Raypak 503-2003 High Limit - Manual Reset, High Limit - Auto Reset Optional, Flow Switch, Code

SECTION C: Installation

The optional adjustable manual reset high limit is lo- cated inside the heater junction box. Push the reset button and adjust the setting to approx. 40°F above desired outlet temperature.

Fig. 29: Ignition Module

The standard single-try ignition module will lock out after failing to light one time. To reset it, press and release the small, recessed black push button located inside of the cut-out on the lower right-hand corner of the ignition module case. Turning off the power to the heater WILL NOT reset the ignition module.

The optional ignition module will attempt to light three times before locking out. To reset it, turn off power to the heater, wait 30 seconds and re-apply power.

Code		Condition
On		System OK; No faults present
Off		Possible control fault; Check power
1 Flash		Low air
2 Flashes		Flame in combustion chamber;
		No call for heat
3 Flashes		Ignition lockout
4 Flashes		Low HSI current
5 Flashes		Low 24 VAC
6 Flashes		Internal fault; Replace control
		Table O: Ignition Module
	Diagnostic LED Flash Codes

High Limit - Manual Reset

The heater is equipped with a fixed setting manual re- set high limit temperature device as standard or it may have an optional adjustable setting manual reset high temperature device.

The fixed setting manual reset high limit is located on the In/Out header of the heat exchanger on the right side of the heater (accessible through the front door for reset as necessary).

Fig. 30: Fixed Setting & Adjustable High Limit

(Manual Reset)

High Limit - Auto Reset (Optional)

The heater may be equipped with an optional adjust- able auto reset high limit temperature device.

The optional adjustable auto reset high limit is located inside the heater junction box. Adjust the setting to approx. 20°F above desired outlet temperature.

Fig. 31: Adjustable High Limit (Auto Reset)

Flow Switch

This standard, dual-purpose control, mounted and wired in series with the main gas valve, shuts off heater in case of pump failure or low water flow.

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