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16

PROGRAMMING

TIME/DAY MENU – PROGRAMMING

The control cycles through the Stage Two "BOILER HOURS OF USE" 

display for 20 seconds and then times-out. If "Item"  is pressed 

within the 20 seconds, the control advances to Stage Three, etc.

S

USE

S

M

W T F

T

S

USE

S

M

W T F

T

BOILER HOURS OF USE

S

USE

S

M

W T F

T

Stage 

number 

One

16,304 hrs.

1 to 999 thousand hours

0 to 999 hours

Auto-cycle, 

time-out display

S

USE

S

M

W T F

T

S

USE

S

M

W T F

T

S

USE

S

M

W T F

T

Stage 

number

Two

16,289 hrs.

0 to 999 hours

Auto-cycle, 

time-out display

The control cycles 
through the Stage 
One "BOILER 
HOURS OF USE" 
display for 20 
seconds and then 
times-out.
If "Item" is pres-
sed within the 20 
seconds, the control 
advances to display 
Stage Two hours.

Menu

Item

Override

Menu

Item

Override

BOILER HOURS OF USE MENU – VIEWING

OR

Fixed display #4,

 after 

power-up

TIME/DAY

Fixed display #4,

 in use

(48 hrs. battery back-up)

TIME/DAY

S

T I M E

AM

S

M

W T F

T

Press     or     to increa-

se or decrease minutes

S

T I M E

S

M

W T F

T

Press     or     to increa-

se or decrease hours

Time-out 

Displays

Must be set to 

"Int. timer"

Auto

Stage

1   2   3   4   5   6   7   8

Perm.
Demand

Ext. timer

Fixed last

Int. timer

Lo-Hi fire

Fixed lead

Rotate

Off

1

2

3

4

5

6

7

8

9

External
Demand

Off

1

2

3

4

5

6

Stpnt

Reset

1

OCC

Full Display Flashing
(Programming Required)

S

T I M E

S

M

W T F

T

S

T I M E

AM

S

M

W T F

T

OCC

1

S

T I M E

AM

S

M

W T F

T

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Press     or  
to change
the day
pointer

PROGRAM MENU – VIEWING

Must be set to 

"Int. timer"

Auto

1   2   3   4   5   6   7   8

Perm.
Demand

Ext. timer

Int. timer

Off

1

2

3

4

5

6

7

8

9

External
Demand

Off

1

2

3

4

5

6

Stpnt

Reset

PRGM

S

S

M

W T F

T

PRGM

S

S

M

W T F

T

S

PM

UNOCC

S

M

W T F

T

PRGM

S

AM

OCC

S

M

W T F

T

1

OR

To advance to

 viewing only 

of program, just wait 5 

seconds and current "day" 

will be indicated

Press "Item" and 

advance to "P 1"

PRGM

S

S

M

W T F

T

Note: These program displays are "Time-out" displays

Repeat to advance to "P 2, 3, 4, 5 or 6" 

A flashing underscore indicates an 

active program. Wait 20 seconds to 

time-out to "ACTUAL SUPPLY" fixed 

display or Press "Menu" to advance to 

viewing "BOILER HOURS OF USE" 

and other menu selections

Press     or     to view 

different days or press 

"Item" repeatedly to scroll 

through each time and 

temperature in sequence

PRGM

S

S

M

W T F

T

PRGM

1

PRGM

S

PM

UNOCC

S

M

W T F

T

2

PRGM

S

PM

OCC

S

M

W T F

T

2

OR

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

Menu

Item

Override

PROGRAM MENU – "P 1 TO P 6 PROGRAMMING

To Select a Program:

Choose the program you would like to enter (page 18)
Advance to "PROGRAM MENU" and press "Item"repeatedly 
until that program indicator is displayed

Menu

Item

Override

PRGM

S

S

M

W T F

T

PRGM

S

S

M

W T F

T

PRGM

S

S

M

W T F

T

Press     and     

at the same time

and hold for at least one second

The program has now been 
selected. Refer to PROGRAM 
MENU - VIEWING above.

The word "SEL" will appear 

until the    and    are released, 

and then the display will 

advance to the viewing stage 

of that program.

