Slave, Dhw, Manual LEAD-LAG, Output Override

SLAVE

Sw #3 - Master/SlaveOff - Designates the Y-Series as a Master Control (Normal)

On - Designates the unit as a slave (used for ganged Y-Series' controlling 9 to 24 firing stages)

DHW

Sw #4 - Outdoor ResetOff - Minimum allowable Set Point of 105°F reduces potential of condensensing the boiler. On - Set Point can be reduced to 40°F for special applications (e.g. water source heat pumps, etc.)

Sw #5 - 8 - Reserved

Reserved for future use.

S-4

MANUAL LEAD-LAG

The Lead-lag Selector Switch (S4) is a ten (10) position rotary switch. Switch positions 0 and 9 are not used. In manual lead-lag selection, the Lead-lag Selector is used to select the lead boiler (stage). This is normally shipped from the factory set at position 1. If auto lead-lag is used, do not adjust this switch.

Fig # 9244

S-5

OUTPUT OVERRIDE

The Bypass Switches: Switch (S5) is a ten (10) position dip switch. Switch position 10 is not used. The Bypass Switch enables the user to turn on any of the outputs regardless of the current settings and conditions. Switch position 9 will turn on the pump and the remaining eight switches will each override one of the output stages. The pump switch and the output stages switches are interlocked such that the output stages can only be turned on if the pump is on.

Fig # 9243

S-1

SYSTEM TEST

The System Test Switch (S1) is comprised of a single momentary push button switch. When depressed it should cause the Status Indicators to blink five times. This test sequence is an indication of the functioning status of the embedded micro-controller. The Status Indicators revert back to their original indications after the test sequence is

completed.

Fig # 9247