background image

13

        

Dual Fuel Supplemental Manual

3  

Diagrams 

(continued)

   

 

Figure 3-2 Wiring Diagram

WARNING

DISCONNECT POWER

BEFORE SERVICING

!

OUTLET SENSOR (S1)

FLUE SENSOR

FLUE SENSOR (S10)

PRE-MIX SENSOR 1 (S13)

-T

-T

-T

-T

-T

-T

OUTLET SENSOR (S9)

PRE-MIX SENSOR 1 (S11)

1.5A EACH MAX

CAM

E

-T

1

2

CN6-2

CN6-1

GY

PR

R

BAS

3

diagrams to troubleshoot unit.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

CN1-12

CN1-5

CN1-10

CN1-11

CN1-6

CN1-9

CN1-8

CN1-7

CN1-1

CN1-2

CN1-3

CN1-4

17

CN3-6

CN6-2

CN3-7

CN3-14

CN6-1

CN3-13

CN3-12

CN3-11

CN3-10

CN3-9

CN3-8

CN6-3

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

CN3-1

CN3-2

CN3-5

CN3-3

X3-2

X3-4

X6-1

X6-11

X3-1

X6-2

X6-14

X6-10

X6-4

X3-3

X7-8

X7-7

X8-14

X8-13

X8-12

X8-11

X8-15

X8-5

X8-6

X8-16

X8-7

X8-17

X8-18

X8-1

ALARM

CONTACTS

RUN-TIME

CONTACTS

TANK

THERMOSTAT

LOUVER

PROVING

AUX

SWITCH 1

AUX

SWITCH 2

SHIELD

SHIELD

A

B

MODBUS

OPTION

+

-

-

+

RATE

OUT

BOILER

PUMP OUT

SYSTEM RETURN

SENSOR

SYSTEM SUPPLY

SENSOR

0-10V

0-10V

TANK

SENSOR

OUTDOOR

SENSOR

+

+

-

-

0-10V

0-10V

BMS

IN

SYSTEM
PUMP IN

SHIELD

SHIELD

A

B

CASCADE

R

R

OR

OR

BL

BK

BR

R

Y

HIGH LIMIT

SWITCH

R

R

X6-1

X6-2

X6-3

GY

R

PR

BAS

BOARD

BL

R

BL

R

BR

W

OR

OR/W

P

W

BL

BK

J3-5

J3-4

J3-6

LWCO

BOARD

J3-3

J3-2

J2-1

J2-2

X6-3

OR

OR/BK

OR/BK

TEST

SWITCH

LWCO

PROBE

OR

OR

LWCO RESET

X6-5

BR

X13-1

PR

X6-6

BK

ENABLE

X8-3

X8-8

X8-2

X8-4

X8-9

X7-1

X7-5

X7-2

X7-6

INLET SENSOR

R

W

X4-1

X4-2

X4-3

X8-20

X8-10

X5-8

X5-7

X5-3

X5-9

X5-2

X5-4

X5-10

X5-5

X5-41

X5-6

X5-12

X5-1

"X5"

BLOCK WIRING

IS MODEL 

DEPENDENT

BK

T

BL

R/W

R

W

GY

GY

BR

X10-1

X1-3

X10-4

X1-1

X1-12

X1-2

X1-4

X10-2

X10-5

X10-3

X10-6

X1-6

L

N

GND

120V

SUPPLY

ON/OFF

SWITCH

GND

CAM

SWITCH

BK

W

PR

T

OR

OR

BL

R

BL

X6-18

X6-8

X1-8

G

X6-9

MAIN

BLOWER

BLOWER

R

BK

GY

W

T

BK

X2-3

X1-7

X1-10

X1-5

TRANSITION

FLAME SENSE

LG CON BRD

FLAME SENSE

SPARK

GENERATOR

SPARK ROD  

X2-5

FLUE DAMPER

TRANSFORMER

X13-4

FLUE DAMPER

24V

TRANSFORMER

BL

R

R

R

P

BK

BL

Y

OR

Y

BK

X1-2

X1-3

X1-1

INTEGRATED CONTROL

CN6-3

1

or ribbon cables can lead to operational problems which could resu lt in non-repairable damage to the integrated controller or o ther components.

