Raypak Y-200 manual The Reset Parameter, Holiday, Reset Ratio, Temperature F, Outdoor, System

Holiday:

					Screen number
S E T T I N G	H O L		I	D A Y	0 5
H O L # X X	X X — X X — X X
Thirty two holidays are	Month:	Day:		Year:
selectable (01-32)	01 thru 12	01 thru 31		01 to 99; Below 01 is
				Repeating Holiday (RH) setting

NOTE: Previous screen (04) is used for entering the offset value in degrees.

Reset Ratio:

Ratio of outdoor temperature to water system

temperature. Range: . 01:1 to 8:1 or "None" forScreen number constant water temperature

(then TARGET=SETPOINT). Default value is 1.00:1.

R	S	T	R	A T	I O	X . X	X :	1	0 6
X	X	X	. X	@ 7	0	X X	X .	X @ X X

Default:

System temperature at 70°F (21.1°C) 140°F @ 70°F (60°C @ 21.1°C)

NOTE: The reset ratio can be modified by changing either the ratio value in line #1 or the system temperature value in line #2.

NOTE: When the reset ratio selected is "NONE", line 2 disappears.

NOTE: Use reset ratio "NONE" when using this controller for domestic hot water or pool applications.

The Reset Parameter

Sets the desired change in system. Water temperature increases as the outdoor temperature decreases. The reset ratio selector is used to determine the rate of change of the boiler(s) output water temperature rela- tive to a change in the outdoor temperature. The first number of the ratio refers to the outdoor temperature

Default:

System temperature at °F

This value is 200°F @ 10°F (93.3°C @ -12.2°C)

and the second number refers to the degree(s) of change for the water temperature, e.g., a ratio of 2:1 means for every 2° change in outdoor temperature, the System Temperature will change 1°. (The reset temp cannot exceed the temp limits set on screen #08.)

Example: Setpoint = 135°F

Ratio	Temperature °F
	Outdoor	System
	70	135
2:1	60	140
	40	150
	20	160

Table G: Outdoor to System Temperature Ratio

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