Summary of Contents for Eight Stage Boiler Control 258

Page 1: ...mand Minimum WWSD Pump Stage 1 Stage 2 Comb air Stage 3 Stage 6 Stage 5 Stage 8 Stage 7 Stage 4 Menu Item Override Setpoint Actual Supply Target Supply S PRGM TEMP F C TIME USE AMPM UNOCC OVR M T W T...

Page 2: ...ugh water to keep the room temperature warm particularly during the colder weather If the Heating Curve selected is too high the supply water will be too hot for the conditions and the building will o...

Page 3: ...ntrol The effect of the Integral function can also be easily viewed by not allowing a rise in supply temperature when the control asks for more heat The displayed target temperature will show a slow b...

Page 4: ...allow Heating Curve operation System pump light on the system pump relay is on closing the contacts between terminals System Pmp 3 4 Comb air light on the combustion air relay is on closing the contac...

Page 5: ...e Occupied room temperature setting the control enters WWSD When switched into Unoccupied mode the UNOCC display element will replace the OCC display element and the control will switch from operating...

Page 6: ...e Stage and Comb air lights will be shut off with the boilers and combustion air damper The control will continue to cycle the boilers and combustion air damper to maintain the supply at the target te...

Page 7: ...lighter guage wire is too fragile and may also contribute too much resistance to the circuit Power should not be applied to any of the wires during this rough in wiring stage Step Four Electrical con...

Page 8: ...nals Heat Dem 5 and 6 When 24Vac is applied to these terminals the control will recognize a call for heat from the system DIP switch must be set to Reset If a 24Vac Setpoint Demand signal is used aqua...

Page 9: ...powered up the combustion air damper should operate If it does not come on check the circuit wiring for errors and ensure that it is powered up and the voltage is correct Check the devices in the cir...

Page 10: ...e Heating Curve use the following formula Outdoor air temperature Supply water temperature 50 10 30 1 10 12 10 F 23 C 110 43 70 21 70 21 90 32 210 99 170 77 150 65 130 54 190 88 3 6 3 0 2 4 2 0 1 6 0...

Page 11: ...w Domestic Hot Water boilers to be switched over to assist the heating boilers during peak load times Int timer switch The 258 control has an internal timer programmed using the LCD display and keypad...

Page 12: ...tback and delivering cold water to the boilers increased load Typically this will cause many or all of the boilers to be staged on with minimum delay which is the correct control action for the situat...

Page 13: ...ustion air damper will remain open After the 5 minutes the control will automatically exit the test routine and enter the normal operating mode If there is no Heat Demand the control will not allow a...

Page 14: ...ply temperatures and the LED system status lights display the operation of the various system components A competent troubleshooter can locate system faults without having to go any further than obser...

Page 15: ...tual Supply Target Supply F S TEMP OCC S M W T F T Auto Stage 1 2 3 4 5 6 7 8 Perm Demand Ext timer Fixed last Int timer Lo Hi fire Fixed lead Rotate Off 1 2 3 4 5 6 7 8 9 External Demand Off 1 2 3 4...

Page 16: ...ress or to change the day pointer PROGRAM MENU VIEWING Must be set to Int timer Auto 1 2 3 4 5 6 7 8 Perm Demand Ext timer Int timer Off 1 2 3 4 5 6 7 8 9 External Demand Off 1 2 3 4 5 6 Stpnt Reset P...

Page 17: ...button when the control is showing a fixed display Setpoint Actual Supply Target Supply F S TEMP S M W T F T OVR UNOCC Which mode is selected See page 3 Menu Item Override Menu Item Override Menu Item...

Page 18: ...nOcc 1 5 00 pm Occ 2 10 30 pm UnOcc 2 Friday 6 00 am Occ 1 8 30 am UnOcc 1 5 00 pm Occ 2 11 30 pm UnOcc 2 Saturday 8 00 am Occ 1 11 30 pm UnOcc 1 Null Occ 2 Null UnOcc 2 Schedule P 5 Day Time Temperat...

Page 19: ...when powered down for up to 10 years Battery backup Maintains clock operation for 24hrs when powered down Dial Switch Settings Heating Curve 0 4 to 3 6 Minimum Off 80 to 170 F Off 27 to 77 C Boiler D...

Page 20: ...antability and fitness for a particular purpose shall not extend beyond 24 months from the date of invoice or 12 months from the date of installation of the product whichever occurs first Replacements...

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