BOARD

JUNCTION

BOX

X11

X4

USB

INTERFACE

BOILER PUMP
CONTACTOR

SYSTEM PUMP
CONTACTOR

DHW PUMP
CONTACTOR

HIGH VOLTAGE

LOW VOLTAGE
120 VAC

Y/BK

CN3-4

100266353  REV A

OR

24 VAC LOUVER

RELAY COIL

X6-13

X6-15

X6-12

OR/BK

OR

AIR VALVE

OR/W

BL

Y

BL

Y

BL

OR/R

OR/W

SMALL

PROPANE

VALVE

SMALL

NATURAL

VALVE

OR/BK

R/W

LARGE

PROPANE

VALVE

LARGE

NATURAL

VALVE

R/BK

CAM

SWITCH

CAM

SWITCH

PROPANE LIGHT

NATURAL LIGHT

AIR VALVE

PRESSURE

SWITCH

CAM

SWITCH

PROPANE LGPS

NATURAL LGPS

BLOCKED FLUE

SWITCH

BLOCKED DRAIN

SWITCH

X6-17

SWITCH

M

M

5

4

3

2

1

3

2

3. Actual connector block locations may vary from those shown on diagrams.  Refer to actual components for proper connector blo ck locations when using

LARGE CONNECTION BOARD

SMALL

CONNECTION

DUAL SENSOR

OPTIONAL ITEMS

SINGLE HOUSING

BOX DEPICTS

USB CABLE

WIFI

DONGLE

OPTIONAL USB/WIFI

ETHERNET CABLE

EXTENSION CABLE

OPTIONAL

GND

J10

J2 J11

J12

J23

J6

J7

J8

J9
J17

8

43

24V

Notes:
1. All wiring must be installed in accordance with:  local, stat e, provincial and national code requirements per either N.E.C.  in USA or C.S.A. in Canada.
2. If any original equipment wire as supplied with the appliance mu st be replaced, it must be replaced with wire having same wi re gauge (AWG) and rated for a
minimum of 105°C.  Exceptions:  Replacement high voltage spark lead and ribbon cables must be purchased from the factory.  Use  of a non-approved spark lead

BOX DEPICTS

LCD

DISPLAY

Summary of Contents for Crest 1251

Page 1: ...along with the Crest Installation and Operation Manual and the Crest Service Manual before installing Perform steps in the order given Failure to comply could result in severe personal injury death o...

Page 2: ...situation which if not avoided may result in minor or moderate injury CAUTION used without the safety alert symbol indicates a potentially hazardous situation which if not avoided may result in prope...

Page 3: ...ernal to the appliance Do not use this boiler if any part has been under water The possible damage to a flooded appliance can be extensive and present numerous safety hazards Any appliance that has be...

Page 4: ...o flow only if the gas valves are powered and combustion air is flowing 7 Small propane valve Valve 1 Propane The small propane gas valve senses the negative pressure created by the blowers allowing g...

Page 5: ...tes Department of Energy 2 Net AHRI ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pickup Rati...

Page 6: ...to the appliance 13 Remove the manometer from the pressure tap on top of the gas valve Remove the 1 8 3 mm field supplied fitting and reinstall the pipe plug removed in Step 3 DO NOT adjust or attemp...

Page 7: ...e replacement The gas valve MUST NOT be replaced with a conventional gas valve under any circumstances As an additional safety feature the gas valves have flanged connections to the venturis and blowe...

Page 8: ...oming gas pressure less than 4 inches w c 99 kPa If none of the above corrects the problem refer to the Troubleshooting Section of the Crest Service Manual Check system and boiler Check water piping 1...

Page 9: ...inspect the appliance and to replace any part of the control system and any gas control which has been under water OPERATING INSTRUCTIONS 1 STOP Read the safety information above on this label 2 Set...

Page 10: ...6 Insert the probe from a combustion analyzer into the hole left by the removal of the fitting 7 Once the boiler has modulated up to rate measure the combustion The values should be in the range list...

Page 11: ...ot in use FIG 2 3 Figure 2 3 Shutoff Valves NATURAL SHUTOFF VALVE PROPANE SHUTOFF VALVE DIR 2000508189 4 Turn on the shutoff valve for the one in use 5 Turn the main power ON 6 Using the Touch Screen...

Page 12: ...2 INTEGRATED CONTROL CN3 4 X8 15 X7 7 X8 11 X8 6 X8 16 X8 7 X8 17 X8 1 X8 3 X8 8 X8 2 X8 4 X8 9 X7 1 X7 5 GROUND X11 LCD DISPLAY X4 X5 1 X5 7 X5 2 X5 8 X5 3 X5 9 X5 4 X5 10 X5 5 X5 41 X5 6 CN3 12 BAS...

Page 13: ...R BL X6 18 X6 8 X1 8 G X6 9 MAIN BLOWER BLOWER R BK GY W T BK X2 3 X1 7 X1 10 X1 5 TRANSITION FLAME SENSE LG CON BRD FLAME SENSE SPARK GENERATOR SPARK ROD X2 5 FLUE DAMPER TRANSFORMER X13 4 FLUE DAMPE...

Page 14: ...Dual Fuel Supplemental Manual Notes 14...

Page 15: ...15 Dual Fuel Supplemental Manual Notes...

Page 16: ...Revision Notes Revision A Change 500001029 initial release MM 100268179_DIR 2000509263 Rev A 10 15...

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