot Models Pilot Trial for Ignition Period - 90 Seconds

Pilot Failure Response Time - 0.8 Seconds at less than 1.0 µA flame current

Pump Delay Timing (Optional on Boilers) - 30 Seconds after burner shutdown

Freeze Protection

1.For boilers with the pump delay option, if either the inlet sensor or the optional multi-purpose temperature sensor reads below 40°F, the pump relay will turn ON. When the temperature rises above 50°F the pump relay will turn OFF.

2.Location - Heating boilers must be located in a room having a temperature safely above freezing [32°F(0°C)].

3.Caution - A room where the appliance is installed and operating under a negative pressure may experience a downdraft in the flue of an appliance which is not firing. The cold outside air pulled down the flue may freeze a heat exchanger. This condition must be corrected to provide adequate freeze protection.

4.Freeze protection for a heating boiler or hot water supply boiler using an indirect coil can be provided by using hydronic system antifreeze. Follow the manufacturers instructions. DO NOT use undiluted or automotive type antifreeze.

5.A snow screen should be installed to prevent snow and ice accumulation around the appliance venting system in cold climates.

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Installation & Service Manual

6.Shut-down and Draining - If for any reason, the appliance is to be shut off, the following precautionary measures must be taken:

(a)Shut off gas supply.

(b)Shut off water supply.

(c)Shut off electrical supply.

(d)Drain the unit completely. Remove one threaded plug or bulbwell from the inlet side of the front header and one from the outlet side of the front header on the heat exchanger. Blow all water out of the heat exchanger.

(e)Drain pump and piping.

Freeze Protection for a Heating Boiler System (if required)

1.Use only properly diluted inhibited glycol antifreeze designed for hydronic systems. Inhibited propylene glycol is recommended for systems where incidental contact with drinking water is possible.

CAUTION	DO NOT use undiluted or automotive type
	antifreeze.

2.A solution of 50% propylene glycol will provide maximum protection of approximately -30°F.

3.Follow the instructions from the glycol antifreeze manufacturer. The quantity of glycol antifreeze required is based on total system volume including expansion tank volume.

4.Glycol is more dense than water and changes the viscosity of the system. The addition of glycol will decrease heat transfer and increase frictional loss in the heating boiler and related piping. A larger pump with more capacity may be required to maintain desired flow rates in a glycol system.

5.Local codes may require a back flow preventer or actual disconnect from city water supply when glycol antifreeze is added to the system.

Water Treatment

In hard water areas, water treatment should be used to reduce the introduction of minerals to the system. Minerals in the water can collect in the heat exchanger tubes and cause noise on operation. Excessive build up of minerals in the heat exchanger can cause a non-warrantable failure.